JP2008240211A - Method for producing knitted lace and knitted lace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knitted lace capable of suppressing lowering aesthetic sense and preventing fray of yarn and to provide a method for producing the knitted lace. <P>SOLUTION: A part of a heat-bonding yarn 23 is partially melted by heating lace knitted fabric 20 after knitting at a temperature lower than melting temperature of a chain knitting yarn 21 and a temperature not lower than melting temperature of the heat-bonding yarn 23. A part of melted parts is attached to the chain knitting yarn 21 and an inserting yarn 22. In this way, connected states of each yarn 21-23 are maintained and fray of the yarn can be prevented. A melted part 100 can be formed by further breaking the heat-bonding yarn 23. Consequently, even if a part of the chain knitting yarn 21 constituting a chain knitting structure is divided, loosening of the chain knitting structure is prevented in attached part of the heat-bonding yarn 23 and it can be suppressed to loosen the chain knitting structure beyond the attached part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a knitted lace manufacturing method and a knitted lace manufactured by the manufacturing method.

  A first conventional knitted lace fabric is disclosed in Patent Document 1, for example. In this knitted lace fabric, a heat-soluble heat-bonding yarn is knitted into the scalloped portion. By heating the knitted lace fabric after knitting, the thermal bonding yarn is melted. The thermal bonding yarn bonds the overlapping portion between the base portion of the picot yarn and the other yarn, and dissolves and removes the exposed portion of the thermal bonding yarn other than the overlapping portion. This prevents fraying at the scalloped portion of the knitted lace.

  A second conventional knitted lace fabric is disclosed in Patent Document 2, for example. In this lace fabric, the covering yarn is knitted into the scalloped portion. The covering yarn is composed of a core yarn having heat melting property and a covering yarn which is a thermoplastic synthetic fiber yarn. By heating the knitted lace fabric after knitting, a part of the core yarn of the covering yarn is melted, and the melt oozes out from between the coated yarns. The melt is solidified by adhering other adjacent yarns. This prevents fraying at the scalloped portion of the knitted lace.

Japanese Examined Patent Publication No. 63-52142 Japanese Patent Laid-Open No. 11-81073

  In the first and second prior art lace fabrics described above, the thermal bonding yarn is knitted only in the scalloped portion. In this case, the knitted lace formed by heating the lace knitted fabric is still easily frayed except at the scalloped portion. In addition, after the production of the knitted lace, the thermal bonding yarn may be dissociated from the remaining yarn. In this case, the bonding of the plurality of yarns by the thermal bonding yarn is released, and fraying may occur from the dissociated portion.

  Therefore, an object of the present invention is to provide a knitted lace that can prevent fraying of a yarn and a method for manufacturing the knitted lace.

The present invention forms a chain knitting structure in which a plurality of loop-shaped portions are formed by a chain knitting yarn, and a thermal bonding yarn having a melting temperature lower than that of the chain knitting yarn is knitted into the chain knitting structure to expand and contract. A knitted fabric knitting process for knitting a knitted fabric having the properties,
A heating step of heating the knitted fabric containing the thermal bonding yarn to a temperature lower than the melting temperature of the chain knitting yarn and higher than the melting temperature of the thermal bonding yarn;
A knitting lace manufacturing method characterized by including a breaking step of applying tension to a knitted fabric containing a thermal bonding yarn to break the molten thermal bonding yarn into a plurality of pieces.

  Further, the present invention provides a knitting condition in the knitted fabric knitting step so that the elongation limit amount ε1 of the entire knitted fabric excluding the thermal bonding yarn after the heating step is larger than the elongation limit amount ε2 of the thermal bonding yarn after the heating step. And heating conditions in the heating step are set.

Moreover, this invention is characterized by performing the said heating process and the said fracture | rupture process simultaneously.
Further, the present invention is characterized in that the heating condition in the heating step is set to a heating condition that melts the thermal bonding yarn and prevents brittleness of the yarn other than the thermal bonding yarn included in the knitted fabric. .

  Further, the present invention is characterized in that the heating condition in the heating step is set to a heating condition in which the thermal bonding yarn is divided by melting.

  In the knitted fabric knitting process, the present invention uses a polyester-based thermoplastic polyurethane elastic yarn of 10 denier or more and 300 denier or less as a thermal bonding yarn, and is heated at a heating temperature of 170 ° C. or more and 195 ° C. for a time of 30 sec or more and 90 sec or less. It is characterized by doing.

Further, in the knitted fabric knitting process, other insertion yarn is knitted in addition to the thermal bonding yarn,
In the chain knitting portion, the first loop-shaped portion and the second loop-shaped portion are alternately arranged in a plurality of stages in the course direction, and the second loop-shaped portion is a first stage in the course direction of the second loop-shaped portion. The loop-shaped portion is inserted to extend toward the rear stage in the course direction, and the second loop-shaped portion is connected to the first loop-shaped portion at the rear stage in the course direction through the first loop-shaped portion at the same stage in the course direction. Is formed in a chain and extends in the course direction,
In the portion where the thermal bonding yarn and the other insertion yarn are knitted together, the direction of insertion between the first loop-shaped portion and the second loop-shaped portion is different between the thermal bonding yarn and the other insertion yarn. It is characterized by.

In the knitted fabric knitting process, the elastic yarn having elasticity other than the thermal bonding yarn is knitted in an extended state,
In the chain knitting portion, the first loop-shaped portion and the second loop-shaped portion are alternately arranged and arranged in a plurality of stages in the course direction, and the second loop-shaped portion to be noticed is located at the front stage in the course direction of the second loop-shaped portion. The first loop-shaped portion is inserted through the first loop-shaped portion in the course direction and the second loop-shaped portion extends through the first loop-shaped portion in the course direction. By being connected, it is formed in a chain and extends in the course direction,
In the portion where both the thermal bonding yarn and the stretch yarn are knitted, the direction of insertion between the first loop-shaped portion and the second loop-shaped portion is different between the thermal bonding yarn and the stretch yarn. .
Moreover, this invention is a knitted lace manufactured by the manufacturing method of the above-mentioned knitted lace.

  According to the first aspect of the present invention, by heating the lace knitted fabric to a temperature lower than the melting temperature of the chain knitting yarn and equal to or higher than the melting temperature of the thermal bonding yarn, a part of the thermal bonding yarn is partially Dissolve. A part of the dissolved portion adheres to the chain stitch yarn. By solidifying in this state, it is possible to prevent the chain knitting yarn in contact with the thermal bonding yarn from being released from the thermal bonding yarn in the knitted lace manufactured using the knitted lace fabric. Further, the yarns in contact with the thermal bonding yarn can be bonded to each other by the thermal bonding yarn. As a result, the connected state of each yarn is maintained, and fraying of the yarn can be prevented.

  Further, tension is applied to the knitted fabric containing the thermal bonding yarn by a breaking process. At this time, when the amount of stretch of the knitted fabric exceeds the stretch limit of the thermal bonding yarn, the thermal bonding yarn is divided into a plurality of portions. The melted thermal bonding yarn attached to the chain knitting yarn is divided into a plurality of pieces, thereby forming a fused portion in which the thermal bonding yarn is arranged at intervals. The fused portion adhering to the chain knitting yarn becomes a resistor that resists unraveling of the chain knitting yarn. For example, it is possible to prevent further unraveling of the chain knitting yarn by biting the fused portion into the loop-shaped portion of the chain knitting yarn.

  Thus, according to the present invention, fraying of each yarn can be prevented in the knitted lace produced by heating the knitted lace fabric. For example, fraying of yarn caused by a manufacturing process such as sewing or cutting of a knitted lace, and fraying of yarn caused by a use state such as wearing or washing can be prevented, and quality can be improved. Further, since the chain knitting structure is achieved with yarns other than the thermal bonding yarn, the shape of the entire knitted lace can be stabilized by using a yarn having heat resistance as the chain knitting yarn.

  According to the invention of claim 2, the knitting conditions in the knitted fabric knitting step are such that the expansion / contraction limit amount of the entire knitted fabric after the heating step is larger than the elongation limit amount of the thermal bonding yarn after the heating step. And the heating conditions in a heating process are set. For example, a knitted fabric having stretchability is manufactured by knitting stretch yarn or giving chain stretch yarn itself stretchability. By stretching a stretchable knitted fabric larger than the elongation limit of the heat-bonded yarn after the heating process, the yarn other than the heat-bonded yarn such as chain knitted yarn is not broken, and the heat-bonded yarn is broken. It can be generated, and the strength of the lace fabric can be prevented from being lowered, and fraying of the knitted fabric can be prevented.

  Moreover, according to this invention of Claim 3, a heating process and a fracture | rupture process are performed simultaneously. As a result, the heating step and the breaking step can be performed at once, and the manufacturing period can be shortened. For example, in the heat setting step of preparing the knitted fabric into a predetermined shape, the heating step and the breaking step can be performed simultaneously. In this case, it is possible to realize melting the thermal bonding yarn and breaking the bonding yarn into a plurality of steps by performing only the heat setting step.

  According to the fourth aspect of the present invention, the thermal bonding yarn is melted under heating conditions that prevent brittleness of the yarn other than the thermal bonding yarn. As a result, fraying can be prevented and the strength of the knitted fabric can be prevented from decreasing.

  Moreover, according to this invention of Claim 5, while splitting a thermobonding thread | yarn by a fracture | rupture process, a thermobonding thread | yarn is also cut | disconnected by a heating process by setting a heating condition appropriately. As a result, the amount of heat-bonded yarn can be increased, and a fusion part that becomes a resistance against the unraveling of the chain knitting yarn can be formed more reliably, and the unraveling of the chain knitting yarn can be prevented more reliably. be able to.

  According to the present invention, the polyester thermoplastic polyurethane elastic yarn having a denier of 10 to 300 denier is used as a thermal bonding yarn and heated at 170 to 195 ° C. for 30 to 90 seconds. The brittleness of the yarn other than the thermal bonding yarn contained in the knitted fabric can be prevented, and the thermal bonding yarn can be sufficiently melted to break the thermal bonding yarn.

  According to the seventh aspect of the present invention, in the portion where the thermal bonding yarn and the other insertion yarn are knitted together, the first loop-shaped portion and the second loop-shaped portion are composed of the thermal bonding yarn and the other insertion yarn. The direction of insertion between is different. This makes it possible to reduce the amount of contact between the other insertion yarn and the thermal bonding yarn, to make it easier for the molten thermal bonding yarn to adhere to the chain stitch yarn, and to form a fused portion on the chain stitch yarn. Can be easier. For example, the insertion yarn other than the thermal bonding yarn may be a pattern yarn or jacquard yarn for forming a pattern on the knitted lace, or an elastic yarn for giving the knitted lace elasticity.

  According to the eighth aspect of the present invention, in the portion where both the thermal bonding yarn and the stretch yarn are knitted, the space between the first loop portion and the second loop portion is between the thermal bond yarn and the stretch yarn. Each direction is different. As a result, the contact amount between the stretch yarn and the thermal bonding yarn can be reduced, the melted thermal bonding yarn can be easily attached to the chain stitch yarn, and the fused portion can be easily formed on the chain stitch yarn. can do.

  Further, when the thermal bonding yarn has a higher dissociation property with respect to the chain knitting yarn than the stretch yarn, and when the thermal bonding yarn adheres to both the stretch yarn and the chain knitting yarn, the thermal bonding yarn is easily dissociated from the chain knitting yarn. In the present invention, since it is possible to prevent the thermal bonding yarn from adhering to both the stretch yarn and the chain knitting yarn, the possibility of the thermal bonding yarn dissociating from the chain knitting yarn can be reduced, and the resistance to fraying can be reduced. The fusion part which is a body can be easily left in the chain knitting yarn.

  According to the ninth aspect of the present invention, by heating the above-described lace knitted fabric, a part of the thermal bonding yarn contained in the lace knitted fabric is melted and the binding of the respective yarns is strengthened. Therefore, fraying about the knitted lace formed using the knitted lace fabric can be prevented. Further, fraying can be further prevented by breaking the thermal bonding yarn to form a fused portion.

  FIG. 1 is a knitting organization chart showing a part of a lace fabric 120 according to the first embodiment of the present invention. FIG. 2 is a knitting organization chart showing a part of the first precursor knitted fabric 20 that is a precursor of the lace knitted fabric 120. FIG. 3 is a knitting structure diagram of the first precursor knitted fabric 20 in which yarns other than the chain knitting yarn 21 and the thermal bonding yarn 23 are omitted. 1 to 3 schematically show a knitted structure for easy understanding. The actual knitted structure of the lace knitted fabric 120 and the first precursor knitted fabric 20 is the first knitted structure. The radii of curvature of the loop-shaped portion 24 and the second loop-shaped portion 25 are small, and the yarns 21, 22, and 23 are in close proximity or in contact with each other. In the present invention, the knitted fabric knitted by the yarns 21, 22, and 23 is referred to as a first precursor knitted fabric 20. Moreover, what heated the 1st precursor knitted fabric 20 is called a 2nd precursor. Further, the one obtained by breaking the thermal bonding yarn 23 contained in the second precursor into a plurality of pieces is referred to as a lace knitted fabric 120, and a product manufactured using the lace knitted fabric 120 is referred to as a knitted lace. In the present embodiment, the first precursor knitted fabric 20 is a warp knitted fabric knitted with knitting yarn.

  The knitted lace fabric 120 and the first precursor knitted fabric 20 have a plurality of through holes, and a lace pattern is formed by the shape and arrangement of the through holes. The lace knitted fabric 120 and the first precursor knitted fabric 20 have a pattern portion with a dense amount of yarn arranged per unit area and a base portion with a sparse amount of yarn arranged per unit area. However, a pattern is formed by the shape and arrangement of these handle portions and base portions. Such a knitted lace fabric with a pattern is used for women's underwear, for example.

  As shown in FIG. 2, the first precursor knitted fabric 20 includes a chain knitting yarn 21, a thermal bonding yarn 23, and an insertion yarn 22. The chain knitting yarn 21 may be referred to as a warp yarn or a ground knitting yarn. The insertion yarn 22 may also be referred to as a weft yarn. The thermal bonding yarn 23 is a yarn having a lower melting temperature than other yarns used as the first precursor knitted fabric 20 and has thermoplasticity.

  FIG. 4 is a flowchart showing a manufacturing process of the knitted lace fabric 120 of the present embodiment. First, at step a0, preparation of knitted fabric knitting is performed by selecting each knitting yarn used for the knitted lace, determining a pattern to be formed on the knitted lace, and designing a knitted fabric for forming a desired knitted structure. Is completed, the process proceeds to step a1 to start manufacturing the knitted lace fabric 120.

  In step a1, a knitted fabric knitting process for knitting the first precursor knitted fabric 20 as a precursor of the lace knitted fabric 120 is performed using a knitting machine. The knitting machine knitting the first precursor knitted fabric 20 shown in FIG. 2 by knitting the yarns 21 and 22 such as the thermal bonding yarn 23 into the chain knitting yarn 21 in accordance with the knitting order designed in step a0. . Accordingly, the first precursor knitted fabric 20 forms a chain stitch structure in which a plurality of loop-shaped portions are formed by the chain stitch yarn 21, and the thermal bonding yarn 23 is knitted into the chain stitch structure.

  At least one of the yarns included in the first precursor knitted fabric 20 has stretchability. Specifically, at least one of the chain knitting yarn 21, the thermal bonding yarn 23, and the other yarn has elasticity. The knitting machine performs the knitting operation in a state where the stretchable yarn is stretched. The first precursor knitted fabric 20 is contracted after knitting by the restoring force of the yarn knitted in the stretched state, and has elasticity. When the knitting of the first precursor knitted fabric 20 is thus completed, the process proceeds to step a2.

  In step a2, a heating process is performed in which the first precursor knitted fabric 20 knitted in step a1 is heated to a temperature lower than the melting temperature of the chain knitting yarn 21 and higher than the melting temperature of the thermal bonding yarn 23. As a result, a second precursor knitted fabric in which a part of the thermal bonding yarn 23 is partially dissolved is formed. A part of the dissolved portion of the second precursor knitted fabric adheres to the chain knitting yarn 21 and the insertion yarn 22. In this state, the thermal bonding yarn 23 is solidified, so that the chain stitch yarn 21 and the insertion yarn 22 in contact with the thermal bonding yarn 23 are prevented from being released from the thermal bonding yarn 23. Further, the yarns 21 and 22 that are in contact with the thermal bonding yarn 23 are bonded to each other by the thermal bonding yarn 23. When the thermal bonding yarn 23 thus melted is attached to the other yarns 21 and 22, the process proceeds to step a3.

  In step a3, a breaking process is performed in which the second precursor knitted fabric formed in step a2 is stretched by applying tension to break the thermal bonding yarn 23 after melting into a plurality of pieces. When the tension is applied to the second precursor knitted fabric, the thermal bonding yarn 23 is divided into a plurality of portions by the elongation amount ε3 of the second precursor knitted fabric exceeding the elongation limit amount ε1 of the thermal bonding yarn 23. . When the melted thermal bonding yarn 23 is broken as described above, a knitted lace fabric 120 as shown in FIG. 1 can be formed, and the process proceeds to step a4.

  In step a4, after refining the formed knitted lace fabric 120 after step a3, heat treatment called final heat set is performed to fix the form, and a lace product is manufactured using such a lace knitted fabric. The production of the knitted fabric 120 is finished.

  As shown in FIGS. 1 and 2, the lace knitted fabric 120 of the present embodiment has a thermal bonding yarn 23 that is melt-bonded to each yarn as compared to the first precursor knitted fabric 20 immediately after the knitting of the knitted fabric is completed. Is divided and formed. In other words, the thermal bonding yarn 23 of the lace fabric 120 is intermittently positioned in the course direction C.

  The divided thermal bonding yarns 23 constitute a plurality of fused portions 100 that are arranged at intervals in the course direction C. Each fused portion 100 is attached to the yarns 21 and 22 other than the thermal bonding yarn 23 with a space therebetween. Each fused portion 100 is displaced with the yarn to be attached, independently of the other fused portions 100.

  As shown in FIG. 1, the fused portion 100 may adhere to one yarn other than the thermal bonding yarn 23, or may adhere to a plurality of yarns other than the thermal bonding yarn 23. For example, one fused portion 100 may be attached by connecting the chain knitting yarn 21 and the insertion yarn 22. Further, there may be a case where one fused portion 100 connects and attaches two portions of the chain knitting yarn 12.

  In the yarns 21 and 22 other than the thermal bonding yarn 23, a portion where the fused portion 100 is attached forms a raised portion protruding from the surface of the exposed portion where the fused portion 100 does not exist. In other words, the yarns 21 and 22 to which the thermal bonding yarn 23 is attached are formed with convex portions due to the adhesion of the fused portion 100. As a result, the fused portion 100 attached to each of the yarns 21 and 22 becomes a resistor that resists the unwinding of each of the yarns 21 and 22.

  FIG. 5 is a diagram for explaining that the fused portion 100 becomes a resistor that resists unraveling. FIG. 5 (1) shows a state in which breakage occurs at the breakage portion 21 </ b> A of the chain knitting yarn 21. FIG. 5 (2) shows a state in which the chain knitting yarn 21 is pulled from the broken portion 21A.

  In the present embodiment, as shown in FIG. 5 (1), when the chain knitting yarn 21 is pulled toward the rear side of the course direction C starting from the broken portion 21A, the portion of the chain knitting yarn 21 adjacent to the broken portion 21A is In some cases, the first loop-shaped portion 24 may be pulled out sequentially and be on the front side in the course direction C. However, as shown in FIG. 5 (2), when the portion of the chain knitting yarn 21 to which the fused portion 100 adheres reaches the first loop-shaped portion 24, the fused portion 100 becomes the first loop-shaped portion 24. Get caught. In this way, the fused portion 100 is hooked on the first loop-shaped portion 24, thereby resisting the withdrawal of the chain knitting yarn 21 and preventing further withdrawal of the chain knitting yarn 21. As a result, the fraying of the chain stitch yarn 21 can be prevented and the fraying of the chain stitch yarn 21 can be prevented.

  In FIG. 5B, the space 102 of the first loop-shaped portion 24 is illustrated in a size that allows the fusion-bonded portion 100 to pass therethrough for easy understanding. The space 102 is formed to be sufficiently smaller than the fused portion 100. Therefore, it is possible to achieve an effect that fraying can be prevented due to the catching by the fused portion 100.

  FIG. 6 is a diagram for explaining that the fused portion 100, which is a raised melted deposit, becomes a resistor that resists unraveling. FIG. 6 (1) shows a state in which a break has occurred at the other broken portion 21 </ b> B of the chain stitch yarn 21. FIG. 6 (2) shows a state in which the chain knitting yarn 21 is pulled from another broken portion 21B.

  In this embodiment, as shown in FIG. 6 (1), when the chain knitting yarn 21 is pulled toward the rear side of the course direction C with the other broken portion 21B as a starting point, Adjacent portions may be sequentially drawn from the loop-shaped portion and pass through the first loop-shaped portion 24 on the front side in the course direction C. However, as shown in FIG. 6 (2), when the portion of the chain knitting yarn 21 that adheres to the insertion yarn 22 via the fused portion 100 reaches the first loop-shaped portion 24, it adheres to the chain knitting yarn 21. The inserted insertion thread 22 is caught on the first loop-shaped portion 24. Thus, the insertion yarn 22 is hooked on the first loop-shaped portion 24, thereby resisting the drawing of the chain knitting yarn 21 and preventing the further drawing of the chain knitting yarn 21. As a result, the fraying of the chain stitch yarn 21 can be prevented and the fraying of the chain stitch yarn 21 can be prevented.

  6 (2) shows a state where a part of the insertion yarn 22 passes through the space 102 of the first loop-shaped portion 24. One of the single fibers (monofilaments) constituting the insertion yarn 22 is shown in FIG. There is a case where the insertion yarn 22 is caught without the portion being drawn and the remaining single fiber being drawn. Also in this case, the effect that fraying can be prevented due to the hooking of the insertion thread 22 can be sufficiently achieved.

  Further, even if the fusion part 100 and the insertion yarn 22 are dissociated, if the fusion part 100 is attached to the chain stitch yarn 21, the fusion part 100 is changed as shown in FIG. It becomes resistance to unraveling and fraying of the chain knitting yarn 21 can be prevented.

  As described above, according to the present embodiment, the thermal bonding yarn 23 attached to the chain stitch yarn 21 is actively divided by the breaking process, and the original shape of the thermal bonding yarn 23 is broken. As a result, the fusion stitch portion 100 on which the thermal bonding yarns 23 are arranged at intervals is attached to the chain stitch yarn 21. In this way, the shape of the adhesive yarn 23 is changed to form irregularities on the chain stitch yarn 21. In other words, denier unevenness (thickness unevenness) is generated in the chain stitch yarn 21. The fused portion 100 serves as a resistance against the unraveling of the chain knitting yarn 21 and can prevent the unraveling of the chain knitting yarn 21 from proceeding. Further, since the thread-like thermal bonding yarn 23 does not remain on the knitted lace fabric 120, the thermal bonding yarn 23 has little influence on the pattern, and the aesthetics can be improved.

  In the present embodiment, the elongation limit amount ε1 of the entire second precursor knitted fabric excluding the thermal bonding yarn 23 is larger than the elongation limit amount ε2 of the thermal bonding yarn 23 after the heating step (ε1> ε2). ), Knitting conditions in the knitted fabric knitting process, and heating conditions in the heating process are set. For example, the second precursor knitting excluding the thermal bonding yarn 23 by knitting the stretch yarn into the chain knitting yarn 21 in the stretched state, giving the chain knitting yarn itself stretchability, or making the knitting structure knitted easily. Increase the total extension limit ε1 of the ground.

  On the other hand, the thermal bonding yarn 23 with a small fineness is used, the thermal bonding yarn 23 with a small elongation limit after melting, or the thermal bonding yarn 23 is realized with a material that becomes brittle after melting. The elongation limit amount ε2 of the thermal bonding yarn 23 after the heating step is reduced.

  The second precursor knitted fabric excluding the thermal bonding yarn 23 with the elongation amount ε3 of the second precursor knitted fabric stretched in the breaking step exceeding the elongation limit amount ε2 of the thermal bonding yarn 23 after setting in this way. The total elongation limit amount is less than ε1 (ε2 <ε3 <ε1). As a result, the yarns 21 and 22 other than the thermal bonding yarn 23 such as the chain knitting yarn 21 can be broken without breaking the thermal bonding yarn 23, and the strength of the lace knitted fabric 120 can be prevented from being reduced. Fraying of the ground 120 can be prevented.

  The heating condition in the heating process is set to a heating condition that melts the thermal bonding yarn 23 and prevents brittleness of the yarn other than the thermal bonding yarn 23 included in the knitted fabric. Moreover, it is preferable that the heating conditions in a heating process are set to the heating conditions in which the thermal bonding yarn 23 is divided by melting. Thereby, even before the breaking step, the thermal bonding yarn 23 divided into a plurality after the heating step can be attached to each yarn. That is, part of the thermal bonding yarn 23 may be melted or the whole may be melted. Further, by melting the entire thermal bonding yarn 23 so that the original shape that is in the form of a thread cannot be maintained, a large fused portion 100 can be formed, and fraying prevention can be more reliably performed.

  As the heating condition, for example, a heating temperature and a heating time are set. The minimum melting temperature at which the thermal bonding yarn 23 melts is B1, and the time until softening when heated at the minimum melting temperature is D1. Further, the minimum melting temperature at which the yarn other than the thermal bonding yarn 23 becomes brittle is defined as B2, and the time until softening when heated at the minimum melting temperature is defined as D2. In this case, in this embodiment, assuming that the heating temperature in the heating step is B3 and the heating time is D3, B1 <B3 <B2 and D1 <D3 <D2 are set.

  In the present embodiment, a polyester-based thermoplastic polyurethane elastic yarn having a denier of 10 to 300 denier, preferably 10 to 50 denier, is used as the thermal bonding yarn 23. Further, heat treatment is performed at a heating temperature of 170 ° C. or higher and 195 ° C. or lower for a heating time of 30 seconds or longer and 90 seconds or shorter. As a result, the thermal bonding yarn 23 can be melted and the remaining yarn can be prevented from becoming brittle. Further, the thermal bonding yarn 23 can be divided by melting. The thermal bonding yarn 23 is preferably made of a material that becomes brittle, that is, has a lower strength than that before melting, by solidifying after melting.

  For example, when the heating time is constant, if the heating temperature is less than 170 ° C., the adhesive force between the melted thermal bonding yarn 23 and the remaining yarn is reduced. Moreover, it is not parted as an adhesive yarn, the adhesive yarn itself remains, and the second precursor knitted fabric becomes hard. On the other hand, when the heating temperature exceeds 195 ° C., the remaining material such as nylon is thermally embrittled. On the other hand, in this embodiment, it can prevent that the problem mentioned above arises by making heating temperature into 170 degreeC or more and 195 degrees C or less as mentioned above.

  Moreover, when the fineness becomes too large, the thermal bonding yarn 23 is difficult to break. On the other hand, if the fineness is too small, the adhesive force is reduced and the fused portion 100 cannot be enlarged. On the other hand, when the fineness of the thermal bonding yarn 23 is 10 denier or more and 300 denier or less, the fusing portion 100 can be enlarged while easily breaking and maintaining the adhesive force. The fineness of the thermal bonding yarn 23 is further set to 10 denier or more and 50 denier or less to prevent the thermal bonding yarn 23 from being conspicuous with respect to the pattern, and the bonding between the chain stitch yarn 21 and the thermal bonding yarn 23 is performed. You can increase your power.

  Table 1 shows the fraying test results of the knitted lace of the present embodiment in which the thermal bonding yarn 23 was broken and the knitted lace of the comparative example in which the thermal bonding yarn 23 was not broken. .

  The fraying test was a washing method specified in the JIS-L-0217 103 method, in which repeated washing was performed to check whether fraying occurred in the race.

  As shown in Table 2, in the present embodiment in which the thermal bonding yarn 23 is broken, the degree of fraying is smaller than in the comparative example in which the thermal bonding yarn 23 is not broken. From this, it can be said that the knitted lace of the present embodiment can prevent fraying as compared with the comparative example.

  The thermal bonding yarn 23 is preferably a polyurethane elastic yarn manufactured by melt spinning technology, excluding the polyether polyurethane elastic yarn. As a result, the thermal bonding yarn 23 can be prevented from dissociating from the chain stitch yarn 21, and the thermal bonding yarn 23 can be suitably broken.

  FIG. 7 is a flowchart showing another manufacturing process of the knitted lace fabric 120. First, in step b0, as in step a1, when preparation for the knitted fabric is completed, the process proceeds to step b1 and the production of the lace knitted fabric 120 is started.

  In step b1, a knitted fabric knitting process for knitting the first precursor knitted fabric 20 serving as a precursor of the lace knitted fabric 120 is performed as in step b1. When the knitting is completed, the process proceeds to step b2.

  In step b2, a heat setting process for adjusting the knitted fabric into a predetermined shape is performed. The heat setting process is maintained in a predetermined shape. For example, the predetermined shape may be a flat shape or a shape in which pleats are formed. In the heat setting step, the first precursor knitted fabric is heated to a temperature equal to or higher than the melting temperature of the thermal bonding yarn 23 in a state in which the first precursor knitted fabric is stretched and maintained in a desired shape. As a result, the thermal bonding yarn 23 melts and adheres to other yarns. When the thermal bonding yarn 23 is solidified, the knitted fabric is maintained in the maintenance shape maintained at the time of heat setting, and deformation from the maintenance shape is prevented. Thus, in the heat setting step, the heating step for melting the thermal bonding yarn 23 and the breaking step for elongating the knitted fabric are performed simultaneously. When the heat setting process is completed, the knitted lace fabric 120 as shown in FIG. 1 can be formed, and the process proceeds to step b3.

  In step b3, after step b3, a lace product including the lace fabric 120 is manufactured using the formed lace fabric 120, and the manufacture of the lace fabric 120 is finished.

  As described above, the heating step and the breaking step are performed in parallel in the heat setting step of adjusting the knitted fabric into a predetermined shape. Thus, the thermal bonding yarn 23 can be melted and the bonding yarn 23 can be broken into a plurality of pieces only by performing the heat setting step. Thus, a manufacturing period can be shortened by performing a heating-heat process and a fracture | rupture process simultaneously. In the present embodiment, the heating step and the breaking step are simultaneously performed in the heat setting step for adjusting the knitted fabric into a predetermined shape, but the heating step and the breaking step are simultaneously performed without aiming at the heat setting. May be. Moreover, you may perform a heating process and a fracture | rupture process in other processes, such as a dyeing process.

  As shown in FIG. 3, in the first precursor knitted fabric 20, the chain knitting yarn 21 is chain knitted to form a first loop-shaped portion 24 and a second loop-shaped portion 25. The first loop-shaped portion 24 and the second loop-shaped portion 25 are formed alternately in a plurality of stages in the course direction C. Here, the first loop portion 24 may be referred to as a needle loop, and the second loop portion 25 may be referred to as a sinker loop.

  The first loop-shaped portion 24 and the second loop-shaped portion 25 are alternately connected and extend in the course direction C, whereby the wale 26 is formed. A plurality of wales 26 are formed side by side in the course direction C, and are connected to each other to form a chain stitch structure, in other words, a chain stitch structure. Further, the chain knitting yarn 21 swings as appropriate to connect the wales 26 adjacent in the wale direction W, thereby forming a chain knitting structure having a fraying prevention function. A portion where the chain stitch yarn 21 swings is referred to as a run stop portion 42.

  Each first loop-shaped portion 24 is generally formed in a U shape, and is arranged substantially side by side in a predetermined course direction C and a wale direction W orthogonal to the course direction C. Each first loop-shaped portion 24 opens to the front in the course direction C. The first loop-shaped portions 24 are aligned in the wale direction W to form a course, and the first loop-shaped portions 24 are aligned in the course direction C to form the wale 26.

  The second loop-shaped portion 25 connects the first loop-shaped portions 24 arranged in the course direction C. For example, attention is paid to one second loop portion 25a. One end of the second loop-shaped portion 25a to be noticed is connected to the end of the first loop-like portion 24a at the same stage as the second loop-shaped portion 25a to be noticed. The second loop-shaped portion 25a of interest passes through the first loop-shaped portion 24b of the preceding stage in the course direction C of the second loop-shaped portion of interest 25a from one side to the other side as it goes from one end to the other end. The second loop shape of interest extends to the rear stage of the course direction C and extends from the other side to the first stage of the first loop part 24a in the same stage as the second loop-like part 25a to be noticed. It continues to the end portion of the first loop-shaped portion 24c at the rear stage in the course direction C of the portion 25a. In this way, the loop-shaped portions 24 and 25 are connected in a chain, and a wale 26 extending in the course direction C is formed. The yarns 22 and 23 such as the insertion yarn 22 and the thermal bonding yarn 23 are knitted into the wale 26 by being sandwiched between the first loop portion 24 and the second loop portion 25.

  On the outer surface of the first precursor knitted fabric 20, the first loop-shaped portion 24 is hidden by the insertion yarn 22 and the thermal bonding yarn 23. Therefore, the pattern of the first precursor knitted fabric 20 and the lace pattern formed on the first precursor knitted fabric 20 are clearer than the lining.

  For example, the notable second loop-shaped portion 25a is inserted through the first loop-shaped portion 24b upstream of the second loop-shaped portion 25a in the course direction C to the front surface side, and the second loop-shaped portion 25a has the same course direction C as the second loop-shaped portion 25a. The first loop portion 24a of the step is inserted to the lining side, and is connected to the first loop portion 24c of the rear stage in the course direction C.

  The insertion yarn 22 is a yarn for forming a lace pattern in the chain stitch structure. The insertion yarns 22 are knitted into the wales 26 adjacent to each other in the wale direction W, thereby connecting the two wales 26 adjacent to each other in the wale direction W. As shown in FIGS. 1 and 2, the insertion yarn 22 includes a lateral swing portion extending from one wale 26 adjacent to the wale direction W to the other wale 26, and an insertion yarn knitting portion knitted into the wale 26. Have.

  In a space surrounded by the two laterally swinging portions arranged in the course direction C and the wale to which the laterally swinging portion is connected, a through hole that is inserted in the thickness direction of the knitted fabric is formed. By selectively arranging the laterally swinging portion of the insertion thread 22, the shape and the arrangement of the through holes are adjusted. As a result, a lace pattern represented by the arrangement and shape of the through holes can be formed on the first precursor knitted fabric 20. Here, the through-hole surrounded by the horizontal swing portion and the wale 26 may be filled with a pattern yarn described later to form a pattern.

  The insertion thread 22 extends to the surface side from the first loop-shaped portion 24. The insertion thread 22 extends between the first loop-shaped portion 24 and the second loop-shaped portion 25 set in advance and extends in the wale direction W. In the present embodiment, a plurality of insertion yarns 22 are knitted into the chain stitch structure, and each insertion yarn 22 is knitted side by side in the wale direction W. The position where each insertion yarn 22 is knitted is appropriately selected depending on the lace pattern formed on the first precursor knitted fabric 20.

  The thermal bonding yarn 23 is realized by a yarn having a melting point temperature lower than that of the chain stitch yarn 21 and the insertion yarn 22. In the present embodiment, a yarn that partially melts in the heating state in the heating step performed after knitting of the first precursor knitted fabric 20 is used. The thermal bonding yarn 23 is used for preventing fraying of the chain knitting yarn 21 and the insertion yarn 22 constituting the first precursor knitted fabric 20. In the present embodiment, the thermal bonding yarn 23 is realized by a non-coated yarn, that is, a bare yarn not covered with a coated yarn, a so-called bear yarn, and is realized by a polyurethane elastic yarn having a melting temperature of about 140 ° C. or more and 195 ° C. or less. The The thermal bonding yarn 23 is knitted into a chain stitch structure in a state of being stretched with respect to a natural state.

  In the present embodiment, as the thermal bonding yarn 23, a polyurethane elastic yarn having a low heat resistance is used. Specifically, any one of the thermal bonding yarns 23 in Table 2 below was used.

  Further, the heat bonding yarn 23 of the present embodiment has a set rate of about 85% when the wet heat treatment temperature is 105 ° C. after the treatment time is maintained at 100% in 60 minutes. When the wet heat treatment temperature is 120 ° C., the set rate is about 93%. When the wet heat treatment temperature is 130 ° C., the set rate is about 93%.

  Further, when the elongation rate is maintained at 100% in 1 minute and the wet heat treatment temperature is 120 ° C., the set rate is about 78%. When the wet heat treatment temperature is 140 ° C., the set rate is about 85%.

  The thermal bonding yarn 23 extends along the wale and is knitted into all the loop-shaped parts constituting the wale. Accordingly, in the chain knitting structure, the thermal bonding yarn 23 is knitted on both the base portion where the amount of yarn per unit area is sparse and the pattern portion where the amount of yarn per unit area is denser than the base portion. Is included. In the present embodiment, the first precursor knitted fabric 20 has a plurality of thermal bonding yarns 23, and each thermal bonding yarn 23 is knitted for each wale. Thus, the thermal bonding yarn 23 is knitted over the entire region of the chain stitch structure.

  The thermal bonding yarn 23 is arranged on the outer side of the first loop portion 24 (in FIG. 1 to FIG. 3, the front side perpendicular to the paper surface), and is arranged on the lining side of the second loop portion 25. The thermal bonding yarn 23 proceeds zigzag as it proceeds in the course direction C along the corresponding wale. For example, when the thermal bonding yarn 23 passes between the first loop-shaped portion 24a and the second loop-shaped portion 25a of interest and passes from one wale to the other in the course direction C, the first loop-shaped portion 24c of interest. Passing from one wale to the other wale between the first loop-like portion 24c and the second loop-like portion 25c of the course in the rear stage in the course direction C (upward in FIGS. 1 to 3).

  Immediately after the knitting, the thermal bonding yarn 23 passes through the outer side of the first loop-shaped portion 24 and extends to the lining side of the first precursor knitted fabric 20 with respect to the insertion yarn 22. Therefore, in the region where the thermal bonding yarn 23 and the insertion yarn 22 are inserted between the same first loop portion 24 and the second loop portion 25, the thermal bonding yarn 23 is the first loop portion 24 and the insertion yarn 22. Is inserted between. The insertion yarn 22 is inserted between the thermal bonding yarn 23 and the second loop portion 25. In this case, when the chain knitting yarn 21 is stretched in the course direction C, the radius of curvature of the first loop-shaped portion 24 and the second loop-shaped portion 25 is reduced, and the thermal bonding yarn 23 is connected to the insertion yarn 22 and the first yarn. It arrange | positions between the loop-shaped parts 24, and contacts the insertion thread 22 and the 1st loop-shaped part 24. FIG.

  In the present embodiment, in the region where the thermal bonding yarn 23 and the insertion yarn 22 are inserted between the same first loop-shaped portion 24 and the second loop-shaped portion 25, the thermal bonding yarn 23 and the insertion yarn 22 are: Crossing each other and passing through the first loop-shaped portion 24 and the second loop-shaped portion 25. Specifically, the thermal bonding yarn 23 has a first loop portion 24a of interest from the side where the first loop portion 24a of interest is continuous with the second loop portion 25b of the front stage in the course direction C (downward in FIGS. 1 to 3). It passes through the loop-shaped part 24a and the second loop-shaped part 25a of the same course in the course direction C.

  On the other hand, the insertion yarn 22 has a first loop-shaped portion 24a of interest and the course direction from the opposite side to the side where the first loop-shaped portion 24a of interest is continuous with the second loop-shaped portion 25b of the preceding stage in the course direction C. It passes through the second loop portion 25a of the same course of C. In this case, when the first precursor knitted fabric 20 is tensed in the course direction C, the thermal bonding yarn 23 and the insertion yarn 22 approach each other at a portion 31 that passes through the second loop-shaped portion 25 together.

  As described above, in the present embodiment, in the first precursor knitted fabric 20, both the thermal bonding yarn 23 and the insertion yarn 22 are knitted into the chain knitting yarn 21. The direction of insertion between the first loop portion and the second loop portion is different.

  As a result, the amount of contact between the insertion yarn 22 and the thermal bonding yarn 23 can be reduced, the thermal bonding yarn 23 melted in the heating process can be easily attached to the chain stitch yarn 21, and the lace fabric 120 is obtained. In this case, it is possible to easily form the fused portion 100 in the chain stitch yarn 21. In the present embodiment, the insertion yarn is set in addition to the thermal bonding yarn 23, but other yarns may be used. For example, the yarn crossed without being along the thermal bonding yarn 23 may be a pattern yarn or jacquard yarn for forming a pattern on the knitted lace, or an elastic yarn for giving the knitted lace elasticity. .

  Immediately after the knitting, the insertion yarn 22 and the thermal bonding yarn 23 knitted into the chain stitch structure are not completely restrained by the chain stitch structure, and therefore, a plurality of portions where the insertion yarn 22 and the thermal bonding yarn 23 are in contact with each other. Some of them may have a portion where the thermal bonding yarn 23 is arranged on the surface side of the insertion yarn 22. Even in this case, most of the plurality of portions where the insertion yarn 22 and the thermal bonding yarn 23 come into contact with each other are such that the thermal bonding yarn 23 is arranged on the lining side with respect to the insertion yarn 22.

  Further, multifilaments having a fineness of the chain knitting yarn 21 and the insertion yarn 22 of 50 denier or less, particularly 40 denier or less are used. The fineness of the chain knitting yarn 21 is such that it is as thin as possible when it is used as a knitted lace product. For example, it can be realized by various fibers such as nylon (polyamide synthetic fiber), rayon, polyester, acrylic, wool, cotton, hemp, rayon and polypropylene. Moreover, the various yarns used in this embodiment are merely examples, and other types of yarns may be used. In the present embodiment, the chain knitting yarn 31 is made of nylon fiber, and a fineness of 30 denier is selected. The insertion yarn 22 is made of multifilament fiber, and a 30-denier yarn is selected.

  Further, a polyurethane elastic yarn having a fineness of the thermal bonding yarn 23 of 10 denier or more and 300 denier or less is used. In addition to the polyurethane elastic yarn, any material having a relatively low melting temperature and thermoplasticity may be used, and may be realized by a polyamide synthetic fiber or the like. Alternatively, a non-stretchable thread may be used as the thermal bonding thread 23.

  The first precursor knitted fabric 20 of the present embodiment is heated at a temperature equal to or higher than the melting temperature of the thermal bonding yarn 23 and less than the melting point temperature of the remaining yarns 21 and 22 after knitting. As a result, a part of the thermal bonding yarn 23 is partially dissolved. A part of the dissolved portion adheres to the adjacent chain knitting yarn 21 and the insertion yarn 22. By solidifying in this state, the chain knitting yarn 21 and the insertion yarn 22 in contact with the thermal bonding yarn 23 can be prevented from being released from the thermal bonding yarn 23. Further, the yarns 21 and 22 that are in contact with the thermal bonding yarn 23 can be bonded to each other by the thermal bonding yarn 23. As a result, the connected state of each yarn is maintained, and fraying of the yarn can be prevented.

  In this way, the binding of the chain stitch structure is strengthened at the portion where the thermal bonding yarn 23 adheres to another yarn. Specifically, the first loop-shaped portion 24 and the second loop-shaped portion 25 are bonded via the thermal bonding yarn 23. As a result, even if a part of the chain stitch yarn 21 is divided, it is possible to prevent the second loop portion 25 from being released from the first loop portion 24. As a result, the unraveling of the chain knitting yarn 21 is blocked by the bonding portion between the first loop-shaped portion 24 and the second loop-shaped portion 25, and the unraveling of the chain knitting yarn 21 beyond the bonding portion can be prevented. Therefore, the above-described second precursor knitted fabric 20A before breaking of the thermal bonding yarn 23 also has an effect of preventing unraveling. Hereinafter, the fraying prevention effect of the second precursor knitted fabric 20A will be described.

  FIG. 8 is a knitting diagram for explaining prevention of unraveling of the second precursor knitted fabric 20A of the present embodiment, and FIG. 9 is a knitting diagram showing a lace knitted fabric 10A of a comparative example. FIG. 8 shows a second precursor knitted fabric 20A obtained by heating the first precursor knitted fabric 20 in which the thermal bonding yarn 23 is knitted. Moreover, the lace fabric 10A of the comparative example shown in FIG. 9 shows the lace fabric 10A in which the thermal bonding yarn 23 is not knitted.

  As shown in FIG. 9, in the knitted lace fabric 10A of the comparative example, when the two second loop-shaped parts 25 arranged in the course direction C are cut off at the divided parts 40 and 41, the divided part 40 at the rear stage of the course direction C is the front side. As a result, the portion where the chain knitting yarn 21 is locked is cut off, and the chain knitting structure is unwound along the front of the course direction C with respect to the divided portion 40. In the lace fabric 10A of the comparative example, the unraveling of the chain stitch structure proceeds along the front stage in the course direction, reaches the run stop portion 42, and the run stop portion 42 suppresses the unwinding. Therefore, in order to shorten the progress of unwinding, it is necessary to increase the run stop portion 42. When the run stop portions 42 are increased, the number of yarns extending in the wale direction W is increased, and the sense of sheerness of the lace knitted fabric 10A is impaired.

  On the other hand, as shown in FIG. 8, in the second precursor knitted fabric 20A of the present embodiment, the thermal bonding yarn 23 extends in the course direction C. The second loop portion 25 is adhered.

  In the second precursor knitted fabric 20A of the present embodiment, when the two second loop-shaped parts 25 arranged in the course direction C are cut off at the split parts 40 and 41, the split part 40 at the rear stage of the course direction C is on the front side. Even if it is pulled, there is an adhesive portion 44 in which the first loop portion 24 and the second loop portion 25 are bonded at the rear stage of the course direction C rather than the divided part 40 at the rear stage of the course direction C. At 44, unraveling of the chain stitch structure is prevented, and further unraveling is prevented. Therefore, it is possible to prevent the chain stitch structure from being unraveled as compared with the lace fabric 10A of the comparative example. Further, since the unraveling is suppressed by the adhesive portions 43 and 44, the run stop portion 42 can be reduced or eliminated, and the sense of sheer knitting lace can be improved as compared with the comparative example. Further, in the present embodiment, the first loop portion 24 and the second loop portion 25 that are the same in the course direction C are bonded to each course direction C, so that a part of the second loop portion 25 is divided. Even if it is made, it is possible to prevent the wale from being divided in the course direction C. As described above, in the present embodiment, since the thermal bonding yarn 23 is knitted by extending along the wale, the binding in the course direction C can be increased for the chain stitch structure, and the durability can be improved. .

  FIG. 10 is a knitting diagram for explaining fraying of the second precursor knitted fabric 20A of the present embodiment, and FIG. 11 is a knitting diagram showing a lace knitted fabric 10A of a comparative example. FIG. 10 shows a second precursor knitted fabric 20A obtained by heating the first precursor knitted fabric 20 in which the thermal bonding yarn 23 is knitted. Moreover, the lace fabric 10A of the comparative example shown in FIG. 11 shows the lace fabric 10A in which the thermal bonding yarn 23 is not knitted. 10 and 11, the insertion yarn 22 is knitted across a plurality of wales.

  As shown in FIG. 11, in the knitted lace fabric 10A of the comparative example, when the insertion yarn 22 is cut off at the divided portion 45, the wale direction exceeds one or more wales than the divided portion 45 in the insertion yarn 22. When the W one side portion 46 is pulled in the wale direction W one side, the divided portion 45 passes through the wale and the insertion yarn 22 comes out of the lace fabric 10A. For example, since the insertion yarn 22 is prevented from moving by the frictional force with the chain knitting yarn 21, the insertion yarn 22 is displaced from the knitted portion or falls off when a large force is applied. It may end up.

  On the other hand, as shown in FIG. 10, in the second precursor knitted fabric 20A of the present embodiment, the thermal bonding yarns 23 are knitted into each wale 26, so that the insertion yarn 22 is provided in the first loop for each wale. It adheres to the part 24 and the second loop part 25.

  In the second precursor knitted fabric 20A of the present embodiment, when the insertion yarn 22 is cut off at the split portion 45, the wale direction W that exceeds one or more wales than the split portion 45 of the insertion yarn 22 Even if the one-side portion 46 is pulled in one side in the wale direction W, the divided portions 45 may come off the wale 26 by bonding the bonding portions 47 and 48 between the insertion thread 22 and the wale 26. This prevents the insertion yarn 22 from shifting. As described above, in the present embodiment, the insertion yarn 22 is fixed to the chain stitch structure by the adhesive force of the thermal bonding yarn 23, so that the insertion yarn 22 can be prevented from shifting and falling off.

  Further, the wales 26 adjacent to each other in the wale direction W are bonded to each other via the insertion thread 22, thereby preventing the interval between adjacent wales from expanding or narrowing, and the lace pattern of the knitted lace fabric 120. Can be prevented from being disturbed.

  As described above, according to the present embodiment, fraying of each yarn constituting the second precursor knitted fabric 20A can be prevented. Even if the thermal bonding yarn 23 of the second precursor knitted fabric 20A is broken into a plurality of pieces to form the lace knitted fabric 120, the lace knitted fabric 120 further exhibits the fraying prevention effect achieved by the second precursor knitted fabric 20A. improves. As a result, fraying of the yarn caused by the production state such as sewing or cutting of the knitted lace fabric 120 and fraying of the yarn caused by the use state such as wearing or washing can be prevented, and the quality can be improved.

  Further, according to the present embodiment, the thermal bonding yarn 23 is a bare yarn whose surface portion has heat melting property. Therefore, when the first precursor knitted fabric 20 is heated, the portion of the thermal bonding yarn 23 that contacts the chain knitting yarn 21 melts and adheres to the chain knitting yarn 21. Further, the portion of the thermal bonding yarn 23 that contacts the insertion yarn 22 melts and adheres to the insertion yarn 22. As described above, according to the present embodiment, the exposed portion of the thermal bonding yarn 23 that directly contacts the other yarn becomes a portion that adheres to the other yarn, so that the thermal bonding yarn 23 is attached to the other yarn. The adhesion amount to adhere can be increased and the adhesive force can be improved. Therefore, fraying of each yarn can be more reliably prevented.

  Further, by realizing the thermal bonding yarn 23 with a non-coated yarn, that is, a bare yarn that is not covered with a coated yarn, the amount of yarn in the base portion can be further reduced, and the yarn density difference between the base portion and the handle portion is reduced. Can be increased to improve the sense of sheerness of the knitted lace fabric 120, and the pattern can be made clear.

  Further, according to the present embodiment, since the thermal bonding yarn 23 is knitted over the entire region of the chain stitch structure, fraying of the yarn in the entire lace fabric 120 can be prevented. For example, even if the lace knitted fabric 120 is sewn or cut at an arbitrary position, it is possible to prevent the yarn from fraying from the sewn part and the cut part.

  Further, since fraying of the yarn over the entire knitted lace fabric 120 can be prevented, for example, even if the lace knitted fabric 120 of the present embodiment is used as a lace knitted fabric for forming an eyelash lace, fraying of the eyelash-shaped portion is prevented. Can be prevented. Also, a motif cut that cuts the knitted lace fabric 120 at an arbitrary position can prevent fraying of the cut portion, and can be applied to a wide lace. Further, since fraying over the entire knitted lace fabric 120 can be prevented, the knitted lace fabric 120 can also be used for a part of an outerwear that requires durability. As described above, according to the present embodiment, fraying of the yarn can be prevented over the entire knitted lace fabric 120, so that the usage application can be expanded.

  Further, according to the present embodiment, the thermal bonding yarn 23 and the insertion yarn 22 are knitted into the chain stitch structure by inserting between the first loop-shaped portion 24 and the second loop-shaped portion 25. In the knitted lace fabric 120, the surface on the side where the first loop-shaped portion 24 is arranged is the back surface with respect to the insertion yarn 22 knitted into the chain stitch structure, and the opposite surface is the front surface. . In the present embodiment, the insertion yarn 22 is arranged in the front direction Z1 relative to the thermal bonding yarn 23 at a portion where the thermal bonding yarn 23 and the insertion yarn 22 are knitted in common. Accordingly, when the knitted lace fabric 120 is viewed from the front side, the thermal bonding yarn 23 and the first loop-shaped portion 24 are hidden by the insertion yarn 22.

  In this way, the thermal bonding thread 23 can be hidden by the insertion thread 22, and the thermal bonding thread 23 can be made difficult to see from the front surface. As a result, the pattern formed on the knitted lace fabric 120 can be clarified. Even if the thermal bonding yarn 23 is melted, the influence on the pattern viewed from the front surface can be reduced. Further, the thermal bonding yarn 23 passes between the first loop-shaped portion 24 and the insertion yarn 22 so that the first loop-shaped portion 24 and the insertion yarn 22 can be bonded, and the insertion yarn 22 is chain-knitted. It can be prevented from leaving the organization.

  Further, in the present embodiment, in the region where the thermal bonding yarn 23 and the insertion yarn 22 are inserted between the same first loop-shaped portion 24 and the second loop-shaped portion 25, the thermal bonding yarn 23 and the insertion yarn 22 are , Passing through the loop-shaped portion 25 in different directions. In this case, by pulling the knitted lace fabric 120 in the wale direction W, the regions surrounded by the thermal bonding yarn 23 and the insertion yarn 22 are close to each other in the wale direction W, and the thermal bonding yarn 23, the insertion yarn 22, An approaching portion 34 is produced in which the first loop portion 24 and the second loop portion 25 approach each other. By heating the first precursor knitted fabric 20 in a state pulled in the wale direction W in this way, a part of the thermal bonding yarn 23 can be melted at the approaching portion 34, and the thermal bonding yarn 23, the insertion yarn 22, The adhesive force for bonding the first loop-shaped portion 24 and the second loop-shaped portion 25 can be increased.

  In the present embodiment, the fineness of the thermal bonding yarn 23 is set to 10 denier or more and 300 denier or less, and the chain knitting yarn is set to 20 denier or more and 70 denier or less. If the thermal bonding yarn 23 is less than 10 denier, there is a possibility that all of the thermal bonding yarn of the knitted lace may melt, and even if a part of the thermal bonding yarn 23 is melted, There is a risk that the amount of adhesion of will be insufficient. In this case, fraying of the yarn may occur. Further, if the thermal bonding yarn 23 exceeds 300 denier, the difference in density between the base portion and the pattern portion of the thermal bonding yarn 23 is reduced, so that the feeling of knitting lace is lowered and the aesthetic feeling is lowered. End up. Also, the knitted lace becomes stiff. In contrast, in the present embodiment, by setting the fineness of the thermal bonding yarn 23 to 10 denier or more and 300 denier or less, fraying of the yarn can be eliminated and a decrease in aesthetics can be suppressed. Moreover, the thermal bond yarn 23 can further suppress a decrease in aesthetics by being 70 denier or less.

  FIG. 12 is a side view showing a knitting portion of the Raschel knitting machine 60 for knitting the first precursor knitted fabric 20 of the first embodiment. The first precursor knitted fabric 20 can be knitted by, for example, a back jacquard raschel knitting machine. The back jacquard raschel knitting machine 60 (hereinafter simply referred to as the knitting machine 60) has yarn introduction means for introducing the chain knitting yarn 21, the insertion yarn 22, and the thermal bonding yarn 23 toward the knitting position 73 provided in the vicinity of the knitting needle 72. Have. In this embodiment, the yarn introduction means for introducing the thermal bonding yarn 23 toward the knitting position 73 is arranged behind the knitting machine rather than the yarn introduction means for introducing the insertion yarn 22 toward the knitting position 73. . Here, the back of the knitting machine is a direction from the back surface of the knitting needle 72 toward the hook portion.

  Specifically, the yarn introduction means included in the knitting machine is realized by a thermal bonding yarn ridge 61, jacquard bars 62 and 63, a plurality of handle ridges 64, and a ground rod 65. The chain knitting yarn 21 is threaded through the ground yarn 65, the insertion yarn 22 is threaded through the jacquard bars 62, 63, and the thermal bonding yarn 23 is threaded through the thermal bonding yarn rod 61. Further, when pattern yarns, which are yarns for forming a pattern, are knitted into the wale 26, the pattern yarns are passed through a plurality of pattern ridges 64. Hereinafter, a case where a pattern yarn is knitted in addition to the thermal bonding yarn 23 and the insertion yarn 22 will be described.

  Each of the yarn introduction means 61 to 65 is arranged radially toward the knitting position 73 where the knitting needle 72 captures the chain knitting yarn 21, and on the rear side of the knitting machine in the direction in which the knitting needle 72 captures the chain knitting yarn 21. As it goes, it is arranged in the order of the ground rod 65, the plurality of handle rods 64, the jacquard bars 62 and 63, and the thermal bonding yarn rod 61. Therefore, the yarns are arranged on the rear side of the knitting machine from the predetermined knitting position in the order of the chain knitting yarn 21, the plurality of pattern yarns, the insertion yarn 22 and the thermal bonding yarn 23.

  A plurality of knitting needles 72 are formed side by side in a direction perpendicular to the longitudinal direction of the knitting machine, and are fixed to a needle bar 69 serving as a holding means for holding each knitting needle 72. The needle bar 69 moves the knitting needles 72 up and down. Further, the needle bar 69 is operated, and each yarn introduced to each yarn introduction means 61 to 65 is introduced to a predetermined knitting position.

  The respective yarn introduction means 61 to 65 move the respective yarns corresponding to the knitting needles 72 in the space behind the knitting machine in the direction in which the knitting needles 72 are arranged in synchronization with the up and down movement of the knitting needles 72. An overlap (knitting knitting motion) to be performed and an underwrapping (insertion motion) to move each yarn corresponding to the knitting needle 72 in the space in front of the knitting machine in the direction in which the knitting needles 72 are arranged are performed. In addition to these wrapping motions, a so-called swing (swinging motion) that moves in a direction perpendicular to the direction in which the knitting needles 72 are arranged is performed. Specifically, there are two swing operations.

  In the swing-in (back swing) operation that is the first swing operation, each yarn corresponding to the space in front of the knitting machine is moved from the space behind the knitting machine to the knitting needle 72 through the side of the knitting needle 72. . In the swing-out (front swing) operation that is the second swing operation, each yarn corresponding to the space behind the knitting machine moves from the space in front of the knitting machine to the knitting needle 72 through the side of the knitting needle 72. . When the guides attached to the yarn introduction means 61 to 65 are operated, the corresponding yarns pass around the knitting needle 72 according to a predetermined path, and a knitted fabric including the corresponding yarns is formed.

  The knitting unit 73 includes a stitch comb bar 71, a trick plate bar 68 and a tong bar 70. The tong bar 70 has a plurality of tongs corresponding to each knitting needle at the tip. The knitting machine 60 knits the first precursor knitted fabric 20 described above by the operations of the yarn introduction means 61 to 65 and the needle bar 69. Then, the first precursor knitted fabric 20 knitted by the knitting assisting action of the stitch comb bar 71 is auxiliary knitted, passed through the trick plate bar 68, and the first precursor is formed by a winding portion provided in the vicinity of the knitted portion. The knitted fabric 20 is wound up.

  FIG. 13 is a cross-sectional view schematically illustrating the movement of the knitting needle 72 and the ground cloth 66 of the chain knitting portion 26, and the chain knitting yarn 21 of FIG. 13 (1) to FIG. 13 (5) in this order. The knitting work of the chain knitted portion 26 proceeds. In the knitting needle 72, a hook portion 50 for locking the chain knitting yarn 21 is formed at a distal end portion, and a knitting needle stem 51 is formed at a proximal end portion. A tong 52 for opening and closing an opening formed by the hook portion 50 is formed at the tip of the tongue bar 70. The knitting needle 72 and the tongue 52 are formed so as to be individually movable up and down with respect to the ground 65. Using FIG. 13, only the knitting of the wale 26 will be described first, and the insertion yarn 22 and the thermal bonding yarn 23 knitted into the wale 26 will be described later.

  As shown in FIG. 13 (1), the hook portion 50 hooks the new first loop-shaped portion 24j formed by the chain knitting yarn 21 in a state in which the ground hook 65 is disposed in front of the knitting needle 72, and the tongs 52 closes the opening of the hook portion 50. Next, as shown in FIG. 13B, the knitting needle 72 rises toward the ground 65 with respect to the tongue 52. As a result, the opening of the hook portion 50 is opened, and the first loop-shaped portion 24j of the chain knitting yarn 21 hooked by the hook portion 50 comes out of the hook portion 50 and moves to the knitting needle stem 51.

  Next, as shown in FIG. 13 (3), the ground cloth 65 backswings with respect to the knitting needle 72. Next, the ground 65 overlaps and further performs a front swing. As a result, the chain knitting yarn 21 guided to the ground cloth 65 moves so as to wind the knitting needle 72, thereby forming a new first loop-shaped portion 24k. The new first loop portion 24k is hooked by the hook portion 50. Next, as shown in FIG. 13 (4), the tongue 52 rises toward the hook portion 50 and closes the opening of the hook portion 50. At this time, the knitting needle 72 is formed with an old first loop-shaped portion 24j formed on the knitting needle stem 51 and a new first loop-shaped portion 24k to which the hook portion 50 is locked.

  Next, as shown in FIG. 13 (5), when the knitting needle 72 and the tongue 52 are lowered, the old first loop-shaped portion 24j pulls out the knitting needle 72 and moves to the trick plate 53 side. Then, in a state in which the ground hook 65 is disposed in front of the knitting needle 72, the hook portion 50 hooks the new first loop-shaped portion 24k formed by the chain knitting yarn 21, and the state is almost the same as FIG. . Then, by repeating the operation cycle shown in FIG. 13 (1) to FIG. 13 (5), the first loop-shaped portion 24 is sequentially formed and the first loop-shaped portions 24j and 24k are connected to each other. A wale 26 is formed in which two loop portions 25j are sequentially formed. In the present embodiment, the plurality of whales 26 are connected in the course direction C by appropriately underwrapping the ground 65. While performing the knitting operation of the wale 26, the first precursor knitted fabric 20 of the present embodiment can be knitted by knitting insertion yarns such as the insertion yarn 22 and the thermal bonding yarn 23 into the wale 26. it can.

  FIG. 14 is a cross-sectional view schematically illustrating the movement of the jacquard bar 62 and the thermal bonding yarn hook 61, and the operation proceeds in the order of FIGS. 14 (1) to 14 (3). 14 (1) corresponds to FIG. 13 (3), FIG. 14 (2) corresponds to FIG. 13 (4), and FIG. 14 (3) corresponds to FIG. 13 (5), respectively. FIG. As described above, in the knitting machine 60, the jacquard bars 62 and 63 are arranged behind the knitting machine rather than the ground cloth 65 for introducing the chain knitting yarn. Further, a thermal bonding yarn ridge 61 serving as a thermal bonding yarn ridge is arranged behind the knitting machine rather than the jacquard bars 62 and 63.

  As shown in FIGS. 14 (1) and 14 (3), the jacquard bar 62 and the heat-bonding yarn scissors 61 are also attached to the knitting needles 72 when the ground scissors 66 are arranged behind the knitting machine 72 with respect to the knitting needles 72. On the other hand, it is arranged behind the knitting machine. Further, as shown in FIG. 14 (2), in a state where the ground bar 66 is arranged in front of the knitting machine with respect to the knitting needle 72, the jacquard bar 62 and the thermal bonding yarn barb 61 are also arranged in front of the knitting needle 72. .

  Further, as shown in FIG. 14B, the jacquard bar 62 and the thermal bonding yarn ridge 61 are under-wrapped in the state where the ground ridge 66 is backswinged, thereby introducing the thermal bonding yarn 23 and the jacquard yarn. 22 straddles the chain stitch yarn 21. In this state, when a new loop is formed with the chain stitch yarn 21, the thermal bonding yarn 23 and the insertion yarn 22 are knitted into the loop. In this way, the thermal bonding yarn ridge 61 and the jacquard bar 62 operate in synchronization with the swing operation of the ground ridge 66.

  The jacquard bar 62 is arranged in front of the knitting machine with respect to the heat-bonding yarn collar 61. Thereby, when the thermal bonding yarn 23 and the insertion yarn 22 are knitted into the chain knitting portion 26 formed by the ground 66, the thermal bonding yarn 23 guided to the knitting position is guided to the knitting position. The insertion yarn 22 is arranged behind the knitting machine, and the insertion yarn 22 is positioned on the surface side of the first precursor knitted fabric 20 with respect to the thermal bonding yarn 23.

  FIG. 15 is a structure diagram schematically showing the S region in FIG. 3, FIG. 15 (1) shows a structure diagram of the chain knitting yarn 21, and FIG. 15 (2) shows a structure diagram of the thermal bonding yarn 23. .

  For example, the knitting needle 72 at an arbitrary position is the first knitting needle 72a, the knitting needle 72 adjacent to the first knitting needle 72a on one side in the wale direction W is the second knitting needle 72b, and the knitting needle 72b is one side in the wale direction W. Let the knitting needle 72 adjacent to the side be the 3rd knitting needle 72c. The distance between the first knitting needle 72a and the first knitting needle 72a is the distance between the first knitting needle 72a and the second knitting needle 72b. Is the second knitting needle distance L2, and the interval between the second knitting needle 72b and the third knitting needle 72c is the third knitting needle distance L3, and is arranged on one side in the wale direction W with respect to the third knitting needle 72c and the third knitting needle 72c. The distance between the knitting needles 72 is the fourth knitting needle distance L4.

  The ground cloth 65 for introducing each chain knitting yarn 21 performs the same knitting operation on each chain knitting yarn 21. In the first course C1, the description will be focused on the chain knitting yarn guide for hooking the chain knitting yarn 21 onto the second knitting needle 72b, and the description of the remaining chain knitting yarn guide will be omitted.

  As shown in FIG. 15 (1), in the first course C1, the chain knitting yarn guide of interest backswings between the third knitting needles L3, overlaps and front swings through the second knitting needles L2. In the second course C2, the chain knitting yarn guide of interest backswings between the second knitting needles L2, overlaps, and front swings through the second knitting needles L2.

  In the third course C3, the chain knitting yarn guide of interest underlaps the fourth knitting needle interval L4, backswings the fourth knitting needle interval L4, overlaps, and front swings through the third knitting needle interval L3. In the fourth course C4, the chain knitting yarn guide of interest performs a back swing through the third inter-knitting needle L3, overlaps, and performs a front swing through the fourth inter-knitting needle L4. In the fifth course C5, the chain knitting yarn guide of interest backswings the fourth inter-knitting needle L4, overlaps, and front swings through the third inter-knitting needle L3.

  The sixth course C6 performs the same operation as the fourth course C4, and the seventh course C7 performs the same operation as the fifth course C5. In the eighth course C8, the chain knitting yarn guide of interest underlaps the fourth inter-knitting needle L4, backswings the fourth inter-knitting needle L4, overlaps, and front swings through the third inter-knitting needle L3. In the ninth course C9, the chain knitting yarn guide of interest underlaps the second knitting needle interval L2, backswings the second knitting needle interval L2, overlaps, and front swings through the third knitting needle interval L3.

  In this way, the ground cloth 65 repeatedly performs the operation of hooking the predetermined chain knitting yarn 21 on each knitting needle 72 in each course using the guide provided for each chain knitting yarn 21. Thereby, the chain knitting portion 26 extending in a chain shape can be formed. In the present embodiment, the knitting machine 60 appropriately underwraps the chain knitting yarn 21 on the knitting needle 72 in each course. As a result, the second loop-shaped portion 25 can be swung to the one side in the wale direction W and the other side in the wale direction W, and the chain 26 having a fraying preventing function can be formed by connecting the wales 26 adjacent to the wale direction W. Can be formed.

  The thermal bonding yarn 23 performs a swing operation in synchronization with the ground 65 by the thermal bonding yarn hook 61. The thermal bonding yarn ridge 61 that guides each thermal bonding yarn 23 performs the same knitting operation on each thermal bonding yarn 23. In the first course C1, the thermal bonding yarn guide for positioning the thermal bonding yarn 23 between the second knitting needles L3 will be described with attention, and the description of the remaining thermal bonding yarn guide will be omitted.

  As shown in FIG. 15 (2), in the first course C1, the thermal bonding yarn guide of interest reaches the third knitting needle interval L3 by underlapping the second knitting needle interval L2. In the second course C2, the third knitting needle interval L3 is under-wrapped and reaches the second knitting needle interval L2. The thermal bonding yarn guide of interest repeats the operations of the first course C1 and the second course in order from the second course C2. As described above, the thermal bonding yarn 23 reciprocates between the two adjacent knitting needles by the thermal bonding yarn 61 in synchronism with the swinging movement of the ground 65.

  For the insertion yarn other than the thermal bonding yarn, for example, the insertion yarn 22, the jacquard bar 62 repeats the underlap for a predetermined distance and direction at a predetermined position in synchronization with the swinging motion of the ground 65. Similarly, with respect to the handle yarn, the handle rod 64 repeats the underlap for a predetermined distance and direction at a predetermined position in synchronization with the swing operation of the ground rod 65.

  Thus, the knitted lace fabric portion formed in the S region is formed by the knitting operation of the heat-bonding yarn ridge 61, the jacquard bars 62 and 63, the plurality of handle ridges 64, the ground rod 65, and the knitting needle 72. Can do. The knitting machine 60 is arranged in the order of the ground hook 65, the insertion yarn hooks 62 and 63, and the thermal bonding yarn hook 61 in the order toward the rear of the knitting machine, so that the insertion yarn 22 is positioned more than the thermal bonding yarn 23. The first precursor knitted fabric 20 can be disposed on the front side of the first precursor knitted fabric 20, and the first precursor knitted fabric 20 of the present embodiment shown in FIG. 2 can be formed.

  FIG. 16 is a flowchart showing the manufacturing procedure of the knitted lace product. First, when the pattern of the knitted lace to be knitted is determined in step s0, the process proceeds to step s1. In step s1, a chain knitting yarn 21, an insertion yarn 22, a thermal bonding yarn 23, and a pattern yarn are prepared, and an operation program for each yarn introduction means of the knitting machine 60 is input so that the pattern determined in step s0 is obtained. Next, the knitting machine 60 is operated. Accordingly, the first precursor knitted fabric 20 having a desired pattern can be knitted. When the knitting work of the first precursor knitted fabric 20 is completed, the process proceeds to step s2.

  In step s2, the first precursor knitted fabric 20 knitted in step s1 is dyed. When the dyeing is completed, the process proceeds to step s3. In step s3, in order to prepare the first precursor knitted fabric 20, the first precursor knitted fabric 20 is heated to a predetermined temperature. At this time, the first precursor knitted fabric 20 is heated while being pulled in the wale direction W. As a result, the knitted fabric is prepared, and a part of the thermal bonding yarn 23 described above melts and adheres to other adjacent yarns. The first precursor knitted fabric 20 is heated at a predetermined temperature for a predetermined time, and the process proceeds to step s4. In the present embodiment, the knitted lace fabric 120 is manufactured by maintaining the temperature at 180 ° C. to 195 ° C. for 60 seconds. In the lace knitted fabric 120, since the first precursor knitted fabric 20 is heated, a part of the thermal bonding yarn 23 is fixed to another yarn. Further, since the knitted lace fabric 120 is pulled compared to after the step s2, the thermal bonding yarn 23 is divided into a plurality of pieces.

  In step s4, the knitted lace fabric 120 is cut and the knitted lace fabric 20 is sewn to manufacture a knitted lace product. When the knitted lace product is manufactured, the process proceeds to step s5 and the operation is finished.

  At the time of the cutting and sewing process in step s5, since a part of the thermal bonding yarn 23 is fixed to another yarn, the binding of the chain stitch structure is strengthened. Accordingly, the yarns are prevented from fraying at the time of cutting or sewing, and the yield of the manufactured knitted lace product can be improved and the quality can be improved. In addition, since the knitted lace product produced has a stronger chain stitch structure, fraying due to use such as wearing or washing can be suppressed, and the durability of the knitted lace product can be improved.

  Further, in the heating process shown in step s3, the insertion yarn 22 and the thermal bonding yarn 23 are brought close to the loop-shaped portions 24 and 25 by heating the first precursor knitted fabric 20 in a state of being pulled in the wale direction W. become. As a result, the loop-like portions 24 and 25 and the insertion yarn 22 can be firmly bonded by the thermal bonding yarn 23.

  FIG. 17 is a knitting structure diagram schematically showing a part of the first precursor knitted fabric 20B according to the second embodiment of the present invention. The first precursor knitted fabric 20B of the second embodiment differs from the first precursor knitted fabric 20 of the first embodiment in the direction in which the thermal bonding yarn 23 passes through the second loop-shaped portion 25, and has other configurations. The same applies to. Therefore, about the structure similar to the 1st precursor knitted fabric 20 of 1st Embodiment, the same referential mark is attached | subjected and description is abbreviate | omitted.

  In the present embodiment, the thermal bonding yarn 23 passes through the second loop portion 25 in the same direction as the insertion yarn 22, and is inserted between the first loop portion 24 and the insertion yarn 22. Specifically, the thermal bonding yarn 23 and the insertion yarn 22 are provided with a first loop-shaped portion of interest from a side opposite to the side where the first loop-shaped portion 24a of interest is continuous with the second loop-like portion 25b of the preceding stage C1 in the course direction. It passes through a second loop-shaped portion 25a that is the same as the course direction of 24a.

  In this way, the thermal bonding yarn 23 passes through the second loop-shaped portion 25 in the same direction as the insertion yarn 22, so that the contact portion between the insertion yarn 22 and the thermal bonding yarn 23 can be increased. The adhesive force for adhering the insertion thread 22 can be improved. As a result, fraying of the insertion thread 22 can be prevented more reliably.

  As another embodiment, the thermal bonding yarn 23 and the insertion yarn 22 are provided with a first loop-shaped portion 24a of interest from the side where the first loop-shaped portion 24a of interest is continuous with the second loop-shaped portion 25b of the preceding stage in the course direction C. And the course direction C is also included in the present invention when passing through the second loop-shaped portion 25a in the same stage.

  Further, the thermal bonding yarn 23 has a second loop in the same step as the first loop-shaped portion 24a and the course direction C from the side where the first loop-shaped portion 24a of interest is continuous with the second loop-shaped portion 25b in the preceding stage of the course direction C. The insertion thread 22 passes through the first loop-shaped portion 24a from the side opposite to the side where the first loop-shaped portion 24a of interest is continuous with the second loop-shaped portion 25b of the preceding stage in the course direction C. A case of passing through the second loop-like portion 25a of the same stage in the direction C is also included in the present invention.

  FIG. 18 is a knitting structure diagram schematically showing a part of the first precursor knitted fabric 20D according to the third embodiment of the present invention. FIG. 19 is a knitting structure diagram schematically showing the first precursor knitted fabric 20D by omitting yarns other than the chain knitting yarn 21, the thermal bonding yarn 23, and the stretch yarn 27. The first precursor knitted fabric 20D of the third embodiment is further knitted with a stretchable yarn 27 having elasticity, in addition to the thermal bonding yarn 23, compared to the first precursor knitted fabric 20B of the second embodiment. The other configurations are the same. Therefore, about the structure similar to the 1st precursor knitted fabric 20 of 1st Embodiment, the same referential mark is attached | subjected and description is abbreviate | omitted.

  In the first precursor knitted fabric 20D of the third embodiment, the first precursor knitted fabric 20D after knitting contracts by the stretch yarn 27 being knitted separately from the thermal bonding yarn 23. Thereby, stretchability can be given to the first precursor knitted fabric 20D. For example, polyurethane elastic yarn, so-called spandex, is used as the stretch yarn.

  The stretchable thread 27 extends from the insertion thread 22 on the first loop portion 24 side. The stretchable yarn 27 and the thermal bonding yarn 23 pass through the second loop-shaped portion 25 in the intersecting direction and are knitted into the chain stitch structure. In other words, the thermal bonding yarn 23 extends and is knitted in a direction different from the stretchable yarn 27. The stretchable yarn 27 is knitted into each wale and passes zigzag as it advances in the course direction C along each wale.

  In the present embodiment, the stretchable thread 27 has the same step in the course direction as the first loop portion 24a of interest from the side where the first loop portion 24a of interest is continuous with the second loop portion 25b of the preceding stage in the course direction C. It passes through the second loop portion 25a. Further, the insertion yarn 22 and the thermal bonding yarn 23 are arranged so that the first loop-shaped portion 24a of interest and the direction of the first loop-shaped portion 24a of interest from the side opposite to the side where the first loop-shaped portion 24a of interest is continuous with the second loop-shaped portion 25b of the preceding stage in the course direction C C Passes through the second loop-shaped portion 25a of the same stage. Therefore, the stretchable yarn 27 intersects the thermal bond yarn 23 and the insertion yarn 22 at a portion where the stretchable yarn 27, the thermal bonding yarn 23 and the insertion yarn 22 all pass through the same loop.

  Even when the stretchable yarn 27 is knitted into the first precursor knitted fabric 20D as in the third embodiment, the same effect as in the first embodiment can be obtained. That is, the thermal bonding yarn 23 can prevent fraying of each yarn by bonding other yarns. Further, the thermal bonding yarn 23 bonds the stretchable yarn 27 and the chain stitch yarn 21, thereby preventing the so-called span loss that the stretchable yarn 27 comes off from the chain stitch structure.

  In the third embodiment, by pulling the first precursor knitted fabric 20D in the wale direction W, regions surrounded by the stretch yarn 27 and the insertion yarn 22 are close to each other in the wale direction W, and the thermal bonding yarn 23 Thus, an insertion portion 22, an elastic yarn 27, an approach portion 34 where the first loop portion 24 and the second loop portion 25 approach each other is generated. By heating the first precursor knitted fabric 20D while being pulled in the wale direction W in this way, a part of the thermal bonding yarn 23 can be melted at the approaching portion 34, and the thermal bonding yarn 23, the stretch yarn 27, Adhesive force for bonding the insertion thread 22, the first loop-shaped portion 24, and the second loop-shaped portion 25 can be increased.

  In the present embodiment, the insertion yarn 22 and the thermal bonding yarn 23 extend in the same direction, so that the contact portion where the thermal bonding yarn 23 contacts the insertion yarn 22 can be increased, and the insertion yarn 22 can be more easily removed. It can be surely prevented. Further, since the thermal bonding yarn 23 and the stretchable yarn 27 cross each other, the thermal bonding yarn 23 is bonded to the stretchable yarn 27, and the restraining portion that restrains the stretchable yarn 27 can be reduced. Accordingly, it is possible to prevent the span from being lost while suppressing a decrease in the stretchability of the knitted lace fabric.

  In the present embodiment, in the first precursor knitted fabric 20, both the thermal bonding yarn 23 and the stretch yarn 27 are knitted into the chain knitting yarn 21. The direction of insertion between the first loop portion and the second loop portion is different.

  As a result, the amount of contact between the stretchable yarn 27 and the thermal bonding yarn 23 can be reduced, the thermal bonding yarn 23 melted in the heating process can be easily attached to the chain stitch yarn 21, and the lace fabric 20 In this case, it is possible to easily form the fused portion 100 in the chain stitch yarn 21.

  The thermal bonding yarn 23 and the stretchable yarn 27 may be similar materials of polyurethane, and the chain stitch yarn 21 may be a different material from the thermal bonding yarn 23 such as nylon (polyamide synthetic fiber). In this case, the thermal bonding yarn 23 is difficult to dissociate when attached to the stretchable yarn 27 made of the same material, but easily dissociated when attached to the chain stitch yarn 21 made of a different material.

  In this case, when the thermal bonding yarn 23 adheres to both the stretch yarn 27 and the chain knitting yarn 21, it becomes easy to dissociate from the chain knitting yarn 21. In this embodiment, since it is possible to prevent the thermal bonding yarn 23 from adhering to both the stretch yarn 27 and the chain knitting yarn 21, the possibility of the thermal bonding yarn 23 dissociating from the chain knitting yarn 21 is reduced. It is possible to make the fused portion 100 remain on the chain knitting yarn 21 easily.

  FIG. 20 is a knitting structure diagram schematically showing a part of the first precursor knitted fabric 20E according to the fourth embodiment of the present invention. The first precursor knitted fabric 20E of the fourth embodiment differs from the first precursor knitted fabric 20D of the third embodiment in the direction in which the stretchable yarn 27 extends, and the other configurations are the same. In the present embodiment, the stretchable yarn 27 has a first loop-shaped portion 24a of interest and the course direction from the side opposite to the side where the first loop-shaped portion 24a of interest is continuous with the second loop-shaped portion 25b of the preceding stage in the course direction C. C Passes through the second loop-shaped portion 25a of the same stage. Therefore, when the stretchable thread 27, the insertion thread 22 and the thermal bonding thread 23 all pass through the same second loop-shaped portion 25, they pass in the same direction. In the portion where the stretchable yarn 27, the insertion yarn 22 and the contact bonding yarn 23 all pass through the same second loop-shaped portion, the respective yarns 22, 23 and 27 are located in close proximity. Therefore, when the thermal bonding yarn 23 is melted, the adhesive force between the insertion yarn 22 and the stretchable yarn 27 can be increased.

  FIG. 21 is a side view showing a knitting portion of a back jacquard raschel knitting machine 60C for knitting the first precursor knitted fabrics 20D, 20E of the third and fourth embodiments. In the knitting machine 60, an elastic yarn hook 66 serving as a yarn introduction means for introducing the elastic yarn 27 toward the knitting position 73 is disposed between the jacquard bar 62 and the thermal bonding yarn bar 61. Other configurations are the same as those of the knitting machine shown in FIG.

  By arranging the elastic yarn hook 66 and the thermal bonding yarn rod 61 in this way, the elastic yarn hook 66 and the thermal bonding yarn rod 61 are arranged behind the insertion yarn 22. Thereby, when the lace knitted fabric 20 is viewed from the front side, the stretch yarn 27 and the thermal bonding yarn 23 are hidden by the insertion yarn 22. As a result, the pattern of the lace fabric can be clarified. Further, the first precursor knitted fabrics 20D and 20E shown in the third and fourth embodiments are knitted by making the operations of the jacquard bars 62 and 63, the elastic yarn hook 66 and the thermal bonding yarn hook 61 different. Can do. In addition, the front and rear sides of the elastic yarn folds and the thermal bonding yarn folds may be reversed. In this case, in the knitted lace fabric of the third and fourth embodiments, the stretchable yarn and the thermal bonding yarn are upside down. Even when the upper and lower sides of the stretchable yarn and the thermal bonding yarn are interchanged, they are included in the present invention. In addition to the above-mentioned back jacquard knitting machine, the lace knitted fabric knitted by the front jacquard knitting machine in which the jacquard bars 62 and 63 are arranged in front of the knitting machine with respect to the pattern yarn is also knitted by the thermal bonding yarn 23 If included, it is included in the present invention.

  FIG. 22 is a knitting structure diagram schematically showing a part of the first precursor knitted fabric 20F according to the fifth embodiment of the present invention. The thermal bonding yarn 23 is preferably arranged on the back side rather than the insertion yarn 22, but the case where the thermal bonding yarn 23 is knitted on the front side rather than the insertion yarn 22 as shown in FIG. 22 is also included in the present invention. FIG. 23 is a side view showing a knitting portion of a back jacquard raschel knitting machine 60F for knitting the first precursor knitted fabric 20F of the fifth embodiment. In the knitting machine 60, a thermal bonding yarn ridge 61 is arranged in front of the knitting machine with respect to the jacquard bar 62. Other configurations are the same as those of the knitting machine shown in FIG.

  As described above, even in the first precursor knitted fabrics 20B and 20D to 20F of the second to fifth embodiments, the same effects as those of the first embodiment can be obtained by performing the heating step and the breaking step after the knitting step. Obtainable. The above-described embodiment of the present invention is merely an example of the invention, and the configuration can be changed within the scope of the invention. For example, in the present embodiment, the thermal bonding yarn 23 and the insertion yarn 22 are knitted into a chain stitch structure having a fray prevention function, but the base knitted fabric only needs to be formed in a chain stitch. It is not limited to the chain stitch structure. For example, the same effect can be obtained even if the second loop-shaped portion of the chain knitting yarn 21 is a chain knitting structure in which the second loop-shaped part does not swing, that is, a chain knitting structure having no fraying prevention effect. In addition to the basic chain stitch structure, the base knitted fabric may be a tulle knitted fabric or a power net structure. By forming the power net structure, it is possible to form a clear pattern with elasticity in multiple directions. Further, the knitted fabric as a basis may be a wide lace (all over lace) and a narrow lace.

  In addition, the knitted lace fabric knitted by the knitting machine of the present embodiment has elasticity by spandex being knitted into a chain stitch structure. The present invention is not limited to this. That is, the knitting machine of another embodiment of the present invention includes a knitted lace fabric knitted by a knitting machine that does not knit spandex. In this case, the lace knitted fabric has almost no elasticity and is a so-called rigid lace knitted fabric. Further, the thermal bonding yarn 23 may be one having low elasticity or not having elasticity. The thermal bonding yarn 23 may be made of a material other than the materials described above as long as it can be broken after welding.

  In the present embodiment, the insertion yarn may be a handle yarn or a floating yarn. Further, the thermal bonding yarn 23 does not need to be knitted in all the chain knitted portions, and may be knitted in the chain knitted portions at intervals in the wale direction W and the course direction C. As described above, the lace knitted fabric structure shown in the above-described embodiment is merely an example, and the knitted fabric structure as a foundation, the knitting method of each insertion yarn, the chain knitting yarn, and the types of each insertion yarn are appropriately selected. It is possible to change. The thermal bonding yarn 23 is an uncoated yarn, but may be realized by a covering yarn composed of a core yarn and a coated yarn.

In any of the above-described embodiments, the following correspondences (1) to (7) are possible.
(1) A lace knitted fabric having a chain stitch structure in which a plurality of loop-shaped portions are formed by a chain stitch yarn, and a thermal bonding yarn having a melting temperature lower than that of the chain stitch yarn is knitted into the chain stitch structure A pattern in which the yarn is dense, the base portion is sparse, the chain is knitted, and the thermal bonding yarn and the insertion yarn for forming the pattern are knitted in the chain stitch structure. A knitted lace fabric characterized by including a part.

  A pattern portion having a dense amount of yarn per unit area and a base portion having a loose amount of yarn per unit area are provided. By combining the pattern portion and the base portion, the knitted fabric can be contrasted by the density difference of the yarn, and the lace knitted fabric having the pattern can be formed. By heating the lace knitted fabric to a temperature lower than the melting temperature of the chain knitting yarn and higher than the melting temperature of the thermal bonding yarn, a part of the thermal bonding yarn is partially dissolved. A part of the dissolved portion adheres to the chain stitch yarn and the insertion yarn. By solidifying in this state, it is possible to prevent the chain knitting yarn and the insertion yarn in contact with the thermal bonding yarn from being released from the thermal bonding yarn in the knitted lace manufactured using the knitted lace fabric. Further, the yarns in contact with the thermal bonding yarn can be bonded to each other by the thermal bonding yarn. As a result, the connected state of each yarn is maintained, and fraying of the yarn can be prevented.

  The binding of the chain stitch structure is strengthened at the adhesion portion where the heat bonding yarn adheres to other yarns. Even if a part of the chain stitch yarn constituting the chain stitch structure is cut off by this, the unraveling of the chain stitch structure is prevented at the adhered portion, and the chain stitch structure is prevented from being unraveled beyond the adhered portion. it can. Further, since a part of the thermal bonding yarn adheres to the portion where the insertion yarn and the chain stitch yarn intersect, it is possible to prevent the insertion yarn from shifting or separating from the chain stitch structure. Further, when the thermal bonding yarn extends over two adjacent chain knitting yarns, the two adjacent chain knitting yarns are prevented from separating from each other by bonding the insertion yarn to each chain knitting yarn via the thermal bonding yarn. Can be removed.

  In this way, fraying of each yarn can be prevented in the knitted lace produced by heating the knitted lace fabric. For example, it is possible to prevent fraying of yarn caused by a manufacturing state such as sewing or cutting of a knitted lace, and fraying of yarn caused by a use state such as wearing or washing, and quality can be improved. Further, since the chain knitting structure is achieved with yarns other than the thermal bonding yarn, the shape of the entire knitted lace can be stabilized by using a yarn having heat resistance as the chain knitting yarn.

  For example, when forming a chain stitch structure using a thermal bonding yarn, in order to leave the chain stitch structure even after heating, the thermal bonding yarn must be thickened, and the yarn constituting the base portion increases, and the base portion The density difference between the thread and the handle becomes small.

  On the other hand, by forming a chain stitch structure using a chain stitch yarn different from the thermal bond yarn, it is not necessary to thicken the thermal bond yarn in order to leave the chain stitch structure. Can be made thinner. As a result, the amount per unit volume of the yarn constituting the base portion can be reduced, and the density difference between the base portion and the handle portion can be increased. As a result, the sense of sheer knitting lace can be improved and the pattern can be made clear. In addition, the amount of fusion of the thermal bonding yarn can be reduced, and the influence of the melted portion on the entire knitted lace can be reduced to prevent the pattern from being damaged. Further, since the chain knitting yarn can be made thin, the knitted lace can be made soft, in other words, easily deformed. Thereby, for example, knitted lace can be suitably used as a fabric such as underwear.

  (2) The knitted lace fabric characterized in that the thermal bonding yarn extends along a course direction in which a plurality of loop-shaped portions are formed continuously and is knitted into a chain stitch structure.

  Since the heat-bonding yarn extends along the course and is knitted into the chain stitch structure, the binding in the knitting direction can be increased for the chain stitch structure. As a result, it is possible to reduce the horizontal swinging portion of the chain stitch yarn formed to prevent the chain stitch structure from fraying, that is, the run stop portion. In this way, the lace knitted fabric can be reduced in the number of run stop portions formed on the heated knitted lace, so that the yarn can be prevented from undesirably extending between adjacent wales, further improving the aesthetics. can do.

  (3) The knitted lace fabric, wherein the thermal bonding yarn is a bare yarn having a heat melting property on a surface portion.

  The thermal bonding yarn is a bare yarn having a surface portion having a heat melting property. Accordingly, when the lace knitted fabric is heated, the portion of the thermal bonding yarn that contacts the chain knitting yarn melts and adheres to the chain knitting yarn. Further, a portion of the thermal bonding yarn that contacts the insertion yarn melts and adheres to the insertion yarn.

  Thus, in the thermal bonding yarn, the exposed portion that comes into contact with the other yarn becomes a portion that adheres to the other yarn, so the amount of adhesion of the thermal bonding yarn to the other yarn can be increased, Adhesive force can be improved. Therefore, fraying of each yarn can be more reliably prevented. In addition, by realizing thermal bonding yarn with uncoated yarn, i.e. bare yarn not covered with coated yarn, the amount of yarn in the base part can be further reduced, and the density difference between the base part and the pattern part can be reduced. By increasing the size, the sense of sheer knitting can be improved, and the pattern can be made clear.

  (4) A lace knitted fabric in which a thermal bonding yarn is knitted over the entire region of the chain stitch structure.

  Since the thermal bonding yarn is knitted over the entire region of the chain stitch structure, fraying of the yarn in the entire knitted lace can be prevented. For example, even if the knitted lace is sewn or cut at an arbitrary position, it is possible to prevent the yarn from fraying from the sewing portion and the cutting portion. Thus, fraying of the yarn can be prevented over the entire knitted lace, so that the usage can be expanded. For example, fraying over the entire knitted lace can be prevented, so that the knitted lace can also be used for a part of the outerwear requiring durability.

  (5) In the chain stitch portion, the first loop portion and the second loop portion are alternately arranged in a plurality of stages in the course direction, and the second loop portion of interest is the direction of the second loop portion. A first loop-like portion extending through the first loop-like portion in the front stage and extending toward the rear stage in the course direction, and a first loop-like portion in the same stage in the course direction as the second loop-like portion is passed through. The insertion thread is inserted between the first loop-shaped part and the second loop-shaped part at the part where the heat-bonding thread and the insertion thread are knitted together. The knitted lace fabric is characterized in that the thermal bonding yarn is inserted between the insertion yarn and the first loop portion.

  The thermal bonding yarn and the insertion yarn are knitted into the chain stitch structure by inserting between the first loop-shaped portion and the second loop-shaped portion. In the knitted lace fabric, the surface on the side where the first loop-shaped portion is arranged is the back surface with respect to the insertion yarn knitted into the chain stitch structure, and the opposite surface is the front surface. In the portion where the thermal bonding yarn and the insertion yarn are knitted in common, the insertion yarn is disposed on the front side of the thermal bonding yarn. Therefore, when the lace knitted fabric is viewed from the front side, the thermal bonding yarn and the first loop-shaped portion are hidden by the insertion yarn.

  The thermal bonding yarn can be hidden by the insertion yarn, and the thermal bonding yarn can be hardly seen from the front surface. This makes it possible to clarify the pattern formed on the knitted lace formed by heating the knitted lace fabric. Even if the heat-bonding yarn is melted, the influence on the pattern viewed from the front surface can be reduced. The thermal bonding yarn passes between the first loop-shaped portion and the insertion yarn, whereby the first loop-shaped portion and the insertion yarn can be bonded, and the insertion yarn is detached from the chain stitch structure. Can be prevented.

  (6) A knitted lace fabric characterized in that the chain knitted structure has portions where a thermal bonding yarn and a stretchable elastic yarn are knitted into the chain knitted structure.

  Stretchability can be imparted to the knitted lace by the stretchable yarn having stretchability being knitted into the chain knitted structure in an expanded state. Further, by heating such a knitted lace after knitting, a part of the thermal bonding yarn adheres to the stretchable yarn at a portion where the thermal bonding yarn and the stretchable yarn are in contact with each other. This prevents the stretch yarn from coming out of the chain stitch structure. Thereby, for example, it is possible to prevent the elastic yarn from coming out of the sewing portion.

  In this way, by knitting the thermal bonding yarn into the chain stitch structure, fraying of the yarn can be prevented even for the knitted lace having elasticity. Moreover, even if the knitted lace repeatedly expands and contracts after knitting, the yarns are prevented from shifting due to the thermal bonding yarn. As a result, the pattern of the knitted lace at the time of expansion / contraction can be prevented from greatly differing from the pattern of the knitted lace before the expansion / contraction, and the aesthetic sense of the knitting lace can be maintained for a long time.

(7) Knitted lace manufactured by the above-mentioned lace fabric.
By heating the lace knitted fabric described above, a part of the thermal bonding yarn included in the lace knitted fabric is melted and the binding of the yarns is strengthened. Therefore, fraying about the knitted lace formed using the knitted lace fabric can be prevented. Further, by forming a chain stitch structure using a chain stitch yarn different from the thermal bond yarn, it is not necessary to thicken the thermal bond yarn in order to leave the chain stitch structure, and the thermal bond yarn and the chain stitch yarn are made thin. Therefore, the amount per unit volume of the yarn constituting the base portion can be reduced to increase the density difference between the base portion and the handle portion.

  Thus, by producing a knitted lace using the above-described lace knitted fabric, fraying of the yarn can be prevented, and the density difference of the yarn between the base portion and the handle portion can be increased, and the knitted lace It is possible to improve the sense of sheerness, to clarify the pattern, and to suppress a decrease in aesthetics.

1 is a knitting organization diagram schematically showing a part of a lace fabric 120 according to a first embodiment of the present invention. 2 is a knitting structure diagram schematically showing a part of a first precursor knitted fabric 20 that is a precursor of a lace knitted fabric 120. FIG. FIG. 3 is a knitting structure diagram schematically showing the first precursor knitted fabric 20 with yarns other than the chain knitting yarn 21 and the thermal bonding yarn 23 omitted. It is a flowchart which shows the manufacturing process of the lace fabric 120 of this embodiment. It is a figure for demonstrating that the fusion | melting part 100 becomes a resistance body resisting unraveling. It is a figure for demonstrating that the fusion | melting part 100 becomes a resistance body resisting unraveling. It is a flowchart which shows the other manufacturing process of the lace fabric 120. It is a knitting diagram for explaining the prevention of unraveling of the second precursor knitted fabric 20A of the present embodiment. It is a knitting diagram showing a lace fabric 10A of a comparative example. It is a knitting diagram for explaining fraying of the second precursor knitted fabric 20A of the present embodiment. It is a knitting diagram showing a lace fabric 10A of a comparative example. It is a side view which shows the knitting part of the Raschel knitting machine 60 for knitting the 1st precursor knitted fabric 20 of 1st Embodiment. FIG. 6 is a cross-sectional view schematically illustrating the movement of the knitting needle 72 and the ground hook 66 of the chain knitting portion 26. It is sectional drawing shown typically in order to demonstrate the motion of the jacquard bar 62 and the heat-bonding thread | yarn 61. FIG. FIG. 4 is an organization chart schematically showing an S region in FIG. 3. It is a flowchart which shows the manufacture procedure of a knitted lace product. It is the knitting | organization organization chart which shows typically a part of 1st precursor knitted fabric 20B which is 2nd Embodiment of this invention. It is the knitting | organization organization chart which shows typically a part of 1st precursor knitted fabric 20D which is 3rd Embodiment of this invention. FIG. 3 is a knitting structure diagram schematically showing the first precursor knitted fabric 20D by omitting yarns other than the chain knitting yarn 21, the thermal bonding yarn 23, and the stretch yarn 27. It is the knitting | organization organization chart which shows typically a part of 1st precursor knitted fabric 20E which is 4th Embodiment of this invention.

It is a side view which shows the knitting part of the back jacquard raschel knitting machine 60C for knitting the 1st precursor knitted fabric 20C, 20D of 3rd and 4th embodiment. It is a knitting | organization organization chart which shows typically a part of 1st precursor knitted fabric 20F which is 5th Embodiment of this invention. It is a side view which shows the knitting part of the back jacquard raschel knitting machine 60F for knitting the 1st precursor knitted fabric 20F of 5th Embodiment.

Explanation of symbols

20 First precursor knitted fabric 21 Chain knitting yarn 22 Insertion yarn 23 Thermal bonding yarn 24 First loop portion 25 Second loop portion 26 Chain knitting portion 120 Lace knitted fabric C Course direction W Wale direction

Claims (9)

The chain knitting yarn forms a chain knitting structure in which a plurality of loop-shaped portions are formed, and a knitted fabric having stretchability by knitting a thermal bonding yarn having a melting temperature lower than that of the chain knitting yarn into the chain knitting structure. Knitting fabric knitting process of knitting the ground,
A heating step of heating the knitted fabric containing the thermal bonding yarn to a temperature lower than the melting temperature of the chain knitting yarn and higher than the melting temperature of the thermal bonding yarn;
A knitting lace manufacturing method comprising: a knitting lace containing a thermal bonding yarn, and a breaking step of breaking the thermal bonding yarn after melting by applying tension to the knitted fabric.   The knitting conditions in the knitted fabric knitting step and the heating step so that the elongation limit amount ε1 of the entire knitted fabric excluding the thermal bonding yarn after the heating step is larger than the elongation limit amount ε2 of the thermal bonding yarn after the heating step. 2. The method for manufacturing a knitted lace according to claim 1, wherein heating conditions are set.   The method for manufacturing a knitted lace according to claim 1 or 2, wherein the heating step and the breaking step are performed simultaneously.   The heating condition in the heating step is set to a heating condition that melts the thermal bonding yarn and prevents brittleness of the yarn other than the thermal bonding yarn included in the knitted fabric. The manufacturing method of the knitted lace as described in any one of these.   The method for manufacturing a knitted lace according to any one of claims 1 to 4, wherein the heating condition in the heating step is set to a heating condition in which the thermal bonding yarn is divided by melting.   The knitted fabric knitting step is characterized by using a polyester-based thermoplastic polyurethane elastic yarn of 10 denier or more and 300 denier or less as a thermal bonding yarn and heating at a heating temperature of 170 ° C. or more and 195 ° C. for a time of 30 sec or more and 90 sec or less. The method for manufacturing a knitted lace according to any one of claims 1 to 5. In the knitted fabric knitting process, other insertion yarns are knitted in addition to the thermal bonding yarn,
In the chain knitting portion, the first loop-shaped portion and the second loop-shaped portion are alternately arranged in a plurality of stages in the course direction, and the second loop-shaped portion is a first stage in the course direction of the second loop-shaped portion. The loop-shaped portion is inserted to extend toward the rear stage in the course direction, and the second loop-shaped portion is connected to the first loop-shaped portion at the rear stage in the course direction through the first loop-shaped portion at the same stage in the course direction. Is formed in a chain and extends in the course direction,
In the portion where the thermal bonding yarn and the other insertion yarn are knitted together, the direction of insertion between the first loop-shaped portion and the second loop-shaped portion is different between the thermal bonding yarn and the other insertion yarn. The method for producing a knitted lace according to any one of claims 1 to 6. In the knitted fabric knitting process, in addition to the heat-bonding yarn, stretchable elastic yarn is knitted in an extended state,
In the chain knitting portion, the first loop-shaped portion and the second loop-shaped portion are alternately arranged and arranged in a plurality of stages in the course direction, and the second loop-shaped portion to be noticed is located at the front stage in the course direction of the second loop-shaped portion. The first loop-shaped portion is inserted through the first loop-shaped portion in the course direction and the second loop-shaped portion extends through the first loop-shaped portion in the course direction. By being connected, it is formed in a chain and extends in the course direction,
In the portion where both the thermal bonding yarn and the stretch yarn are knitted, the direction of insertion between the first loop-shaped portion and the second loop-shaped portion is different between the thermal bonding yarn and the stretch yarn. The manufacturing method of the knitted lace as described in any one of Claims 1-7.   A knitted lace manufactured by the method for manufacturing a knitted lace according to any one of claims 1 to 8.

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