HK1064715B - Warp knitted tape for slide fastener - Google Patents

Description

Warp-knitted tape for slide fastener

Technical Field

The present invention relates to a warp knitted tape for a slide fastener, and more particularly, to a warp knitted tape for a slide fastener, which enables easy and accurate sewing of fastener elements onto a fastener tape, and has excellent flexibility and texture.

Background

Recently, zippers are frequently used in various clothes, particularly clothes having excellent flexibility or drapability, or thin clothes. In the field of such clothes, there is a natural need for a zipper having excellent flexibility or drapability, or having a thin structure. However, the slide fastener also needs to have structural stability while satisfying the above requirements. From the viewpoint of its structure and fixing stability, the knitted fabric is particularly suitable for use as a fastener tape having flexibility and drapability or a thin structure, and a warp knitted fabric structure capable of controlling stretchability is most suitable.

Conventionally, a fastener tape having such a warp knitting structure has been known, for example, as disclosed in Japanese Utility model application laid-open No. 51-44405, Japanese Utility model application laid-open No. 54-35769, Japanese patent application laid-open No. 55-37241, and Japanese patent application laid-open No. 5-91908. The warp knitted tapes for slide fasteners disclosed in these publications have accordingly a specific purpose, their warp knitting structure and yarn control being designed in various ways in order to achieve the respective purpose.

For example, according to the disclosure of the aforementioned japanese utility model application laid-open No. 51-44405, since wales formed on the tape have the same hardness in the conventional warp-knitted tape for slide fasteners, the wales restrict or block smooth penetration of sewing needles when the tape is sewn to clothes or the like. To solve this problem, in the wale adjacent to the needle-inserted portion, a plurality of knitting constituent yarns are thinner than those in the other wales, so that the adaptability of the wale adjacent to the needle-inserted portion to the needle insertion is improved. According to the disclosure of japanese utility model application laid-open No. 54-35769, wales adjacent to the side edge portion wale of the fastener tape are bulkier than wales in the side edge portion, and wale grooves on both sides of this bulky wale are wider than wales in other knitting portions. At the same time, the structure of the other knitted sections has a uniform warp knit structure, the bulky wales engaging with grooves formed in the legs of the fastener elements, thereby preventing deflection of the fastener elements therefrom. According to the disclosure of Japanese patent application laid-open No. 55-37241, wales are formed from one non-textured yarn with a knitting structure including a pillar and a repeat, and two types of textured yarns having different shrinkage are knitted in as weft in-laid yarns, thereby obtaining a warp knitted tape having excellent texture without much stretching.

According to the disclosure of japanese patent application laid-open No. 5-91908, in the fastener element coupling portion, a non-textured yarn is used for all knitting yarns, a non-textured yarn is used for the zipper knitting yarn, and a textured yarn is used for the tricot knitting yarn and the weft in-laid yarn in the fastener tape main body portion, so that different tape thicknesses are obtained in the fastener element coupling portion and the fastener tape main body portion. Meanwhile, two wales located at the boundary are formed in the same size, and between the wales, one wale groove is formed by mixing the textured yarn and the non-textured yarn. Thus, it is intended to obtain a warp knitted fabric tape which can be accurately bent at a specific position when a hidden type slide fastener is completed, and which can make it easy to recognize a sewing position when sewing to clothes.

With a conventional slide fastener having a warp knitting structure, generally, a plurality of fastener tapes connected to each other with connecting yarns are simultaneously knitted with a large-sized knitting machine, and after completion of the knitting, the connecting yarns are cut. The fastener elements are attached by sewing along the side edges of the individual fastener tapes produced in the above manner. However, in recent years, in order to accommodate a variety of fastener tapes produced in small quantities, only a single fastener tape or a pair of right and left fastener tapes can be knitted with a small knitting machine at most, and there is no other way.

However, problems arise with the manufacture of fastener tapes with a small knitting machine. The warp knit structure of the fastener tape, which is usually knitted in this manner, includes various knit structures, such as pillar knitting, flat knitting, satin knitting, weft insertion knitting, and the like. If a fastener tape is knitted to form an integral body with such a knitting structure, both side edges (ear portions) of the fastener tape are strongly pressed by weft knitting yarns, so that grooves between wales and wales in fastener coupling portions on the side edges can be discriminated. Even if the fastener element is to be attached to the fastener tape, since the wale groove forming the sewing line is not conspicuous, the sewing position is deviated, and sufficient fastener element attachment strength cannot be obtained.

In order to improve productivity, the knitted fastener tape needs to be heat-set on a sewing machine. This heat setting is performed under tension, which loses its soft texture due to shrinkage and heat setting, and the finished product becomes hard. Therefore, such a fastener tape is not suitable for a soft fabric for women's or children's clothing, etc., and in addition, such a fastener tape, when sewn to a fabric, is bent or extended, which should be solved. Therefore, the sliding resistance of the slider to the fastener element increases after the product is completed, and particularly, there is a large difference in the sliding resistance when opening and closing the fastener, so that the smoothness in the slider opening/closing operation is lost.

Accordingly, an object of the present invention is to provide a warp knitted tape for a slide fastener which is manufactured by a single apparatus, and more particularly, to a warp knitted tape for a slide fastener which has excellent followability to a garment when it is sewn to the garment, which can achieve accurate sewing of fastener elements, which has flexibility in spite of heat setting, and which has excellent drapability, and which can achieve smooth opening/closing of a slider after the fastener elements have been attached to the garment.

Description of the invention

The above object can be achieved by a warp knitted tape for a slide fastener having a narrow width and having a plurality of wales extending in parallel in a longitudinal direction, characterized in that, among knitting yarns forming a structure of a fastener element attaching portion constituted by one plurality of wales, a dry heat shrinkage rate of a knitting yarn provided across at least one wale in a course direction so as to be entangled with another knitting yarn on the wale of the fastener element attaching portion is set to be lower than a dry heat shrinkage rate of a knitting yarn constituting the warp knitted tape.

The warp knitted tape for a slide fastener has a fastener element attaching portion on a side edge in the width direction of the fastener tape, and the other portion serves as a fastener tape main body, as in the fastener tape of the usual woven manner. However, as described above, the knitting structures of the fastener element coupling portions and the fastener tape main body are the same unless there is a special reason for the difference. Typically, wales are formed using either pillar stitches or warp flat knit yarns, or both, and the corresponding wales are connected by weft inserted yarns. Instead of these knitting yarns, in some cases, a heavy warp knitting yarn or a satin knitting yarn is used to connect wales while they are formed.

According to the present invention, the dry heat shrinkage rate of the warp plain knitting yarn and the warp satin knitting yarn forming each wale weave and extending obliquely across one course along the weft direction and the other knitting yarns serving as weft in-laid knitting yarns belonging to the knitting yarns constituting each wale arranged in the connecting portion of the fastener element is smaller than the dry heat shrinkage rate of the other knitting yarns constituting the warp knit tape, and the weft in-laid yarn extends back and forth between a plurality of wales in a zigzag manner between the respective courses.

Due to this structure, when the knitted tape is dry-heat-set, the fastener tape main body is greatly contracted in the width direction so that the interval between the wales becomes narrow. However, in the fastener element coupling portion, the space between the wales is hardly compressed by the knitting yarn because the dry heat shrinkage rate of the knitting yarn entangled with the wale weave while extending in the weft direction is low. As a result, the spacing between the wales does not become much narrower. Therefore, when the fastener element is attached to the fastener element attaching portion on the manufactured warp-knitted tape for the slide fastener by sewing, the sewing yarn is easily and accurately sewn at the sewing position of the fastener element. Thus, after the slide fastener is completed, the fastener elements in the left and right longitudinal strips are firmly coupled to each other, thereby ensuring the bonding strength thereof. Further, since the right and left element rows form an accurate straight line, the sliding resistance of the slider is small, thereby achieving smooth opening/closing operation.

Further, it is preferable that the knitting yarn arranged across one or more adjacent wales so as to be entangled with the wales in the connecting portion of the fastener element has a dry heat shrinkage rate of 4% to 10%, and the other knitting yarn constituting the warp knitted tape weave has a dry heat shrinkage rate of 10% to 20%. Here, the knitting yarn dry heat shrinkage of 10% to 20% represents the shrinkage of a generally used knitting yarn, and it is easily understood that the knitting yarn provided across one or more adjacent wales and entangled with the wale in the connecting portion of the fastener element has a dry heat shrinkage of 4% to 10% or less. If the dry heat shrinkage ratio is less than 4%, the shrinkage of the weft in-laid yarns and the satin knitting yarns in the connecting portions of the fastener elements is very small, so that the width of the groove between the wales may become large. As a result, a sewing position of the sewing yarn when sewing the fastener elements to the fastener tape may be shifted, and the fastener elements may move on the fastener tape after the product is completed, so that leakage of the fastener elements may occur. If the dry heat shrinkage rate exceeds 10%, the shrinkage is so large that the width of the groove between the wales becomes small, and thus, the sewing needle cannot be accurately inserted into the groove.

Preferably, the width of the groove between the row of the fastener tape body adjacent to the coupling portion of the fastener element and the row of the fastener tape body adjacent to the above-mentioned row is 0.8 to 1.5mm, although it may vary depending on the size of the sewing needle. With this structure, the sewing position of the sewing yarn becomes constant. In particular, when the fastener tape is used as a concealed type slide fastener, wales in the body of the fastener tape adjacent to coupling portions of fastener elements become difficult to move even if a large force is applied in a direction of separating the coupled fastener elements, so that contact between the wales is maintained. In addition, if the width of the groove formed between the plurality of wales in the fastener element coupling portion is 0.8 to 1.5mm, the sewing of the fastener element can be accurately and firmly performed, and therefore, the movement of the fastener element within the loop of the sewing yarn is eliminated.

In order to control this groove width, it is effective to control the dry heat shrinkage of a knitting yarn extending across between the wales, such as a weft in-laid yarn or a satin knitting yarn in the connecting portion of the fastener element. However, the groove width between wales between the fastener element connecting portions may be controlled independently of the heat shrinkage rate, for example, by selecting the fineness of the pillar or warp flat knitting yarn constituting the fastener element connecting portions, or may be controlled by increasing the cross-sectional area of the wales by adding warp inlay yarns extending in zigzag in the same wale.

According to the present invention, it is preferable that the knitting yarn constituting the wales in the fastener element attaching part is formed of a multifilament yarn composed of a plurality of filaments having a single fineness of 0.5 to 1.5 dtex, in addition to the knitting yarn arranged to cross one or more adjacent wales and to be entangled with the wales in the fastener element attaching part. Further, the knitting yarn arranged across the adjacent wales and entangled with the wales in the connecting portion of the fastener elements is preferably formed of a multifilament yarn composed of a plurality of filaments having a single fiber fineness of 1.5 to 4.0 dtex.

For example, in such a warp knitted fabric tape, a multifilament yarn composed of a plurality of filaments is used in some cases, the fineness of the multifilament yarn is generally 110 dtex, which is composed of 24 filaments, or the fineness of the multifilament yarn is 330 dtex, which is composed of 36 filaments. The fineness of each filament is large, i.e., 4 to 9 dtex.

In contrast, it is understood that a multifilament yarn composed of a plurality of filaments finer than conventional filaments is used as all the knitting yarns forming the fastener tape of the present invention. In addition, the single fiber fineness of each filament constituting all knitting yarns is set to be as small as 0.5 to 1.5 dtex, except that weft in-laid yarns and warp in-laid yarns which are arranged across one or more adjacent wales and intertwined with wales in the fastener tape are arranged. The single fiber fineness of each constituent filament of the weft in-laid yarn and the warp in-laid yarn composed of a plurality of filaments is set to 1.5 to 4.0 dtex, which is larger than the fineness of the constituent filament of the aforementioned knitting yarn.

Therefore, according to the present invention, filaments having smaller fineness than conventional filaments are employed, and in particular, constituent filaments of knitting yarns mainly constituting the wales of the fastener tape are smaller in fineness than constituent filaments of other weft in-laid yarns and warp inlay yarns. If a multifilament yarn composed of a plurality of filaments having a smaller fineness than conventional filaments is used, the flexibility of the single filament itself is increased. Furthermore, since the respective filaments may be separated after the multifilament yarn is formed, the flexibility of the entire yarn depends on the flexibility of the constituent filaments, so that the flexibility of the knitted yarn is greatly improved. As a result, the flexibility of the fastener tape, particularly the flexibility of the fastener tape in the longitudinal direction, is improved, and structural stability in the width direction can also be obtained. Further, the draping property of the entire fastener tape can be increased. After the zipper using the warp knitted tape of the present invention is sewn to a soft fabric, the obtained product is beautiful without any warping or stretching at the sewing portion.

In addition to the excellent flexibility of the fastener tape in the longitudinal direction, the dimensional stability in the width direction of the fastener tape can be obtained while the flexibility of the entire fastener is ensured and the drapability thereof is excellent, and the fastener element is accurately and firmly fixed at a predetermined position of the warp knitted tape. Moreover, when the warp knitted fabric tape of the present invention is sewn to a soft fabric, it can not only be adapted to the softness of the fabric but also obtain an aesthetic sewing, and can realize smooth opening and closing of the slider.

Further, according to the present invention, it is preferable that all the knitting yarns forming the fastener tape main body are constituted by bulky yarns. If such bulked yarns are used in the main body of the fastener tape, the stiffness of the entire fastener is eliminated, and the resulting fastener becomes extremely soft. The use of the bulky yarn is not limited to the fastener tape main body, but may be used in the fastener element attaching portion as needed.

Description of the drawings

FIG. 1 is a schematic view showing a knitting structure of an entire warp knit tape for a concealed type slide fastener according to a first embodiment of the present invention;

FIG. 2 is a schematic representation of the knit structure of each of the constituent yarns of the warp knit tape described above;

FIG. 3 shows a state of sewing the fastener elements to the warp knitted fabric tape;

FIG. 4 is a front view schematically showing the structure of a concealed type slide fastener using a warp knitted tape;

FIG. 5 is a schematic view of a fully knitted structure of a warp knit tape for a general slide fastener according to a second embodiment of the present invention;

FIG. 6 is a schematic representation of the knit structure of each of the component yarns of the same warp knit tape;

FIG. 7 is an explanatory diagram showing a first sewing state of the fastener elements to the warp knitted tape;

fig. 8 is an explanatory diagram showing a second sewing state of the fastener element to the warp knitted tape.

Detailed Description

Hereinafter, a warp knit tape for a slide fastener according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 to 4 show a warp knitted tape for a concealed type slide fastener according to a first embodiment of the present invention, fig. 2 shows a warp knitted structure of each constituent yarn, fig. 3 is a schematic view of fastener elements attached to the warp knitted tape of this embodiment, and fig. 4 shows a front view schematically illustrating a concealed type slide fastener formed with such a warp knitted tape.

For the warp knit webbing 10 for a concealed type slide fastener of this embodiment, a pair of left and right warp knit webbings are simultaneously knit on a single knitting machine. The entire width of each warp knitted tape 10 is defined by 13 wales W₁To W₁₃And (4) forming. Two wales W on opposite side edge portions₁，W₂Serving as the fastener element attaching portion 11. The remaining wales W located on the inner side of the fastener element coupling portion 11₃To W₁₃The fastener body 12 is formed. This warp knitted tape 10 comprises the following yarns: pillar stitches C1 to C13 knitted at 1-0/0-1 in each wale W1 to W13; warp flat knit yarns T1 to T12 knitted with 1-2/1-0, which yarns connect adjacent two wales with sinker loops and form needle loops on adjacent two wales; weft inserted knit yarns L1 to L10 knit at 0-0/4-4, which isThe yarns extend in a zigzag pattern across four wales.

The left and right pairs of warp knitted tapes 10, 10 are joined by connecting yarns CY knitted at 0-0/2-2 connecting the first wales W1 and W1 of the two opposing fastener element attaching portions 11 in a zigzag pattern. Although not shown in fig. 1 for the sake of easy understanding, the warp inlay yarns WL1, WL2 having the knitting structures 0 to 0/1-1 are also knitted in the first and second wales W1, W2 forming the coupling portion of the fastener element together with the chaining yarns C1, C2, the warp flat knitting yarns T1, T2, and the weft inlay knitting yarns L1, L2, with the warp inlay yarns WL1, WL2 extending in zigzag along the respective wales W1, W2.

The most important feature of the present embodiment is that the physical properties and structure of a part of the knitting yarn for the fastener element coupling portion 11 and the fastener tape main body portion 12 are changed. Yarns having a dry heat shrinkage ratio of 4 to 10% are used as warp plain knitting yarns T1 to T3 and weft insertion knitting yarns L1 to L3, which are entangled with three wales W1 to W3 forming the fastener element coupling portion 11 and the fastener tape main body portion 12 adjacent to the coupling portion 11. Yarns having higher dry heat shrinkage of 10% to 20% are used as all of the chaining yarns C1 to C13, the warp inlay yarns WL1, WL2 in wale W1, W2 of the fastener element coupling portion 11, the warp plain knitting yarns T4 to T12 in the remaining wales W4 to W13 in the fastener tape main body portion 12, and the weft inlay yarns L4 to L10.

Yarns having a low dry heat shrinkage ratio are used as the warp flat knitting yarns T1 to T3 and the weft insertion knitting yarns L1 to L3 having a knitting structure of 0-0/4-4, and the warp flat knitting yarns T1 to T3 are entangled and returned in a zigzag manner with two wales W1, W2 located in the fastener element coupling portion 11 and a wale W3 adjacent to the wales W1, W2. A yarn having a high dry heat shrinkage rate is used as a knitting yarn of all wales constituting the fastener tape main body portion 12 except for the wale W3 adjacent to the fastener element coupling portion 11. Therefore, after heat-setting, the shrinkage of the weft inserted knitting yarns L1 to L3 located at and near the fastener element coupling portion 11 is small, and the width variation in the fastener tape width direction of the four wales W3 to W6 and the two wales W1, W2 located in the fastener element coupling portion 11 is small compared with the width variation of the other wales W7 to W13 in the fastener main body portion 12. In contrast, the fastener main body portion 12 is greatly contracted in the fastener tape width direction, so that the interval between the wales is narrowed. As a result, when the fastener element is attached to the fastener element attaching portion 11 of the manufactured warp knitted webbing 10 by sewing, the sewing thread becomes easy to be accurately sewn at the sewing position of the fastener element. Therefore, after the slide fastener is formed, the fastener elements E positioned in the left and right longitudinal strips (stringers) are firmly coupled to each other, thereby obtaining a sufficient coupling strength, and in addition, the left and right element rows ER are highly regularly arranged. Therefore, the sliding resistance of the slider is small, thereby achieving smooth opening/closing operation.

According to the invention, it is also characteristic that all the knitting yarns constituting the warp knitted fabric tape 10 use multifilament yarns consisting of a plurality of filament fibers, which have a very small fineness. Since the multifilament yarn composed of filament fibers having a small fineness is composed of fine and flexible filament fibers each of which can move freely to some extent, the multifilament yarn itself has excellent flexibility, so that the obtained warp knitted fabric tape is very soft and has excellent drape performance.

The fineness of each filament fiber constituting the multifilament yarn used in the present invention is very small, 0.5 to 4.0 dTex (dTex) — to what extent this value is small can be understood from the fact that the fineness of each filament fiber in the multifilament yarn used in the conventional warp-knitted webbing is 4 to 9 dTex. According to this embodiment, in the above-described fineness range, the filament fibers having a single fiber fineness of 0.5 to 1.5 dtex are used as all the chaining yarns C1 to C13 and the tricot knitting yarns T1 to T12, and the filament fibers having a relatively large single fiber fineness of 1.5 to 4 dtex are used as the weft in yarns L1 to L10 and the warp inlay yarns WL1, wl2 although according to this embodiment, the filament fibers having a single fiber fineness of 0.5 to 1.5 dtex are used for all the chaining yarns C1 to C13 and the tricot knitting yarns T1 to T12 of the warp-knitted webbing 10, and the fineness of the filament fibers in the multifilament yarn forming the wale in the fastener tape main body portion 12 is not limited by the above-described fineness, however, if a certain degree of rigidity of the warp-knitted webbing can be accepted, the filament fibers having a large fineness can be used.

As described above, very thin filament fibers are used for the chaining yarns C1 to C13 and the warp plain knitting yarns T1 to T12, which are main knitting yarns forming the wales in the warp knitted webbing, while filament fibers having a relatively large single fiber fineness are used for the weft insertion knitting yarns L1 to L10, the fastener tape is structurally stabilized in the width direction while ensuring sufficient flexibility of the fastener element attaching portion 11. Meanwhile, the reason why the filament fiber having a relatively large single fiber fineness is also used for the warp inlay yarns WL1, WL2, which are entangled along the wales W1, W2 in the fastener element coupling portion 11, is to stabilize the structure of the fastener element coupling portion 11. The reason why the filament fiber having a large single fiber fineness is used for the warp inlay yarns WL1, WL2 is to secure a certain degree of rigidity of the fastener element coupling portion 11 in the longitudinal direction of the slide fastener, which warp inlay yarns WL1, WL2 are located in the wales W1, W2 of the slide fastener body portion 12.

According to this embodiment, the bulky yarn is used for all knitting yarns constituting at least the fastener tape main body 12. If the bulky yarn is used for all the knitting yarns in the fastener tape main body 12, the soft feeling of the fastener tape main body 12 can be improved, for example, without uncomfortable feeling even when the fastener tape is used in a portion requiring soft texture such as underwear. Meanwhile, a bulky yarn may be used for the constituent yarn in the fastener element connecting portion 11. If the bulky yarn is in the fastener element connecting portion 11, the slide fastener CF has not only a soft feeling but also a drape property after completion for the entire concealed type.

According to this example, a multifilament yarn composed of 72 filament fibers having a single fiber fineness of 1.08 dtex and having an overall fineness of 78 dtex was used for the chaining yarns C1 to C13. a multifilament yarn composed of 96 filament fibers having a single fiber fineness of 1.14 dtex and having an overall fineness of 110 dtex was used for the tricot knitting yarns T1 to T12, a multifilament yarn composed of 48 filament fibers having a single fiber fineness of 2.29 dtex and having an overall fineness of 110 dtex was used for the weft insertion knitting yarns L1 to L10. further, a multifilament yarn composed of 60 filament fibers having a single fiber fineness of 2.78 dtex and having an overall fineness of 167 dtex was used for the warp insert yarns WL1, WL2.

Since this embodiment relates to a warp knitted tape for a concealed type slide fastener, the overall fineness of the multifilament fiber used as the knitting chain yarn C3 in the wale W3 adjacent to the fastener element attaching portion 11 in the fastener tape main body 12 can be further increased. In this case, when the warp knitted tape 10 provided with the fastener element E is folded back by the inverted portion where one fastener element attaching portion 11 is adjoined, the wale W3 is expanded. As a result, when the fastener element is attached, it is brought into firm contact with the coupling wale W3. Therefore, even if a large side pulling force is applied to the slide fastener in the width direction of the fastener tape, the wale W3 cannot be separated, so that the element row ER located inside is not seen from the outside (fig. 4).

In the warp-knitted tape for the concealed type slide fastener according to this embodiment manufactured in the above-described manner, the width of the groove is surely obtained between the two wales W1, W2 in the fastener element attaching portion 11 and the wale W3 adjoining the fastener element attaching portion 11, so that the sewing yarn SY can be sewn at a predetermined position of the element E when the fastener element E is attached to the warp-knitted tape 10 by sewing as shown in fig. 3. At the completion of the product, the fastener elements do not move on the fastener tape, and there is no possibility of losing the fastener elements E or detaching the coupling. The resulting warp knit tape 10 is highly flexible, highly drapeable, and very soft, and can be neatly stitched to a flexible fabric with excellent follow-up properties.

When the concealed type slide fastener CF as shown in fig. 4 is manufactured with the warp knitted webbing 10, a continuous fastener element row ER formed by forming a coil from a thick synthetic resin monofilament is disposed on one wale surface formed on the fastener element attaching portion 11 of the warp knitted webbing 10 such that the coupling head portion Eh of each fastener element E faces the fastener tape main body 12 and the attaching portion Ec thereof is disposed on the side of the fastener tape. The sewing needle N pierces two grooves located between the respective wales, i.e., one located between wales W1 and W2 in the fastener element coupling portion 11 and the other located between the wale W2 and a wale W3 in the fastener tape body 12 adjacent to the wale W2, thereby sewing the fastener tape. At this time, if the groove width between the respective wales exceeds the range of 0.8 to 1.5mm, the sewing needle N cannot perform accurate needling because the groove is too narrow, or even if needling can be performed, the element E cannot be fixed at a predetermined position because the groove is too wide, so that the sewing yarn may be loosened after sewing. Therefore, the element E may move in the width direction of the fastener tape, and sometimes it may slip out. In addition, the respective elements E may be misaligned, so that the opening/closing operation of the slider (not shown) on the slide fastener is difficult to be smoothly performed.

As described above, if the fastener element row ER is connected to the warp knitted tape 10 with the sewing yarn SY, the inverted portion between the fastener element connecting portion 11 and the fastener tape main body 12 is folded so that the fastener element row ER is on the outside. This bending takes, as a bending point, a wale W3 in the fastener tape main body 12 adjacent to the inner wale W2 of the fastener element coupling portion 11, as shown in fig. 4. After the bending is completed, the warp knitted webbing is sewn to a sewing portion of a target fabric. And the sewn portion at this time is a wale groove formed between a wale W3 in the fastener tape main body 12 adjacent to the inner wale W2 of the fastener element coupling portion 11 and a wale W4 adjacent to the wale W3, as shown in fig. 3.

The groove width formed between the wales W3 and W4 is preferably in the range of 0.8 to 1.5mm as the fastener element coupling portion 11. With such a slot width, sewing can be performed accurately and firmly, and in addition, the slot does not move between the stitches of the sewing yarn. Even when a side pulling force in the fastener tape width direction is exerted on the fastener elements of the concealed type slide fastener CF in the coupled state to release the coupling of the fastener elements, the wale W3 located adjacent to the inner wale W2 of the left and right fastener element coupling portions 11 in the fastener tape main body 12 can maintain their mated state, thereby maintaining the function of the concealed type slide fastener CF.

If in the concealed type slide fastener CF manufactured in this way, the opposing element rows ER of the right and left longitudinal tapes (stringers) are coupled to each other, the longitudinal rows W3 at the bending points of the bending portions are in a state of being firmly contacted with each other as shown in fig. 4, so that the fastener element rows ER become invisible from the outside. Now, if an external force is applied to the article to which this concealed type slide fastener CF is attached, a strong side pulling force is applied in a direction separating the left and right longitudinal strips S, and the fastener element row ER can be seen. This is a fatal problem for the concealed type slide fastener CF. Therefore, in this embodiment, the wale W3 can be formed larger by using a yarn of larger fineness than the other knitting yarns, which are the pillar knitting yarns C3 in the wale W3 as described above.

Fig. 5 to 8 show a second embodiment of the present invention. Fig. 5 shows the knitting structure of the entire warp knit tape for the slide fastener according to this embodiment, and fig. 6 shows the knitting structure of each knitting yarn in the same structure. Fig. 7 shows a first sewing state in which the fastener elements are sewn to the warp knitted fabric tape, and fig. 8 shows a second sewing state in which the fastener elements are sewn to the warp knitted fabric tape. The warp knit tape 10 of this embodiment is a warp knit tape for a conventional zipper formed by knitting with a single warp knitting machine.

In this embodiment, since the structure of the knitting yarn (multifilament yarn), the dry heat shrinkage rate of the knitting yarn, the fineness of the knitting yarn, and the fineness of the single fiber of the filament fiber constituting each knitting yarn are the same as those in the first embodiment, a detailed description thereof is omitted here, and the structure different from that in the first embodiment is mainly described hereinafter.

In this embodiment, the basic knitting structure forming the respective wales W1 to W13 in the warp knitted webbing 10 is constituted by pillar knitting and warp flat knitting, similarly to the first embodiment. Warp inlay yarns WL1, WL2 of knit construction 0-0/1-1 are knitted into the two wales W1, W2 in the fastener element coupling portion 11. The structure differs from that of the first embodiment in that some of the knitting yarns extend across one or more wales of the knitting structure. According to this embodiment, satin knitting yarns ST1 to ST10 having a knitting structure of 0 to 1/4-3 are employed in place of the weft in-laid yarns L1 to L10 in the first embodiment. By adopting such a structure, in addition to obtaining the effects of the first embodiment, in all wales W1 to W13 forming the warp knitted webbing 10, needle loops are formed by all knitting yarns except for the warp inlay yarns WL1, WL2. Thus, the entire structure of the warp knitted webbing is more stable.

As shown in fig. 7, according to a first sewing state in which the fastener elements E are attached to the warp knitted tape 10 by sewing, a continuous fastener element row ER made of synthetic resin thick monofilaments in a coil-like shape is sewn to the surface of a wale formed in the fastener element attaching portion 11 of the warp knitted fastener tape 10 by inserting a sewing needle N into a groove formed between two wales W1, W2 of the fastener element attaching portion 11 and a groove between the wale W2 and a wale W3 adjacent to the wale W2 in the fastener tape body 12 according to a so-called two-needle one-looper method (2-needle 1-looper method).

As shown in fig. 8, according to a second sewing state in which the fastener elements E are attached to the warp knitted tape by sewing, a continuous fastener element row ER made of synthetic resin thick monofilament is sewn to the wale surface formed in the fastener element attaching portion 11 of the warp knitted fastener tape 10 according to a so-called needle-and-looper method by inserting a sewing needle N into a single groove formed between two wales W1, W2 of the fastener element attaching portion 11.

Since the warp knitted tape 10 of the second embodiment is used for a conventional slide fastener, after the fastener element rows ER are sewn as described above, the warp knitted tape 10 is not folded as in the first embodiment, but the conventional slide fastener SF is completed through a slider mounting step, an upper/lower stopper means connecting step, and other various processing steps (not shown).

The various embodiments described above show typical examples of the present invention, and the present invention is not limited to these embodiments, for example, the warp knitting structure described in the present invention is not limited to the combination of pillar knitting, warp flat knitting, warp cushion knitting, weft insertion knitting, and satin knitting, but various other knitting structures may be combined. In addition, although a multifilament yarn having substantially no twist is used for all the knitting yarns in the above embodiments as the yarn structure of the knitting yarn, a twisted yarn may be used for a partial knitting yarn such as a zipper yarn in a connecting portion of a fastener element. Further, the total fineness of each knitting yarn is not limited to the above-described embodiment, but may be variously changed as needed.

Claims (6)

1. A warp knitted tape for a slide fastener having a plurality of wales (W1 to W13) extending in parallel in a lengthwise direction, the warp knitted tape comprising a fastener element connecting portion (11) and a fastener tape body (12), wherein the fastener element connecting portion (11) is constituted by a plurality of wales (W1, W2), the fastener tape body (12) is also constituted by a plurality of wales (W3-W13), characterized in that, in each knitting yarn (C1, C2, T1, T2, L1, L2, WL1, WL2, ST1, ST2) of the plurality of wales (W1, W59 2 4) forming the fastener element connecting portion (11), a yarn (W2, W2) crossing an adjacent wale (W2 to W2) on a side of the fastener tape body (12) is arranged so as to be entangled with one knitting yarn (W2, W2) of the wale (W2, W2) of the fastener element connecting portion (11) or a plurality of the knitting yarns (T2, T2, ST2, ST2) is set to be lower than those of the other knitting yarns (C1 to C13, T3 to T12, L3 to L10, ST3 to ST10) constituting the warp knit tape.

2. The warp-knitted tape for a slide fastener according to claim 1, wherein the knitting yarn (T1, T2, L1, L2, ST1, ST2) arranged across one or more adjacent wales on said side of the fastener tape body (12) so as to be entangled with wales (W1, W2) of said fastener element attaching portion (11) has a dry heat shrinkage ratio of 4% to 10%, and the other knitting yarns (C1 to C13, T3 to T12, L3 to L10, ST3 to ST10) constituting said warp-knitted tape have a dry heat shrinkage ratio of 10% to 20%.

3. The warp-knitted tape for a slide fastener according to claim 1, wherein the dry heat shrinkage rate of the knitting yarn (T3, L3, ST3) arranged across one or more wales so as to be entangled with a wale (W3) located in the side of the fastener tape body (12) immediately adjacent to the fastener element attaching portion (11) is 4% to 10%.

4. The warp knitted tape for a slide fastener according to claim 1 or 2, wherein a width of a groove between a wale (W3) of said fastener tape body (12) adjacent to said coupling portion (11) of the fastener element and another wale (W4) of said fastener tape body (12) adjacent to the wale (W3) adjacent to said coupling portion (11) of the fastener element is 0.8 to 1.5 mm.

5. The warp-knitted tape for slide fasteners according to claim 1 or 3, wherein knitting yarns (L1 to L10, ST1 to ST10) arranged across two or more adjacent wales on said side of the fastener tape (12) so as to be entangled with said fastener element attaching portion (11) and corresponding wales (W1 to W13) in the fastener tape main body (12) and a knitting yarn (WL) arranged in a zigzag structure along corresponding wales (W1, W2) in said fastener element attaching portion (11) are constituted of a plurality of filament finenesses of 1.5 to 4.0 dtex for a single fiber, and all other knitting yarns (C1 to C13, T1 to T12) except said entangled knitting yarns (L1 to L10, ST1 to ST10) and knitting yarns (WL) of said zigzag structure are constituted of a plurality of filament finenesses of 0.5 to 1.5 dtex for a single fiber.

6. The warp-knitted tape for a slide fastener according to claim 1, wherein at least all knitting yarns constituting said fastener tape body (12) are bulky yarns.