JP2018012899A - Fabric manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a light fabric preferable for a side cloth of a down wear, a down jacket, a sleeping bag, a futon, and the like, having soft touch, and no skitteriness while keeping low permeability even after repeated wear, and laundry.SOLUTION: A method of manufacturing a fabric includes: weaving a fabric using a synthetic multifilament satisfying conditions (i)-(iii); thereafter dying, or printing; successively repellently finishing; and thereafter calendering to make a convexity of a multifoliate shape of a sectional plane of a single yarn of the synthetic multifilament contact a concavity a multifoliate shape of a sectional plane of a neighboring single yarn so as to bite each other, the conditions (i)-(iii) including: that (i) the single fiber fineness is 0.5-2.0 dtex, and the total fineness is 6-67 dtex; that (ii) the single yarn has a multifoliate shaped sectional plane formed by alternately continuing approximately same shaped round convexities and approximately same shaped round concavities, and the number of the convexities in the multifoliate shape is 5-10; and that (iii) the irregular shape degree of the multifoliate shape of the sectional plane of the single yarn is not less than 1.3 and not greater than 2.0.SELECTED DRAWING: Figure 1

Description

  The present invention is a fabric that is soft and free of irritation (glossy spots) and that can maintain a low air permeability even after washing. The present invention relates to a method for producing a woven fabric suitable for a jacket, a sleeping bag, and a futon side.

In addition to being lightweight, downwear, sleeping bags, and futon sides to obtain heat insulation are required to be free of down and medium cotton popping out when worn or washed. The evaluation method of this characteristic has air permeability, and the side fabric for such use needs to have an air permeability of 1.5 cm ³ / cm ² · s or less. In addition, this air permeability value lacks practicality unless it is maintained even after repeated wearing and washing. In order to satisfy these requirements, the fabric is generally densified, but as a result, the fabric weight increases, it becomes hard, and it is difficult to obtain light weight. Inconvenience that it becomes difficult to obtain.

  In order to maintain a low air permeability without using such a densified woven fabric, the present inventors used a Y-shaped cross section or a cross as a single yarn used in the woven fabric with a deformity of 2.0 to 6.0. It has been proposed to use a modified cross-section yarn having a mold section (see Patent Document 1). However, the woven fabric of Patent Document 1 has the roughness due to the reflection of the cross-sectional shape and the hardness of the texture due to the hardness of the bending rigidity from the high degree of irregularity, and it is necessary to solve these problems There was sex.

JP 2010-196213 A

  The present invention was devised in order to solve the problems of the prior art, and the object thereof is a method for producing a woven fabric suitable for a side fabric such as a downwear, a down jacket, a sleeping bag, a futon, and the like. An object of the present invention is to provide a woven fabric having a soft texture without irritation while maintaining a low air permeability even after being worn or washed.

  In order to achieve the above-mentioned object, the present inventor has intensively studied in order to improve the hardness of irritability and texture without losing the low air permeability retention after washing, which the fabric of Patent Document 1 has. As a result, it has been found that the cause of the occurrence of roughness and texture of the fabric of Patent Document 1 is mainly due to the high degree of irregularity of the single yarn and the small number of convex portions having a cross-sectional shape.

  In other words, as for the unevenness, in Patent Document 1, the single yarn on the surface of the woven fabric after calendering, for example, in the case of a Y-shaped cross section, two of the three convex portions become almost flat by pressing. The shape is increased in regular reflection (see FIGS. 2 and 3 of Patent Document 1). From this, it is recognized that the flat part has a high degree of irregularity of the single yarn, that is, the distance between the convex part and the concave part is long, and the degree of irregularity increases as it is linear. The arrangement in the length direction of the yarn in the woven fabric is not uniform due to turbulence between single yarns, twisting, bending at the tissue points, and the strength of the yarn binding force between the tissue points, etc. As the number of single yarns increases, the number of regular reflection portions and irregular reflection portions increases, resulting in an irritating quality. As the cross-sectional shape becomes round, such a phenomenon hardly occurs and a good-quality fabric appearance is exhibited.

  Regarding the texture, in Patent Document 1, since the distance between the convex part and the concave part becomes longer as the degree of deformity of the single yarn becomes higher, the meshing structure between the single yarns is deep and the structure is firm (Patent Document 1). FIG. 3). This structure is a major reason for maintaining a low air permeability even after washing, but if the meshing is too firm, it acts as a force against external forces, which is a major factor that makes you feel hardness. When the cross-sectional shape of a single yarn is rounded to make a finely woven fabric, this hardness is eliminated and a soft texture is obtained.

  From the above examination results, the present inventor firstly used a single yarn to be used as a multi-leaf-shaped cross section in which substantially rounded convex portions having substantially the same shape and rounded concave portions having substantially the same shape are alternately and continuously formed. The number of convex portions is increased to a multi-leaf cross section having 5 to 10, preferably 5 to 8, convex portions, so that the single yarns can be easily engaged with each other by the convex portions and the concave portions, and the deformity of the single yarn Is set to a low value of 1.3 or more and less than 2.0, preferably 1.3 or more and 1.9 or less, thereby shortening the length between the convex portions and the concave portions, and if necessary, the multi-leaf of the cross section of the single yarn The linearity of the shape was set to 0 or more and 0.30 or less, and the regular reflection of the light of the single yarn after the calendering process was reduced to eliminate the irritation. Then, the meshing between the single yarns was made shallower and softened by making it easy to move flexibly without losing the meshing structure against the external force, thereby eliminating the hardness of the texture. It came to solve the said subject by setting it as such a textile structure.

This invention is completed based on said knowledge, and has the structure of the following (1)-(6).
(1) After weaving a woven fabric having a cover factor of 1450-2100 using a synthetic multifilament that satisfies the following conditions (i) to (iii), dyeing or printing, and then water-repellent finishing , One or both sides were calendered so that the multi-lobed convex part of the cross section of the synthetic multifilament single yarn was in contact with the multi-lobed concave part of the cross section of the adjacent single yarn A method for producing a woven fabric characterized by the above.
(I) The single yarn fineness is 0.5 to 2.0 dtex, and the total fineness is 6 to 67 dtex;
(Ii) The single yarn has a multi-lobed cross section in which round-shaped convex portions having substantially the same shape and round-shaped concave portions having the same shape are alternately and continuously formed. The number is 5-10;
(Iii) The multi-leaf shape irregularity (radius D of circumscribed circle / radius d of inscribed circle) of the cross section of the single yarn is 1.3 or more and less than 2.0.
(2) The method for producing a woven fabric according to (1), wherein a synthetic multifilament that further satisfies the following condition (iv) is used:
(Iv) The linear rate L / D of the multi-leaf shape of the cross section of the single yarn is 0 or more and 0.30 or less, where the linear rate L / D is the convexity of the multi-leaf shape of the cross-section of the single yarn It refers to the ratio of the length L of the straight line connecting the arc and the arc of the recess to the radius D of the circumscribed circle of the single yarn.
(3) The method for producing a woven fabric according to (1) or (2), wherein the number of convex portions in the multi-leaf shape of the cross section of the single yarn of the synthetic multifilament used is 5 to 8.
(4) The woven fabric according to any one of (1) to (3), wherein the multi-leaf shape irregularity of the cross section of the single yarn of the synthetic multifilament used is 1.3 or more and 1.9 or less Manufacturing method.
(5) The production of the woven fabric according to any one of (2) to (4), wherein the linearity of the multileaf shape of the cross section of the single yarn of the synthetic multifilament used is 0 or more and 0.28 or less. Method.
(6) Any one of (1) to (5), wherein the woven fabric is used for any side selected from the group consisting of downwear, down jackets, sleeping bags, and futons. The manufacturing method of the textile fabric as described in any one of.

  According to the production method of the present invention, it is possible to obtain a durable fabric that is soft and free from irritation, and that does not easily leak down due to repeated wearing or washing without excessive fabric density. This woven fabric can be suitably used for side fabrics such as downwear, down jackets, sleeping bags, and futons.

FIG. 1 is a diagram for explaining the presence / absence of irregularities in the cross section of a single yarn, the degree of irregularity, and the linearity. 2a-2d show examples of the cross-sectional shape of the single yarn of the present invention. 3a to 3e show examples of cross-sectional shapes of single yarns (examples of yarns exhibiting a cross-sectional shape with many planar reflections after calendering) that fall outside the scope of the present invention. 4a-4d show the meshing state of the cross section of some single yarns in the fabric before calendering of the production method of the present invention. FIGS. 5a-5e show the cross-sectional engagement of some single yarns in a fabric before calendering that is outside the scope of the manufacturing method of the present invention. Fig. 6a shows the cross-sectional engagement of some single yarns in the fabric before calendering, and Fig. 6b shows the crossing of some single yarns in the fabric after calendering Fig. 6a. The surface crushing and meshing state are shown, the convex portions of the cross section of the single yarn on the surface of the surface layer and the back layer are crushed, and the single yarn of the inner layer is not crushed. FIG. 7a shows the garment-free quality. FIG. 7b shows the irritated quality of the fabric.

  The method for producing a woven fabric according to the present invention is a method of weaving a woven fabric having a cover factor of 1450 to 2100 using a specific synthetic multifilament, dyeing or printing, then applying a water-repellent finish, and then calendering on one or both sides. Processing is performed, and the multi-lobed convex portion of the cross section of the single yarn is in contact with the multi-lobed concave portion of the cross section of the adjacent single yarn.

In particular, the synthetic multifilament used in the production method of the present invention is characterized by satisfying the following conditions (i) to (iii) and, if desired, (iv).
(I) The single yarn fineness is 0.5 to 2.0 dtex, and the total fineness is 6 to 67 dtex;
(Ii) The single yarn has a multi-lobed cross section in which round-shaped convex portions having substantially the same shape and round-shaped concave portions having the same shape are alternately and continuously formed. The number is 5-10;
(Iii) the multi-leaf shape irregularity (radius D of circumscribed circle / radius d of inscribed circle) of the cross section of the single yarn is 1.3 or more and less than 2.0;
(Iv) The linear rate L / D of the multi-leaf shape of the cross section of the single yarn is 0 or more and 0.30 or less, where the linear rate L / D is the convexity of the multi-leaf shape of the cross-section of the single yarn It refers to the ratio of the length L of the straight line connecting the arc and the arc of the recess to the radius D of the circumscribed circle of the single yarn.

  The multi-leaf shape irregularity of the cross section of the single yarn of the synthetic multifilament used in the present invention is 1.3 or more and less than 2.0 before calendering. The degree of irregularity is represented by the major axis / minor axis (radius D of circumscribed circle / radius d of inscribed circle) of the cross section of the single yarn, and the smaller the value, the shorter the length between the concave and convex portions of the cross section. More preferably, the degree of profile is 1.3 or more and 1.9 or less. If the degree of irregularity is less than the above range, the cross-sectional shape becomes nearly circular, the meshing between adjacent single yarns becomes weak, and the low air permeability retention after washing deteriorates, which is not preferable. When the degree of irregularity exceeds the above range, the line connecting the convex portion and the concave portion in the cross-sectional shape is likely to be linear, and the plane portion that is regularly reflected is increased, so that unevenness (glossy spots) is likely to occur. Moreover, the rigidity with respect to bending becomes strong, and it becomes difficult to obtain softness, which is not preferable. By setting the degree of irregularity in the above range, it is possible to avoid a straight line connecting the convex portion and the concave portion in the cross-sectional shape, and to reduce regular reflection that causes irritations. At the same time, the meshing between the single yarns can be made shallower, and it can be moved flexibly and easily so as not to disengage from the external force.

  The synthetic multifilament single yarn used in the present invention has a multi-leaf-shaped cross section in which substantially convex rounded convex portions and substantially identical rounded concave portions are formed alternately and continuously. The number of convex portions in the leaf shape is 5 to 10. More preferably, the number of convex portions of the multilobal cross-sectional shape is 5-8. The roundness of the concave portion is preferably larger than the roundness of the convex portion. When the number of convex parts is less than the above range, the meshing effect of adjacent single yarns becomes weak, and it is necessary to make it highly irregular when trying to increase the effect, resulting in a linear shape with less roundness, This is not preferable because it causes irritation. When the number of convex portions is larger than the above range, the cross-sectional shape becomes nearly circular, and the meshing effect of the concave portions and convex portions is weakened. If the degree of profile is higher to increase the meshing effect, spinnability becomes difficult, which is not preferable. In the case of a cross-sectional shape like a saddle shape in which two ellipses are joined, if the number of convex parts is small, the effect of engaging the concaves and convexes is weak, and if the rectangular type has convex parts, the irritation can be solved. However, when the flat type has a plurality of convex portions, it becomes a warp-like woven fabric quality and it is difficult to obtain a high-strength yarn, which is not suitable for the present invention. In addition, when the roundness is only on the convex portion and the concave portion is not round and has a linear shape, the line connecting the concave and convex portions becomes linear and planar, and it is difficult to obtain the effect of reducing irritations.

  Like the present invention, by making the cross-sectional shape of a single yarn into a multi-leaf cross-sectional shape consisting of rounded irregularities with a low degree of irregularity and a large number of convex portions, it is possible to increase the number of irregular reflection parts of light, Irritating quality can be eliminated. Furthermore, if the roundness of the concave portion is made larger than the convex portion at the same time, the single yarns can be easily engaged with each other, and the single yarns after calendering are not deeply meshed due to the low profile, so that the meshing structure against external force is not lost. It becomes flexible and easy to move. For this reason, it is easy to maintain a low air permeability even after washing, and a soft texture is easily obtained.

  Here, the phenomenon of irritations is that when a single yarn has a flat portion, the light is regularly reflected, and when the flat portion has the same width, the length of the single yarn is twisted or bent, or the strength of the entanglement is strong, the degree of reflection of light. Changes irregularly, and the glossiness of the entire fabric is not uniform, and it is a phenomenon that looks glossy and irritated. FIG. 7a shows an example of a fabric with good quality without irritation, and FIG. 7b shows an example of a fabric with irritation and poor quality. In both figures, the vertical direction is the warp and the horizontal direction is the weft. In FIG. 7a, it can be read that the warp and weft single yarns are arranged in an orderly manner, but in FIG. 7b, it is difficult to read the warp and single yarns. The fine disturbance of many single yarns found in such warps and wefts is the cause of irritating quality. In the woven fabric of the present invention, the degree of irregular reflection is increased by increasing the degree of irregular reflection by increasing the curved surface portion on the side surface of the single yarn by making the range of the irregularity degree and cross-sectional shape of the single yarn specific. High quality has been achieved.

  In the production method of the present invention, as a result of calendering one or both sides of the woven fabric, the convex portion of the multi-leaf cross-sectional shape of the single yarn of the synthetic multifilament meshes with the concave portion of the multi-leaf cross-sectional shape of the adjacent single yarn. It is characterized by touching. Fabrics such as downwear and down jackets require that the yarns in the fabric do not move easily against stagnation and rubbing during wearing and washing, and are generally easy to sew with low density fabrics using high multifilaments. As a method for preventing this, the cross-sectional shape of the single yarn constituting the synthetic multifilament used in the production method of the present invention is, as described above, round convex portions and concave portions having a higher number of convex portions with a lower degree of irregularity than conventional ones. It is necessary to have a structure in which the convex portion of the single yarn cross-sectional shape meshes with the adjacent concave portion of the cross-sectional shape of the single yarn. However, if an excessive meshing structure is used, a force that resists external force acts strongly and becomes stiff and becomes an obstacle to softening of the texture. In the woven fabric of the present invention, it is preferable to realize a structure that moves flexibly but does not disengage from external forces. Examples of meshing states of cross sections of preferable single yarns of the woven fabric before calendering in the production method of the present invention are shown in FIGS. 4a shows the second embodiment, FIG. 4b shows the fifth embodiment, FIG. 4c shows the eighth embodiment, and FIG. Moreover, the meshing state of the improper single yarns is shown in FIGS. FIGS. 5a to 5c are examples of shapes that have a high degree of profile, a high linearity, an irritating quality, a deep mesh between the single yarns, and a hard texture. 5a shows the meshing state of the single yarns of Comparative Example 1, FIG. 5b shows the Comparative Example 2, and FIG. 5c shows the Comparative Example 3. FIG. 5d shows an example of a shape that has a low degree of profile but has a high linearity, is easily crushed by calendar processing, and easily exhibits an irregular quality (Comparative Example 4). FIG. 5e is a round cross-section, good quality and soft, but is a shape example (Comparative Example 5) in which single yarns are easily separated from each other when the woven fabric is woven, and the low air permeability retention after washing is not good. .

  The single yarn fineness of the synthetic multifilament used in the present invention is 0.5 to 2.0 dtex. More preferably, the single yarn fineness is 0.6 to 1.9 dtex. When the single yarn fineness is less than the above range, even if the degree of profile is low, yarn is broken by spinning, fluff is likely to occur, and yarn production becomes difficult. If it exceeds the above range, the texture becomes hard, which is not preferable. Low air permeability and durability can be obtained by a synergistic effect of single yarn fineness, low profile, and the number of convex portions, and at the same time, elimination of irritation and soft texture can be obtained. In the case where the single yarn has a cross-sectional shape composed of 5 to 6 leaves, a large number of curved surfaces can be provided on the concave portion, the convex portion, and the upper portion of the line connecting the concave portion, so that the degree of irregularity is 1.4 to 2.0 in the above range. , Preferably it can be enlarged as 1.4-1.9. By increasing the degree of irregularity, the curved surface portion is likely to be flat, and in order to suppress the resulting regular reflection, it is preferable to make the single yarn fineness as thin as 0.5 to 1.3 dtex. When the single yarn has a cross-sectional shape composed of 8 to 10 leaves, the curved surface portion becomes larger than the cross-sectional shape composed of 5 to 6 leaves, so that irregular reflection is easily obtained, and the range of the single yarn fineness is 0.5 to 2.0 dtex. Can be spread. In the case of a cross-sectional shape composed of 8 to 10 leaves, irregular reflection can be easily obtained from a cross-sectional shape composed of 6 to 8 leaves, so that the degree of irregularity can be lowered to 1.3 to 1.7. In this case, the single yarn fineness is preferably 0.5 to 2.0 dtex.

  The multi-leaf shape linearity L / D of the cross section of the single yarn of the synthetic multifilament used in the present invention is preferably 0 or more and 0.30 or less. Here, the straight line ratio L / D refers to the ratio of the length L of the straight line connecting the arc of the convex portion and the arc of the concave portion in the multi-leaf shape of the cross section of the single yarn to the radius D of the circumscribed circle of the single yarn (FIG. 1). reference). It is best that the linear rate is zero. That is, it is best that the convex portion and the concave portion of the cross section of the single yarn are connected by a curve, preferably 0.3 or less, more preferably 0.28 or less. When the above range is exceeded, the straight line portion increases, regular reflection increases, and irritation tends to occur. The multi-leaf shape of the cross section of the single yarn after being crushed by calendering is less likely to be linear as the connection between the convex portion and the concave portion is curvilinear, and it is easy to obtain irregular reflection, and to easily eliminate the irritation quality. Although the linearity ratio tends to decrease when the degree of deformity is lowered, there is a shape with a high degree of linearity even with a low degree of irregularity (Comparative Example 4), and it is preferable to have a shape within the scope of the present invention.

  The material of the synthetic multifilament single yarn used in the present invention is not particularly limited, but nylon or polyester is preferably used. The nylon may be 6 nylon, 66 nylon, and the polyester may be a monopolymer or copolymer. Also, chemical recycled yarn or material recycled yarn may be used. The relative viscosity (RV) of nylon is preferably 2.5 to 3.5. More preferably, it is 2.8-3.5, More preferably, it is 3.0-3.5. The relative viscosity (RV) of the polyester is preferably 0.6 to 1.0. More preferably, it is 0.6-0.9. If the relative viscosity is less than the above range, it is difficult to obtain a sharp cross-sectional shape of the yarn, and the strength tends to be weak. Above the above range, spinnability is difficult to obtain. The single yarn of the synthetic multifilament used in the present invention has a low profile, and it is easy to obtain a multi-leaf cross-sectional shape even if it is not the high RV required for high profile, and the deformability and meshing effect in calendering Therefore, it is easy to obtain a low air permeability and its stable durability with a small number of calendars without increasing the temperature and pressure conditions. A weak calender condition can reduce the decrease in tear strength of the fabric, and the tear strength of the fabric can be increased by using a softener in combination with the water repellent.

  The single yarn may contain a bright yarn or a pigment such as titanium oxide, kaolin, or carbon black, if necessary.

  The synthetic multifilament used in the present invention consists of a single yarn having the above-mentioned characteristics. The total fineness of the synthetic multifilament is 6 to 67 dtex. More preferably, it is 8-56 dtex. If the total fineness is less than the above range, spinning becomes difficult, and if it exceeds the above range, the basis weight increases, the lightness is lacking, and it is not suitable for use.

  As characteristics of the synthetic multifilament, it is preferable that the breaking strength is 4.2 to 6.0 cN / dtex and the breaking elongation is 28 to 50% in consideration of weaving property, tear strength of the product, and the like. If the breaking strength exceeds the range, the orientation and crystallization of the yarn proceeds and the texture is hardened, which is not preferable. Below that, it becomes difficult to obtain the tear strength of the fabric, which is not preferable. When the elongation at break exceeds the range, it is easily stretched by the tension during warping and weaving, and the recovery becomes weak, which causes undesirable warp, weft shrinkage and weft unevenness. Below that, warp yarns are not preferred, especially because they cannot absorb the fluctuations in tension during weaving and tend to break. The degree of entanglement is preferably 5 to 30 / m, and more preferably 5 to 20 / m. If the degree of entanglement is too high, entanglement will remain in the fabric, resulting in a difference in light reflection from that where there is no entanglement, which may cause irritation (glossy spots). If it is less than that, it is unfavorable because it is easy to open by handling during aging, easily fluffs, deteriorates the weaving property.

  The woven fabric of the present invention is woven with a synthetic multifilament as described above, and its form is a filament yarn or false twisted yarn. The false twisted yarn can be used in the form of a processed yarn obtained by friction false twisting or pin false twisting of DTY for stretching and false twisting POY and SDY (spin draw yarn). For the purpose of obtaining sharp deformity and cross-sectional shape, use processed yarn (half textured yarn) obtained under false twisting conditions with false twisting temperature 10-20 ° C lower than normal and false twist number reduced 10-30% It is also possible to do. At that time, it is also possible to impart crimpability by making the false twisting speed 10-30% slower than usual. Since false twisted yarn is excellent in crimp retention, nylon is preferably 66 nylon, and polyester is preferably homopolymer polyester.

  The single yarn of the synthetic multifilament used in the present invention is forced to engage with each other by passing through a false twisting process, so that the single yarn having more engagement between the single yarns than before the false twisting. Become a structure. However, the degree thereof is less firm than that of a highly deformed yarn, so that it is easy to obtain crimpability and soft feel, and a preferable structure is obtained. The expansion / contraction restoration rate of the false twisted yarn is preferably 15 to 40%, and more preferably 20 to 35%. If the number of false twists is outside this range, the shape of the cross-section of the multi-leafed leaf will be excessively deformed due to a large number of false twists, and fuzz and yarn breaks will frequently occur in the false twisting process. And can cause a hard texture.

It is preferable that the fabric weight of the fabric of the present invention is 18 to 70 g / m ² . More preferably, it is 20-60 g / m < ² >. When the basis weight is less than the above range, it is necessary to use a yarn having a fine fineness, and it is difficult to obtain a fabric having a practical tear strength. If it exceeds the above range, it is lacking in light weight, and mountain climbing, trekking, etc. are bulky in the backpack packaging, which is not preferable.

  As the texture of the woven fabric of the present invention, a flat texture is preferred from the viewpoint of plainness and light weight, and a ripstop is preferred because it is excellent in handle feeling and tearing strength. Moreover, the cover factor of the heel part (even in the ripstop structure) of the woven fabric machine of the present invention is 1450 to 2100. More preferably, it is 1500-2000. Here, the cover factor is measured by the method described in Examples. If the cover factor is less than the above range, it is not preferable because it tends to fray. If it exceeds the above range, the texture becomes hard, which is not preferable, and in the bright yarn, if the density is excessive, transmission of light is hindered and dulls, and a clear color tends to be lost. In the present invention, unlike the round cross-section yarn, the cross-sectional shape of the synthetic multifilament single yarn used is difficult to slip and does not need to be excessively dense. In the ripstop structure, it is preferable that the cover factor of the heel portion excluding the lip portion is within the above range. The weaving is preferably carried out by a water jet which is common for down-proof high density fabrics with fineness, but may be air jet, rapier or the like. The cover factor of the finished fabric is preferably 1500 to 2200 for the purpose of obtaining a soft feel.

  The fabric of the present invention may be dyed and finished by a general process of down-proof fabric. For example, after continuous scouring and scouring, it is dyed and printed by a drying set, a liquid dyeing machine or a jigger dyeing machine, and water-repellent. A finishing agent such as an agent is applied and finished by calendering. The same process is adopted for any form of fabric, and the dyeing conditions may be selected according to the material. However, jigger dyeing of false twisted yarn fabric is preferably avoided because it loses stretchability, and dyeing with liquid flow dyeing is preferred. In addition to fluorine-based, silicon-based, and paraffinic water repellents, the fabric may be provided with finishing agents such as softeners, antistatic agents, water-absorbing (hydrophilic) agents, and antibacterial deodorants.

  The fabric of the present invention is calendered on one or both sides. The number of calendar processes may be only once or multiple times. Conventionally known conditions may be employed for the calendering temperature and pressure conditions. For example, the calendar condition is 200 ° C. for nylon woven fabric and 220 ° C. for polyester woven fabric, the fabric composition (single yarn shape and fineness, total fineness, fabric cover factor and structure), air permeability, tear strength In consideration of the texture, etc., the pressure, machining speed, number of times, etc. are adjusted.

  The preferable calendering conditions for nylon 6 fabric and copolyester fabric are a temperature of 190 to 130 ° C., a pressure of 0.98 MPa to 4.90 MPa, and a speed of 10 to 30 m / min. It is possible to process by expanding the range up to 220 ° C. only in the processing temperature. As for the material of the calendar, it is preferable that one roll is made of metal and the other roll is made of metal, paper, cotton, or resin. In the present invention, if the pressure force is excessive, the single yarn shape becomes too flat, which causes a reduction in irritation and tearing strength.Therefore, increase the number of times under mild conditions to reduce the target low air permeability and texture. It is preferable to obtain.

  The sliding resistance of the fabric obtained by the production method of the present invention is 0.8 mm or more and 3 mm or less under a load of 117 N according to JIS1096 8.23B method, and further 1.0 mm or more and 2.5 mm or less. Can do. Exceeding the above range, it becomes easy to cause a fray due to the weight of the backpack, rubbing with rocks, entanglement during washing, and the like. If it is less than the above range, the cover factor is increased, and it can be obtained by applying a hard finish, etc., but this can result in loss of hard texture and clear color.

The fabric obtained by the production method of the present invention is a fragile method, and has an air permeability of 1.5 cc / cm ² · s or less, preferably 1.0 cc / cm ² / s or less as an initial value before washing. Can be achieved. If the air permeability before washing is below the above range, it is suitable as a down proof side. Also, fabrics of the present invention is the Frazier method, after washing 10 times, 2.0cc / cm ² · s or less, preferably to achieve the following air permeability 1.5cc / cm ² · s. If the air permeability after 10 washings is in the above range, it can be said that the fabric does not fall out from the fabric being washed and is excellent in washing durability.

  Furthermore, as described above, the woven fabric of the present invention eliminates the irritation caused by the cross-sectional shape of the single yarn possessed by Patent Document 1 and the bending rigidity caused by the high degree of irregularity. While maintaining a low air permeability, a lightweight fabric with a soft texture and no irritation has been achieved. Therefore, the woven fabric of the present invention is extremely suitable as a downwear, a down jacket, a sleeping bag, and a futon side.

  The effects of the present invention are specifically shown by the following examples, but the present invention is not limited thereto. In addition, evaluation of the characteristic value in an Example was performed with the following method.

<Deformation degree>
Using a VH-Z450 type microscope and a VH-6300 type measuring machine (manufactured by KEYENCE), the major axis D (longest part diameter) and minor axis d (shortest part diameter) of the cross-sectional shape of the single yarn at a magnification of 1500 times ) Were measured (see FIG. 1). Then, (the major axis D) / (minor axis d) of the cross-sectional shape of the single yarn was calculated), and the average value of the five single yarns was defined as the degree of deformity of the single yarn.
<Linear rate>
A measuring machine for measuring irregularity, the length L of the straight line connecting the arc of the convex part of the single yarn and the arc of the concave part was measured with a magnification (FIG. 1), and the length L was divided by the radius D of the circumscribed circle of the single yarn value. The average value of 5 single yarns was defined as the linear rate of the single yarn.

<Fineness, breaking strength, breaking elongation, density, basis weight>
These evaluation items were measured according to the method described in JIS-L-1096.

<Expansion / restoration rate>
This evaluation item was measured based on the method described in JIS-L-1013 (boil 15 minutes treatment).

<Relative viscosity RV>
The reagent was dissolved in 96.3 ± 0.1% by mass of reagent grade concentrated sulfuric acid so that the polymer concentration was 10 mg / ml to prepare a sample solution. Using an Ostwald viscometer with a temperature of 20 ° C. ± 0.05 ° C. and a water fall time of 6 to 7 seconds, a drop time T1 (second) of 20 ml of the prepared sample solution at a temperature of 20 ° C. ± 0.05 ° C., And the drop time T0 (seconds) of 20 ml of reagent grade concentrated sulfuric acid of 96.3 ± 0.1% by mass used for dissolving the sample was measured. The relative viscosity (RV) of the material used was calculated by the following formula.
RV = T1 / T0

<Cover factor>
The cover factor of the woven fabric was calculated by the formula of warp √fineness T × finishing density (main / 吋) + weft √fineness × finishing density (main / に お け る) in the heel part. The density of the heel portion of the ripstop structure was also measured.

<Air permeability>
The air permeability of the woven fabric was measured according to the method described in JIS-L-1096 8.27.1 (Fragile method).

<Sliding resistance>
The sliding resistance of the fabric was measured under a load of 117 N in accordance with the method described in JIS-L-1096 8.23 B method.

<Washing durability>
The washing of the woven fabric was performed in accordance with JIS-L-0217 103 method. Washing 10 times is a case where washing-dehydration-drying is repeated 10 times. The drying method was line drying. The washing durability of the fabric was evaluated based on the air permeability and sliding resistance after 10 washings.

<Elongation rate of fabric>
The elongation percentage of the woven fabric was measured according to the method described in JIS-L-1096 8.16.1B method.

<Fabric grade (about irritability)>
The quality of FIG. 7a was set as A shown below, and the quality of FIG. 7b was set as D shown below. Five experienced evaluators visually evaluated the fabric and evaluated the following four levels.
A There is no irritability B There is some irritability C Some irritations are noticeable D illness is conspicuous

<Feeling>
Five experienced evaluators touched the fabric and evaluated the following four levels.
A very soft B slightly soft C slightly hard D very hard

<Comprehensive evaluation>
Passes yarns and fabrics with a fabric quality of B or higher, a texture of B or higher, air permeability after 10 washings of 1.5 cc or less, slip resistance, and weft of 3.0 mm or less. And yarns and fabrics outside this range were rejected.

Example 1
Bright 6 nylon 22T20f having a five-leaf cross section as shown in FIG. 2a (relative viscosity RV3.5, single yarn fineness 1.1 dtex (T), deformity 1.9, linear rate 0.22, breaking strength 5.8 cN / dtex Using a warp and weft having a break elongation of 48%), a taffeta with a cover factor of 1578 was woven and dyed and finished. The raw machine was desized by continuous scouring, dehydrated and dried, and liquid dyed using a dark blue acid dye. After the drying set, water repellent treatment is performed using a non-fluorine (paraffinic) water repellent, and calendering is performed twice at a temperature of 160 ° C., a pressure of 2.5 MPa, and a speed of 20 m / min. Using a roll), the cover factor was finished to 1689, and a woven fabric having a slip resistance of 1.9 mm, a weft of 2.0 mm, and a basis weight of 37.4 g / m ² was obtained. Table 1 shows the details of the evaluation results of the yarn and the fabric of Example 1. As shown in Table 1, not only the initial stage but also the low air permeability retention after washing 10 times was good, and the fabric quality and texture were satisfactory.

Example 2
In Example 1, a woven fabric was obtained through the same processing steps as in Example 1 except that the degree of irregularity of the single yarn was changed from 1.9 to 1.6 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn and the fabric of Example 2. The sliding resistance of the fabric is 2.0 mm and 2.1 mm, and there is no problem. As shown in Table 1, the air permeability retention, fabric quality and texture after washing 10 times are superior to those of Example 1 and sufficiently satisfactory. It was possible.

Example 3
In Example 1, a woven fabric was obtained through the same processing steps as in Example 1 except that the degree of irregularity of the single yarn was changed from 1.9 to 1.4 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn of Example 3 and the fabric. As shown in Table 1, there was no problem with the sliding resistance of the fabric of 2.2 mm and 2.3 mm, and as shown in Table 1, a fabric excellent in air permeability retention, fabric quality and texture after 10 washings was obtained. In particular, the texture was slightly softer than Example 2, but softer.

Example 4
In Example 1, the cross-sectional shape of the yarn was changed from five leaves to six leaves as shown in FIG. 2b (variant degree 1.9), and the linearity was changed as shown in Table 1, and the same as in Example 1 A fabric was obtained through the processing step. Table 1 shows details of the evaluation results of the yarn and the fabric of Example 4. As shown in Table 1, a woven fabric having the same performance as in Example 1 was obtained without any problem when the sliding resistance of the woven fabric was 2.2 mm and 2.2 mm.

Example 5
In Example 4, a woven fabric was obtained through the same processing steps as in Example 4 except that the degree of deformity was changed from 1.9 to 1.6 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn and the fabric of Example 5. As shown in Table 1, a woven fabric satisfying all the evaluation items was obtained with no problem when the sliding resistance of the woven fabric was a warp of 1.9 mm and a weft of 2.0 mm.

Example 6
In Example 4, a woven fabric was obtained through the same processing steps as in Example 4 except that the degree of deformity was changed from 1.9 to 1.3 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn and the fabric of Example 6. As shown in Table 1, a woven fabric satisfying all the evaluation items was obtained as shown in Table 1 with no problem when the sliding resistance of the woven fabric was 2.2 mm and 2.2 mm. In particular, the texture was slight, but softer than Example 5.

Example 7
In Example 1, except that the cross-sectional shape was changed from five leaves to eight leaves as shown in FIG. 2c, the deformity was changed from 1.9 to 1.8, and the linear ratio was changed as shown in Table 1. A woven fabric was obtained through the same processing steps as in No. 1. Table 1 shows details of the evaluation results of the yarn and the fabric of Example 7. As shown in Table 1, a fabric with excellent slipperiness resistance, fabric quality and texture after washing was obtained.

Example 8
In Example 7, a woven fabric was obtained through the same processing steps as in Example 7, except that the deformity was changed from 1.8 to 1.6 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn of Example 8 and the fabric. As shown in Table 1, the sliding resistance of the fabric is 1.9 mm and 2.2 mm, and as shown in Table 1, the low air permeability retention, color development, fabric quality, and texture after washing are the same as in Example 7. An excellent fabric was obtained.

Example 9
In Example 7, a woven fabric was obtained through the same processing steps as in Example 7, except that the deformity was changed from 1.8 to 1.3 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn of Example 9 and the fabric. As shown in Table 1, when the slip resistance of the fabric is 2.1 mm and 2.2 mm, an excellent fabric is obtained in the same manner as in Example 7 in terms of low air permeability retention, fabric quality and texture after washing. It was. In particular, the texture was slightly softer than in Examples 7 and 8, but softer.

Example 10
In Example 1, except that the cross-sectional shape was changed from five leaves to ten leaves as shown in FIG. 2d, the irregularity was changed from 1.9 to 1.7, and the linear ratio was changed as shown in Table 1. A fabric was obtained through the same processing steps as in No. 1. Table 1 shows the details of the evaluation results of the yarn and the fabric of Example 10. As shown in Table 1 when the sliding resistance of the fabric is 2.0 mm and 2.1 mm, a fabric with excellent low air permeability retention, color developability, fabric quality and texture after washing was obtained.

Example 11
In Example 10, a woven fabric was obtained through the same processing steps as in Example 10 except that the degree of deformity was changed from 1.7 to 1.5 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn of Example 11 and the fabric. As shown in Table 1, a fabric satisfying all the evaluation items was obtained as shown in Table 1 with no problem when the sliding resistance of the fabric was 2.1 mm and 2.1 mm.

Example 12
In Example 10, a woven fabric was obtained through the same processing steps as in Example 10 except that the degree of deformity was changed from 1.7 to 1.3 and the linearity ratio was changed as shown in Table 1. Table 1 shows the details of the evaluation results of the yarn of Example 12 and the fabric. As shown in Table 1, a woven fabric satisfying all the evaluation items was obtained as shown in Table 1 without any problem when the sliding resistance of the woven fabric was 2.2 mm and 2.4 mm. In particular, the texture was slightly softer than Example 10, but softer.

Comparative Example 1
In Example 1, a woven fabric was obtained through the same processing steps as in Example 1 except that the Y-shaped cross-sectional shape (see FIG. 3a) having an irregularity of 3.0 was changed and the linearity ratio was changed as shown in Table 1. It was. Table 1 shows the details of the evaluation results of the yarn and the fabric of Comparative Example 1. There was no problem with the sliding resistance of the fabric of 1.8 mm and 2.0 mm, but as shown in Table 1, it was excellent in low air permeability retention after washing, but it had an irritated quality and wind. The combination was hard and inferior to the above-mentioned Example group. These disadvantages are thought to be due to sharp deformity and high linearity.

Comparative Example 2
In Example 1, the woven fabric was processed through the same processing steps as in Example 1 except that the profile was changed to a cross-sectional shape of 3.0 (see FIG. 3b) and the linearity was changed as shown in Table 1. Obtained. Table 1 shows details of the evaluation results of the yarn and the fabric of Comparative Example 2. Although there was no problem with the sliding resistance of the fabric of 1.9 mm and weft of 1.9 mm, as shown in Table 1, it was excellent in low air permeability retention after washing as in Comparative Example 1, but the fabric quality, wind It was inferior. It is considered that the quality of the fabric and the poor texture are due to the same reason as in Comparative Example 1.

Comparative Example 3
In Example 1, the woven fabric was processed through the same processing steps as in Example 1 except that the profile was changed to a five-leaf type cross-sectional shape of 2.5 (see FIG. 3c) and the linearity was changed as shown in Table 1. Obtained. Table 1 shows the details of the evaluation results of the yarn and the fabric of Comparative Example 3. The sliding resistance of the fabric was 1.8 mm in warp and 1.9 mm in weft, but there was no problem, but as shown in Table 1, it was excellent in low air permeability retention after washing as in Comparative Example 1, but the Comparative Example Although the textile quality was slightly improved as compared with 1 and 2, it was unsatisfactory including the texture.

  The disadvantages of Comparative Examples 1, 2, and 3 are due to the sharpness of the cross-sectional shape and the high linearity due to the high degree of irregularity. The reason for this is thought to be the cause of stiffness due to the increase in the number of parts, which causes irritation, and because the meshing between the single yarns is deep, it is difficult to move between the single yarns even if they are twisted.

Comparative Example 4
In Example 1, a woven fabric was obtained through the same processing steps as in Example 1, except that the shape was changed as shown in FIG. Table 1 shows details of the evaluation results of the yarn of Comparative Example 4 and the fabric. There was no problem with the sliding resistance of the fabric of 1.9 mm and 1.9 mm, but as shown in Table 1, it has excellent low air permeability after washing, and the fabric quality compared to Comparative Examples 1 and 2. Although the texture was slightly improved, it was not satisfactory but not satisfactory. Although it is a low profile, it is thought to be caused by a high linear rate. From this, it can be seen that a woven fabric satisfying the quality and texture cannot be obtained unless the profile is low as in Examples 1 to 12 and the linearity is low.

Comparative Example 5
In Example 1, a woven fabric was obtained through the same processing steps as in Example 1 except that the shape of the yarn was changed from a five-leaf to a round cross section (degree of irregularity 1.0). Table 1 shows details of the evaluation results of the yarn and the fabric of Comparative Example 5. The sliding resistance of the fabric was 2.0 mm and 2.2 mm, and there was no problem. As shown in Table 1, the fabric quality and texture were excellent, but the low air permeability after washing was poor. It was. It is considered that due to stagnation and rubbing during washing, the single yarn that was restrained in the fabric separated and moved, the structural form before washing could not be maintained, and the air permeability increased. It turns out that the shape which does not have the meshing structure of single yarn like the comparative example 5 is unsuitable for a low air permeability fabric.

Example 13
In Example 2, the woven fabric was subjected to the same processing steps as in Example 2 except that the yarn was changed from 22T20f (single yarn fineness 1.1 dtex (T)) to 22T36f (single yarn fineness 0.6 dtex (T)). Obtained. Table 2 shows the details of the evaluation results of the yarn and the fabric of Example 13. There is no problem when the sliding resistance of the fabric is 1.9 mm and 2.0 mm, and as shown in Table 2, the performance should be satisfactory in the same manner as in Example 2. In particular, the texture is a softer fabric. became.

Example 14
In Example 2, the yarn was changed from 22T20f (single yarn fineness 1.1 dtex (T)) to 11T10f (single yarn fineness 1.1 dtex (T)), and the cover factor of the finished fabric was adjusted to that of Example 2, and the calendar was changed. A woven fabric was obtained through the same processing steps as in Example 2 except that the temperature was changed from 160 ° C. to 180 ° C. from 2 times to 1 time. Table 2 shows details of the evaluation results of the yarn and the fabric of Example 14. The sliding resistance of the fabric was 2.1 mm and 2.0 mm, and there was no problem. The fabric weight was light at 26.2 g / m ² and all the performances were satisfied as shown in Table 2.

Example 15
In Example 5, the yarn was changed from 22T20f (single yarn fineness 1.1 dtex (T)) to 22T12f (single yarn fineness 1.8 dtex (T)), and the calendar temperature was changed from 160 ° C. to 180 ° C. A woven fabric was obtained through the same processing steps as in Example 5. Table 2 shows details of the evaluation results of the yarn of Example 15 and the fabric. There was no problem with the sliding resistance of the fabric of 2.2 mm and 2.3 mm, and as shown in Table 2, although the texture was slightly harder than in Example 5, a fabric with satisfactory performance was obtained. It was.

Example 16
In Example 5, the yarn was changed from 22T20f (single yarn fineness 1.1 dtex (T)) to 56T48f (single yarn fineness 1.2 dtex (T)), the cover factor was changed as shown in Table 2, and the calendar temperature was 160. A fabric was obtained through the same processing steps as in Example 5 except that the temperature was changed from 180C to 180C. Table 2 shows details of the evaluation results of the yarn of Example 16 and the fabric. The sliding resistance of the fabric was 2.4 mm and 2.3 mm, and there was no problem and the basis weight was 68.9 g / m ^2. However, as shown in Table 2, the texture was slightly harder than Example 5. However, a woven fabric having satisfactory performance was obtained.

Comparative Example 6
In Example 5, the yarn was changed from 22T20f (single yarn fineness 1.1 dtex (T)) to 22T8f (single yarn fineness 2.8 dtex (T)), and the calender temperature was changed from 160 ° C to 180 ° C. A woven fabric was obtained through the same processing steps as in Example 5. Table 2 shows details of the evaluation results of the yarn of Comparative Example 6 and the fabric. As shown in Table 2, the quality was slightly inferior to that of Example 5, the texture was clearly hard, and the fabric was unsatisfactory. These defects are considered to be caused by the thickness of the single yarn fineness.

Example 17
In Example 5, a woven fabric was obtained through the same processing steps as in Example 5 except that the cover factor of the green machine was changed from 1578 to 1495. Table 3 shows details of the evaluation results of the yarn and the fabric of Example 17. The cover factor of the obtained woven fabric was 1595, the basis weight was 35.2 g / m ² , and the sliding resistance of the woven fabric was 2.3 mm and 2.4 mm, and there was no problem. As shown in Table 3, it was lighter than Example 5. Thus, although the low air permeability retention and the sliding resistance after washing were somewhat reduced, the performance was sufficient, and the fabric quality and texture were as good as in Example 5.

Example 18
In Example 5, a woven fabric was obtained through the same processing steps as in Example 5 except that the cover factor of the green machine was changed from 1578 to 2075 and the calendar temperature was changed from 160 ° C to 180 ° C. Table 3 shows the details of the evaluation results of the yarn of Example 18 and the fabric. The cover factor of the obtained woven fabric is 2204, the basis weight is 48.9 g / m ² , and the sliding resistance of the woven fabric is 1.1 mm and the weft is 1.2 mm, and there is no problem. Although it was inferior to 5, it was a fabric sufficiently satisfying the fabric quality and the low air permeability retention after washing.

Comparative Example 7
In Example 5, a woven fabric was obtained through the same processing steps as in Example 5 except that the cover factor of the green machine was changed from 1578 to 1315. Table 3 shows details of the yarn, fabric and evaluation results of Comparative Example 7. The cover factor of the obtained woven fabric was 1407, the basis weight was 31.2 g / m ² , the sliding resistance was 5.2 mm, and the weft was 5.6 mm, and it was unacceptable. However, it was an unsatisfactory woven fabric with insufficient air permeability before washing and lacking practicality.

Comparative Example 8
In Example 5, a woven fabric was obtained through the same processing steps as in Example 5 except that the cover factor was changed from 1578 to 2200 and the calendar temperature was changed from 160 ° C to 180 ° C. Table 3 shows details of the evaluation results of the yarn of Comparative Example 8 and the fabric. Although the obtained fabric has a cover factor of 2290, a basis weight of 51.0 g / m ² , a sliding resistance of 1.2 mm and a weft of 1.0 mm, there is no problem, but as shown in Table 3, the quality of the fabric and the low air permeability The fabric was unsatisfactory although it was excellent in retention but had a hard texture.

Example 19
A pin false twisted yarn was prepared using the nylon 6 base yarn of Example 5 (degree of irregularity 1.6). The false twisting conditions were such that the number of false twists was 4200 tpm, the false twisting temperature was 165 ° C., the false twisting speed was 70 m, and the overfeed rate was −3.33 spinners so that the cross-section deformation was small and crimpability was easily obtained. . The stretch recovery rate of the false twisted yarn was 34.2%. The single yarn of the false twisted yarn had an elliptical cross section and an irregularity of 1.8. The false twisted yarn was used for warp and weft to weave a cover fabric with a cover factor of 1672. Thereafter, a woven fabric was obtained through the same processing steps as in Example 1. Thereafter, a shrink surfer with a temperature of 160 ° C. and a processing speed of 20 m was passed through to reduce the binding force in the fabric. Table 4 shows details of the evaluation results of the raw yarn and the fabric of Example 19. The cover factor of the obtained fabric was 1923, the basis weight was 42.5 g / m ² , the sliding resistance was 1.3 mm and the weft was 1.5 mm, and there was no problem. A fabric with good low air permeability was obtained at the initial stage and after 10 washings. Moreover, the elongation percentage in the weft direction of the fabric was 11.4%. It is a false twisted yarn fabric that has crimpability and is difficult to obtain a low air permeability. Example 19 has good low air permeability and low air permeability after washing under relatively low calendering conditions. It is considered that the engagement between the single yarns is promoted more than that shown in FIG. 6a at the false twisting yarn stage, and the single yarns form a structure that is relatively difficult to separate.

Comparative Example 9
A pin false twisted yarn was prepared under the same conditions as in Example 19 using the nylon 6 base yarn of Comparative Example 1 (cross-sectional shape Y-shaped, degree of profile 3.0). The stretch recovery rate of the false twisted yarn was 22.6%. The single yarn of the false twisted yarn had a deformity of 3.3. The expansion / contraction recovery rate lower than that of Example 19 is considered to be due to the single yarn shape having a high degree of irregularity and weak recovery from twisting during false twisting. In addition, there were many yarn breaks and fluffs during false twisting, which are considered to be caused by a high degree of deformation, and the operability was not preferable. Next, the false twisted yarn was used as the background to obtain a woven fabric similar to Example 19, and a woven fabric was obtained through the same processing steps. Table 4 shows details of the evaluation results of the raw yarn and the woven fabric of Comparative Example 9. Although the obtained fabric had a basis weight of 39.5 g / m ² and the fabric slip resistance was 1.9 mm and 2.2 mm, there was no problem, but the cover factor was 1880 and the processing shrinkage was insufficient. As shown in Table 4, the low air permeability retention after washing of the fabric is good, but it is of an irritating quality, the texture is slightly hard, and the elongation in the weft direction of the fabric is only 7.2%, which is unsatisfactory. It was a woven fabric. It is speculated that the Iraki quality is due to the effects of high deformity and high linearity before false twisting because it is difficult to impart crimpability by false twisting.

Comparative Example 10
A pin false twisted yarn was prepared under the same conditions as in Example 19 using the nylon 6 base yarn of Comparative Example 5 (degree of irregularity 1.0). The stretch recovery rate of the false twisted yarn was 38.2%. The single yarn of the false twisted yarn was deformed into a hexagonal shape with a long cross section, and the degree of deformity was 1.2. Next, the false twisted yarn was used as the background to obtain a woven fabric similar to Example 19, and a woven fabric was obtained through the same processing steps. Table 4 shows details of the evaluation results of the raw yarn and the fabric of Comparative Example 10. Elongation rate in the weft direction of the fabric is 13.9%, which is excellent in fabric quality and texture. It was a woven fabric. This is presumably because there is no meshing of single yarns that act hard to separate against stagnation and rubbing.

From Tables 1 to 4, it was confirmed that the woven fabric satisfying the conditions of the present invention has both low air permeability retention after washing, woven fabric quality, and soft texture. The following were also confirmed.
-A thread with a round cross-section is excellent in color development, fabric quality, and texture, but lacks low air permeability maintenance after washing. In addition, the yarn having a cross-sectional shape with a high degree of irregularity has good low air permeability after washing, but exhibits an irritating quality and a hard texture.
-By changing the cross section of the single yarn to a low profile and making the shape a multi-leaf shape with 5-10 convex portions, the fabric quality and texture can be improved while maintaining low air permeability.
・ Even with a multi-leaf cross-sectional shape, if the degree of deformity is high, the quality of the fabric deteriorates and the texture becomes hard.
-If the number of convex parts on the multi-leaf cross section is large, the fabric quality and texture tend to be good.
・ The same applies to false twisted yarn.

  According to the production method of the present invention, it is possible to provide a light-weight woven fabric having no softness and soft feeling while maintaining a low air permeability even after repeated wearing and after washing. It is extremely suitable for side areas such as down jackets, sleeping bags, and futons.

  In FIG. 1a, D indicates the radius of the circumscribed circle, and d indicates the radius of the inscribed circle. L represents the length of the straight line connecting the arc of the convex part and the arc of the concave part.

Claims (6)

After weaving a woven fabric having a cover factor of 1450 to 2100 using a synthetic multifilament that satisfies the following conditions (i) to (iii), the fabric is dyed or printed, then subjected to a water-repellent finish, It is characterized in that both sides are calendered so that the multi-lobed convex portion of the cross section of the single yarn of the synthetic multifilament is in contact with the multi-lobed concave portion of the cross section of the adjacent single yarn. A method for manufacturing a woven fabric.
(I) The single yarn fineness is 0.5 to 2.0 dtex, and the total fineness is 6 to 67 dtex;
(Ii) The single yarn has a multi-lobed cross section in which round-shaped convex portions having substantially the same shape and round-shaped concave portions having the same shape are alternately and continuously formed. The number is 5-10;
(Iii) The multi-leaf shape irregularity (radius D of circumscribed circle / radius d of inscribed circle) of the cross section of the single yarn is 1.3 or more and less than 2.0. The method for producing a woven fabric according to claim 1, wherein a synthetic multifilament that further satisfies the following condition (iv) is used:
(Iv) The linear ratio L / D of the multi-leaf shape of the cross section of the single yarn is 0 or more and 0.30 or less, where the linear ratio L / D is the convexity in the multi-leaf shape of the cross section of the single yarn It refers to the ratio of the length L of the straight line connecting the arc and the arc of the recess to the radius D of the circumscribed circle of the single yarn.   The method for producing a woven fabric according to claim 1 or 2, wherein the number of convex portions in the multi-leaf shape of the cross section of the single yarn of the synthetic multifilament used is 5 to 8.   The method for producing a woven fabric according to any one of claims 1 to 3, wherein the multi-leaf shape irregularity of the cross section of the single yarn of the synthetic multifilament used is 1.3 or more and 1.9 or less.   The method for producing a woven fabric according to any one of claims 2 to 4, wherein the linear rate of the multileaf shape of the cross section of the single yarn of the synthetic multifilament used is 0 or more and 0.28 or less.   The woven fabric according to any one of claims 1 to 5, wherein the woven fabric is used for any side selected from the group consisting of downwear, down jackets, sleeping bags, and futons. Production method.