JP4064251B2 - Slide fastener tape - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tape for a slide fastener obtained by woven knitting, and specifically has a so-called regular packer configuration in which a fastener stringer to which an element is attached through strong pulling and various heat treatments is slightly recessed on the element attachment side. The present invention relates to a slide fastener tape in which the slight recess is absorbed by contraction of the tape body during sewing, and the entire surface of the tape body or the surface to be sewn is sewn and integrated evenly and flatly without undulation.
[0002]
[Prior art]
A slide fastener tape (hereinafter referred to as a fastener tape) has a large number of elements that are meshed with a mating element along one side edge of the tape, and a slider is inserted through the element row. This is a tape dedicated to slide fasteners, which are attached to the end of the row after sewing the upper and lower stoppers to produce the required length of slide fasteners and then sewing them on clothes and various bags.
[0003]
The fastener tape has a tape main body part and an element attachment edge part provided on one side edge side thereof. In order to stabilize the attachment form of each element and increase its attachment strength, this element attachment edge has a core cord that is thicker than other warps along the longitudinal direction of the tape simultaneously with the weaving and knitting of the tape. Woven or knitted.
[0004]
Due to the difference in structure and structure between the tape main body and the element mounting edge, the element mounting edge where the core string is arranged generally has a smaller thermal contraction rate than the tape main body. As a result, fastener tapes that have undergone various heat treatment processes tend to produce a so-called reverse packer having a bow shape in which the tape main body portion is greatly contracted and the element mounting edge portion is convex outward.
[0005]
On the other hand, when mounting metal elements or synthetic resin elements, large tension is applied to the element mounting edge of the fastener tape to ensure a constant element mounting pitch. The element is attached with the part extended. As a result, even after the tension is released, the part where the element is attached does not return to its original length, and the element attachment edge side of the fastener tape protrudes further to the outside, and the reverse packer form tends to become larger and larger. . This tendency is particularly remarkable in the case of a slide fastener that requires flexibility and stretchability.
[0006]
In order to solve these problems, for example, according to Japanese Patent Publication No. 59-51807, in a fastener tape having a double-sided knitted structure, a textured yarn is adopted as a constituent yarn of the tape main part, and an element is attached. It is proposed that a core string covered with a leather thread connected from the main part of the tape is arranged at the edge, and the boiling water shrinkage rate of the core string is set to be larger than the boiling water shrinkage rate of the textured yarn. .
[0007]
By adopting such a configuration, even if heat treatment is performed, due to the difference in thermal contraction rate between the element mounting edge and the tape main body, the element mounting edge has a curved shape that is concave inward, so-called a normal packer shape. Although it is put in the situation, even if the element mounting edge portion contracts, the stretchability of the tape main body portion follows it, so that a fastener stringer is obtained in which linearity is maintained after the element is mounted. As a result, it can be attached in a state familiar to flexible and stretchable clothing.
[0008]
On the other hand, in the case of a fastener tape composed of a normal woven structure, if the non-stretchable yarn used in a normal fastener tape material is used, the tape main body is not stretchable based on the fabric structure. When a packer is generated on the fastener tape, the fastener stringer cannot correct the packer form to a linear form, and when sewing this onto a subsequent piece of clothing, not only is the sewing complicated, but also after the sewing, The attached slide fastener does not become flat in the longitudinal direction but exhibits a wavy state, and the occurrence of defective products increases.
[0009]
In order to solve this problem, for example, according to Japanese Patent Application Laid-Open No. 2002-209613, in a tape for a slide fastener having a tape main part obtained by weaving and an element mounting edge part in which a core string is woven, The ground warp used for the main part of the tape is composed of a textured yarn having a lower thermal shrinkage than other warps, and the core string has a multifilament having a high boiling water shrinkage rate. The slide is characterized by comprising a textured yarn having a boiling water shrinkage rate of a warp yarn adjacent to the core yarn that is higher than a boiling water shrinkage rate of a ground warp yarn used for the tape main body and lower than a boiling water shrinkage rate of the core string. Proposes fastener tapes.
[0010]
The zipper tape has a reverse packer shape in which the element attachment edge slightly protrudes outward and curves due to the difference in the woven structure between the tape main part and the element attachment edge when the fabric is finished. When short-time dry heat setting is performed on such a fastener tape, the shrinkage amount of the element attachment edge and the shrinkage amount of the warp arranged on the tape main body are hardly changed, and the shrinkage amount of the element attachment edge is slightly changed. Therefore, there is no reverse packer when weaving, and the entire fastener tape is almost linear.
[0011]
Subsequently, the amount of shrinkage of the fastener tape due to dyeing decreases in the order of the core string, the warp adjacent to the core string, and the main part of the tape. A bias occurs in which the main body side is wavy. In this state, when the fastener element is attached, a large tension is particularly applied to the element attachment edge. Therefore, although the element attachment edge portion is extended by the tension at the time of element attachment, the extension is smaller than the contraction amount due to heating, and the element attachment edge portion is made substantially linear. On the other hand, when the element is attached, the tape main body does not stretch, so that the biased state is maintained.
[0012]
In this manner, the boiling water shrinkage rate of the core string at the element attachment edge of the fastener tape is made larger than the boiling water shrinkage rate of the warp yarn adjacent to the inside of the core string, and the heat between the element attachment edge and the tape main part is increased. Since the shrinkage difference is changed stepwise, stepwise shrinkage behavior does not occur in the boundary region between the element mounting edge and the tape main body. When this slide fastener is sewn on the product to be sewn, since the element attachment edge of the fastener stringer is linear, the sewing operation can be performed accurately, and the wavy state does not occur in the longitudinal direction in the slide fastener even after sewing. It will be a beautiful product.
[0013]
[Patent Document 1]
Japanese Patent Publication No.59-51807
[Patent Document 2]
JP 2002-209613 A
[0014]
[Problems to be solved by the invention]
By the way, when the slide fastener chain is sewn on the sewing product, the fastener tape that is sewn particularly contracts due to the tension of the sewing thread. Therefore, as in Patent Documents 1 and 2, when the packer is not generated in the slide fastener before sewing, and the element row and the fastener tape are linear shapes included in the same plane, the sewing line The zipper tape tends to be wavy, especially when the product to be sewn is flexible, such as thin knitted products and thin fabrics. Connected.
[0015]
The present invention has been made to solve such problems, and a specific object thereof is to provide a fastener tape for a woven and knitted slide fastener capable of obtaining a beautiful sewing product regardless of the hardness and softness of the sewing product. There is.
[0016]
[Means for solving the problems and effects]
  The object is a tape for a slide fastener, which is a basic structure of the present invention, and has a tape main part obtained by weaving and an element mounting edge part in which a core string is woven or knitted. ,Each elongation recovery rate R represented by the following formula (1) based on the yarn length measured according to JIS L1096 is the element mounting edge. (4,14) Core string (7a, 7b, 17) Element mounting edge that extends in the warp direction adjacent to the outside (4,14) Constituent yarn (6o, 6a, 6b, 16a, 16p) , The core string (7a, 7b, 17) , And all other constituent yarns extending in the warp direction (6c ~ 6n, 6o-1,6o-2,16a ~ 16n) This is achieved by setting smaller in order..
[0017]
This fastener tape, when weaving or knitting, due to the difference in the structure of the tape main portion and the element mounting edge, and the difference in elongation recovery rate R of the constituent yarns of the tape main portion and the element mounting edge, The element mounting edge is almost linear and the tape main body is slightly wavy. Under such a configuration, even if dry heat setting and high-temperature dyeing are performed for a short time, the shrinkage amount of the element mounting edge and the shrinkage amount of the constituent yarn extending in the warp direction of the tape main portion are almost the same. Sometimes, the form when weaving and knitting does not change significantly.
[0018]
In this state, when the fastener element is attached, the fastener tape is strongly pulled together with the main body portion and the element attachment edge portion. In particular, the element attachment edge portion is relatively strongly pulled. Both the element mounting edge and the tape main body are stretched by the tension at the time of element mounting, but the elongation recovery rate R of the constituent yarn arranged on the outer side of the core string of the element mounting edge is set to the longitudinal direction of the tape main body. Is larger than the elongation recovery rate R of the constituent yarn extending to the element, but the element mounting edge is close to the original length, but one tape main body has a small return and the element mounting edge side is recessed. It becomes the shape of a regular packer that curves in an arcuate shape, and the tape main part is in a wavy state.
[0019]
When the fastener tape portion of the slide fastener having such a form is sewed on the sewing product, the tape main portion becomes flat due to the sewing shrinkage that occurs at the time of sewing, and the sewing is well adapted to the sewing product and is sewn. That is, a beautiful product is obtained in which the wavy state does not occur in the longitudinal direction even after the slide fastener is sewn.
[0020]
The elongation recovery rate R at this time can be obtained from the following equation (1) by measuring each yarn length according to JIS L1096. Accordingly, the elongation recovery rate R of the constituent yarn disposed on the outer side of the core string of the element attachment edge in the present invention is a relative value with the elongation recovery rate R of the other constituent yarns. Although it is difficult to determine, the elongation recovery rate R of the constituent yarns arranged on the outside of the core string at the element attachment edge portion is more than 85% because it is easy to set higher than other materials. desirable. The elongation recovery rate R of ordinary multifilaments and monofilaments is at most 80%.
R = {(L1-L2) / (L1-L0)} × 100 (1)
However, L0 shows the original yarn length, L1 shows the yarn length when pulled under a predetermined tension, and L2 shows the yarn length after recovery under no tension.
[0021]
To measure the yarn length according to JIS L1096, use a tensile tester or a device with equivalent performance, fix one end of the test piece with the upper clamp, apply the initial load to the other end, and position 20 cmk from the lower end of the test piece clamp. Mark Next, a load of 14.7 N (1.5 kgf) is gently applied and left for 1 hour, and then the length between the marks is measured. Next, the load was removed, the initial load was applied 30 seconds and 1 hour later, the length between the marks was measured again, and the elongation recovery rate R (%) was obtained by the above formula (1). After 30 seconds and 1 hour The average value of 3 times is calculated for each.
[0022]
  The elongation recovery rate R is arranged to extend in the warp direction of the constituent thread of the element mounting edge, the core string, and the tape main part, which are arranged to extend in the warp direction adjacent to the outside of the core string. In order of all other constituent yarnsSet. When such a configuration is adopted, when the fastener tape is evenly stretched and then placed in an unloaded state, the constituent yarns of the element mounting edge arranged to extend in the warp direction adjacent to the outside of the core string Stretch recovery behavior without any step between these yarns, trying to return to the original length in the order of all the other constituent yarns arranged extending in the warp direction of the core string, the tape main part, When the slide fastener is sewn to the product to be sewn, the wavy state of the tape main part absorbs the shrinkage at the time of sewing, and the sewing work is performed. It can be easily and accurately, and a beautiful product can be obtained even after sewing.
[0023]
In the present invention, the thickness of the single yarn having a large elongation recovery rate R is set to be thicker than the thickness of the single yarn of the constituent yarns arranged extending in all other warp directions. Is desirable. If the thickness of a single yarn having a large elongation recovery rate R is thicker than the thickness of a single yarn of the constituent yarns that extend in all other warp directions, the recovery rate after elongation is even greater. Thus, even if the reverse packer form until the element is attached is remarkable, the element can be reliably transformed into a slight forward packer form after the element is attached.
[0024]
As a typical material of the yarn having a high elongation recovery rate R, a condensed polymer of nylon or n-propanediol and terephthalic acid can be exemplified, and the warp direction in the tape main portion other than these yarns. It is preferable to use a multifilament yarn made of polyester for all the other constituent yarns extending to the length because a significant difference can be given to the elongation recovery rate R between them. Here, in the case of fastener tapes obtained by weaving, it is preferable to use textured yarns for all warp yarns used for the element mounting edge and the tape main part, so that misalignment can be prevented. Then, since there is no worry of misalignment, it is not always necessary to use a textured yarn.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an example of a fabric structure of a fastener tape which is a typical embodiment of the present invention. In addition, although the fabric structure in this figure is shown roughly for illustration, it is actually a dense structure.
[0026]
Since this type of weaving fastener tape 1 is usually woven by a narrow loom called a needle loom, as shown in FIG. 1, one yarn reciprocates within one opening of warp. Thus, weft insertion is made as a set of wefts 2 in a state where the two are aligned. In this figure, the two aligned yarns 2a and 2b constituting a set of wefts 2 inserted in the weft are shown separated from each other in the vertical direction, but in actuality they are in close contact with each other. The loop end formed at the turn-back end of the weft 2 is entangled with the loop end of the weft 2 (not shown) to be made next time using a non-illustrated needle to form an ear portion on one side edge of the fastener tape 1. . A fastener element 3 is attached to an edge portion opposite to the ear portion formed by entwining the loop end of the weft yarn 2 as indicated by a virtual line in FIG.
[0027]
That is, the fastener tape 1 is on an edge portion on the opposite side to an unillustrated ear portion formed by entwining the loop end of the weft yarn 2, and the element attachment edge portion 4 to which the fastener element 4 is attached. , And a tape main body 5 from the element mounting edge 4 to the ear (not shown) on the opposite side. As the yarns 2a and 2b constituting the weft 2 in the present embodiment, a thin textured yarn made of 330 dTex polyester is used.
[0028]
The two warp yarns 6a and 6b arranged on the outer side adjacent to the element mounting edge 4 in the illustrated example have nylon multifilaments that are thicker than the other warp yarns 6c, 6d, 6e,. Two core strings 7a and 7b are arranged adjacent to the inside of the two warp yarns 6a and 6b, and two yarns adjacent to the inside of the same core strings 7a and 7b are arranged. The element attachment edge 4 is configured by arranging two sets of warp yarns 6c to 6f made of a textured yarn of polyester that are arranged to form a set of warp yarns.
[0029]
Further, a large number of ground warp yarns 6g, 6h,..., 6m, 6n are arranged on the tape main portion 5 from the inside to the ear portion. These ground warp yarns 6g, 6h,..., 6m, 6n are also woven in sequence by pulling two pieces together. Two thin warps 6o-1 and 6o-2 arranged on the outer side of the two warps 6a and 6b arranged on the outer side adjacent to the element mounting edge 4 are connected to the element mounting edge 4 It has the function to hold | maintain the form of the edge. According to the present embodiment, the entire structure excluding the core strings 7a and 7b is a plain weave structure when two warp yarns are used as one set.
[0030]
Incidentally, the two warp yarns 6a and 6b having a high elongation recovery rate R, which are disposed adjacent to each other on the element attachment edge portion 4 of the fastener tape 1 according to the present embodiment and have a high elongation recovery rate R, each have a thickness of 470 dTex. The two core strings 7a and 7b are made of three polyester multifilament yarns of 560dTex each made of raw yarn, and the periphery thereof is a 267dTex knitting yarn. A coated yarn is used, and a textured yarn made of 330 dTex polyester is used for each warp 6c, 6d,..., 6m, 6n of the element mounting edge 4 on the tape main body side. Further, a textured yarn made of 235 dTex polyester is used for the two thin warps 6o-1 and 6o-2 arranged on the outermost side of the element mounting edge 4.
[0031]
In the present invention, in order to form a normal packer shape in which the element mounting edge 4 is slightly recessed and curved without producing a reverse packer at the time of manufacturing the fastener stringer, it is adjacent to the outside of the core cords 7a and 7b. It is important that the warp yarns 6a, 6b arranged in this manner do not expand even when the fastener element is injected and due to the hydraulic pressure in the dyeing process. The above-mentioned two warp yarns 6a, 6b having a high elongation recovery rate R have an elongation recovery rate R of 94.3%, and the warp yarns 6c, 6d,. The recovery rate R is 67.0%, the elongation recovery rate R of the core cords 7a, 7b is 73.1%, two warps 6a, 6b, core cords 7a, 7b adjacent to the outside of the element mounting edge, tape In the order of warps 6c, 6d,..., 6m, 6n arranged on the main body side, the elongation recovery rate R is gradually reduced.
[0032]
Furthermore, the core strings 7a and 7b have a boiling water shrinkage rate of 15%, which is extremely large compared to other yarns, and the heat set shrinkage is greatly increased from the conventional 5% to 7%. The elongation recovery rate R of the two thin warps 6o-1, 6o-2 arranged on the outermost side of the element mounting edge 4 is also the warps 6c, 6d,..., 6m, arranged on the tape main body side. The same as the elongation recovery rate R of 6n.
[0033]
In the present invention, in order to prevent the reverse packer from being generated during the manufacture of the fastener stringer, the core cords 7a and 7b can ensure high shrinkage, and the element attachment edge after passing through the dyeing process of the fastener tape 1 It is also important to keep the tape elongation at the portion 4 side small and prevent the core string portion from being stretched when a fastener element (not shown) is injected. For this reason, the structure of the core strings 7a and 7b is similar to the core string structure disclosed in Japanese Utility Model Publication No. 55-21605, for example. Are covered with a knitted tube obtained by crossing each other. At the same time, in the present embodiment, 330 dTex × 2 raw silk multifilaments made of polyester are used for the core material, and the boiling water shrinkage rate is set to a high shrinkage rate of 15%.
[0034]
By adopting the above-mentioned woven structure and different warp used in the present embodiment, the fastener tape 1 undergoes a change in form as shown in FIG. 3A to FIG. At the time of attaching the element, a form in which the fastener stringer 8 is generated, in particular, a positive packer that is slightly recessed and curved on the element attaching edge 4 side, is obtained. The slight wavy state is corrected, and a beautiful sewing form can be easily obtained.
[0035]
This will be described in detail with reference to FIG. 3. First, in the woven fastener tape 1, all the warps 6o-1, 6o-2, 6a, 6b,..., 6m, 6n and the core strings 7a, 7b are the same. Assuming that the warp yarns 6a and 6b having a high elongation recovery rate R return almost to their original lengths, the other warp yarns 6o-1, 6o-2,. The strings 7a and 7b do not return to their original lengths, and as a whole, the strings 7a and 7b are woven in the form of an arcuate regular packer in which the element mounting edge 4 side is slightly recessed inward as shown in FIG. However, at the time of weaving, the element mounting edge 4 is substantially linear due to the difference in the thread use and the structure of the element mounting edge 4 and the tape main body 5, and the tape main body 5 has a minute wavy shape. This is the extent to which a bias has occurred.
[0036]
The fastener tape 1 obtained in this way is dyed. In this dyeing, the fastener tape 1 is usually wound around a dyeing beam (not shown), and the whole beam is immersed in a dyeing solution circulating in the dyeing machine and dyed at a high temperature. Therefore, uniform dyeing cannot be performed unless the fastener tape 1 is evenly wound around the beam. Therefore, heat setting is once performed on the fastener tape 1 having a woven packer shape as described above under dry heat. At this time, a uniform tension is applied to the fastener tape 1 and the heat is linearly set to ensure uniform winding around the beam.
[0037]
For dyeing, when this woven tape is heat set for 1 minute under dry heat of 180 ° C., for example, the core strings 7a and 7b contract. As shown, the core strings 7a and 7b have not completely contracted yet, and the difference in contraction between the element mounting edge 4 and the tape main body 5 at the time of heat setting is extremely small, and the bias of the tape main body 5 is almost not. Not obvious.
[0038]
Next, when the fastener tape 1 is immersed in a high-pressure dyeing solution at 130 ° C. and dyeing is performed for 40 minutes, the element mounting edge 4 is most contracted, and then the core string 7a, 7b is contracted in this order to form the main part of the tape. As shown in FIG. 3C, the normal packer form becomes clear, and at the same time, it can be seen visually that a wavy bias occurs in the tape main body 5.
[0039]
Following dyeing, the fastener element E is injection molded at a high temperature and integrated with the element mounting edge 4 of the fastener tape 1. At the time of this injection molding, a uniform tension is applied to make the fastener tape 1 straight, and the element attachment edge 4 is stretched by applying the largest tension. When the molding is finished and the tension is released, the elongation of the element mounting portion of the element mounting edge 4 is not recovered, but the tape portion between the elements is largely expanded or recovered. At this time, the expansion and recovery of the core strings 7a and 7b and the tape main part 5 are small, and due to the difference in the recovery rate R, the warps 6a and 6b, the core strings 7a and 7b adjacent to the outside of the core strings 7a and 7b, the tape main It tries to return to the original length in the order of the warp yarns 6c, 6d,. Therefore, the warp yarns 6a, 6b adjacent to the outside of the core strings 7a, 7b recover to their original length, and the recovery amount of the warp yarns 6c, 6d, ..., 6m, 6n on the tape main body side is the smallest. As a result, in the fastener chain 9 that has been manufactured, as shown in FIG. 3D, the element mounting edge 4 becomes linear, and the waviness of the tape main body 5 becomes noticeable.
[0040]
When a slider is passed through the fastener stringer 8 manufactured in this way and a slide fastener to which an upper and lower stopper is attached is sewn to the sewing product 9, the sewn portion is usually wavy due to sewing shrinkage. In the slide fastener according to the form, since the tape main body part 5 is in a wavy state, not only the sewing product 9 is well adapted to the sewing product regardless of the hardness of the sewing product 9 at the time of sewing, but it can be easily sewn. The product 10 after sewing can also be finished beautifully as shown in E of FIG. It is particularly suitable for flexible sewing products.
[0041]
FIG. 4 shows a modification of the fastener tape 1 obtained by weaving in the same manner as in the above embodiment. In this modification, the structure of the core cords 7a and 7b woven into the element attachment edge 4 is the same as that of the above embodiment, but two high stretches arranged adjacent to the outside of the coaxial cords 7a and 7b. The warp yarns 6a and 6b having the recovery rate R are arranged side by side in the front and back direction of the tape surface, and in the above-described embodiment, the two warp yarns 6o-1 having the fine fineness arranged on the outermost side of the element mounting edge 4 are provided. , 6o-2 is excluded.
[0042]
Further, in this modification, the warp yarns 6a and 6b having a high elongation recovery rate R of the element mounting edge 4 are subjected to polycondensation of n-propanediol and terephthalic acid having the same high elongation recovery rate R as in the above embodiment. A textured yarn made of a body is used, and the warp yarns 6c, 6d,..., 6m, 6n of the tape main body 5 have a polyester texture that has a smaller elongation recovery rate R than the warp yarns 6a, 6b as in the above embodiment. Doan is used. Incidentally, the elongation recovery rate R of the yarn obtained from the polycondensate of n-propanediol and terephthalic acid (manufactured by Asahi Kasei Co., Ltd.) is 88%, and the elongation is about 36-37%, which is comparable to polyester or nylon 66. And very large.
[0043]
FIG. 5 shows a further modification of the above embodiment. According to this modification, the element attachment edge 4 is a bag weave 4a, and one thick core string 7 is inserted into the bag weave, and the yarn disposed on the outermost side of the bag weave 4a. In addition, warp yarns 6o, 6a, 6b made of three nylon multifilaments having a larger elongation recovery rate R and larger than other warp yarns 6c, 6d,..., 6m, 6n are arranged. Polyester is used as the material of the other warps 6c, 6d,..., 6m, 6n as in the above embodiment.
[0044]
Even in these modifications, as in the above embodiment, the fastener stringer 8 after the element 3 is attached has a regular packer shape in which the element attachment edge 4 is slightly recessed, and the product form after sewing is beautiful. Can be finished. In these modified examples, two to three warps 6a, 6b (6o) having an elongation recovery rate R higher than that of the other warps 6c, 6d,. Because it is arranged on the outside, the behavior when trying to return to the original length after stretching is less affected by the surrounding tissue, the expected amount of recovery can be easily obtained, and a positive packer form is reliably obtained Can do.
[0045]
FIG. 6 shows a second embodiment of the present invention. The fastener tape 11 according to this embodiment is a warp knitted tape. Although the arrangement of the constituent yarns shown in the figure is roughly shown, the yarns are actually knitted more precisely. As in the first embodiment, the fastener tape 11 also includes an element attachment edge 14 to which a large number of elements 3 are attached at equal pitches, and a tape main body 15 that is sewn on a sewing product (not shown). ing. In this embodiment, chain knitting yarns 16a, 16b,..., 16m, 16n are arranged on all the wales, and 0-0 / is placed on the needle loops of the adjacent chain knitting yarns 16a, 16b,. 3-3 weft yarns 12a are sequentially inserted, and one core string 17 is arranged between the chain knitting yarns 16a and 16b of the element mounting edge 14, and the weft yarns 12a and 3-3 / 0-0 are arranged. The core string 17 is knitted and fixed to the element mounting edge 14 while alternately intersecting the weft yarns 12b on the front and back sides.
[0046]
Furthermore, between the chain knitting yarns 16a and the core cord 17 arranged on the outer side with the core string 17 between the two chain knitting yarns 16a and 16b arranged on the element attachment edge portion 14, A multifilament yarn 16p made of nylon is inserted between the weft yarns 12a and 12b. The nylon multifilament yarn 16p has an elongation recovery rate R, which is a feature of the present invention, larger than that of the other constituent knitting yarns 16a, 16b,. Yes. The nylon multifilament yarn 16p used in this embodiment has a total thickness of 470 dTex and an elongation recovery rate R of 94%.
[0047]
On the other hand, the core string 17 was bag-knitted using a polyester multifilament yarn made of three raw yarns having a thickness of 560 dTex and a core material 17 a and a single polyester multifilament yarn having a thickness of 267 dTex. It is covered with the skin part 17 and its elongation recovery rate R is 78.8%. The chain knitting yarns 16a, 16b,..., 16m, 16n and the weft yarns 12a, 12b are made of textured yarns made of 330 dTex polyester gusset filaments, and their elongation recovery rate R is 75.6%. It is.
[0048]
In this embodiment, as described above, the chain knitting yarns 16a, 16b,..., 16m, 16n and the weft yarns 12a, 12b are made thin and are made of a knitted structure. The tape 11 is extremely flexible and can be easily adapted to knitted fabrics and thin fabrics. Further, since the above-described configuration is adopted, the fastener stringer (not shown) after the element 3 is attached becomes a positive packer shape in which the element attachment edge portion 14 is slightly recessed, as in the first embodiment. Also, at the time of sewing, coupled with the flexibility of the tape main portion 15, it becomes well accustomed to the product to be sewn, and at the same time, the shrinkage that occurs during sewing can be sufficiently absorbed to produce a beautiful sewing product.
[0049]
FIG. 7 shows a modification of the second embodiment. In this modification, the nylon multifilament yarn 16p in the second embodiment is excluded, and the core string 17 of the two chain knitting yarns 16a and 16b disposed on the element attachment edge portion 14 is excluded. Nylon multifilament yarns having a high elongation recovery rate are also used for the chain knitting yarns 16a arranged on the outer side of the yarn. The physical properties at this time are also substantially the same as those in the second embodiment. In this modification, unlike the second embodiment, the yarn length of the chain knitting yarn 16a arranged on the outermost side of the element attachment edge portion 14 is more than twice, so that it is strongly pulled when the element 2 is attached. The amount of return to the original length after extending is relatively larger than that of the other chain knitting yarns 16b,..., 16m, 16n. Express more prominently.
[0050]
The above shows typical embodiments of the present invention and modifications thereof. From the above description, for example, a core cord constituting the element mounting edge and a configuration adjacent to the inside of the coaxial cord The elongation recovery rate R of the constituent yarn and core string extending in the warp and other warp directions, the material of the constituent yarn and core string, or the woven or knitted structure thereof is not limited to the above embodiment. It will be readily understood that various modifications can be made within the technical scope described in the claims of the present invention.
[Brief description of the drawings]
FIG. 1 is an enlarged partial perspective view schematically showing a typical embodiment of a woven structure of a fastener tape according to the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is an explanatory view schematically showing a change in form for each processing step of the fanner tape.
FIG. 4 is a cross-sectional view corresponding to FIG. 2 showing a modification of the embodiment.
FIG. 5 is a cross-sectional view corresponding to FIG. 2, showing another modification of the embodiment.
FIG. 6 is a partial plan view schematically showing a typical embodiment of a knitting structure of a fastener tape according to the present invention.
FIG. 7 is a partial plan view showing a modification of the embodiment.
[Explanation of symbols]
1,11 Fastener tape
2,12,12a, 12b Weft
3 Fastener elements
4,14 Element mounting edge
5,15 Tape main part
6o, 6a, 6b Warp yarn adjacent to the outside of the core string at the element mounting edge
6c-6n Warp extending inside the core string
6o-1,6o-2 Warp extending to the outermost part of the element mounting edge
7, 7a, 7b core string
8,18 Fastener stringer
9 Fastener chain
10 Sewing products
16a, 16b Chain knitting yarn adjacent to the outside of the core string
16c-16n Chain knitting yarn extending inside the core string
16p Trans-insertion thread adjacent to the outside of the core string at the element mounting edge

Claims (5)

Tape for a slide fastener (1) having a tape main part (5) obtained by woven knitting and an element mounting edge (4, 14) in which a core string (7a, 7b, 17) is woven or knitted. , 11) and
Each elongation recovery rate R expressed by the following formula (1) based on the yarn length measured according to JIS L1096 is the outside of the core string (7a, 7b, 17) of the element mounting edge (4, 14). Constituent yarns (6o, 6a, 6b, 16a, 16p) of element mounting edges (4, 14) arranged extending in the warp direction adjacent to the core string (7a, 7b, 17) , And all other constituent yarns extending in the warp direction (6c to 6n, 6o-1, 6o-2, 16a to 16n) are set in order of decreasing size. Tape for slide fastener.
R = {(L1-L2) / (L1-L0)} × 100 (1)
However, L0 indicates the original yarn length, L1 indicates the yarn length when pulled under a predetermined tension, and L2 indicates the yarn length after recovery from elongation under no tension. Large elongation recovery rate of the core thread in the element attachment edge portion (4, 14) (7a, 7b, 17) element attachment edge portion which is arranged extending in the warp direction and adjacent to the outside of the (4, 14) The slide fastener tape according to claim 1, wherein the elongation recovery rate R of the yarn (6o, 6a, 6b, 16a, 16p) having R is 85% or more. Constituent yarns (6c to 6n ) in which the thickness of the yarn (6o, 6a, 6b, 16a, 16p) having the largest elongation recovery rate R extends in the warp direction of the tape main body (5). , 6o-1, 6o-2, 16a to 16n), the tape for a slide fastener according to claim 1 or 2 , wherein the tape is thicker than a single yarn. The largest the yarns of the elongation recovery ratio R (6o, 6a, 6b, 16a, 16p) consists multifilament yarn made of nylon, any other composition yarns extending in the warp direction (6c ~6n , 6o-1, 6o-2, 16b-16n) are polyester multifilament yarns. The largest the yarns of the elongation recovery ratio R (6o, 6a, 6b, 16a, 16p) are multifilament yarns consisting of a polycondensate of n- propanediol and terephthalic acid, other extending in the warp direction The slide fastener tape according to claim 1 , wherein all of the constituent yarns (6c to 6n, 6o-1, 6o-2, 16b to 16n) are polyester multifilament yarns.

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