JP2024031856A - Stretchable warp knitted fabric and manufacturing method thereof - Google Patents

Abstract

To provide a stretchable warp knitted fabric having a hem texture capable of being knitted by a two-reed tricot knitting machine and capable of being separated, and manufacturing method thereof.SOLUTION: A stretchable warp knitted fabric is formed by knitting elastic yarns into a warp knitted ground weave knitted with non-elastic yarns and can be knitted by two reeds. The stretchable warp knitted fabric has a hem texture at which a draw thread part is disposed between two joint threads between adjacent two ground weaves to be products that are double wrap texture knitted with the non-elastic yarn and the elastic yarn as a closed texture knitted by two reeds. The joint thread is formed by Denbigh of silk lap formed of the elastic yarn. Fineness of the elastic yarn of wale adjacent to the joint thread in the ground weave and/or the draw thread part is the same as or larger than the fineness of the elastic yarn of the joint thread. The stretchable warp knitted fabric and a manufacturing method thereof allow obtaining two ground weaves to be products by extracting the draw thread part and causing the joint thread to break the stretchable warp knitted fabric.SELECTED DRAWING: Figure 1

Description

The present invention relates to a stretchable warp knitted fabric. More specifically, the present invention relates to a stretchable warp knitted fabric having a hem structure that can be knitted and separated using a two-reed tricot knitting machine, and a method for manufacturing the same.

Warp knitting machines are classified into tricot knitting machines, Raschel knitting machines, and Milanese knitting machines, but the first two are the main products. In general, tricot knitting machines have a draw-out angle of 90 to 115 degrees between the raw yarn supply yarn path in the knitting machine and the direction in which the greige is pulled out, the number of reeds is small (usually 2 to 4), and the number of gauges is high. (usually E32 to E36, maximum E50), has a high rotation speed (maximum 4400r/min), has a wide needle bed (130in to 260in), and is used for producing products made of thin fabrics, such as thin fabrics for women's Targeting products such as outerwear, men's outerwear, innerwear, lingerie, sportswear, uniforms, and swimwear, development focuses on improving productivity and creating thinner gauges. On the other hand, Raschel knitting machines have a pull-out angle of 130 to 170 degrees, have a larger number of reeds than tricot knitting machines (approximately 4 to 10), have a relatively slow rotation speed, and have a needle bed of usually 40 to 260 inches. The focus has been on the diversification of knitted fabrics and the development of specialized machines for special purposes, such as thick lace, curtains, and power nets. There is no major difference in the basic organization mechanism, except for the difference in the number of reeds.

Patent Document 1 below states that in order to prevent the seams from coming undone, conventional clothing is treated with some kind of cleaning method (referred to as hemming, etc.), and the methods vary depending on the part and material. (folding, sewing with separate cloth or elastic tape, and threading) are quite a burden when sewing clothing, and the hemline of underwear becomes a convex stripe that appears on the outer garment, making it difficult to wear. In order to eliminate the need to dispose of the edges of clothing, we have removed threads from power net knitted fabrics and cut the ends of lace to make the edges less likely to fray. Although there are methods of sewing fabric into clothing, each method can only provide a straight line or a substantially straight line, and can only be formed with vertically parallel lines. It is stated that there is a problem. In Patent Document 1, in order to solve this problem, the knitting structure is a 1×1 knitting structure in which an inelastic yarn and an elastic yarn are made together, and each knitting needle has at least one of the inelastic yarn and the elastic yarn. The first side includes a stretchable warp knitted fabric knitted with closed stitches, and further, a part or all of the edges of the stretchable warp knitted fabric are cut and cut, that is, without hemming. We provide stretchable clothing characterized by being made of.
In Patent Document 1, the stretchable warp knitted fabric provided can be knitted with a two-reed tricot knitting machine, but the knitted fabric has a cut edge on the knitting start side with respect to the cut edge on the knitting end side. Since the cut edge of the hemmingless is less likely to fray, it is assumed that the cut edge of the hemmingless is cut (cut) on the knitting start side in the knitting direction of the knitted fabric, so it can be separated (separated) without being cut. There is no description of a hem tissue that can be used to create a hem tissue, nor is there any description of stretchable clothing using this hem tissue.

Patent Document 2 below describes a thread-pulling section knitted on the same wale, a support structure located on both sides of the thread-pulling section in the weft direction and connected to the thread-pulling section; A step of sequentially knitting a gray fabric, the method comprising: hems provided at respective locations between the thread extraction portions; and connection portions that connect the support tissues located on both sides of the thread extraction portion to each other at intervals in the warp direction; , a method for manufacturing a warp knitted fabric is described, further comprising the steps of heat-setting the gray fabric, and removing the thread portion from the heat-set gray fabric. In this manufacturing method, in a warp knitted fabric made from gray fabric with holes formed using a conventional jacquard knitting structure, the holes expand in the weft direction due to the tensile load applied during heat setting, resulting in a rectangular shape. Therefore, when holes are formed using a jacquard knitting structure, the design of the warp knitted fabric is restricted due to deformation of the holes during heat setting, and the holes may spread in the weft direction. As a result, the density of the warp knitted fabric is higher in the parts located near the holes and in the parts sandwiched between the holes (the higher density parts of the knitted fabric are compared to other parts). This was done in view of the problem that as a result, the thickness and stretchability of the warp knitted fabric change undesirably around the holes (as the thickness increases, the stretchability decreases). In other words, Patent Document 2 provides a warp-knitted fabric that reduces undesirable changes in thickness and elasticity around the holes by suppressing the deformation of the holes during heat setting, and has a high design quality. It is intended to.
The warp knitted fabric described in Patent Document 2 is knitted using a Jacquard Russell knitting machine, and the supporting structure includes inelastic yarn threaded through a first reed and elastic yarn threaded through a second reed. The thread removal part and the hem part are made of chain knitting of inelastic yarn threaded through the third reed, and the connecting part is made up of inelastic thread threaded through the fourth reed.
Thus, Patent Document 2 does not describe a warp knitted fabric including a hem structure knitted with a tricot machine.

Patent Document 3 below describes a stretchable warp knitted fabric in which elastic yarns are inserted or knitted into a warp knitted ground structure knitted with inelastic yarns, which has a fabric part that will become a product and a waste knitted fabric part. are provided adjacent to each other in the weft direction, and the boundary between the fabric part and the waste knitted fabric part has a draw thread for separating the fabric part and the waste knitted fabric part, and a hem part to prevent fraying. , a stretchable warp knitted fabric is described in which the waste knitted fabric portion has a net-like portion composed of a plurality of holes formed adjacent to each other in the warp direction and the weft direction. The object of the invention described in Patent Document 3 is to provide a stretchable warp knitted fabric that can obtain a fabric whose hem portion is greatly curved in a waveform, and clothing using the same. Patent Document 3 discloses that women's underwear such as girdles and bodysuits use stretchable warp knitted fabrics that have elasticity throughout the fabric by inserting or knitting elastic threads into a ground knitted structure made of inelastic threads. It is known that by pulling out the threads woven into the fabric, it is separated into multiple elastic warp knitted fabrics, and a hem is formed at the edge of each separated knitted fabric to prevent the threads from fraying. However, the hem is formed straight in the meridian direction, whereas women's bodies have rounded chest and buttocks, and if the hem and power-up area are straight, the hem and power-up area will be straight. It is stated that the invention has been made in order to solve the problem that it is inconvenient that the up part cannot be arranged in accordance with the curve of the body.
In Patent Document 3, a warp knitted fabric is knitted with three reeds using a Raschel knitting machine manufactured by Karl Mayer as a knitting machine, and a boundary part between the fabric part and the waste knitted fabric part is made of inelastic yarn. The threads are woven in chain stitch.

Patent Document 4 below discloses a stretchable warp knitted fabric in which the body fabric portion is knitted from stretchable yarns and non-stretchable yarns, which can be divided by thread removal, and in which the threads to be removed and the After the division, each of the threads forming the hem portion of each body fabric is made of non-stretchable yarn, and the thread-pulling part and the hem part are knitted by chain stitch, and the thread-pulling part and the hem part after the division are made of non-stretchable yarn. A stretchable connecting yarn with a yarn fineness of 22 to 1240 dtex is used as the connecting yarn, and the knitting structure of the stretchable connecting yarn is different from that of the stretchable yarn and the non-stretchable yarn constituting the body fabric portion. A divisible stretchable warp knitted fabric is described.
The purpose of the invention described in Patent Document 4 is to prevent the hems and edges of clothing from fraying without having to clean them up, and warp knitted fabrics that are divided by thread removal have come to be used. In particular, proposals have been made for stretchable knitted fabrics that can be divided by thread removal and are suitable for lingerie, foundations, etc., but the number of beam yarn feeding devices in warp knitting machines, that is, the number of shafts that drive the beams, is generally limited. It is difficult to produce a divisible stretchable warp knitted fabric when there are as few as 2 to 5 threads and the combination of yarn types is complex in order to improve design and functionality. To provide a stretchable warp knitted fabric which can be divided even when it is a complicated combination of yarn types in order to further improve the quality of the yarn, and which prevents knitting yarns from fraying at the divided edges.
The stretchable warp knitted fabric described in Patent Document 4 has a chain stitch in the punched yarn, is knitted with five reeds, and has a punched yarn, an elastic connecting yarn, a non-stretchable yarn constituting the hem portion, and a stretchable yarn constituting the hem portion. Each thread is wound around a separate thread body. After taking the thread in the axial direction of the thread body and unwinding it, each thread is introduced into a tension adjustment device to adjust the knitting yarn tension. After controlled knitting to obtain a warp knitted fabric, the drawn yarns are removed from the warp knitted fabric to obtain a stretchable knitted fabric divided into a plurality of parts. By adopting this method, it is possible to improve functionality and design by using a wide variety of non-stretchable yarns and stretchable yarns in the body fabric, and to achieve a high-quality appearance with no undulations or dullness in the hem area. It is said that it is possible to produce warp knitted fabrics with excellent elasticity. As described above, Patent Document 4 discloses a stretchable warp knitted fabric with a complex combination of yarn types and a high design quality, including a hem portion in which the drawn yarn is chain stitched, using a Raschel knitting machine.

As mentioned above, stretchable warp knitted fabrics containing a hem structure knitted using a Raschel knitting machine with three or more reeds and their manufacturing method are known, but hem structures that can be separated using a tricot knitting machine with two reeds are known. No stretchable warp knitted fabric is known. In addition, stretchable warp knitted fabrics containing hem structures knitted using conventional Raschel knitting machines with three or more reeds require thread removal when dividing them, which requires special equipment and preparation. It was requested.

Japanese Patent Application Publication No. 2003-147618 Japanese Patent Application Publication No. 2018-16919 Unexamined Japanese Patent Publication No. 2014-5582 Japanese Patent Application Publication No. 2013-7150

In view of the level of the prior art described above, the problem to be solved by the present invention is to provide a stretchable warp knitted fabric having a hem structure that can be knitted and separated using a two-reed tricot knitting machine, and a method for manufacturing the same. That's true.

As a result of intensive studies and repeated experiments in order to solve the above-mentioned problems, the inventor of the present application unexpectedly found that the above-mentioned problems could be solved by the following configuration, and the present invention was completed.
That is, the present invention is as follows.

[1] In a stretchable warp-knitted fabric that can be knitted with two reeds, in which elastic yarn is knitted on a warp-knitted ground structure knitted with inelastic yarn,
The stretchable warp knitted fabric has two connections between two adjacent product fabrics, which are double wrap fabrics formed of inelastic yarns and elastic yarns, as a closed fabric of two-ply reed knitting. It has a hem structure in which a thread extraction part is arranged between the threads, where the connecting thread is knitted with a closed Denby (1×1 tricot, single tricot) structure made of elastic yarn, and
The fineness of the elastic yarn of the wale adjacent to the tether in the ground weave and/or the drawn thread part is the same as or larger than the fineness of the elastic yarn of the tether, and
The stretchable warp knitted fabric is capable of obtaining a ground structure for two products by pulling out the drawn yarn portion and breaking the connecting yarn.
[2] The elastic warp knitting according to [1] above, wherein the ground weave of the product is a double wrap structure in which the open Denby weave of the elastic yarn overlaps the closed Denby weave of the inelastic yarn. Earth.
[3] The following steps:
Passing an inelastic thread through the front reed; however, in place of the inelastic thread, a fused/fused elastic thread is threaded through the hole of the thread guide needle corresponding to the position of the connecting thread;
An elastic thread is passed through the rear reed, provided that the thread guide hole corresponding to the position adjacent to the connecting thread has an elastic thread having a fineness that is the same as or larger than that of the elastic thread of the connecting thread. Thread the thread, but do not pass the thread through the hole of the thread guide needle corresponding to the position of the connecting thread;
knitting as a double wrap structure on a tricot knitting machine; and heat setting the resulting gray fabric;
The method for producing a stretchable warp knitted fabric according to [2] above, comprising:
[4] The elastic warp knitting according to [1] above, wherein the ground weave that becomes the product is a double wrap weave in which the open Denby weave of the inelastic yarn overlaps the closed Denby weave of the elastic yarn. Earth.
[5] The following steps:
Passing the inelastic thread through the front reed, but not passing the thread through the hole of the thread guide needle corresponding to the position of the connecting thread;
Pass the elastic thread through the rear reed; however, pass the fused and fused elastic thread through the hole of the yarn guiding needle corresponding to the position of the connecting thread, and also pass the elastic thread through the hole corresponding to the position adjacent to the connecting thread. Threading through the hole of the thread-guiding needle is an elastic thread having a fineness that is the same as or greater than the fineness of the elastic thread of the connecting thread;
knitting as a double wrap structure on a tricot knitting machine; and heat setting the resulting gray fabric;
The method for producing a stretchable warp knitted fabric according to [4] above, comprising:
[6] The ground weave of the product is a half tricot (charmeuse, rosa knit tricot) weave in which the open cord weave of the inelastic yarn and the closed Denby weave of the elastic yarn overlap. Stretchable warp knitted fabric described in ].
[7] The following steps:
Passing an inelastic thread through the front reed; however, do not thread the inelastic thread through the holes of two or three consecutive thread guide needles adjacent to the thread guide needle corresponding to the position of the connecting thread;
A full set of elastic threads is passed through the rear reed, however, a fused and fused elastic thread is passed through the hole of the thread guide needle corresponding to the position of the above-mentioned tethering thread, and the thread adjacent to the above-mentioned tethering thread is Threading an elastic thread having a fineness equal to or larger than that of the elastic thread of the connecting thread through the hole of the thread guiding needle corresponding to the position;
Knitting the half tricot weave as a double lap weave on a tricot knitting machine; and heat setting the resulting gray weave;
The method for producing a stretchable warp knitted fabric according to [6] above.

According to the present invention, it is possible to provide a stretchable warp knitted fabric having a hem structure that can be knitted and separated using a two-reed tricot knitting machine, and a method for manufacturing the same. As mentioned above, stretchable warp knitted fabrics containing a hem structure knitted using conventional Raschel knitting machines with three or more reeds require thread removal when dividing them, and therefore special equipment is required. However, according to the present invention, a two-reed tricot knitting machine is used to pull out the threads (waste fabric) with high density and high productivity, and create edges without fraying. It is possible to provide a stretchable warp knitted fabric that has a hem structure that is durable, has a good balance of longitudinal and lateral elongation, and can be separated into two product knitted fabrics (ground structures) with good appearance.

The ground texture knitted in Example 1 is a stretchable warp knitted fabric of Denby texture (inelastic yarn closed stitches, elastic yarn open stitches). Reference numeral (2) is a connecting thread, reference numbers (1) and (3) are elastic threads located adjacent to the linking thread (2) within the thread pulling section and within the fabric, respectively; 4) is an elastic yarn other than (3) in the ground structure. The same applies to Figures 2 and 3 below. The ground structure knitted in Example 2 is a stretchable warp knitted fabric of Denby structure (inelastic yarn open stitches, elastic yarn closed stitches). The ground structure knitted in Example 3 is a stretchable warp knitted fabric with a half tricot structure (inelastic threads open, elastic threads closed). 1 is a photograph in place of a drawing illustrating a state in which the thread part is pulled out and a location where the subsequent ground structure is used as a product in the stretchable warp knitted fabric of Example 1.

Embodiments of the present invention will be described in detail below.
A first embodiment of the present invention is a stretchable warp-knitted fabric that can be knitted with two reeds, in which elastic yarns are knitted on a warp-knitted ground structure knitted with inelastic yarns.
The stretchable warp knitted fabric has two connections between two adjacent product fabrics, which are double wrap fabrics formed of inelastic yarns and elastic yarns, as a closed fabric of two-ply reed knitting. It has a hem structure in which a thread extraction part is arranged between the threads, where the connecting thread is knitted with a closed Denby (1×1 tricot, single tricot) structure made of elastic yarn, and
The fineness of the elastic yarn of the wale adjacent to the tether in the ground weave and/or the drawn thread part is the same as or larger than the fineness of the elastic yarn of the tether, and
The stretchable warp knitted fabric is the stretchable warp knitted fabric from which a base structure for two products can be obtained by pulling out the drawn yarn portion and breaking the connecting yarn.
The ground structure that becomes the product is a double wrap structure in which the open Denby structure of the elastic yarn overlaps the closed Denby structure of the inelastic yarn (see Example 1); , a double wrap structure in which the open Denby structure of the inelastic yarn overlaps the closed Denby structure of the elastic yarn (see Example 2); It includes at least an embodiment (see Example 3) that is a half tricot (charmeuse, rag tricot) structure in which the open cord structure and the closed Denby structure of the elastic yarn overlap.

(Inelastic thread)
The inelastic yarn is not particularly limited, and includes synthetic fibers such as polyester, nylon, and acrylic, recycled fibers such as cupro and rayon, and natural fibers such as cotton, silk, hemp, and wool. As the inelastic yarn, any fiber suitable for the required function of the garment may be used. For example, if synthetic fibers such as polyester or nylon are used, the garment will have high dimensional stability, and if high hygroscopicity is to be imparted, fibers with a high official moisture content such as cotton, cupro, or wool may be used. Furthermore, two or more types of inelastic yarns may be used by blending, blending, intertwisting, or the like. However, if it is desired to obtain clothing that does not require a high degree of edge trimming, it is preferable to use synthetic fibers such as nylon and polyester, which have high dry heat setting properties. Among these, nylon, which has high water absorption properties, is preferably used as a knitted fabric for innerwear. Further, the form of the inelastic yarn is not particularly limited and may be filament yarn, spun yarn, irregular cross-section yarn, spun yarn, twisted yarn, false twisted yarn, or the like. The thickness of the inelastic yarn is not particularly limited either, and the optimum fineness can be selected depending on the gauge of the warp knitting machine to be manufactured, and yarns with a thickness of preferably 15 to 170 dtex, more preferably 20 to 90 dtex are used. be able to.

(elastic thread)
The elastic yarn may be of any known type, and is preferably a fused elastic yarn or a bonded elastic yarn (together referred to as a fused elastic yarn) that has the ability to be fused or bonded by normal heat setting. In addition, the elastic thread is not limited by the polymer raw material system or spinning method, and may be any of polyurethane-based, polyether ester-based, dry spinning, wet spinning, melt spinning, etc., without being limited by the polymer raw material system or spinning method. However, from the viewpoint of obtaining a high degree of stable stretchability, the elastic yarn is preferably a polyurethane elastic yarn made of polyether and produced by a dry spinning method. The thickness of the elastic thread is preferably 15 to 1000 dtex, more preferably 30 to 500 dtex. It is preferable that the elastic yarn has a breaking elongation of 400 to 1000%, has excellent elasticity, and does not lose its elasticity at a general processing temperature of around 185° C. in the presetting step during dyeing. In addition, the stretchable warp knitted fabric of this embodiment can include two or more types of elastic yarns, and these may be from the same raw material system and spinning method or from different In the case of raw materials and spinning methods, the fineness of the elastic yarns of the wales adjacent to the connecting yarns ((3) and (1) in Figures 1 to 3, respectively) in the ground structure and in the thread extraction section. must be equal to or greater than (higher) the fineness of the elastic yarn (2) of the connecting yarn, which allows the fineness of the two fabrics between the two adjacent products to be Two separated fabric products (ground fabric) can be obtained by pulling out the drawn thread part in the hem structure in which the drawn thread part is arranged between the connecting threads and tearing the connecting thread (2) to pieces. . At this time, as illustrated in FIG. 4, the appearance of the hem of the separated product (base structure) obtained is good. For example, as illustrated in Figures 1 to 3, two 22 dtex elastic yarns (3) in the wale adjacent to the connecting yarn (2) in the ground structure are used, and the connecting yarn (2) is a fused elastic yarn. Just use one piece of 22 dtex. Thereby, while using one type of elastic yarn, the fineness of the elastic yarn supplied for each wale can be adjusted by changing the number of elastic yarns.
Note that the elastic yarn may not be knitted in the wale that is not adjacent to the connecting yarn in the thread removal section (see FIGS. 1 and 2). This is because the removed thread portion becomes waste fabric, so there is no need to knit elastic thread in this portion. In addition, the reason why elastic yarn is knitted in the wale in the drawn yarn part adjacent to the connecting yarn is to suppress the occurrence of wrinkles during presetting and heat setting, and to obtain a stretchable warp knitted fabric with a good appearance. .
In addition, as illustrated in FIGS. 1 to 3, the elastic threads (4) in the ground structure other than the elastic threads (3) adjacent to the connecting threads (2) do not have to be two 20 denier threads. . In addition, the structure of the elastic thread (3) at the position adjacent to the connecting thread (2) may be continuous in 2 to 100 wells, including the location adjacent to the connecting thread (2).

(edited organization)
In the stretchable warp knitting of the first embodiment illustrated in FIG. 1, the fabric part (base texture) that becomes the product has a two-dimensional structure in which the open Denby structure of the elastic yarn overlaps the closed Denby structure of the inelastic yarn. All the stitches as a closed stitch in the sheet reed knitting are a double wrap stitch formed of inelastic yarns and elastic yarns, and the connecting yarn is a closed Denby stitch.
In the stretchable warp knitting of the second embodiment illustrated in FIG. 2, the fabric portion (base texture) that becomes the product has a two-dimensional structure in which the open Denby texture of the inelastic yarn overlaps the closed Denby texture of the elastic yarn. All the stitches as a closed stitch in the sheet reed knitting are a double wrap stitch formed of inelastic yarns and elastic yarns, and the connecting yarn is a closed Denby stitch.
The Denby (1×1 tricot) knitting structure has beautiful, thin stitches with uniform stitches, short yarn legs, and each knitting needle is knitted with at least one of the inelastic yarn and elastic yarn closed. This stabilizes the stitches, provides an excellent appearance, and prevents fraying.
In this structure, as a result of the two reeds passing the warp symmetrically from the left and right, each stitch is formed vertically, and the warp of the front reed gives a plating-like effect to its surface. As a stretchable knitted fabric, it has a good balance of expansion and contraction in the weft and weft directions.

In the stretchable warp knitted fabric of the third embodiment illustrated in FIG. 3, the fabric part (base texture) that becomes the product is a half-half fabric in which the open cord structure of the inelastic yarn and the closed denby structure of the elastic yarn overlap.・It is a tricot (charmeuse, rasa knit tricot) weave, and the connecting thread is a closed Denby weave.
The knitting structure of half tricot is such that the warp threads of the front reed cover both the front and back sides of the knitted fabric, and at the same time, the legs of the long warp threads of the front reed float toward the back surface, and when turned at a right angle, The appearance gives a kind of three-dimensional effect similar to ridged knitting. In addition, this knitted fabric is relatively thinner than double bar cord knitting (double bar cord), and its structure is strong.

In the elastic warp knitted fabric of the first embodiment of the present invention including the first to third aspects, the connecting yarn is knitted with a closed Denby (1×1 tricot, single tricot) structure made of elastic yarn. It is characterized by If the connecting yarn has a Denby weave with closed stitches and is knitted as a melt-fused elastic yarn, the elastic yarn will coalesce in closed loops (knits) during pre-setting and heat-setting, and then the thread section will be pulled out. Then, when the connecting yarn is torn to pieces to obtain two fabric products (base texture), the legs of the torn elastic yarn become shorter, resulting in a better appearance of the hem (edge).

The stretchable warp knitted fabrics of the first to third embodiments (knitted structures illustrated in FIGS. 1 to 3, respectively) can be manufactured by the following methods 1 to 3, respectively.
(First method)
The following steps:
Passing an inelastic thread through the front reed; however, in place of the inelastic thread, a fused/fused elastic thread is threaded through the hole of the thread guide needle corresponding to the position of the connecting thread;
An elastic thread is passed through the rear reed, provided that the thread guide hole corresponding to the position adjacent to the connecting thread has an elastic thread having a fineness that is the same as or larger than that of the elastic thread of the connecting thread. Thread the thread, but do not pass the thread through the hole of the thread guide needle corresponding to the position of the connecting thread;
knitting as a double wrap structure on a tricot knitting machine; and heat setting the resulting gray fabric;
The method for producing the stretchable warp knitted fabric, comprising:
(Second method)
The following steps:
Passing the inelastic thread through the front reed, but not passing the thread through the hole of the thread guide needle corresponding to the position of the connecting thread;
Pass the elastic thread through the rear reed; however, pass the fused and fused elastic thread through the hole of the yarn guiding needle corresponding to the position of the connecting thread, and also pass the elastic thread through the hole corresponding to the position adjacent to the connecting thread. Threading through the hole of the thread-guiding needle is an elastic thread having a fineness that is the same as or larger than that of the elastic thread of the connecting thread;
knitting as a double wrap structure on a tricot knitting machine; and heat setting the resulting gray fabric;
The method for producing the stretchable warp knitted fabric, comprising:
(Third method)
The following steps:
Passing an inelastic thread through the front reed; however, do not thread the inelastic thread through the holes of two or three consecutive thread guide needles adjacent to the thread guide needle corresponding to the position of the connecting thread;
A full set of elastic threads is passed through the rear reed, however, a fused and fused elastic thread is passed through the hole of the thread guide needle corresponding to the position of the above-mentioned connecting thread, and Threading an elastic thread having a fineness equal to or larger than that of the elastic thread of the connecting thread through the hole of the thread guiding needle corresponding to the position;
Knitting the half tricot weave as a double lap weave on a tricot knitting machine; and heat setting the resulting gray weave;
The method for producing the stretchable warp knitted fabric, comprising:

The stretchable warp knitted fabric of the first embodiment of the present invention is characterized in that it can be knitted using a two-reed tricot knitting machine. Of course, it can be knitted using a Raschel knitting machine, but as mentioned above, conventionally, stretchable warp knitted fabrics containing a hem structure are knitted using a Raschel knitting machine with three or more reeds, and when dividing this, Since special equipment and preparation were required due to the need for drawing yarn, this embodiment has technical significance in that it can be manufactured with high productivity using a two-reed tricot knitting machine.

The gauge of the tricot knitted fabric is not particularly limited, but from the viewpoint of further suppressing fraying and easily obtaining good stretchability, it is preferably 14 gauge or more and 48 gauge or less, and more preferably 24 gauge or more and 36 gauge or less. Note that the gauge is defined by the number of knitting needles arranged in 1 inch (2.54 cm) on the knitting machine.

In addition, while typical knitted fabrics have a finished width of around 160cm to 200cm, stretchable warp knitted fabrics are knitted as densely as possible to maintain the beauty of the stitches in stretchable clothing. Desirable to improve its stability. Although it depends on the fineness of the knitting yarn used, the knitted fabric is preferably knitted to a density of more than 65 wales per inch, preferably around 75 wales, and the weft elongation ratio of the knitted fabric is increased.

As described above, manufacturing the stretchable warp knitted fabric of this embodiment includes a step of heat setting the obtained gray fabric after knitting with a tricot knitting machine.
In order to obtain stability, fray prevention effects, etc., it is necessary to perform presetting treatment and/or heat setting treatment. The processing temperature depends on the shape of the device, the presetting processing time, the heat setting processing time, the type of material, the thickness of the knitted fabric, etc., but is at least a temperature not lower than 180°C, preferably a temperature not lower than 185°C, In order to more reliably obtain the above effect, if the process is carried out in the range of 190°C to 195°C, a part of the knitted fabric will soften, fuse or coalesce slightly, stabilize the form of the knitted fabric, and prevent fraying. It becomes difficult. The processing time is preferably about 15 to 40 m/min, preferably about 24 to 36 m/min, using, for example, an apparatus having a six-chamber configuration.

As illustrated in FIG. 4, the stretchable warp knitted fabric of this embodiment can be used in a wide range of clothing, such as foundations, innerwear, sportswear, and outerwear, and is especially suitable for the skin, such as innerwear and sportswear. For close-fitting clothing, it can be suitably used without fraying even if the garment is separated and formed without hemming the openings of the garment, such as the waist, legs, arms, neck, etc.

The present invention will be specifically explained below, but the present invention is not limited thereto.
The stretchable warp knitted fabric was fabricated using a 36 gauge/inch (2.54 cm) tricot knitting machine manufactured by Karl Mayer (HSK2-3), and the following reeds and yarn types, arrangement and knitting conditions, and finishing processing conditions were used. I configured and implemented it as follows.

[Example 1]
The knitting structure is shown in Figure 1. In Example 1, the structure (3) in FIG. 1 (using two PUs) was made continuous for 36 wells.
A warp knitted fabric was knitted using the following threads.
The front reed is made of nylon 33dtex/34f (manufactured by Changle Koshin Synthetic Technology Co., Ltd.)
were arranged and organized.
A full set of Roica (registered trademark, manufactured by Asahi Kasei Corporation, polyurethane elastic thread, type SF (#F11) 22 dtex) was arranged on the rear reed, and a structure was created in which one polyurethane thread was used and two polyurethane threads were used.
The white fabric (gray fabric) is subjected to the above dyeing process (scouring (40 seconds while increasing the temperature to 50°C to 90°C) → presetting (60 seconds at 195°C) → dyeing (35 minutes at 90°C to 100°C) → final Finishing was done by setting (done twice at 160°C for 35 seconds), and a softener was added during processing to obtain a warp knitted fabric with excellent stretchability.

[Example 2]
The knitting structure is shown in Figure 2.
A warp knitted fabric was knitted using the following threads.
Nylon 22dtex/24f (manufactured by Changle Koshin Synthetic Technology Co., Ltd.) was placed on the front reed to form a structure.
A full set of Roica (registered trademark, manufactured by Asahi Kasei Corporation, polyurethane elastic thread, type SF (#F11) 22 dtex) was placed on the rear reed to form a structure.
The white fabric (gray fabric) is subjected to the above dyeing process (scouring (40 seconds while increasing the temperature to 50°C to 90°C) → presetting (60 seconds at 195°C) → dyeing (35 minutes at 90°C to 100°C) → final Finishing was done by setting (done twice at 160°C for 35 seconds), and a softener was added during processing to obtain a warp knitted fabric with excellent stretchability.

[Example 3]
The knitting structure is shown in Figure 3.
A warp knitted fabric was knitted using the following threads.
Nylon 33dtex/34f (manufactured by Changle Koshin Synthetic Technology Co., Ltd.) was placed on the front reed to form a structure.
A full set of Roica (registered trademark, manufactured by Asahi Kasei Corporation, polyurethane elastic thread, type SF (#F11) 22 dtex) was placed on the rear reed to form a structure.
The white fabric (gray fabric) is subjected to the above dyeing process (scouring (40 seconds while increasing the temperature to 50°C to 90°C) → presetting (60 seconds at 195°C) → dyeing (35 minutes at 90°C to 100°C) → final Finishing was done by setting (done twice at 160°C for 35 seconds), and a softener was added during processing to obtain a warp knitted fabric with excellent stretchability.

[Evaluation of the appearance of the edge (hem) of the ground weave after pulling out the thread]
The drawn-out portion of the warp knitted fabric obtained in Example 1 was pulled out by hand and separated into 2 product fabrics (base texture). As illustrated in FIG. 4, the edges of the separated ground tissue were clean and free of fraying and wrinkles.

According to the present invention, it is possible to provide a stretchable warp knitted fabric having a hem structure that can be knitted and separated using a two-reed tricot knitting machine, and a method for manufacturing the same. As mentioned above, stretchable warp knitted fabrics containing a hem structure knitted using conventional Raschel knitting machines with three or more reeds require thread removal when dividing them, and therefore special equipment is required. However, according to the present invention, a two-reed tricot knitting machine is used to pull out the threads (waste fabric) with high density and high productivity, and create edges without fraying. It is possible to provide a stretchable warp knitted fabric that has a hem structure that is durable, has a good balance of longitudinal and lateral elongation, and can be separated into two product knitted fabrics (base structures) with good appearance. Therefore, the stretchable warp knitted fabric having a hem structure according to the present invention can be suitably used in the production of thin women's outerwear, men's outerwear, innerwear, lingerie, sportswear, uniforms, swimwear, etc. It is.

Claims (7)

In a stretchable warp-knitted fabric that can be knitted with two reeds, in which elastic yarn is knitted on a warp-knitted ground structure knitted with inelastic yarn,
The stretchable warp knitted fabric has two connections between two adjacent product fabrics, which are double wrap structures formed of inelastic yarns and elastic yarns, as a closed structure of two-ply reed knitting. It has a hem structure in which a thread extraction part is arranged between the threads, where the connecting thread is knitted with a closed Denby structure made of elastic thread, and
The fineness of the elastic yarn of the wale adjacent to the connecting yarn in the ground weave and/or in the drawn thread part is the same as or larger than the fineness of the elastic yarn of the connecting yarn, and
The stretchable warp knitted fabric is capable of obtaining a ground structure for two products by pulling out the drawn yarn portion and breaking the connecting yarn. 2. The stretchable warp knitted fabric according to claim 1, wherein the ground weave that becomes the product is a double-wrap weave in which a closed-eye Denby weave of the inelastic yarn overlaps an open-eye Denby weave of the elastic yarn. The following steps:
Passing a non-elastic thread through the front reed; however, threading an elastic thread instead of the non-elastic thread into the hole of the thread guide needle corresponding to the position of the connecting thread;
An elastic thread is passed through the rear reed, provided that the thread guide hole corresponding to the position adjacent to the connecting thread has an elastic thread having a fineness that is the same as or larger than that of the elastic thread of the connecting thread. Thread the thread, but do not pass the thread through the hole of the thread guide needle corresponding to the position of the connecting thread;
knitting as a double wrap structure on a tricot knitting machine; and heat setting the resulting gray fabric;
The method for producing a stretchable warp knitted fabric according to claim 2, comprising: 2. The stretchable warp knitted fabric according to claim 1, wherein the ground weave that becomes the product is a double wrap weave in which the open Denby weave of the inelastic yarn overlaps the closed Denby weave of the elastic yarn. The following steps:
Passing the inelastic thread through the front reed, but not passing the thread through the hole of the thread guide needle corresponding to the position of the connecting thread;
An elastic thread is passed through the rear reed, provided that an elastic thread having a fineness equal to or larger than that of the elastic thread of the connecting thread is inserted into the thread guiding hole corresponding to the position adjacent to the connecting thread. thread;
knitting as a double wrap structure on a tricot knitting machine; and heat setting the resulting gray fabric;
The method for producing a stretchable warp knitted fabric according to claim 4, comprising: 2. The stretchable warp knitted fabric according to claim 1, wherein the ground weave that becomes the product is a half tricot weave in which an open cord weave of the inelastic yarn and a closed Denby weave of the elastic yarn overlap. The following steps:
Passing an inelastic thread through the front reed; however, do not thread the inelastic thread through the holes of two or three consecutive thread guide needles adjacent to the thread guide needle corresponding to the position of the connecting thread;
A full set of elastic threads is passed through the rear reed, however, the fineness of the thread guide needle corresponding to the position adjacent to the tethering thread is the same as or greater than the fineness of the elastic thread of the tethering thread. Threading elastic thread with a large fineness;
Knitting the half tricot weave as a double lap weave on a tricot knitting machine; and heat setting the resulting gray weave;
The method for producing a stretchable warp knitted fabric according to claim 6, comprising:

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