JPS636141A - Extensible warp knitted fabric and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a stretchable warp knitted fabric used for foundations, sports fields, etc. <Prior Art> Conventionally, relatively thick elastic fibers have been used. The inserted warp knitted fabric is widely used as an innerwear material under names such as power net and satin net. Thick elastic fibers are used to increase the elasticity of the fabric, but if knit loops are formed with these yarns, the fabric becomes too thick and this poses a practical problem, so thick elastic fibers are generally inserted into the fabric. However, such a knitted fabric has a serious problem in that the inserted elastic yarn easily slips out of the knitted structure. Many studies have been made to prevent this from occurring, including attempts to change the runner length of inelastic fibers and the silk fabric density, but these efforts have not had any effect. Also known are knitted fabrics in which two types of elastic yarns are fused together. However, in order to fuse the elastic fibers, it is necessary to treat the knitted fabric at high temperatures, and in this case a new problem arises in that the elastic force of the elastic fibers is significantly reduced, and a fundamental solution has not yet been reached. The current situation was that it was not.

<Problems to be Solved by the Invention> The present invention aims to solve such conventional problems and provide a stretch warp knitted fabric in which the elastic yarns are less likely to fall out and the power of the elastic yarns is not reduced due to high temperature treatment. purpose.

Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides a warp knitted fabric formed from elastic fibers and inelastic collapsed fibers, in which at least 21 aM of elastic fibers are used. At least one kind of elastic fiber is partially or completely looped, and the sinker loop formed by the grafting yarn and the bullet inserted with the remainder 8. This is a stretch warp knitted fabric characterized by the fact that the fibers are intertwined with each other. ''!!Next, the stretchable warp knitted fabric of the present invention is a warp knitted fabric formed from elastic fibers and inelastic fibers, in which elastic fibers are supplied from at least two reeds, and at least one of these reeds is supplied with elastic fibers. This manufacturing method is characterized by looping the elastic fibers supplied from the reed partially or over the entire course, and entangling the sinker loop formed by the welding yarn with the elastic fibers supplied from another reed and inserted.

Elastic fibers include, for example, rubber threads and polyurethane elastic fibers. The inelastic fibers may be synthetic fibers, recycled fibers, natural fibers, or a combination of these fibers. However, when the application is in the field of innerwear, polyamide synthetic fibers are preferable from the viewpoint of strength, and when imparting a water absorption function, cotton threads or the like may be mixedly knitted in addition to the polyamide synthetic fibers. In addition, among the two types of elastic fibers, it is preferable to use relatively thin denier threads for looping in order to reduce the thickness of the fabric and reduce costs, but the elastic fibers used for the other insertion are It is responsible for stretchability and uses relatively thick denier yarn. The ratio of the denier between the two is preferably insertion yarn denier/looping yarn denier≧6. That is, when the ratio of the denier is 5, the stretchability is poor if the fabric is thick or thin.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on one embodiment with reference to the drawings.

FIG. 1 shows a loop structure diagram of a stretch warp knitted fabric showing an embodiment of the present invention. 1-1 in the figure. ．． 1-4 are needle loose and sinker loops made of inelastic fibers, 2-
1. ．． 2-2. shows needle loops and sinker loops made of elastic fibers.

In the present invention, looping on a partial or entire course.

The elastic fibers shown in Figure 1 are 2-1. ．． Refers to the thread shown in 2-1. Looping in part or all of the courses means that the elastic fibers 2 are looped in the (1) course to form a knit loop, and are inserted without looping in the (2) and (3) courses. (4) Re-looping the coast to form a knit loop. In this way, Figure 1 shows an example of partial looping with one course in three courses, but it is not necessarily partial.
You may croup along all courses.

Next, the yarn indicated by 3 in FIG. 1 represents the remaining inserted elastic fibers, and in the present invention, it is necessary that this yarn is intertwined with the sinker loop of the elastic fiber 2. Furthermore, although FIG. 1 shows a case where the wrapping directions of the elastic fibers 2 and 3 are the same, it is possible that the wrapping directions are different. But 9
Preferably, the elastic fibers 2 and 3 should be in the same direction so that the elastic fibers 2 and 3 are in contact for a long time and the second elastic fiber 3 is prevented from being pulled out.

Next, examples of knitting structures for manufacturing stretch warp knitted fabrics of the present invention are shown in FIGS. 2 and 3. In the figure, L□ indicates the rear reed, and all the inelastic fibers are supplied from the wetted part. L2 is a reed with elastic fiber 2,
L3 is elastic with pre-liquid! It is used to supply fiber 3.

All reeds have threads arranged in a full set.

<Example> Using 24 filaments of nylon 66.70 denier as the inelastic fiber 1, 20 denier polyurethane elastic fiber as the elastic fiber 2, and 280 denier polyurethane elastic fiber as the elastic fiber 3, the knitted structure shown in Fig. 3 was obtained. A stretch warp knitted fabric was knitted. In addition, in order to impart water absorption and moisture absorption properties to the elastic warp knitted fabric of the present invention, 80-count cotton was used as the inelastic fiber 4 [knitted with 7 insertions].

The obtained knitted fabric was dyed and finished using a beam dyeing machine in a conventional manner. In addition, except for the reed L2 in FIG. 3, a comparative knitted fabric was knitted with 1 and 41 inelastic fibers and 3 elastic fibers, and was dyed and finished in the same manner.

Regarding the obtained knitted fabric, the number of threads of the elastic fibers 3 was measured by the following measuring method.

Tension measuring device: Tensilon tensile tester (Toyo Baldwin ■#) Sample measurement conditions: As shown in Figure 4, make a cut (A) in the silk fabric (sample) (/, cIn), and measure in the direction of the arrow (B). Pulled by machine.

As a result of the measurement, the elastic warp knitted fabric of the present invention has one elastic fiber 3
It took a force of 90f to pull out a distance of 5G.
On the other hand, nine knitted fabrics prepared for comparison were pulled out with a force of 369 and 40 inches of the present invention.

<Effects of the Invention> In the stretchable warp knitted fabric of the present invention, the elastic fibers 2 form needle loops partially or over the entire course, so the threads will not come off unless the threads are cut. Since the elastic fibers 3 contact and intertwine with the sinker loops of the elastic fibers 2, the pulling force increases due to the frictional resistance between the elastic fibers. There is no need to perform heat treatment so high that the secondary elastic fibers fuse, and there is no decrease in the strength of the elastic fibers themselves. Furthermore, since the elastic fibers 2 are made of extremely thin denier elastic fibers compared to the elastic fibers 3, even when knit loops are formed using the 2 fabrics, there is no sense of the thickness of the fabric.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a loop structure of a stretchable warp knitted fabric according to an embodiment of the present invention. Figures 2 and 3 are knitting structure diagrams, and Figure 4 shows a method for measuring the number of elastic fiber threads and force of silk fabric. 1... Inelastic fiber! -L... Needle loop made of inelastic fiber, l-2... Sinker loop made of inelastic fiber, 2.3... Elastic fiber, 2-L... Needle loop made of elastic fiber, 2-2. ... Sinker loop made of elastic fiber, A ... Cut position in silk fabric, B ...
Tensile direction Patent applicant: Asahi Kasei Industries, Ltd. Figure 1 Figure 2

Claims (2)

[Claims] (1) A warp-knitted fabric formed from elastic fibers and inelastic fibers, in which at least one type of elastic fibers among at least two types of elastic fibers is looped partially or completely in the yarn, and A stretch warp knitted fabric characterized in that the sinker loops thus formed and the remaining inserted elastic fibers are intertwined with each other. (2) A warp-knitted fabric formed from elastic fibers and inelastic fibers, in which elastic fibers are supplied from at least two reeds, and the elastic fibers supplied from at least one of these reeds are partially or completely distributed. 1. A method for producing a stretch knitted fabric, which comprises looping the yarn and intertwining a sinker loop formed by the yarn with an elastic fiber supplied and inserted from another reed.