JPS6212341B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a warp knitted fabric having pleats. 2. Description of the Related Art Adding pleats to fabrics, particularly woven fabrics, has been practiced for a long time. Furthermore, by adopting thermoplastic synthetic fibers as the fiber material used for the fabric, the ability to retain pleats has also been dramatically improved.

However, the retention of pleats in knitted fabrics is
It is significantly inferior to that of textiles. The reason for this is that compared to woven fabrics, knitted fabrics have a loose structure, the threads move easily, and their shape retention is inferior.
No matter how much thermoplastic synthetic fiber is used, its fold retention is still poor.

The purpose of the present invention is to solve such problems regarding warp knitted fabrics, and to provide a method for manufacturing knitted fabrics that have excellent fold retention and drapability. .

That is, the present invention provides a warp-knitted fabric knitted using a plurality of reeds, in which polyester fiber is fed to the yarn fed to the reed on the rear side of the front reed among the plurality of reeds. The threads to be fed are knitted using polyester fibers that have a lower alkali hydrolysis rate than the polyester fibers, or fibers that are insoluble in alkali, and the threads to be fed to the front reed. A method for manufacturing a warp knitted fabric with pleats, characterized in that knitting is carried out by appropriately arranging three or more courses of misknitted portions, and the resulting knitted fabric is subjected to an alkali weight loss treatment.

The present invention will be explained in detail below.

The warp knitted fabric obtained by the method of the present invention is obtained by supplying yarn to a plurality of reeds and knitting the yarn, and the warp knitted fabric is obtained by supplying yarn to a plurality of reeds and knitting the yarn. The stitch structure of the yarns may be any one used in normal warp knitted fabric structures, and is not particularly limited.

Further, the yarn supplied to the front reed is knitted using a knitting method in which three or more courses of misknitted portions are appropriately arranged. The term "mistake stitch" here refers to knitting a course using yarn fed from a reed other than the front reed, but the stitch is not knitted using the yarn fed from the front reed.
In the method of the present invention, portions where three or more courses are misknitted (ie, misknitted portions) are appropriately arranged. If the number of miss-knitted portions is less than three courses, the pleats formed by the yarn supplied to reeds other than the front reed are small, making it difficult to obtain beautiful pleats.

Furthermore, how to knit a warp knitted fabric by the method of the present invention will be explained with reference to the drawings. FIG. 1 is a knitting method diagram showing an example of knitting a warp knitted fabric according to the method of the present invention.

In other words, Fig. 1A shows the knitting method using yarn feeding from the front reed, the numbers on the left side indicate the course number, and the numbers on the bottom indicate the position of the reed. Then, the reed moves like 1-0/1-2. Further, in this example, after knitting the 7 courses, the reed is stopped for the 17th course, and the knitting is not performed using the yarn feeding from the front reed (that is, the 17th course is treated as a miss stitch).

Moreover, what is shown in FIG. 1 B and C is the knitting diagram of the middle reed and the back reed by yarn feeding, where the middle reed is 1-2/1-0 and the back reed is 1-0/1-. 2
Move and organize as follows.

FIG. 2 is a sectional view showing a cross section taken in the warp direction of a warp knitted fabric knitted according to the knitting method diagram of FIG. B shows the pleats formed by the yarn feeding of the middle reed and back reed during the miss knitting.

In the warp knitted fabric according to the method of the present invention, such misknitted portions can be appropriately arranged and formed on the knitted fabric at any desired position in the pleats.

The warp knitted fabric according to the method of the present invention is made by such a knitting method, but the yarns used are polyester fibers, which are supplied to the reeds other than the front reed, and the yarns which are supplied to the front reeds. For the strips, it is necessary to use polyester fibers that have a lower hydrolysis rate than the polyester fibers, or fibers that are insoluble in alkali, such as polyamide fibers. For yarn feeding of the front reed,
When polyester fibers are used, for the yarn feeding of the back reed and middle reed, copolymerized polyethylene terephthalate copolymerized with 5-sulfoisophthalic acid, polyethylene terephthalate blended with alkylsulfonic acid and/or polyalkylene glycol, etc. It is recommended to use fibers from

As described above, the warp knitted fabric to be knitted can be subjected to alkali weight loss treatment to obtain a pleated warp knitted fabric with excellent drape properties.

That is, when making a mistake knitting due to the yarn feeding from the front reed, the stitches knitted by the yarn feeding from a reed other than the front reed form pleats, and these pleats are created by the misknitted portion of the yarn feeding from the front reed. , which are not easily stretched and become permanent folds. The pleats referred to in the present invention are made by forming a miss-knitted part using the yarn fed from the front reed, and then tuck knitting it to make the stitches fed from yarns other than the front reed slack. The shape of can be changed in various ways, and can be formed from folds that form a gentle bulge-like protrusion to folds that form a relatively sharp protrusion.

In addition, since this fold part is knitted with polyester fiber, in order to take advantage of its thermoplasticity,
Sharp pleats can be easily formed by high-temperature pressing.

Furthermore, as shown in Fig. 2, the pleats are formed by overlapping knitted fabrics, so permanent pleats tend to impair the drape characteristic of the knitted fabric; By applying an alkali weight loss treatment to the fabric, the binding force between the fibers forming the pleats can be reduced, the shape of the pleats can be maintained, and a warp-knitted fabric with excellent drapability can be obtained.

In addition, since the yarn supplied to the front reed is a fiber that is difficult to be attacked by alkali or a fiber that is not attacked at all by alkali, it is difficult to avoid mis-knitted portions (see Fig. 2A).
The strength of the yarn in the portion shown by ) does not decrease, and the folds do not break due to cutting of the yarn in this portion, making it possible to obtain an excellent pleated warp knitted fabric.

The range of the alkali weight loss rate due to the alkali weight loss treatment is 5 to 35% by weight based on the polyester fibers fed to the reed on the rear side of the front reed.
range is used.

Examples will be explained below.

Example: Using nylon 66 filament yarn (50de/17fil) for feeding the front reed, and using ordinary polyester filament yarn (40de/20fil) for the middle and back reeds, the knitting method shown in Fig. 1 is used. By knitting a warp knitted fabric with pleats, the alkali weight loss rate was 28
% alkali weight loss treatment was performed. The obtained warp knitted fabric had sheep pleats and had extremely excellent drape properties.

[Brief explanation of the drawing]

Fig. 1 is a knitting method diagram showing how to knit a warp knitted fabric according to the method of the present invention, and Fig. 2 is a sectional view showing a cross section in the warp direction of the warp knitted fabric knitted according to the knitting method diagram in Fig. 1. It is.

Claims (1)

[Claims] 1. In a warp knitted fabric knitted using a plurality of reeds, polyester fiber is fed to the yarn fed to the reed on the rear side of the front reed among the plurality of reeds, and the yarn fed to the front reed is In this method, a polyester fiber having a lower alkali hydrolysis rate than the polyester fiber or a fiber insoluble in alkali is used to knit the yarn, and the yarn fed to the front reed is knitted in 3 steps. A method for manufacturing a warp knitted fabric, which is carried out by suitably arranging misknitted portions larger than a course, and subjecting the resulting knitted fabric to an alkali weight loss treatment.