JPS5916024B2 - How to raise knitted fabrics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for raising knitted fabrics in which the raised portions are made of filament yarns, and it is possible to efficiently produce long-pile knitted fabrics, which could not be obtained by conventional needle cloth raising methods. Our objective is not only to obtain fabrics, but also to create fabrics with excellent texture and surface touch.

Conventionally, knitted fabrics using filament yarns are more difficult to raise than knitted fabrics using spun yarns, and it has not been possible to obtain raised products with long piles.

In particular, it is more difficult to raise the fabric with a fabric using a hard and strong filament yarn such as polyester.

On the other hand, although it is easy to raise the fluff of knitted fabrics using spun yarn, there is a drawback that the fluff easily falls off.

In order to prevent this, if the form of the fabric is fixed with resin, the texture will inevitably become stiff.

Therefore, studies have been made to obtain a long-pile fabric using filaments, but nothing satisfactory has been achieved.

The inventors of the present invention have conducted intensive studies to eliminate such conventional drawbacks, and have discovered that it is possible to create a napped product with long pile length, fine texture, and excellent texture and surface touch by using a knitted fabric made of filament yarn. We have arrived at the present invention.

That is, the present invention is a method for raising knitted fabrics, which comprises puffing a knitted fabric whose raised portions are made of filament yarns, and then raising needle cloths.

According to the present invention, it is not only possible to easily obtain a long-haired product, but there is no trouble in the raising process, and it has a nap state different from that of conventional raised products, and has a unique texture. The company provides brushed products.

The method of the present invention will be explained in detail below.

Although the filament yarn referred to in the present invention is not particularly limited, it is generally made of polyester, polyamide, glyacrylic, etc., and crimped yarn such as temporary twisting may be preferable.

There is no particular limitation on the fineness of the fibers constituting the yarn, but ultrafine fibers with a fineness of 0.5 denier or less are particularly suitable.

Furthermore, in the present invention, the applied force of knitted fabrics often has a greater effect than that of knitted fabrics.

This is because it is originally harder to obtain naps with long piles from woven fabrics.

Relaxing, scouring, dyeing, and finishing processes can be incorporated as appropriate before and after puffing and raising the cloth.

Using the above-described knitted fabric in which the raised portion is made of filament yarn, puffing is performed before raising the clothing.

Puffing can be done using sandpaper or something similar.

The grain size of the sandpaper may be selected depending on the type of knitted fabric, but the conditions must be such that some of the filaments in the raised area are to be cut.

In addition, the processing speed, the number of revolutions of the puffing roll, and the contact length between the puffing roll and the fabric must be selected depending on the form of the fabric and the type of filament.

It is better to pass the puff through as many times as possible, but if the number of passes is too high, the hair will fall out and the fabric will be damaged, and on the other hand, if the number of passes through the puff is too small, uneven hair raising is likely to occur.
~3 times is appropriate.

The knitted fabric that has been puffed in this manner is then subjected to a napping process using a napping machine equipped with a clothing roll.

The type of clothing used is not limited, but clothing for cutting and raising is particularly suitable.

Further, there are various types of napping machines such as hydraulic type, French type, and electromagnetic type, but there is no particular limitation, and the method of the present invention is rather effective for a napping machine with a small napping force.

According to the present invention, it is possible to easily obtain a raised product with a long pile from a knitted fabric in which the raised part is made of filament yarn, and to maintain a soft texture. This is because when a part of the filament yarn is cut with a puff, the fabric structure, which has been fixed in shape through heat treatment, is relaxed, making it easier to pull out the fibers during raising.

In other words, the puffing treatment eases the conditions for raising the cloth,
This is because the weft yarns are not pulled by the clothing, and therefore the width shrinkage during raising is reduced.

After carrying out the napping in the US invention, by appropriately incorporating the steps of puffing and napping, it is possible to improve the denseness of the nap and obtain a napped fabric with uniform pile length.

On the other hand, if the cloth is puffed after raising the cloth, it is not possible to suppress the width shrinkage of the knitted fabric during the raising of the cloth, and it is also impossible to pull out long naps by puffing.

Next, the present invention will be explained in more detail by examples.
This application is not limited to this.

Example 1 Relaxation, scouring, and setting into a fabric with 5 sheets of satin on the surface and 2/3 twill on the back, where the raised part is made of ultrafine fibers obtained by dividing sea-island composite fibers as shown below. was applied.

Warp: 50 D-24fil polyester temporary twist Face weft: 245D-1440fil polyester back weft: 50 D-24fil polyester temporary twist Puff treatment was performed under the following conditions.

Processing speed: 25 m/min Number of passes = 2 times Puffing paper particle size = 120 mesh Puffing roll rotation speed: 1050 rpm After that, a hydraulic napping machine using a napping cloth for cutting and napping was used to process the material at a processing speed of 15 m/min for 10 minutes. A double-fleece process was performed.

At the same time, the fabrics that were not puffed were also treated with napping as a comparative example.

As shown in the following table, the raised fabrics obtained by the present invention had very long limbs compared to the fabrics obtained by the conventional method, and were relatively soft with a small width shrinkage rate.

Example 2 The raised product obtained in Example 1 was further passed under the same conditions as in Example 1, subjected to one puff treatment, and then raised five times.

As a result, it was possible to obtain a raised product with more uniform hair length and better nap density than the raised product obtained in Example 1.

Example 3 50D-48fil polyamide on the front, 5 on the back
A tricot using 0D-24fil polyamide was knitted, relaxed, scoured and heat set in the usual manner, and puffed under the following conditions.

Processing speed: 15 m/min Number of passes = 2 times Puffing paper particle size: 120 mesh Puffing roll rotation speed: 11050 rp After that, brushing was performed 10 times under the same conditions as in Example 1, and dyeing was performed. Ta.

As a result, a raised product with long limbs could be obtained without impairing the texture of tricot.

Comparative Example 2 In Example 1, after the puff treatment, a brushing treatment using a pig hair brushing roll was performed instead of the raising treatment of the present invention.

Although the obtained raised product had a width shrinkage rate of 0% by brushing, the length of the pile was 1 to 2 inches, and the intended raised product could not be obtained.

Claims (1)

[Claims] 1. A method for raising a knitted fabric, which comprises puffing a knitted fabric in which the raised part is made of filament yarn, and then raising the knitted fabric with a needle cloth.