JPS59204967A - Improvement in feeling of raised cloth foil - 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 The present invention is a method for improving the texture of a napped fabric for imparting a feeling of weight and a soft texture similar to that of natural suede to a napping fabric made of synthetic fibers having fluff with a single filament fineness of 1 denier or less. It is related to.

Conventionally, various processing methods have been used to make raised fabrics similar to natural suede. For example, a method of making a nonwoven fabric using fM fine fibers, maintaining strength and giving it a texture with urethane resin, and then fluffing the surface to give it a suede look;
Similarly, this method involves weaving and knitting woven or knitted fabrics using ultrafine fibers, raising them, and applying urethane resin or a softener to give them a suede look.

However, the former method using non-woven fabric is not suitable.

The appearance and touch are similar to suede, but 2
Due to the need to maintain strength, a large amount of urethane is used, which has the disadvantage of giving it a rubber-like feel. Also, the latter is a tissue in which the ultrafine fibers are raised. The texture and touch of the woven and knitted raised fabric is good.

It tends to be bulky, does not feel heavy inside the fabric, and is far from a natural suede look.

For this purpose, we use a combination of urethane resin and softener.
Attempts have been made to improve the appearance of suede, but increasing the amount of urethane resin causes problems such as adhesion between the fluffs of the raised fabric and a rough and hard texture. Therefore, in order to improve this condition, a method is being used that uses a combination of kneading in liquid, kneading with a finishing machine, etc.

I couldn't get a feeling of weight inside the raised fabric.

The texture can only be fluffy.

In order to solve these problems, the inventors of the present invention have conducted intensive research and found that if a fabric in a raised state is heat pressed at high temperature and then kneaded with hot water in a rope shape, it will have an appearance similar to that of a natural suede product with a double weight feel. , we discovered the fact that texture can be obtained2.
We have arrived at the present invention.

That is, in the present invention, a raised fabric having a single yarn fineness of 1 denier or less is heated at a temperature of 150 to 2300 C to reduce its thickness by 10 to 50%, and then the fabric is shaped into a rope. The gist of the present invention is a method for improving the feel of a raised fabric, which is characterized by subjecting it to kneading treatment in hot water at 40 to 140'C.

Two aspects of the present invention will be described in detail below. The raised fabric having fluff with a single yarn fineness of 1 denier or less used in the present invention refers to the fabric 2
It is composed of a structure in which short fibers or long fibers of synthetic fibers such as polynucleotide fibers, polyamide fibers, and polyacrylic fibers are present alone or in combination on the surface of knitted fabrics, nonwoven fabrics, etc., or on both the front and back sides. These ultrafine fibers have a yarn fineness of 1 denier or less, and after being raised.

This is a raised fabric that has short fluff on the front or both sides of the fabric. As for non-woven fabrics, polyurethane resin may be used as a binder to maintain strength.

In addition, for textiles, we have twill (fill) in the weft direction, satin, etc.! Ji weave is suitable as soon as the nap is brushed.

For knitting, task reversible or tuck mock rody structures are suitable for circular knitting, and satin M is suitable for warp knitting.
1 weave is preferable. In either case, it is necessary that the ultra-fine fR pheasant becomes short fluff after raising and appears on the front side of the fabric or on both sides of the fabric.

As for the raising method, a raising machine using cloth rolls, sand rolls, sand belts, etc. is very heavy. The single yarn fineness is set to 1 denier or less in order to make the appearance, turn edges, finger marks, and texture of the raised fabric, which has 9 naps after raising, approximate to that of natural suede. If the denier is 1 denier or more, the texture will be hard and the touch will be rough and hard, making it difficult to get the finger marks seen in natural suede.

In addition, the shorter the length of the fluff after raising, the more preferable it is because it will give a suede-like appearance. If the fluff is long, the fuzz will become entangled with each other and form a pill.

In the experience of the present inventor, the length is preferably in the range of about 0.2 to about 1 m, but it is acceptable for some fluff to be included outside this range.

In the present invention, the above-mentioned raised fabric is subjected to a heat press treatment at 150 to 260°C to reduce the thickness of the fabric by 10 to 50 cm. This high-temperature heat press treatment is an important step of the present invention for increasing the attractiveness of the raised fabric. Calendar is a heat press processing machine.

Presses, transfer printing machines, etc. can be used. Calenders and rotary presses require high pressure and short-time processing, while transfer printing machines require low pressure and long-time processing.

When using any of these, heat the roll at 150 to 2'50℃.
temperature and bring it into direct or indirect contact with the surface of the raised fabric. The processing time is usually several seconds when using a calendar or rotary press, and usually several tens of seconds when using a transfer printing machine. The pressure depends on the type of raised fabric and its thickness is 10mm to improve durability. Below 1500C, the setting property of heat press is insufficient for synthetic fibers, and above 230℃ it is insufficient for synthetic fibers. Fibers tend to suffer from hardening, yellowing, and dye weeping (9 strong, low -1), so the car is not heavy. The most common heat press temperature is 170-210°C. When the thickness is reduced by 10 to 50%, the weave density Jli per unit volume increases, so even if the fabric is made from the same base fabric, the weight fit F6 increases and a texture similar to that of natural suede is obtained. If the decrease in thickness is less than 10 inches, the increase in the feeling of stability will be small and the object of the present invention cannot be achieved.

In addition, reducing the thickness by more than 50% is done under high temperatures, which makes it difficult to use materials such as rolls for the bridges and belts for the bridges, resulting in increased costs. It is paper-like and degrading.

The most preferred thickness reduction is 30-40%.

Single yarn #'I1. When a raised fabric having a fluff of 1 denier or less is subjected to heat press treatment at 150 to 230°C and the thickness of the fabric is reduced by 10 = saqb, the weight fr[ increases, and at the same time, the gloss of the surface of the raised fabric increases, The flatness and fluff adhere to the base fabric, and if left as is, it will not look like natural suede. Therefore, in the present invention, next
Perform kneading treatment with warm water at ℃. This warm water kneading treatment frees the fuzz that had adhered to the base fabric, resulting in a product with a quality close to that of natural suede.

As the hot water kneading treatment device, a rope-shaped washing machine or dyeing machine used in general dyeing factories is preferably used. For example, Wins, jet dyeing machine, etc. In the method of the present invention, it is more preferable to use a liquid flow type dyeing machine that has a reel or jet nozzle and that actively moves the treated fabric and treatment liquid rather than a wince.

The hot water kneading treatment may be carried out using hot water at a temperature of 40° C. to 140° C., and a finishing aid may be used if necessary.

Alkali for other purposes such as improving color fastness, etc.
A surfactant, a reducing agent, and an antifoaming agent may be used in combination. Also,
Alkali and the like have a weight-reducing effect on polyester IV fibers, and are advantageous in softening the texture. By performing this warm water kneading process.

A highly flat, glossy, hard-textured raised fabric with fluff that adheres to the base fabric through high-temperature heat press treatment has been improved.

The fluff that had adhered to the base fabric is freed, giving it a weight and soft texture close to that of natural suede.

After hot water treatment, dehydration and drying may be performed, and an antistatic agent or softener may be applied as necessary.

Further, a hand feel improver such as polyurethane resin or a water repellent may be used in combination.

Furthermore, by using an embossing calendar with the wrinkled pattern of cowhide during heat press processing, or by using transfer paper printed with the wrinkled pattern of cowhide when using a transfer printing machine, and performing transfer printing at the same time as heat pressing. By imparting weight and soft texture to the raised fabric, it is possible to easily obtain a quality similar to that of natural suede products.

Next, the method of the present invention will be explained with reference to Examples.

The present invention is not limited in any way by this.

Example 1 Polyester false twisted yarn 75 denier/66 as warp
Filament (filament ff 1 degree approx. 2 dennies/I/
), the S twist was further twisted 600 times, and the weft was a wood board twisted yarn of polyester filament yarn 55 denier/196 filament (filament fineness approximately 028 denier) with the S twist end false twisted 280 times/m. A 5-ply satin fabric with double weft was woven. The width immediately after the Enjo is 175 yen,
Warp density 110 wood/inch, weft density 178 wood/inch, 1
The weight of the sample was 86 g.

The edges were coated with cloth and regular Lux, scoured and dyed brown, then set in a pin tenter at 170°C for 50 seconds. Next, use a hydraulic needle cloth raising machine to brush the front side 1.0 times.

The back side was brushed four times to create a large amount of short fluff on the front side, and a slightly lower fluff density on the back side.

In the raising process, in order to produce especially short fluff with a high density, a slightly stronger tension was applied to the cloth than usual, and the number of times of raising was increased under weak conditions. After raising, heat setting was performed at 180° C. for 40 seconds using a pin tenter in order to remove wrinkles and measure dimensional stability. The napped fabric at this time had a width of 162α, a thickness of 0.67rra, and a basis weight of 124gβ.

Next, using a transfer printing machine, a transfer paper on which cowhide-like wrinkles were printed on the entire surface in dark brown using a conventional disperse dye was sandwiched between the surface of the raised fabric and a hot roll, and heat press treatment was continuously performed. The heat roll surface temperature was 215°C and the treatment time was 68 seconds. The thickness after the hot press treatment was 0.41 ++ In, which was a thickness reduction of about 39%.

The surface of the raised fabric had a fairly strong luster with cowhide-like wrinkles transferred to the entire surface, and most of the fuzz on the surface was also tightly adhered to the base fabric as if it were embedded.

The amount of N was felt to be sufficient compared to before hot pressing, but the texture was paper-like and different from natural suede.

Next, using a Rustam type jet dyeing machine manufactured by Dairy Industries Co., Ltd., the bath ratio was 1:26. Rope kneading treatment was performed for 20 minutes at a cloth speed of 1som/ep and a temperature of 80°C. In addition, water 11! Our hydrosulfite 2V, soda ash 29.
1 g of surfactant was also used.

After washing with water, it was spread, dehydrated with a mangle, and then dried with a roller dryer. The thickness was 0.46++ m, which was about a 10% thickness recovery compared to after the hot press treatment, but the thickness decreased by about 31 inches from before the hot press treatment. The width at this time is 131 cm, and the 14 sun is 1259/d.

The warp density was 147-pairs, and the weft density was 192 wood/inch. In addition, the strong gloss before hot water kneading treatment is reduced and becomes a moderate gloss, and the adhesion of the surface fuzz is eliminated, resulting in a suede-like fluff. It was similar to natural suede products.

In addition, due to its strength due to its dual structure, there was no problem in using it as clothing even though it was a thin material, and it also had excellent color fastness and dimensional stability after washing because it was subjected to hot water kneading treatment.

In addition, for comparison, the product that was not subjected to heat press treatment did not have a proper gloss and did not have a good texture.

When evaluating the fluff condition and the condition of the base fabric, it was found that it was close to cotton flannelette, fluffy, and did not have a heavy feel, but was far from natural suede-like.

Patent applicant: Unitika Co., Ltd.

Claims (1)

[Claims] (1) A raised fabric having fluff with a single yarn fineness of 1 denier or less is coated with 150
A method for improving the feel of a raised fabric, characterized by carrying out a heat plen treatment at a temperature of ~260°C, and then subjecting the fabric to a hot water kneading treatment of 40 to 140°C in the form of a rope.