JPH0921065A - Method for producing fabric containing fibrillated regenerated cellulosic fiber - Google Patents

Abstract

(57) [Summary] [Purpose] Has a high-quality appearance of silk washer,
And smooth micro powder feeling, rich swelling feeling,
And a fabric containing fibrillated regenerated cellulosic fibers having excellent resilience and excellent texture. [Structure] An undyed cloth containing regenerated cellulosic fibers is treated at a temperature of 80 ° C. or higher and 140 ° C. or lower at 1 g /
A method for producing a fabric containing fibrillated regenerated cellulosic fiber, which comprises a step of immersing in a sodium hydroxide aqueous solution having a concentration of liter or more and 30 g / liter or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fibrillated fabric containing regenerated cellulosic fibers, and in particular,
By fibrillating the cellulose monofilament on the surface of the cloth, it has a silk-washer-like high-quality appearance, and has a smooth micro-powder feeling, a rich swelling feeling, and high resilience, and an excellent texture. To a method of manufacturing.

[0002]

2. Description of the Related Art Conventionally, there have been known many methods for producing a cloth made of cellulosic fibers having a silk washer-like appearance.

As a method of producing a cloth having the appearance of this silk washer, for example, Japanese Patent Application Laid-Open No. 4-257 is known.
No. 366, a treatment liquid containing a terminal-modified polysiloxane and methylhydrogenpolysiloxane is applied to a cloth made of a cellulosic fiber, and the treatment liquid is crushed in the interior of the treatment machine in a gas phase to prevent mechanical impact. A method of exposing is disclosed. Japanese Patent Laid-Open No. 1-298273
In the gazette, a fabric made of cellulosic fibers is subjected to strong calcination, desizing using a jet dyeing machine, scouring, and dyeing, and then kneading with a washer or the like. A method of doing so to obtain a fabric having a silk washer-like appearance is disclosed. Further, Japanese Unexamined Patent Application Publication No.
No. 50380, a cloth made of cellulosic fibers is treated with an aqueous solution containing a metal salt of an organic acid having 5 or less carbon atoms such as potassium acetate and ammonium chloride, and a cellulase enzyme, and a silk washer. A method of obtaining a fabric having a tonal appearance is disclosed.

However, in the methods described in JP-A-4-257366 and JP-A-4-50380, fluff frequently occurs on the surface of the fabric, and the fluff is fibrillated to give the appearance of the obtained fabric. May be significantly reduced. When the composite fabric containing polyester and cellulosic fibers is subjected to strong calcination using the method described in JP-A-1-298273, melted polyester beads are produced, and as a result, the resulting fabric is produced. There are drawbacks such as uneven dyeing. Furthermore, if a process of such fibrillation processing is newly incorporated into the conventional manufacturing process, the processing time is extended and a new device is required, which increases the manufacturing cost of the obtained fabric.

[0005]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, has a high-quality appearance of silk washer, and has a smooth micro-powder feeling, a rich swelling feeling, and a high elasticity. It is an object of the present invention to provide a method for producing a fabric having repellency and excellent in texture.

[0006]

The method for producing a fabric containing fibrillated regenerated cellulosic fibers according to the present invention comprises a non-dyed fabric containing regenerated cellulosic fibers,
1g / liter or more at a temperature of 80 ° C or higher and 140 ° C or lower 3
The step of immersing in a sodium hydroxide aqueous solution having a concentration of 0 g / liter or less is included. In the present specification, the term “fibrillated” refers to a state in which the side surface or the end portion of the regenerated cellulose-based single fiber is subdivided into branches in the fiber axis direction.

Hereinafter, the present invention will be described in detail.

The regenerated cellulose fibers used in the present invention include undyed regenerated cellulose fibers such as viscose rayon and polynosic rayon.

The cloth used in the present invention may be a woven fabric, a knitted fabric, or the like as long as it contains the regenerated cellulosic fiber.
For example, a cloth containing the regenerated cellulosic fibers alone, a cloth containing a yarn obtained by mixing or weaving the regenerated cellulosic fibers with other fibers such as polyester and nylon, and the regenerated cellulosic fibers and other fibers. Can be either a woven or a knitted fabric.

A fabric containing the above undyed regenerated cellulosic fibers is dipped in an aqueous sodium hydroxide solution.

The sodium hydroxide aqueous solution used in the present invention has a temperature of 80 ° C. or higher, 140 ° C. or higher when the cloth is dipped in order to fibrillate the regenerated cellulosic fibers.
It is necessary to be less than or equal to ° C. Particularly, in order to obtain sufficient fibrillation, the temperature is preferably 120 ° C. or higher and 130 ° C. or lower.

Further, the aqueous sodium hydroxide solution used in the present invention is adjusted to a concentration of 1 g / liter or more and 30 g / liter or less in order to give the resulting fabric a feeling of micropowder, swelling and the like. . When treated at a concentration higher than 30 g / liter at the above temperature, the strength retention of the regenerated cellulosic fiber (ratio of strength after treatment to strength before treatment) is significantly reduced to 60% or less, impairing practicality. Be done. Considering the sufficient fibrillation and reduction in strength of regenerated cellulosic fibers, and the influence on other fibers (especially excessive weight loss of polyester), the concentration of the aqueous sodium hydroxide solution is
It is preferably 1 g / liter or more and 10 g / liter or less, and most preferably 2 g / liter or more and 4 g.
/ Liter or less. Cloth threads, other auxiliaries for atari, and agents may also be added to the aqueous solution.

The dipping time of the cloth is from 30 minutes to 180 minutes, preferably from 50 minutes to 120 minutes, from the viewpoints of appropriately reducing the amount of polyester fibers and adding a rubbing action to the cellulose fibers.

The dipping step in the sodium hydroxide aqueous solution as described above can be carried out simultaneously with the desizing and refining steps. Furthermore, when a cloth containing regenerated cellulosic fibers and polyester is used, by carrying out this dipping step, the regenerated cellulosic fibers can be fibrillated and an appropriate amount of polyester can be reduced. It is not necessary to separately carry out the weight reduction step.

The above-mentioned dipping step can be preferably carried out simultaneously with the step of treating the fabric using a jet dyeing machine in order to add a rubbing action to the fabric. This treatment step is not particularly limited, but an appropriate treatment step is selected so as not to cause defects such as thread scarring and pitting of the cloth, and to uniformly cause fibrillation of the regenerated cellulosic fiber. When the above dipping step is performed in a jet dyeing machine, the flow rate of the jet dyeing machine is adjusted to 60 seconds / time to 120 seconds / time for the flow rate of the jet dyeing machine, from the viewpoint of preventing the threads from being scratched and attrition To be done.

When immersed in an aqueous sodium hydroxide solution at a specific temperature as described above, the regenerated cellulosic monofilaments on the surface of the fabric cause minute fibrillation, and the fibrillated fabric (fibrillated fabric) is silk-washer-like. It has a high-grade appearance and a smooth micropowder feeling. Furthermore, the minute fibrils of this regenerated cellulosic fiber provide the fabric with a rich bulge, and
Entangling with each other forms tufted microscopic solids on the surface of the fabric, increasing the resilience of the fabric.

The resulting fibrillated fabric may be subjected to conventional dyeing and finishing processes, if desired.

[0018]

The present invention will be described with reference to the following examples.

Example 1 Woven fabric made of 100% polynosic fiber (plain weave, 60/1 ^s × 60/1 ^s , 180 yarns ×)
180 lines / inch) with a jet dyeing machine (manufactured by Hisaka Seisakusho)
12 g of sodium hydroxide, 2 g of refining agent, and 2 g of anti-threatory agent were added to prepare 1 liter of
It was immersed in a solution at 0 ° C. for 60 minutes, and simultaneously with desizing and refining, fibrillation was performed. After this, wash,
The woven fabric was dyed with a reactive dye using the jet dyeing machine described above, and finish-processed by an ordinary softener to obtain a fibrillated fabric.

The sensory evaluation by a skilled engineer was carried out as follows for the degree of fibrillation, micropowder feeling, elasticity, swelling and softness of the obtained fabric.

<Degree of fibrillation> It was observed under a microscope of 200 times. The degree of fibrillation is as follows. ◎ ………… It was a very large amount. ○ ……… There was a large amount. △ ……… It was a small amount. × ……… It was a very small amount.

<Micropowder Feeling> Evaluation was made by a handling method. The feeling of micro powder is as follows. ◎ ……… It was very good. ○ ……… It was excellent. △ ……… It was inferior. × ………… It was very inferior.

<Repellent property> Evaluation was made by a handling method. The repellency is as follows. ◎ ……… It was very good. ○ ……… It was excellent. △ ……… It was inferior. × ………… It was very inferior.

<Puffiness> Evaluation was made by a handling method. The swelling feeling is as follows. ◎ ……… It was very good. ○ ……… It was excellent. △ ……… It was inferior. × ………… It was very inferior.

<Softness> Evaluation was made by a handling method. The softness is as follows. ◎ ……… It was very good. ○ ……… It was excellent. △ ……… It was inferior. × ………… It was very inferior.

The results are shown in Table 1.

(Example 2) 70% by weight of polynosic fiber
And a composite fiber woven fabric made of a blended yarn of 30% by weight of polyester (plain weave, 60/2 ^s × 60/2 ^s , 90 × 80 /
Inch) using a jet dyeing machine (manufactured by Hisaka Seisakusho Co., Ltd.), 3 g of sodium hydroxide, 2 g of refining agent, 2 of anti-sleaching agent
Water was added to 1 g to immerse in a solution of 135 ℃ prepared for 1 liter for 60 minutes, and at the same time as desizing and refining,
A fibrillation process was performed. After this, it was washed and the polyester part of the woven fabric was dyed with the disperse dye and the polynosic fiber part of the woven fabric was dyed with the reactive dye using the jet dyeing machine. Then, this woven fabric was subjected to finishing processing with a normal softener to obtain a fibrillated fabric.

The cloth thus obtained was evaluated in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 1 The same as Example 1 except that the same woven fabric as in Example 1 was used to perform desizing and scouring using a solution at 135 ° C. containing no sodium hydroxide. A fabric was obtained by the method of.

The cloth thus obtained was evaluated in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 2 Same as Example 2 except that the same woven fabric as in Example 2 was used for desizing and scouring using a solution at 135 ° C. containing no sodium hydroxide. A fabric was obtained by the method of.

The obtained cloth was evaluated in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 3 The same woven fabric as in Example 2 was used, and the concentration of sodium hydroxide was 70 g / l.
A fabric was obtained in the same manner as in Example 2 except that the desizing process and the scouring process were performed using the solution at a temperature of 0 ° C.

The cloth thus obtained was evaluated in the same manner as in Example 1. Table 1 shows the results.

[0035]

[Table 1]

The fabrics of Examples 1 and 2 obtained by the production method of the present invention have a greater degree of fibrillation than the fabrics obtained in any of the Comparative Examples, and have a micropowder feeling, elasticity, and swelling. It was found to be extremely excellent in all aspects of feeling and softness.

[0037]

According to the present invention, the regenerated cellulosic monofilament on the surface of the cloth is ideally fibrillated (finely fibrillated), has a silk washer-like high-quality appearance, and is a smooth microfiber. It is possible to provide a fabric containing a fibrillated regenerated cellulosic fiber, which has a powdery feeling, a rich swelling feeling, and a high resilience and has an excellent texture. Further, in the production method of the present invention, the step of immersing in the aqueous sodium hydroxide solution can be performed at the same time as the desizing process and the refining process, so that the fabric can be produced more easily and economically.

Claims (3)

[Claims] 1. A method for producing a fabric containing fibrillated regenerated cellulosic fibers, which comprises the following steps: a non-dyed fabric containing regenerated cellulosic fibers is treated at 80 ° C. or higher and 140 ° C. 1g / of the following temperature
A step of immersing in a sodium hydroxide aqueous solution having a concentration of liter or more and 30 g / liter or less. 2. The dipping step is 120 ° C. or higher and 135 ° C.
The manufacturing method according to claim 1, which is carried out in an aqueous solution of sodium hydroxide at the following temperature. 3. The manufacturing method according to claim 1, wherein the dipping step is performed in a jet dyeing machine.