JPH08158264A - Method for processing cellulose-based textile fabric - Google Patents

Abstract

PURPOSE: To provide a processing method intended to afford cellulose-based textile fabric with excellently soft and resilient tough feeling. CONSTITUTION: Cellulose-based textile fabric is impregnated with an one-bath treatment liquor comprising a water-based polyurethane resin, epoxy compound, epoxy-modified organopolysiloxane, amino-modified organopolysiloxane and metal salt-based acid catalyst, being dried and heat-treated, and then subjected to flex treatment with a batch-type dyeing machine. The polyurethane resin is pref. a polyurethane made from a polyether and aliphatic isocyanate, the epoxy compound is e.g. glycerol polyglycidyl ether, and the modified organosiloxane is e.g. an epoxy-modified or amino-modified silicone softener, each publicly known as a textile finisher. The flex treatment is pref. conducted simultaneously with dyeing operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method for imparting a soft and repulsive texture having excellent washing durability to a cellulosic fiber cloth.

[0002]

2. Description of the Related Art In recent years, in the garment field, a soft and repulsive texture has been favored. Traditionally, such a texture has been used in the finishing process after scouring, bleaching, and dyeing the fabric. A silicone softener is used as a processing agent to provide a soft texture. In order to create a texture with a urethane resin,
The cloth is impregnated with a single treatment solution or a mixed treatment solution of these chemicals, and a heat treatment is performed to give the cloth a soft and repulsive texture.

[0003] Many of the ones in which a film is formed on a cellulosic fiber cloth using only a silicone softening agent have excellent film strength and water resistance, but since the bond between the silicon film and cellulose is weak, it is washed. Therefore, there is a problem that the silicon film is likely to be detached. A product obtained by reacting a cellulosic fiber cloth with only a urethane resin has a good resilience but lacks softness because it has a cross-linking reaction with cellulose. The one using the mixed treatment liquid of only the silicone type softener and urethane resin gives a soft and repulsive texture after processing, but the silicone type softener falls off by washing and the texture is rough and hard. There is a problem of becoming. In addition, recently, processing that gives a soft feeling and a volume feeling is performed using a texture processing machine by beating or high-speed transfer, but there is a problem that a special mechanical device is required and processing takes time. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a processing method for imparting a soft and repulsive texture having excellent washing durability to a cellulosic fiber cloth. The purpose is to obtain.

[0005]

The present invention achieves the above object and has the following configuration. That is, in the present invention, a cellulosic fiber cloth is impregnated with a mixed treatment liquid of an aqueous polyurethane resin, an epoxy compound, an epoxy-modified organopolysiloxane, an amino-modified organopolysiloxane, and a metal salt-based acidic catalyst, followed by drying and heat treatment. A gist is a method of processing a cellulose fiber cloth, which is characterized in that a kneading treatment is performed later by using a batch type dyeing machine. Hereinafter, the present invention will be described in detail.

In the present invention, a cellulosic fiber cloth is used as an object to be processed. The cellulosic fiber cloth used here is a cloth mainly using natural fibers such as cotton and hemp, and regenerated fibers such as viscose rayon, and those having a mixture ratio of these natural fibers and regenerated fibers of 50% or more. Preferably, when the mixing ratio is 50% or less, the reaction between the later-described mixing treatment agent and cellulose is reduced, so that a soft and repulsive texture with washing durability can be imparted to the cellulosic fiber cloth. become unable.

In the present invention, first, the above-mentioned cellulosic fiber cloth is impregnated with a mixed treatment liquid of an aqueous polyurethane resin, an epoxy compound, an epoxy-modified organopolysiloxane, an amino-modified organopolysiloxane and a metal salt-based acidic catalyst, followed by drying and heat treatment. I do. As the water-based polyurethane resin used in the present invention, among the long-chain polyols, polyester type polyurethane and polyether type polyurethane, it is preferable to use the polyether type polyurethane from the viewpoint of hydrolysis property. Of the isocyanate-based polyurethane and the aliphatic isocyanate-based polyurethane, it is preferable to use the aliphatic isocyanate-based polyurethane from the viewpoint of light resistance.
It is desirable to use an aliphatic ether type polyurethane resin.

The epoxy compound used in the present invention includes
An epoxy compound having two or more epoxy groups at the end in the same molecule is used, and specific examples thereof include glycerol polyglycidyl ether and sorbitol polyglycidyl ether. The epoxy-modified organopolysiloxane used in the present invention is represented by the following formula 1, and preferably has at least two epoxy groups in the same molecule in order to effectively react with cellulose.

[0009]

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Specifically, a commercially available epoxy modified silicone softening agent may be used as the fiber finishing agent.

The amino-modified organopolysiloxane used in the present invention is represented by the following formula 2, and specifically, an amino-modified silicone softening agent commercially available as a fiber finishing agent may be used.

[0012]

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The amount of each of the above-mentioned water-based polyurethane resin, epoxy compound, epoxy-modified organopolysiloxane and amino-modified organopolysiloxane used varies depending on the desired texture, but the water-based polyurethane resin is 20 to 200 g / liter, The epoxy compound may be used in an amount of 10 to 50% by weight based on the water-based polyurethane resin, and the epoxy-modified organopolysiloxane and the amino-modified organopolysiloxane may each be used in an amount of about 10 to 30 g / liter.

Examples of the metal salt-based acidic catalyst used in the present invention include chlorides such as zinc, magnesium and aluminum, salts such as nitric oxide and borofluoride, and specifically, zinc chloride and magnesium chloride. , Aluminum chloride, zinc nitrate, zinc borofluoride, magnesium borofluoride and the like. The appropriate amount of the metal salt-based acidic catalyst used is 3 to 10% by weight based on the epoxy compound and the epoxy-modified organopolysiloxane, but the amount varies depending on the activity of the catalyst used. It is good to use it after adjusting.

In the present invention, the cellulosic fiber cloth is impregnated with the mixed treatment liquid obtained by mixing the above-mentioned resins. At the time of this impregnation, the cloth is treated with the mixed treatment liquid by using a normal resin processing device such as a padder or a mangle. Immersion, squeezing rate 50-12
The cloth is impregnated with the treatment liquid by squeezing the solution at 0%.

After impregnation with the mixed treatment liquid, the cloth is dried,
Heat treatment is performed at 0 to 180 ° C. for 2 to 4 minutes. In this way, a wash-durable coating is reactively formed on the cellulosic fiber fabric.

Thereafter, the cellulosic fiber cloth is kneaded using a batch type dyeing machine. The batch-type dyeing machines used here include Wins dyeing machines, drum dyeing machines, paddle dyeing machines, jigger dyeing machines, jet dyeing machines, beam dyeing machines,
An airflow dyeing machine can be used, and it is desirable to use an airflow dyeing machine having a high physical rubbing effect. Rubbing treatment conditions of 40 to 80 ° C. for 30 to 60 minutes are sufficient.

In this kneading treatment, it is more rational to perform exhaustion dyeing at the same time and perform the dyeing process also as the kneading treatment process. At this time, the dyes used for exhaust dyeing include direct dyes, reactive dyes, basic dyes, vat dyes, sulfur dyes, naphthol dyes, etc., but reactive dyes are used from the viewpoint of dyeing fastness and versatility. desirable. The dyeing method differs depending on the dye used, but the dyeing method may be an ordinary method generally used for the dye.

As described above, after the durable film was formed by reaction on the cellulosic fiber in the previous step, the kneading treatment was performed in the subsequent step using the batch dyeing machine to obtain a soft and repulsive property. The texture can be imparted to the cellulosic fiber cloth. The present invention has the above configuration.

[0020]

[Function] Polyurethane resin, epoxy compound, epoxy-modified organopolysiloxane, amino-modified organopolysiloxane, without using a mixed treatment solution of a metal salt-based acidic catalyst, if these resins are individually used in different steps by the conventional method, Since the resin and the cellulose are weakly bonded to each other, the resin film formed on the cellulosic fiber cloth is detached due to the washing, so that the washing durable processing cannot be performed. When these resins are used in the same bath, the epoxy compound first reacts with the polyurethane resin, and the strength, water resistance, heat resistance, etc. of the urethane resin film can be improved and a film with excellent repulsion can be obtained. At the same time, the metal salt-based acidic catalyst acts on the epoxy-modified organopolysiloxane to form an epoxy-modified organopolysiloxane. The epoxy group of roxane reacts with the hydroxyl group of cellulose, and it becomes possible to improve the reaction with the hydroxyl group of cellulose by using the amino-modified organopolysiloxane together with the salt of amino amide. As a result, the durability of softness is improved. Will be able to In this way, the physical texture of the fabric becomes even more soft when the physical rubbing treatment is performed using a batch-type dyeing machine with a durable film that has reacted with cellulose formed on the cellulosic fiber. Therefore, it becomes possible to obtain a processed cloth which is the object of the present invention and which has softness and resilience and has the washing durability of its performance.

[0021]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples. Measurement and evaluation of the performance of the fabrics in Examples were carried out by the following methods. (1) Softness With respect to the fabric after finishing the processing and after the washing durability test according to the item (3) below, the soft feeling was relatively evaluated in the following three stages by a touch-sensitive test. ○ Good △ Normal × Poor (2) Repulsion Repulsion of the fabric after processing and after the washing durability test according to item (3) below is relatively evaluated by the touch test by the following three grades. did. Good Good Fair Normal Poor (3) Washing durability test Wash 30 times according to JIS L-0217 (method 103).

Example 1 A plain weave fabric made of 100% cotton (warp 18s /-, weft 18s /-; warp density 110 yarns / inch, weft density 55 yarns / inch) was prepared. Impregnated with treatment liquid,
After squeezing and squeezing with a mangle at a squeezing rate of 80%, it was dried with a pin tenter at 100 ° C. for 2 minutes, and then heat-treated at 160 ° C. for 3 minutes.

Formulation 1 Evaphanol N 100 g / liter (water-soluble urethane polymer, Nichika Chemical Industry Co., Ltd.) NK Catalyst CS 5 g / liter (catalyst, Nika Chemical Industry Co., Ltd.) Denacol EX-314 10 g / liter (epoxy Compound, manufactured by Nagase Kasei Co., Ltd.) PORON MF-18 50 g / liter (epoxy-modified polysiloxane emulsion, manufactured by Shin-Etsu Chemical Co., Ltd.) Zinc borofluoride 6 g / liter Nikka Silicon AM-3000 50 g / liter (amino-modified polysiloxane) Emulsion, Nika Chemical Industry Co., Ltd.)

Then, using a jet dyeing machine, a dyeing solution of the following formulation 2 was used to raise the temperature from the temperature of 20 ° C. to 0.5 at a bath ratio of 1:20.
The temperature was raised at a rate of ° C / min and exhaust dyeing and kneading treatment was carried out at 80 ° C for 60 minutes to obtain a processed woven fabric of the present invention.

Formulation 2 Kayacion Blue AB 3% owf (reactive dye, manufactured by Nippon Kayaku Co., Ltd.) Anhydrous Glauber's salt 80 g / liter Soda ash 20 g / liter

For comparison with the present invention, exactly the same method as in the present embodiment except that the exhaust dyeing of the prescription 2 in this embodiment is performed before the treatment of the prescription 1 and then the treatment of the prescription 1 is performed. Thus, a processed woven fabric for comparison (Comparative Example 1) was obtained.

For comparison with the present invention, Formulation 1 to Denacol EX-314, Polon MF-18,
A processed woven fabric for comparison (Comparative Example 2) was obtained by the same method as that of this Example except that zinc borofluoride and Nikka Silicon AM-3000 were removed.

Further, for comparison with the present invention, a comparison was made by the same method as in this example except that Evaphanol N, NK Catalyst CS, Denacol EX-314 and zinc borofluoride were excluded from Formulation 1 of this example. A processed woven fabric (Comparative Example 3) was obtained.

The performances of the present invention and the comparative woven fabric were evaluated, and the results are shown together in Table 1.

[0030]

[Table 1]

As is clear from Table 1, the processed woven fabric produced by the method of the present invention is soft and repellent, and is excellent in washing durability.

Example 2 Twill fabric with 100% rayon bleached (warp yarn 30 /-,
Weft thread 30 /-; warp density 140 threads / inch, weft density 70 threads / inch) are prepared and impregnated with the treatment liquid of the following prescription 3
After squeezing and squeezing with a mangle at a squeezing rate of 90%, it was dried with a bottle tenter at 100 ° C for 2 minutes and then at 160 ° C for 3 minutes.
Heat treatment was performed for 1 minute.

Formulation 3 Evaphanol N 30 g / liter (water-soluble urethane polymer, Nichika Chemical Industry Co., Ltd.) NK Catalyst CS 1.5 g / liter (catalyst, Nika Chemical Industry Co., Ltd.) Denacol EX-314 3 g / liter (Epoxy compound, manufactured by Nagase Kasei Co., Ltd.) PORON MF-18 30 g / liter (Epoxy-modified polysiloxane emulsion, manufactured by Shin-Etsu Chemical Co., Ltd.) Zinc borofluoride 4 g / liter (45% aqueous solution, reagent first grade) Nikka Silicon AM-3000 30 g / liter (amino-modified polysiloxane emulsion, manufactured by Nika Chemical Industry Co., Ltd.)

Next, with the dyeing solution of formulation 2 used in Example 1, exhaust dyeing and kneading treatment was performed under the same conditions as in Example 1 using a jet dyeing machine to obtain a processed fabric of the present invention. .

For comparison with the present invention, except that the exhaust dyeing and kneading treatment according to the prescription 2 of the embodiment 1 incorporated in the present embodiment is performed first, and then the treatment according to the prescription 3 is performed, the same as the present embodiment. A processed woven fabric for comparison (Comparative Example 4) was obtained by the same method.

The performances of the inventive and comparative fabrics were evaluated and the results are summarized in Table 2.

[0037]

[Table 2]

As is clear from Table 2, the processed woven fabric produced by the method of the present invention is soft and repellent, and is excellent in washing durability.

[0039]

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a cellulosic fiber cloth which is soft and repellent and has excellent washing durability.

Claims (1)

[Claims] 1. A cellulosic fiber cloth is impregnated with a mixed treatment liquid of an aqueous polyurethane resin, an epoxy compound, an epoxy-modified organopolysiloxane, an amino-modified organopolysiloxane and a metal salt-based acidic catalyst, followed by drying and heat treatment. A method for processing a cellulosic fiber cloth, which comprises performing a rubbing treatment using a batch type dyeing machine.