JP2000054268A - Finishing of solvent spun cellulose textile fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out the dyeing and finishing with suppressed formation of fibrils and occurrence of a friction mark or a pressure mark by applying an aqueous solution containing a cellulose reactive type resin, a catalyst and a polyalkylene glycol to a solvent spun cellulose textile fabric and then heat- treating the resultant fabric. SOLUTION: An aqueous solution containing a cellulose reactive type resin, e.g. dimethylolethylene urea, a catalyst and a polyalkylene glycol, e.g. polyethylene glycol is applied to a solvent spun cellulose textile fabric and the resultant fabric is then dried at 80-150 deg.C for 0.5-30 min and further heat-treated at 145-195 deg.C for 0.5-5 min to fix the resin in an amount of 0.2-20% based on the fiber weight of the fabric and the polyalkylene glycol in an amount of 0.2-10% based on the fiber weight of the fabric thereon. The heat-treated fabric is subsequently dyed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a processing method for suppressing fibrillation of a solvent-spun cellulose fiber fabric.

[0002]

2. Description of the Related Art Solvent-spun cellulose fibers are produced by an innovative production method in which pulp as a main raw material is physically dissolved in an amine oxide solvent as a sub-raw material, and the cellulose molecules are converted into fibers without breaking the cellulose molecules as much as possible. So, compared to existing cellulosic fibers, such as cotton or rayon produced by the viscose method, it is superior in dry-wet strength and fiber shrinkage, etc., soft and comfortable, and when subjected to friction / rubbing treatment in a wet state In addition, it has the property that a single fiber splits in the fiber axis direction and becomes fibrillated.

As a processing method for suppressing fibrillation of a solvent-spun cellulose fiber, Japanese Patent Application Laid-Open No. 9-512592 and Japanese Patent Application Laid-Open No. 7-70930 use a cellulose-reactive resin such as an N-methylol compound. A method for performing a crosslinking reaction with a solvent-spun cellulose fiber is disclosed. However, in this method, the strength decreases, the texture becomes coarse and hard,
When dyeing is performed after performing the fibrillation suppression processing, there is a problem that the dyeability is reduced.

Japanese Patent Application Laid-Open No. Hei 8-13336 discloses that
A fibrillation suppressing processing method using a polyfunctional cationizing agent is disclosed. In this method, since an alkali catalyst is used to chemically react the polyfunctional cationizing agent and cellulose, if this fibrillation suppression processing is performed after dyeing, the dye is hydrolyzed by alkali and discolored. If the fibrillation suppression processing is performed before dyeing, the affinity between cellulose and the dye becomes extremely high, so that it is not possible to dye light colors, and in dark colors, uneven dyeing may occur. There is a problem that it easily occurs.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above situation, and suppresses fibril formation and the occurrence of threads and shatters during the dyeing and finishing step, and does not impair dyeing properties. An object of the present invention is to provide a method for processing a solvent-spun cellulose fiber fabric having a soft and resilient texture.

[0006]

The present invention achieves the above object and has the following construction. That is, the present invention provides a solvent-spun cellulose fiber fabric, which comprises applying an aqueous solution containing a cellulose-reactive resin, a catalyst, and a polyalkylene glycol to a solvent-spun cellulose fiber fabric, performing a heat treatment, and then performing dyeing. The gist is the processing method of the above.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The solvent-spun cellulose fiber used in the present invention is a purified cellulose fiber obtained by dissolving pulp in N-methylmorpholine-N-oxide, filtering and removing impurities, and then spinning the same. Polymerization degree, crystallinity, orientation degree are high, high strength, low elongation,
It has properties such as alkali resistance. In the present invention, a fabric such as a woven fabric, a knitted fabric, or a nonwoven fabric made of the above-described solvent-spun cellulose fiber, or a fabric mixed with the solvent-spun cellulose fiber, such as a woven fabric, a knitted fabric, or a nonwoven fabric, is used.

Other fibers to be mixed with the solvent-spun cellulose fibers include synthetic fibers such as polyester, polyamide, acrylic and polyurethane, regenerated cellulose fibers such as viscose rayon, cupra, high wet modulus rayon, polynosic, silk, wool, and the like. Examples include natural polypeptide fibers such as rabbit hair and camel hair, and natural cellulose fibers such as cotton, flax and ramie. As a mixing method, generally used methods, specifically, cotton blending, blending, twisting,
It is advisable to mix them by a method such as spinning, twisting, weaving or knitting, and the mixing ratio of these is preferably 50% or less, more preferably 30% or less.

In the present invention, an aqueous solution containing a cellulose-reactive resin, a catalyst and a polyalkylene glycol is applied to the above-mentioned solvent-spun cellulose fiber cloth. As the cellulose-reactive resin used in the present invention, there are cellulose-reactive resins such as formalin-based, N-methylol-based, glyoxal-based, sulfone-based, and epoxy-based resins, and more preferably, N-methylol-based fibrin-reactive resin. It is preferable to use, specifically, dimethylol ethylene urea, dimethylol propylene urea,
Examples include dimethylol dihydroxyethylene urea, dimethylol dimethoxyethylene urea, dimethylol uron, dimethylol triazine, and hexamethylol melamine. The cellulose-reactive resin is preferably used in the range of 0.2 to 20% with respect to the weight of the fiber. In, the dyeability decreases,
The texture becomes coarse and hard.

Examples of the catalyst used for the crosslinking reaction between the cellulose-reactive resin and cellulose include organic amine salts such as monoethanolamine hydrochloride, ammonium salts such as ammonium chloride, ammonium sulfate, and ammonium phosphate; magnesium chloride, zinc nitrate, Metal salts such as zinc fide, magnesium nitrate, zinc chloride, organic acids, sodium hydroxide,
Examples thereof include alkalis such as sodium bicarbonate and neutral salts such as sodium sulfate. The catalyst may be used singly or in combination of two or more suitable for the cellulose-reactive resin, and the amount used may be an amount corresponding to the cellulose-reactive resin used.

The polyalkylene glycol used in the present invention includes polyethylene glycol, polypropylene glycol, polybutylene glycol, and these.
Examples include block copolymers and graft copolymers using more than one kind. The polyalkylene glycol is preferably used in the range of 0.2 to 10% based on the weight of the fiber,
If the content is 0.2% or less, a sufficient effect of improving dyeability cannot be obtained,
If it is 10% or more, the dyeability will be in an equilibrium state. The mixing ratio of the cellulose-reactive resin and the polyalkylene glycol may be any ratio, but is preferably 1: 1 to 20.

In the present invention, an aqueous solution containing the above-mentioned cellulose-reactive resin, a catalyst and a polyalkylene glycol is applied to a solvent-spun cellulose fiber cloth and heat-treated. The applying method may be a commonly used method, and specific examples include a padding method, a spraying method, and a coating method. More preferably, the padding method is used. After applying the above aqueous solution to the solvent-spun cellulose fiber fabric, the solution is spun at 80 to 150 ° C. for 0.5 to 3 hours.
And then heat-treat at 145 to 190 ° C. for 0.5 to 5 minutes.

Next, in the present invention, dyeing is performed. As the dyeing method, a generally used method may be used, and specific examples thereof include continuous dyeing and exhaustion dyeing. Either method may be used for dyeing, but the surface appearance is clear. When it is desired to obtain a soft cloth, a continuous dyeing method with less threading or attrition is used, and when it is desired to obtain a cloth having a soft and resilient texture, an exhaustion dyeing method that produces a fir effect may be used. In order to obtain a softer texture, enzyme treatment, alkali treatment, kneading, and the like may be performed before dyeing. The present invention has the above configuration.

[0014]

According to the present invention, an aqueous solution containing a cellulose-reactive resin, a catalyst, and a polyalkylene glycol is applied to a solvent-spun cellulose fiber cloth and subjected to a heat treatment, thereby suppressing the generation of fibrils and the occurrence of threads and attrition. Is it possible to obtain a solvent-spun cellulose fiber fabric having a soft and resilient texture without impairing the dyeing properties,
The reason is not clear, but the inventors speculate as follows. When a cross-linking reaction with cellulose molecules is performed in an aqueous solution of a cellulose-reaction resin containing a polyalkylene glycol, the polyalkylene glycol cross-links with the cellulose molecules via the cellulose-reaction resin. The length becomes longer, and more amorphous regions are retained. Since the cellulose-reactive resin and the cellulose molecules are cross-linked in a state where the cross-linking length is long as described above, the progress of fibrillation during the dyeing process is suppressed, and the anti-wrinkling property when wet is improved, thereby dyeing. The generation of threads and shatters during the process is suppressed, and there are many amorphous regions, so that the infiltration of dye molecules is facilitated and the dyeability is improved.

[0015]

EXAMPLES Next, the present invention will be described more specifically with reference to examples. The measurement and evaluation of samples in the examples were performed by the following methods. Fibrillation degree The fibrillation degree of the fabric was evaluated visually by the following three grades. ：: No fibrils were generated. Δ: Little fibrils were generated. X: Many fibrils were generated. Defects The occurrence of spots, threads, and atari were visually determined.
Evaluation was made in the following three stages. ：: good △: some defects occurred ×: defects occurred Dyeability The dyeability of the fabric was measured using the following Kubelka-Munk method.
Evaluation was made based on the K / S value at a reflectance (R) of 600 nm. K / S = (1−R) ² / 2R Texture The texture of the fabric was relatively evaluated in the following two stages by a sensory test by touch. ○: Soft and excellent resilience ×: Lack of softness and resilience

Example 1 Solvent-spun cellulose fiber (Lyocell, manufactured by Lenting Co.)
100% twill fabric with 30th single yarn (warp density 120
And a weft density of 80 yarns / inch) were prepared and desizing was performed by a usual method. The woven fabric was immersed in an aqueous solution of the following formulation 1 and squeezed with a mangle at a squeezing rate of 100%.
After drying at 1 ° C. for 1 minute, heat treatment was performed at 160 ° C. for 3 minutes. Formulation 1 Sumitex Resin NS-19 20g / L (Glyoxal-based fibrous reactive resin manufactured by Sumitomo Chemical Co., Ltd.) Sumitex Accelerator X-80 6g / L (Metal salt-based catalyst manufactured by Sumitomo Chemical Co., Ltd.) Polyethylene glycol # 400 30 g / l (industrial, average molecular weight 400) Next, using a pot dyeing machine, using a dyeing solution of the following formulation 2 at a bath ratio of 1:30 at 95 ° C. for 30 minutes, washing with water and drying. Thus, a processed fabric according to the present invention was obtained. Formula 2 Kayasusupura Blue FGL 3% owf (Nippon Kayaku Co., Ltd., direct dye) Anhydrous sodium sulfate 20% owf

For comparison with the present invention, the same sample as in Example 1 was used, and exactly the same method as in Example 1 was used except that polyethylene glycol in Formulation 1 was omitted.
To obtain a processed fabric. For comparison with the present invention, using the sample which had just been subjected to desizing and scouring of Example 1, dyeing was carried out in exactly the same manner as in Example 1 to obtain an untreated fabric of Comparative Example 2. Table 1 shows the evaluation results of the present invention and the comparative woven fabric.

[0018]

[Table 1]

As is evident from Table 1, the processed fabric according to the present invention suppressed fibrils generated during the dyeing and finishing step, did not generate threads or shatters, and had good dyeing properties and texture. On the other hand, in the processed fabric of Comparative Example 1, the fibrils generated during the dyeing and finishing step are suppressed, but the dyeability is reduced and the texture is hardened. The untreated fabric of Comparative Example 2 has a large amount of fibrils and a large number of threads and attrition.

[0020]

According to the method of the present invention, a solvent-spun cellulose fiber having a soft and resilient texture that suppresses fibril formation and the occurrence of threads and shatters during the dyeing and finishing step, and does not impair dyeing properties. A fabric can be obtained.

Claims (1)

[Claims] 1. A solvent-spun cellulose fiber fabric, comprising applying an aqueous solution containing a cellulose-reactive resin, a catalyst and a polyalkylene glycol to a solvent-spun cellulose fiber fabric, performing a heat treatment, and then dyeing the solution. Processing method.