JPH10195765A - Method for processing cloth made of regenerated cellulose fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To process a regenerated cellulose fiber-made cloth to prevent fibrillation and enable the obtaining of vivid color tone during dying by treating a regenerated cellulose fiber-made cloth with a compound having glycidyl groups and subsequently dying the treated cloth. SOLUTION: A cloth made of regenerated cellulose fiber such as RIYOSERU is treated with a compound (the use is preferably 0.5-20wt.% based on the weight of the fiber) such as ethylene glycol diglycidyl ether or polyglycerol polyglycidyl ether having glycidyl groups in advance and subsequently dying it to process a cellulose regenerated fiber-made cloth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method capable of preventing fibrillation of a cellulosic regenerated fiber fabric and imparting a clear hue at the time of dyeing.

[0002]

2. Description of the Related Art Conventionally, as means for preventing fibrillation of regenerated cellulose fibers, after dyeing, cross-linking is carried out with an aminoplast resin having a methylol group such as a urea formalin resin, an ethylene urea resin, a melamine resin or a glyoxal resin. Methods are known. However, treatment with these aminoplast resins is limited to treatment after dyeing, and if crosslinking with this aminoplast resin is performed before dyeing, the dyeing properties are greatly impaired during dyeing and work as an anti-staining effect. Dyeing becomes difficult. It is known that the cellulosic regenerated fibers which are the object of the present invention undergo threading and fibrillation when subjected to a frictional action in a swollen state, and the fibrillation is carried out using a liquid flow dyeing machine or the like. It occurs frequently in the dyeing process. According to such circumstances, the above-mentioned treatment with aminoplast resin can be performed only after dyeing. Therefore, even if it is possible to suppress the progress of fibrillation at the time of washing the final product of the consumer, fibrils and threads in the dyeing process at the fabric stage. However, it was difficult to obtain a clean cloth surface.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and provides a processing method capable of dyeing a cellulosic regenerated fiber fabric into a clear hue without fibrillation. The purpose is to obtain.

[0004]

The present invention attains the above object and has the following constitution. That is, the gist of the present invention is a method for processing a cellulosic regenerated fiber cloth, which comprises treating a cellulosic regenerated fiber cloth with a compound having a glycidyl group in advance, and then dyeing the cellulosic regenerated fiber cloth.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The cellulosic regenerated fiber cloth used in the present invention is a woven fabric, a knitted fabric, a nonwoven fabric or a fiber made of a single fiber of regenerated cellulose fiber such as rayon, cupra, polynosic, HWM (high wet modulus rayon), lyocell, or other natural fibers. And woven or knitted fabrics such as mixed spinning, cross weaving, and cross knitting. In the present invention, first, a treatment liquid containing a compound having a glycidyl group is applied to the above-mentioned fiber cloth.

The compound having a glycidyl group used herein includes diglycidyl ether of glycol, di- and polyglycidyl ether of polyol, diglycidyl ester of dicarboxylic acid, and the like. These treatment agents may be used alone or in any combination. However, it should be noted that the effect of inhibiting fibrillation and the degree of deep dyeing differ depending on the type of compound having a glycidyl group. . The amount of the drug used is suitably in the range of 0.5 to 20% by weight based on the weight of the fiber, and the used amount is determined according to the required degree of suppression of fibrillation and hue. If the amount of the compound having a glycidyl group is smaller than this, the effect of suppressing fibrillation and deep dyeing may not easily occur.

[0007] As a method of applying, a known applying method may be used, but a padding method is preferable for practical use.
After applying the treating agent, drying and heat treatment are performed. Drying is 80-1
The heat treatment is performed at 60 ° C and the heat treatment is performed at 110 to 220 ° C for 0.5 to 5 minutes.

Thereafter, in the present invention, dyeing is performed. When dyeing, use direct dyes, basic dyes, reactive dyes, etc.
Dye to desired density and hue. The present invention has the above configuration.

[0009]

It is not always clear why the treatment of the cellulosic regenerated fiber fabric with a compound having a glycidyl group prevents fibrillation and deep dyeing of the fiber as in the present invention. Have speculated as follows. It is considered that when a compound having a glycidyl group is added to the cellulosic regenerated fiber fabric, the amorphous region of the cellulose molecule is cross-linked, thereby suppressing fibrillation due to friction in a swollen state. Further, these compounds having a glycidyl group have a relatively long chain,
The ethylene glycol chain is the main component of the skeleton, and has a very high affinity for water. Therefore, the amorphous region of the cellulose microstructure is expanded when wet, and the amount of dye molecules adsorbed is greatly increased. It is presumed that the coloring property is improved and clear staining is possible.

[0010]

EXAMPLES Next, the present invention will be described in more detail with reference to examples. Measurement and evaluation of the performance of the fabric in the examples were performed by the following methods.

(1) Evaluation of fibrillation Since there is no standardized test method for fibrillation, the degree of fibrillation was evaluated by the following method. First,
In order to prepare a model for evaluating fibrillation, the test fabric was dyed and soaped under mild conditions so as not to roughen the fabric surface, and finished to a clear appearance. This was sampled in a size of 40 cm × 40 cm, and two pieces were overlapped on the outer surface and sewn on four sides to obtain a test piece, which was washed at home, tumble dried, unwashed, and washed according to JIS L-0217, 103 method. Washing, 3 washing, 9 washing, and 27 washing models were prepared, and each model was a 5-grade (best) to 1st (worst) model. The fabric according to the example was subjected to desired treatment, dyeing, and soaping according to the example, dried, and evaluated as a sample after dyeing in comparison with the above model. Further, in order to investigate the washing durability, a test piece similar to the fibrillation evaluation model was prepared, and a sample after washing and drying 20 times of home washing according to the 103 method was evaluated by comparison with the model.

(2) Staining density Using a spectrophotometer, the reflectance at a wavelength of 400 to 700 nm is measured, and the reflectance at the maximum absorption wavelength is determined.
Calculate the staining concentration (K / S) using the lka-Munk equation, and display the average value to one decimal place. K / S = (1−R) ² / 2R (where R is the reflectance (%) at the maximum absorption wavelength)

EXAMPLE 1 A scoured woven fabric (warp density: 135 yarns / inch, weft density: 80 yarns / inch, basis weight: 150 g / m ² ) using a 40% single yarn of 100% rayon woolen yarn was prepared as a fabric to be processed. After applying a processing solution represented by the following formula 1 by a padding method with a pickup of 70%, it was dried at 100 ° C. for 120 seconds, and subsequently heat-treated at 170 ° C. for 90 seconds.

Formula 1 45% aqueous zinc borofluoride 1% ethylene glycol diglycidyl ether 6%

[0015]

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Next, using a liquid flow dyeing machine, the following formulation 2
After staining at 55 ° C. for 60 minutes, neutralization was performed, followed by 100 g of a nonionic surfactant at 1 g / liter.
Soaping was performed at 10 ° C. for 10 minutes.

Prescription 2 Remazole Black DEN liq. 6% owf (reactive dye, manufactured by Daistar Japan KK) Anhydrous sodium sulfate 50 g / l Sodium carbonate 15 g / l

For comparison with the present invention, a work cloth for comparison (Comparative Example 1) was obtained in exactly the same manner as in this example, except that the treatment according to Formulation 1 was omitted in this example. The performances of the present invention and the work cloth for comparison were measured and evaluated, and the results are shown in Table 1.

[0019]

[Table 1]

As is clear from Table 1, the fabric treated according to the method of the present invention has almost no fibrillation phenomenon, good fibrillation evaluation, and good washing durability. In addition, the staining concentration (K /
S) had also improved.

Example 2 A scoured woven fabric (warp density: 140 yarns / inch, using a 40% single yarn of solvent-spun cellulose (Lyocell) 100% swoof yarn instead of the rayon swoof fabric used in the first embodiment)
A weft density of 80 yarns / inch, a basis weight of 180 g / m ² ) was used as a fabric to be processed, and the following formulation 3 was used in place of the formulation 1.
A processed fabric of the present invention was obtained in exactly the same manner as in Example 1.

Formula 3 45% aqueous solution of zinc borofluoride 1% Polyglycerol polyglycidyl ether 8%

[0023]

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For the purpose of comparison with the present invention, a work cloth for comparison (Comparative Example 2) was obtained in exactly the same manner as in this example except that the treatment according to Formulation 3 was omitted in this example. The performances of the present invention and the work cloth for comparison were measured and evaluated, and the results are shown in Table 2.

[0025]

[Table 2]

As is clear from Table 2, although the lyocell was originally very easy to fibrillate, the processed fabric of the present invention had a very high fibrillation evaluation, and the dyeing density was higher than that of Comparative Example 2. It was greatly improved. In Comparative Example 2 which is a normal lyocell, the surface of the fabric was easily roughened due to fibrillation, and a large difference was observed from the lyocell treated with the present invention.

[0027]

According to the method of the present invention, a vivid hue can be obtained during dyeing while preventing fibrillation of the cellulosic regenerated fiber fabric.

Claims (1)

[Claims] 1. A method for processing a cellulosic regenerated fiber cloth, which comprises treating a cellulosic regenerated fiber cloth with a compound having a glycidyl group in advance, and then dyeing the cellulosic regenerated fiber cloth.