JPH11131374A - Water-repellent finishing of fabric containing solvent-spun cellulosic fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart water-repellent performance with good washing durability to fabric by treating a solvent-spun cellulosic fiber-containing fabric with a cellulosic crosslinking resin and subjecting the fabric to water-repellent finishing by using both of a water repellent and a crosslinking agent. SOLUTION: A cellulose crosslinked resin such as glyoxal-based resin in an amount of 0.5-20 wt.% based on fiber weight is applied to solvent spinning method-based cellulosic fiber-containing fabric and crosslinking reaction treatment is applied to the fabric and then, an organic fluorine-based water repellent in an amount of 2-20 wt.% based on fiber weight and a blocked isocyanate-based crosslinking agent in an amount of 0.5-3 wt.% based on fiber weight are applied to fiber so that a weight ratio of the water repellent to the crosslinking agent used is (4:1) to (6:1) and the treated fabric is dried at 80-160 deg.C and then, subjected to heat treatment at 130-220 deg.C which is not lower than crosslinking reaction temperature for 0.5-5 min.

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 washing-resistant water repellency to a solvent-spun cellulose fiber-containing fabric.

[0002]

2. Description of the Related Art Conventionally, as a processing method for imparting durable water repellency to a cellulosic fiber-containing fabric, a method in which a crosslinking agent is used in combination with a water repellent has been used. However, when this method is used for a solvent-spun cellulose fiber-containing fabric, there is a problem that although the initial water repellency is good, a durable water repellency cannot be obtained.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and provides a processing method capable of imparting washing-durable water-repellent performance to a solvent-spun cellulose fiber-containing fabric. It is intended to provide.

[0004]

The present invention attains the above object and has the following constitution. That is, the present invention provides a solvent-spun cellulose fiber-containing cloth, which comprises subjecting a solvent-spun cellulose fiber-containing cloth to a cross-linking reaction treatment with a cellulose cross-linking resin, and then performing a water-repellent treatment using a water-repellent agent in combination with a cross-linking agent. The water repellent processing method of the above is a gist.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
In the present invention, a solvent-spun cellulose fiber-containing fabric is used as a fabric to be processed. Solvent-spun cellulose fibers are regenerated cellulose fibers obtained by dissolving pulp in N-methylmorpholine-N-oxide, filtering to remove impurities, and then spinning the fibers. It has high degree of polymerization, crystallinity and orientation, high strength, low elongation, and alkali resistance. Fabrics such as woven, knitted and non-woven fabrics containing such solvent-spun cellulose fibers are used in the present invention. The content of solvent-spun cellulose fibers may, of course, be 100%. Other fibers when mixed with solvent-spun cellulose fibers include:
Natural cellulose fibers such as cotton and hemp; regenerated cellulose fibers such as rayon, cupra, polynosic, and high wet modulus rayon; natural fibers such as wool and silk; and synthetic fibers such as nylon, polyester, and acrylic. Is mixed by means such as blending, twisting, weaving and knitting.

In the present invention, first, the above-mentioned cloth is subjected to a crosslinking reaction treatment with a cellulose crosslinking resin. Examples of the cellulose cross-linking resin used herein include urea formalin resin, ethylene urea resin, melamine resin, aminoplast resin having a methylol group such as glyoxal resin, diglycidyl ether of glycol, polyglycidyl ether of polyol, and diglycidyl of dicarboxylic acid. An epoxy resin having a glycidyl group such as an ester (an ethylene oxide-containing epoxy resin having a small content) can be used. The amount of the cellulose cross-linked resin used is preferably in the range of 0.5 to 20% by weight based on the weight of the fiber.

In order to apply the cellulose crosslinked resin to the solvent-spun cellulose fiber-containing fabric, any method such as an impregnation method or a spraying method may be used. Good to adopt. Drying is performed in the range of 80 to 160 ° C. After applying the cellulose cross-linking resin solution and drying, heat treatment is performed for 130 minutes.
By performing the reaction at a temperature of about 200 ° C. for about 0.5 to 5 minutes, the crosslinking reaction of the cellulose crosslinking resin is completed.

Next, in the present invention, a water-repellent treatment is performed on the solvent-spun cellulose fiber-containing fabric by using a crosslinking agent in combination with the water-repellent agent. As the water repellent used for the water repellent treatment, all conventionally known ones such as an organic fluorine-based water repellent, a silicon-based water repellent, and a wax-based water repellent can be used. As the organic fluorine-based water repellent, for example, a perfluoroalkyl acrylate-based water repellent can be used.
An emulsion of dimethylpolysiloxane can be used. As a cross-linking agent used in combination therewith, a blocked isocyanate resin, a melamine resin, or the like can be used. The amount of water repellent used is 2 to 20% by weight based on the fiber weight, and the amount of cross-linking agent used is 0.5 to 3% based on the fiber weight. The ratio of the combined use is preferably in the range of 4: 1 to 6: 1.

The water repellent treatment liquid may be applied to the fabric by any method such as an impregnation method or a spray method, but usually, a method of applying the water repellent treatment liquid by controlling the amount of adhesion with a padder and drying is adopted. Good to do. The drying process is 80
Perform in the range of １６０160 ° C. After applying and drying the water repellent treatment liquid, the cloth is subjected to a heat treatment at a temperature not lower than the reaction temperature of the crosslinking agent. The heat treatment is usually performed at 130 to 220 ° C. for 0.5 to 5 minutes. The present invention has the above configuration.

[0010]

The solvent-spun cellulose fiber-containing fabric has a particularly high affinity for water. Therefore, the conventional method in which a crosslinking agent is used in combination with a water-repellent agent causes the water-repellent agent to drop off during washing, resulting in poor washing durability. However, as in the present invention, when a solvent-spun cellulose fiber-containing fabric is subjected to a cross-linking reaction treatment with a cellulose cross-linking resin, the affinity between the fiber and water is suppressed, and in such a state, the cross-linking with the water repellent is carried out. When a water repellent treatment is performed in combination with a water repellent, the water repellency imparted and the hydrophilicity suppressing effect of the previous step are combined, so that water infiltrates into the fiber is reduced, and as a result, the water repellent is less likely to fall off and the water repellent is reduced. It is considered that the washing durability of the water performance is improved.

[0011]

EXAMPLES Next, the present invention will be described more specifically with reference to examples. The measurement and evaluation of the performance of the fabric in the examples were performed by the following methods. (1) Water repellency Sample after finishing and home washing method [JIS L-021
7 (103 method)]
It was measured according to JIS L-1096 (spray method).

Example 1 A woven fabric made of 100% solvent-spun cellulose fiber (Lyocell) (broad and basis weight 180 using both warp and weft yarns: 180)
g / m ² ), and scouring, bleaching and dyeing were carried out in the usual manner. Next, it is immersed in a processing solution of the following prescription 1 using a padder, padded with a pickup 80%,
It was dried and heat-treated at 150 ° C. for 3 minutes. Formulation 1 Sumitex Resin NS-19 10% by weight (Sumitomo Chemical Co., Ltd., glyoxal derivative) Sumitex Accelerator X110 3% by weight (Sumitomo Chemical Co., Ltd., special metal salt catalyst)

Subsequently, the film is dipped in a processing solution of the following formula 2 using a padder, padded with a 65% pickup, dried, and heat-treated at 170 ° C. for 1.5 minutes to obtain a water-repellent finish of the present invention. A fabric was obtained. Formulation 2 Asahigard AG-480 10% by weight (manufactured by Meisei Chemical Industry Co., Ltd., organic fluorine-based water repellent) Meikanate MF 2% by weight (manufactured by Meisei Chemical Industry Co., Ltd., block isocyanate-based cross-linking agent) RIKEN SOFFNER FGS-81 % By weight (Miki Riken Kogyo Co., Ltd., silicon-based feel modifier)

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 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.

[0015]

[Table 1]

As is clear from Table 1, the fabric processed by the method of the present invention had washing-resistant water repellency.

Example 2 A woven fabric made of 100% solvent-spun cellulose fiber (Lyocell) (broad warp and weft both use a 40th-count broad cloth and a basis weight of 150)
g / m ² ), and scouring, bleaching and dyeing were carried out in the usual manner. Next, it is immersed in a processing solution of the following prescription 3 using a padder, and padded with a pickup 80%.
It was dried and heat-treated at 150 ° C. for 3 minutes. Formulation 3 Denacol EX-152 6% by weight (Epoxy compound, manufactured by Nagase Kasei Co., Ltd.) 45% aqueous solution of zinc borofluoride (reagent) 1% by weight

Subsequently, the pad is immersed in a treatment liquid having the following formulation 4 using a padder, padded with a pickup 70%, dried, and heat-treated at 170 ° C. for 1.5 minutes to obtain a water-repellent finish of the present invention. A fabric was obtained. Formulation 4 Polon MK-206 4% by weight (Shin-Etsu Chemical Co., Ltd., emulsion silicone water repellent) Cat. FZ 2% by weight (Shin-Etsu Chemical, organic metal salt aqueous solution)

For 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 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.

[0020]

[Table 2]

As is clear from Table 2, the processed fabric according to the method of the present invention had washing-resistant water repellency.

[0022]

According to the present invention, washing-durable water-repellent performance can be imparted to a solvent-spun cellulose fiber-containing fabric.

Claims (1)

[Claims] 1. A solvent-spun cellulose fiber-containing cloth, which is subjected to a crosslinking reaction treatment with a cellulose cross-linking resin, and then subjected to a water-repellent treatment by using a crosslinking agent in combination with a water-repellent agent. Water repellent processing method.