JPH07216745A - Agent for preventing adhesion of dye and method for treating previously dyed fiber or fiber product using the same agent - Google Patents

Abstract

PURPOSE:To carry out treatment capable of preventing pollution of a white area and re-attachment of removed dye by including a specific colloid in a cleansing bath in carrying out decoloring treatment of dyed fiber or fiber product. CONSTITUTION:In carrying out decoloring treatment of previously dyed fiber or fiber product, e.g. colloid obtained by coating, e.g. the surface of cellulose colloid with a hydrophilic polymer and neutral cellulase are added to a cleansing bath to carry out decoloring treatment capable of preventing re-attachment of dye without causing pollution of white area. Furthermore, the treatment does not affect on an enzyme such as cellulase.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a fiber or a fiber product of a dye which has been dropped (preceding the case where the dye remains attached to the fiber) when treating the fiber or the fiber product which is dyed in advance. The present invention relates to a dye anti-adhesive agent for preventing the adherence of a dye and a method for treating a fiber or a textile product previously dyed with the dye anti-adhesive agent.

[0002]

BACKGROUND OF THE INVENTION Problems to be Solved by the Invention The desizing of a mixed woven fabric of dyed yarn and white yarn, such as denim fabric,
The following phenomena occur when a treatment such as weight reduction processing with an enzyme is performed. When the desizing treatment is performed, the dropped dye adheres to the white thread and causes white field contamination. In addition, when the weight reduction processing with an enzyme is performed, the dropped dye adheres to the white thread and causes white field contamination,
Moreover, it adheres to the white spot of the decolorized yarn-dyed yarn and significantly deteriorates its quality. Not only indigo denim but also textile products dyed with other dyes are washed with pumice stone, enzyme, etc. using a washer to give a feeling of being washed and worn out. However, the quality is deteriorated.

Although many substances have been developed in the past for the purpose of preventing white field contamination and dye adhesion, they have not solved the above problems. For example, CMC (carboxymethylcellulose) soda, poval, polyvinylpyrrolidone, etc. have been known as substances known from old times. In the patents applied in the past, calcium chloride (Japanese Patent Laid-Open No.
-330), sodium polyacrylate (JP-A-48-64)
283), nonionic surfactants (JP-A-50-187).
86), a mixture of β-naphthol and ethylene oxide (JP-A-55-22081), α-olein sulfonate (JP-A-56-53274), and a water-soluble polymer in which part or all of the carboxyl groups are salts ( JP-A-56-630
81), a copolymer of maleic anhydride with isoamylene and / or amylene (JP-A-58-41981), specific organosilanes and organosiloxanes (JP-A-58-7).
0774), a specific aromatic sulfonic acid condensate and an oil agent (JP-A-60-45676), a water-soluble copolymer containing unsaturated carboxylic acids, and a specific polycyclic aromatic compound sulfonated formalin condensate ( Japanese Patent Laid-Open No. 61-21576
9), a vinyl polymer having a pyrrolidone skeleton or a copolymer of vinylpyrrolidone and another monomer (Japanese Patent Publication No. 5-613).
95), specific diquaternary ammonium salts and mono-, poly-
Quaternary or specific polymer-ammonium salt or non-quaternized basic nitrogen-containing polycondensate (JP-A-62-1178)
87), an organic sulfonic acid and / or a salt thereof (Japanese Patent Laid-open No. Sho 6-66
3-135581), active ingredients for synthetic detergents, vinylpyrrolidone polymers and nonionic cellulose ethers (Japanese Patent Application Laid-Open No. 6-58242).
3-37200), a fairly insoluble capture agent (Sho 63
-502761), cationized cellulose (JP-A-1-
2015588), graft polymers based on polyalkylene oxide (JP-A-63-260994), water-soluble salts of polymerized fatty acids (JP-A-1-272888), specific water-soluble polymers (JP-A-1-185398) and the like. Are known. Further, a method of preventing by controlling treatment conditions, a method of processing the fiber surface to reduce the adhesion of dyes and stains, and the like have been developed.

However, among these prior findings, the use of agents such as surfactants has an effect on the environment such as water pollution. Alternatively, the dropped mixture of dye and surfactant may reattach to the fiber. The invention using cationized cellulose (Japanese Patent Laid-Open No. 01-201588) is intended to solve the problem, but it is necessary to cationize cellulose at a ratio of 100 to 3000 meq / Kg · fiber. Yes, the cost rises. In addition, the target dye is anionic,
Even in the case of disperse dyes, it is necessary to anionize with an anionic dispersant. Further, the biggest problem is that when an enzyme is present in the washing solution, the enzyme itself becomes an anion under general washing conditions, so that it is electrically adsorbed on the cationized cellulose and the effect is reduced.

On the other hand, an attempt has been made to use an insoluble scavenger for dyes and / or fat stains, although it is subject to cleaning under the application of ultrasonic waves (Japanese Patent Publication No. 63-50276).
1). This is also characterized in that it is subjected to a cationization treatment with a polyquaternary ammonium compound or the like, and has the same kind of drawbacks as the above cationized cellulose. In addition, there is an example in which nonionic cellulose ether is used in combination with other chemicals to find the effect (JP-A-63-37200), but the portion of cellulose ether itself represented by carboxymethyl cellulose is already known, and the ether is known. It has the same drawbacks as the above-mentioned cationized cellulose in that it has to be converted.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a dye adhesion preventive agent for treating a pre-dyed fiber or textile product, which is characterized by containing a colloid, and a pre-dyed fiber or textile product. The present invention relates to a method for treating a pre-dyed fiber or fiber product, which comprises using the dye adhesion preventing agent during treatment.

In recent years, many enzyme agents have come to be used for textile processing and textile washing. Therefore, it is necessary that the additives during the treatment / washing have little influence on the enzyme such as a decrease in activity. The "dye adhesion preventing agent" of the present invention is characterized by containing a colloid. The origin of colloid is
It may be an organic substance such as cellulose or protein or an inorganic substance. Here, the colloid means a “dispersed system or dispersed phase in which a substance is dispersed as particles larger than an atom or a low molecule” (“Rikagaku Dictionary” by Iwanami Shoten). When the particles are in a dispersed state by the addition of a hydrophilic polymer or the like, they can be used as a colloid regardless of the above definition.

The present invention will be described in detail below. The pre-dyed fiber or fiber product in the present invention,
Cellulosic fibers or fiber products such as cotton, hemp, rayon, and TENCEL (Courtles), which are blended, knitted,
It can also be applied to mixed woven products and mixed spinning with other fibers, mixed knitting, and woven products. Dyes are direct dyes, reactive dyes, acid dyes, mordants.
Acid mordant dye, vat dye, sulfur dye, azoic dye,
A dyed fiber or fiber product which has a pigment or the like is a dyed by a conventional method with these dyes.

[0009] The treatment means desizing or weight reduction, but the present invention can also be applied during the processing such as refining and reforming. It is known that enzymes such as cellulase, amylase, protease, lipase and pectinase are used for these treatments (Dyeing Industry Vol.38, No.
8, P47). When the fibers or textiles dyed with the above-mentioned dyes are treated as described above, the fallen dyes contaminate the surface of the fibers (white field contamination), resulting in a significant deterioration in quality. For example, in the case of blue jeans, which is a woven product of dyed yarn and undyed yarn (white yarn), the white yarn is contaminated with blue (white spot contamination).
This gives the impression that the overall color tone is blurred. Further, the portion that should be originally white, such as a pocket, is colored and the quality deteriorates. Alternatively, even if the contamination of the white background is not a problem, the adherence of the dropped dye causes the apparent decolorization efficiency to decrease.

The present invention solves such a problem, and by allowing a colloid to coexist during the treatment,
It can prevent and reduce the adhesion of dye. Among the colloids used in the present invention, cellulose may partially contain hemicellulose such as xylan or lignin. When a colloid derived from cellulose is used, it is important to lower the molecular weight of cellulose in order to enhance the dispersibility. As a method of lowering the molecular weight, a method of forming a colloid by a physical crushing method, a chemical decomposition method, a biological decomposition method, or the like is known. When the colloid is a protein, the protein is not limited by the molecular weight and the like, and sugar chains and the like may be attached. Also in this case, the method of forming the colloid is not particularly limited, and it may be used near the isoelectric point or partially modified with heat or urea. As the inorganic colloid, silicate, calcium carbonate, titanium oxide or the like can be used, and the preparation method includes physical methods, chemical methods, etc., and is not particularly limited.

There are no restrictions on the additives used when the dye anti-adhesion agent of the present invention is used, but when an enzyme such as cellulase is used during the treatment, there is no adverse effect such as inactivation of the enzyme. Therefore, the features of the present invention are remarkable. The addition amount of the dye adhesion inhibitor is determined by the bath ratio (the weight ratio of the fiber and the cleaning liquid), the treatment temperature (usually 40 to 80 ° C.), the treatment method and the like.
Considering economic efficiency, the amount added should naturally be kept to a minimum within the range where the effect is sufficiently recognized. The addition amount is
It can be decreased when the bath ratio is increased. The amount of addition can also be reduced by increasing the dispersibility by adding a hydrophilic polymer or the like. In this case, the colloid and the hydrophilic polymer may be chemically bound or may be only a physical interaction. For example, C
Methods for attaching hydrophilic polymers such as MC and carrageenan to the surface are known, and these methods are also applicable to all colloids of the present invention. As an example, colloidal Avicel (Asahi Kasei) can be used. This substance is a substance in which the surface of cellulose colloid is coated with a hydrophilic polymer. Furthermore, CMC having a low degree of etherification can also be used directly.

The protein-derived dye anti-adhesive agent is conveniently used as a colloidalization method by using it at a pH near the isoelectric point or by partially denaturing it by a physicochemical method. The origin of the protein is not particularly limited, but for example, the protein obtained by extracting soybean with hot water may be used at a pH of about 5 to 6. Alternatively, a molecular colloid in which a hydrophobic group is introduced into a part of the water-soluble peptide is also suitable for this purpose. For example, by introducing a hydrophobic group such as a benzyl group into a part of the polyglutamic acid polymer, it can be used as a dye adhesion inhibitor in a small amount.

Regarding the method of using the dye adhesion preventive agent, the colloid of the present invention may be added at the time of ordinary treatment, but when the effect is improved by using several kinds of colloids in combination depending on the use temperature, pH, kind of additives and the like. There is also. The dye adhesion preventive agent of the present invention can be used in combination with other agents such as a surfactant, a builder, an enzyme and an antiseptic agent. Further, the fact that there is little adverse effect on the environment is also a major feature of the product of the present invention.

[0014]

EXAMPLES The present invention will be specifically described below with reference to examples. Example 1 The desized blue jeans fabric was subjected to a decolorizing treatment under the following conditions. Decolorization conditions Tester: 8 liter small washing machine Bath ratio: 1: 100 Heating: 55 ° C Time: 60 minutes

The treatment was carried out by adding 50 g of neutral cellulase as an avicelase and 0.6 g of a dye adhesion inhibitor (shown in Table 1) per liter of the treatment bath. After treatment,
It was washed with water and dried. As a result, as shown in Table 1, the effect of preventing contamination was recognized, and the decolorizing effect was not reduced. In addition, decolorization is L on the outer material of blue jeans fabric.
The value (light source is D-65; brightness and brightness are shown, and the closer to 100, the whiter is white). Contamination is the WB value of the cotton knit added at the time of treatment (light source is C / 2; Hunter whiteness and whiteness are shown. ) Was measured by the Lab color system, and the difference from untreated was described.

[0016]

[Table 1] Table 1 Effect of anti-dye agent ─────────────────────────────────── Additive decolorization (ΔL) Contamination (ΔWB) ────────────────────────────────── Additive-free Good 1.36 Yes-6.09 Colloidal Avicel Good 1.35 None 1.63 Soy protein colloid Good 1.50 None 0.01 CMC (etherification degree 0.2) Good 1.32 None 1.48 Cottonseed good 1.48 None 0.12 Polyglutamic acid * Good 1.36 None -0.55 CaCO ₃ colloid Good 1.37 None -0.94 ─── ─────────────────────────────── * Benzyl esterification degree 50%

Example 2 Desized blue jeans pants were decolorized under the following conditions. Decolorization condition Tester: 40kg Washer Bath ratio: 1: 7 Heating: 55 ° C Time: 60 minutes

Treatment was carried out by adding 0.6 g of 50 units of neutral cellulase as an avicelase and a dye adhesion inhibitor per liter of the treatment bath. After the treatment, water washing, sodium hypochlorite treatment, water washing, hypo treatment, water washing and drying were performed. Decolorization and stain were measured according to Example 1. As a result, as shown in Table 2, the anti-pollution effect was recognized,
Moreover, the decolorizing effect was not reduced.

[0019]

[Table 2] Table 2 Effect of anti-dye agent ─────────────────────────────── Additive Decolorization (ΔL) Contamination (ΔWB) ─────────────────────────────── Additive Good 3.8 Yes -8.05 Colloidal Avicel Good 3.9 None 0.26 Soy protein Colloid Good 4.1 None 0.21 ────────────────────────────────

Example 3 The same treatment as in Example 1 was carried out using acid cellulase. However, the amount of enzyme added was 500 units per liter. In addition, colloidal Avicel was added as a dye adhesion preventing agent at 0.6 g / liter. As a result, the adhesion of the dye was significantly prevented as compared with the case of no addition. The degree of decolorization was the same.

Example 4 0.2 to 0.6 g of colloidal Avicel was added to neutral cellulase per 50 units of the enzyme and granulated. As a result of performing the same treatment as in Example 1, 0.4 g was added to Example 1.
The effect equivalent to the described 0.6 g addition section was obtained.

Example 5 Tencel (Courtles) jumpers and pants (both indigo dyed and desizing processed) were treated with acid cellulase (100 units / l). The processing conditions are as follows. Tester: 40kg Washer Bath ratio: 1:20 Heating: 55 ° C Time: 60 minutes Ball: Powerball L 200% (Rakuto Kasei Co., Ltd.) Special ball S 200% (same as above) Is a rubber ball)

As a result, the weight loss was 4.7% and the adhesion of the dye was strong with the enzyme alone, whereas the weight loss was 4.3 in the group to which 0.6 g / l of CMC having an etherification degree of 0.2 was added. %
No dye adhesion was observed. In addition, in the group in which 0.6 g / liter of colloidal Avicel was added, the weight loss was 4.6%, and the adhesion of the dye was not recognized.

Example 6 Treatment was carried out under the same conditions as in Example 5 without adding cellulase. As a result, the adhesion of the dye was strong at the weight loss rate of 1.2%, whereas the dye adhesion was not observed at the weight loss rate of 1.2% in the group in which 0.6 g / liter of colloidal Avicel was added.

[0025]

Industrial Applicability According to the present invention, it becomes possible to easily and efficiently prevent the adhesion of dye during the treatment of pre-dyed fibers or textiles. In particular, when an enzyme is used during the treatment, it is characterized in that the adverse effect on the enzyme is small.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Otsuka 4-5-1 Kanzu, Otsu City, Shiga Prefecture Rakuto Kasei Kogyo Co., Ltd.

Claims (7)

[Claims] 1. A colloid is contained,
A dye adhesion preventive agent for treating pre-dyed fibers or textile products. 2. The dye adhesion preventing agent according to claim 1, wherein the colloid is derived from cellulose or protein. 3. The dye adhesion preventing agent according to claim 1, wherein a hydrophilic polymer is attached to the surface of the colloid. 4. The dye adhesion preventive agent according to claim 1, wherein the pre-dyed fiber or textile product is a denim fabric or a sewn product thereof. 5. A pre-dyed fiber or textile product, characterized by using the dye adhesion inhibitor according to any one of claims 1 to 3 when treating the pre-dyed fiber or textile product. Processing method. 6. The method according to claim 5, wherein the pre-dyed fiber or textile product is a denim fabric or a sewn product thereof. 7. The method according to claim 5, wherein an enzyme is used when treating the pre-dyed fiber or textile.