JPH08113875A - Coated polyester fiber cloth and its production - Google Patents

Abstract

PURPOSE: To produce coated polyester fiber cloth having excellent dye-transfer soiling fastness and free from yellowing tendency by dyeing a polyester fiber structure with a disperse dye and treating the dyed structure with a resin liquid containing a specific component. CONSTITUTION: A polyester fiber dyed with a disperse dye is coated with a resin liquid containing an organic peroxide (preferably a diacyl peroxide such as benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, etc.) and an epoxy-based cross-linking agent and the coated product is dried and coagulated to obtain a coated cloth having excellent washing fastness, dye-transfer resistance and soiling fastness. This process enables extremely easy production of the coated fiber without using particular processing apparatus. The resin is preferably acrylic resin or silicone resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a polyester fiber coated cloth having no disperse dye migration property.

[0002]

2. Description of the Related Art At present, a generally used coated fabric is a woven or knitted fabric mainly composed of nylon fibers, for example, water-repellent / waterproof, moisture-permeable / water-repellent, air-permeable, flameproof / fusible coating. Various products subjected to such processing are widely used for clothing or industrial use. However, in recent years, the price difference with polyester has been further widened due to soaring prices of nylon fiber raw materials. Therefore, as an alternative to nylon fibers, the development of a coating process of polyester fibers, which is superior in features such as dimensional stability, strength, light resistance, and variety of materials, has been actively performed. However, the polyester fiber-coated cloth has a fatal problem that the dye in the polyester fiber is transferred to the coating film, resulting in significant contamination.

For example, when a dark-colored and light-colored or white-coated surface of a polyester fiber-coated cloth comes into contact, the disperse dye on the dark-colored side easily migrates to the light-colored or white-coated surface to cause contamination.

The reason for this is that fibers and dyes are not chemically bound to each other, as in the case of nylon acid dyeing, but in the case of polyester fiber disperse dyeing, the fiber substrate is relaxed and dye molecules are The dye is physically pushed in to complete the dyeing, and because the disperse dye has solubility and affinity for organic solvents and synthetic resins, the dye in the fiber is transferred to the coating layer by the coating process. It is thought to be from.

Various studies have been conducted to date on such a problem, for example, fine metal powders of aluminum, copper, silver, etc., proposed in JP-A-60-45686, potassium titanate, titanium dioxide. , A metal oxide such as stannic oxide, which has a poor compatibility with the disperse dye, to prevent migration of the sublimating dye, and JP-A-58-4873 and JP-B-62-53632. Japanese Patent Application Laid-Open Publication No. 2004-242242, a method for processing a fiber structure, in which a water repellent having a perfluoroalkyl group is added to a fiber structure formed with a polyurethane resin film containing porous particles containing SiO ₂ as a main component, Alternatively, JP-A-4-174
No. 771 has proposed a method of coating a resin composition containing an organometallic coordination compound.

However, in these above-mentioned conventional techniques,
Dispersion dye migration / contamination prevention is not perfect, and there are drawbacks such as migration contamination prevention performance disappearing by washing.
The reality is that it has not been put to practical use.

Therefore, the inventors of the present invention have disclosed a method of making a dye colorless in a resin by utilizing the oxidizing action of a salt such as a zirconium compound, as disclosed in JP-A-4-281078 and JP-A-6-26108.
It has been proposed in Japanese Patent Publication-93563. However, this method has the drawback that the oxidizing action of the salt is effective for certain dyes and the dyes used in the polyester fiber structure are limited.

Further, the inventors of the present application have filed Japanese Patent Application No. 5-254.
No. 54 proposes a polyester fiber-coated cloth capable of preventing dye migration contamination, which is not limited to the type of dye, and a method for producing the polyester fiber-coated cloth. However, it was found that the resin coating may be yellowed depending on the type of the cross-linking agent used, and a slight discoloration may be observed on the coated cloth due to this effect.

[0009]

The object of the present invention is to improve the yellowing property of Japanese Patent Application No. 25454/1993, and the polyester fiber coating is not limited to the type of disperse dye and has no dye migration stain resistance. It is intended to provide a processed cloth and a method for easily and stably producing the polyester fiber-coated processed cloth.

[0010]

In order to achieve the above object, the present invention has the following constitution. That is, it is a processing cloth obtained by coating a polyester fiber structure dyed with a disperse dye with a resin, wherein the coating resin contains an organic peroxide and an epoxy-based cross-linking agent. It is cloth.

The manufacturing method of the present invention has the following structure.

That is, in a method for producing a polyester fiber-coated processed cloth, a polyester fiber structure dyed with a disperse dye is coated with a resin solution prepared by mixing an organic peroxide and an epoxy crosslinking agent. is there.

Hereinafter, the present invention will be described in detail. The present invention has been completed by clarifying that the organic peroxide mixed in the resin layer chemically reacts with the disperse dye and exhibits a decoloring effect, and the durability of the performance by washing the product is also improved. It has both. That is, the present invention is different from the conventional technique in which the migration of the dye is prevented by a resin coating or fine particles having a small affinity and compatibility with the disperse dye, and the disperse dye that migrates from the fiber base cloth in the coating process. Is chemically reacted with the organic peroxide mixed in the resin layer to make it colorless, thereby preventing dye migration contamination of the disperse dye, and was completed by a completely new technical idea. As a method of making the dye colorless, there is a method of decomposing the dye with a reducing agent, but when it is made into a product, odor is strongly emitted, which is not preferable in practice.

In the present invention, an organic peroxide used for enabling a chemical reaction to colorless the disperse dye that migrates from the fiber base fabric in the resin layer, which is a system in which slightly restricted molecular motion is allowed. Examples of the product include ketone peroxide, peroxyketal, hydroperoxide, dialkyl peroxide, diacyl peroxide, peroxydicarbonate, peroxyester, and the like. Benzoyl peroxide, 2,4-dichloroperoxide Diacyl peroxide such as benzoyl is particularly preferably used.

Further, since the migration of the dye is large in the coating processing step, particularly in the drying step, it is preferable to use one whose decomposition temperature by heating the organic peroxide is equal to or higher than the temperature in the coating drying step. Specifically, depending on the selected drying conditions, for example, one having a decomposition temperature of 60 ° C. or higher, more preferably 80 ° C. or higher is effectively used. Although the upper limit of the decomposition temperature is not particularly limited, it is generally 150.
It is about ℃.

An appropriate amount of these organic peroxides used is 0.2 with respect to the amount of solvent contained in the coating resin.
~ 20 wt%. If it is less than 0.2 wt%, it is difficult to obtain a sufficient effect, and if it is more than 20 wt%, not only the effect is saturated, but also the discoloration and texture of the dyed fabric tend to be hardened. It is preferably 0.5 to 10 wt%.

In the present invention, it is important to use an epoxy crosslinking agent as the crosslinking agent used in combination with the organic peroxide. On the other hand, it is not preferable to use a combination of a cyanate crosslinking agent and an organic peroxide used in the conventional resin coating process, because the resin film turns yellow and the hue of the coated fabric is changed. The amount of the epoxy cross-linking agent used in the present invention is 0.5 with respect to 100 parts by weight of the coating resin, from the viewpoint of maintaining the film strength and not curing the texture of the work cloth.
It is preferably ˜5 parts by weight, more preferably 1 to 3 parts by weight.

The polyester fiber structure in the present invention can be any of woven fabrics, knitted fabrics, non-woven fabrics, etc. made of 100% polyester, as well as mixed spinning, mixed fiber, mixed twisting, mixed woven, mixed knitting, etc. containing polyester fibers. Although not particularly limited, the effect of the present invention is remarkable when the polyester is 100% and the polyester fiber is mixed at a high ratio.

Dyeing of the polyester woven or knitted fabric for coating used in the present invention does not require a particularly limited disperse dye or special dyeing conditions, but is usually dyed with an azo or quinone dye. Can be used.

The coating resin used in the present invention includes polyurethane resins, acrylic acid or methacrylic acid ester resins, silicone resins, polyvinyl alcohol resins, vinyl chloride resins, vinyl acetate resins or cellulose resins. Alternatively, various resin agents used for general coating such as a composite system of these can be freely selected and used. Of these, acrylic resins and silicone resins are preferable.

The present invention is for coating by mixing and dissolving the above-mentioned organic peroxide in a solution of the above-mentioned resin, or by previously dissolving it in a solvent having the same solvent as that of the resin solution and mixing and dissolving it in the resin solution. Make a resin solution. Epoxy crosslinking agent is added to this resin solution,
The addition timing and the addition method are not particularly limited.
The coated fabric of the present invention can be obtained by coating the polyester fiber structure with the coating resin solution. The coating method of the resin solution for coating is not particularly limited, and it can be processed by a usual method.

The effect of the present invention is remarkable in a dry method in which a resin solution in which an appropriate amount of an organic peroxide and an epoxy-based crosslinking agent are mixed is coated on a fiber cloth and then dried to remove the solvent.

That is, by the dry coagulation, the dye extracted by the resin solvent and transferred into the resin during the drying step is decomposed by the organic peroxide to be colorless. further,
The colorless dye in the present invention is colorless even if it is transferred to another resin film, and has very little contamination. Further, since the resin coating does not yellow, the hue of the coated cloth is not changed.

In the present invention, the reason why the above-mentioned effect is obtained is not clear, but it is presumed that the dye molecule changes its resonance structure due to the oxidation reaction and becomes colorless.

[0025]

EXAMPLES The present invention will now be described in more detail by way of examples. The dye transfer stain fastness in the examples was evaluated according to the following method. Make sure that the coated surface and uncoated surface of the test piece (5 cm x 5 cm) come in contact with the coated surface of the polyester attached white cloth (5 cm x 5 cm, which is the same cloth as the test piece and coated with the same resin as the test piece). It is sandwiched between two glass plates and a load of 4.5 kg is applied to it in a constant temperature dryer (120 ± 2 ° C) for 8 hours.
After leaving it for 0 minutes and allowing it to cool, the state of dye transfer from the test piece to the attached white cloth was evaluated by a gray scale for contamination.
Regarding the washing durability of dye transfer stain fastness, JI
After washing according to S L1096 (method using a stirring type washing machine), the dye transfer stain fastness was judged by the same method as above, and the washing durability was evaluated. The results are shown in Tables 1 and 2 in () in the column of dye transfer stain fastness.

As for the yellowing of the resin coating, the same resin was coated on undyed white cloth and the degree of yellowing was shown by gray scale on a gray scale. The following resins were used as the coating resins used in Examples and Comparative Examples. Acrylic resin (Chriscoat P-1019LV: manufactured by Dainippon Ink Co., Ltd.) Silicone resin (Toray Silicone SD8001: manufactured by Toray Silicone Co., Ltd.) Crosslinking agent (CR-5L: epoxy crosslinking agent manufactured by Dainippon Ink Co., Ltd.) (Chrisbon NX An isocyanate-based cross-linking agent manufactured by Dainippon Ink and Chemicals, Inc. [Example 1] A plain disperse dye (CIDisperse Y-64, CIDisperse R-60) prepared by using a plain woven fabric made of polyester filament yarn having a warp yarn of 50 denier and a weft yarn of 75 denier.
, CIDisperse B-125) with 3% owf at a temperature of 1
Dyeing was performed under the conditions of 30 ° C. for 60 minutes, ordinary reduction washing was performed, and after drying, heat setting was performed at 180 ° C. to obtain a dyeing cloth for coating. On the other hand, the solid content concentration is 15
% Acrylic resin in toluene solution, 5 wt% of benzoyl peroxide is mixed and dissolved with respect to the solvent amount of the resin solution to prepare a coating resin solution, and then an epoxy resin is added to 100 parts by weight of the resin solution. A coating resin solution was prepared by adding 3 parts by weight of a crosslinking agent CR-5L.

Next, the resin solution is coated on the above-mentioned dyeing cloth for coating with a knife coater, and a film is formed by a dry method (130 to 160 ° C./2 minutes).
A coated fabric of m ² was obtained. Table 1 shows the evaluation results of the dye transfer stain fastness of this coated cloth and the yellowing of the resin coating.

[Examples 2 to 4] The organic peroxide, the epoxy type crosslinking agent CR-5L, and the coating resin shown in Table 1 were used to perform dry coating under the same conditions as in Example 1.

Table 1 shows the evaluation results of the dye transfer stain fastness of this coated cloth and the yellowing of the resin coating.

[Comparative Examples 1 to 4] Table 1 shows the evaluation results on the dye transfer stain fastness of the coated cloth using the isocyanate cross-linking agent Crisbon NX as the cross-linking agent and the yellowing of the resin coating.

[Comparative Examples 5 to 8] The dyeing cloth for coating obtained in Example 1 was mixed with an organic peroxide to dissolve an acrylic resin, a silicone resin and an epoxy crosslinking agent CR-5L.
Alternatively, only the resin containing the isocyanate cross-linking agent Crisbon NX was dry-coated under the same conditions as in Example 1. Table 1 shows the evaluation results of the dye transfer stain fastness of this coated cloth and the yellowing of the resin coating.

[0032]

[Table 1] As is clear from Table 1, those of Examples 1 to 4 show markedly excellent dye transfer stain fastness as compared with the coated fabrics containing no organic peroxide of Comparative Examples 5 to 8. I understand. It also had excellent wash durability.

In the case of using the epoxy-based crosslinking agent in combination with the organic peroxide, the yellowing of the resin coating is extremely small, and in the case of the isocyanate-based coating, the dye transfer stain fastness is excellent, but the resin coating It can be seen that the yellowing is large.

[0034]

The polyester fiber coated fabric according to the present invention has excellent dye transfer stain fastness and excellent washing durability. Further, the yellowing of the resin coating is extremely small, and the discoloration of the coated cloth due to the yellowing can be greatly improved. On the other hand, according to the method of the present invention, it is possible to stably produce the above-mentioned coated fabric without requiring a very simple and special device,
The industrial effect is extremely large.

Claims (4)

[Claims] 1. A work cloth obtained by coating a polyester fiber structure dyed with a disperse dye with a resin, wherein the coating resin contains an organic peroxide and an epoxy crosslinking agent. Textile coated cloth. 2. The polyester fiber coated cloth according to claim 1, wherein the coating resin is an acrylic resin or a silicone resin. 3. The polyester fiber coated cloth according to claim 1, wherein the organic peroxide is diacyl peroxide. 4. A process for producing a polyester fiber coated cloth, which comprises coating a polyester fiber structure dyed with a disperse dye with a resin solution obtained by mixing an organic peroxide and an epoxy crosslinking agent.