JP3257285B2 - Polyester fiber coated fabric and method for producing the same - Google Patents

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 Currently, coated fabrics generally used are woven or knitted fabrics mainly composed of nylon fibers, for example, water-repellent / waterproof, moisture-permeable / water-repellent, breathable, flame-proof and fusion-proof coatings. 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 coated fabric of the polyester fiber has a fatal problem that the dye in the polyester fiber migrates to the coating film and is consequently contaminated.

For example, in the case of a coated fabric made of polyester fiber, when a dark color and a light or white coating surface come into contact with each other, the disperse dye on the dark color side easily migrates to the light or white coating surface, causing contamination.

[0004] The reason for this is that fibers and dyes are not chemically bonded, as in the case of acid dyeing of nylon, for example, but in the case of disperse dyeing of polyester fibers, the fiber substrate is relaxed and dye molecules are formed. The dye is physically pressed to complete the dyeing. In addition, the disperse dye has solubility and affinity for organic solvents and synthetic resins. It is considered that

Various studies have been made to date on such problems. For example, fine powders of metals such as aluminum, copper and silver, potassium titanate and titanium dioxide proposed in Japanese Patent Application Laid-Open No. 60-45686 are disclosed. A method of using a metal oxide such as stannic oxide or the like and having a poor compatibility with a disperse dye to prevent the transfer of the sublimable dye, and a method disclosed in JP-A-58-4873 and JP-B-62-53632. Patent Document 1: A method of processing a fiber structure in which a water repellent having a perfluoroalkyl group is applied to a fiber structure on which a polyurethane resin film containing porous particles containing SiO ₂ as a main component is formed, Alternatively, JP-A-4-174
No. 771 has proposed a method of coating a resin composition containing an organometallic coordination compound.

However, in these conventional techniques,
Disperse dye migration / contamination prevention is not perfect, or has the disadvantage that the migration contamination prevention performance is lost by washing,
At present, it has not been put to practical use.

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-6-28178.
No.-93563. However, this method has a drawback that the oxidizing action of the salt is effective for a specific dye, and the dye used for the polyester fiber structure is limited.

[0008] Further, the inventors of the present invention have disclosed a Japanese Patent Application No. 5-254.
No. 54 proposed a polyester fiber coated cloth preventing dye transfer contamination which is not limited to the kind of the dye, and a method for producing the polyester fiber coated cloth. However, it was found that, depending on the type of the cross-linking agent used, the resin film was yellowed, and due to this effect, discoloration was slightly observed on the coated fabric.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the yellowing of Japanese Patent Application No. 5-25454, and to provide a polyester fiber coating free of dye transfer contamination without being limited to the type of disperse dye. It is an object of the present invention to provide a work cloth and a method for easily and stably producing the polyester fiber coated work cloth.

[0010]

In order to achieve the above object, the present invention has the following arrangement. That is, a processed 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 crosslinking agent. It is cloth.

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

That is, a method for producing a polyester fiber coated fabric characterized by coating a resin solution prepared by mixing an organic peroxide and an epoxy crosslinking agent onto a polyester fiber structure dyed with a disperse dye. is there.

Hereinafter, the present invention will be described in detail. The present invention has been completed by investigating that the organic peroxide mixed in the resin layer chemically reacts with the disperse dye and exerts a decolorizing 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 prior art in which migration of the dye is inhibited by a resin film or fine particles having a small affinity and compatibility with the disperse dye, and the disperse dye migrating from the fiber base fabric in the coating process. Is chemically reacted with an organic peroxide mixed in the resin layer to make it colorless, thereby preventing dye transfer contamination of the disperse dye, and has been completed by a completely new technical concept. As a method of making the dye colorless, there is a method of decomposing the dye with a reducing agent. However, when the product is produced, the odor is strongly diffused, which is not practically preferable.

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

In addition, since the transfer of the dye is large in the coating process, particularly in the drying process, it is preferable to use one in which the decomposition temperature of the organic peroxide by heating is higher than the temperature in the coating drying process. Specifically, depending on the selected drying conditions, for example, those having a decomposition temperature of 60 ° C. or higher, more preferably those having a decomposition temperature of 80 ° C. or higher are effectively used. The upper limit of the decomposition temperature is not particularly limited, but is generally 150.
It is about ° C.

The appropriate amount of these organic peroxides used is 0.2 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 cloth tend to be hardened. Preferably it is 0.5 to 10 wt%.

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

The polyester fiber structure in the present invention can be used for not only woven fabric, knitted fabric and non-woven fabric of 100% polyester but also blended, mixed, twisted, interwoven, and interwoven of polyester fibers. Although there is no particular limitation, the effect of the present invention is remarkable for a mixture of 100% polyester or a high proportion of polyester fiber.

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

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

[0021] The present invention provides a method for coating by mixing and dissolving the above-mentioned organic peroxide in a solution of the above resin, or mixing and dissolving in a resin solution a solution previously dissolved in the same solvent as the resin solution. Make a resin solution. An epoxy-based crosslinking agent is added to this resin solution.
The timing of addition and the method of addition are not particularly limited.
The coated fabric of the present invention can be obtained by coating the polyester fiber structure with the resin solution for coating. The coating method of the coating resin solution is not particularly limited, and it can be processed by an ordinary 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 dry coagulation, the dye extracted with 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 when transferred to another resin film, and has extremely low contamination. Further, since there is no yellowing of the resin film, no change in the hue of the coated fabric is observed.

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

[0025]

The present invention will be described below in more detail with reference to examples. Evaluation of the dye transfer stain fastness in the examples was performed according to the following method. The coated surface of the test piece (5 cm x 5 cm) and the uncoated surface are coated with a polyester-attached white cloth (5 cm x 5 cm, coated with the same resin as the test piece with the same fabric). Place between two glass plates and apply a load of 4.5 kg in a constant temperature drier (120 ± 2 ° C).
After leaving it to stand for 0 minutes and allowing it to cool, the state of dye transfer from the test piece to the attached white cloth was graded using a gray scale for contamination.
In addition, the washing durability of the dye transfer stain fastness was determined by JI.
After washing in accordance with SL1096 (method using a stirrer type washing machine), the dye transfer stain fastness was determined by the same method as described above, and the washing durability was evaluated. The results are shown in Table 1 and Table 2 in the column of Dye transfer stain fastness.
).

Regarding the yellowing of the resin film, the undyed white fabric was coated with the same resin, and the degree of yellowing was indicated by a gray scale on a gray scale. The following coating resins were used in Examples and Comparative Examples. Acrylic resin (Chris Coat P-1019LV: manufactured by Dai Nippon Ink Co., Ltd.) Silicone resin (Toray Silicone SD8001: manufactured by Toray Silicone Co., Ltd.) Crosslinking agent (CR-5L: Epoxy cross-linking agent manufactured by Dai Nippon Ink Co., Ltd.) (Crisbon NX) Example 1: Isocyanate-based cross-linking agent manufactured by Dainippon Ink Co., Ltd. [Example 1] A plain fabric using polyester filament yarn having a warp of 50 denier and a weft of 75 denier was used as an azo-based disperse dye (CIDisperse Y-64, CIDisperse R-60).
, CI Disperse B-125) 3% owf, temperature 1
Dyeing was performed at 30 ° C. for 60 minutes, followed by ordinary reduction washing, drying, and heat setting at 180 ° C. to obtain a dyed fabric for coating. On the other hand, when the solid concentration is 15
% Of a toluene solution of an acrylic resin, and 5 wt% of benzoyl peroxide with respect to the solvent amount of the resin solution was mixed and dissolved to prepare a coating resin solution. 3 parts by weight of a crosslinking agent CR-5L was added to prepare a coating resin solution.

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

[Examples 2 to 4] Dry coating was carried out under the same conditions as in Example 1 using the organic peroxide, epoxy crosslinker CR-5L and coating resin shown in Table 1.

The results of evaluation of the dye transfer stain fastness of the coated fabric and the yellowing of the resin film are shown in Table 1.

[Comparative Examples 1-4] Table 1 shows the evaluation results of the dye transfer stain fastness of the coated fabric and the yellowing of the resin film of the coated fabric using the isocyanate crosslinking agent Chrisbon NX as the crosslinking agent.

[Comparative Examples 5 to 8] An acrylic resin, a silicone resin and an epoxy-based cross-linking agent CR-5L in which the organic peroxide is not mixed and dissolved in the dyed cloth for coating obtained in Example 1.
Alternatively, only a resin comprising the isocyanate-based crosslinking agent Chrisbon 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 the coated fabric and the yellowing of the resin film.

[0032]

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

In the case of using an epoxy-based crosslinking agent in combination with an organic peroxide, the yellowing of the resin film is extremely small. In the case of the isocyanate-based resin, excellent dye transfer stain fastness is obtained. It turns out that 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 film is extremely small, and the discoloration of the coated work cloth due to the yellowing can be significantly improved. On the other hand, according to the method of the present invention, it is possible to stably produce the above-mentioned coated work cloth without requiring a very simple and special device,
The industrial effect is extremely large.

Continuation of the front page (56) References JP-A-7-70923 (JP, A) JP-A-4-214482 (JP, A) WO 94/18375 (WO, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 13/00-15/715

Claims (4)

(57) [Claims] 1. A processed 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. Textile coated fabric. 2. The polyester fiber coated fabric according to claim 1, wherein the coating resin is an acrylic resin or a silicone resin. 3. The polyester fiber coated fabric according to claim 1, wherein the organic peroxide is diacyl peroxide. 4. A method for producing a polyester fiber coated fabric, comprising coating a resin solution obtained by mixing an organic peroxide and an epoxy crosslinking agent on a polyester fiber structure dyed with a disperse dye.