JPH0411068A - Production of coated fabric - Google Patents

Abstract

PURPOSE:To obtain a coated fabric excellent in adhesion to coating films without any migrating properties of a dye by irradiating a polyester textile fabric with ultraviolet rays, then dyeing the resultant fabric with a disperse dye and subsequently subjecting the fabric to coating processing. CONSTITUTION:A polyester textile fabric is irradiated with ultraviolet rays at >=300nm wavelength and dyed with a disperse dye or initially dyed with the disperse dye, subsequently irradiated with the ultraviolet rays and then subjected to coating processing with preferably a polyurethane-based, a polyacrylic, a polyvinyl chloride-based, a polyvinyl acetate-based resin, etc., to afford the objective coated fabric good in adhesion of fiber to a coating film and excellent in properties of preventing the dye from migrating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a coated fabric made of polyester fibers that has excellent adhesion to a coating film and is free from dye migration.

[Prior Art] Many coating processes have been used to provide water repellency, waterproofness, moisture permeability, and other properties for industrial materials and sports clothing.

The fiber materials used for these coated fabrics are mainly nylon fibers.

However, nylon fibers have weaknesses in mechanical properties such as dimensional stability and wrinkle resistance, as well as light resistance, wet fastness,
It has essential drawbacks such as chlorine fastness.

In response, there is an increasing trend to use polyester fibers, which have excellent mechanical properties and functions such as wash-and-wear properties, as coating base fabric materials.

However, when polyester fiber fabrics are coated with acrylic resin, urethane resin, or PVC resin, the adhesion with the coating film is poor, and in the case of disperse dye dyed polyester fibers, the dye is It has the fatal disadvantage that it migrates over time and contaminates the coating film that is in contact with it.

As a method for improving the adhesion between such a coating film and polyester fibers, for example, a method of adhering the coating film with another adhesive has been adopted.

In addition, the latter dye transfer occurs when polyester is dyed by relaxing the fiber matrix and physically forcing the disperse dye molecules into it, rather than using a dyeing mechanism based on chemical bonds with acidic dyes, as in the case of nylon, for example. It is thought that the fact that disperse dyes have solubility and affinity for organic solvents and synthetic resins works synergistically to cause the disperse dyes in the fibers to migrate to the coating layer. It will be done.

This phenomenon is particularly noticeable when a dark-dyed polyester fiber comes into contact with a light-colored or white coating film, and the light-colored or white coating surface is significantly contaminated with the dark-colored dye.

Due to these facts, the demand for coated polyester fabrics has not increased, and coated fabrics made of nylon, cotton, or cationic dyeable polyester materials are currently being used, even if their performance is inferior. be.

As a method for preventing such migration contamination of coated polyester fiber fabrics, there is a method described in Japanese Patent Application Laid-Open No. 59-82
A method of forming a crosslinked film on melamine or a melamine derivative by steam processing and further plasma treating this film as proposed in Japanese Patent Application Laid-Open No. 62-28484; There is a method of simply subjecting the surface layer of the fiber to plasma treatment, as in Japanese Patent Laid-open No. 97467, or a method of attaching a fluorine-based polymer by plasma treatment in fluorine gas, as in Japanese Patent Application Laid-Open No. 61-45784. Proposed.

[Problems to be Solved by the Invention] However, in the method of separately applying an adhesive to improve the adhesion between the coating film and polyester fibers, the texture of the coated fabric becomes rough and hard, making it unsuitable for commercial use. The drawback was that you could only get things of low value.

In addition, the above-mentioned method (1) for preventing dye migration has the disadvantage that there are restrictions on the shape of the fiber structure and that the texture changes significantly due to the thick melamine coating. In addition, method (2) requires a special vacuum container to generate low-temperature plasma, requires complete drying, and requires a long time for processing. However, it had the disadvantage of being extremely unproductive.

In view of the drawbacks of the prior art, the present invention has two advantages: although it is a polyester fiber cloth, it has excellent adhesion to the coating film and is also excellent in preventing migration of disperse dyes.
The object of the present invention is to provide a technique for manufacturing an excellent coated fabric that has many effects at the same time.

[Means for Solving the Problems] In order to achieve the above object, the present invention employs the following configuration.

That is, the method for producing a coated fabric of the present invention is characterized by coating a polyester fiber fabric after irradiating it with ultraviolet rays, and dyeing it with a disperse dye after irradiating the polyester fiber fabric with ultraviolet rays,
It is characterized in that it is then subjected to coating processing, and furthermore, it is characterized in that after dyeing the polyester fiber with a disperse dye, it is irradiated with ultraviolet rays and then coated.

[Effect] The present invention will be explained in detail below.

Polyester fibers that can be dyed with disperse dyes in the present invention include polyethylene terephthalate, polybutylene terephthalate, or those obtained by copolymerizing or blending these with a third component such as isophthalic acid sulfonate, adipic acid, isophthalic acid, polyethylene glycol, etc. Fibers made of hard polymers such as polyethylene terephthalate and polybutylene terephthalate are preferably used as the main fibers.

As the fabric made of such fibers, woven or knitted fabrics, non-woven fabrics, etc. can be used.

It should be noted that other fibers such as cotton, wool, nylon, etc. may be mixed with the above-mentioned polyester fibers within a range that does not impede the above-mentioned effects of the present invention.

The disperse dye referred to in the present invention may be any disperse dye that can be diffused into a known polyester that is normally applied to polyester fibers, and does not need to be a special dye. Further, the method for dyeing polyester fibers with such a disperse dye may be a method normally used when dyeing the fibers, and there is no need to select a method in particular.

In the present invention, the desired effect can be achieved even if the polyester fiber fabric is irradiated with ultraviolet rays at any stage before or after dyeing with a disperse dye.

That is, by irradiating the surface of polyester fiber with ultraviolet rays, functional groups are formed on the surface of the fiber, and changes occur in the molecular arrangement or structure of the fiber surface matrix, which improves adhesion and improves the ability of disperse dyes. It is presumed that the transition will be blocked.

Such adhesion and dye migration prevention effects are noticeable in coated fabrics.

For the ultraviolet irradiation in the present invention, a known device can be used, and the light source can be a high-pressure mercury lamp, a metal halide lamp, a xenon lamp, a low-pressure mercury lamp, etc., and is not particularly limited. .

However, such a light source preferably has as few wavelengths as possible larger than 300 nm;
It is preferable to use one that contains many of the following wavelengths. In particular, 184.9r
A low-pressure mercury lamp with a peak at +m and 253.7 nm is preferably used. That is, ultraviolet rays of 300 nm or less have the unique effect of not decomposing disperse dyes, in addition to being excellent in the above-mentioned effects of improving adhesion and preventing dye migration.

The irradiation intensity is preferably 3 mw/car or more, more preferably 10 nv/cnf or more, particularly preferably 30 m
A condition of a time of w/cflf or more, preferably several seconds to several tens of minutes, can be used, but the condition is not limited to such conditions. As for such irradiation conditions, it is preferable to set a combination of illuminance and processing time depending on the purpose.

The ultraviolet irradiation of the present invention may be carried out not only in a normal pressure atmosphere but also in a reduced pressure or pressurized atmosphere depending on the purpose.

The coating process referred to in the present invention is a commonly used coating method, and is not particularly limited.

That is, a resin film is applied to at least one side of the polyester fiber fabric by a dip nip method, a dipping method, a dry coating method, a wet coating method, a laminate method, or the like.

As the resin here, synthetic resins commonly used for coating processing can be used, but polyurethane resins, polyacrylic resins, polyvinyl chloride resins, polyvinyl acetate resins, etc. are preferably used. be able to. Although such resins cause severe dye migration of disperse dyes, the present invention can easily improve this to a practical level. In particular, the effect is remarkable on dry-coated products, wet-coated products, and laminates made of the above-mentioned resins.

[Examples] Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples.

In addition, the dye transfer stain fastness in Examples and Comparative Examples was evaluated according to the following method.

The coated surface of the test piece (5ccn x 5cm) and the attached piece (with the same resin coated on the same white cloth as the test piece)
5 cm
Heat treatment is performed for 80 minutes.

As a result, the dye staining state of the attached white cloth was determined on a gray scale, and this was expressed as a grade and evaluated as dye migration stain fastness.

In addition, the adhesion of the coating film is as follows: Tsuki SK-6328-
Evaluation was made according to the 1977 method.

Examples 1 to 5, Comparative Example 1 A plain woven fabric made of polyethylene terephthalate filament using 24 filaments of 50 denier for the warp and 36 filaments of 75 denier for the weft was refined by a conventional method and heat set at a temperature of 180°C for 1 minute. was applied.

Next, disperse dye Resolin Blue FBL (Resol
in Blue FBL) 130 at a concentration of 3% owl
Stain for 65 minutes at ℃, reduce and wash using the usual method.
After washing with water, it was heat set at a temperature of 170°C.

After this dyed fabric was irradiated with ultraviolet rays under the following conditions, the irradiated surface was coated with a dimethylformamide solution of polyester polyurethane resin (Crysbon 8006HV, manufactured by Sanyo Chemical Co., Ltd.) using a knife coater, and solidified using a wet method. , coating was carried out at a coating amount of 25 g/rrr.

The dye transfer prevention properties of this coated fabric were evaluated and the results are shown in Table 1.

(Ultraviolet irradiation conditions) Light source: Low pressure mercury lamp (Toshiba Lytic (transverse split) Irradiation intensity: 40 my/Cr1 (wavelength 253.7 nm) Treatment time = 0.5 to 20 minutes Table 1 Examples 1 to 5 are as follows: It can be seen that the dye transfer prevention performance improves as the irradiation time increases, reaching an especially excellent level with ultraviolet irradiation for 5 minutes or more.Also, the peeling strength of the coating film is compared with all examples. Example 1
It showed a higher value than that of .

Example 6 A dyed fabric prepared in the same manner as in Example 1 was treated with a filter.
Irradiation intensity 40 mv/ that cuts ultraviolet rays of 00 nm or less
Using a car high-pressure mercury lamp (manufactured by Iwasaki Electric),
It was irradiated for 0 minutes.

The color of the dyed fabric after irradiation was slightly faded.

However, when this fabric was coated in the same manner as in Example 1, the dye migration prevention property was grade 3, and the peel strength was 730.
g/cm, and all showed better values than Comparative Example 1.

Example 7, Comparative Example 2 A polyethylene terephthalate fiber twill fabric with a warp of 75 deniers and 24 filaments and a weft of 75 deniers and 48 filaments was scoured by a conventional method and then heat set at 180° C. for 1 minute.

The set fabric was heated at 50 my/c using the same light source as in Examples 1 to 5.
After 10 minutes of irradiation treatment at an illumination intensity of NF (wavelength 253.7 nm), Resolin Blue FBL (disperse dye)
Staining was carried out at 130° C. for 60 minutes at 3% OVF, followed by reduction washing, water washing, and heat setting at 160° C. using conventional methods. Next, coating processing was carried out in the same manner as in Examples 1 to 5.

The dye migration fastness of these coated fabrics was 3rd to 4th grade, and the peel strength was 1020 g/cm.

For comparison, dyeing and coating were carried out in the same manner as in Example 7 without irradiating ultraviolet rays (Comparative Example 2).

The dye transfer fastness of this coated fabric was grade 1.

[Effects of the Invention] The present invention provides a coated fabric which is coated with a polyester fiber fabric dyed with a disperse dye, but which has excellent properties to prevent migration of the disperse dye, and which also has excellent adhesion of the coating film. can be provided.

According to the present invention, it is possible to provide a stain-resistant coated fabric that is extremely effective for industrial material applications and sports clothing applications.

Patent applicant Higashi Shikikai Co., Ltd.

Claims (4)

[Claims] (1) A method for producing a coated fabric, which comprises irradiating a polyester fiber fabric with ultraviolet rays and then coating the fabric. (2) A method for producing a coated fabric, which comprises irradiating a polyester fiber fabric with ultraviolet rays, dyeing it with a disperse dye, and then coating it. (3) A method for producing a coated fabric, which comprises dyeing polyester fibers with a disperse dye, irradiating them with ultraviolet rays, and then coating them. (4) The method for producing a coated fabric according to claim (1), (2) or (3), wherein the ultraviolet rays contain an ultraviolet component having a wavelength of 300 nm or less.