JPH10251966A - Coated cloth and method for producing the same - Google Patents

Abstract

An object of the present invention is to provide a coated fabric having a high effect of preventing dye transfer contamination and having excellent appearance quality, and a method for producing the same. The coated fabric of the present invention is characterized in that a polyester fiber fabric dyed with a disperse dye has pores smaller than 150 angstroms and 500 m
A dry coating resin film containing silicon dioxide particles having a surface area of not less than ² / g and silicon dioxide aggregated particles having an aggregated particle size of 300 μm or more in the coating resin film are 2 particles / cm ² or less. It is characterized in that there is a method of manufacturing such a coated cloth,
Using a polar organic solvent having an affinity for the coating resin and the silicon dioxide particles, the coating resin and the silicon dioxide particles have pores having a pore diameter of less than 150 Å and a surface area of 5 Å.
The method is characterized in that silicon dioxide particles having a particle size of at least 00 m ² / g are dispersed, and then the resin solution is dry-coated on a polyester fiber cloth dyed with a disperse dye.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art At present, dry-coated cloth generally used is a woven or knitted fabric mainly composed of nylon fibers, and various products subjected to processing such as waterproof coating are widely used for clothing or materials. ing.

[0003] However, in recent years, the price difference with polyester has been further increased due to soaring prices of raw materials for nylon fibers. Therefore, as a substitute for nylon fibers, coated fabrics using polyester fibers, which have advantages in characteristics such as dimensional stability, strength, and variety of materials, have been used.

However, the coated fabric of polyester fiber has a fatal problem that the disperse dye in the polyester fiber migrates through the coating film and significantly contaminates other coated fabrics.

For example, in the case of a polyester fiber-coated cloth, when the coating film surfaces of the dark-colored cloth and the light-colored or white-colored cloth come into contact with each other, the disperse dye in the coating film surface of the dark-colored cloth is colored. It easily migrates to the coating surface of the fabric, causing contamination.

The reason is that fibers and dyes are not chemically bonded as in the case of dyeing nylon fibers with acid dyes. In the case of dyeing polyester fibers with disperse dyes, the fiber substrate is relaxed and the dyes are dyed. Dyeing is completed by physically pushing molecules in.Disperse dyes are soluble and compatible with organic solvents and synthetic resins. It is considered that this is because the film migrates to the film.

Regarding this problem, for example, Japanese Patent Publication No. 7-78
As disclosed in Japanese Patent Publication No. 310-310, there is known a method of incorporating specific silicon dioxide particles into a coating resin film, which traps a disperse dye which easily migrates.

[0008]

However, in the case of a dry coating mainly composed of an acrylic resin, it is surely effective in preventing dye transfer contamination, but the dispersibility of silicon dioxide particles mixed in the coating resin solution is poor. As a result, aggregates of silicon dioxide are generated on the surface of the transparent coating resin film, and the appearance quality of the product is sometimes reduced.

[0009] In view of the drawbacks of the prior art, the present invention has
An object of the present invention is to provide a coated fabric having a high effect of preventing dye transfer contamination and having excellent appearance quality, and a method for producing the same.

[0010]

The present invention employs the following means in order to solve the above problems. That is, in the coated fabric of the present invention, a polyester fiber cloth dyed with a disperse dye has a dry coating resin film containing silicon dioxide particles having pores smaller than 150 angstroms and having a surface area of 500 m ² / g or more. And the number of silicon dioxide aggregated particles having an aggregated particle size of 300 μm or more in the coating resin film is 2 / cm ² or less. Using a polar organic solvent having an affinity for the coating resin and the silicon dioxide particles, the coating resin and the silicon dioxide particles have pores having a pore diameter of less than 150 Å and a surface area of 500 m ^2.
/ G or more is dispersed, and then the resin solution is dry-coated on a polyester fiber cloth dyed with a disperse dye.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the subject of the above-mentioned coated work cloth was intensively studied. As a result, a coating resin film containing a specific silicon dioxide was formed on the surface of a polyester fiber cloth colored with a disperse dye. However, surprisingly, they have sought to solve the above-mentioned problems at once.

[0012] The polyester fiber fabric in the present invention comprises:
It is dyed with a disperse dye, and can be used not only for woven or knitted fabrics or nonwoven fabrics made of 100% polyester fibers, but also for blended yarns, interwoven fabrics, intertwisted fibers, interwoven fibers, interwoven fabrics, etc. containing polyester fibers. Although not limited, the effect of the present invention is remarkable for a high-mixture containing 100% or 100% of polyester fiber, preferably 50% or more, more preferably 70% or more.

The resin for dry coating used in the present invention may be an acrylic resin, a polyurethane resin, a silicone resin, a vinyl chloride resin, a vinyl acetate resin, or a composite resin of these resins. However, an acrylic resin is preferably used.

In the present invention, the coating resin contains porous silicon dioxide particles in order to prevent the dye from migrating and contaminating the resin coated on the fiber cloth. Such silicon dioxide particles having a function of preventing dye transfer contamination are exhibited for the first time because they have pores having a pore diameter of less than 150 angstroms. Further, such a function preferably has a pore smaller than 100 angstroms and exerts a great effect. The pore diameter of the pores of the particles here means a simple substance of silicon dioxide, that is, an average interval between primary particles and primary particles, and is defined by JIS-K1.
150, which can be determined by measuring the average pore diameter by the mercury intrusion method.

That is, using a porosimeter (mercury intrusion device), a pressure is applied from the outside and pure mercury is sequentially filled in the pores of the silicon dioxide particles in accordance with the pressure, and the pressure and the pressure mercury amount are measured. The average pore diameter is determined from the pore diameter distribution obtained by converting into the pore diameter corresponding to the pressure. The conversion from the pressure to the pore diameter is specifically calculated by the following equation.

[0016]

(Equation 1) The pore diameter represents the diameter of primary particles of silicon dioxide and the pores, which are the gaps between the primary particles, when the pores are regarded as circular with the same area.

Furthermore, silicon dioxide particles having a surface area of 500 m ² / g or more are used from the viewpoint of the effect of preventing dye transfer contamination. The surface area as used herein refers to the sum of the surface areas of the primary particles, and is determined according to the specific surface area measurement method described in JIS-K1150. That is, the nitrogen adsorption isotherm was determined by the volumetric method. E. FIG. It is a specific surface area obtained by using the T formula.

The average particle size of the silicon dioxide particles used in the present invention is not particularly limited, but is preferably 1 to 10 μm.
(Call counter method).

The amount of the silicon dioxide particles added to the coating resin solution is not particularly limited, but is preferably 20% by weight or more based on the solid content of the coating resin in order to make the effect of the present invention remarkable. In addition, from the viewpoint of appearance quality and film physical properties, 200% based on the coating resin solid content.
% By weight or less is preferred.

In the present invention, in order to improve the appearance quality, when preparing the above resin solution for coating, a polar organic solvent having an affinity for the coating resin and the silicon dioxide particles is used as a dispersion medium for the silicon dioxide particles. Use a solvent.

The polar organic solvent having an affinity for the coating resin and the silicon dioxide particles contains an ester group in the molecule,
Organic compounds having polar groups such as ketone groups and alcohol groups. There is no particular limitation as long as it has an affinity for the coating resin and the silicon dioxide particles. For example, when the coating resin is an acrylic resin (toluene being a non-polar organic solvent is a solvent for the resin), ethyl acetate, methyl ethyl ketone, methyl alcohol , Ethyl alcohol, isopropyl alcohol, etc., and may be used alone or in combination of two or more. Further, it may be used as a dispersion medium in combination with a nonpolar organic solvent such as toluene.

The method for dispersing the silicon dioxide particles in the resin solution using the above-mentioned polar organic solvent is not particularly limited.・ Dispersion method,
Examples thereof include a method in which a polar organic solvent and silicon dioxide particles are simultaneously mixed and dispersed in a resin solution, and a method in which a polar organic solvent is mixed into a resin solution, and then silicon dioxide particles are added and mixed.

In the present invention, a polyester fiber cloth dyed with a disperse dye is dry-coated with a resin solution in which silica particles are finely dispersed. This dry coating method is not particularly limited, and using a knife coater, a gravure coater, a rotary screen, or the like,
It is finished by performing normal coating and then performing normal heat treatment.

The product obtained according to the present invention is not only excellent in dye transfer stain prevention performance, but also has silicon dioxide particles finely dispersed in a resin, and silicon dioxide aggregates are substantially formed on the coating resin film surface. And the appearance quality is extremely good. The silicon dioxide aggregates referred to here are coarse aggregates formed in the process of mixing the silicon dioxide particles into the resin solution, or coarse aggregates that could not be finely dispersed, and those that can be observed with the naked eye,
It has an aggregate particle size of 300 μm or more. In the present invention, the phrase "substantially free of such aggregated particles" means that silicon dioxide aggregated particles having a particle diameter of 300 µm or more are 2 particles / cm ² or less on average per unit area of the coating resin film surface, and more preferably 1 particle / cm ^{2 2} or less.

The measurement of the agglomerated particle diameter is performed using a scanning electron microscope photograph of the surface of the coating resin film, and a particle diameter of 300
This is performed by counting the number of silica aggregated particles having a size of μm or more.

[0026]

The present invention will be described below in more detail with reference to examples.

(1) Method of evaluating fastness to dye transfer contamination Between two glass plates so that the coated surface of a test piece (6 cm × 6 cm) comes in contact with the coated surface of a polyester attached white cloth of the same size. Scissors with a load of 4.5 kg, left in a constant temperature drier (120 ° C ± 2 ° C) for 80 minutes, and after cooling down, grade the stained white cloth on the dye transfer contamination using a gray scale for contamination. Do.

(2) Method for Measuring Aggregate Particle Size of Silicon Dioxide A photograph of the surface of the coating resin film was taken with a scanning electron microscope at a magnification of 50 times, and aggregated particles of silicon dioxide having a size of 300 μm or more were observed. The average value of the number of 10 observation points at different locations is determined.

(3) The following coating resins and crosslinking agents were used in Examples and Comparative Examples.

Acrylic resin: Chriscoat P1018A
(Manufactured by Dainippon Ink and Chemicals, Inc.) Polyurethane resin: Crisbon 2016EL (manufactured by Dainippon Ink and Chemicals, Inc.) Crosslinking agent: crisbon NX (manufactured by Dainippon Ink and Chemicals, Inc.) Example 1 50 denier warp and weft Plain woven fabric made of 75 denier polyester filament yarn is used as an azo disperse dye (CIDispers O-29, CIDispers R-127, CIDisp
ers R-167) 60% at 130 ° C. using 5% owf.
After being dyed under the conditions of 1 minute, subjected to ordinary reduction washing, and dried, heat set at 180 ° C. was performed to obtain a dyed cloth for coating.

On the other hand, 10 parts of silicon dioxide particles (pore diameter: 25 Å, surface area: 700 m ² / g, average particle diameter: 3.5 μm) were added to 50 parts of methyl ethyl ketone, and the mixture was stirred with a motor for 5 minutes. 100 parts of an acrylic resin (20 parts of resin solid content)
, And 2 parts of a crosslinking agent were mixed, and further stirred for 5 minutes to prepare a coating resin liquid. Next, this resin solution was coated on the above-mentioned dyed cloth with a knife coater and heat-treated to obtain a coated processed cloth having a coating amount of 5.5 g / m ² .

The average value of the aggregated particles of silicon dioxide in the obtained coating resin film was 0.2 particles / cm ² , indicating a good appearance. Further, the dye transfer stain fastness of this coated fabric was as good as grade 4-5.

Comparative Example 1 The same procedure as in Example 1 was carried out except that no silicon dioxide particles were used. The appearance was good, but the dye transfer stain fastness was secondary.

Comparative Example 2 The same procedure as in Example 1 was carried out except that silicon dioxide particles having a pore size of 210 Å, a surface area of 300 m ² / g and an average particle size of 2 μm were used. The appearance was good, but the dye transfer stain fastness was secondary.

Comparative Example 3 As silicon dioxide particles, pore size: 170 Å, surface area: 300 m ² / g, average particle size: 3.5 μm
The procedure was performed in the same manner as in Example 1, except that The appearance was good, but the dye transfer stain fastness was 2-3 class.

Comparative Example 4 The procedure of Example 1 was repeated, except that only toluene was used instead of methyl ethyl ketone. The dye transfer stain fastness of the coated fabric was as good as grade 4, but the average value of silicon dioxide aggregated particles in the coating resin film was 4 / cm ² and the appearance was poor.

Examples 2 to 4 Coating was carried out under the same conditions as in Example 1 except that the type of silicon dioxide particles was changed. Table 1 shows the evaluation results of the coated cloth.

[0038]

[Table 1] Examples 5 to 10 Coating was performed under the same conditions as in Example 1 except that the amount of silicon dioxide particles added was changed. Table 2 shows the evaluation results of the coated cloth.

[0039]

[Table 2] Examples 11 to 13 Coating was performed under the same conditions as in Example 1 except that the type of the polar organic solvent was changed. Table 3 shows the evaluation results of the coated cloth.

[0040]

[Table 3] Example 14 In the same manner as in Example 1, a dyed cloth for coating was obtained.

On the other hand, 15 parts of silicon dioxide particles (pore diameter: 25 Å, surface area: 700 m ² / g, average particle diameter: 3 μm) were added to 40 parts of ethyl acetate, and the mixture was stirred with a motor for 5 minutes. The silicon dioxide particle dispersion,
It was mixed with 100 parts of a polyurethane resin (30 parts of resin solid content), 2 parts of a crosslinking agent was mixed, and further stirred for 5 minutes to prepare a coating resin liquid. Next, the resin solution was coated on the above-mentioned dyed cloth with a knife coater and heat-treated to obtain a coated processed cloth having a coating amount of 6.5 g / m ² .

The average value of the aggregated silicon dioxide particles in the obtained coating resin film was 0.3 / cm ² , and the coating resin film had a good appearance. Further, the dye transfer stain fastness of this coated fabric was as good as grade 4-5.

Example 15 In the same manner as in Example 1, a dyed cloth for coating was obtained.

On the other hand, silicon dioxide particles (pore diameter: 25 Å, surface area: 700 m ² / g, average particle diameter:
(3.5 μm) 15 parts and 50 parts of ethyl acetate were added and mixed with 100 parts of an acrylic resin (20 parts of resin solid content) without previously mixing. Further, 2 parts of a crosslinking agent was added and stirred for 10 minutes to prepare a coating resin liquid. Next, this resin solution was coated on the above-mentioned dyed cloth with a knife coater and heat-treated to obtain a coated cloth having a coating amount of 6 g / m ² .

The average value of the aggregated particles of silicon dioxide in the obtained coating resin film was 1.0 / cm ² , and the coating resin film had a good appearance. Further, the dye transfer stain fastness of this coated fabric was as good as grade 4-5.

Example 16 In the same manner as in Example 1, a dyed cloth for coating was obtained.

After adding and mixing 50 parts of ethyl acetate with 100 parts of acrylic resin (20 parts of resin solid content), silicon dioxide particles (pore diameter: 25 Å, surface area: 700 m)
² / g, average particle size: 3.5 μm) were added and mixed. Further, 2 parts of a crosslinking agent was added and stirred for 10 minutes to prepare a coating resin liquid. Next, this resin solution was coated on the above-mentioned dyed cloth with a knife coater and heat-treated to obtain a coated processed cloth having a coating amount of 5.5 g / m ² .

The average value of the aggregated particles of silicon dioxide in the obtained coating resin film was 0.9 particles / cm ² , indicating a good appearance. Further, the dye transfer stain fastness of this coated fabric was as good as grade 4-5.

[0049]

According to the present invention, it is possible to stably provide a coated cloth excellent in dye transfer stain prevention property and appearance quality, and for clothing such as rain gappa and windbreaker, umbrella,
It can be suitably used as a material for bags and the like.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI D06M 15/643 D06M 5/12 15/21

Claims (4)

[Claims] 1. A polyester fiber fabric dyed with a disperse dye, having a dry coating resin film containing silicon dioxide particles having pores smaller than 150 angstroms and having a surface area of 500 m ² / g or more, and Coated fabric characterized in that silicon dioxide aggregated particles having an aggregated particle size of 300 μm or more in said coating resin film are 2 / cm ² or less. 2. The coated fabric according to claim 1, wherein the coating resin film is at least one selected from an acrylic resin, a polyurethane resin, a silicone resin, a vinyl chloride resin and a vinyl acetate resin. 3. Using a polar organic solvent having an affinity for the coating resin and the silicon dioxide particles, the coating resin and the silicon dioxide particles having a pore diameter of less than 150 angstroms and a surface area of 500 m ² / g or more. A process for producing a coated fabric, comprising dispersing silicon particles, and then dry-coating the resin solution onto a polyester fiber fabric dyed with a disperse dye. 4. The method according to claim 3, wherein the polar organic solvent is at least one selected from the group consisting of ethyl acetate, methyl ethyl ketone and a lower alcohol.