JP2002129487A - Polypropylene colored fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polypropylene colored fabric comprising polypropylene fibers and having a pattern, a letter, etc., colored in an optional tint and excellent durability and wear resistance. SOLUTION: This polypropylene colored fabric has a thin film layer of a low-melting polypropylene resin formed on a fabric comprising the polypropylene fibers and a pigment-impregnated layer formed on at least a surface layer part of the thin film layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a colored fabric made of polypropylene fibers.

[0002]

2. Description of the Related Art Polypropylene fiber is mainly used in the non-clothing field as a hydrophobic fiber, but it cannot be colored by ordinary dyeing processing using a dye. Coloring by kneading is used, so-called garments, but if the number of colors is unlimited, the complexity of switching colors during the manufacturing process, the need for stock of each color garment fiber, etc. make it expensive in terms of cost. In other words, there is a problem that only a polypropylene fabric having a simple color pattern with a limited number of colored fibers can be obtained.

Conventionally, as a method of obtaining such a colored fabric of polypropylene fiber without using the original fiber, there is a method of attaching a pigment to an arbitrary pattern with a binder resin such as a urethane resin on the polypropylene fabric. Colored fabrics are limited to applications where the colored surface lacks durability and abrasion resistance and do not require bending or friction, and do not take advantage of the excellent advantages of the polypropylene fibers themselves.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polypropylene-colored cloth which is made of polypropylene fibers, is colored in any desired pattern, characters, etc., and is excellent in durability and abrasion resistance.

[0005]

According to the present invention, a thin film layer of a low-melting polypropylene resin is provided on a cloth made of polypropylene fibers, and a pigment-impregnated layer is formed on at least a surface portion of the thin film layer. A polypropylene colored fabric.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a cloth made of polypropylene fibers may be a woven fabric, a knitted fabric or a nonwoven fabric made of polypropylene fibers of any known fineness and any thread form, or a raised cloth whose raised fibers are polypropylene fibers. Point to. In the present invention, the low-melting point polypropylene resin has a low degree of polymerization and a low molecular weight, while the polypropylene and the constituent monomer thereof are the same, and usually the melting point of the polypropylene forming the fiber is 160 to It refers to a polypropylene resin having a melting point of 70 to 100 ° C. while being 170 ° C.

In the present invention, the low-melting-point polypropylene resin thin film layer provided on the polypropylene fabric is a layer having a thickness of 0.01 to 1000 μm, and may be provided on the entire surface of the polypropylene fabric or may form a pigment-impregnated layer. It may be provided partially so as to correspond to the portion to be colored,
In addition, not only between the constituent fibers on the surface of the polypropylene fabric and between the constituent fibers, but also between the stitches when the fabric is a woven fabric, between the stitches when the fabric is a knitted fabric, or even inside the fabric.

In the present invention, pigment fine particles are dispersed in the low-melting-point polypropylene resin not on the surface of the low-melting-point polypropylene resin thin-film layer but on the entire low-melting-point polypropylene resin thin-film layer or on the surface layer of the thin-film layer. Pigment impregnated layer is formed. Accordingly, the maximum thickness of the pigment-impregnated layer is equivalent to the thickness of the low-melting-point polypropylene resin thin film layer, but depends on the thickness of the low-melting-point polypropylene resin thin film layer. Preferably, the thickness is at least 1/3 of the thickness from the surface side of the thin film layer of the low melting point polypropylene resin.

The pigment is not particularly limited, and may be other pigments as well as pigments which can be usually used for the production of spun fibers of polypropylene, or may be water-insoluble dyes. Since the portion where the pigment-impregnated layer formed using the pigment of any color is present becomes a colored portion expressing any pattern, character, etc., at least the surface layer of the low melting point polypropylene resin thin film layer is impregnated with the pigment. It is preferable that the layer is formed in a pattern, a character, or the like.

The method for producing the polypropylene colored fabric of the present invention will be described. The polypropylene colored fabric of the present invention is obtained by coating or printing a solvent dispersion of a low-melting polypropylene resin and a pigment on a fabric composed of polypropylene fibers, and performing a dry heat treatment. A method of fusing both solvents with a low-melting polypropylene resin thin film having a pigment-impregnated layer formed on a cloth, or coating a solvent dispersion of a low-melting polypropylene resin containing no pigment on a cloth made of polypropylene fibers, A solvent dispersion of the pigment is printed on the surface of the coat layer before the solvent is completely evaporated, and at least a part thereof is migrated into the coat layer, and both solvents are volatilized by dry heat treatment, and a pigment-impregnated layer is formed. Can be obtained by a method of fusing a low-melting point polypropylene resin thin film to a fabric.

The solvent dispersion of the low-melting polypropylene resin containing or not containing a pigment to be coated on the polypropylene fiber cloth is obtained by dispersing the low-melting polypropylene resin in a solvent, preferably an organic solvent such as toluene or ethyl acetate. The concentration of the low melting point polypropylene resin in the liquid is appropriately selected depending on the thickness of the thin film to be formed, means for coating, and the like. If necessary, a viscosity modifier is added to the solvent dispersion of the low-melting polypropylene resin.
A functional agent such as a light stabilizer can also be added.

As means for coating the solvent dispersion of the low melting point polypropylene resin, roll coating, knife coating, spray coating, gravure coating, rotary screen, auto screen, etc. are used, and a layer having a thickness of preferably 0.01 to 1000 μm is used. Coat. At the time of coating, the degree of penetration into the fabric can be changed by appropriately adjusting the viscosity and concentration of the solvent dispersion of the low-melting polypropylene resin, and a hard finishing effect can be imparted.

The solvent dispersion of the pigment used when the pigment is not contained in the solvent dispersion of the low melting point polypropylene resin may be any organic solvent, preferably the same solvent as used in the solvent dispersion of the low melting point polypropylene resin. It is dispersed in a single solvent or a mixed solvent containing a part thereof, and a sizing agent or another viscosity modifier is added. As a means for printing only the solvent dispersion of the pigment, gravure printing, screen printing, or the like is used, and the solvent dispersion of the pigment is printed on any pattern, character, or the like.

When printing a solvent dispersion of a pigment, it is necessary to print on the surface of the coat layer of the solvent dispersion of the low melting point polypropylene resin before the solvent is completely evaporated. When the solvent of the coat layer is completely evaporated, the low-melting polypropylene resin is formed into a film, which makes it difficult to migrate to the coat layer, and it is extremely difficult to form a pigment-impregnated layer on the surface of the low-melting polypropylene resin thin film layer. ,
Further, in a wet state in which the solvent of the coat layer has not evaporated at all, it is difficult to print itself, and it is only an extremely blurred pattern or character.

After printing the solvent dispersion of the low melting point polypropylene resin containing the pigment or the solvent dispersion of the pigment, it is preliminarily dried or immediately subjected to a dry heat treatment at 110 to 150 ° C. with a pin tenter or a calender roll. By this dry heat treatment, the solvent of the low-melting polypropylene resin solvent dispersion containing the pigment or the low-melting polypropylene resin solvent dispersion containing the pigment and the solvent of the pigment solvent dispersion are volatilized, and the formation of the low-melting polypropylene resin thin film layer and the formation of the thin film layer A pigment-impregnated layer is formed on the whole or on the surface of the thin film layer, and the low melting point polypropylene resin thin film is fused and fixed to the fabric.

The polypropylene colored fabric of the present invention has extremely good compatibility between the low melting point polypropylene resin constituting the thin film layer and the polypropylene resin of the fibers constituting the fabric, and the two are firmly adhered by fusion. In addition, since pigment particles are dispersed in the surface layer of the low-melting polypropylene resin thin film and are buried in the layer, coloring durability and abrasion resistance are extremely excellent. It does not occur such that it falls off, and it can also have a hard finishing effect.

Further, by mixing the urethane-based binder resin with the low melting point polypropylene resin constituting the thin film layer, it is possible to impart elasticity to the thin film layer, and it is possible to further improve the coloring durability and the wear resistance. Become. The elasticity-imparting effect is exhibited by using the low-melting-point polypropylene resin in combination with the low-melting-point polypropylene resin, in which the urethane-based binder resin having inherent elasticity is insufficient in the adhesiveness to the polypropylene fiber fabric and cannot exert the elasticity-imparting effect sufficiently. be able to.

[0018]

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

(Example 1) A filament yarn of 190 dtex / 60 filaments produced from polypropylene was used for warp and weft, and woven in a flat structure with a warp density of 20 / cm and a weft density of 18 / cm to form a woven fabric. did. A low melting point polypropylene 10 having a melting point of 100 ° C.
0 g and 3 g of a blue pigment in 10 ml of toluene (m
l) The dispersion obtained by adding to the above was printed in a pattern by a gravure roll coater printing method so as to form a colored layer having a thickness of about 1 μm, and was then dried and heat-treated at 120 ° C. for 1 minute with a pin tenter. Thermal fixation was performed.

The obtained woven fabric is a colored woven fabric having a blue pattern, and the durability and abrasion resistance of the woven fabric are determined by JI.
When an evaluation test (using a Gakushin-type testing machine, 200 g load, 100 times of friction) was conducted on the friction fastness in accordance with SL0849, it was confirmed that there was no abnormal change on the woven fabric surface and the abrasion resistance was sufficient. Further, the evaluation test was performed under a load of 500 g,
After rubbing 500 times, there was no abnormal change on the surface of the woven fabric and the durability was excellent.

Example 2 A dispersion obtained by adding 100 g of a low-melting polypropylene having a melting point of 100 ° C., 100 g of an aqueous urethane binder resin and 3 g of a blue pigment to 10 ml of toluene was added to the same polypropylene fabric used in Example 1. After printing in a pattern by a gravure roll coater printing method so as to form a colored layer having a thickness of about 1 μm, the film was dried and heat-fixed by a dry heat treatment at 120 ° C. for 1 minute using a pin tenter.

The obtained woven fabric was a colored woven fabric having a blue pattern portion. The durability and the abrasion resistance of the woven fabric were evaluated by the frictional fastness test in the same manner as in Example 1.
At a load of 00 g and friction of 100 times, there was no abnormal change on the woven fabric surface, and it was confirmed that the rubbing resistance was sufficient.
Even at a load of 00 g and friction of 500 times, there was no abnormal change on the woven fabric surface, and the durability was excellent.

Example 3 A dispersion obtained by adding 100 g of low-melting polypropylene having a melting point of 100 ° C. to 10 ml of toluene was roll-coated on the same polypropylene fabric as used in Example 1 so as to form a layer having a thickness of about 1 μm. Then, after air-drying so that the liquid does not adhere even if the coated surface is lightly touched with a finger, 3 g of a blue pigment is added to 10 ml of toluene, and a dispersion obtained by gravure printing is printed in a pattern form, and is then printed with a pin tenter. Dry heat treatment was performed at 120 ° C. for 1 minute.

The obtained woven fabric was a colored woven fabric having a blue pattern portion. The durability and the abrasion resistance of the woven fabric were evaluated by the frictional fastness evaluation test in the same manner as in Example 1.
At a load of 00 g and friction of 100 times, there was no abnormal change on the woven fabric surface, and it was confirmed that the rubbing resistance was sufficient.
Even at a load of 00 g and friction of 500 times, there was no abnormal change on the woven fabric surface, and the woven fabric was excellent in durability.

Comparative Example 1 An aqueous urethane binder resin 100 was added to the same polypropylene fabric used in Example 1.
g and 3 g of a blue pigment were added to 10 ml of water, and the resulting solution was printed in a pattern by a gravure roll coater printing method so as to have a thickness of about 1 μm.
Drying and heat fixation were carried out at 1 ° C. for 1 minute to carry out drying and heat fixing.

The obtained woven fabric was a colored woven fabric having a blue pattern portion.
An evaluation test was conducted in the same manner as in Example 1. As a result, the colored layer on the surface of the woven fabric was peeled off under a load of 200 g and rubbing 100 times, lacking abrasion resistance, and having no durability.

[0027]

The polypropylene-colored cloth of the present invention is colored in patterns, letters, etc. of any color, is excellent in durability and abrasion resistance, and can provide a hard finishing effect. Upholstery, tape, belt, strap,
It is suitable for use in fields where coloring of any color is required in various forms, such as bags, tonnoseats, blinds, and rugs. The main component of the polypropylene colored fabric of the present invention is polypropylene, which is advantageous in terms of recycling.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D06P 5/00 112 D06P 5/00 112 (72) Inventor Masuhisa Kodoko Ichima Temmabashi, Kita-ku, Osaka-shi, Osaka 8-30, Mitsubishi Rayon Co., Ltd. Osaka Branch (72) Inventor Hideo Tanaka 49 Umezu Kanda-cho, Ukyo-ku, Kyoto, Kyoto Prefecture Inside Tanaka Kinsei Kogyo Co., Ltd. (72) Inventor Yoshimatsu Kitagawa, Ukyo, Kyoto, Kyoto 49, Umezu-Kanda-cho, Tanaka Nakanaka Kinri Kogyo Co., Ltd. (72) Inventor Kenichiro Tanaka 49, Umezu-Kandacho, Ukyo-ku, Kyoto-shi, Kyoto F-term in Nakakin Kinri Kogyo Co., Ltd. BB39 BC22 BD01 DA13 DA30 4H057 AA01 BA81 DA01 DA18 GA04 JB01 4L049 AA06 AA16 AB11 BA21 BA38 BA39 DA26 EA00

Claims (3)

[Claims] 1. A colored polypropylene fabric, comprising a thin film layer of a low-melting polypropylene resin provided on a cloth made of polypropylene fibers, and a pigment-impregnated layer formed on at least a surface portion of the thin film layer. 2. The polypropylene colored fabric according to claim 1, wherein the pigment-impregnated layer is formed in a pattern or character shape. 3. The polypropylene colored fabric according to claim 1, wherein a urethane binder resin is mixed in the thin film layer of the low melting point polypropylene resin.