JP2005290612A - Functional textile product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excellent textile product having excellent touch without oxidizing a fiber material or a binder even when a photooxidation catalyst is fixed. <P>SOLUTION: The textile product is obtained as follows. An alkali-disintegrable type hydrophilic polymeric material (8) containing either one or both of collagen (6) and an amino acid (7) is dispersed in a solution (5) consisting essentially of water. A treating liquid (2) comprising the resultant emulsion (9) as a dispersion medium and the photooxidation catalyst (3) as a dispersoid is applied and dried to thereby fix the photooxidation catalyst (3) onto the fiber material (4). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a functional fiber product having an antibacterial, antifouling and deodorizing function by fixing a photocatalyst to a material, and more particularly to a functional fiber product suitable for use in underwear.

  In recent years, titanium dioxide has attracted attention as a photo-oxidation catalyst because it has a catalytic function of decomposing pollutants such as organic compounds in the atmosphere under ultraviolet irradiation, and it has also been reported that it has a deodorizing antibacterial action at the same time. .

Specifically, when titanium dioxide is irradiated with ultraviolet rays, water and oxygen contained in the air are decomposed to generate active oxygen (OH ⁻ , O ²⁻ ) on the surface.
And by the action of this active oxygen, it is possible to oxidize and decompose pollutants in the atmosphere, to decompose odor components and deodorize them, or to kill bacteria.

Paying attention to such a photo-oxidation catalytic function of titanium dioxide, attempts have been made to impart antibacterial, antifouling and deodorizing functions by fixing titanium dioxide to textiles.
First, in Patent Document 1, titanium dioxide supporting silver is fixed on the fiber surface without using a binder at the time of dyeing, so as to have a photooxidation catalyst function without impairing the texture of the fiber.
JP-A-10-280270

In addition, as shown in Patent Document 2, it has also been attempted to firmly fix titanium dioxide to the fiber by coating the fiber surface with a coating material containing titanium dioxide in an inorganic binder.
JP-A-11-61652

  However, since titanium dioxide has a very strong photo-oxidation catalytic function, there is a problem in that it not only decomposes bacteria, dirt and odor adhering to the fiber product, but also oxidizes and decomposes the fiber product and the resin itself.

In addition, when a white paint containing titanium dioxide is directly applied to the wall surface, the wall surface is chalked and becomes so-called choking, so that non-choking treatment is performed on the particle surface with a hydrate such as Al ₂ O ₃ or SiO _2. The technology to apply is known.
Patent Document 3 proposes that this technology is applied to textile products, and that titanium dioxide particles are contained in aluminosilicate particles to prevent oxidation of the resin and fibers. In this way, non-choking treatment is performed. The function of the applied titanium dioxide as a photocatalyst becomes extremely weak.
Japanese Patent Laid-Open No. 11-76835

  That is, when fixing titanium dioxide to a textile product, if it is fixed directly, the textile product itself is oxidized, and if mixed with a binder, the binder is not only oxidized, but also due to the coating of the binder. There is a problem in that the texture of the fiber product is impaired and the touch becomes poor, and when the non-choking treatment is applied, it does not function as a photocatalyst.

  Therefore, the present invention has a technical problem to provide a fiber product in which the fiber material and the binder are not oxidized even when the photo-oxidation catalyst is fixed, and the touch is extremely good.

  In order to solve this problem, the functional fiber product according to the present invention is obtained by dispersing an alkali-dissolving hydrophilic polymer material containing one or both of collagen and amino acids in a solution containing water as a main component. The photooxidation catalyst is fixed to the fiber material by adhering and drying a treatment liquid using the emulsion thus prepared as a dispersion medium and the photooxidation catalyst as a dispersoid.

According to the present invention, for example, when a treatment liquid is attached to a textile product such as an underwear and dried, fleshing occurs from the surface layer side as the moisture contained in the emulsion evaporates, and the photooxidation catalyst is exposed on the surface layer. It is fixed in the state.
Even if dirt is attached by wearing this underwear, if it is selected and dried, it will be exposed to sunlight, so the photocatalytic action will kill bacteria, remove the dirt, and eliminate the odor Become.

Here, a coating film of an alkali-dissolving hydrophilic polymer material is formed between the photooxidation catalyst and the fiber product, and the individual photooxidation catalyst particles are not in direct contact with the fiber product. Moreover, the alkali-dissolving hydrophilic polymer film formed by evaporating the water contained in the emulsion is strong and has acid resistance, so that it is not oxidized by the active oxygen produced by the photo-oxidation catalyst. Therefore, the film did not peel easily and lasted for a long time, was excellent in washing resistance, and the effect could be maintained even when selected 50 times or more.
In particular, when an organic substance is contained as the alkali-dissolving hydrophilic polymer material, a stronger resin film is formed when moisture is evaporated.
Further, since either or both of collagen and amino acid are contained in the emulsion, the moisture retention is extremely high, and the skin feels moist and very comfortable.

  In this example, the problem of providing a fiber product in which the fiber material and binder are not oxidized even if the photo-oxidation catalyst is fixed, and the touch is very good, is solved with an alkaline solution containing either or both of collagen and amino acids. This was realized by forming a film of type hydrophilic polymer material between the photo-oxidation catalyst and the textile product.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view showing a functional fiber product according to the present invention.

  The functional fiber product 1 shown in FIG. 1 is used as an underwear that directly touches the skin. After sewing is completed, titanium dioxide 3 that becomes a photo-oxidation catalyst by post-processing is immersed in the fiber. Fixed to the material 4.

  The treatment liquid 2 uses, as a dispersion medium, an emulsion 9 in which an alkali-dissolving hydrophilic polymer material 8 containing one or both of collagen 6 and amino acid 7 is dispersed in a solution 5 containing water as a main component, In this, powdered or liquid titanium dioxide 3 is dispersed at a concentration of about 10%.

The solution 5 used for the emulsion 9 may be a case where water is the main component and only water is used, or an aqueous solution in which a water-soluble additive or the like is dissolved may be used.
The alkali-dissolving hydrophilic polymer material 8 dispersed in the solution 5 includes one or both of an alkali-dissolving hydrophilic organic polymer material and an alkali-dissolving hydrophilic inorganic polymer material. Used.

  Alkali-dissolving hydrophilic organic polymer materials include water-based polyester resins made hydrophilic by introducing hydrophilic groups such as carboxyl groups, as well as water-repelling any organic polymer materials such as acrylic resins and urethane resins. Can be used.

  In addition, as the alkali desolubilizing hydrophilic inorganic polymer material, in addition to natural polymers such as seaweed extract, substances generally used as stabilizers such as natural polymer derivatives and synthetic polymers can be used.

  The natural polymers include agar, carrageenan, fercelan, alginic acid and other seaweed extracts, locust bean gum, guar gum, tamarind gum, gum arabic, tragacanth gum, karaya gum, pectin, arabinogalactan, soy protein, wheat protein, raw starch Lipids such as soybean lecithin, xanthan gum, pullulan, dextran, gelatin, casein, albumin and egg yolk lecithin can be used.

  Furthermore, as the natural polymer derivative, starch systems such as phosphosan starch and carboxymethylated starch, and cellulose systems such as microcellulose, hydroxyethylcellulose, and carboxymethylcellulose can be used.

  Furthermore, as the synthetic polymer, polyvinyl alcohol, polyvinyl methyl ether, polyacrylic acid, polyethylene oxide, polyethylene glycol, or the like can be used.

Table 1 shows a composition example of the emulsion 9 serving as a photooxidation catalyst dispersion medium used for the treatment liquid 2 (2A to 2E).
In the case of this example, the treatment liquids 2A to 2E include pure water, ethylene glycol monotertiary butyl ether (CH ₃ C (CH ₃ ) ₂ O.CH ₂ CH ₂ OH) as an additive, and an alkali-dissolving hydrophilic type. A water-soluble polyester resin that is a water-soluble organic polymer material, carrageenan that is an alkali-dissolving hydrophilic inorganic polymer material, collagen, and an amino acid (in this example, glycine) are mixed in the following ratio to obtain a glass transition point. Emulsion 9 having a temperature of −10 ° C. or lower (−25 ° C. in this example) was purified.

Each of the treatment liquids 2A to 2E is produced by mixing about 10% of titanium dioxide 3 having a particle size of 5 nm to 50 nm as a dispersoid, using these emulsions 9 as a dispersion medium, and stirring them sufficiently. Was used.
The smaller the particle size, the better. However, it is not only problematic in terms of production technology and manufacturing cost, but it is difficult to handle as a powder, and therefore 5 nm or more is preferable.
Further, if it exceeds 50 nm, the formed film 10 may have a rough feeling depending on the dispersion state, and therefore, 50 nm or less is preferable.
Then, when the treatment liquids 2A to 2E are attached to the untreated fiber material 4 and sufficiently dried to the treatment liquids 2A to 2E and sufficiently dried, the coating 10 with the alkali-dissolving hydrophilic polymer material 8 as a binder on the surface. Is formed into the textile product 1.

The above is a configuration example of the coating material according to the present invention and the photooxidation catalyst solution used therefor, and the operation thereof will be described next.
In the dry state, the film 10 is thinned by evaporation of moisture, and as shown in FIG. 1, a film in which the particles of titanium dioxide 3 are exposed on the surface layer is formed.
Collagen 6 ... and amino acids 7 ... are dispersed in the coating 10, and since they have a high moisturizing effect, they have a moist and comfortable touch and are optimal for use in textile products such as underwear that directly touch the skin. .

Then, after being worn, this is washed and exposed to irradiation with sunlight or illumination light containing ultraviolet rays, so that the moisture H ₂ O and oxygen O ₂ contained in the air are exposed from the coating layer 8. When they are touched, they are decomposed by photocatalytic action, and active oxygen OH ⁻ and O ²⁻ are generated on the surface layer.
Therefore, contaminants such as bacteria, dirt, and odor components that have adhered to the surface layer and did not fall off by washing are oxidatively decomposed into water and carbon dioxide by active oxygen having a high oxidizing ability, and the bacteria are sterilized. Odor components are decomposed and deodorized.
At this time, the titanium dioxide 3 is dispersed and held in the alkali desolubilizing hydrophilic polymer 8 excellent in acid resistance, and since the fiber material 4 is not directly touched, the fiber product 1 is not oxidized, Further, the alkali-dissolving hydrophilic polymer 8 that forms the coating 10 is not oxidized.

In addition, since the film 10 made of the alkali desolubilizing hydrophilic polymer 8 is strong, it does not peel off from the fiber material by washing, and the same effect as before washing is obtained even after 50 washing tests. In particular, the film made of the alkali desolvation type hydrophilic polymer 8 containing water-based polyester was strong and after 100 washing tests, the same effect as before washing was recognized.
In addition, the above-described good touch, antibacterial / antifouling / deodorizing effect, and washing resistance were the same regardless of which of the treatment liquids 2A to 2E was used.

As described above, according to the present invention, even if the photooxidation catalyst is fixed, the fiber material and the binder are not oxidized, and it is possible to provide a very excellent effect that it is possible to provide a fiber product that has a very good touch.
Of course, the present invention is not limited to application to underwear, but can be widely provided to textile products in general.

  As described above, the present invention is optimal for applications such as underwear that require not only antibacterial, antifouling, and deodorizing functions, but also good touch.

Explanatory drawing which shows the textiles which concern on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Functional fiber product 2 Processing liquid 3 Titanium dioxide 4 Fiber material 5 Solution 6 Collagen 7 Amino acid 8 Alkali desolubilization type hydrophilic polymer material 9 Emulsion 10 Coating

Claims (4)

  A treatment liquid in which an emulsion in which an alkali-dissolving hydrophilic polymer material containing one or both of collagen and amino acid is dispersed in a solution containing water as a main component is used as a dispersion medium, and a photooxidation catalyst is used as a dispersoid. A functional fiber product in which the photo-oxidation catalyst is fixed to the fiber material by adhering and drying the material.   The functional fiber product according to claim 1, wherein the photooxidation catalyst is titanium dioxide.   The functional fiber product according to claim 2, wherein a particle diameter of the titanium dioxide is 5 nm or more and 50 nm or less. The functional fiber product according to claim 1, wherein the emulsion has a glass transition point of -10 ° C or lower, preferably -20 ° C or lower.

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