JP2007098327A - Fiber-woven fabric having photocatalytic function and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiber-woven fabric having a photocatalytic function which has a deodorizing property of removing a bad smell of sweat or urine and an antibacterial property and in which yellowish traces to be formed from sweat or urine can be destroyed; and to provide a method for manufacturing the fiber-woven fabric having the photocatalytic function. <P>SOLUTION: The fiber-woven fabric having the photocatalytic function is characterized in that silver zeolite, zinc oxide and silicon dioxide are stuck to the fiber-woven fabric by a binder resin. It is preferable that the amount of silver zeolite to be stuck to the fiber-woven fabric is 0.03-1%owf, that of zinc oxide to be stuck is 0.1-1%owf and that of silicon dioxide to be stuck is 0.01-0.1%owf. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a fiber cloth having a photocatalytic function capable of eliminating a bad smell of sweat and urine, and capable of erasing traces even if sweat or urine soaks into the fiber cloth and forms a yellowish trace.

  In recent years, awareness of hygiene and cleanliness has increased, and demands for functions such as deodorizing, antibacterial, and antifouling have increased in various fields. Particularly in the field of clothing, there is a great demand for wearing directly on the body. For example, inner wear and outer wear using fibers that deodorize bad smell even when sweating are often used.

  Common sources of malodor include ammonia odor in urine, acetic acid odor in sweat, isovaleric acid odor in foot mussels, rotten hydrogen sulfide odor in eggs, trimethylamine odor in fish, rotten methyl mercaptan odor in vegetables, etc. And deodorizing with a substance having a deodorizing performance with a deodorizing effect on each deodorizing component.

  That is, as a method for eliminating the above-mentioned various bad odors, a method of chemically neutralizing and decomposing the odor-causing substance, a method of using a fragrance to mask human odor, etc. are mainly used. However, this does not work directly on the substance that causes odors and cuts off the odor source, but it does not feel the smell by spraying it in the living space.

In addition, as a deodorizing process for textiles such as clothing, a deodorant or an antibacterial agent fixed to the fiber surface with a binder (for example, Patent Document 1), a deodorant or an antibacterial agent is kneaded inside the fiber. (For example, Patent Document 2).
JP-A-63-135512 JP-A-2-289148

  However, the thing fixed to the fiber surface with the binder of the said patent document 1 has the problem that a deodorizing agent peels off by repeated washing and a deodorizing function falls. On the other hand, the material kneaded inside the fiber of Patent Document 2 is excellent in durability and suitable for long-term use, but cannot induce a chemical reaction with the origin of odor, and it is an odor component by neutralization or decomposition. It was impossible to remove the odor, and it was impossible to bring out the effect of the deodorizing function itself.

  In recent years, it has been proposed to generate active oxygen using the photocatalytic function, and to remove not only deodorant and antibacterial but also dirt with this active oxygen. When a yellowish trace was generated on the cloth, the trace could not be erased, and there was a problem that it was difficult to erase the trace due to erasing by washing.

  The present invention has been researched and developed to solve the above problems, and has a deodorant and antibacterial property that eliminates bad odors of sweat and urine, and the yellowing of the fabric that sucks sweat and urine. An object of the present invention is to provide a fiber cloth having a photocatalytic function capable of disappearing a trace and a method for producing the same.

  As a means for solving the above problems and achieving the object, in the present invention, a fiber cloth having a photocatalytic function, characterized in that silver zeolite, zinc oxide and silicon dioxide are fixed to the fiber cloth by a binder resin. Developed and adopted.

  Further, the fiber cloth having the photocatalytic function configured as described above has a component adhesion amount of silver zeolite of 0.03 to 1% owf (under the condition that the drawing rate is 100% in the padding process), and the component of zinc oxide. A fiber cloth having a photocatalytic function having an adhesion amount of 0.1 to 1% owf and a silicon dioxide component adhesion amount of 0.01 to 0.1% owf was developed and adopted.

  Further, the method for producing a fiber cloth having a photocatalytic function according to the present invention is characterized in that the processing agent is attached to the fiber cloth by dipping in a processing agent treatment solution containing silver zeolite, zinc oxide, silicon dioxide, and a binder resin. Developed and adopted a method for manufacturing fiber fabrics with photocatalytic function.

  The present invention has an antibacterial effect by suppressing the proliferative growth of microorganisms, particularly staphylococcus aureus, which is a resident bacterium of the skin and odor, by the action of silver ionized by natural ion exchange action by silver zeolite. Become clean and hygienic. In addition, the odorous component is sucked into the micropores of the zeolite, and it is a natural ore, but acts as an ion exchange resin, and the deodorizing effect becomes stronger due to the neutralization and decomposition of the odorous components inside the micropores. In particular, the deodorizing effect of ammonia (urine) and acetic acid is great.

  Furthermore, the photocatalytic action of zinc oxide and silicon dioxide works, decomposition of proteins and other organic compounds in urine occurs, and it has not been achieved so far by chemically changing the yellow pigment bilirubin to colorless and transparent cyclobilirubin. The dirt and yellowing of traces of impure waste caused by sweat and urine can be eliminated.

  Moreover, the amount of silver zeolite adhering to the fiber cloth is 0.03% to 1% owf, the amount of zinc oxide being 0.1 to 1% owf, and the amount of silicon dioxide being 0.01 to 0 .1% owf adherence and critically defined, interrelated with each other, avoiding the negative effect of the photocatalyst's strong oxidizing action on the fiber cloth, and has a deodorizing and antibacterial effect over a long period of time In addition to the dirt and yellowing of traces of impure waste due to sweat, urine, etc., can be achieved.

  The silver zeolite used in the present invention is a fine powder in which silver is supported by ion exchange on zeolite (zeolite) made of an aluminosilicate which is a porous material of an alkali or alkaline earth element, and an odor component is contained in the fine pores of the zeolite. At the same time, the odor components are neutralized and decomposed inside the micropores by ion exchange to exert a deodorizing effect.

  It is preferable that a mixed solution of 30% aluminosilicate (silver zeolite) and 70% water is blended in the processing agent treatment liquid at a blending amount of 1 to 30 g / liter. If it exceeds 30 g / liter, the concentration will become excessive, causing a chemical reaction peculiar to silver, causing the fabric to yellow, red or darken over time, resulting in a loss of the original quality of the fiber material, resulting in poor appearance. Become. On the other hand, when the addition concentration is less than 1 g / liter, the function of removing bad smells of sweat and urine is lowered.

  Zinc oxide used in the present invention is known to have an energy band structure similar to that of titanium oxide, titanium dioxide, etc., and is excellent in photocatalytic function. A photocatalyst is not a light catalyst but a catalyst that begins to work when light strikes it. It is a catalyst that works by the energy of light. It absorbs light and enters a high-energy state, giving that energy to a reactant and causing a chemical reaction.

  Zinc oxide, which has a photocatalytic function, generates active oxygen from oxygen and water in the air in the presence of light from the sun or illuminating lights, and decomposes germs in the air with this active oxygen to remove malodors and yellowing stains. be able to. In addition, zinc oxide is used because it is cheaper and more economical than titanium oxide, and because it has low oxidizing power, it hardly damages the fiber cloth and has excellent miscibility with silicon dioxide.

  A mixed solution of 24% zinc oxide, 3% polyoxyalkyl ether, 3% silicon dioxide, and 70% water is blended in the processing agent treatment liquid at a blending amount of 20 to 40 g / liter. If it exceeds 40 g / liter, the oxidizing power becomes too strong, which may affect the dyeing property of the dye on the fiber cloth, or may lead to embrittlement of the fiber cloth itself. It is not suitable because the ability to erase traces of sweat and urine yellowing is reduced.

Although silicon dioxide used in the present invention is mainly used as a dispersion stabilizer, not only the function thereof but also zinc oxide can be supported on the porous surface, the fiber cloth is not made brittle, and the fiber cloth is used. By attaching and drying, it exhibits a binder effect, and further synergistic effects with the acrylic silicon resin binder work, zinc oxide is firmly fixed, and it does not peel off during washing and maintains a photocatalytic function over a long period of time it can.

Silicon dioxide is preferably blended in the processing agent treatment liquid at a blending amount of 30 g / liter. If it exceeds 30 g / liter, the texture of the fiber cloth becomes too hard to be suitable, and if it is 30 g / liter or less, the effect as a dispersion stabilizer is reduced and the bonding force is weak, which is not suitable.

  The binder resin used in the present invention may be water-resistant, and examples thereof include acrylic resins, urethane resins, vinyl chloride resins, vinyl alcohol resins, vinyl acetate resins, and the like. Any binder resin may be used as long as the strength and adhesiveness are good. The binder resin is preferably blended in the processing agent treatment liquid at a blending amount of 40 g / liter.

  As the fiber cloth of the present invention, synthetic fibers such as polyester, polyamide, polyacryl, polypropylene, polyvinyl chloride, and polyvinyl alcohol, semi-synthetic fibers such as acetate and rayon, wool, silk, and cotton can be selected depending on the binder resin used. Natural fibers such as hemp can be used.

  The component of urine is water that is 96% ingested by beverages or metabolized carbohydrates, and urea that is biosynthesized in the liver based on ammonia that is formed by protein metabolism in the remaining 4% , Solids such as uric acid, creatinine, ammonia, urobilin are included. It is a yellow pigment component called bilirubin made in the gallbladder that urine is light yellow or yellowish brown. The smell of urine is generated when urea is exposed to air and decomposed into ammonia.

  The reason why the stains and yellowing of traces of urine and sweat can be eliminated is that the photocatalytic reaction by zinc oxide causes degradation of proteins and other organic compounds in the urine, and at the same time chemically changes bilirubin pigment to colorless and transparent cyclobilirubin. I can guess.

  For odorous substances such as ammonia, the light is not always exposed to light such as at night due to adsorption decomposition within the micropores of silver zeolite, and sodium, potassium, chlor, and calcium phosphate present in trace amounts. Even in this case, it will help to absorb and remove large amounts of bacteria and substances.

Specific examples of the present invention will be described below.
Example 1
A mixed treatment solution of finely divided zinc oxide, silicon dioxide, and polyoxyalkylene ether 30 g / liter, an aluminosilicate-containing aqueous solution (trademark: Zeomic, manufactured by Sinanen Co., Ltd.) 1 g / liter, and an acrylic silicon resin 40 g / liter It poured into a beg, and a fiber cloth made of 100% cotton smooth knitted fabric (40/1 smooth) was dyed and picked up by the padding method, and the processing agent was adhered to the fiber cloth. Then, it was dried at 105 ° C. for 2 minutes and subsequently heat treated at 140 ° C. for 3 minutes to obtain a fiber cloth of the present invention. The component adhesion amount of the fabric cloth processing agent obtained by the above formulation was fine particle zinc oxide 0.72% owf, silicon dioxide, polyoxyalkylene ether 0.09% owf, aluminosilicate 0.03% owf. .
(Example 2)

Example 1 was the same as Example 1 except that the aqueous solution containing aluminosilicate of Example 1 was 5 g / liter. The component adhesion amount of the fiber cloth was fine particle zinc oxide 0.72% owf, silicon dioxide, polyoxyalkylene ether 0.09% owf, aluminosilicate 0.15% owf.
(Example 3)

The same procedure as in Example 1 was performed except that the aqueous solution containing aluminosilicate of Example 1 was changed to 10 g / liter. The component adhesion amount of the fiber cloth was fine zinc oxide 0.72% owf, silicon dioxide, polyoxyalkylene ether 0.09% owf, aluminosilicate 0.30% owf.
Example 4

Example 1 was the same as Example 1 except that the aqueous solution containing aluminosilicate of Example 1 was 20 g / liter. The component adhesion amount of the fiber cloth was fine zinc oxide 0.72% owf, silicon dioxide, polyoxyalkylene ether 0.09% owf, aluminosilicate 0.60% owf.
(Example 5)

The same procedure as in Example 1 was performed except that the aqueous solution containing aluminosilicate of Example 1 was 30 g / liter and the mixed solution of fine zinc oxide, silicon dioxide and polyoxyalkylene ether was 5 g / liter. The component adhesion amount of the fiber cloth was 0.12% owf of fine particle zinc oxide, 0.015% owf of silicon dioxide, polyoxyalkylene ether, and 0.90% owf of aluminosilicate.
(Comparative Example 1)

Daiwa Chemical Industries, Ltd. (Trademark: New The Oberset LEK) deodorant functional processing agent liquid was poured into the begg in the same manner as in Example 1 and 100% cotton smooth knitted fabric (40/1 smooth) fiber. The fabric was obtained through the same process as in Example 1.
(Comparative Example 2)

The antibacterial and deodorizing functional processing agent solution manufactured by Daiwa Chemical Industry Co., Ltd. (Trademark: Amorden MCM) was poured into the begg in the same manner as in Example 1, and a 100% cotton smooth knitted fabric (40/1 smooth) fiber cloth A fiber cloth was obtained through the same process as in Example 1.

Various performance evaluation results obtained as described above are shown below.
Recipe Dirt Discoloration Antibacterial Ammonia Acetic acid Isovaleric acid Example 1 △ ○ ○ ○ ◎ ◎
Example 2 〇 〇 〇 ◎ ◎ ◎
Example 3 ◎ 〇 〇 ◎ ◎ ◎
Example 4 ◎ 〇 〇 ◎ ◎ ◎
Example 5 △ △ 〇 △ 〇 〇 Comparative example 1 × 〇 〇 〇 ◎ ◎
Comparative Example 2 × ○ ○ × × ×
Blank No Yes No No No No
The dirt evaluation in the above is
After immersing a fiber cloth 5 cm × 15 cm in a container containing 100 cc of urine, it was taken out and sun-dried under sunlight for 3 hours, and the degree of disappearance of urine yellowness was visually observed.
◎; No stains are seen
〇; No stains are seen
Δ: Stain stain is faintly seen
X: Discoloration evaluation in which many stains and stains were observed was carried out by a light fastness test, a jungle performance test and a sun exposure test.
; Light fastness test Fade meter used
63 ° C x 5 hours; Jungle performance test method
After leaving in a constant temperature and humidity chamber at 70 ° C. and 90% RH (relative humidity) for 3 days and 7 days, take it out and check for any discoloration.
; Sunlight exposure test method Leave under sunlight for 3 days to check the degree of discoloration.
〇 ； No discoloration
Δ: Slightly pink discoloration antibacterial evaluation
Antibacterial performance test JISL1902 Bacterial fluid absorption method
〇; Bacteriostatic activity value 2.2 or more Deodorant evaluation is
Deodorization performance test Instrument measurement JAFET method; Ammonia, acetic acid Reduction rate (%) = {(AB) / A} x 100
A = measured value of blank test
B = measured value of sample; reduction rate of isovaleric acid (%) = {(C−D) / C} × 100
C = Peak area of blank test
D = peak area of sample ◎; deodorization rate 90% or more
○: Deodorization rate 80% ~ 90%
Δ: Deodorization rate 70% -80%
×: Fails when the deodorization rate is 70% or less

The main embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the gist of the present invention. is there.

  Effectively used in a wide range of fields such as innerwear and outerwear clothing, nursing products such as diapers and diaper covers, bedding such as mattresses, pillows, cushions, and various covers, and interior items such as curtains and carpets. Is.

Claims (3)

  A fiber cloth having a photocatalytic function, wherein silver zeolite, zinc oxide, and silicon dioxide are fixed to a fiber cloth by a binder resin.   Adhesion amount of silver zeolite on fiber cloth is 0.03 to 1% owf, adhesion amount of zinc oxide is 0.1 to 1% owf, adhesion amount of silicon dioxide is 0.01 to 0.1% owf The fiber cloth having a photocatalytic function according to claim 1. A method for producing a fiber cloth having a photocatalytic function, wherein the fiber cloth is immersed in a processing agent treatment solution containing silver zeolite, zinc oxide, silicon dioxide, and a binder resin to attach the processing agent to the fiber cloth.