JP3248292B2 - Antibacterial modified fiber structure and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modified fiber structure having both ultraviolet shielding properties (hereinafter referred to as "UV-cutting properties") and antibacterial properties, as well as high safety and good texture. .

[0002]

2. Description of the Related Art Conventionally, as a method for simultaneously imparting UV-cutting properties and antibacterial properties, a method of kneading zinc oxide (ZnO) into fibers, a method of applying ZnO to a fiber surface with a resin binder, and the like are known. .

[0003] However, the former has the drawback that the application is limited to synthetic fibers, the spinning is difficult in terms of dispersibility, and the cost is high. At present, there is a drawback that adhesion is difficult and, above all, the texture becomes hard.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a modified fibrous structure which solves the above-mentioned drawbacks of the prior art and is excellent in UV-cutting properties and antibacterial properties and has a good texture. Another object of the present invention is to provide a method for producing a modified fiber structure that can easily impart the above-described performance to any fiber by post-processing.

[0005]

The present invention has the following configuration to achieve the above object.

That is, a γ-oryzanol derivative (Fe
An antibacterial property-modifying fiber structure characterized by having a except Lula acid) within the fiber surface portion and / or fibers.

Further, after immersing the fiber structure in a solution of a γ-oryzanol derivative (excluding ferulic acid) and drying,
A method for producing an antibacterial modified fiber structure, comprising heat-treating at a temperature equal to or higher than the melting point of the oryzanol derivative.

Further, the fibrous structure is immersed in a water emulsion to which an alcohol solution of a γ-oryzanol derivative (excluding ferulic acid) is added, and the bath is heated at a temperature not lower than the azeotropic point of the water emulsion. This is a method for producing an antibacterial modified fiber structure, which is characterized by intermediate treatment.

Hereinafter, the present invention will be described in detail.

The term γ-oryzanol derivative used in the present invention is a general term for γ-oryzanol isomers extracted from rice bran crude oil and rice germ oil and hydrolysates thereof, and is represented by the following formula (I): It is.

[0011]

Embedded image In the present invention, order to emphasize antibacterial performance, .gamma.-oryzanol isomer is used.

The fiber structure referred to in the present invention is a synthetic fiber such as polyamide, polyester or polyacryl, a natural fiber such as wool, silk, cotton, hemp, a semi-synthetic fiber such as acetate or rayon, or a mixture thereof. Fibers or fabrics such as woven or knitted fabrics made of these fibers.

In the present invention, the state in which the γ-oryzanol derivative is present in the fiber surface layer means the state in which the γ-oryzanol derivative exists so as to cover the surface of the single fiber, and the γ-oryzanol derivative is present inside the fiber. Has a state in which the γ-oryzanol derivative has been exhausted by the fibers.

Here, in applications where importance is placed on UV cut performance and durability, it is preferable that the fibers are exhausted inside the fiber. In applications where importance is placed on antibacterial performance, the modified fiber structure in the fiber surface layer portion is preferred. It is preferably an object.

In particular, in order to maintain both the UV-cutting property and the antibacterial property at a high level, it is preferable that the γ-oryzanol derivative be present both inside the fiber and on the fiber surface layer.

The modified fiber structure of the present invention can be obtained by immersing the fiber in a solution of a γ-oryzanol derivative, drying the fiber, and performing a heat treatment at a temperature equal to or higher than the melting point of the γ-oryzanol derivative. Examples of the solution include a solution in which the γ-oryzanol derivative is dissolved in a solvent such as alcohol, an emulsion obtained by mixing the solution with water, and a suspension in which the γ-oryzanol derivative is dispersed in water with a surfactant. Liquid and the like.

Here, it is important to perform the heat treatment at a temperature higher than the melting point of the γ-oryzanol derivative. When the heat treatment temperature is lower than the melting point, the γ-oryzanol derivative forms a white powder on the fiber surface, does not exist so as to cover the fiber surface, and is not exhausted inside the fiber. By performing a heat treatment at a temperature equal to or higher than the melting point, it is possible to obtain a modified fiber structure that the γ-oryzanol derivative has in the surface layer or inside the fiber.

When it is desired to obtain a modified fibrous structure having a γ-oryzanol derivative in the surface layer of the fiber, the melting point of the fiber is not less than the melting point.
The heat treatment is preferably performed at a processing temperature of (melting point + 5) ° C., and more preferably in a relatively short time. If you want to exhaust inside the fiber, its melting point or higher
It is preferable to perform the heat treatment at a temperature within (melting point + 30) ° C. for a relatively long time.

Further, the modified fiber structure of the present invention is obtained by immersing the fiber in a water emulsion obtained by adding an alcohol solution of a γ-oryzanol derivative, and immersing the fiber in a bath at a temperature not lower than the azeotropic point of the emulsion. It can also be obtained by processing. Among alcohols, aliphatic alcohols are preferable,
In particular, lower aliphatic alcohols such as methanol and ethanol are preferred.

In the case of this method, it is important to carry out the treatment in a bath at a temperature not lower than the azeotropic point of the alcohol and water constituting the emulsion. When the treatment temperature is lower than the azeotropic point, the composition ratio of the emulsion does not change due to boiling.Therefore, the γ-oryzanol derivative is stably present in the alcohol, and the fiber is not exhausted. It is considered that by performing the treatment, the ratio of water and alcohol in the emulsion changes, and the γ-oryzanol derivative becomes unstable in the bath, migrates to the fiber, and is exhausted.

In the in-bath treatment, almost all of the γ-oryzanol derivative is absorbed into the interior of the fiber, so that it is preferable for applications that emphasize durability.

[0022]

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

The antibacterial properties and UV cut rates in the examples were evaluated according to the following methods.

<Antibacterial Property> The antibacterial property was evaluated by a shake flask method, which is an evaluation test method for antibacterial and deodorant treatment of the Textile Sanitation Processing Council.

Test bacterium (Staphylococcus aureus St.
aphylococcus aureus IFO12732) was added, and the mixture was shaken at 150 times / min for 1 hour in a closed container. The number of viable cells after the shaking was counted, and the decrease rate of the added suspension to the number of cells was measured. The difference (%) was determined.

<UV cut rate> B-wave (about 280 to 320 nm) by a spectrophotometer (manufactured by Hitachi, Ltd.)
The UV cut rate was determined from the UV absorption of the A wave (about 320 to 400 nm).

The durability in the examples was evaluated by the above-mentioned method after washing according to the following method.

Detergent: Laundry synthetic detergent (weakly alkaline) 2 g / l “Zab No Phosphorus” (manufactured by Kao Corporation) is used.

Washing conditions: washing at 40 ° C. × 25 minutes—rinsing for 10 minutes—dehydration for 30 seconds—air drying The samples and chemicals used in the examples are as follows.

<Sample> Polyester taffeta Warp, weft: 75 denier, 36 filaments each Woven density: 98 × 84, yarn / inch Weight: 64 g / m ² Nylon taffeta Warp: 70 denier, 12 filaments Weft: 70 denier, 24 filaments : 123 × 87 horizontal / inch Weight: 64 g / m ² wool (Merino type quality No. 64) Woven density: 72 × 68 horizontal / inch Weight: 101 g / m ² Cotton (Kanakin No. 3) Warp: 30th weft : 36th count Weave density: 141 vertical × 135 horizontal / 5 cm Weight: 105 g / m ² <Drug> γ-oryzanol (manufactured by Oriza Yuka Co., Ltd.) Melting point 161.5 ° C Composition of saponified product (campesterol 21%, Stigmasterol 1%, sitosterol 20%, cycloartenol 17%, 24-methylenecycloartanol 4
1%) Ferulic acid (manufactured by Oriza Yuka Co., Ltd.), melting point 170 ° C

[0031]

Example 1 The above sample was immersed in a solution of 3% by weight of γ-oryzanol / ethyl alcohol, and mangle squeezed (squeezing pressure: 2 kg /
m2) 3 times, air-dried, and heat treated (185 ° C x 2 minutes)
Was carried out, and the adhesion amount, the UV cut rate, and the antibacterial property were evaluated.
Table 1 shows the evaluation results.

[0033]

Example 2 A 9% by weight solution of γ-oryzanol in methanol was mixed with water at a ratio of 1:
The same test as in Example 1 was performed using the mixture obtained in the ratio of 3. Table 1 shows the evaluation results. The evaluation results of the untreated fabric are also shown in Table 1 (Comparative Example 1).

[0035]

[Table 1] As shown in Table 1, those having the γ-oryzanol derivative (Examples 1 and 2 ) were superior in both antibacterial performance and UV cut performance as compared with the untreated cloth (Comparative Example 1). The fabric was effective irrespective of synthetic fibers or natural fibers.

[0036]

The polyester taffeta of the above sample was immersed in a 3% by weight ferulic acid / ethyl alcohol solution, mangled (drawing pressure: 2 kg / m 2) three times, and then heat-treated (treatment temperature and time are shown in Table 2). ) Was performed to evaluate the adhesion amount, the UV cut rate, and the antibacterial property. Table 2 shows the evaluation results. Examples 3 and 4 , Comparative Example 2 Using a 3% by weight of γ-oryzanol / ethyl alcohol solution, a solution of 3% by weight of ferulic acid in an ethyl alcohol solution was used .
Immerse the polyester taffeta of the above sample, mangle squeezing
(Drawing pressure: 2 kg / m2) 3 times, then heat treatment
(The processing temperature and time are shown in Table 2.)
The V-cut rate and antibacterial properties were evaluated . Table 2 shows the evaluation results.

[0038]

[Table 2] As shown in Table 2, those heat-treated at a temperature lower than the melting point of the γ-oryzanol derivative had no antibacterial properties and no UV-cut effect (Comparative Example 2 ) , whereas those heat-treated at a temperature equal to or higher than the melting point of the γ-oryzanol derivative. (Examples 3 to 4 ) were excellent in antibacterial properties and UV-cutting effects, and also excellent in washing durability. Further, the one subjected to the heat treatment at (melting point + 20 ° C.) (Example 4 ) had particularly good washing durability.

[0039]

[0040]

[0041]

Example 5 A 10% by weight solution of γ-oryzanol in methanol and water were mixed at a ratio of 1:10 to obtain a water emulsion. 25 cc of this water emulsion and 75 cc of water were mixed, and a sample shown in Table 3 was prepared.
g, put in the bath and adhered amount, UV cut rate,
The antibacterial properties were evaluated . The processing temperature is 130
℃, nylon 100 ℃, wool 100 ℃, cotton 100
C. for 60 minutes each. This evaluation
The results are shown in Table 3.

Comparative Example 3 For comparison, the same procedure as in Example 1 was conducted except that the processing temperature was set to 40 ° C. for all polyester, nylon, wool and cotton samples.
The test was performed as in Example 5 . Table 3 shows the results of these evaluations.
It was shown to.

[0044]

[Table 3] As shown in Table 3, a water emulsion prepared by adding an alcohol solution of a γ-oryzanol derivative and treated in a bath at a temperature equal to or higher than the azeotropic point (Example 5 ) is excellent in both antibacterial performance and UV cut performance. Was. The fabric was effective irrespective of synthetic fibers or natural fibers.

[0045]

The modified fiber structure obtained according to the present invention has excellent antibacterial properties and UV cut properties, and also has excellent washing durability. Further, it can be easily applied by post-processing, has high safety, and can be manufactured at low cost. Pharmacological effects are also widely recognized, such as senile xeroderma, various pityriasis, dryness associated with lichen pilaris and atopic dermatitis, fish vulgaris, various xeroderma, progressive finger palm angle Symptoms such as dermatosis can be reduced. As applications that show such effects, lingerie, underwear,
There are pantyhose, socks, etc. In addition, in outerwear, sportswear such as leotards, spats, swimwear, tennis wear, golf wear, supporters,
It can be used in a wide range of fields as medical materials such as gloves, garments for treating skin disorders and bandages.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-125668 (JP, A) JP-A-1-13016 (JP, A) JP-B 52-14293 (JP, B2) (58) Field (Int.Cl. ⁷ , DB name) D06M 13/00-13/535 C09K 3/00

Claims (3)

(57) [Claims] A γ-oryzanol derivative (excluding ferulic acid)
Antibacterial modified fiber structure of the Ku) and having inside the fiber surface portion and / or fibers. 2. A fiber structure comprising a γ-oryzanol derivative.
A method for producing an antibacterial modified fibrous structure, comprising immersing in a solution (excluding ferulic acid) , drying, and then heat-treating at a temperature equal to or higher than the melting point of the oryzanol derivative. 3. A fiber structure comprising a γ-oryzanol derivative.
An antibacterial modified fibrous structure characterized by being immersed in a water emulsion containing an alcohol solution (excluding ferulic acid) and treated in a bath at a temperature not lower than the azeotropic point of the water emulsion. Manufacturing method.