JP2001164465A - Antimicrobial fiber structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fiber structure having tenacity characteristics capable of sufficiently withstanding the practical use even after industrial washing and having excellent antimicrobial properties. SOLUTION: This antimicrobial fiber structure is characterized as binding a nitrogen-containing polyfunctional compound to cellulose molecules and stabilizing the compound and having antimicrobial properties of >0 sterilization activity value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial fiber structure obtained by imparting washing durability to a cellulose-containing fabric.

[0002]

2. Description of the Related Art Conventionally, fiber structures provided with antibacterial properties have been widely used for various kinds of clothing, interlining, lining, bedding products, interior products and the like. These fiber structures are not only excellent in antibacterial properties, but also improved in water washing durability at home by various measures.

Hitherto, for the antibacterial treatment of fibers, a method in which an inorganic antibacterial agent such as silver, copper or zinc is kneaded during the spinning of synthetic fibers, and a method in which an organic antibacterial agent such as a quaternary ammonium salt is sprayed or sprayed. Post-processing methods of applying by padding have been employed. The former case is excellent in terms of washing durability, but cannot be subjected to antibacterial treatment on products such as cloth. In addition, since the antibacterial agent precipitates as crystals on the surface of the spinneret at the spinning stage, there is a problem in yarn production such as frequent yarn breakage. On the other hand, in the latter case, although there is an advantage that a product such as cloth can be subjected to antibacterial processing, it is inferior in terms of antibacterial washing durability. There is also a method of firmly adhering or exhausting / diffusing to synthetic fibers, but there was no processing effect on a fabric containing no synthetic fibers or having a low mixing ratio.

[0004]

SUMMARY OF THE INVENTION In view of the background of the prior art, an object of the present invention is to provide an antibacterial fiber structure which is excellent even for a cellulose-containing fabric.

[0005]

Means for Solving the Problems The present invention has the following structure to solve the above-mentioned problems.

That is, a nitrogen-containing polyfunctional compound binds to cellulose and has a bactericidal activity value (unified test method: JIS L1).
902) is greater than 0.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has been studied diligently on the above-mentioned problem, that is, cellulose-containing fabrics exhibiting sufficient antibacterial properties even after washing with water. It has been found that such a problem can be solved by binding to a molecule.

In the present invention, the cellulosic materials include cotton, hemp,
A fabric containing natural cellulose fibers such as pulp and regenerated cellulose fibers such as viscose rayon. Polyester fibers such as polyethylene terephthalate, polypropylene terephthalate and polybutylene terephthalate, and polyamide fibers such as nylon 6 and nylon 66. , Polyolefin fibers such as polyethylene and polypropylene, protein fibers such as wool and silk,
It may be mixed with polyvinyl chloride fiber, vinylon fiber, acetate fiber or the like by blending, blending, weaving, weaving and the like.

[0009] The nitrogen-containing polyfunctional compound used in the present invention is a compound having nitrogen and two or more functional groups. Specifically, dimethylolethylene urea, methylated dimethyloluron, dimethylolpropyleneurea, dimethyloldihydroxyethyleneurea, 4-methoxy-5-dimethylpropyleneurea dimethylolated product, methylated trimethylolmelamine, dimethylolalkyltriazone , Dimethylol urea, hexamethylol melamine, tetramethylol acetylenediurea and the like. Particularly, a compound represented by the following general formula is preferably used.

[0010]

Embedded image

Here, R 1 and R ₂ are at least one group selected from —H, an alkyl group having 1 to 4 carbon atoms, and —CH ₂ OR 7. R3, R4, R5, and R6 are -H or-
A same or different group which is any of OR8. R
7, R8 is at least one group selected from -H and an alkyl group having 1 to 4 carbon atoms.

In the present invention, the bactericidal activity value uses a unified test method (JIS L1902) defined by SEK.

The cellulose content of the fabric used in the present invention is preferably 25 to 90% by weight. 25 content
When the amount is less than 90% by weight, the effect tends to be insufficient.

Next, an example of a method for producing the antibacterial fiber structure according to the present invention will be described.

A treatment liquid containing a nitrogen-containing polyfunctional compound is applied to a cellulosic fiber by a padding method, a dipping method, a spray method or the like.

Next, the nitrogen-containing polyfunctional compound is bonded to the cellulosic fiber by heat treatment.
This heat treatment temperature is preferably in the range of 80 to 220 ° C.

The nitrogen-containing polyfunctional compound used in this processing is stabilized by binding to cellulose molecules by heat treatment and exhibits bacteriostatic properties. However, the bactericidal activity value (Unified test method: JIS L1)
902) must be greater than zero. When the bactericidal activity value is smaller than 0, the antibacterial effect is insufficient.

In order to promote the reaction between the nitrogen-containing polyfunctional compound and the cellulosic fiber, it is also preferable to use a catalyst in combination, specifically, an organic acid, an organic amine salt, zinc nitrate, magnesium chloride. And metal salts such as zinc borofluoride, magnesium nitrate, and zinc chloride.

In the present invention, a softener or the like is used in combination for the purpose of improving the flexibility of the fabric, a water-absorbing agent or the like is used in combination for the purpose of improving the water absorbency, or a water repellent is provided for the purpose of imparting water repellency. It is also preferable to use a liquid agent or the like in combination.

The fibrous structure obtained by the present invention has excellent antibacterial properties and is suitably used for applications such as nursing clothing, sports clothing, bedding products, underwear, towels, dress shirts and uniforms. Is what is done.

[0021]

The present invention will be described in more detail with reference to the following examples. The evaluation in Examples and Comparative Examples was performed by the following method. [Washing method] Using a drum dyeing machine, Kao Corporation detergent "Zab" 2 g / l, hydrogen peroxide solution (35% industrial use) 3c
c / l, sodium percarbonate 1.5 g / l, temperature 85 ± 2
After washing at 15 ° C. and a bath ratio of 1:20 for 15 minutes, drainage, dehydration, and overflow washing were performed for 10 minutes. After that, dehydration was performed, and this was made one washing. Finally, it was dried using a tumbler dryer for 20 minutes. [Antibacterial test method] The test method is a unified test method (JIS L1
902), and MRSA clinical isolates were used as test cells. The test method is as follows. A bouillon suspension of the above test bacteria is poured into a sterile sample cloth, and the number of viable bacteria after culturing at 37 ° C. for 18 hours in a closed container is measured. According to the standards of

Under the condition of log (B / A)> 1.5,
g (A / C) is defined as the difference between the increase and decrease values of the number of bacteria, and the bactericidal activity value.
A value with a bactericidal activity value greater than 0 was regarded as a pass level.

Here, A is the number of bacteria recovered and dispersed immediately after inoculation of the unprocessed product, B is the number of bacteria recovered and recovered after 18 hours of cultivation of the unprocessed product, and C is the number of bacteria recovered and recovered after culturing the processed product for 18 hours. Represent. Example 1 Polyester 50 subjected to desizing, refining and bleaching by a conventional method
A wide woven fabric having a basis weight of 112 g / m ² consisting of 50% by weight of cotton and 50% by weight of cotton is used as a nitrogen-containing polyfunctional antibacterial agent in an aqueous dimethylolalkyltriazone solution (Beckamine LCR,
(Manufactured by Dainippon Ink, 20% solids) is immersed in a working fluid containing 70 g / l and magnesium chloride as a catalyst at 10 g / l. × 1 minute heat treatment. Table 1 shows the evaluation results. The content of cellulose was 50% by weight in the obtained fiber structure. Example 2 Polyester 24 subjected to desizing, refining, and bleaching by a conventional method
The same processing as in Example 1 was performed on a broad woven fabric having a basis weight of 105 g / m ^{2 and} consisting of 76 wt% of cotton and 76 wt% of cotton. Table 1 shows the evaluation results. The content of cellulose was 76% by weight in the obtained fiber structure. Example 3 Polyester 65 subjected to desizing, refining and bleaching by a conventional method
The same processing as in Example 1 was performed on a broad woven fabric having a basis weight of 150 g / m ^{2 and} comprising 35% by weight of cotton and 35% by weight of cotton. Table 1 shows the evaluation results. The content of cellulose was 35% by weight in the obtained fiber structure. Example 4 The same dough as in Example 1 was processed into a processing liquid containing 70 g / l of an aqueous dimethylol dihydroxyethylene urea solution (solid content: 20%) as a nitrogen-containing polyfunctional antibacterial agent and 10 g / l of magnesium chloride as a catalyst. It was immersed and processed in the same manner as in Example 1. Table 1 shows the evaluation results. Comparative Example 1 The same fabric as in Example 1 was evaluated without performing any treatment.
Table 1 also shows the evaluation results. Comparative Example 2 Benzethonium chloride (C ₂₇ H ₄₂ ClNO ₂ .H) was used as a quaternary ammonium salt-based antibacterial agent on the same fabric as in Example 1.
₂ O) (vinyl acetate as a solid content 30%) 50 g / l and a binder (50% solids) was immersed in the processing solution containing 30 g / l, were subjected to the same treatment as in Example 1. Table 1 also shows the evaluation results.

[0024]

[Table 1]

The products of Examples 1 to 4 have strong properties enough for practical use before washing and after 50 times of industrial washing.
And it has excellent antibacterial properties. On the other hand, in Comparative Examples 1 and 2, sufficient antibacterial properties were not recognized, and Comparative Example 3 was not practical in terms of strength. Comparative Example 4 has antibacterial properties at the beginning of washing, but is inferior in washing durability.

[0026]

According to the present invention, it is possible to provide a fibrous structure having strong properties enough to withstand practical use and excellent antibacterial properties even after industrial washing.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A41D 31/00 501 A41D 31/00 501J 502 502A 503 503B // D06M 101: 06 D06M 101: 06 (72) Inventor Koichi Saito 1-1-1, Sonoyama, Otsu-shi, Shiga Pref.

Claims (4)

[Claims] An antibacterial fiber structure characterized in that a nitrogen-containing polyfunctional compound binds to cellulose and has a bactericidal activity value (unified test method: JIS L1902) larger than 0. 2. The antimicrobial fiber structure according to claim 1, wherein the nitrogen-containing polyfunctional compound is a compound represented by the following general formula 1. Embedded image Here, R 1 and R 2 are —H, an alkyl group having 1 to 4 carbon atoms,
And at least one group selected from —CH ₂ OR 7. R3, R4, R5, and R6 are the same or different groups each of which is -H or -OR8. R7 and R8 are -H,
And at least one group selected from alkyl groups having 1 to 4 carbon atoms. 3. The fiber structure according to claim 1, wherein the content of cellulose is 25 to 25%.
The antibacterial fiber structure according to claim 1, which is 90% by weight. 4. Care clothes, sports clothes, bedding products,
The antibacterial fibrous structure according to claim 1 or 2, which is used for any use selected from underwear, towels, dress shirts and uniforms.