JP3265109B2 - Fiber with antibacterial function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber having an antibacterial function which can be widely used for clothing, towels, sports goods, air conditioner filters, sundry brushes, toothbrushes and the like.

[0002]

2. Description of the Related Art Attempts to impart antibacterial, antifungal, deodorizing, etc. functions to fibers (hereinafter simply referred to as antibacterial functions) have been made in the past, in which fibers are kneaded with an inorganic antibacterial agent. Is already known. As this kind of inorganic antibacterial agent, zeolite in which copper ions and silver ions are ion-exchanged is known, but fibers kneaded with these zeolite particles have a small antibacterial function and it is difficult to control the elution rate. In addition, the zeolite particles have disadvantages such as high hygroscopicity and poor processability and storage property.

The applicant of the present invention has developed a fiber into which a soluble glass containing silver ions has been kneaded as a novel fiber having an antibacterial function to solve the above-mentioned drawbacks, and has previously published Japanese Patent Application No. 1-263453. No. (Japanese Patent Publication No. 4-74453)
As suggested. However, fibers kneaded with soluble glass containing silver ions exhibit an excellent antibacterial function, but silver ions are reduced by the effects of heat during kneading into the resin or water or ultraviolet rays, resulting in blackening. A phenomenon of coloring was caused. As a result, it is not suitable for white clothing and sanitary goods in terms of appearance, and there is a problem that the use of fibers is greatly limited.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and can exhibit an excellent antibacterial function stably over a long period of time. The object of the present invention is to provide a fiber which is excellent and has an antibacterial function which can be applied to any use without changing the color under any production conditions or use conditions.

[0005]

The fiber having an antibacterial function of the present invention, which has been made to solve the above-mentioned problems, has a composition
A melt glass powder having a particle size of 10 μm or less containing 15 to 50 mol% of ZnO is added to a resin fiber material in an amount of 0.1 to 30% by weight.
And an initial elution rate of zinc ions of 2 μg / g / day or more.

[0006] The fusing glass used in the present invention refers to the physical property of the glass so as to have a controlled melting rate.
A generic term for glass whose composition is adjusted in consideration of chemical properties.Fusible glass containing zinc ions can elute zinc ions at a specified rate over any period from several hours to several years . The eluted zinc ions are adsorbed on the cell walls of the bacteria and microorganisms or condensed in the cell membrane and inhibit the growth of the bacteria and microorganisms by the so-called oligodynamic action, thereby exhibiting an antibacterial function.

In order to elute zinc ions at a predetermined rate as described above, the soluble glass must be made of SiO ₂ , P ₂ O ₅ ,
It is necessary to contain at least one of B ₂ O ₃ . In the composition of the melting glass, ZnO
It is necessary to add 15 to 50 mol%. In the case of zinc, unlike monovalent silver ions, this is an intermediate oxide that forms a network forming ion in glass, and its elution rate is extremely slow. Therefore, in order to exert a sufficient antibacterial function, it is 15 mol% as ZnO. This is because it is necessary to add the above, and on the other hand, it is difficult to vitrify at 50 mol% or more.

In the present invention, such a soluble glass is kneaded into a resin fiber material as a powder having a particle size of 10 μm or less. The kneading is carried out at the stage of preparing a master batch as shown in Examples described later, and thereafter, the fiber is spun by a conventional method. Here, the particle size of the melting glass is 10 μm
The reason for the following is to increase the specific surface area because the elution rate of zinc ions is low as described above, and to exhibit a sufficient antibacterial function. In addition, the reason why the amount of the soluble glass added is set to 30% by weight or less of the resin fiber material is that this is enough to exhibit the antibacterial function, and that if too much soluble glass powder is mixed in, the properties of the fiber are reduced. Is less than 0.1% by weight, because the effect is low. Furthermore, the fiber of the present invention preferably controls the initial elution rate of zinc ions to 2 μg / g / day or more. If the dissolution rate of zinc ions is less than this range, a sufficient antibacterial function is not exhibited.

The fibers of the present invention as described above can be widely used for clothing, towels, sports goods, air conditioner filters, household sundry brushes, toothbrushes, etc.
In any case, upon contact with water, zinc ions are gradually eluted at a constant rate from the soluble glass powder kneaded into the fiber, exhibiting an excellent antibacterial function. Moreover, unlike conventional silver ions, there is no reduction or coloring by heat, ultraviolet rays, or the like. For this reason, textile products using the fiber of the present invention are not only sanitary due to antibacterial, antifungal and deodorizing effects, but also well matched to modern customs that emphasize cleanliness, and colored. It can be applied to any product without any change.

[0010]

【Example】

First Embodiment A. First Embodiment Creating antimicrobials First, B ₂ O ₃ 46.6 mol%, SiO ₂ 15.6 mol%, Na ₂ O
A zinc ion-containing boric acid soluble glass having a composition of 7.8 mol% and Zn ₂ O of 30 mol% was prepared and pulverized to a particle size of 5 μm or less. As Separately comparative example to this, P ₂ O _{5 5}
A silver ion-containing phosphoric acid-soluble glass having a composition of 0 mol%, MgO 44 mol%, Al ₂ O ₃ 6 mol%, and Ag ₂ O 2 wt% was prepared, and similarly, pulverized to a particle size of 5 μm or less, A powder of the contained zeolite was prepared. B. Preparation of Fiber Next, a masterbatch containing 20% of each antibacterial agent in 6-nylon was prepared, and the masterbatch and 6-nylon were mixed so that the antibacterial agent content was 0.2%, 0.5%, 1% pellets. Next, the obtained pellet was spun and drawn by a conventional method to obtain a 2d yarn, and the yarn was knitted into a tube to obtain a test piece. For comparison, 1% each of silver ion-containing soluble glass and silver-containing zeolite particles were used as antibacterial agents.
A similar test piece was prepared using the contained pellets (the former was referred to as Comparative Example 1 and the latter as Comparative Example 2). C. Antibacterial effect Next, 0.75 g of these three kinds of cloths and the cloth of the comparative example
75 ml of phosphate buffer containing 10 ⁴ cells / ml E. coli
After shaking at 25 ° C. for 1 hour, the viable cells were cultured on an SCD agar medium and examined for the reduction rate of Escherichia coli. The results shown in Table 1 were obtained. In addition, the same measurement was performed also in the case of the cloth which performed washing 10 times.

[0011]

[Table 1] D. Elution of metal ions 1 g of the nylon cloth of Examples 1 to 3 was added to 10 ml of water, and
Table 2 shows the results of measuring the amount of zinc ion eluted with an atomic absorption apparatus after 24 hours at ° C.

[0012]

[Table 2] E. FIG. Discoloration test Various discoloration tests were performed using the cloths of Example 3 and Comparative Examples 1 and 2, and the results were as shown in Table 3. It was confirmed that no discoloration occurred in the example.

[0013]

[Table 3] (○: no discoloration, ×: discoloration)

Second Embodiment A. First Embodiment Preparation of antibacterial agent B ₂ O ₃ 20 mol%, SiO ₂ 50 mol%, Na ₂ O 10 mol%, Zn
A zinc ion-containing borate glass having a composition of 20 mol% of O was prepared and pulverized to a particle size of 5 μm or less. As a comparative example
B ₂ O ₃ 20 mol%, SiO ₂ 70 mol%, Na ₂ O10 mol%, Ag
A silver ion-containing phosphoric acid glass having a composition of 0.5% by weight of ₂ O was prepared and pulverized to a particle size of 5 μm or less. B. Preparation of fiber Next, the antimicrobial agent content in the acrylic polymerization stock solution was 1%, 1.5%.
%, Then spinning by wet spinning and washing with water.
After drying, a clamp treatment and a wet heat treatment were performed to obtain raw cotton for a test piece. For comparison, a similar test piece was prepared by adding 1% of silver ion-containing soluble glass as an antibacterial agent. C. Antimicrobial effect Next, when the reduction rate of Escherichia coli was examined for these two kinds of cloths and Comparative Example in the same manner as in Example 1 above, the results shown in Table 4 were obtained. In addition, the same measurement was performed also in the case of the cloth which performed washing 10 times.

[0015]

[Table 4] D. Elution of metal ions 1 g of the nylon cloth of Examples 4 to 6 was added to 10 ml of water, and
Table 5 shows the results obtained by measuring the amount of zinc ion eluted with an atomic absorption apparatus after 24 hours at ° C.

[0016]

[Table 5] E. FIG. Discoloration test Various discoloration tests were carried out using the cloths of Example 4 and Comparative Example 3. The results are as shown in Table 6, and it was confirmed that those of the examples did not cause any discoloration.

[0017]

[Table 6] (○: no discoloration, ×: discoloration)

[0018]

As is apparent from the above description, the present invention imparts an excellent antibacterial function to fibers by kneading a predetermined amount of a powder of a soluble glass containing zinc ions into a resin fiber material. It can exhibit a stable antibacterial function over a long period of time, and since the melted glass powder is kneaded into the fiber, there is no danger of falling off compared to when it is attached to the outer surface And better stability can be obtained. Furthermore, it can be applied to any use without changing the color under any production conditions or use conditions. Therefore, the present invention greatly contributes to industrial development as a fiber having an antibacterial function that has eliminated the conventional problems.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D01F 1/00-6/94 A01N 59/00-59/26

Claims (2)

(57) [Claims] 1. A resin glass material containing 15 to 50 mol% of ZnO and having a particle size of 10 μm or less is kneaded into a resin fiber material at a ratio of 0.1 to 30% by weight, and 2 μg / g is added. / day
A fiber having an antibacterial function, characterized by having the above-mentioned initial elution rate of zinc ions. 2. The method according to claim 1, wherein the soluble glass is SiO ₂ , P ₂ O ₅ , or B ₂ O ₃ .
Characterized by containing at least one kind
The fiber having an antibacterial function according to claim 1.