JP2838331B2 - Anti-bacterial yarn for socks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn for socks having an antibacterial property, and more particularly to a stocking, which solves problems such as prevention of yellowing, continuation of antibacterial action, and reduction in strength. It is suitable as a material for socks with high fashionability such as pantyhose and tights.

[0002]

2. Description of the Related Art Conventionally, a dissolving glass that elutes copper ions and silver ions is blended with a fiber material, and sterilization, antibacterial, bacteriostatic,
As a technique for imparting each function such as deodorization, for example, a technique disclosed in Japanese Patent Application Laid-Open No. Hei 1-213410 is known.

[0003] Such known examples include polyamides, aramids,
Various fibers such as polyester, vinylon, rayon, etc.
Network-forming oxides such as O ₂ , B ₂ O ₃ and P ₂ O ₅ , or Na ₂ O, K ₂ O, CaO, MgO, BaO, Al
At the time of spinning, an antibacterial agent obtained by adding a metal compound that releases copper and silver ions such as Cu ₂ O, CuO and Ag ₂ O to a melting glass made of a network modifying oxide such as ₂ O ₃ , TiO ₂ and ZnO. Such a function is imparted by adding or attaching by spinning or the like after spinning.

[0004]

However, in the prior art, problems such as yellowing of the fiber due to the antibacterial agent, sustainability of the antibacterial effect, and strength of the antibacterial agent depend on the composition and manufacturing conditions. In particular, polyamide fibers such as nylon 6, nylon 66, etc., have problems such as coloration of yarn and discoloration when left in a natural environment when kneaded with resin.

On the other hand, in women's socks made of such polyamide-based fibers, in recent years, thinner and more transparent materials have been pursued in order to make women's legs look beautiful.
As the fineness of the yarn further increases, it is not uncommon to use an ultrafine yarn of 15 denier or less. Further, from the viewpoint of aesthetic appearance, the necessary function is that there is no unnecessary coloring of the yarn, or that the color tone does not change over time. In addition, it is necessary to maintain a certain level of strength or more even during fine knitting, at the time of knitting and at the time of wearing, and it is also an important issue from the viewpoint of application that the texture is not reduced. However, as such a raw yarn for socks, in particular, the selection of an antibacterial agent based on its use and the specialty of the material, and the provision of a material that satisfies this from the viewpoint of maintaining strength, preventing discoloration, texture, etc., as well as application. Was required. The present invention provides a novel sock raw yarn which has not satisfied the above points and the above-mentioned requirements.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a composition of a fiber having an antibacterial activity by a soluble glass, wherein the composition ratio is 49 to 51 mol% of P ₂ O ₅ ,
0.1 to 0.7% by weight of Ag ₂ O is blended into a melting glass containing 43 to 45% by mole of MgO and 5 to 7% by mole of Al ₂ O ₃ , and the particle size thereof is 5 μm or less, more preferably 1% or less.
The present invention relates to the provision of a raw yarn for socks characterized by comprising an antimicrobial soluble glass powder having a particle size of not more than micron in a range of 0.5 to 3.0% by weight based on polyamide fiber.

[Action]

The composition and function of the dissolving glass having antibacterial properties constituting the present invention will be described. As described above, a phosphoric acid-based dissolving glass is mainly used, and magnesium oxide and aluminum oxide are mixed with this. In order to release antimicrobial ions from the resulting soluble glass, silver oxide is added. The composition of such a fusing glass is:
When this is added to the resin, or yellowing due to external conditions and the like after the addition, it is important in preventing discoloration, for this purpose, the compounding ratio is generally as described above Desirably within the range.

[0008] Such a soluble glass is adjusted to a particle size of 5 µm or less, more preferably 1 µm or less by an appropriate method such as pulverization or the like. To 3.0% by weight and uniformly dispersed to constitute the yarn of the present invention.

The particle size and the amount of the soluble glass are based on the premise that the water-soluble glass having the antibacterial property constituting the present invention is used.
The range is set in the above range from the viewpoint of maintaining strength and feeling. That is, the fact that the particle size is larger than the above-mentioned range and the amount of addition thereof is larger causes poor yarn quality, unevenness of the yarn surface, reduced strength and the like, and also causes higher cost. On the other hand, when the amount is small, problems occur in the antibacterial effect and the sustainability.

[0010] In the present invention, such conditions have been particularly specified in recent years for special applications such as socks for finer and more fashioned socks and fine deniers of 50 denier or less, particularly 30 denier or less. The reason is that polyamide-based fibers for socks such as nylon 6 or nylon 66 are used as the target material.

At the time of spinning, various additives usually used, for example, stabilizers against heat, light and the like, or smoothing agents, plasticizers, antioxidants, thickeners and the like are added in appropriate amounts. These may be added in an appropriate range, or they may be uniformly dispersed in pellets before spinning.
The spinning conditions, namely, melting, extrusion, drawing,
Various conditions such as cooling, heat treatment, relaxation, and the shape of the spinneret are arbitrary, and the yarn obtained thereby is a monofilament or a multifilament yarn.
Alternatively, it is used as a raw yarn for socks after being subjected to a crimped bulk processing.

Hereinafter, the present invention will be described specifically with reference to examples.

Example 1 In melt spinning a nylon 6 polymer, P ₂ O ₅ 5 whose particle size was adjusted to 5 μm or less.
0 mol%, MgO 44 mol%, Al ₂ O ₃ 6 mol%, A
An antibacterial soluble glass powder having a composition of 0.5% by weight of g ₂ O was uniformly blended at 1.5% by weight with respect to the polymer weight, and melt-spun to obtain a 35 denier nylon yarn of the present invention. Table 1, Table 2, Table 3, and Table 4 show the evaluation of the yarn and the results of knitting a stocking using the yarn and confirming the effect.

[0013]

[Table 1]

[Table 2]

[Table 3]

[Table 4]

Table 1 shows the evaluation of the physical properties of the yarn, Table 2 shows the evaluation of the antibacterial property of the knitted fabric, Table 3 shows the evaluation of the discoloration of the knitted fabric under various environments, and Table 4 shows the evaluation of the discoloration of the knitted fabric under various environments. Indicates whiteness, yellowing degree, and fluorescence intensity depending on the knitted fabric. In each table, the control group 1 had an average particle size of the soluble glass of 10 microns and the amount of addition was 0.5% by weight, and the control group 2 had an average particle size of the soluble glass of 5 microns and the addition amount. 4.0% by weight, control section 3 is an antibacterial nylon thread of Company T containing an antibacterial agent obtained by adsorbing zeolite on silver ions, and control section 4 is silver and copper ions adhering to zeolite. K antibacterial processed nylon yarn containing the antibacterial agent, which was evaluated.

Hereinafter, the evaluation method will be described. Table 1
, The strength, elongation, and elongation recovery were measured by JIS measurement methods, and elongation recovery indicates the maximum resistance value at 15% constant elongation. (Average value of 10 measurements n) The antibacterial properties in Table 2 were evaluated as follows. (Average value of 10 measured n) <Test method> Bacteria count method <Test strain> Staphylococcus aureus IFO
12732 <Test method> A bouillon suspension of a test bacterium was poured into a sample to be inspected, and the number of cells produced after culturing in a closed container at 37 ° C for 18 hours was counted to obtain an increase / decrease value with respect to the number of cells inoculated. Further, in order to check the durability of such an effect, washing was repeated 10 times using a home washing machine, and the evaluation was obtained.

Evaluation 1 in Table 3 was evaluated when left for 4 days in direct sunlight, Evaluation 2 was assumed to have a water content of 100%, and evaluation 3 when left for 4 days in direct sunlight was evaluated for water content. 1
The degree of discoloration when left under a high-pressure mercury lamp for 2 hours was determined by gray scale. (Average value of 3 measured n)

Table 4 shows the degree of whiteness, the degree of yellowing, and the intensity of fluorescence, and the measurement was performed as follows. Whiteness: C.I. I. EL ^* . a ^* . b ^* Hunter whiteness was calculated using a color system. Yellowing degree: Calculated by Hunter's formula as described above. Fluorescence intensity: A measured value at a wavelength of 400 to 700 nanometers, each of which was measured by Macbeth colorimeter 2020 Plus. The term "after washing 10 times" refers to an evaluation after repeating the washing 10 times using a home washing machine in order to observe a change due to washing. (Average value of 3 measured n)

[0018]

As is clear from the evaluation by the above examples, the present invention solves the problems such as yellowing, discoloration and the like, which were disadvantages of the prior art, and also has an antibacterial effect and its antibacterial effect. It was also excellent in sustainability. Furthermore,
No decrease was observed in terms of strength and the like. Further, when the surface of the yarn was observed with an electron microscope, no extreme roughness was observed, and the yarn was not sufficiently impaired in knitting and texture. As described above, the present invention has an excellent function as a raw yarn for socks.

Continuation of the front page Judge Katsutoku Ishii Judge Ayako Nishimura Judge Yoshio Sugano (56) References JP-A-1-213410 (JP, A) JP-A-2-104712 (JP, A) JP-A-1- 249702 (JP, A)

Claims (1)

(57) [Claims] 1. The composition ratio of P ₂ O ₅ is 49 to
Ag ₂ O is added to a melting glass containing 51 mol%, MgO of 43 to 45 mol%, and Al ₂ O ₃ of 5 to 7 mol%, and 0.1 to 25 mol%.
An antibacterial soluble glass powder having a particle size of 0.7 μm or less and a particle size of 5 μm or less, more preferably 1 μm or less, is contained in an amount of 0.5 to 3.0% by weight with respect to the polyamide fiber. An antibacterial sock yarn characterized by the following characteristics.