JPH0424258A - Nonwoven fabric having antimicrobial and antimycotic function - Google Patents

Abstract

PURPOSE:To obtain the title nonwoven fabric useful as sanitary materials, etc., having excellent processing properties and shelf stability, by adding soluble glass to synthetic resin yarn or a bondable component of nonwoven fabric or incorporating both the yarn and the bondable component with the soluble glass. CONSTITUTION:Synthetic resin yarn (e.g. polyester) or a bondable component (e.g. urethane) of nonwoven fabric is incorporated with soluble glass (amount of soluble glass added is preferably 0.1-30wt.% based on weight of nonwoven fabric; particle diameter is preferably >=25mmu) or both the yarn and the bondable component are blended with the soluble glass and the soluble glass is mixed with an antimicrobial and antimycotic component (e.g. silver or copper).

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a nonwoven fabric having an antibacterial and antifungal function that can be widely used in clothing interlining, filters, sanitary materials, daily necessities, and the like.

(Conventional technology) Conventionally, organic nonwoven fabrics with antibacterial and antifungal functions have been used.
Diphenyl ether-based, chlorhexidine-based, thiobendazole-based, etc.), inorganic-based (ion-exchanged silver or copper zeolite, copper powder, etc.) substances with antibacterial and anti-fungal functions are kneaded into synthetic resin. Fibers made from these materials were used to make non-woven fabrics, or antibacterial pile agents were applied to non-woven fabrics in post-processing.

However, these products had the following drawbacks.

■When kneading organic antibacterial pile agent into synthetic resin,
Since it is necessary to heat the product to around 200 degrees Celsius, the antibacterial pile agent decomposes and evaporates, resulting in a poor working environment and lack of uniformity in the product.Volatilization is also observed in products that are exposed to heat during use.

■When applying organic antibacterial pile agent in post-processing,
It had the same drawbacks as the above item (■).

■When kneading inorganic antibacterial pile agent into synthetic resin,
In particular, pile performance is weak (when using zeolite type,
Due to its hygroscopic nature, processability and storage have been difficult.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems, namely, the problems caused by volatilization and decomposition due to heating of organic antibacterial pile agents, and the problems with pile machine properties of inorganic antibacterial pile agents. The purpose of this project is to solve the problems of zeolite-based antibacterial piles, such as processability and kidney retention due to their hygroscopic properties.

Therefore, it was completed with the aim of solving the above problems.

(Means for Solving the Problems) In order to solve the above problems, the present invention uses synthetic resin fibers containing soluble glass, or includes soluble glass in the adhesive component of a nonwoven fabric. Alternatively, a nonwoven fabric having antibacterial and antifungal functions containing soluble glass in both the fibers and the adhesive component is completed.

In the present invention, the synthetic resin that can be used is any material that can be molded into a fiber shape, such as nylon, polyester, rayon, polypropylene, vinylon, acrylic, or polyvinyl alcohol.

The amount of soluble glass added varies depending on the particle size, but when the particle size is 50 μm or less, it is preferably in the range of 0.1 to 30 wt% (per weight of nonwoven fabric).

The antibacterial pile components to be included in the soluble glass are preferably silver, copper, and zinc.

Antibacterial pile machine components (silver, copper,
The elution amount of zinc) is 1 to 5000 n in distilled water at 20°C.
In the range of g/cm (/day), favorable results were obtained by inhibiting the proliferation of bacteria through oligocynamy action.

Organic solvent adhesive components such as urethane, acrylic, synthetic rubber latex, and melamine emulsion can be used as the fiber adhesive component (binder) for making the nonwoven fabric.

The particle size of the soluble glass used varies depending on the conditions of use, but when kneaded into a synthetic resin, it needs to be 50 μm or less, preferably 25 μm or less, and when added to a binder, it should be slightly coarse particles. The thickness may be 65 μm or less, but preferably 25 μm or less.

Next, examples will be shown to clarify the present invention.

(Example ■) The basic composition is 5i0225% (mo1% or less is the same),
820365%, Na2010% glass with 0.5% silver added, and glass with the same basic composition with Cu2 added.
O3 weight? δ, 2 with soluble glass containing 3% by weight of ZnO
Different types of soluble glass were made and each was crushed to a size of 25 μm or less.

These two types of soluble glass were each added at 5% by weight to low-density polyethylene and kneaded, and short fibers of low-density polyethylene (
Fiber length 5-30+n+n, fineness 5d, softening point approximately 120℃
) were created.

Similarly, polyester short fibers (fiber length 5 to 2011
Two types of LII+1 (fineness 10 d, softening point approximately 210°C) were also created.

50% by weight of natural bulbs, 30% by weight of silver-containing soluble glass-added polyester short fibers, and 20% by weight of low-density polyethylene short fibers were dispersed in water using a papermaking machine to make paper. Furthermore, it was heat-pressed (at about 150°C) using a calendar roll machine, and then heat-treated at 190°C for 1 minute to obtain a nonwoven fabric with a basis weight of 30-35 g/-.

Similarly, a nonwoven fabric using fibers containing soluble glass containing copper and zinc was also created.

25 cm of this nonwoven fabric was taken and immersed in 50 cc of water at 20° C. for 24 hours, and the elution amount of Ag ions, Cu ions, and Zn ions was measured. The results are shown in Table 1 below.

Table 1 Elution amount of silver, copper, and zinc Next, the antibacterial effect was confirmed by the bacterial count measurement method in the test method for evaluating the processing effect of sanitary processed products stipulated by the Textile Products Sanitary Processing Council. The results are shown in Table 2.

Table 2 Bacterial count measurement results (Example ■) Non-woven fabric made by heat-sealing commercially available nylon (fabric weight 380 g/j
)It was used.

Soluble glass <P2O565io1%, Ca015111
01%Na2014mo1%, A1203611101
% basic glass composition, glass with 201.0 wt% of Ag added was crushed into two types of 20 μm or less and 54 μm or less> into urethane-based water-soluble emuldimine (containing an anionic dispersant) so as to be 5 wt/vol.1 g. In addition to,
A suspension was created.

A nonwoven fabric was immersed in a tank of this liquid to absorb it, squeezed with a roll under pressure, dried, and then thermally bonded at 140°C for 30 minutes to create a nonwoven fabric with a piling machine function.

Amount of attached soluble glass, elution amount of silver, amount of peeling (non-woven fabric 25
cn? was immersed in water at 20°C for 24 hours, and the amount of silver in the water and the amount of silver in the precipitated glass was measured by atomic absorption. The results are shown in Table 3.

Table 3 Amount of silver eluted, Amount of peeling Next, using blue mold, potato dextrose agar After culturing for 25 days on medium for one week, growth inhibition zone Observed.

The results are shown in Table 4 below. Ru.

Table 4 Status of growth inhibition zone (Example ■) Soluble glass <B20B2O38O%S iOS102l0% Nap) 10io1% basic glass composition with Ag200.
Acrylic short fiber kneaded with 1% by weight (fiber length 50-7)
01III11 fineness 3d) was created.

The web was created with a random web forming device and with a needle punch density of about 2 N/ctj in a two-dollar rocker.
A nonwoven fabric with a weight of approximately 560 g/Wj was produced.

This non-woven fabric 250I+? was soaked in 50 cc of water at 20°C for 24 hours, and the amount of silver eluted was measured.
It was 0 ng/c+J/day.

Next, this product was tested in the textile product section (dry method) of JIS Z2911r Mold Resistance Test to confirm its effectiveness. The results were as shown in Table 5 below.

(Example ■) Soluble glass <B20345mo1%Si○240mo1
%Na2O15mo1% Ag200.
5% by weight added) was made into short fibers (i1i! diameter 5-10μm, length 20-120no) by flame blowing method.
I made it.

This glass fiber and conventional fibers were blended as shown in Table 6 below, and a web was created using a random web forming device.
It was fused by heat treatment (190°C, 1 minute) and finished into a nonwoven fabric.

This nonwoven fabric 25c+J was immersed in 50 cc of water at 20° C. for 24 hours, and the amount of silver eluted was measured.

The results were as shown in Table 7 below.

The effect was confirmed by testing in the textile product section (dry method) of the ``Strength Test''. The results were as shown in Method 8 below.

(Effects of the Invention) As is clear from the above explanation, the nonwoven fabric containing soluble glass of the present invention has a structure in which the soluble glass having an antibacterial and antifungal function is combined with other organic and inorganic antibacterial pile components. It is more stable than other glass, and its antibacterial and antifungal function can be varied depending on the composition (both the composition of soluble glass and the amount added).

Therefore, the present invention is practically useful and contributes to industrial development.

Claims (1)

[Claims] Antibacterial and anti-fungal properties using synthetic resin fibers containing soluble glass, or by incorporating soluble glass into the adhesive component of a nonwoven fabric, or by containing soluble glass in both the fibers and the adhesive component. A nonwoven fabric with