JPS59112071A - Imparting of permanent sterilization property to fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing permanently sterilizing fibers in which a poorly water-soluble sterilizing agent is fixed to the surface layer of Luca fibers.

Conventionally, we have applied germicidal properties to carpets, mats, sheets, curtains, and futons to prevent the infection of pathogens in hospitals and other sanitary fields, and to socks and tights to prevent odor. Various methods of imparting bactericidal properties are being studied, but their bactericidal properties are not long-lasting, and although they exhibit excellent effects immediately after processing, they have the disadvantage that the bactericidal effects are lost due to repeated washing, etc. There is a strong demand for the development of textile products with permanent bactericidal properties.

The present inventors conducted intensive research2 in order to meet the above-mentioned needs.As a result, the poorly water-soluble bactericide 2.4Z,4t'-)lichlor-'-hydroxydiphenyl ether exhibits an excellent bactericidal effect and has a high affinity with fibers. Despite the fact that the disinfectant is extremely large and difficult to attach to the fibers because it is poorly water-soluble, the disinfectant can be easily dispersed in water and has a boiling point lower than that of water. The present inventors have discovered that by dispersing the disinfectant into fibers and treating the fibers while boiling the solvent, the disinfectant can adhere well to the fibers and impart excellent permanent disinfectant properties to the fibers.

That is, the present invention provides an emulsified dispersion aqueous treatment liquid containing co, l, q'-trichloroco'-hydroxydiphenyl ether and a solvent having a boiling point below the boiling point of water that can dissolve the compound and stably disperse it in water. The gist of this invention is a processing method for imparting permanent bactericidal properties to fibers, which is characterized by treating the fibers at a temperature equal to or higher than the boiling point of the solvent.

Bactericide used in the present invention 2. Although it has excellent bactericidal properties, it is a poorly water-soluble bactericidal agent that is solid at room temperature (melting point 56c) and causes almost no chemical harm to the human body.

In order to impart permanent bactericidal properties to the fibers, it is preferable that the amount of the bactericide adhered to the fibers is in the range of 0.0/-/0% owf. If the amount of adhesion is less than 00/%owf, it is difficult to provide sufficiently high permanent bactericidal properties, and even if it exceeds IO%owf, no further improvement in bactericidal properties is seen, and the texture of the fibers tends to be impaired. As the solvent having a boiling point lower than water, for example, methyl alcohol, ethyl alcohol, n-propyl alcohol, acetone, THF, methyl ethyl ketone, etc. can be used. The amount of solvent is preferably - to 70 times the amount of the disinfectant, provided that the disinfectant can be emulsified and dispersed and an aqueous treatment solution that is stable at room temperature can be prepared. The reason why a solvent having a boiling point lower than that of water is used is that the treatment can be carried out under conditions where the solvent boils and the evaporation rate of the solvent is higher than that of water.

The permanent bactericidal property imparting process of the present invention is carried out by the good cure method, bad stain A method, and sufu' L using ordinary fiber finishing machines.
In addition to the q-near method and the exhaustion solid layer method using a dyeing processing machine, permanent sterilization imparting processing is also possible in the finishing process of raw cotton yarn production.

The processing temperature needs to be higher than the boiling point of the solvent. When immersing an emulsified dispersion, it is preferable to do it at a temperature below the boiling point of water; this does not necessarily mean that below 100C is a bad practice, but if it is daytime the boiling point of water in the atmosphere (and pressure) during processing. good.

The processing temperature depends on the boiling point of the solvent, but is usually between θ and 1zoC.
, the time is preferably in the range of several tens of seconds to several tens of minutes.

If the treatment is carried out above the astigmatism point of the solvent, the balance of the emulsified dispersion aqueous liquid will be disrupted due to evaporation of the solvent, and the dispersion ability of the disinfectant in the emulsion will decrease, and this, combined with the fact that the disinfectant has a good affinity for fibers, will result in sterilization. It is thought that permanent bactericidal properties are imparted by selectively adsorbing and bonding the agent to fibers.

Such a phenomenon is unique to the method of the present invention and is not observed when fibers are treated with an emulsified dispersion aqueous treatment solution prepared using a conventional dispersant.

Further, for example, when fibers are impregnated with an emulsified dispersion and sterilization imparting processing and drying are performed simultaneously, the process is naturally carried out at a temperature higher than the boiling point of water.

While the method of the present invention provides excellent permanent sterilizing properties, sterilizing agent 2. Using an emulsifying and dispersing aqueous treatment solution consisting of da, da'-trictetraloco'-hydroxydiphenyl ether 02%off and a high boiling point dispersant llyoxyethylene sorbitan monostearate lS%owf, acrylic fibers were processed at a bath ratio of i:so. , qgC for 30 minutes, selective adsorption of the bactericide to the fibers did not occur, and no bactericidal properties were imparted.

Also, the bactericidal agent used in the present invention 2. As an example of using another fungicide instead of 'i', da'-trichloroco'-hydroxydiphenyl ether, we used alkyldimethylbenzyl ammonium salt 1% OWF, which is well known as a cationic fungicide with excellent bactericidal effect. Using an aqueous liquid consisting of 7% owf of methyl alcohol, acrylic fiber Bonnel v/7BJd' was added in the same manner as above at a bath ratio of /:! ;0.9g
When the fibers were immersed in U for 30 minutes, almost all of the bactericide was ionically bonded to the acidic groups in the fibers, but the bactericide did not ooze out onto the fiber surface, and no bactericidal properties were imparted at all.

This shows that the method of the present invention, which uses an emulsified aqueous dispersion treatment liquid using Co, 1I, 1I'-trichloroyu'-hydroxydiphenyl ether and a low boiling point solvent, is superior.

The method of the present invention can be applied to any type of fiber, and is particularly preferably applied to synthetic fibers and semi-synthetic fibers such as acrylic fibers, polyamide fibers, polyester fibers, and acetate fibers.

Furthermore, the present invention can be applied to fibers in any of the following shapes: fabric-like fibers, thread-like fibers, cotton-like fibers, and tow-like fibers.

Permanently sterilizing fibers obtained by the method of the present invention can be spun, knitted and woven in the same way as ordinary fibers, and can be blended with other fibers, knitted and woven, etc., to produce permanently sterilized fiber products, if necessary. can.

For example, in addition to general clothing such as socks, tights, and underwear, it has extremely high utility value in fields such as sterilizing work clothes for hospitals and pharmaceutical factories, carpets, bathroom mats, and curtains.

Hereinafter, the present invention will be explained with reference to Examples, and the bactericidal properties and washing were carried out in the following manner.

(1) Measurement of bactericidal properties Place the sample on an agar medium inoculated with Staphylococcus aureus, culture the bacteria for 2 hours at 37C, and sterilize by determining the presence or absence of growth of Staphylococcus aureus around the sample. Determine effectiveness.

(Judgment) Q: No bacterial growth is observed around the sample/halo occurs.

△: No halo is generated around the sample, but no bacterial growth is observed on the sample surface.

×: Bacterial growth was observed on the surface of the sample.

(J) Washing method Using a household electric washing machine, wash for 1S minutes in a 30C aqueous solution containing neutral detergent Deb (manufactured by Kao Soap Co., Ltd.), then rinse under running water for 3 minutes, dehydrate, dry.

For repeated washing, the above operations are repeated.

Example/ Flame-retardant acrylic fiber Bonnel ■7 da B10 dVCL raw cotton (manufactured by Mitsubishi Rayon Co., Ltd.) was dyed using an Obermeyer dyeing machine.
After dyeing brown using a cationic dye using a conventional method, the emulsion dispersion aqueous treatment solution consisting of the fungicide 2,9゜t'-trichloroco'-hydroxydiphenyl ether θ/%owf, %ethyl alcohol/%Owf was used to bathe. A bactericidal treatment was performed for 3θ minutes at a ratio of 30 and goC, followed by washing with running water and centrifugal dehydration, followed by aqueous treatment with QOC containing a soft smoothing oil Safal/F (Sanyo Chemical Co., Ltd.) 109/1. After oil treatment using liquid, centrifugal dehydration, fibrillation, and dry heat treatment for 75 minutes using a 105C hot air dryer.
A dyed flame-retardant acrylic raw cotton for carpeting was obtained which had fungicidal activity of 4% and was given biocidal properties.

Using this raw cotton, a spun yarn was made by a conventional method, and then a tufted carpet was made and the presence or absence of bactericidal properties was investigated.

As a result, no growth of Staphylococcus aureus was observed around the carpet, a halo was formed, and the carpet had excellent bactericidal properties.

Subsequently, the product was washed 20 times to determine if it had permanent sterilizing properties, and the sterilizing properties were measured. It was possible to obtain a flame-retardant acrylic fiber carpet.

Example In the process of dyeing raw cotton for flammable acrylic fiber carpets by the method of Example 1, the fungicide Co+4'+Da'-trichloroco'-hydroxydiphenyl ether 0.2%□wf% ethyl alcohol/ %owf was added, emulsified and dispersed, and dyed with 10A;C for 10 minutes, sterilization imparting processing and dyeing processing were performed simultaneously, washing under running water, centrifugal dehydration, followed by oil treatment and drying treatment in the same manner as in Example 1. We obtained dyed flame-retardant acrylic fiber raw cotton for carpets that had been treated with bactericidal properties, and made tufted carpets using this raw cotton to examine the presence or absence of bactericidal properties. As a result, no bacterial growth was observed around the carpet, a halo was formed, and the carpet had excellent bactericidal properties.

Subsequently, '' was washed twice to find out whether it has long-term sterilization properties or not.
After 0 cycles, we measured the bactericidal properties and found that bacteria grew around the carpet, and a halo appeared, indicating that we were able to obtain a flame retardant acrylic fiber carpet with excellent permanent bactericidal properties. .

Example 3 Acetate & Fiber Carolan (Mitsubishi Acetate Co., Ltd.) taffeta fabric was dyed with fractional dye Dianic Sprue BG-FS (Mitsubishi Kasei Co., Ltd.)/0% owf, dyeing aid Disper T
L (manufactured by Kasei Kagaku Co., Ltd.) 20% owf % Disper VG (
(manufactured by Kasei Kagaku Co., Ltd.) Bactericide,
Yu, Ri, t'-trichloroco'-hydroxydiphenyl ether 0.2% owf and methyl alcohol 2% owf
Using an emulsified dispersion dyeing solution prepared by adding f, the bath ratio/
: After dyeing with sos9gC for 0 minutes and sterilization imparting treatment at the same time, the fabric was washed with water and dried to obtain an acetate fiber fabric dyed medium blue.

As a result of measuring the bactericidal properties of this dyed fabric, it was found to have excellent bactericidal properties, and no bacterial growth was observed around the fabric, with no halo occurring.

Continuing from step 1, in order to find out whether it has permanent bactericidal properties, we repeatedly washed it 20 times and then measured its bactericidal properties.As a result, no bacterial growth was observed around the fabric, and a halo appeared, indicating that it was an excellent product. It had permanent bactericidal properties ○ Example 1 Commercially available acetate, nylon, polyester, and cotton cotton jersey knitted fabrics were thoroughly scoured and then treated with an irritant.
4' + 4'') containing lychloro ζ', hydroxydiphenyl ether/'; l/13, and methyl alcohol comb/l. After immersing in an emulsified dispersion of ZSc in an aqueous treatment solution, the liquid was squeezed using a mangle. The amount of the treatment liquid applied to the knitted fabric was 9% to 3% g.

Subsequently, dry heat treatment was performed for 30 minutes using a lθsC hot air dryer to obtain 17 types of net fabrics treated with bactericidal properties.

In order to find out whether these 17 types of silk fabrics have permanent bactericidal properties, we repeatedly washed them 20 times and measured their bactericidal properties against Staphylococcus aureus. It was possible to obtain acetate knitted fabrics, nylon knitted fabrics, polyester knitted fabrics, and cotton knitted fabrics that exhibited excellent permanent sterilization properties with no growth of bacteria and halo formation.

Claims (1)

[Claims] , 2, +, lI'-trichloro-21-hydroxydiphenyl ether and an emulsifying dispersion treatment liquid containing as a main component a solvent having a boiling point below the boiling point of water that can dissolve the compound and stably disperse it in water, A processing method for imparting permanent bactericidal properties to kl and fibers, characterized by treating the fibers at a temperature higher than the boiling point of the solvent.