JPS58156074A - Sterilizable fiber molded article - 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 fiber molded article having sterilizing properties.

Cationic substances such as quaternary ammonium ions, chisel ions, copper ions, and zinc ions have excellent bactericidal effects against microorganisms.For example, benzalkonium ions have about 500 times the bactericidal power of phenol, and have an odor. It is widely used in hospitals because it does not cause roughness or roughness on the hands.

Such cationic substances have a bactericidal effect even in very small amounts, and therefore, if a very small amount of cationic substances with bactericidal properties can be gradually released, the bactericidal effect can be sustained over a long period of time. .

The purpose of the present invention is to make use of the characteristics of such a cationic substance having bactericidal properties, to bond a cationic substance having bactericidal properties to a polyurethane-containing fiber molded product, and to produce a fiber molded product having permanent bactericidal properties. It is about providing.

That is, the present invention provides a bactericidal fiber in which a part or all of the cation exchange groups are combined with a cationic substance having bactericidal properties in a polyurethane-containing fiber molded article having a cation exchange ability and a cation adsorption parameter of 2.5 or more. It relates to molded products.

The bactericidal fiber molded article of the present invention utilizes the cation exchange ability of polyurethane in the polyurethane-containing fiber molded article, and the bactericidal substance ionically bonded with the polyurethane in the fiber molded article is released from the surface of the fiber molded article. It is gradually eluted and shows excellent bactericidal properties.

Perhaps because ordinary fiber moldings have a more dense structure than urethane, even if a cationic substance with bactericidal properties is bonded to the acidic group in the fiber molding, it will not dissolve into the cationic substance. , shows no bactericidal effect.

The cation exchange group used in the present invention may be any group capable of binding cationic substances such as quaternary ammonium ions, silver ions, copper ions, etc., such as carboxyl groups, sulfone groups, and hydroxyl groups.

Further, it is preferable that such cation exchange groups exist in a concentrated manner as much as possible in the surface layer of the fiber.

In the present invention, the polyurethane-containing fiber molded product having a large amount of cation exchange groups on the fiber surface layer preferably has a cation adsorption capacity of 2.5 or more as a cation adsorption parameter, and a cation adsorption parameter of less than 2.5 is not good. Permanent sterilization cannot be achieved.

Examples of the polyurethane-containing fiber molded product having cation exchange ability of the present invention include composite spun fibers in which polyurethane is present in the sheath part or side part of the fiber cross section, and fiber molded products made by blending or blending polyurethane fibers with other fibers. Examples include molded fibers formed by impregnating and fixing polyurethane resin. Furthermore, the sterilizing fibers/yarns obtained by the above method can be twisted, interwoven, or knitted with other fibers/yarns.

In these cases, it may be set in relation to the tti cation adsorption parameter of the polyurethane contained in the fiber molded article.

Since the cation adsorption parameter varies greatly depending on the type of polyurethane and the internal structure of the polyurethane fiber or resin, it is sufficient to set an appropriate tt number for each polyurethane used, but the cation adsorption parameter needs to be 2.5 or more.

There are no particular limitations.

The bactericidal fiber molded article of the present invention can be obtained by treating a polyurethane-containing fiber molded article as exemplified above with an aqueous solution containing a water-soluble cationic substance having bactericidal properties. This treatment may be applied to cotton-like materials, filamentous materials, or fabric-like materials, or to textile secondary products using the fibers.

Examples of the water-soluble cationic substance having bactericidal properties used in the present invention include quaternary ammonium salts and copper salts. Ammonium salts are preferably used.

As the quaternary ammonium salts, any water-soluble salt having bactericidal properties may be used. Examples of the trimethyl type quaternary ammonium salts include dodecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, Further, as the benzyl type quaternary ammonium salt, Fi such as lauryldimethylbenzylammonium chloride, tetradecyldimethylbenzylammonium chloride, octadecyldimethylbenzylammonium chloride, etc. are preferably used.

For example, a polyurethane-containing fiber molded article containing tetradecyldimethylbenzyl ammonium chloride
When treated by immersion in an aqueous solution at 0.degree. C., the anionic groups in the polyurethane and tetradecyldimethylbenzyl ammonium ions bond, resulting in a fibrous molded article having bactericidal properties.

In this case, the amount of the sterilizing cationic substance bound can be adjusted by changing the content of the polyurethane in the polyurethane-containing fiber molding used and the concentration of the sterilizing cationic substance in the aqueous solution.

In addition to immersion in an aqueous solution of the bactericidal cationic compound to a fiber molded article, any of the usual addition methods such as spraying and impregnation can be used. In other words, by adding it to an appropriate bath that is carried out simultaneously with the finishing process, for example, oil treatment, it is possible to avoid increasing the number of finishing processes.

The bactericidal effect of the bactericidal fiber molded product of the present invention is based on the elution of the cationic compound having bactericidal properties contained in the fiber molded product. Therefore, after long-term use, it is possible to regenerate the bactericidal effect by treating with an aqueous solution containing a cationic substance with high bactericidal properties.

The sterilizing fiber molded product of the present invention has extremely high utility value in the fields of carpets, mattresses, bedclothes, clothing, etc. such as futons and blankets, sheets and socks.

It can also be used in applications where it is necessary to prevent decomposition caused by microorganisms, such as shoe insoles, ropes, and nets.

In the present invention, cation adsorption parameters and bactericidal properties were measured by the following method.

■Cation adsorption parameters.

The sample fiber molding was dyed with O, 1 and basic violet 1 under the following conditions, the dye adhesion it (m7 +nol/Kg) to the test fiber molding was calculated, and this value was calculated using the cation adsorption membrane. -Targeted.

Staining conditions; C1■, basic violet 1 2056 o
wg acetic acid α5%owg acetic acid α5%owg bath ratio 15
0 Temperature, time 30 x 30 minutes ℃ ■Bactericidal property The test sample was placed on an agar medium inoculated with Staphylococcus aureus, and the bacteria was cultured at 67℃ for 24 hours. The bactericidal effect was determined based on the presence or absence of growth.

Hereinafter, the present invention will be explained by examples.

Example 1 Acrylic fiber dyed yarn for carpet (brown hue, count 10 MO) made by a normal method using acrylic fiber bonnell (manufactured by Mitsubishi Rayon ■) was dyed with Elastron 0-52 (water-soluble urethane 17). After immersing in an aqueous solution at 25°C containing 165% by weight of aqueous liquid containing resin (manufactured by Daiichi Kogyo ■), the liquid was removed using a centrifugal dehydrator, and the amount of resin liquid attached was reduced to 45% by weight.
% by weight, and then dried at 110℃ for 2 hours using a hot air dryer.
A dry heat treatment was carried out for 0 minutes to obtain a dyed yarn for carpet containing 5 parts by weight of polyurethane.

The cation adsorption parameter of this polyurethane-containing carpet dyed yarn was measured and a value of 11.2 was obtained.

Subsequently, this polyurethane-containing carpet dyed yarn was immersed for 30 minutes in an aqueous solution at 40°C containing cationic fungicide tetratecyldimethylpendyl ammonium chloride (1 k), followed by washing with water, centrifugal dehydration, and drying [2].
, an acrylic fiber dyed yarn for carpets bound with tetradecyldimethylbentylammonium ions was obtained.

This dyed yarn for carpet has excellent bactericidal properties, and the dyed acrylic fiber yarn for carpet, which has been treated to bind with tetradecyldimethylbentylammonium ions, is placed on an agar medium inoculated with Staphylococcus aureus. 24 at 37℃
As a result of culturing the bacteria, no growth of Staphylococcus aureus was observed around the sample, indicating that the sample had excellent bactericidal properties.

On the other hand, untreated ordinary carpet dyed threads do not exhibit bactericidal properties, and a bactericidal test using the same method revealed that
Staphylococcus aureus grew significantly around the sample.

Subsequently, in order to find out whether this dyed yarn for sterilizing carpet had permanent sterilizing properties, we washed it under running water for 5 hours using a garden washing machine, dehydrated it, dried it, and measured its sterilizing properties.
No growth of Staphylococcus aureus was observed around the sample.
It had excellent permanent bactericidal properties.

Example 2 A polyester fiber taffeta fabric was coated with a resin solution consisting of 60% by weight of Crisbon 8816 (manufactured by Dainippon Ink ■, polyurethane resin) and 40% by weight of dimethylformamide, and then immersed in water at 25°C for coagulation treatment. It was sufficiently washed with water and dried to obtain a polyurethane-containing polyester fiber fabric 1.

As a result of measuring the cation adsorption parameter of this polyurethane-containing polyester fiber fabric, a value of 35.6 was obtained.

Subsequently, the polyurethane-containing polyester fiber fabric was treated with a cationic fungicide Sunisol CC (manufactured by Kao Atlas ■, dimethylbenzylalkylammonium chloride aqueous solution) 1
After being immersed for 60 minutes in an aqueous solution at 40° C. containing % by weight, the fabric was washed with water, centrifugally dehydrated, and dried to obtain a polyurethane-containing polyester fiber fabric to which dimethylbenzylalkylammonium ions were bonded.

The bactericidal properties of this fabric were measured using the same method as in Example 1, and as a result, no growth of Staphylococcus aureus was observed around the sample, indicating that it had excellent bactericidal properties.

Subsequently, in order to find out whether it has permanent sterilizing properties, we used 2 fully automatic home washing machines, 2 neutral detergent Zabu (manufactured by Kao Soap), and 1 t/As.
- After repeated washing with the aqueous solution at 25°C 20 times, the bactericidal properties were measured. As a result, no growth of Staphylococcus aureus was observed around the sample, indicating that it had vague permanent bactericidal properties. .

Example 6 80 pieces of acrylic fiber, 20% nylon fiber mixed O+740
Cation adsorption halogen made of metric count spun yarn and 30 denier polyurethane filaments 2.
The socks made using the twisted yarn of a were immersed for 30 minutes in an aqueous solution at 40°C containing the cationic bactericide tetratecyldimethylbenzyl ammonium chloride α5 weight ratio, then washed with water, centrifugally dehydrated, dried, and treated with tetradecyl dimethylbenzyl ammonium chloride. A sock bound with dimethylbenzyl ammonium ions was obtained.

The bactericidal properties of this sock were measured using the same method as in Example 1. As a result, no growth of Staphylococcus aureus was observed around the sample, indicating that the socks had excellent bactericidal properties.

Subsequently, in order to determine the presence or absence of permanent sterilization, washing was repeated 10 times in the same manner as in Example 2, and the sterilization was measured. As a result, it was found to have excellent permanent sterilization.

Claims (1)

[Claims] In a polyurethane-containing fiber molded article with cation exchange ability, the cation exchange ability is 2 with the cation adsorption parameter.
5 or more, and a part or all of the cation exchange groups are bonded to a cationic substance having bactericidal properties.