JPS6049795A - Sterilizing fiber sheet - Google Patents

Abstract

PURPOSE:A sterilizing fiber sheet having sterilizing ability sufficiently usable for water treatment system, air-conditioning system, etc., having sterilizing ability for a long period, obtained by immobilizing a lytic enzyme having sterilizing ability to the fiber surface of nonwoven fabric. CONSTITUTION:A lytic enzyme having sterilizing ability is immobilized to the fiber surface of nonwoven made by using natural fiber or chemical fiber or blended fiber of them by immobilization treatment such as carrier bonding, crosslinking, inclusion process, etc. The carrier bonding, for example, is carried out by treating nonwoven fabric of 100% nylon with hydrochloric acid, processing the fiber surface into a diazonium derivative, immobilizing an enzyme to it by diazo coupling. The crosslinking is done by treating the surface of nonwoven fabric consisting of 100% nylon fiber with hydrochloric acid, subjecting an enzyme to carrier crosslinking with glutaraldehyde.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction of a sterilizing fiber sheet in which an enzyme having sterilizing ability is immobilized on the surface of fibers constituting a nonwoven fabric.

Conventionally, as a sterilization method in water treatment systems, air conditioning systems, etc., ultraviolet irradiation type sterilizers have been used. However, although this device is very expensive, it cannot be said that it has sufficient sterilizing ability. For this reason, there is a drawback that microorganisms collected in, for example, high-performance filters used in pure water production equipment or various filtration membranes continue to increase in nitrogen. Therefore, the entire water treatment system is sterilized with chemicals, etc., and the filters are replaced regularly, but the cycle is often as short as one week. In addition, in air conditioning systems, air conditioning filters become a breeding ground for microorganisms, and microorganisms infest the inner surfaces of pipes, causing foul-smelling air to be circulated. For this reason, if the filter is replaced regularly,
There are drawbacks such as the need for cleaning, which requires labor and increases running costs.

The present invention solves the above-mentioned drawbacks by immobilizing an enzyme with sterilizing ability on the surface of the constituent fibers of natural or chemical fibers or a nonwoven fabric made of a mixture of these fibers, thereby achieving sterilizing ability without the proliferation of microorganisms. This provides a long-lasting bactericidal fiber sheet.

In constructing the sterilizing fiber sheet of the present invention, a carrier binding method, a crosslinking method, or an entrapping method is used to immobilize an enzyme having a sterilizing ability on the surface of the fibers constituting the nonwoven fabric.

For example, as an example of a carrier bonding method, a nonwoven fabric made of 100% nylon (polyamide) fibers is treated with hydrochloric acid, the surface of the fibers is converted into a diazonium derivative, and an enzyme is immobilized thereon by converting it into a diazonium derivative.

An example of a crosslinking method is to surface-treat a nonwoven fabric made of 100% nylon with hydrochloric acid, and then crosslink the enzyme with the carrier using glutaraldehyde.

In addition, as an example of the comprehensive method, a nonwoven fabric made of mixed fibers of 50% polyester fiber, 60% acrylic fiber, and 20% nylon fiber is formed, and the nonwoven fabric is combined with a carrier resin such as polyacrylamide thread or a photocurable resin. Immerse in the mixture with the enzyme. Next, the adhered carrier resin is cured in a dryer or a curing oven to form a nonwoven fabric in which the fiber surface is coated with the resin.

In addition, as the enzyme to be immobilized by this immobilization method, a lytic enzyme or other enzyme with excellent bactericidal performance is used.

Furthermore, the 24m constituting the nonwoven fabric used in the sterilizing fiber sheet of the present invention includes cotton, hemp, wool, asbestos, cellulose-based Niu or semi-synthetic fibers, polyamide-based, polyvinylalco-/I/-based, and polyvinylchloride-based fibers. , polyester,
Synthetic fibers such as polyacrylonitrile, polyethylene, polypropylene, 7sLnol, and Teflon, or inorganic fibers such as glass and carbon are selected individually or in combination, and then a web is formed and a binder is used. A nonwoven fabric having a desired thickness is formed and used by known bonding means such as , thermal bonding, needle punching, and the like.

The present invention will be explained in more detail below with reference to Examples.

Example: Commercially available immobilization fermentation of a non-woven fabric with a fabric weight of 250 tons and a thickness of 15 made from IOO% nylon short fibers.
Enzymes such as Φ sosamidase, amidase, and grotease were mixed into N-acetyl, and the above-mentioned nightgown nonwoven fabric was impregnated with the mixture in a predetermined amount, and the mixture was sealed with a fabric weight of 480 tons.

Next, the nylon nonwoven fabric was introduced into a curing furnace and irradiated with ultraviolet rays for 130 seconds to cure the resin. As shown in FIG. A sterilizing fiber sheet was formed.

This fiber sheet was attached as a filter to the entrance of a container with an internal volume of 1μ, and water containing E. coli was collected at 10 g/w per minute.
It was drained and filtered with a miscarriage of in.

In order to understand the bactericidal effect of the bactericidal fiber sheet of the present invention, changes in the concentration of Escherichia coli contained in water before and after filtration were measured, and the results shown in the table below were obtained.

Unit: 4° It was found to be particularly superior to conventional ultraviolet sterilizers (99% sterilizing ability in air). In addition to Escherichia coli, it was also confirmed that it has a bactericidal effect on Shigella, Bacillus subtilis, Salmonella typhi, influenza virus, Staphylococcus aureus, etc.

Since the present invention has the above configuration, it can be used at home, school, hospital, company, etc.
By using it as a filter in air conditioners and water treatment systems in cafeterias, theaters, etc., it prevents the growth of the above-mentioned microorganisms, prevents the outbreak of infectious diseases, food ingestion, and cold sores, and prevents mold growth. It is possible to prevent bad odors and create a comfortable and sanitary atmosphere. It is also suitable as a sheet-like material for food packaging as it has a breathable and sterilizing effect, and as a dish towel and table cloth as it maintains its sterilizing effect. This invention has excellent effects such as being suitable even if such methods are used, and can be supplied at a low cost.

[Brief explanation of the drawing]

The drawing is a schematic diagram of a sterilizing fiber sheet showing one embodiment of the present invention. 1...Nylon fiber 2...Enzyme 3...Resin patent applicant Hiroshi Kanai

Claims (1)

[Claims] A lytic enzyme with bactericidal ability is applied to the fiber surface of a nonwoven fabric made of natural fibers, chemical fibers, or mixed fibers thereof as web constituent fibers by a carrier binding method, a crosslinking method, or an entrapping method.
A sterilizing fiber sheet characterized by being fixed by a fixing treatment such as.