JPS63160658A - Sheet material having deodorizing and antibacterial action - 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] [Industrial Application Field] The present invention relates to a water-impermeable sheet that has deodorizing and antibacterial properties, and has washing resistance as an effect. , relates to a sheet material that can be used for multiple purposes.

[Conventional technology and its problems]

It is known that deodorants and antibacterial agents can be applied to woven fabrics, nonwoven fabrics, etc. by methods such as impregnating, supporting, sandwiching, coating, etc. to impart deodorizing properties and antibacterial properties. is not known.

The present inventors first formed a water-insoluble resin coating layer containing a deodorizing agent and an antibacterial agent on a fiber sheet to obtain a sheet that has deodorizing and antibacterial properties, and the effect is wash resistance. Successfully filed a patent application (Patent application 1986-24)
No. 0999).

As a result of further research, the inventors of the present invention found that a foam obtained by mixing a deodorizing agent and an antibacterial agent with a foamed urethane raw material that forms closed cells by applying selected chemicals and conditions, and then foam-molding the mixture. , it has been recognized that it exhibits deodorizing and antibacterial properties, and a laminated sheet of urethane foam and a fiber sheet such as woven fabric or non-woven fabric is a material that is impermeable to water and air. The present invention was completed based on the recognition that it has the following functions and can be used for multiple purposes.

[Structure of the invention]

That is, the present invention relates to a sheet material which is a lamination of a foam sheet containing a particulate deodorizing agent and an antibacterial agent and a fiber sheet, and which has wash-resistant deodorizing and antibacterial effects. .

The deodorizing agent and antibacterial agent used in the present invention must be in the form of fine particles that are insoluble or poorly soluble in water. Antimicrobial agents such as dichloromethylthio)phthalimide are particularly useful.

The appropriate amount of deodorizing agent is 3 to 30 g per 1 m'' of the product, and the appropriate amount of antibacterial agent is about 0.2 to 2 g.

Further, as the foam, one made of polyurethane resin is preferably used.

A foamed urethane sheet can be formed by mixing a raw material composition containing a foaming agent with a particulate deodorizing agent and an antibacterial agent, and foaming it in the usual manner.The foaming ratio of 0 is slightly affected by the addition of the above additives. Therefore, it is preferable to carry out the actual production after conducting a preliminary test; however, the foaming ratio is usually hardly affected by the amount of the above-mentioned additive.

A dry method is conveniently used as the foaming method. The foam may be molded into a sheet (or the sheet may be obtained by slicing the foamed mass. Also, as the fiber sheet, any of woven fabric, non-woven fabric, knitted fabric, etc. can be used.

〔Effect of the invention〕

The sheet material of the present invention obtained by laminating a foamed urethane sheet and a fiber sheet is impermeable to water and air, has heat retention and cushioning properties, and can be cut, bonded, and sewn, and is suitable for clothing, interior decoration, It can be used in a wide range of applications such as synthetic leather products, and the products can be made to have deodorizing and antibacterial properties. Moreover, its deodorizing and antibacterial properties can withstand repeated washing, so it is especially effective when applied to diaper covers, slippers, and the like.

When the sheet material of the present invention is used for medical products, etc., there is no risk of rashes because the antibacterial agent or deodorizing agent does not come into direct contact with the skin.

〔Example〕

The present invention will be explained below with reference to Examples, but the present invention is not limited thereto.

Example 1 Basic zinc carbonate (30 mesh passes) was used as a deodorizer and N (fluorodichloromethylthio)phthalimide was used as an antibacterial agent. The mixture was mixed with a urethane resin according to the following formulation, and the mixture was cast on release paper and foamed in a dry manner. A foamed urethane sheet containing a deodorizing agent and an antibacterial agent was prepared.

Deodorizing agent 13 Antibacterial agent 0l 12
4.7 parts by weight To explain the manufacturing method in detail, 30 parts by weight of the drug with the above composition was mixed with a disper.
Stir for 1 minute to mix well, and place on release paper to a thickness of about 0.15o+.
A method was adopted in which the mixture was cast into a mold, followed by curing at 130° C. for 2 minutes to form foam. The bubbles are closed cells. The thickness of the completed foam sheet was 0.5 arm. This urethane foam sheet contains about 10 g of basic zinc carbonate and about 0.88 N (fluorodichloromethylthio)phthalimide per 1 m t.Then, the surface opposite to the release paper side of the urethane foam sheet is coated with polyester. A knitted fabric (fabric weight approximately 100 g/m'') was laminated under the following conditions.

Adhesive: polyurethane, diluted to 38% solids using dimethylformamide/ethyl acetate Coating amount: approx. 100μ, dried on polyurethane at 100'C for 11 minutes Lamination: laminated knit cloth and pressed at 100'C at 140Kg, 24 Time aging The deodorizing and antibacterial performance of the foamed urethane sheet/polyester knit laminate sheet obtained in Example 1 was measured by the following method.

Ammonia gas (NH3) 'Initial concentration (Go)
A sheet piece (size 11 cm x 18 cn+) was placed in a desiccator No. 6, 31 adjusted to 85 to 1105 pp, and the ammonia gas concentration (C) after 4 hours was measured to determine C/Co.

Hydrogen sulfide gas (ttzs): initial concentration (Co) 30
Place a sheet piece (size 11c++ x 18cm+) in a 6,51 desiccator adjusted to ~40pp hydrogen sulfide gas.
was introduced, and the hydrogen sulfide gas concentration (C) was measured after 4 hours had elapsed to determine C/Co.

Antibacterial properties: using Staphylococcus aureus and Escherichia coli, AATC
The test was conducted according to C test method 100-1981. A 3 cm x 3 cm sheet was used as the sample, and the experiment was repeated three times, and the average value is shown.

Place the sample sheet in a 1001D Erlenmeyer flask, sterilize it, and add 0.3II of the test bacterial solution adjusted to approximately 10'/yxl.
11 was added dropwise, and after uniform inoculation, the cells were cultured in the chamber for 6 hours.

After completing the culture, remove the viable bacteria in the sample with 0.1% tritonX.
The 0 dispersion was diluted with sterile physiological saline containing -100, placed in a petri dish, plated on a tryptone-D agar medium, and cultured at 35°C for 48 hours.

After the cultivation was completed, the number of colonies that appeared in the Petri dish was counted, and the rate of decrease was determined from the separately determined number of viable bacteria immediately after inoculation.

Measurements were also performed on the sheet pieces and those that had been washed with water and dried under the following conditions.

Washing test: Washing conditions using an electric washing machine.Detergent: Neutral detergent 10g15j! (Wed) Washing time: 15 minutes Dehydration time: 1 minute Rinse time: 8 minutes Dehydration time: 2 minutes The measurement results are shown in Table 1.

The laminate sheet obtained in Example 1 of Table 1 showed excellent deodorizing performance when used in diaper covers.

Example 2 A laminate sheet consisting of non-foamed urethane film/foamed urethane sheet/woven fabric or non-woven fabric was prepared by the following method. First, a non-foamed urethane film was formed on a release paper.

Solvent (dimethylformamide) 20〃 Solvent (ethyl acetate) 30〃 Yellow pigment 10〃160 parts by weight, that is, the above composition (solid content 20%), was cast to a thickness of 100μ, dried at 110°C for 1 minute, and then A foamed urethane film was obtained.

Next, using the same deodorizer and antibacterial agent as in Example 1, a urethane resin with the following formulation was applied to the above film to a thickness of about 0.3 mv.
a, preheated at 120°C for 1 minute, and then cured at 130°C for 2 minutes to foam.

Foaming agent 3
(FAD-13, manufactured by Seiko Kasei) Crosslinking agent 2
(FAD-11, manufactured by Seiko Kasei) Filler 2
(FAD-12, manufactured by Seiko Kasei) Foam regulating agent 1
(FAD-10, manufactured by Seiko Kasei) Deodorizing agent 20 Antibacterial agent 1 The thickness of the completed urethane foam sheet was 0.80101. On the obtained foamed urethane sheet, a polyester nonwoven fabric (fabric weight approximately 25 g/n+"
) were laminated to obtain a urethane film/expandable urethane sheet/nonwoven fabric laminate sheet.

When the obtained laminate sheet was used as a bag material, a synthetic leather bag with excellent deodorizing performance was obtained.

Claims (1)

[Scope of Claims] 1. A sheet material that is laminated with a foam sheet containing a particulate deodorizing agent and an antibacterial agent and a fiber sheet, which has wash-resistant deodorizing and antibacterial effects. 2. The sheet material according to claim 1, wherein the particulate deodorizing agent is basic zinc carbonate or ferrous sulfate monohydrate.