JPS5826615Y2 - sheets - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to provide a sheet suitable for spreading on a patient's bed or futon, for example.

Beds and futons tend to contain moisture, and the beds and futons of people who have been sick for a long time in particular tend to become breeding grounds for bacteria due to the large amount of accumulated moisture and constant heating by body temperature.

With conventional sheets made of cotton, synthetic fibers, etc., bacteria in the beds and mattresses easily pass through the sheets and migrate to the surface of the sheets, adversely affecting the healing of diseases and wounds.

In addition, conventional sheets easily become damp and have poor surface slipperiness, so they tend to cause bedsores, and these bedsores are aggravated by bacteria that permeate through the sheets, making them difficult to heal.

This proposal was proposed in view of the above, and the surface or both sides of the base fabric 1, such as cotton cloth or synthetic fiber cloth, has pores with a diameter of 0.3 to
The gist is a sheet made by laminating a continuous microporous porous film (or sheet) 2 of 1 μm tetrafluoroethylene resin by adhering it in spots or lines at key points.

The continuous microporous porous film 2 of tetrafluoroethylene resin can be easily mass-produced according to the method described in Japanese Patent Publication No. 51-18991.

To give an overview, the polyethylene tetrafluoride resin powder (PTF)
E powder) and a liquid lubricant (e.g., solvent naphtha, petroleum, etc.) are made into a film or sheet-like PTFE molded body having a crystallinity of about 95 coefficients or higher by a paste molding extrusion and/or rolling method. , the liquid lubricant is removed from the molded body by volatilization at a temperature of about 100 to 300°C, and then the elongation rate per unit time is greater than 10%/second in one or more directions at a temperature of 327°C or less. It is something that expands.

Next, the stretched product is heat set at a temperature of 327° C. or lower, or heated and fired at a temperature of 327° C. or higher.

As a result, a polytetrafluoroethylene resin continuous porous film or sheet having a fine structure in which a large number of micronodules are interconnected by a large number of fibrils (fine fibers) is obtained.

The physical properties of the porous film or sheet 2 are as follows:
By changing manufacturing conditions such as stretching ratio, stretching temperature, stretching ratio per unit time, etc., it is possible to make desired adjustments within a wide range as described below.

Porosity 50-95%, maximum pore size 0.1-20 am.

Density 0.2-1g/cIf13, Gurley No. 1
~100 seconds, ethanol pulp point 0.2-3'
Q 7cm 2 , matrix tensile strength 514) 1
/m or more, wall thickness 0.01m or more, optional.

Due to the properties peculiar to tetrafluoroethylene resin, the surface is extremely smooth, and the resin has excellent water repellency and is extremely flexible as a whole.

It also has excellent heat and chemical resistance.

Therefore, the sheet according to the present invention, which is formed by laminating the film 2 to the base fabric 1, has the following features.

(1) Pore diameter 0.3 to prevent bacteria from passing through as film 2
Since 1 μm is used, it is possible to prevent the transfer of bacteria from the bed/futon side to the sheet surface side.

(2) On the other hand, air permeates through the sheet smoothly due to the fine pores of the film 2, so that stuffiness does not occur.

(3) Due to the excellent water repellency of the tetrafluoroethylene resin, the film 2 itself does not become damp and the surface is always smooth, which, in combination with the above-mentioned (2) that does not cause stuffiness, prevents bedsores. It can be prevented.

(4) Even if liquid is spilled, the excellent water repellency of the film 2 will not allow it to pass through to the bed/futon side, thus preventing the bed/futon from getting wet, and the liquid on the sheets can be wiped without leaving any traces. It becomes dry immediately.

(5) It is highly flexible, has a warm sensation, feels good on the skin, and does not cause any resistance to use.

(6) It is white and has a clean feel, is hard to get dirty, and even if it gets dirty, it can be easily removed by wiping it.

(7) Since the film 2 is extremely chemical resistant, it will not be attacked even if pharmaceuticals or other substances adhere to it and is highly durable.

(8) Since the film 2 has extremely excellent chemical resistance and heat resistance, it can be freely washed, chemically sterilized, and heat sterilized in the same way as ordinary sheets.

(9) Even if an uneven part of the human body comes into direct contact with the surface of the sheet, the film 2, which is a laminate material, is an inert and stable compound, so it has very little discomfort or irritation to human tissue.
Since it is based on uneven contact with the film 2, it is not harmful at all.

Therefore, it can be effectively used not only as the above-mentioned sheets for patients, but also as sheets to prevent small water from getting wet on beds and mattresses for infants, and as ordinary sheets.

The base fabric 1 serves as a reinforcing material, and in addition to the cotton fabric and synthetic fiber fabric described above, appropriate materials such as paper and nonwoven fabric can be used.

The continuous microporous porous film 2 of tetrafluoroethylene resin laminated on the base fabric 1 generally has a sufficient thickness of about 100 μm.

Further, as the adhesive for laminating the film 2 to the base fabric 1, a suitable adhesive such as a urethane adhesive can be used.

The above laminates 1 and 2 are bonded in spots or lines without intervening adhesive over the entire surface.

[Brief explanation of drawings]

The drawing is a sectional view of the sheet according to the invention. 1 is a base fabric, and 2 is a continuous microporous porous film or sheet made of tetrafluoroethylene resin.

Claims (1)

[Scope of utility model registration request] A suitable base cloth such as cotton cloth is coated with a pore size of 0.
A sheet made of a continuous microporous porous film or sheet of tetrafluoroethylene resin with a diameter of 3 to 1 .mu.m, which is bonded in spots or lines at key points.