JPS6282967A - Film for emergnecy sticking plaster - 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 film for an emergency adhesive bandage for fixing something to a patient's skin by applying it to an affected area.

BACKGROUND OF THE INVENTION Conventionally, emergency bandages have been made of a plastic base film such as soft polyvinyl chloride, polyethylene, or polypropylene coated with an adhesive. but,
Among these plastic base films, flexible polyvinyl chloride films to which a large amount of plasticizer is added for softening are often used.

Problems to be Solved by the Invention However, among the above-mentioned base films, base films made of polyethylene or polypropylene do not have sufficient flexibility or elongation. On the other hand, since soft polyvinyl chloride film contains a large amount of plasticizer, the plasticizer oozes out, making it impossible to coat the adhesive with the adhesive, or the coating is insufficient, resulting in poor adhesion as an emergency bandage. Treatment with anchor coating agents was necessary due to the problems encountered. This lowers the product yield V and increases costs, causing problems in productivity.

It is an object of the present invention to solve the above-mentioned problems and to provide a film for emergency adhesive wounds that is flexible and has appropriate tensile strength and elongation without the need for treatments such as anchor coating agents.

In order to achieve the above-mentioned object, the present invention provides a film for emergency band 1, which is made of 20 to 95% by weight of a hydrocarbon elastomer and 11% by weight of a polyolefin of 5 to 80%.

The hydrocarbon-based distomer used in the present invention is preferably an olefin-based or diene-based hydrocarbon polymer having a Mooney viscosity (ML, +100°C, J-Tech 5K-6300 and below) of 10 to 150. For example, ethylene-propylene rubber, ethylene-1-butene rubber, ethylene-propylene-diene terpolymer, ethylene-
Examples include ethylene copolymer elastomers such as methyl acrylate copolymer and ethylene-ethyl acrylate copolymer.

Polyolefins include homopolymers of α-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, and 4-methyl-1-pentene, and combinations of these α-olefins and other α-olefins. Examples include copolymers, vinyl esters containing these α-olefins as a main component, and copolymers with unsaturated carboxylic acids or their rust conductors. For example, polyethylene, polypropylene, globylene-ethylene copolymers of various densities,
Examples include ethylene-vinyl acetate copolymer, among which ethylene-vinyl acetate copolymer is preferred.

The film for an emergency bandage of the present invention (hereinafter referred to as base film) contains the above-mentioned hydrocarbon elastomer in an amount of 20 to 95 parts by weight, preferably 30 to 500 to 50 parts by weight, 5 to 80 parts by weight of lyolefin, preferably 50 to 70 parts by weight. It consists of heavy-ms. If the hydrocarbon elastomer content exceeds 95% by weight or if the polyolefin content exceeds 5% by weight, the elongation rate of the base film will be too large and the dimensions will become unstable. On the other hand, if the hydrocarbon elastomer content is less than 20% by weight or the polyolefin content is greater than 80% by weight, the hardness will be high and the flexibility and elongation will be insufficient, making it unsuitable as a bond-IfF base material.

The base film of the present invention is made of the above-mentioned mixture, and when up to 15 parts by weight, preferably 2 to 12 parts by weight of liquid paraffin is blended with respect to 100 parts by weight of the above-mentioned mixture, the base film obtained is This is desirable because it makes it easy to adjust the flexibility and elongation of the material.

The base film of the present invention can be formed by heating a hydrocarbon elastomer, a polyolefin, and liquid paraffin as another component at the above-mentioned mixing ratio, melt-kneading the mixture in a bath, and extruding it into a film. For forming the film, it is usually desirable to melt and knead the above-mentioned components using a mixer, mixing roll, etc., and then extrude the mixture through a die using an extruder. The thickness of the film can be selected as appropriate, but is usually about 60 to 120 microns. In addition, stabilizers such as antioxidants and ultraviolet absorbers, fillers such as precipitated barium sulfate, Merck, calcium carbonate, mica, and titanium oxide, and colorants can be added to the base film.

Next, an emergency bandage using the base film of the present invention will be explained.

, the adhesive used for emergency bandages is not particularly limited,
Any material that has adhesive strength to the skin and is less irritating may be used, and examples thereof include ordinary rubber-based medical adhesives and acrylic-based adhesives.

If we explain the emergency bandage using the base film of the present invention based on the drawings, Figure 1 shows the composition as described above! 1 is a sectional view of a bandage in which an adhesive 2 is attached to a base film 1. As a method for attaching the adhesive 2 to the base film 1, a direct coating method or a transfer method can be employed, as in the case of manufacturing a normal adhesive tape.

The shape of the bandage using the base film of the present invention is a roll shape as shown in FIG. 2, a sheet shape as shown in FIG. 3, or a sheet shape as shown in FIG.
Alternatively, it can be in the form of a sheet with a pad 4 as shown in FIG. When forming into a sheet, a separator 6 must be attached to the adhesive, and the material for the separator 3 is preferably polyethylene, polypropylene, polyester, aluminum laminate polyolefin, or the like. In addition, where the separator 3 faces the adhesive, it is desirable to apply a silicone resin treatment to the ninth part to facilitate separation of >1'l from the adhesive.

Effects of the Invention The emergency bandage using the base film of the present invention is flexible and has appropriate elongation and strength because the base film is composed of a hydrocarbon distomer and a polyolefin, and other components include liquid paraffin. In addition, compared to conventional soft vinyl chloride films, it does not contain plasticizers, so it does not require anchor coating treatment and is free from contact with N. Therefore, the anchor coat treatment process in the production of emergency bandages is unnecessary, and this process VC
There is no reduction in product yield due to this, and costs can be reduced.

Example Hereinafter, the present invention will be explained in detail with reference to Examples.

In addition, parts and parts in the examples are based on weight, and the test method is as follows.

(1) Melt index (Ml): ASTM D
-1238 fili (190°C, 2160?>(2) Melt flow rate (MF'R): ASTM D-
1258cc250℃, 216 []IF) (3) Flexural modulus: ASTM D-790 (4) Tensile strength at break, Tensile elongation at break: ASTM (5) Peel strength = (
(According to J Engineering S ZO257) Paste Kizuna-1f on the stainless steel plate and Hibekulite board, and paste Kizuna-1i
Cut f into a width of 20 m, peel off a part to use as a gripping margin, and use a tensile tester j) IJ separation speed of 3011 w/min to 18
The o0 peeling jliil intensity was determined by dl.

(6) W holding crab (according to JIs ZO237) 2 on the stainless steel plate and Bakelite plate.
Paste a 0x20m adhesive plaster test piece, and apply 50 m to this test piece.
The film was heated to 40° C. by applying a peeling force of 100° C., and the time for peeling was measured.

Examples 1 to 6 Ethylene-vinyl acetate copolymer θ body (EVA), ethylene-vinyl acetate copolymer θ
Propylene-diene terpolymer (F2FD), ethylene-propylene rubber (EPR), liquid paraffin (specific gravity α865?/cn1”, viscosity 867 ssa/1
00 below) and talc powder in the proportions shown in Table 1, and 2 parts of phenolic antioxidant α and 2 parts of phosphorus antioxidant α were added to 100 parts of this mixture. The mixture was kneaded at 150° C. for 8 minutes to obtain a raw material for a base film.

This film raw material is supplied to a cast film film forming machine,
Extrusion was performed at a temperature of 200C to obtain a film with a thickness of 60 μm. The physical properties of this film are shown in Table-1.

Next, a natural rubber-based medical adhesive that had been coated and dried to a thickness of 25 to 30 μm <dry state) was transferred to each of the above films and silicone-coated release paper by sandwiching it between nip rolls to obtain a bandage. The obtained bandage was flexible and had the elastic modulus, strength, and elongation as described above, and its adhesiveness and holding power were as follows.

Stainless steel plate 500~550 160~18
0 Bakelite board 650~750 180>

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the invention, FIG. 2 is a side view of another embodiment, and FIGS. 3 and 4 are perspective views of other embodiments.

Claims (1)

[Claims] A film for an emergency bandage comprising 20 to 95% by weight of a hydrocarbon elastomer and 5 to 80% by weight of a polyolefin.