JPH0410183Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a patch, and more specifically to a patch that prevents volatilization of odoriferous components.

[Prior art] Conventionally, this type of patch has a support made of relatively stretchable cloth with a plaster applied to one side, and drugs such as menthol, camphor, and methyl salicylate have been used. Ta.

During use, these components volatilize odor-bearing components from the back surface of the support, causing discomfort to the user and people around them.

Conventional techniques to improve this point include: (1) A thin metal film layer is provided between the support and the plaster layer or on the back of the support (Utility Model Application No.
(No. 165043) (2) A synthetic resin film layer provided between the support and the plaster layer or on the back of the support (Jitsukai Sho
48-40471 and Utility Model Application Publication No. 57-59819).

[Problems to be Solved by the Invention] However, in the technique (1) above, the patch loses its flexibility and elasticity due to the thin metal film layer, so it is difficult to apply to affected areas that expand and contract, such as joints.

In the technique (2) above, the synthetic resin used for the synthetic resin film layer does not have sufficient barrier properties;
The problem of odor evaporating and causing discomfort to the user and surrounding people remains unsolved.

Moreover, among (2), those in which a synthetic resin film layer is provided between the support and the plaster layer (Utility Model No. 48-
40471), the adhesion between the synthetic resin film layer and the plaster layer is poor, and in order to improve this adhesion, the surface of the synthetic resin film in contact with the plaster must be oxidized using chemicals or corona discharge. , special treatment is required, such as subbing treatment for adhering the synthetic resin film layer and plaster layer.

Furthermore, in the case of a synthetic resin film layer provided on the back side of the support (Japanese Utility Model Publication No. 57-59819), when used as a patch, the outer layer is made of synthetic resin, so the usability is not good. Depending on the type of synthetic resin, its strength also becomes an issue.

[Means for Solving the Problems] In view of these problems, the present inventors conducted extensive research to obtain a patch that is flexible and stretchable and has excellent odor blocking properties. The above-mentioned problems were solved by using a material sandwiched between cloth-like bodies as a support, and the present invention was completed.

That is, the present invention is a patch characterized in that the support is made of a vinylidene chloride film with cloth-like bodies adhered to both sides.

The present invention will be explained in detail below.

The adhesive patch of the present invention consists of a support, a plaster layer, and a release sheet.

The support consists of a vinylidene chloride film layer and a cloth-like body divided into two layers. Among these cloth-like bodies, the one between the vinylidene chloride film layer and the plaster layer is separated from the plaster layer. The thickness should be sufficient to provide sufficient adhesion.

Furthermore, since the vinylidene chloride-based synthetic resin has extremely excellent deodorizing properties, a thickness of about 2 μm is sufficient for the vinylidene chloride-based film layer, and its strength can be supplemented by the outer cloth-like material.

With such a configuration, the present invention can maintain the flexibility and elasticity of the patch while exhibiting an excellent deodorizing effect against volatilization of the drug from the plaster layer.

The vinylidene chloride film refers to a film made of polyvinylidene chloride, a copolymer of vinylidene chloride and other synthetic resin, or a mixture of vinylidene chloride resin and other synthetic resin, but a preferable film is vinylidene chloride. and vinyl chloride copolymer.

Examples of the other synthetic resins include vinyl chloride,
Polyethylene, polypropylene, polyester, polystyrene, etc. can be used.

As the cloth-like body, a woven fabric or a non-woven fabric can be used. The shape of the cloth-like body may be any shape, such as a sheet-like shape, a sheet-like shape having pores, a net-like shape, etc., as long as it is flexible and stretchable and can maintain adhesiveness with other layers.

Note that the two cloth-like bodies may be made of the same material or may be made of different materials.

The plaster layer of the present invention is made by adding commonly used adhesive resins, oils and fats, antioxidants, etc. to a base such as natural rubber, synthetic rubber, or styrene-isoprene-styrene polymer, and then adding menthol. ,
It is made by uniformly blending drugs such as camphor and methyl salicylate.

Moreover, a release sheet is a sheet formed by coating a release agent on the surface of a synthetic resin sheet such as polyester or polypropylene.

[Example] Hereinafter, the present invention will be specifically described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, and FIG. 2 is a partially cutaway perspective view thereof.

This patch is made by thermally adhering cloth-like bodies (material: non-woven fabric) 3 and 5 to both sides of vinylidene chloride film 4 made by the T-die method, and applying plaster 2 to one side using a calendar roll or the like in a conventional manner. The polyester film 1 is spread and coated, and then a polyester film 1 coated with a release agent is attached thereon.

The odor generated from the plaster layer 2 passes through the fabric 3 and is blocked by the vinylidene chloride film layer 4.

Moreover, FIG. 3 is a partially peeled perspective view showing another embodiment of the present invention.

This patch consists of Saran film Y-402 [trade name of vinyl chloride-vinylidene chloride copolymer, manufactured by Asahi Kasei Corporation] 4, with a nonwoven fabric 5 on one side and a net-like woven fabric on the other side. 3 is thermally bonded, a plaster layer 2 is spread and coated on the woven fabric 3 using a calender roll or the like in a conventional manner, and a polypropylene film 1 coated with a release agent is adhered thereon.

[Effects of the invention] Since the adhesive patch of the invention has a vinylidene chloride film layer in the support, it has far superior odor resistance compared to conventional deodorizing films made of synthetic resin, and is highly attractive to users. and do not cause discomfort to surrounding people.

Vinylidene chloride films tend to get scratched in certain directions as they get thinner, but since there is a cloth-like material on the outside of the film, there is no need to worry about scratches, and the film has a high odor-proofing effect, making it possible to It can be made as thin as possible. Therefore, the patch does not lose its flexibility and elasticity, unlike those using a thin metal film or those using other synthetic resins as deodorizing films.

Furthermore, since the outer layer becomes cloth when applied to the skin, there is no discomfort during use.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the patch according to the present invention, FIG. 2 is a partially cutaway perspective view of the patch shown in FIG. 1, and FIG. 3 is another embodiment of the present invention. It is a partially peeled perspective view showing the. In the drawings, 1 is a release sheet, 2 is a plaster, 3 and 5 are cloth-like bodies, and 4 is a vinylidene chloride film.

Claims (1)

[Scope of utility model registration request] A patch characterized in that the support is made of a vinylidene chloride film with cloth-like bodies adhered to both sides.