JPS6229231Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite film having an easily peelable sterile surface including an aluminum vapor deposited layer.

Conventionally, sterile films with sterilized surfaces are
Sterilize the surface with a disinfectant such as H ₂ O ₂ , or
Alternatively, it is manufactured by sterilization methods such as heat sterilization, radiation sterilization, or ultraviolet irradiation sterilization.

However, when sterilizing with H ₂ O ₂ , residuals inside the package made of sterile film
There was a possibility that H ₂ O ₂ would have an adverse effect on the packaged items inside the package.

Furthermore, when sterilizing by heat sterilization, materials such as polyethylene that cannot withstand the heat sterilization temperature cannot be used.

Furthermore, when sterilizing by radiation sterilization or ultraviolet irradiation sterilization, the heat sealing material such as polyethylene deteriorates or crosslinks, resulting in poor heat sealability.

The present invention eliminates these drawbacks and is a composite film characterized by forming a sterile surface on the film by taking advantage of the fact that microorganisms and dust can be removed from the film to be deposited depending on the degree of vacuum during metal deposition. be.

The present invention will be described in detail below with reference to the drawings.

In the present invention, as shown in FIG.
will be established. Furthermore, a metal vapor deposition layer 4 is provided on the exposed surface of the heat-sealable vapor deposition layer 3 such as high density polyethylene in an untreated state, and a release layer such as low density polyethylene is applied to the surface of the metal vapor deposition layer 4 by a dry lamination method. It is a composite film having a sterile surface provided with a sterile surface.

Here, the base material 1 is made of paper, aluminum foil, plastic film, or a laminate of these materials, and may be provided with a printed layer as appropriate.

The metal vapor deposition layer 4 provided on the vapor deposition layer 3 was provided by vapor depositing metal such as aluminum at a vacuum degree of about 10 ^-4 to ^{10 -6} Torr, so the vacuum caused by vapor deposition causes the vapor deposition layer 3 to Microorganisms and dust on the surface are removed, creating a sterile surface.

In addition, when providing the metal vapor deposited layer 4, the three surfaces of the heat sealable vapor deposited layer such as high density polyethylene are formed in an untreated state such as no anchor treatment, while the metal vapor deposited layer 4 and the release layer 5 such as low density polyethylene are formed in an untreated state such as no anchor treatment. Since the layers were laminated by the dry lamination method, when the obtained composite film is peeled off, the layer 3 to be vapor-deposited and the metal-deposited layer 4 are easily separated, as shown in FIG. 2, and the sterile surface can be exposed.

Here, the metal vapor deposited layer 4 is preferably provided as thinly as possible so that it can be peeled off and removed.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the composite film of the present invention, and FIG. 2 is a cross-sectional view when the film of FIG. 1 is peeled off. DESCRIPTION OF SYMBOLS 1... Base material, 2... Adhesive layer, 3... Vapor deposited layer, 4... Metal vapor deposition layer, 5... Peeling layer.

Claims (1)

[Scope of utility model registration request] A composite film in which a heat-sealable vapor-deposited layer is provided on a base material via an adhesive layer, a vacuum metal-deposited layer is provided on the surface of the vapor-deposited layer in an untreated state, and a release layer is further provided on the surface of the metal-deposited layer.