JPH039019B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an easy-to-open packaging container, and more particularly to an easy-to-open packaging container that can be easily opened without destroying the container.

[Conventional technology]

One of the important functions of packaging containers is to have sufficient sealing strength to completely protect the contents during product manufacturing and distribution processes, and to ensure that the base material is not damaged when the contents are removed. An example of this is ease of opening, in which the sealed portion can be easily opened without breaking the seal.

Conventionally, in order to satisfy this requirement, a heat-adhesive layer that can be peeled from the base material and easily breaks is provided on the container base material, and the heat-sealed part can be opened by peeling off the heat-adhesive layer and breaking the film. A method of configuring is used.

However, with easy-to-open containers sealed using this method, there is uncertainty as to which direction the film will break, and the film may break in an unnecessary direction, causing part of the printed layer on the base material to break. There was a drawback that the container was peeled off from the base material together with the thermal adhesive layer, impairing the aesthetic appearance of the container.

[Problem that the invention seeks to solve]

Therefore, the problem that the present invention aims to solve is that the thermally adhesive resin layer breaks in an unnecessary direction when the package is opened.
To provide an easily openable packaging container in which a part of a printed layer provided on a base material is not peeled off from the base material together with a thermoadhesive resin layer and the aesthetic appearance of the container is not impaired.

[Means for solving problems]

As a result of research to solve the above problems, the inventor of the present invention thermally bonded a pair of container base materials 3 each having a heat-adhesive resin layer 9 on the inner surface with the heat-adhesive resin layer 9 facing each other. In order to seal the open part of the container mouth, the opposing thermoadhesive resin layer 9 has a pair of adhesive parts 6a and 6b, and the adhesive part of at least one of the pair of container base materials 3 and By providing an anchor agent printed layer 7 between the container base material 3 and the thermally adhesive resin layer 9, excluding only the portion of the same width or narrower than the width, the membrane rupture of the thermally adhesive resin layer is prevented. The inventors have discovered that it is possible to form a fracture line that occurs along the edge of the area where the anchor agent printing layer is not provided, and does not run anywhere else, and based on this knowledge, the present invention has been completed. .

The easy-to-open packaging container has an opening at the mouth of the container, which is made by thermally bonding a pair of container base materials 3 each having a heat-adhesive resin layer 9 on the inner surface, with the heat-adhesive resin layers 9 facing each other. In the above, the opening part of the container mouth part is
A pair of adhesive parts on the opposing thermally adhesive resin layer 9
6a, 6b, and further excludes only a portion having the same width as or narrower than the adhesive portion of at least one of the pair of container base materials 3, and the container base material 3 and the thermal adhesive resin. An anchor agent printed layer 7 is provided between the layer 9 and the layer 9.

The form of the container according to the present invention may be not only a molded container consisting of a lid and a container body, but also a bag. In addition, in the above, the adhesive part is, for example, in the case of a molded container, the flange surface and the lower surface area of the lid opposite to the flange surface, and in the case of a bag, it is the inner surface area of a pair of packaging materials facing each other around the opening. be.

Hereinafter, the present invention will be explained with reference to the drawings.

FIG. 1 shows an easy-to-open packaging container 11 according to the present invention.

A container opening formed by thermally bonding a pair of container base materials 3, which constitute a container body 1 and a lid 2, and whose inner surfaces are a thermoadhesive resin layer 9, with the thermoadhesive resin layers 9 facing each other. In order to seal the open portion of the container, the thermally adhesive resin layer 9 facing each other has a pair of adhesive parts 6a and 6b, and further has a width equal to or equal to that of the adhesive part of at least one of the pair of container base materials 3. An anchor agent printed layer 7 coated with an isocyanate-based, imine-based, or titanium-based anchor agent is provided between the container base material 3 and the heat-adhesive resin layer 9, except for only the portion narrower than the width. It is provided.

FIG. 2 shows the container shown in FIG. 1 in an unsealed state, in which the heat-adhesive resin portion in the adhesive area where no anchoring agent is present is peeled off from the lid 2 and can be easily opened.

In the easy-open packaging container according to the present invention, the thermal adhesive resin layer breaks along the edge of the area where the anchor agent printing layer is not provided, and there is no other break line. The aesthetic appearance of the container wall will not be impaired due to breakage or peeling of the adhesive resin layer extending to the area where the printed pattern is applied.

In the easy-to-open packaging container according to the present invention, the container base material 3 may be polyethylene, polypropylene, polyamide, polyester, polyvinyl chloride, polystyrene, acrylic resin, polyvinyl alcohol, polypinylidene chloride, polycarbonate, or cellulose. A single plastic film such as plastic, cellophane, or aluminum foil, or a laminated film thereof can be used.

Next, in the easy-to-open packaging container according to the present invention,
The thermoadhesive resin layer can be made of polyethylene, polypropylene, polyamide, ionomer, ethylene-
Vinyl acetate copolymers and the like can be used.

In addition, the thickness of the thermal adhesive resin layer is 10μ, which allows the film to break.
It is desirable that the thickness be about 30 μm to 30 μm.

In the easy-open packaging container according to the present invention, from the viewpoint of ease of opening, it is desirable to provide a non-adhesive portion outside the opening of the container mouth.

In addition, in the easy-to-open packaging container according to the present invention,
If the heat seal width and the width of the area to which no anchor agent is applied are exactly the same, peeling will occur extremely easily, so it is desirable that the heat seal width is slightly wider than the width of the area to which no anchor agent is applied.

[Effect]

In the present invention, the anchor agent printed layer provided except in at least one region corresponding to the adhesive part forms a structure that is easy to open, and the anchor agent printed layer is provided along the edge of the region where the anchor agent printed layer is not provided. In addition to this, it also acts to prevent the break line of the heat-adhesive resin layer from running.

〔Example〕

Example 1 Beautiful designs were printed on polyester #12 using vinyl resin ink (Dainippon Ink Co., Ltd., CVL), and at the same time an isocyanate anchoring agent was applied to the entire area except for the area corresponding to the seal area. Part coated. After that, polyethylene resin (MI=40, SP=0.918) was applied using the extrusion lamination method.
A 30μ extrusion lamination was performed to produce a laminated packaging material having a layer structure of polyester #12/design printing layer/anchor agent part coat layer/polyethylene 30μ. Next, a packaging bag was created using this packaging material.

An opening test was conducted on the resulting packaging bag, and the result was that it could be easily opened without damaging the printed portion of the packaging bag. In addition, the peel strength between the polyester and polyethylene layers in the area without the anchor agent is 40 to 60 gr/15 mm width, the peel strength between the polyester and polyethylene layers in the area with the anchor agent is 200 gr/mm width or more, and the peel strength between the polyethylene layers is 40 to 60 gr/15 mm width. Heat seal strength is 800~1000gr/15
It was mm wide.

Example 2 Nitrocellulose-polyamide ink (manufactured by Toyo Ink Co., Ltd., GNC) was applied to one side of polyester #300.
-X) was used to print a beautiful pattern, and an imine-based anchor agent was part-coated in-line on the other side of the polyester in register with the pattern except for the area corresponding to the seal portion. Then, the side printed with the above polyester is coated with polyvinylidene chloride resin and stretched polypropylene #20.
(manufactured by Daicel Corporation, KOP #20), and then coated with 20μ of polyethylene (MI = 4, SP = 0.918) by extrusion lamination method on the side that was part-coated with the above polyester anchor agent, and then polychlorinated. A laminated packaging material having a layer structure of vinylidene resin coated stretched polypropylene #20/adhesive layer/design printing layer/polyester #300/anchor agent part coat layer/polyester 20μ was produced. Then,
A packaging bag was created using this packaging material.

An opening test was conducted on the resulting packaging bag, and as a result, it was found that the packaging bag could be easily opened without damaging the printed portion. In addition, the interlayer peel strength between polyester/polyethylene in the area without anchoring agent is 40 to 50gr/15mm width, and the interlayer peeling strength between polyester/polyethylene in the area with anchoring agent is 150gr/15mm width, between polyethylene layers. The heat seal strength between is 500~600g
It was r/15mm wide.

〔Effect of the invention〕

As described above in detail, the easy-open packaging container according to the present invention can be easily opened, and the film rupture of the thermoadhesive resin layer 9 occurs along both edges of the area where the anchor agent printing layer is not provided. Since the thermal adhesive resin layer 9 only breaks or peels off in the area where the anchor agent is not printed, it extends to other unnecessary areas and directions. Therefore, it has the advantage that when the container is opened, it will not peel off and become dirty, which will impair the aesthetic appearance of the container.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an easy-to-open packaging container of the present invention;
FIG. 2 is a sectional view showing the container shown in FIG. 1 in an unsealed state. DESCRIPTION OF SYMBOLS 1... Container body, 2... Lid, 3... Container base material, 6a, 6b... Adhesive part, 7... Anchor agent printed layer, 8... Printed pattern layer, 9... Heat adhesive resin layer , 10a, 10b...non-adhesive portion, 11...easy-open packaging container.

Claims (1)

[Scope of Claims] 1. A container having an opening at the mouth formed by thermally bonding a pair of container base materials 3 whose inner surfaces are a thermoadhesive resin layer 9 with the thermoadhesive resin layers 9 facing each other. In the packaging container, the open part of the container opening has a pair of adhesive parts 6a and 6b on the opposing heat-adhesive resin layer 9,
Further, an anchor is provided between the container base material 3 and the thermally adhesive resin layer 9, excluding only a portion of at least one of the pair of container base materials 3 having the same width as or narrower than the adhesive portion. An easy-to-open packaging container having an agent-printed layer 7. 2. A non-adhesive part 10 is provided outside the open part of the container mouth part.
The easy-open packaging container according to claim 1, further comprising: a and 10b. 3 The anchor agent printed layer 7 on the 3 sides of the container base material
3. The easy-open packaging container according to claim 1 or 2, characterized in that a printed pattern is applied by matching the pattern.