JPH0433818A - Container and manufacture thereof - Google Patents

Abstract

PURPOSE:To make it possible to install a decorative panel under the condition being free from wrinkle and sagging onto a container main body, even if the container is a deformed one having projected and recessed faces or the like on its surface, and prevent the label installed on the container main body from separating or falling off and give rigidity to the container concerned so as to make it hard to deform by a method wherein a heat-shrinkable label, on which printing is applied, is interposingly installed between an inside container main body and an outside container main body. CONSTITUTION:A container main body 1 consists of an inside container main body 2 and an outside container main body 3, which is arranged onto the outside face of said inside container main body 2. The inside container main body 2 is obtained by forming a three- layered sheeting 9 consisting of interlayer 6, which is made of polyvinyl alcohol copolymer resin material and has gas barrier properties, and inner and outer layers 7 and 8, which are made of polypropylene material, through sheet forming means such as vacuum forming, compressed air pressure-assist forming or the like. The outside container main body 3 is made of transparent or translucent polypropylene resin material and formed by injection molding so as to have the predetermined rigidity. The numeral 10 represents a tubular decorative label made of heat-shrinkable polypropylene film. The decorative label 10 may also be film having heat-shrinkable properties such as polystyrene, polyester or the like and is constituted from foamed thin sheet made of material just mentioned above so as to allow to give heat insulation effect to the container.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a container for storing foods, etc., and a method for manufacturing the same.

(Prior Art) In general, a container body for storing food or the like is fitted with a decorative label printed on the outside to display or identify the stored item.

The label is a label made of a non-heat-shrinkable base material such as paper, synthetic paper, or plastic film coated with an adhesive, or a heat-shrinkable label made of a heat-shrinkable film. There is.

(Problem to be solved by the invention) However, the conventional non-heat-shrinkable label has problems when the attached part of the container body is cylindrical or flat.
The label can be attached to the attached part without wrinkles or slack, but for example, if the attached part of the container has an uneven surface or a tapered shape, the entire surface of the label can be attached to the surface of the attached part. cannot be completely attached to the

As a result, wrinkles and loosening occur in the middle and edges of the label.
There is a problem that a predetermined mounting pattern cannot be obtained.

The above-mentioned heat-shrinkable label is a label that can solve the above-mentioned problem, but since these conventional labels are attached to the outer circumferential surface of the container body, there is a risk that the label may be accidentally peeled off or even fall off. .

Conventionally, sheet-formed containers with gas barrier properties equipped with heat-shrinkable labels have low rigidity, so during retort sterilization or heating in microwave cooking, the shrinkage force caused by the re-shrinkage of the heat-shrinkable label There were problems such as the container becoming deformed.

In view of the above-mentioned problems, the present invention allows a decorative label to be attached to a container body without wrinkles or loosening even if the container has a deformed surface having an uneven surface. It is an object of the present invention to provide a shield that does not peel off or fall off, and has rigidity so that it deforms and separates.

(Means for Solving the Problems) In order to solve the above problems, the present invention has been made as a container and a method for manufacturing the same. A container body 1 is constituted by an outer container body 3 provided on the outer peripheral surface side, and a printed heat-shrinkable label 10 is interposed between the inner container body 2 and the outer container body 3. It is in.

Further, the inner container main body 2 is formed from a sheet body 9 having gas barrier properties, and the outer container main body 3 is formed by injection molding a molten resin material.

The method for manufacturing the container is characterized by attaching a printed heat-shrinkable decorative label 10 to the outer peripheral surface of the inner container body 2 by heat shrinking, and then attaching the inner container body 2 to the male mold 12. The mold is closed with a predetermined interval 15 between the inner container main body 2 side and the female mold 13, and the predetermined interval 1
The outer container body 3 is integrally formed with the inner container body 2 by injecting a molten resin material into the container 5.

(Function) In the above container manufacturing method, when the decorative label 10 fitted onto the inner container body 2 is heated, the decorative label 10 forms taut wrinkles along the outer peripheral surface of the inner container body 2. and contract to a tight state.

Moreover, after fitting the inner container main body 2 onto the male mold 12 with the label 10 attached, the inner container main body 2 side and the female mold 1
Since the outer container body 3 is formed by injecting molten resin material into the space 15 between the label 10 and the inner container body 2, the label 10 does not shift relative to the inner container body 2, making it easy to perform a series of operations. This is possible.

In the container manufactured by the above method, the decorative label 10 is provided between the inner container body 2 and the outer container body 3, so the outer container body 3 protects the label 10 and the label 10 can be peeled off. Prevent it from falling or falling off.

Furthermore, 1-1 the outer container body 3 improves the rigidity, and the heat-shrinkable label 10 is heated in a fixed state by the molten resin injected into the space 15 between the inner container body 2 and the female mold 13;
Since its shrinkability is reduced, the container main body 1 becomes deformed due to heat.

(Example) Examples of the present invention will be described below.

In FIG. 1, reference numeral 1 indicates a container body having a bowl shape with a convex side surface, and the container body 1 is composed of an inner container body 2 and an outer container body 3 provided on the outer surface of the inner container body 2. There is.

As shown in FIG. 2, the inner container main body 2 is a three-layer sheet composed of an intermediate layer 6 having gas barrier properties made of a polyvinyl alcohol copolymer resin material, and inner and outer layers 7.8 made of a polypropylene material. The body 9 is formed by a known sheet forming method such as vacuum forming or compressed air pressure forming.

The outer container body 3 is made of a transparent or translucent polypropylene resin material, and is formed by injection molding to have a predetermined rigidity.

Reference numeral 10 denotes a cylindrical decorative label made of heat-shrinkable polypropylene film, which is attached to the inner container body 2 and the outer container body 3.
They are provided between the peripheral walls 2a, 3a and the bottom walls 2b, 3b, and are heat-sealed to the container bodies 2, 3 without wrinkles or loosening.

On the front or back side of the label 10, there is an inner container body 2.
Alternatively, a predetermined printed display 11 is applied, leaving the heat-sealed portion to the outer container main body 3.

Next, the case of manufacturing the container 1 having the above configuration will be described.

First, the sheet body 9 is formed into the inner container main body 2 of a predetermined shape by a forming means such as vacuum or compressed air pressure forming (see FIG. 2).

Next, after fitting a cylindrical decorative label 10 as shown in FIG. Shrink it to a state where it tightly adheres to the outer peripheral surface and has no wrinkles or looseness (fourth
(see figure).

Next, the inner container body 2 integrally provided with the decorative label 10 as described above is fitted onto the male die 12 of the injection molding device 11 (see FIG. 5). At this time, since the decorative label 10 is integrally attached to the inner container body 2, it does not shift relative to the inner container body 2, and the inner container body 2 can be easily and quickly attached to the male mold 12. It can be fitted externally.

After fitting the inner container body 2 onto the male mold 12, the male mold 12
and the female mold 13 of the device 11 are brought close to each other to close the mold. In the mold closed state, a predetermined gap 15 is provided between the decorative label 10, the inner container body 2, and the female mold 12, and the molten polypropylene is inserted into the gap 15. A resin material is injected through the injection hole 16 formed in the female mold 13 to form the outer container body 3 integrally with the inner container body 2 (see FIG. 6). When injecting the molten resin into the gap 15, the decorative label 10
is positioned on the inner container body 2 and will not shift.

In the above embodiment, the sheet body 9 is composed of the intermediate layer 6 made of a polyvinyl alcohol copolymer resin material and the inner and outer layers 7 and 8 made of a polypropylene material. For example, aluminum foil, polyvinylidene chloride material, etc. may be used as the intermediate layer 6 having gas barrier properties.

Furthermore, various resin materials such as polyethylene, polystyrene, polyester, and polyvinyl chloride may be used for the inner and outer layers 7 and 8, and each of the inner and outer layers 7 and 8 may be made of different materials.

Further, the sheet body 9 is not limited to three layers, but may be provided in multiple layers such as four layers, five layers, etc. having a plurality of the above-mentioned layers as appropriate. In this case, the outermost layer constitutes the outer container body 3. It is preferable to use a material that has good thermal fusion with the resin material. Furthermore,
It is also possible for the sheet body 9 to be composed of only one layer, which is a gas barrier layer.

Further, the resin material for injection molding to form the outer container main body 3 is not limited to the above-mentioned polypropylene, and for example, materials such as polyethylene, polystyrene, polyvinyl chloride, etc. can also be employed.

Further, the decorative label 10 is not limited to a heat-shrinkable polypropylene film, but may also be a heat-shrinkable film such as polystyrene, polyester, polyethylene, polyvinyl chloride, etc., and is made of a foamed film made of these materials. It is also possible to add a heat insulating effect.

Furthermore, the label 10 may be a multilayer film made by suitably combining films made of the above-mentioned materials, and it is preferable to use a film with excellent heat fusion properties for the inner container body 2 and the outer container body 3. preferable.

Further, when printing substantially the entire surface of the label 10, it is preferable to use ink having thermal adhesive properties.

In addition, the design of the specific structure of each part of the present invention can be changed arbitrarily, and it goes without saying that, for example, the shape of the container body 1 may also be tapered or polygonal.

(Effects of the Invention) The container of the present invention formed by the method described above has a label interposed between the inner container body and the outer container body that constitute the container body, so that the outer container body It can protect the label and prevent it from peeling off or falling off.

Further, since the decorative label has heat shrinkability, the label can be tightly attached to the inner container body and the outer container body in a taut state by heating, and the finished state of attachment can be improved.

In particular, with the above configuration, it is possible to attach labels without wrinkles or looseness even on uneven surfaces of deformable containers that have uneven surfaces, etc. This has resulted in the great effect of being able to provide a container with a curved surface.

Moreover, if the inner container body is made of a sheet body with gas barrier properties and the outer container body is formed by injection molding, the container will have excellent gas barrier properties, rigidity, heat resistance, and dimensional accuracy. , its practical value is enormous.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the container according to the present invention, Fig. 2 is a sectional view of the inner container body, Fig. 3 is a perspective view of the decorative label before it is attached to the inner container main body, and Fig. 4 is the decoration FIG. 3 is a cross-sectional view showing a state in which the label for use is attached to the inner container body by heat shrinkage. FIGS. 5 and 6 are cross-sectional views showing the steps of forming a container according to the present invention, respectively. DESCRIPTION OF SYMBOLS 1... Container main body, 2... Inner container main body, 3... Outer container main body, 9... Sheet body, 10... Decoration label, 12... Male mold, 13... Female type, 15...interval. Applicant Fuji Seal Industry Co., Ltd. Agent Patent Attorney Noboru Fujiki＼D

Claims (1)

[Claims] 1. A container body 1 is constituted by an inner container body 2 and an outer container body 3 provided on the outer peripheral surface side of the inner container body 2, and these inner container body 2 and outer container body 3 are A container characterized in that a printed heat-shrinkable label 10 is interposed between the containers. 2. Claim 1, wherein the inner container body 2 is formed from a sheet body 9 having gas barrier properties, and the outer container body 3 is formed by injection molding a molten resin material.
Container as described in. 3. After attaching the printed heat-shrinkable decorative label 10 to the outer peripheral surface of the inner container body 2 by heat shrinking, the inner container body 2 is fitted onto the male mold 12, and the inner container body The mold is closed with a predetermined interval 15 between the second side and the female mold 13, and a molten resin material is injected into the predetermined interval 15 to form the outer container body 3 integrally with the inner container body 2. A method for manufacturing a container characterized by: