JPH05162731A - Plastic container - Google Patents

Abstract

PURPOSE:To provide a plastic container at a low manufacture cost which can easily by recycled. CONSTITUTION:A container main body and a lid body, which are fittable, are formed by giving a cutting process to a cylindrical blow molded article 1, which is integrally formed by a single resin in such a manner that the air blow-in hole for the main body part 2 and lid part 3 is located on the upper surface of the lid part. The blow-in hole is closed by a tack seal, and the periphery of the contain main body is shrink-packaged under a condition in which a content is filled, and the lid body is fitted. Since only one die is required, the cost is low, and in addition, the contain main body and the lid body are made of the same resin, and therefore, the resin can be recycled without dividing them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic container used for storing foods and the like.

[0002]

2. Description of the Related Art In recent years, as a container for storing foods such as seaweed and seasoning paste, a container body made of blow molded products such as polyester resin instead of a conventional metal can and a lid made of injection molded products such as vinyl chloride. Plastic containers consisting of and are widely used.

[0003]

In the plastic container mentioned in the prior art, the container main body and the lid are made in separate steps, and since two molds are required for that, the cost is high. There was a problem. Also, if the resin of the container body and the lid is different, when reusing the resin,
It is necessary to separate the collected containers, which makes it difficult to reuse the resin used, which is not preferable from the viewpoint of resource saving and environmental protection.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a plastic container which has a low manufacturing cost and can easily reuse a resin.

[0005]

In order to achieve the above object, the plastic container of the present invention has a single main body and a lid so that the air blowing holes are located on the upper surface of the lid. A cylindrical blow-molded product integrally molded with resin is cut into two parts to form a container body and a lid that can be fitted together, and a blow hole on the upper surface of the lid is provided with a moisture-proof tack seal. It is characterized in that the surroundings are shrink-wrapped in a state in which the contents are stored in the container body and the lid body is fitted with the lid body.

Further, it is preferable that the blowing hole is formed in a slit shape so as to be used as a savings box after use.

[0007]

In the plastic container having the above-mentioned structure, the container body and the lid body are formed by dividing a blow-molded product integrally molded of a single resin into two parts. It is made of the same resin.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a blow-molded product as a pre-stage of manufacturing a plastic container, and FIG. 2 is a plan view of the same. This blow-molded product 1 is made by molding a thermoplastic polyester resin (in this embodiment, PETG manufactured by Eastman Chemical Co., Ltd.) into a shape as shown by a direct blow molding method, and has an elliptical cross section. 1 has a cylindrical shape, and the main body portion 2 in the range shown by a in FIG. 1 and the lid portion 3 in the range shown by b are connected by the connecting portion 4. The lower main body 2 has a neck portion 21 having a slightly smaller diameter on the upper portion thereof. The neck portion 21 has a height substantially the same as the height of the lid portion 3 and is horizontally long at four places around the lower portion. The convex portion 5 is formed. Also, the upper lid 3
A concave groove 6 is provided around the lower part of the mold, and a slit-shaped blow hole 7 into which air is blown during molding is formed in the center of the upper surface. In addition, in this embodiment, the blowing hole 7
Is a size that can hold coins.

After molding the blow-molded article 1 having the above structure,
Parts A-A and B-B in FIG. 3 are cut with a double-blade trimmer. By this cutting process, the connecting portion 4 is removed and the blow-molded product 1 is divided into upper and lower parts, and the separated main body 2 serves as a container body and the lid 3 serves as a lid. Then, a moisture-proof tack seal is attached to the position shown by the dotted line in FIG. 2 so as to close the blowing hole 7 in the lid. In this example, a tack seal made of polyester film / aluminum foil / adhesive was used.

After filling the container body prepared as described above with seaweed, the container body is covered and pushed into the container body 2 ', as shown in FIG. The concave groove 6 is fitted to fix the both. Next, a plastic shrink container of the present invention is formed by covering a shrink film having a tubular shape made of a polyester film, which is slightly longer than the covered container, and shrinking the shrink film.

As the resin constituting the blow molded product, polypropylene, polyethylene or the like may be used in addition to polyester. As the shrink film, polyvinyl chloride, polypropylene or the like may be used in addition to polyester.

[0013]

As described above, the plastic container of the present invention is fitted by cutting a tubular blow-molded product in which the main body and the lid are integrally molded of a single resin into two by cutting. Since the compatible container body and lid are formed,
Since only one mold is required, the manufacturing cost can be kept low, and since both are made of the same resin, there is no need for a separation operation when collecting the container, and the resin used can be effectively recycled. Can be used.

Further, since it is wrapped with a shrink film, it is possible to prevent the container body and the lid from coming off, and moreover, by printing a desired pattern on the shrink film, it is possible to re-attach a label or the like. It can be in the form of a product.

Further, after use, the plastic container can be used as a small container, and in this case, the blowing hole can be used as a savings box by forming a slit shape through which a coin can pass.

[Brief description of drawings]

FIG. 1 is a side view of a blow-molded product.

FIG. 2 is a top view of the same.

3 is a partially enlarged sectional view of FIG.

FIG. 4 is a partially enlarged cross-sectional view showing a state where the container body and the lid are fitted and fixed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blow molded product 2 Main body part 2'Container main body 3 Lid part 3'Lid body 7 Blowing hole

Claims (2)

[Claims] 1. A tubular blow-molded product in which a main body and a lid are integrally molded of a single resin so that an air blowing hole is located on the upper surface of the lid is bisected by cutting. By forming a container body and lid that can be fitted together, the blowing hole on the upper surface of the lid is closed with a moisture-proof tack seal,
A plastic container characterized in that a container body is filled with contents and a lid is fitted to the container, and the periphery thereof is shrink-wrapped. 2. The plastic container according to claim 1, wherein the blowing hole has a slit shape.