JPH0228188Y2 - - Google Patents

Description

[Detailed explanation of the idea]

Purpose of invention

[Industrial application field]

The present invention relates to a pressure-resistant composite container suitable as a container for carbonated drinks and the like.

[Conventional technology]

As a container to which internal pressure is applied, attempts have been made to use a laminate mainly made of paper or plastic and sealed by heat sealing. However, conventional containers have insufficient pressure resistance. Bottles made by stretch-blowing polyester are used as containers with the necessary pressure resistance, but because the bottom is spherical and unstable, they are either made into a stubby shape or have a separate piece of hakama on the bottom. It is necessary to cover it with a molded product such as. In order to have sufficient pressure resistance, it must be made quite thick.

[Problem that the idea aims to solve]

An object of the present invention is to improve the above-mentioned points and provide a pressure-resistant composite container that is a relatively thin-walled stretch-blown container and can be formed into a long shape. Structure of the idea

[Means to solve the problem]

The pressure-resistant composite container of the present invention, as shown in the drawing,
A container 3 whose body is formed into a conical shape and whose bottom is spherical by stretching and blowing plastic is covered with a conical body member 2 that matches the outer shape of the container and is integrally bonded so that it can stand on its own. The body member 2 is
Plastic film with heat sealability 2
The container 1 is made by winding and heat-sealing sheets in which an intermediate layer is laminated between the sheets to form a cylinder, and folding back the lower end 21.

【Example】

The material for the middle layer of the body material can be sheet-like materials such as paper, aluminum foil, or polyester film.
It may be selected as appropriate depending on the functions required of the container, such as light-shielding properties and gas barrier properties. A material in which heat-sealable plastics are laminated on both sides of the intermediate layer can be easily formed into a cylindrical shape by winding and heat-sealing. As the heat-sealable plastic, appropriate materials such as polyethylene, polypropylene, polyester, etc. are used. Polyester is used as the material for the stretch blow container. The body material and the container may be bonded and integrated by heat sealing all or part of the contact surfaces or by using a hot melt adhesive. It is also possible to insert the cylindrical body material 2 into a blow molding die and form the container by stretch blowing, and at the same time fuse and integrate the containers. Such an embodiment is also included in the term "adhesive integration". The shape of the lid is arbitrary, but a screw cap commonly used for carbonated beverages, especially one made of aluminum, is suitable because it is easy to tighten. of course,
Plastic injection molded parts may also be used.

[Effect]

The conical body of the stretch blow container 3 does not easily deform, and the cylindrical body material 2 reinforces the stretch blow container 3, so that internal pressure is applied when filling the contents. It also tolerates it well. The curved bottom also endures with little deformation. The container can stand on its own due to the body material 2. By folding the lower end of the shell material inward as shown and preferably heat-sealing 6, the lower end of the shell material is reinforced and the appearance becomes beautiful. Effects of the invention In the pressure-resistant composite container of the invention, the entire bottle can withstand the internal pressure that is applied after filling the contents and tightening the lid. This is because the bottom part has a curved shape that is suitable for withstanding pressure, and the body part is reinforced by the body material. If the body material is made of a laminated sheet containing paper, printing can be applied as desired, and a product with a beautiful appearance can be obtained. This container stands on its own at the cylindrical lower end of the body material and has good stability, so it can be made into a long container.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an example of the pressure-resistant composite container of the present invention. 1...Pressure-resistant composite container, 2...Shell material, 3...Stretch blow container, 4...Screw cap.

Claims (1)

[Claims for Utility Model Registration] (1) On the outside of a container 3 whose body is formed into a conical shape and whose bottom is formed into a spherical shape by stretching and blowing plastic,
A conical body member 2 that matches the external shape of the container is placed over the container and integrated with adhesive so that it can stand on its own.The body member 2 is made of a sheet in which an intermediate layer is laminated between two sheets of heat-sealable plastic film. Roll it up and heat seal it to make it into a cylinder, and then seal the bottom end 21.
A pressure-resistant composite container 1 is a folded container. (2) The pressure-resistant composite container 1 according to claim 1 of the utility model registration claim, wherein the lid of the container 3 is a screw cap 4.