Synthetic Resin Multiple Containers

Abstract

The present invention provides a synthetic resin multiple container. It can reduce dead space regardless of the size of the outer port. A synthetic resin multiple container (1) includes an outer shell bottle (2), a synthetic resin inner container body (3), and an air passage (23). The outer shell bottle (2) has a shoulder (5) connected to the outer mouth (4), and a body (6) connected to the shoulder (5); the inner container body (3) has a The cylindrical inner mouth (17) and the inner container body (18) in the outer mouth (4) of the outer mouth (4), the inner container body (18) is connected with the inner mouth (17) and has an outer shell bottle (2) The shape formed by the shape of the inner surface and deformed by the external pressure, the air passage (23) is formed between the outer mouth (4) and the inner mouth (17) and flows to the outer shell bottle (2) and the inner container body (3) Introduce outside air in between. The inner peripheral surface of the inner mouth part (17) is provided with a small diameter part (24) whose inner diameter is smaller than the inner diameter of the opening end of the inner mouth part (17).

Description

technical field [0001] The present invention relates to a synthetic resin multiple container provided with an inner container arranged in an outer bottle. Background technique [0002] Conventionally, there has been known a synthetic resin-made multiplex bottle (for example, refer to Japanese Patent Laid-Open No. 2013-245010 and Japanese Patent Laid-Open No. 2010-082916 ) which is arranged inside an outer casing bottle that can be restored to its original shape with respect to external pressure. The inner container body is deformed by reducing the volume by external pressure (hereinafter, sometimes referred to as "reduction deformation"), and external air is introduced between the outer bottle and the inner container body. [0003] The synthetic resin multi-bottle reduces the volume and deforms the inner container by pressing the body of the outer bottle to pour out the contents contained in the inner container. On the other hand, when the pressing of the body is released, t...

AI Technical Summary

Problems solved by technology

[0009] In a multi-container, in order to discharge all the contents, the void remaining in the limit state of the inner container body of the multi-container, that is, the void that has not been completely crushed (hereinafter referred to as "ineffective space" ( When the dead space)) is larger than the space where the gas filled with the content exists (hereinafter referred to as "head space"), there is a problem that the content of the dead space cannot be completely discharged using the gas capacity of the head space

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