Double container of synthetic resin by direct blow molding method

Abstract

With respect to a double container of synthetic resin composed of an inner container and an outer container, the conventional problems, such as restraints on configuration and need to have an assembly step, are solved. As main means for solving the problems, there is provided a double container by direct blow molding method, comprising an outer layer and inner layer of synthetic resins nonadherent to each other and, interposed therebetween, an air space formed by separation due to a molding shrinkage difference between the outer layer and the inner layer at direct blow molding.

Description

technical field [0001] The present invention relates to a synthetic resin double-layer container in which a space is formed between an outer layer and an inner layer by direct blow molding. Background technique [0002] Patent Document 1 describes an invention related to a double-layer container in which a cylindrical container outer body and a container inner body are assembled and fixed with an assembly cap. Such a double-layer container is used, for example, as a thermally insulated container utilizing a double wall, or in the field of cosmetic material containers to make the outer body of the container transparent, and to give the inner body of the container a suspension in the outer body of the container. Such a decorative container. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2004-352327 [0004] Here, since the double-walled container described in Patent Document 1 is a structure in which the inner body of the container is inserted into the outer body ...

AI Technical Summary

Problems solved by technology

[0004] Here, since the double-walled container described in Patent Document 1 is a structure in which the inner body of the container is inserted into the outer body of the container and assembled and fixed with the assembly cap, it is necessary to insert the inner body of the container into the outer body of the container, thus, there is a need to enlarge the mouthpiece. In addition, there are also problems such as parts, parts, or assembly processes that need to be used to assemble two containers.

Images