Delamination Container Release Agent Layer Optimization
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Solution Overview
Problem
Existing synthetic resin delamination containers face issues with peeling resistance and moldability due to strong adhesion between the inner and outer layers during blow molding, leading to insufficient peeling and creaking when dispensing content liquids, especially when made from polyethylene terephthalate resin.
Innovation Solution
A delamination container with a release agent layer applied to the inner surface of the outer preform and/or outer surface of the inner preform, with an applying amount per unit area of 10 to 850 mg/m2, to reduce peeling resistance and enhance moldability, allowing easy peeling and precise shaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If heat-resistant silicone oil is applied to the inner surface of the outer preform or outer surface of the inner preform to reduce peeling resistance, then the storage portion can be peeled more easily from the body portion, but moldability of the container in blow molding is decreased and creaks are not sufficiently reduced
Solution Approach 1:
The patent applies a release agent with a specifically controlled applying amount per unit area (10 to 850 mg/m²) to the preform surfaces. This parameter optimization resolves the contradiction by finding the optimal dosage range that provides sufficient peeling ease while maintaining moldability and minimizing creaks during blow molding.
2Device complexity
If the outer layer body and inner layer body are both made of polyethylene terephthalate resin to maintain material consistency, then the container structure is simplified, but the peeling resistance of the storage portion with respect to the body portion further increases causing creaking
Solution Approach 1:
The patent introduces a release agent as an intermediary substance applied between the inner layer body and outer layer body (both made of PET resin). This mediator reduces the adhesion and peeling resistance between the two layers, enabling easy peeling while maintaining the simplicity of using identical materials for both layers.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The delamination container achieves easy peeling of the storage portion from the body portion and precise molding into a predetermined shape, reducing peeling failures and creaking, while maintaining the quality of the content liquid by minimizing contact with outside air.
Implementation Method 1
at least either one of an inner surface of the outer preform and an outer surface of the inner preform being applied with a release agent... a release agent layer formed by the release agent... reducing peeling resistance
Data Source
AI summary
A synthetic resin delamination container formed by blow molding a preform assembly having an outer preform and an inner preform, at least either one of an inner surface of the outer preform and an outer surface of the inner preform being applied with a release agent. The delamination container has: an outer layer body including an outer mouth portion and a bottomed tubular body portion being continuous with the outer mouth portion; an inner layer body including an inner mouth portion and a volume-reducible and deformable storage portion peelably laminated on an inner surface of the body portion through a release agent layer formed by the release agent; and an outside air introduction port configured to introduce outside air between the outer layer body and the inner layer body, in which an applying amount per unit area of the release agent layer is 10 to 850 mg/m2.