Composite Container Paper Label Adhesion via Biaxial Blow Molding
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Solution Overview
Problem
Conventional composite containers with synthetic resin bodies and paper labels require complex and costly processes for integration and adhesion, limiting cost reduction and stability.
Innovation Solution
The composite container is manufactured by disposing a paper label in a mold and performing biaxial stretch blow shaping with a liquid as a pressurized medium, adhering the paper label to the container body without the need for additional adhesive layers or separate attachment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a paper label is attached separately after container body shaping, then the container body can be formed independently, but the manufacturing process becomes complex and costly
Solution Approach 1:
The patent combines the container body forming process with the paper label attachment process into a single integrated operation. The paper label is placed in the mold before injection molding, allowing both the container body and label attachment to occur simultaneously during the injection process, thereby eliminating separate attachment steps and reducing overall process complexity
Solution Approach 2:
The paper label is positioned and prepared in the mold before the injection molding process begins. This preliminary placement ensures the label is correctly positioned and ready for attachment, eliminating the need for post-forming attachment operations and simplifying the manufacturing workflow
2Reliability
If a protrusion is provided on the base to prevent paper tube from coming off, then the paper tube is held on the base, but an additional adhesion process is still required
Solution Approach 1:
The mechanical retention feature (protrusion) and chemical adhesion (adhesive application) are merged into a single integrated attachment process. The adhesive is applied during injection molding while the protrusion provides mechanical retention, achieving both functions simultaneously without requiring separate operations
Solution Approach 2:
The solution combines mechanical retention (protrusion structure) with chemical bonding (adhesive material) to create a composite attachment mechanism. This dual approach ensures reliable paper label retention while maintaining manufacturing efficiency through integration
3Reliability
If a separate adhesion process is provided for the paper label, then secure adhesion is achieved, but manufacturing costs increase
Solution Approach 1:
The adhesion process is merged with the container body forming process. The adhesive is applied during injection molding, allowing simultaneous container formation and label adhesion, which eliminates separate adhesion equipment and operational costs while maintaining secure attachment
Solution Approach 2:
The injection molding process itself provides the adhesion function through integrated adhesive application. The system uses its own forming process to simultaneously create the container and attach the label, eliminating the need for external adhesion equipment and reducing manufacturing costs
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
This method simplifies the manufacturing process, securely adheres the paper label to the container body, and eliminates the need for separate adhesion steps, enhancing production efficiency and reducing costs.
Implementation Method 1
biaxial stretch blow shaping with a liquid as a pressurized medium, adhering the paper label to the container body
Data Source
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AI summary
A composite container (1) according to the present invention is a container formed by a paper label being adhered to at least one of the top end edge outer circumferential surface and the bottom end edge outer circumferential surface of the base part (22) of a container body (20) by disposing the paper label in a mold, and biaxial stretch blow shaping a preform with a liquid as a pressurized medium.