Delaminatable Container Bottom Seal Protrusion Design
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Solution Overview
Problem
Conventional delaminatable containers face challenges in maintaining the integrity of the inner layer during cap mounting, leading to potential delamination and leakage, and require complex die structures for production, increasing costs.
Innovation Solution
A delaminatable container design featuring a bottom seal protrusion with a thinner and thicker portion, bent to improve impact resistance, and an enlarged diameter portion with an inner layer support at the mouth to prevent delamination and leakage, along with a method of manufacturing that includes bending the bottom seal protrusion after blow molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple welded layers with penetration portions are used to increase sealing portion strength, then the sealing portion strength is improved, but the die structure becomes complex and production costs increase
Solution Approach 1:
The patent changes the geometric parameters of the bottom seal protrusion by introducing a bent configuration with specific curvature radius (R1) and height (H1). This parameter modification allows the sealing portion to achieve enhanced strength through the bent shape's inherent mechanical advantages rather than through complex multi-layer welding structures, thereby resolving the contradiction between strength improvement and device complexity.
Solution Approach 2:
The patent applies curvature by designing the bottom seal protrusion with a bent shape characterized by a specific curvature radius (R1). This curved geometry provides mechanical strength and impact resistance to the sealing portion without requiring complex die structures with multiple penetration portions, thus achieving strength enhancement while maintaining simple die configuration.
2Adaptability or versatility
If the inner layer is delaminated from the outer layer to enable inner bag shrinking, then the inner bag can shrink with content decrease, but the inner layer may delaminate completely from the outer layer in the mouth causing inner bag to fall out
Solution Approach 1:
The patent applies local quality by creating a bent portion specifically at the mouth area of the container with distinct geometric parameters (curvature radius R2 and height H2). This localized structural modification provides enhanced adhesion stability at the critical mouth region where complete delamination occurs, while maintaining the overall delaminated structure's shrinking capability. The bent portion acts as a local reinforcement that prevents inner bag fallout without compromising the shrinkage function.
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 design enhances the productivity and reliability of the delaminatable container by preventing inner layer delamination and leakage, while simplifying the production process and maintaining the structural integrity of the container.
Implementation Method 1
the bottom seal protrusion is bent
Implementation Method 2
an inner layer delaminated from an outer layer and shrunk with a decrease in the contents
Data Source
AI summary
A delaminatable container excellent in productivity is provided. According to an exemplary aspect, a delaminatable container, includes a container body having an outer shell and an inner bag, the inner bag delaminating from the outer shell and being shrunk with a decrease in contents, wherein the container body includes a bottom seal protrusion protruding from a bottom surface of a storage portion to store the contents, and the bottom seal protrusion is a sealing portion of, in blow molding using a cylindrical laminated parison provided with an outer layer constituting the outer shell and an inner layer constituting the inner bag, the laminated parison and is bent.