Tearing Strip Thin Portion for Sealable Easy-Open Containers
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Solution Overview
Problem
Existing containers with zipper tapes suffer from deteriorated sealability due to manufacturing errors causing cuts that pass through the base, and the use of additional protectors or increased resin amounts and manufacturing steps to maintain sealability.
Innovation Solution
A container design featuring a thin portion on the tearing strip, positioned within 20% of its length from the end, formed by pressing, which serves as the cutting endpoint without passing through the base, ensuring sealability without additional members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cut is formed in the film and tearing strip to create a tab for opening, then the container can be opened, but the sealability is deteriorated
Solution Approach 1:
The tearing strip is divided into a thick portion and a thin portion, where the thin portion serves as the cutting endpoint. This segmentation allows the tab to be formed without creating a complete cut through the base, thereby maintaining sealability while enabling opening operation.
Solution Approach 2:
The tearing strip has non-uniform thickness with a specific thin portion located within 20% of its total length from one end. This local quality change creates a controlled cutting endpoint that prevents complete penetration through the base, resolving the contradiction between opening capability and sealability.
2Reliability
If a protector is provided to cover the tab area to maintain sealability, then the sealability is ensured, but the amount of resin used and manufacturing steps increase
Solution Approach 1:
The function of the protector is eliminated by incorporating the sealability maintenance feature directly into the tearing strip structure itself. The thin portion acts as the cutting endpoint, removing the need for separate protector components and reducing manufacturing complexity.
Solution Approach 2:
The sealing function and tab formation function are merged into a single integrated structure. The thin portion of the tearing strip simultaneously provides the cutting endpoint for tab formation and maintains sealability, eliminating the need for separate protectors.
3Ease of operation
If the cut passes through the base due to manufacturing errors, then the tab can be formed, but the sealability is deteriorated
Solution Approach 1:
The thin portion is pre-formed in the tearing strip at a controlled location within 20% of its total length from one end. This beforehand preparation ensures that the cutting process stops at the thin portion without penetrating through the base, preventing manufacturing errors from compromising sealability.
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 thin portion on the tearing strip provides a reliable cutting endpoint, maintaining sealability while reducing the need for additional protectors and resin, thus enhancing manufacturing efficiency and seal integrity.
Implementation Method 1
a thin portion 131 formed by pressing in a vicinity of one end of the tearing strip 122
Data Source
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AI summary
A container is provided that includes: a film forming a container body; and a tape member including a tearing strip and a base, the tearing strip being directly or indirectly bonded to the film, the base being layered on the tearing strip at a side opposite to the film, in which the tearing strip includes a thin portion formed by pressing in the vicinity of one end of the tearing strip.