Layered Container Seal With Pull Tab for Tamper-Evident Opening
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Solution Overview
Problem
Existing container sealing technologies lack a tamper evident function and are inconvenient to open, leading to issues such as incomplete removal causing recycling difficulties and potential for malicious tampering, while also posing safety risks during opening.
Innovation Solution
A container sealing body with a large opening tab and a layered structure that includes a surface layer, synthetic resin layer, and blocking layer, allowing for easy peeling and complete removal, ensuring tamper evidence and recyclability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong welding sealing is used to provide tamper evident function, then consumer protection from external malicious behavior is improved, but the opening process becomes dangerous and may cause content release or user injury
Solution Approach 1:
The sealing body is divided into multiple layers (upper layer with synthetic resin and lower layer with aluminum foil) bonded by thermal bonding resin, allowing controlled separation along predetermined cutting lines during opening while maintaining strong sealing when closed
Solution Approach 2:
Opening initiation guide cutting lines are pre-formed on the sealing body to guide the tearing process, allowing safe and controlled opening without exposing users to dangerous sealed structures
2Ease of operation
If peelable seal is used to enable easy opening, then ease of operation is improved, but the sealing body can be reattached to the container, eliminating tamper evident function
Solution Approach 1:
The thermal bonding resin layer is positioned specifically between the upper and lower layers to provide controlled bonding strength that allows easy peeling during opening but prevents reattachment during sealing, creating different local properties for these two functions
Solution Approach 2:
The sealing body combines synthetic resin layer, aluminum foil layer, and thermal bonding resin layer to achieve both easy peeling capability and tamper evident function through the composite structure's unique properties
3Ease of operation
If protruding opening tabs are used to facilitate opening, then ease of operation is improved, but the tabs can be caught by cap screws causing sealing deterioration
Solution Approach 1:
The opening tab is designed to extend in a different spatial dimension relative to the sealing body surface, allowing it to be accessed for opening while avoiding interference with cap screws in the sealing dimension
4Ease of operation
If sealing body is not completely removed from container, then ease of operation is improved, but recycling capability is lost due to residue remaining on inlet
Solution Approach 1:
The sealing body is designed to be completely separable from the container through controlled peeling along the inlet, allowing the container to be fully recovered for recycling while the sealing body is discarded after serving its protective 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 solution provides a convenient, safe, and complete opening mechanism with tamper evidence, preventing reuse and ensuring recyclability by ensuring the entire sealing body is removed, thus addressing safety and recycling issues.
Implementation Method 1
a thermal bonding resin layer configured between the upper layer and the lower layer and thermally bonded by thermal bonding resin
Implementation Method 2
the container is opened as the opening tab provided at an upper end at a center of the sealing body is pulled upward, and a sealing layer, which includes aluminum foil, which is a lower layer of the sealing body, and a thermal sealing resin layer, is cut and torn to the inlet of the container along an opening initiation guide cutting line connected to the opening tab
Implementation Method 3
the lower layer includes a blocking layer for preventing transmission of oxygen or moisture
Data Source
AI summary
Disclosed is a container sealing body applied to seal an inlet of a container, the container sealing body including: an upper layer; a lower layer provided below the upper layer; and a thermal bonding resin layer configured between the upper layer and the lower layer and thermally bonded by thermal bonding resin, in which the upper layer includes: a surface layer provided for printing and configured to prevent thermal bonding; and a synthetic resin layer having tensile strength and hardness and configured sequentially with the surface layer from above to below, an opening tab is configured by cutting and punching the upper layer, an opening initiation guide cutting line is formed at one side of the opening tab, the lower layer includes a blocking layer for preventing transmission of oxygen or moisture, and a thermal bonding sealing layer, and the synthetic resin layer of the upper layer and the blocking layer of the lower layer are bonded.