Peel-Openable Package With Cutouts And Adhesive Bonding
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Solution Overview
Problem
Conventional peel-openable packages are prone to content leakage due to easy breakage during transportation, requiring thick materials that complicate folding and opening, leading to inefficiencies in production and increased costs.
Innovation Solution
A peel-openable package design featuring an inner and outer member with a foldable portion, where cutouts in both members cross the folding direction and are separated by a predetermined interval, allowing for easy peeling without breaking, ensuring the content is extracted smoothly and preventing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flat member is made thick to prevent breakage during transportation, then the reliability of the package is improved, but the ease of folding and opening deteriorates
Solution Approach 1:
The package is divided into an inner member and an outer member that can be peeled apart from each other. The inner member contains the content while the outer member provides protection. This segmentation allows the package to maintain integrity during transport while enabling easy opening by simply peeling the outer member away, without requiring thick materials for strength.
Solution Approach 2:
An adhesive layer is introduced as an intermediary between the inner member and outer member. This adhesive layer provides controlled bonding that allows the members to stay together during transport for protection, but can be easily separated by peeling forces during opening, resolving the contradiction between maintaining integrity and enabling easy opening.
2Reliability
If the flat member is made thick to prevent breakage, then the reliability is improved, but the productivity deteriorates due to difficult folding
Solution Approach 1:
By separating the package into inner and outer members with a peelable adhesive bond, the structure becomes easier to assemble and fold during production. The outer member can be independently positioned and bonded to the inner member, allowing for faster assembly compared to working with a single thick piece that requires careful folding and sealing operations.
3Ease of operation
If a break-openable line is used for opening, then the ease of operation is improved, but the reliability deteriorates due to easy breakage during transportation
Solution Approach 1:
Instead of designing a package that breaks easily to open (conventional approach), this invention inverts the approach by designing a package that is difficult to open normally but opens easily through peeling. The adhesive bond is designed to resist breaking during transport but allows controlled separation through peeling forces, providing both reliability and ease of opening.
Solution Approach 2:
The adhesive layer acts as a mediator that provides the necessary bonding strength during transport to maintain package integrity, while allowing easy separation during opening through peeling forces. This resolves the contradiction by providing a mechanism that is strong under compression (transport) but weak under peeling (opening).
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 package allows for simple and efficient opening of the content while maintaining package integrity, enabling thinner materials and faster production processes, reducing the risk of leakage and maintaining product hygiene.
Implementation Method 1
Facing surfaces of the inner member and the outer member facing each other are bonded together by an adhesive layer provided between the facing surfaces such that the facing surfaces are peelable from each other
Data Source
AI summary
A peel-openable package includes a lid. The led includes a sheet member located at a position corresponding to a container portion of a package main body, and a film member bonded to a surface of the sheet member. Cutouts running in a thickness direction of the members and are formed in a peel region defined in a foldable portion of the members. The cutouts and cross a longitudinal direction L and are away from each other by a predetermined interval extending in the longitudinal direction. Facing surfaces of the sheet member and the film member, which are in the peel region corresponding to an area between the cutouts, are bonded together so as to be peelable from each other by an adhesive layer.