Wet Sheet Package Label Structure for Reclosable Airtight Sealing
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Solution Overview
Problem
Conventional wet sheet flexible packages experience reduced airtightness and rapid drying of impregnated liquids due to microscopic gaps between sealing members and the film bag surface, caused by the deformation of adhesive labels and the rigidity difference between the sealing member and the film bag.
Innovation Solution
A wet sheet flexible package design featuring a substrate with higher compression strength than the film bag, positioned between the adhesive layer and the film bag surface, to prevent deformation and gap formation when the sealing member is attached, ensuring a tight seal and preventing liquid volatilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a self-adhesive label is repeatedly peeled off and reattached, then the dispensing opening can be opened and closed for taking out wet sheets, but the airtightness becomes lower and the wet sheets stored in the film bag tend to be dry
Solution Approach 1:
A substrate with higher compression strength than the film bag is introduced as an intermediary between the adhesive layer and the film bag surface. This substrate acts as a mediator that prevents the adhesive from deforming when the sealing member is attached, thereby maintaining airtightness while allowing repeated opening and closing operations
Solution Approach 2:
The compression strength parameter of the substrate is specifically increased to be higher than that of the film bag. This parameter change ensures that the substrate maintains its shape and prevents adhesive deformation under compression from the sealing member, resolving the contradiction between ease of operation and airtightness
2Reliability
If a plastic molded member is attached to an adhesive layer on a flexible film bag, then the sealing member can be attached to seal the dispensing opening, but microscopic gaps are generated between the attached molded member and the surface of the adhesive due to deformation of the film bag and adhesive
Solution Approach 1:
A substrate with higher compression strength is introduced as an intermediary layer between the adhesive and the film bag. This substrate prevents the adhesive from deforming when the sealing member is pressed against it, eliminating microscopic gaps and ensuring precise attachment
Solution Approach 2:
The compression strength of the substrate is changed to be higher than that of the film bag. This parameter change ensures that the substrate maintains its dimensional stability under compression, preventing gap formation and improving attachment precision between the sealing member and adhesive
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 maintains the wet condition of the sheets over a longer period by preventing liquid volatilization and ensuring a secure attachment of the sealing member to the adhesive layer without generating gaps, enhancing the airtightness and usability of the package.
Implementation Method 1
a substrate provided between the adhesive layer and the surface of the film bag, and composed of a film having higher compression strength than a film composing the film bag
Implementation Method 2
an adhesive layer exposed around the dispensing opening on the surface of the film bag
Data Source
AI summary
The present invention relates to a wet sheet flexible package 1, including a plurality of wet sheets 2 impregnated with a liquid; a film bag 3 that is a flexible film bag packaging the plurality of wet sheets 2 and including a dispensing opening 31; and a label 5 attached to a surface of the film bag 3, covering the dispensing opening 31, and being able to be peeled off. In the wet sheet flexible package 1, when the label 5 is peeled off from the film bag 3, the dispensing opening 31 is unsealed and an adhesive layer 53 is exposed around the dispensing opening 51 on the surface of the film bag 3. A substrate 54 is provided between the adhesive layer 53 and the surface of the film bag 3, and the substrate 54 is composed of a film having a higher compression strength than a film composing the film bag 53.