Linerless Adhesive Body Composition for Adhesion Retention
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Solution Overview
Problem
Adhesive bodies without a release liner experience a reduction in adhesive force during storage and transportation.
Innovation Solution
Incorporating a base polymer and a tackifying resin with a weight average molecular weight of 1,500 or less in the adhesive composition, ensuring excellent compatibility and uniform dispersion, thereby preventing adhesive force reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the adhesive body is configured without a release liner to reduce waste and simplify structure, then device complexity and waste are reduced, but adhesive force is reduced during storage and transportation
Solution Approach 1:
The invention changes the chemical composition parameters of the adhesive by incorporating a specific low molecular weight tackifying resin (weight average molecular weight 1,500 or less) in a controlled amount (5-100 parts by mass per 100 parts by mass of base polymer). This parameter change enables the adhesive to maintain its adhesive force during storage and transportation without requiring a release liner, thus resolving the contradiction between simplified structure and maintained reliability.
Solution Approach 2:
The invention creates a composite adhesive system by combining a base polymer with a low molecular weight tackifying resin. This composite material formulation provides both the structural integrity needed for storage without a release liner and the adhesive force retention required for reliable performance, simultaneously addressing both the simplification and reliability requirements.
2Reliability
If a release liner is provided to maintain adhesive force during storage, then adhesive force is maintained, but waste increases and process becomes more complex
Solution Approach 1:
The invention extracts and removes the release liner component from the adhesive body system by formulating an adhesive composition that inherently maintains its adhesive force during storage. The low molecular weight tackifying resin enables the adhesive to self-maintain its properties without the release liner, thereby eliminating waste associated with the liner while preserving adhesive force reliability.
Solution Approach 2:
The adhesive composition is designed to be self-sufficient by incorporating the low molecular weight tackifying resin, which enables the adhesive to maintain its adhesive force during storage and transportation on its own without requiring a release liner. This self-service capability eliminates the need for the release liner and associated waste.
3Reliability
If a release liner is provided to maintain adhesive force during storage, then adhesive force is maintained, but the manufacturing process becomes more complex
Solution Approach 1:
The invention extracts the release liner from the manufacturing process by developing an adhesive formulation that inherently maintains its adhesive force during storage. The low molecular weight tackifying resin enables this self-maintaining property, simplifying the manufacturing process by eliminating the release liner application step while ensuring adhesive force reliability.
4Stability of the object's composition
If the tackifying resin has lower molecular weight to improve compatibility and dispersion, then homogeneity is improved, but adhesive composition becomes more sensitive to formulation parameters
Solution Approach 1:
The invention carefully controls the molecular weight parameter of the tackifying resin (1,500 or less) and its content in the adhesive composition (5-100 parts by mass per 100 parts by mass of base polymer). This precise parameter control achieves excellent compatibility and uniform dispersion while managing formulation sensitivity, as the specific low molecular weight range provides optimal balance between dispersibility and adhesive performance.
Data Source
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AI summary
The present invention provides an adhesive body in which a reduction in adhesive force after the adhesive body is stored and transported is prevented even in a configuration in which a release liner is not provided. The present invention relates to an adhesive body including an adhesive, in which an adhesive composition forming the adhesive contains a base polymer and a tackifying resin having a weight average molecular weight of 1,500 or less.