Pressure-Sensitive Adhesive Sheet Using Beta-Glucan Composite
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Solution Overview
Problem
Conventional pressure-sensitive adhesive sheets using β-1,3-glucan films exhibit low adhesion, leading to issues where the adhesive layer remains on the adherend instead of peeling off with the film, resulting in poor adhesion between the substrate and the pressure-sensitive adhesive layer.
Innovation Solution
A pressure-sensitive adhesive sheet is developed with a substrate containing a first β-1,3-glucan derivative, where an acyl group is introduced into β-1,3-glucan, combined with a resin such as rosin-based, terpene-based, or petroleum-based resin, enhancing adhesion between the substrate and the pressure-sensitive adhesive layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a film containing β-1,3-glucan is used as a substrate for a pressure-sensitive adhesive sheet, then the environmental load is reduced due to the use of biomass-derived materials, but the adhesion between the substrate and the pressure-sensitive adhesive layer becomes low
Solution Approach 1:
The substrate is constructed as a composite material containing both β-1,3-glucan (biomass component) and a specific resin. This composite structure maintains the environmental benefits of biomass materials while the resin component provides the necessary adhesion properties to prevent peeling failures.
Solution Approach 2:
The invention modifies the chemical composition parameters of the substrate by introducing specific resin components into the β-1,3-glucan matrix. This parameter change transforms the substrate from having poor adhesion to having excellent adhesion while retaining its biomass-derived characteristics.
2Object-affected harmful factors
If the substrate contains only β-1,3-glucan derivative, then the environmental friendliness is maintained, but the adhesion to the pressure-sensitive adhesive layer is insufficient causing peeling failure
Solution Approach 1:
The substrate combines β-1,3-glucan derivative with specific resin components to create a composite material that exhibits both environmental compatibility and high adhesion strength. The resin acts as an adhesive promoter within the composite structure.
Solution Approach 2:
The resin component is specifically introduced at the interface region between the substrate and the pressure-sensitive adhesive layer to enhance local adhesion properties without compromising the overall environmental benefits of the biomass-derived substrate.
Data Source
AI summary
An adhesive composition contains a β-1,3-glucan derivative having a degree of substitution of the acyl group of 2.6 or more and less than 3.0, and an isocyanate-based crosslinking agent. A pressure-sensitive adhesive tape includes a pressure-sensitive adhesive layer formed from the adhesive composition.