Adhesive Sheet With Protective Layer Resolving Blocking And Skin Damage
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Solution Overview
Problem
Adhesive sheets without a release liner face challenges in protecting the adhesion surface from foreign matter and skin damage, while also preventing unintentional adhesion and contamination.
Innovation Solution
An adhesive sheet with a protective layer on at least a part of the adhesive layer surface, which can include antistatic agents, hard coat agents, lubricants, heat dissipating materials, and other functional components, eliminating the need for a release liner and ensuring skin safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a release liner is used to protect the adhesion surface, then foreign matter adhesion is prevented, but blocking occurs and skin damage may happen
Solution Approach 1:
A protective layer is introduced as an intermediary between the adhesive layer and the external environment. This protective layer serves as a mediator that prevents foreign matter from reaching the adhesive surface while avoiding the harmful effects of traditional release liners, including blocking and skin irritation.
Solution Approach 2:
The protective layer is designed with specific parameter characteristics including low tackiness to prevent blocking, appropriate thickness (1-10 μm) to balance protection and adhesion, and specific material composition (fluororesin, silicone resin, or acrylic resin) to prevent skin damage while maintaining foreign matter resistance.
2Object-generated harmful factors
If the adhesive layer surface is exposed without protection, then blocking is prevented, but foreign matter adhesion and skin damage occur
Solution Approach 1:
The protective layer acts as a mediator that provides protection against foreign matter and skin contact while maintaining the blocking-free characteristic. It creates a barrier function without the excessive adhesion properties that cause blocking.
Solution Approach 2:
The protective layer is applied selectively to specific regions where protection is needed, with controlled thickness and material properties that provide localized protection against foreign matter and skin damage while preserving the adhesive functionality in contact areas.
3Object-affected harmful factors
If a protective layer is added to the adhesive sheet, then foreign matter protection is improved, but manufacturing complexity increases
Solution Approach 1:
The protective layer and adhesive layer are combined into a single integrated structure where the protective layer is directly formed on or bonded to the adhesive layer. This merging eliminates the need for separate release liner components and simplifies the manufacturing process while maintaining protection functionality.
Solution Approach 2:
The protective layer utilizes composite material structures combining different resin types (fluororesin, silicone resin, acrylic resin) with specific thickness and composition ratios to achieve multiple functions (protection, low blocking, skin safety) in a single layer, reducing overall system complexity.
Data Source
AI summary
Disclosed is an adhesive sheet having an adhesive layer 2 on at least a part of one side or both sides of a base 1, characterized in that a protective layer 3 is provided on at least a part of the surface of the adhesive layer 2. The adhesive layer 2 is preferably an expandable adhesive layer, and the protective layer 3 is preferably a hot-melt protective layer. The protective layer 3 may contain a functional component such as an antistatic agent, a coloring agent, a hard coating agent, a lubricant, a heat dissipating material, a metal deactivator and an antioxidant. This adhesive sheet can protect an adhesion surface and does not cause blocking and skin disorders even if a release liner is not used, and is also excellent in various functions.