Composite with Silane Coupling Covering Layer for Adhesion and Transparency
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Solution Overview
Problem
Existing composites of nonwoven fabric and resin lack high adhesion and transparency, which are essential for applications in illumination devices, projection devices, and image display systems.
Innovation Solution
A composite is created by laminating a curable resin layer or film layer on a nonwoven fabric layer containing fine cellulose fibers with an average fiber width of 2 to 100 nm, using a hybrid adhesive layer composed of organic and inorganic components, such as silsesquioxane, to enhance adhesion and transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a nonwoven fabric is made from fine cellulose fibers to improve transparency, then the transparency increases, but the adhesion to resin layers deteriorates
Solution Approach 1:
A covering layer is introduced as an intermediary between the nonwoven fabric layer and the resin layer. This covering layer contains a silane coupling agent that forms chemical bonds with both the cellulose fibers and the resin, thereby improving adhesion while maintaining the transparency achieved through the use of fine cellulose fibers.
Solution Approach 2:
The covering layer is formed as a composite material containing a silane coupling agent combined with a resin component. This composite structure enables simultaneous achievement of transparency (through the fine cellulose fiber base) and adhesion (through the silane coupling agent that creates chemical bonding interfaces).
2Illumination intensity
If a nonwoven fabric is made from fine cellulose fibers to improve transparency, then the transparency increases, but the strength of the composite deteriorates
Solution Approach 1:
The covering layer acts as a mediator that transfers and distributes mechanical stresses between the resin layer and the fine cellulose fiber nonwoven fabric. The silane coupling agent in the covering layer creates strong chemical bonds that prevent stress concentration at the interface, thereby improving the overall strength of the composite while maintaining transparency.
Solution Approach 2:
The covering layer forms a composite structure that combines the transparency benefits of fine cellulose fibers with the strength-enhancing properties of the silane coupling agent-resin system. This composite approach allows the material to simultaneously achieve high transparency and improved mechanical strength.
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 composite achieves high adhesion between layers, high transparency, and improved strength, making it suitable for applications in illumination devices, projection devices, and image display systems with low haze and high total luminous transmittance.
Implementation Method 1
the covering layer contains a silane coupling agent
Implementation Method 2
enhance adhesion and transparency
Implementation Method 3
high transparency, and improved strength, making it suitable for applications in illumination devices, projection devices, and image display systems with low haze and high total luminous transmittance
Data Source
Figure 1~2
AI summary
It is an object to provide a composite in which the adhesion between a sheet layer and a curable resin layer or a film layer is high, and which has high strength and high transparency. The present invention provides a composite wherein a curable resin layer or a film layer is laminated on the one or both surfaces of the sheet layer with a covering layer interposed therebetween, the sheet layer containing fine fibers with an average fiber width of 2 to 1000 nm.