Transparent Fiber Composite with Reactive Matrix
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Solution Overview
Problem
Current fiber composite materials for transparent or translucent moldings, films, and coatings face challenges such as brittle fracture under mechanical stress, requiring adhesion promoters that complicate processing and increase costs, and often lack sufficient stress cracking and solvent resistance.
Innovation Solution
A thermoplastic fiber composite material with a chemically reactive matrix that reacts with reinforcing fibers, eliminating the need for adhesion promoters and enhancing transparency, translucency, strength, and solvent resistance, while maintaining a smooth surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesion promoters are added to improve fiber-matrix adhesion, then fiber-matrix adhesion is improved, but processing complexity and costs increase
Solution Approach 1:
The patent removes adhesion promoters from the composite material system by selecting a thermoplastic matrix and reinforcing fibers that inherently possess compatible chemical functionalities, enabling direct chemical bonding without external adhesion promoters, thus simplifying processing and reducing costs
Solution Approach 2:
The patent changes the chemical parameters of the matrix and fiber materials by selecting thermoplastic polymers with specific reactive functional groups (carboxyl, hydroxyl, amine, isocyanate, epoxy) that can directly react with fiber surface groups, enabling chemical bonding through inherent material properties rather than added promoters
2Strength
If conventional fiber composite materials are used to provide strength, then mechanical strength is improved, but transparency and translucency deteriorate
Solution Approach 1:
The patent changes the optical parameters by selecting thermoplastic matrices with appropriate refractive indices and minimizing light-scattering components, while maintaining fiber reinforcement for strength, thus achieving a balance between mechanical properties and optical clarity
Solution Approach 2:
The patent uses a composite material system consisting of transparent/translucent thermoplastic matrices combined with reinforcing fibers that have compatible optical properties, creating a composite that maintains both strength and optical clarity through careful material selection
3Strength
If fiber composite materials are used to provide high strength, then mechanical strength is improved, but brittleness increases leading to catastrophic failure
Solution Approach 1:
The patent uses chemically reactive functional groups on both matrix and fiber surfaces that form curved, flexible chemical bonds rather than rigid mechanical connections, enabling energy dissipation through bond rotation and deformation, thus reducing brittleness and preventing catastrophic failure
Solution Approach 2:
The patent changes the chemical bonding parameters by selecting functional groups with appropriate bond lengths, strengths, and flexibilities that can accommodate stress variations, enabling the composite to transition from brittle to more ductile failure modes
4Strength
If conventional fiber composite materials are used, then mechanical strength is improved, but resistance to stress cracking and solvents deteriorates
Solution Approach 1:
The patent changes the chemical resistance parameters by selecting thermoplastic matrices with inherent resistance to stress cracking and solvent attack, combined with fibers that have compatible chemical functionalities, creating a composite system that maintains both strength and environmental resistance
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 material achieves higher transparency and translucency, improved mechanical strength, and resistance to stress cracking and solvents, reducing processing complexity and costs.
Implementation Method 1
the thermoplastic molding compound A has at least one chemically reactive functionality
Data Source
Figure 1A~1B
Figure 1C
Figure 2A~2B
AI summary
The invention relates to the use of a thermoplastic fiber composite material, containing: a) a thermoplastic molding material A as a matrix, b) a layer of reinforcing fibers B, and c) optionally an additive C, wherein the layer of reinforcing fibers B is embedded in the thermoplastic molding material A, and wherein the thermoplastic molding material A has at least one chemically reactive functionality which reacts with chemical groups at the surface of the reinforcing fiber component B during the production process of the fiber composite material, and wherein the thermoplastic molding material A functioning as a matrix is transparent or translucent and has in relation to matrices, which do not have any chemically reactive functionality, an about 10 % higher transparency or translucency for white light when measured at a layer thickness of 1 mm. Said use according to the invention is particularly suitable for the production of transparent or translucent molding bodies, films and coatings.