Bonded Thermoplastic and Thermoset Composite Layers
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Solution Overview
Problem
Existing polymer composite bodies, comprising thermoplastic and thermoset resins, face limitations in achieving optimal structural reinforcement and fluid resistance due to susceptibility to chemical fluids and mechanical properties at high temperatures.
Innovation Solution
A multi-layer body configuration with a thermoplastic layer, a thermoset layer, and a scrim at their interface, where the thermoplastic layer includes reinforcement particles within a thermoplastic matrix, and the thermoset layer includes fiber-reinforcement within a thermoset matrix, with the scrim being made of fiber glass or carbon fibers, enhancing bonding and structural reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer composite body is used, then the structure is simple, but the fluid resistance and structural reinforcement are insufficient
Solution Approach 1:
The composite body is divided into multiple layers including a thermoplastic layer, a thermoset layer, and a scrim layer positioned at their interface. This segmentation allows each layer to contribute specific properties: the thermoplastic layer provides toughness and impact resistance, the thermoset layer provides chemical resistance and structural stability, and the scrim layer enhances fluid resistance and interlaminar bonding.
Solution Approach 2:
The invention uses a hybrid composite structure combining thermoplastic and thermoset resins with a scrim reinforcement. This composite material approach leverages the complementary strengths of different materials to achieve superior fluid resistance and structural reinforcement that cannot be obtained with a single material system.
2Reliability
If thermoplastic resin is used alone, then the processing is easy, but the chemical fluid resistance is insufficient
Solution Approach 1:
The invention merges thermoplastic and thermoset resin systems into a single composite structure. The thermoset layer provides the required chemical fluid resistance while the thermoplastic layer maintains ease of processing through its thermoplastic nature. The scrim layer at the interface ensures strong bonding between the two different resin systems.
Solution Approach 2:
Different regions of the composite body are assigned different material properties: the thermoset layer is positioned where chemical fluid resistance is most critical, while the thermoplastic layer is positioned where processing ease and impact resistance are prioritized. This local optimization allows each material to perform its best function.
3Strength
If thermoset resin is used alone, then the chemical fluid resistance is good, but the impact resistance and toughness are reduced
Solution Approach 1:
The composite structure combines the chemical resistance of thermoset resin with the impact resistance and toughness of thermoplastic resin. The thermoplastic layer absorbs impact energy through its ductile behavior while the thermoset layer maintains structural integrity and chemical resistance, creating a synergistic effect.
Solution Approach 2:
The hybrid thermoplastic-thermoset composite leverages the complementary mechanical properties of both resin types. The thermoplastic phase provides toughness and impact resistance, while the thermoset phase provides stiffness and chemical resistance, achieving a balanced performance profile.
4Strength
If reinforcement particles are added to thermoplastic matrix, then the structural reinforcement is improved, but the processing viscosity increases
Solution Approach 1:
The reinforcement function is segmented between different layers: the thermoplastic layer contains reinforcement particles for structural strengthening, while the separate thermoset layer with its own fiber reinforcement provides additional structural support. This segmentation allows optimization of particle loading in each layer without excessive overall viscosity increase.
Solution Approach 2:
The invention uses a melting point differential between the thermoplastic matrix and reinforcement particles, allowing the matrix to be processed in a molten state with reduced viscosity for easier infiltration, then cooled to provide structural reinforcement. This parameter change (temperature) temporarily reduces viscosity during processing.
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
This configuration improves fluid resistance and structural joining properties, maintaining mechanical integrity at high temperatures and providing enhanced structural support, addressing the limitations of prior composite bodies.
Implementation Method 1
curing and consolidating the thermoplastic layer, the thermoset layer and the scrim together to form a multi-layer body
Implementation Method 2
a multi-layer body configured with a thermoplastic layer, a thermoset layer and a scrim at an interface between the thermoplastic layer and the thermoset layer
Implementation Method 3
A melting point of the thermoplastic matrix is less than a melting point of the plurality of thermoplastic particles
Implementation Method 4
The thermoplastic layer includes a plurality of reinforcement particles within a thermoplastic matrix
Implementation Method 5
The scrim is configured from or otherwise includes fiber glass and/or carbon fiber
Implementation Method 6
a scrim at an interface between the thermoplastic layer and the thermoset layer
Implementation Method 7
The thermoset layer includes fiber-reinforcement within a thermoset matrix
Implementation Method 8
a thermoset layer configured from or otherwise includes a thermoset matrix
Data Source
AI summary
A component is provided that includes a multi-layer body configured with a thermoplastic layer, a thermoset layer and a scrim at an interface between the thermoplastic layer and the thermoset layer. The thermoplastic layer includes a plurality of reinforcement particles within a thermoplastic matrix. The thermoset layer is configured from or otherwise includes a thermoset matrix.