Reactive Fiber Prepregs for Homogeneous Resin Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods face challenges in evenly distributing resin compositions within fiber-reinforced composites, particularly with high viscosity melts and powdered resins, which can lead to inefficient impregnation and require complex, costly processing, and may damage fibers or necessitate additional solvent removal steps.
Innovation Solution
The use of prepregs with reactive fibers and resin compositions, including monomers and oligomers that polymerize to form a low-viscosity matrix, which are applied to fibers and then cured to create a polymerized resin matrix, reducing the need for time-consuming mixing and dispersion steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If powdered resin composition is applied to fibers, then resin distribution is improved, but particle distribution into fiber bulk becomes difficult and requires complex milling processing
Solution Approach 1:
The invention changes the physical state parameter of the resin from powdered solid to liquid form. This parameter change allows the resin to flow and penetrate into the bulk of the fiber mat without requiring complex milling to reduce particle size, while still achieving homogeneous distribution throughout the composite structure.
Solution Approach 2:
The invention uses a simple liquid resin composition that can be applied directly without extensive preprocessing. The liquid resin serves as a temporary carrier that impregnates the fibers during processing and then solidifies, eliminating the need for complex reusable milling equipment and reducing overall process complexity.
2Ease of operation
If temperature is increased to reduce resin viscosity, then resin impregnation into fibers is improved, but resin decomposition occurs
Solution Approach 1:
The invention changes the viscosity parameter through chemical composition selection rather than thermal energy input. By selecting liquid resin compositions with inherently lower viscosity at processing temperatures, the resin can impregnate fibers effectively without exceeding the decomposition temperature threshold, maintaining resin stability while achieving good impregnation.
3Ease of operation
If pressure is increased to drive resin into fibers, then resin impregnation is improved, but fiber damage and distortion occur
Solution Approach 1:
The invention changes the driving force parameter from mechanical pressure to viscous flow. By using liquid resin with appropriate viscosity characteristics, the resin can be driven into the fiber mat through its own flow properties and capillary action during consolidation, eliminating the need for high external pressure that would damage the fibers.
4Ease of operation
If solvent is added to reduce resin viscosity, then resin wetting of fibers is improved, but additional solvent removal steps are required
Solution Approach 1:
The invention uses a liquid resin composition that serves as its own application medium without requiring separate solvent systems. The liquid resin is applied, impregnates the fibers, and then solidifies as part of the curing process, eliminating the need for separate solvent removal steps and reducing overall processing time.
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 approach simplifies the process of creating fiber-reinforced composite articles by eliminating the need for extensive resin application and dispersion, enhancing the homogeneity and integrity of the composite while minimizing processing damage to fibers.
Implementation Method 1
The reactive resin composition includes monomers and/or oligomers capable of polymerizing into a polymerized resin matrix
Implementation Method 2
The mixture be heated to a polymerization temperature where the monomers, oligomers, or both polymerize
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
Methods of making a fiber-containing prepregs may include drawing unsized fibers from a batch of molten glass. The method may also include applying a sizing composition to the unsized fibers to form a plurality of sized fibers, where the sizing composition includes a first polymerization agent for polymerizing caprolactam. The method may further include weaving the plurality of sized fibers into a fabric. Another step may include melting a reactive resin composition to form a melted reactive resin composition, where the reactive resin composition may include caprolactam. The melted reactive resin composition may be applied to the fabric. The method may further include heating the fabric and the melted reactive resin composition to a polymerization temperature, where the caprolactam polymerizes to form a fiber-resin amalgam including a polyamide. Another step may be to form the fiber-resin amalgam into the fiber-containing prepreg.