Thermoplastic Prepreg Foam Structural Insulation
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Solution Overview
Problem
Conventional polyurethane and polyisocyanurate foam products lack the mechanical strength and stiffness required for structural insulation applications due to the absence of thermoplastic prepreg outer layers, which are essential for enhancing durability and impact resistance.
Innovation Solution
The development of thermoplastic prepreg based foam products, which include a foam core sandwiched between thermoplastic prepreg layers, where the thermoplastic material is fully or partially impregnated within the fabric or web of fibers, and a system for manufacturing these products using a belt or conveyor mechanism, foam applicator, heating mechanism, and laminator to control the thickness and bonding of the foam core with the prepreg layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional foam products are used without thermoplastic prepreg outer layers, then manufacturing simplicity is maintained, but mechanical strength and stiffness are insufficient for structural applications
Solution Approach 1:
The patent applies composite materials by combining foam core with thermoplastic prepreg outer layers to create a multi-material structure that achieves both high mechanical strength and structural performance while maintaining manufacturing efficiency through integrated bonding
2Reliability
If thermoplastic prepreg layers are added to foam products, then impact resistance and durability are enhanced, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the foam core and thermoplastic prepreg layers into an integrated composite structure where the layers are bonded together through heating and pressing, creating a unified product that delivers enhanced durability and impact resistance through combined material properties
3Strength
If thermoplastic material is fully impregnated within fiber fabric, then structural integrity is improved, but foam mixture penetration into fibers is prevented reducing mechanical coupling
Solution Approach 1:
The patent applies local quality by controlling the impregnation level of thermoplastic material within fibers to achieve optimal balance - sufficient impregnation for structural integrity while maintaining some fiber accessibility for mechanical coupling with foam mixture, creating zone-specific material distribution
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 thermoplastic prepreg based foam products exhibit significantly greater strength, stiffness, and thermal insulation properties, making them suitable for structural applications while maintaining lightweight characteristics, and are more resistant to impact and damage compared to conventional foam products.
Implementation Method 1
The heating mechanism is configured to heat the thermoplastic prepreg and the foam mixture to cause the foam mixture to react atop the thermoplastic prepreg and form a foam core bonded with the thermoplastic prepreg
Implementation Method 2
The foam applicator is configured to apply a foam mixture atop the thermoplastic prepreg... to cause the foam mixture to react atop the thermoplastic prepreg and form a foam core
Implementation Method 3
The thermoplastic material is polymerized from monomers and oligomers in which greater than 90% of the monomers or oligomers react to form the thermoplastic material
Implementation Method 4
The laminator is configured to press the thermoplastic prepreg and foam mixture to control a thickness of the thermoplastic prepreg product
Data Source
AI summary
A system for manufacturing a thermoplastic prepreg product includes a belt or conveyor, a prepreg applicator that positions a thermoplastic prepreg atop the belt or conveyor, a foam applicator that applies a foam mixture atop the thermoplastic prepreg, a heating mechanism that heats the thermoplastic prepreg and the foam mixture to cause the foam mixture to react atop the thermoplastic prepreg, and a laminator that is configured to press the thermoplastic prepreg and foam mixture to control a thickness of the resulting thermoplastic prepreg product. The thermoplastic prepreg includes a fabric, mat, or web of fibers and a thermoplastic material that is impregnated within the fabric, mat, or web of fibers. The thermoplastic material is formed from in situ polymerization of monomers and oligomers. The foam mixture includes an isocyanate, a polyol blend, and a blowing agent.