Multilayer Composite Plate for Deep-Drawability and Impact Strength
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Solution Overview
Problem
Current composite material plates lack the ability to achieve high deep-drawability, stiffness, impact strength, and lightweight properties simultaneously, particularly in thermoformable materials that can be shaped three-dimensionally while maintaining mechanical strength and stability over time, especially under extreme environmental conditions.
Innovation Solution
A multilayer plate composed of a first layer of thermoplastic material mixed with non-vegetal fibres or particles forming a three-dimensional structure, combined with a polymeric coating layer and optionally a firewall layer, optimized through chemical-physical adhesion and varying layer thicknesses to enhance mechanical strength, impact resistance, and thermoformability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the plate uses conventional single-layer thermoplastic material with mineral fibres, then it can achieve lightweight and thermoformability, but it cannot simultaneously achieve high mechanical strength, stiffness, and impact strength
Solution Approach 1:
The patent applies composite materials by combining a thermoplastic matrix (polyolefin) with non-vegetal fibres (glass, carbon, aramid, or natural fibres) and particles to create a multilayer plate. This composite structure allows the material to achieve high mechanical strength, stiffness, and impact strength while maintaining lightweight properties and thermoformability, directly resolving the contradiction between strength and structural simplicity.
Solution Approach 2:
The patent segments the material structure into multiple layers: a first layer comprising the thermoplastic matrix with fibres and particles, and a second layer comprising a polymeric coating. This segmentation allows each layer to perform specific functions - the first layer provides structural strength and stiffness while the second layer provides protection and surface properties, thereby achieving high mechanical strength without excessive complexity.
2Strength
If the plate increases fibre content to improve impact strength, then impact resistance improves, but weight increases and thermoformability deteriorates
Solution Approach 1:
The patent optimizes the parameters of the composite material by controlling the ratio of fibres to matrix material and selecting specific fibre types (glass, carbon, aramid, or natural fibres) with different density and strength characteristics. By adjusting these parameters, the plate achieves high impact strength while minimizing weight increase and maintaining thermoformability, as the optimised fibre-matrix ratio prevents excessive weight gain.
Solution Approach 2:
The use of composite materials with carefully selected fibre types and ratios allows the plate to achieve high impact strength without proportional weight increase. The thermoplastic matrix provides a lightweight base while the fibres reinforce impact resistance, creating a composite that outperforms conventional materials in impact strength-to-weight ratio.
3Strength
If the plate uses high fibre-to-matrix ratio to improve stiffness, then stiffness improves, but thermoformability and flexibility deteriorate
Solution Approach 1:
The patent optimizes the fibre-to-matrix ratio parameter to achieve the desired balance between stiffness and thermoformability. By controlling this parameter and selecting appropriate fibre types, the plate achieves sufficient stiffness for structural applications while maintaining enough flexibility and thermoformability for three-dimensional shaping, resolving the contradiction between stiffness and adaptability.
4Adaptability or versatility
If the plate is designed for high three-dimensional deformability with strain >10x thickness, then deep-drawability improves, but mechanical strength and dimensional stability deteriorate
Solution Approach 1:
The composite structure with thermoplastic matrix and reinforced fibres provides the necessary ductility and strength combination for deep-drawability. The matrix material allows for large deformations while the fibres maintain mechanical strength, enabling the plate to achieve three-dimensional deformations up to 10-100 times the thickness without losing structural integrity.
Solution Approach 2:
The two-layer segmented structure allows the first layer to undergo large deformations while the second coating layer provides surface protection and maintains dimensional stability. This segmentation enables high deep-drawability while preserving mechanical strength and stability over time.
5Weight of moving object
If the plate uses conventional materials to achieve lightweight, then weight reduces, but fire resistance and stability over time deteriorate
Solution Approach 1:
The composite structure combines lightweight thermoplastic material with reinforcing fibres and particles to achieve high strength-to-weight ratio. The inclusion of fire-resistant fibre types and particles in the composite structure maintains fire resistance and dimensional stability over time while preserving the lightweight advantage.
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 multilayer plate achieves high mechanical strength, impact resistance, and thermoformability, allowing for three-dimensional deformations up to 10-100 times the plate thickness, with low weight and recyclability, while maintaining fire resistance and dimensional stability.
Implementation Method 1
a first layer of composite material which is coupled on at least one face with a second layer by means of chemical-physical adhesion
Implementation Method 2
the plate allows simultaneous optimization of conflicting properties, such as in particular: limited weight, increased mechanical strength and, in particular, good impact strength and stiffness, which make it possible to use it in the coatings applications, for example for car interiors, with particularly demanding geometric properties, i.e. with strain in a direction perpendicular to the bidimensional extension of a starting plate which are up to an order of magnitude of at least 10, preferably 50 and in some cases even up to 100 times the thickness of a starting plate, said three-dimensional deformations being obtainable by achieving a capacity to be three-dimensionally deformable by means of thermoforming processes
Data Source
AI summary
A multilayer composite plate or panel includes a first layer of a thermoplastic material coupled to another material layer adhering to the first layer with a chemical or physical process. The first layer includes a mixture made from a matrix of a thermoplastic material, in particular of the polyolefin family, and non-vegetal fibers or particles with an aspect ratio greater than 9, preferably 10-12 in the case of needle-like fibers or 40-70 in the case of lamellar particles, which are present as groupings or bundles having a predetermined length and forming a three-dimensional structure of contiguous elements layered together. The second layer has a coating that includes synthetic or natural fibers bonded together mechanically or with a physico-chemical process.