Vehicle Ceiling Material Laminate for Lightweight 3D Forming
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Solution Overview
Problem
Conventional vehicle ceiling materials face challenges in reducing weight while maintaining rigidity and ease of forming into three-dimensional shapes, as glass fiber layers are heavy and difficult to form, and metal foils with higher elastic modulus are prone to tearing and difficult to shape.
Innovation Solution
A vehicle ceiling material configuration using a base material, skin material layer, adhesive layer, and back surface layer, where the adhesive and back surface layers include laminated metal foils and resin films with elongation percentages higher than the metal foils, allowing for lightweight construction, improved rigidity, and ease of forming complex shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If glass fiber layer is used for reinforcing the vehicle ceiling material, then rigidity is maintained, but weight reduction is difficult
Solution Approach 1:
The invention uses a composite structure consisting of a metal foil layer (aluminum or aluminum alloy) combined with a foam core layer. This composite material approach allows achieving the required rigidity through the synergistic effect of the metal skin providing strength and the foam core providing structural support, while the lightweight nature of both materials enables significant weight reduction compared to traditional glass fiber reinforcement
Solution Approach 2:
The invention specifies precise thickness parameters for the metal foil layer (10-100 μm) and the foam core layer to optimize the balance between weight and rigidity. By controlling these dimensional parameters, the ceiling material achieves sufficient structural strength while minimizing weight, resolving the contradiction between weight reduction and rigidity maintenance
2Weight of moving object
If metal foil with high elastic modulus is used to reduce weight, then weight reduction is achieved, but the metal foil is prone to tearing and difficult to form into three-dimensional shapes
Solution Approach 1:
The invention combines metal foil with a foam core layer to create a composite structure that is easier to form than metal foil alone. The foam core provides cushioning and support during forming operations, allowing the metal skin to be shaped into three-dimensional configurations without tearing, while maintaining the weight reduction benefits of using metal foil
Solution Approach 2:
The invention uses thin metal foil (10-100 μm) as the skin material that can be formed into complex three-dimensional shapes. The combination with the foam core layer provides the necessary flexibility and formability, allowing the ceiling material to conform to vehicle interior contours while maintaining structural integrity and achieving weight reduction
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 use of laminated metal and resin films enables a significant weight reduction of at least 20% compared to conventional materials, maintains rigidity, and facilitates the formation of complex shapes without tearing, enhancing manufacturing efficiency and interior design flexibility.
Implementation Method 1
The metal foil and the resin film are laminated with each other so that the layered film has an elongation percentage higher than that of the metal foil
Data Source
AI summary
Provided is a vehicle ceiling material that is lightweight and can be easily formed into a three-dimensional shape while maintaining rigidity. The vehicle ceiling material includes a base material, a skin material layer arranged at a surface on a vehicle interior side in the base material and forming a ceiling surface in a vehicle interior, an adhesive layer between the base material and the skin material layer, and a back surface layer arranged on a surface on a vehicle roof side in the base material. The adhesive layer and the back surface layer each include a layered film. The layered film includes a metal foil having a thickness of at least 10μm and at most 100μm and a resin film laminated with each other, and has an elongation percentage higher than that of the metal foil.