Translucent UV-Stable Composite Layers for Vehicle Interior Surfaces

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Solution Overview

Problem

Existing highly translucent composite structures lack UV protection properties.

Innovation Solution

A composite structure comprising a film layer made of thermoplastic elastomer and a lacquer layer, both containing UV stabilizers, is designed to maintain translucency while providing UV protection by optimizing layer thickness and composition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the composite structure uses thin film layers to maintain translucency, then light transmittance is improved, but UV protection capability deteriorates

Engineering Contradiction:
Improvelight transmittanceVSAvoidUV protection capability
Core Design Contradiction:
Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent applies composite materials by combining thermoplastic elastomer with UV stabilizers in the film layer and lacquer layer. This composite structure enables the material to simultaneously achieve high light transmittance (maintaining translucency) and effective UV protection, resolving the contradiction between transparency and UV resistance.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent optimizes parameters including layer thickness (film layer: 50-500 μm, lacquer layer: 3-50 μm), UV stabilizer concentration (0.1-5 mass%), and wavelength range (400-700 nm) to achieve the desired balance between light transmittance and UV protection. By carefully adjusting these parameters, the composite structure maintains translucency while providing adequate UV shielding.

Inventive Principle:
Principle #35Parameter changes

2Object-affected harmful factors

If UV stabilizers are added to the composite structure, then UV protection is improved, but light transmittance deteriorates

Engineering Contradiction:
ImproveUV protectionVSAvoidlight transmittance
Core Design Contradiction:
Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The patent optimizes the concentration of UV stabilizers (0.1-5 mass%) and layer thicknesses to achieve effective UV protection while maintaining high light transmittance. By carefully controlling these parameters, the composite structure provides UV shielding without excessive light blocking.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent applies UV stabilizers selectively in both the film layer and lacquer layer, ensuring uniform distribution throughout the composite structure. This local quality approach ensures consistent UV protection across the entire material while maintaining optical properties.

Inventive Principle:
Principle #3Local quality

3Illumination intensity

If the composite structure is made thin to maintain translucency, then visual perception of bulky additives is improved, but structural strength deteriorates

Engineering Contradiction:
ImprovetranslucencyVSAvoidstructural strength
Core Design Contradiction:
Illumination intensityVSStrength

Solution Approach 1:

The patent uses composite materials with thermoplastic elastomer as the base matrix, which provides inherent flexibility and strength. The elastomer matrix supports the bulky additives (size ≥50 μm) while maintaining the overall thinness of the structure, ensuring both translucency and structural integrity.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent employs thin film structures (film layer: 50-500 μm, lacquer layer: 3-50 μm) that are sufficiently thin to allow visual perception of bulky additives through translucency, yet thick enough to provide adequate structural strength and flexibility.

Inventive Principle:
Principle #30Flexible shells and thin films

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 composite structure achieves high light transmittance and effective UV protection, allowing visual perception of bulky additives and protecting both the material and underlying structures from UV light.

Implementation Method 1

both the film layer and the lacquer layer are translucent and contain a UV stabilizer

Methodology Applied
Scientific EffectUV absorption: Absorption (EM radiation)

Data Source

PatentUS20250381765A1Composite structure containing translucent layers with UV protection properties
Publication Date: 2025.12.18 TMG TECIDOS PLASTIFICADOS E OUTROS REVESTIMENTOS PARA A IND STRIA AUTOMOVEL SA

AI summary

A UV resistant composite structure containing a translucent structure composed of a film layer and a lacquer layer coating the film layer, wherein the film layer is made of a thermoplastic elastomer, has a thickness of 50 to 500 μm, and contains a UV stabilizer, and wherein the lacquer layer differs from the film layer in its composition, has a thickness of to 50 μm, and contains a UV stabilizer, wherein the UV stabilizers protect the layers and bulky additives contained in a support layer; and the use of the composite structure as a surface material in the interior of a vehicle.