Natural Fiber Interior Panel Coating for Visible Surface Protection

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Solution Overview

Problem

Existing methods for protecting natural fiber surfaces in passenger transport vehicles are complex, costly, and do not effectively preserve the optical and tactile properties of natural fibers, while also being limited in design possibilities due to material restrictions and uneven application of protective coatings.

Innovation Solution

A method using a thin, transparent or tinted protective lacquer layer applied evenly to natural fiber composite elements, which is UV-resistant, abrasion-resistant, and water-repellent, allowing the natural fiber structure to be preserved and enhancing design flexibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a multi-layered protective coating is used to protect natural fibers from UV radiation, scratches, and abrasion, then the protection against external influences is improved, but the manufacturing complexity and cost increase

Engineering Contradiction:
Improveprotection against UV radiation, scratches, and abrasionVSAvoidmanufacturing complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent extracts and addresses only the essential protective functions (UV resistance, scratch resistance, abrasion resistance) by applying a single-layer coating composition rather than multiple separate protective layers. This single layer integrates all necessary protective properties, eliminating the complexity of multi-layer application processes while maintaining comprehensive protection against harmful external factors.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The coating composition is designed to perform multiple protective functions simultaneously - UV protection, scratch resistance, and abrasion resistance are all achieved through one universal coating layer. This multi-functional approach replaces the need for separate specialized layers for each protection type, thereby reducing manufacturing steps and overall complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

If a multi-layered protective coating is applied to natural fiber surfaces, then the resistance to external influences is improved, but the cost of production increases

Engineering Contradiction:
Improveresistance to external influencesVSAvoidproduction cost
Core Design Contradiction:
Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent extracts the essential protective properties and consolidates them into a single coating layer with optimized composition, eliminating the need for multiple sequential coating applications. This reduction from multi-layer to single-layer processing directly decreases material costs, labor costs, and production time while maintaining comprehensive protection against external influences.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent modifies the coating parameters by changing from multiple thin layers to one optimized single layer with specific thickness and composition. This parameter change optimizes the balance between protective performance and production efficiency, reducing the total amount of coating material needed and simplifying the application process, thereby lowering overall production costs.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If a protective coating is applied to natural fiber composite elements, then the durability against physical and chemical influences is improved, but the optical homogeneity of the natural fiber surface deteriorates

Engineering Contradiction:
Improvedurability against physical and chemical influencesVSAvoidoptical homogeneity
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The patent applies the coating with locally optimized properties - the coating composition and thickness are tailored to provide uniform protection across the natural fiber surface while preserving the local optical characteristics of the fibers. This local quality approach ensures that each area of the surface receives appropriate protection without compromising overall optical homogeneity.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The coating composition is designed to provide homogeneous coverage and uniform optical properties across the entire natural fiber surface. The single-layer formulation ensures consistent thickness and composition throughout, avoiding the optical heterogeneity that can arise from multiple coating layers with potential variations in application quality, drying characteristics, and layer adhesion.

Inventive Principle:
Principle #33Homogeneity

4Object-affected harmful factors

If a thick protective coating is applied to protect natural fibers, then the protection against UV radiation and abrasion is improved, but the natural fiber structure becomes less perceptible

Engineering Contradiction:
Improveprotection against UV radiation and abrasionVSAvoidnatural fiber structure perceptibility
Core Design Contradiction:
Object-affected harmful factorsVSShape

Solution Approach 1:

The patent optimizes the coating thickness parameter to achieve the minimum effective thickness that provides sufficient UV and abrasion protection while maintaining the perceptibility of the natural fiber structure. This parameter optimization balances protective functionality with aesthetic requirements, ensuring the coating is thick enough to protect but thin enough to allow the natural fiber characteristics to remain visible and tangible.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The coating is applied with properties that allow it to provide uniform protection while maintaining local transparency or translucency characteristics. The coating composition and thickness are controlled to ensure that the natural fiber structure remains perceptible through or within the protective layer, achieving local quality that combines protection with aesthetic preservation.

Inventive Principle:
Principle #3Local quality

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 method achieves a highly homogeneous and protected natural fiber surface with preserved appearance and feel, offering improved resistance to external influences and easier color matching, while reducing material usage and manufacturing complexity.

Implementation Method 1

The protective layer is heated and fused with the natural fibers

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 2

a protective coating layer applied to the natural fiber surface and surrounding the natural fibers

Methodology Applied
Scientific EffectCoating: Coatings

Data Source

PatentEP3613573B1Lining component for lining an interior of a passenger transport means and method for the production of such a lining component
Publication Date: 2026.02.11 MOTHERSON INNOVATIONS CO LTD
  • EP3613573B1 patent drawingFigure 1A~2D
  • EP3613573B1 patent drawingFigure 2E~3B
  • EP3613573B1 patent drawingFigure 3C~3G

AI summary

The present invention relates to a paneling component (10) for lining the interior (12) of a passenger transport vehicle (14), in particular a vehicle (15), wherein the paneling component (10) comprises a pressed natural fiber composite element (16) with at least one visible side (18) perceptible from the interior (12) of the passenger transport vehicle (14), which forms a natural fiber surface (20) with a structure (21) made of natural fibers (22), and a protective lacquer layer (26) applied to the natural fiber surface (20) and surrounding the natural fibers (22), which is designed such that the structure (21) made of natural fibers (22) is perceptible. The invention further relates to a method for manufacturing such a paneling component (10) and to a passenger transport vehicle (14) with such a paneling component (10).