Cork-Particle Artificial Leather Coating for Lightfast Interiors
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Solution Overview
Problem
The limited use of cork in vehicle interior design is due to its limited light stability and sensitivity to soiling and fading, as well as the need for materials with innovative appearances and good haptic properties that are also sustainable and cost-effective for large-scale industrial production.
Innovation Solution
A method for producing a cork-containing film or artificial leather with a layered structure using polyurethane or polyvinyl chloride, where cork particles are pretreated to reduce water content, and a surface coating is applied to enhance mechanical properties and sustainability, incorporating UV stabilizers for improved lightfastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cork particles are used in vehicle interior materials, then sustainability and haptic properties are improved, but light stability deteriorates causing fading
Solution Approach 1:
A clear varnish coating is applied as an intermediary layer over the cork particles. This varnish layer acts as a protective mediator that shields the cork particles from UV radiation and environmental factors, preventing fading while maintaining the natural cork appearance and haptic properties visible and tangible at the surface.
Solution Approach 2:
The invention creates a composite material system combining cork particles with polyurethane or polyvinyl chloride binder, topped with a protective varnish coating. This multi-layer composite structure integrates the sustainability and haptic benefits of cork with the light stability and protective properties of the varnish, resolving the contradiction between natural material benefits and durability.
2Ease of operation
If cork particles are mixed into the outer paint layer, then water absorption and feel are improved, but light stability deteriorates
Solution Approach 1:
The solution moves from a two-dimensional paint layer to a three-dimensional layered structure. Cork particles are embedded within the paint layer to provide haptic properties, while a separate third dimension (the clear varnish coating) is added on top to provide UV protection and light stability, allowing both requirements to be satisfied in different spatial dimensions.
3Shape
If a web-like structure of plastic layer is used between cork particles, then suede-like surface is achieved, but strength deteriorates and sensitivity to soiling increases
Solution Approach 1:
The invention changes the binder ratio and composition parameters to create a more robust matrix. Instead of using minimal binder forming only webs, the patent uses a higher proportion of polyurethane or polyvinyl chloride binder (at least 1:1 ratio with cork particles), creating a denser, stronger structure that maintains the suede-like appearance while significantly improving mechanical strength and soiling resistance.
4Shape
If ground cork is mixed with polyurethane in ratio 1:2, then suede-like surface is produced, but mechanical strength deteriorates
Solution Approach 1:
The invention optimizes the binder-to-cork ratio parameter from the conventional 1:2 to at least 1:1, and potentially higher binder content. This parameter change increases the plastic matrix content, creating a stronger, more cohesive structure that maintains the desired suede-like surface morphology while significantly improving mechanical strength and durability for industrial applications.
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 results in a material with enhanced mechanical properties, improved lightfastness, and a sustainable, cost-effective solution for vehicle interiors, offering a pleasant touch and innovative appearance while reducing the risk of blistering and fading.
Implementation Method 1
the cork particles are pretreated to reduce the water content in the cork particles
Implementation Method 2
incorporating UV stabilizers for improved lightfastness
Data Source
Figure 1~2
Figure 2A
Figure 2B
AI summary
The invention relates to a method for producing a film (100) containing cork particles or an artificial leather (200) containing cork particles with a layer structure (120; 220) with at least one layer (126; 224) based on polyurethane or polyvinyl chloride and a surface coating (130; 230 ). The method includes pretreating the cork particles (128; 228) to reduce the water content in the cork particles, preparing a starting material for layer production, producing the layered structure (120; 220), with at least one layer (126, 224) of the layered structure (120 ; 220) is formed from the starting material and forming the surface coating (130; 230) by applying a lacquer to the layered structure (120; 220), the cork particles (128, 228) being embedded in the starting material or in the lacquer or in the starting material and the paint are mixed in. Furthermore, the invention relates to a film containing cork particles and an artificial leather containing cork particles.