Steering Wheel Synthetic Leather Composition for Wrinkle-Resistant Durability
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Solution Overview
Problem
Conventional synthetic leather for steering wheel covers lacks sufficient light resistance, heat aging resistance, chemical resistance, and softness, leading to wrinkles and poor durability when used for curvy surfaces.
Innovation Solution
A synthetic leather composition comprising a microfiber nonwoven fabric as the fiber base layer, an urethane porous layer, an urethane adhesive layer, and a polyurethane skin layer, where the polyurethane resin is polymerized with polycarbonate-based, fluorine-based, and ester-based polyols, enhancing physical properties like light resistance, heat aging resistance, and softness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polyurethane skin coating layer is used, then manufacturing process is simple, but light resistance is insufficient for steering wheel covering requirements
Solution Approach 1:
The patent changes the chemical parameters of the polyurethane polymerization process by incorporating specific polyol compounds (polycarbonate-based polyol, fluorine-based polyol, and ester-based polyol) in controlled weight ratios. This parameter modification enhances the light resistance of the skin coating layer to meet steering wheel covering requirements while maintaining process feasibility
Solution Approach 2:
The patent creates a composite polyurethane resin system by combining multiple types of polyol compounds (polycarbonate-based, fluorine-based, and ester-based polyols) with isocyanate compound. This composite material approach achieves superior light resistance and durability properties that single-component polyurethanes cannot provide
2Reliability
If conventional synthetic leather is used, then cost is lower, but heat aging resistance and chemical resistance are reduced
Solution Approach 1:
The patent modifies the chemical composition parameters of the polyurethane resin by incorporating heat-resistant and chemically resistant polyol compounds (particularly polycarbonate-based and fluorine-based polyols). These parameter changes enhance thermal stability and chemical resistance to withstand steering wheel operating conditions
Solution Approach 2:
The patent develops a composite polyurethane resin system combining multiple polyol types with complementary properties - polycarbonate-based polyol for heat resistance, fluorine-based polyol for chemical resistance, and ester-based polyol for flexibility. This multi-component composite achieves superior overall performance
3Reliability
If conventional synthetic leather with short-fiber nonwoven fabric is used, then manufacturing is easier, but wrinkle property and softness are insufficient
Solution Approach 1:
The patent changes the physical parameters of the fiber base by transitioning from short-fiber nonwoven fabric to long-fiber microfiber nonwoven fabric with high density. This parameter change fundamentally improves the fabric's ability to resist wrinkling and provides a softer, more leather-like hand feel
Solution Approach 2:
The patent applies different fiber characteristics to different functional requirements - long fibers provide structural integrity and wrinkle resistance, while the microfiber structure provides softness. The high density configuration locally optimizes the fiber arrangement to prevent gap formation at sewn holes
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 solution provides improved durability, wrinkle resistance, and softness similar to natural leather, making it suitable for steering wheel covers by enhancing light resistance, heat aging resistance, chemical resistance, and fouling resistance.
Implementation Method 1
a polyurethane skin layer including a polyurethane resin prepared by polymerizing an isocyanate compound and a polyol compound including polycarbonate-based polyol, fluorine-based polyol and ester-based polyol
Implementation Method 2
an urethane adhesive layer including an urethane-based adhesive for adhering the urethane porous layer and the skin layer
Data Source
AI summary
The present invention relates to a synthetic leather for a steering wheel cover of a vehicle, and a method for preparing the same. The synthetic leather including a fiber base layer (101) including a microfiber nonwoven fabric, an urethane porous layer (102) formed on the fiber base layer, a polyurethane resin skin layer (104) formed on the urethane porous layer, and prepared by polymerizing an isocyanate compound and a polyol compound including polycarbonate-based polyol, fluorine-based polyol and ester-based polyol, and an adhesive layer (103) for adhering the urethane porous layer and the skin layer.