Vehicle Glass Run Slip Coating Composition for Noise Reduction
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Solution Overview
Problem
Conventional slip coating materials for vehicle glass runs face issues with noise and heaviness during door glass operation due to high friction coefficients and inadequate wear resistance, as well as poor color matching with the vehicle body, which affects the stability and aesthetic quality of the coating.
Innovation Solution
A slip coating composition comprising an olefin-based thermoplastic elastomer, ultra-high molecular weight polyethylene, and polypropylene, along with additional components like silicone masterbatch, peroxide crosslinking agent, and pigments, is used to create a material with improved low friction coefficient and wear resistance, and enhanced color matching properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional slip coating materials are used, then manufacturing cost is controlled, but friction coefficient is high causing noise and heaviness during door glass operation
Solution Approach 1:
The patent applies composite materials by combining thermoplastic elastomer (5-20 parts by weight), polypropylene (70-85 parts by weight), and ultra-high molecular weight polyethylene (5-20 parts by weight) to create a slip coating composition that achieves low friction coefficient while maintaining manufacturing feasibility. This composite approach allows the material to exhibit superior lubrication properties and wear resistance compared to conventional single-material coatings.
Solution Approach 2:
The patent utilizes parameter changes by selecting ultra-high molecular weight polyethylene with specific molecular weight range (10^6 to 10^7 g/mol) to optimize the friction coefficient. The high molecular weight parameter enables the material to form a more effective lubricating film, reducing friction between the door glass and glass run, thereby eliminating noise and operation heaviness.
2Ease of operation
If slip coating material with improved friction properties is used, then door glass operation becomes smooth, but wear resistance and appearance maintenance become insufficient
Solution Approach 1:
The patent employs composite materials where thermoplastic elastomer provides low friction for smooth operation, polypropylene contributes wear resistance and structural integrity, and ultra-high molecular weight polyethylene enhances both lubrication and durability. This synergistic composite structure ensures that the slip coating maintains its functional properties over time without degradation.
Solution Approach 2:
The patent applies local quality by ensuring the slip coating material has differentiated functional zones at the molecular level: the thermoplastic elastomer and UHMWPE components provide low-friction surface properties for smooth operation, while the polypropylene matrix provides structural stability and wear resistance, allowing the coating to simultaneously achieve ease of operation and long-term reliability.
3Ease of manufacture
If thermoplastic elastomer material is used for glass run body, then environmental friendliness and manufacturing cost are improved, but friction coefficient and wear resistance require further enhancement
Solution Approach 1:
The patent enhances thermoplastic elastomer by creating a composite system where the base thermoplastic elastomer maintains environmental friendliness and cost-effectiveness, while the addition of polypropylene and ultra-high molecular weight polyethylene significantly improves friction coefficient and wear resistance. This composite approach allows retaining the advantages of thermoplastic elastomer while overcoming its limitations in lubrication performance.
Solution Approach 2:
The patent modifies the material parameters by incorporating ultra-high molecular weight polyethylene with molecular weight of 10^6 to 10^7 g/mol into the thermoplastic elastomer composition. This parameter change in molecular weight enables the composite material to achieve superior friction and wear properties while maintaining the environmental benefits and manufacturing advantages of the thermoplastic elastomer base material.
4Reliability
If slip coating thickness is increased to improve wear resistance, then durability is enhanced, but color matching with vehicle body deteriorates
Solution Approach 1:
The patent uses composite materials where the specific combination of thermoplastic elastomer, polypropylene, and ultra-high molecular weight polyethylene creates a coating with optimized optical properties. The composite structure enables light scattering and absorption characteristics that achieve excellent color matching with the vehicle body, even at coating thicknesses that provide sufficient wear resistance and durability.
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 composition suppresses particle aggregation, forms microprotrusions for reduced friction, maintains appearance quality, and ensures long-lasting performance without wear or thickness changes, ensuring smooth and stable door glass operation with improved noise reduction and color matching.
Implementation Method 1
forms microprotrusions for reduced friction
Implementation Method 2
suppresses particle aggregation
Data Source
AI summary
The present disclosure relates to a slip coating composition for glass run of a vehicle. More specifically, the present disclosure relates to a slip coating composition including: an olefin-based thermoplastic elastomer, polypropylene, and an ultra-high molecular weight polyethylene (UHMWPE) with a weight average molecular weight of 0.4×106 to 1×106 g/mol, and to a slip coating material formed of the composition, and according to the present disclosure, it is possible to improve a low friction coefficient, wear resistance, and color matching properties of the coating material.