Silicone Rubber Wiper Blade Coating for Chattering Reduction
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Solution Overview
Problem
Conventional silicone rubber wiper blades experience chattering and noise due to water-repellent treatments, and require a chlorine surface treatment process, which complicates manufacturing and reduces durability.
Innovation Solution
A coating composition for silicone rubber wiper blades comprising 65-80% organic solvent, 5-15% binder, 15-18% solid lubricant with 33-83% boron nitride, and 1-5% additive, which improves water-repellency and wiping durability without the need for chlorine treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-repellent treatment is applied to glass, then water repellency is improved, but contact area between glass and wiper blade rubber increases causing chattering and noise
Solution Approach 1:
A coating composition containing solid lubricants (boron nitride, graphite) and silicone rubber powder is applied as an intermediary layer between the wiper blade rubber and the water-repellent glass surface. This intermediary coating reduces direct contact and friction, eliminating chattering and noise while preserving water repellency.
Solution Approach 2:
The coating composition changes the surface properties of the wiper blade rubber by incorporating specific ratios of solid lubricants (33-83 wt% boron nitride, 38-46 wt% graphite) and silicone rubber powder (10-30 wt%). This parameter optimization creates a low-friction surface that prevents chattering without affecting water repellency.
2Ease of manufacture
If conventional coating compositions are used, then manufacturing process is simplified, but wiping durability and water-repellency are insufficient
Solution Approach 1:
The coating composition uses a composite formulation combining silicone rubber powder (10-30 wt%), solid lubricants including boron nitride (33-83 wt%) and graphite (38-46 wt%), and organic solvent (65-80 wt%). This composite material provides both excellent wiping durability and water-repellency while maintaining ease of application.
Solution Approach 2:
The specific weight ratios of components in the coating composition are optimized to achieve the desired performance. The organic solvent content (65-80 wt%) ensures proper viscosity for application, while the balanced composition of solid lubricants and silicone rubber powder delivers both durability and water-repellency without complex manufacturing steps.
3Ease of operation
If solid lubricant amount is increased, then lubricity is improved, but coating composition stability deteriorates
Solution Approach 1:
The solid lubricant content is precisely controlled at 15-18 wt% of the total coating composition, with boron nitride comprising 33-83 wt% and graphite 38-46 wt% of the solid lubricant portion. This parameter optimization maintains adequate lubricity while preventing composition instability and ensuring uniform coating application.
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 significantly enhances water-repellency and wiping durability, reduces chattering, and simplifies the manufacturing process by eliminating the chlorine surface treatment, while maintaining lubricity and strength.
Implementation Method 1
a solid lubricant 15-18 wt. %, wherein the solid lubricant comprises boron nitride in an amount of 33-83 wt. % based on 100 wt. % of the solid lubricant
Implementation Method 2
a coating composition for a silicone rubber wiper blade which has excellent wiping durability and water-repellent properties
Implementation Method 3
an organic solvent 65-80 wt. %; a binder 5-15 wt. %
Data Source
AI summary
This disclosure relates to a coating composition for a silicone wiper blade and a rubber wiper blade using the same. More particularly, this disclosure relates to a coating composition for a silicone rubber wiper blade which has excellent wiping durability and water-repellent properties, and a silicone rubber wiper blade which does not require a chlorine surface treatment process using the coating composition for a silicone rubber wiper blade.