Aromatic Polymer Composition for Camera Module Wear Resistance
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Solution Overview
Problem
Liquid crystalline polymers used in camera modules are prone to wear due to their highly oriented structure, leading to skin layer peeling and poor performance.
Innovation Solution
A polymer composition combining aromatic polymers with a tribological formulation containing a fluorinated additive and a siloxane polymer, which reduces surface friction and wear while maintaining mechanical properties, is developed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If liquid crystalline polymers are used due to their highly oriented crystal structure for easy molding into small and complex parts, then manufacturing precision and ease of manufacture are improved, but the polymer becomes susceptible to wear and skin layer peeling
Solution Approach 1:
The patent applies composite materials by combining liquid crystalline polymer with aromatic polyamide in a specific weight ratio range (30:70 to 70:30). This composite structure allows the LCP component to provide molding precision while the aromatic polyamide component enhances wear resistance and prevents skin layer peeling, thus resolving the contradiction between manufacturing precision and reliability
Solution Approach 2:
The patent changes the compositional parameters by controlling the weight ratio of LCP to aromatic polyamide within specific ranges. By optimizing this parameter, the material achieves both the high molding precision characteristic of LCP and the improved wear resistance provided by aromatic polyamide, resolving the technical contradiction
2Ease of manufacture
If liquid crystalline polymers are used for their highly oriented structure, then ease of manufacture is improved, but skin layer peeling occurs leading to poor appearance and performance
Solution Approach 1:
The composite of LCP and aromatic polyamide creates a synergistic effect where LCP maintains molding ease while aromatic polyamide forms a protective structure that prevents skin layer peeling and improves surface durability, thus resolving the contradiction between ease of manufacture and resistance to harmful surface degradation
Solution Approach 2:
The patent applies local quality by having different material components perform different functions: LCP provides the bulk molding characteristics while aromatic polyamide specifically addresses the surface layer to prevent peeling. This localized functional differentiation resolves the contradiction between manufacturing ease and surface integrity
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 polymer composition achieves a low dynamic coefficient of friction and wear depth, along with excellent mechanical properties such as impact strength and thermal stability, minimizing skin layer peeling and enhancing camera module performance.
Implementation Method 1
The tribological formulation contains a fluorinated additive and a siloxane polymer... The polymer composition exhibits a dynamic coefficient of friction of about 0.4 or less
Data Source
AI summary
A polymer composition that contains an aromatic polymer in combination with a tribological formulation is provided. The polymer composition may exhibit a low degree of surface friction that minimizes the extent to which a skin layer is peeled off during use of a part containing the composition (e.g., in a camera module). For example, the polymer composition may exhibit a dynamic coefficient of friction of about 1.0 or less and/or a wear depth may be about 500 micrometers or less as determined in accordance with VDA 230-206:2007.