Camera Module LCP Composition for Ductility and Dimensional Stability
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Solution Overview
Problem
Conventional polymer compositions used in camera module molded parts lack sufficient ductility and impact strength, leading to issues during assembly and use, and often result in poor dimensional stability when heated.
Innovation Solution
A polymer composition comprising 100 parts by weight of liquid crystalline polymer, 50 to 90 parts by weight of inorganic particulate material with a hardness of 2.5 or more, and 1 to 15 parts by weight of epoxy-functionalized olefin copolymer, which achieves a unique balance of tensile elongation, impact strength, and dimensional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fibrous fillers are used to improve strength and other properties of the polymer composition, then the strength is improved, but the dimensional stability of the part when heated deteriorates
Solution Approach 1:
The invention changes the type of filler from fibrous to inorganic particulate material with specific hardness (2.5 or more on Mohs scale) and size (0.1 to 35 micrometers) parameters. This parameter change allows achieving improved strength while maintaining dimensional stability when heated, resolving the contradiction between strength enhancement and dimensional stability.
Solution Approach 2:
The invention creates a composite material system combining liquid crystalline polymer with inorganic particulate fillers and epoxy-functionalized olefin copolymer. This composite approach enables simultaneous achievement of enhanced strength and maintained dimensional stability under heat, overcoming the limitations of conventional fibrous filler systems.
2Stability of the object's composition
If the polymer composition is made more ductile to survive assembly process, then the ductility is improved, but the impact strength may deteriorate
Solution Approach 1:
The invention modifies the polymer composition parameters by incorporating epoxy-functionalized olefin copolymer (1-15 parts by weight) along with specific inorganic particulate fillers. This parameter adjustment achieves optimal balance between ductility (tensile elongation at break of 3.5% or more) and impact strength (Charpy notched impact strength of 6 kJ/m2 or more), resolving the contradiction between these two mechanical properties.
Solution Approach 2:
The invention develops a composite polymer system that integrates liquid crystalline polymer, inorganic particulate fillers, and epoxy-functionalized olefin copolymer. This composite structure provides both sufficient ductility for assembly process survival and adequate impact strength for use, overcoming the trade-off between these properties in conventional single-phase polymers.
Data Source
AI summary
A polymer composition that is capable of exhibiting a unique combination of ductility (e.g., tensile elongation at break), impact strength (e.g., Charpy notched impact strength), and dimensional stability is provided. For example, the polymer composition may contain a liquid crystalline polymer in combination with an epoxy-functionalized olefin copolymer and an inorganic particulate material.