Fluorinated Copolymer Composition for Injection Moldability and Durability
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Solution Overview
Problem
Existing fluorine-containing polymers face challenges in achieving excellent properties such as 95°C abrasion resistance, solvent crack resistance, low nitrogen permeation, 75°C high-temperature rigidity, 150°C tensile creep resistance, and durability to repeated loads when molded by injection molding, and they are difficult to process due to poor meltability.
Innovation Solution
A fluorine-containing copolymer comprising specific ratios of tetrafluoroethylene (TFE), hexafluoropropylene (HFP), and perfluoro(propyl vinyl ether (PPVE) units, with a controlled melt flow rate, allowing for improved injection moldability and formation of complex shapes with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorinated polymer resin is used to ensure chemical inertness and biocompatibility, then blood compatibility is improved, but heat dissipation performance deteriorates due to low thermal conductivity
Solution Approach 1:
The patent creates a composite material by incorporating inorganic filler particles (such as aluminum oxide, aluminum nitride, or silicon oxide) into the fluorinated polymer resin matrix. This composite structure combines the chemical inertness and biocompatibility of the fluorinated polymer with the high thermal conductivity of the inorganic filler, thereby achieving both blood compatibility and improved heat dissipation performance simultaneously.
2Temperature
If inorganic filler is added to improve heat dissipation, then thermal conductivity is improved, but manufacturing complexity increases due to additional processing steps
Solution Approach 1:
The patent performs preliminary action by pre-modifying the surface of inorganic filler particles with silane coupling agents before compounding them with the fluorinated polymer resin. This pre-treatment ensures proper dispersion and bonding of filler particles within the polymer matrix, simplifying the overall manufacturing process by preventing aggregation and reducing the need for complex post-processing steps to achieve uniform thermal conductivity.
3Stability of the object's composition
If filler particle size is reduced to improve dispersion, then homogeneity is improved, but manufacturing precision deteriorates due to difficulty in controlling particle distribution
Solution Approach 1:
The patent changes the surface chemistry parameter of filler particles by applying silane coupling agent treatment. This parameter change modifies the surface properties of filler particles to be more compatible with the fluorinated polymer resin matrix, enabling better dispersion and more uniform distribution of fine particles without requiring complex manufacturing controls. The surface modification effectively reduces particle aggregation and improves homogeneity.
Data Source
AI summary
There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit, and a perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of the hexafluoropropylene unit of 10.3 to 12.0% by mass with respect to the whole of the monomer units, a content of the perfluoro(propyl vinyl ether) unit of 1.6 to 2.9% by mass with respect to the whole of the monomer units, and a melt flow rate at 372°C of 5.0 to 40.0 g/10 min.