Modified Nylon 66 Fiber Heat Wear Resistance
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Solution Overview
Problem
Current modified nylon 66 fibers lack sufficient fluidity and are not suitable for fabric applications due to poor heat and wear resistance, limiting their use to automotive and electronic parts.
Innovation Solution
A modified nylon 66 fiber composition incorporating a first repeating unit from adipic acid and hexamethylenediamine, a second monomer unit with a long carbon chain, a third monomer unit with an aromatic ring, and a fourth monomer unit from a cyclic diacid, enhancing heat resistance, wear resistance, and allowing for low denier fiber production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modified nylon 66 is used to improve heat resistance and wear resistance, then heat resistance and wear resistance are improved, but fluidity deteriorates and the material cannot be made into spun fiber
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating specific monomer units (aromatic rings, cyclic structures, long carbon chains) in controlled amounts (0.1-10 wt% each) to modify the polymer's thermal and mechanical properties while maintaining processability. This resolves the contradiction by adjusting compositional parameters to achieve both high reliability and manufacturability
Solution Approach 2:
The patent creates a composite polymer structure by combining modified nylon 66 with multiple different monomer units that have complementary properties. The aromatic rings provide heat resistance, cyclic structures enhance wear resistance, while long carbon chains maintain fluidity. This composite approach allows simultaneous achievement of improved reliability and ease of manufacture
2Reliability
If modified nylon 66 is used to improve heat resistance and wear resistance, then heat resistance and wear resistance are improved, but the material is limited to automotive and electronic parts applications
Solution Approach 1:
By adjusting the weight percentages of different monomer units within specific ranges (0.1-10 wt%), the patent creates a family of materials with tunable properties. This enables adaptation to different application requirements, expanding versatility while maintaining the core heat and wear resistance benefits
Solution Approach 2:
The patent designs a multi-functional polymer material that simultaneously provides heat resistance, wear resistance, and improved fluidity. This universal material can serve multiple application domains including textiles, automotive, and electronics, thereby expanding adaptability while preserving reliability
3Reliability
If modified nylon 66 is used to improve heat resistance and wear resistance, then heat resistance and wear resistance are improved, but denier per fiber increases
Solution Approach 1:
The patent modifies the polymer's molecular parameters by incorporating monomer units with long carbon chains that enhance fluidity and reduce intermolecular friction. This allows the production of finer fibers (lower denier) while maintaining the heat and wear resistance properties provided by the aromatic and cyclic structures
Data Source
AI summary
A modified nylon 66 fiber including a first repeating unit derived from adipic acid and hexamethylenediamine, a second monomer unit derived from a diacid or a diamine having a long carbon chain, a third monomer unit derived from a diacid or a diamine having a aromatic ring, and a fourth monomer unit derived from a cyclic diacid or a cyclic diamine is provided. The second monomer unit has 6 to 36 carbon atoms. The third monomer unit has 8 to 14 carbon atoms. The fourth monomer unit has 6 to 10 carbon atoms. Based on a total weight of the modified nylon 66 fiber, a content of the first repeating unit is 78 wt % to 94.8 wt %, a content of the second monomer unit is 0.1 wt % to 1 wt %, a content of the third monomer unit is 5 wt % to 20 wt %, a content of the fourth monomer unit is 0.1 wt % to 1 wt %.