Flame-Retardant Polyester Artificial Hair Filament Composition
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Solution Overview
Problem
Existing polyester artificial hair filaments face challenges with insufficient heat resistance and flame retardancy, as well as issues related to the use of brominated flame retardants, which are heavy, generate harmful gases, and cause environmental pollution. Additionally, phosphorus-based flame retardants result in non-uniform filament discharge and low strength during melt spinning.
Innovation Solution
A flame-retardant polyester artificial hair filament composition comprising a thermoplastic polyester resin, a polymeric brominated polystyrene flame retardant, a polymeric phosphorus flame retardant, a chain extender, and sodium antimonate, with specific weight ratios and molecular weights, is developed to achieve improved strength, elongation, and heat resistance, while avoiding the drawbacks of brominated flame retardants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polyester resin is used to provide heat resistance, then heat resistance is improved, but flame retardancy deteriorates because polyester resin is flammable and easily burned
Solution Approach 1:
The patent uses a composite material system combining polyester resin with both brominated flame retardant (1-10 parts by weight) and phosphorus flame retardant (0.1-5 parts by weight) to achieve simultaneous heat resistance and flame retardancy. This composite approach allows the base polyester resin to provide heat resistance while the flame retardant additives suppress flammability, resolving the contradiction between these two properties.
2Object-affected harmful factors
If brominated flame retardant is used to improve flame retardancy, then flame retardancy is improved, but weight increases due to high specific gravity causing poor wear feeling
Solution Approach 1:
The patent optimizes the concentration parameter of brominated flame retardant to 1-10 parts by weight per 100 parts of polyester resin, and introduces phosphorus flame retardant at 0.1-5 parts by weight. This parameter optimization achieves sufficient flame retardancy while minimizing weight increase and maintaining wear comfort.
3Object-affected harmful factors
If brominated flame retardant is used to achieve flame retardancy, then flame retardancy is improved, but harmful bromine gas is generated during compounding and processing causing worker exposure and environmental pollution
Solution Approach 1:
The patent introduces phosphorus flame retardant as an intermediary substance that works synergistically with brominated flame retardant. The phosphorus component promotes char formation and reduces the decomposition temperature of the brominated flame retardant, thereby suppressing bromine gas generation during processing while maintaining flame retardancy effectiveness.
4Object-affected harmful factors
If phosphorus flame retardant is used to improve flame retardancy, then flame retardancy is improved, but filament discharge becomes non-uniform and strength decreases during melt spinning
Solution Approach 1:
The patent precisely controls the phosphorus flame retardant content at 0.1-5 parts by weight per 100 parts of polyester resin and optimizes the brominated flame retardant ratio at 1-10 parts by weight. This parameter control prevents excessive phosphorus content that would cause non-uniform discharge, while maintaining sufficient flame retardancy and filament strength during melt spinning.
Data Source
AI summary
A flame-retardant polyester artificial hair filaments according to the present invention comprises: (A) 100 parts by weight of a thermoplastic polyester resin; (B) 10-20 parts by weight of a polymeric brominated polystyrene flame retardant; (B) 5-10 parts by weight of a polymeric phosphorus flame retardant; (D) 0.1-3 parts by weight of a chain extender; and (E) 0.5-3 parts by weight of sodium antimonate.