Biodegradable Fiber Composition Using PHA Resin with 4-HB Units
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Solution Overview
Problem
Biodegradable fibers face challenges in enhancing flexibility, strength, and processability while maintaining environmental friendliness due to limitations in mechanical and thermal properties, and high costs of raw materials, making them difficult to apply in various fields effectively.
Innovation Solution
A composition for biodegradable fibers using a polyhydroxyalkanoate resin with a 4-hydroxybutyrate (4-HB) repeat unit, which has a degradation temperature of 220°C or higher, combined with other biodegradable resins and additives, to enhance mechanical properties and processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable polymers are used to manufacture fibers, then environmental friendliness and biodegradability are improved, but mechanical strength and flexibility deteriorate
Solution Approach 1:
The patent uses a composite system combining polyhydroxyalkanoate (PHA) resin with specific 4-HB repeat units (20-80 wt%) and other biodegradable polymers to create fibers that achieve both high mechanical strength and complete biodegradability. The composite structure allows the 4-HB units to provide crystallinity and strength while the biodegradable nature of all components ensures environmental friendliness.
2Object-affected harmful factors
If biodegradable polymers are used to manufacture fibers, then environmental friendliness is improved, but processability and flexibility deteriorate
Solution Approach 1:
The patent optimizes the degradation temperature parameter of the PHA resin to be 220°C or higher, which allows the material to maintain stability during conventional fiber processing while ensuring complete biodegradability under specific environmental conditions. This parameter optimization enables both good processability and environmental friendliness.
3Duration of action of stationary object
If conventional biodegradable fibers are produced, then biodegradability is improved, but cost increases and physical properties are limited
Solution Approach 1:
The patent introduces 4-hydroxybutyrate (4-HB) repeat units specifically at 20-80 wt% within the PHA resin structure to enhance mechanical properties and processability locally within the polymer matrix, while maintaining the overall biodegradability of the fiber. This localized modification allows cost-effective production with improved physical properties.
Data Source
AI summary
The present invention relates to a composition for a biodegradable fiber and a biodegradable fiber manufactured using same. In detail, according to an embodiment of the present invention, the composition for biodegradable fibers contains a polyhydroxyalkanoate (PHA) resin bearing 4-hydroxybutyrate (4-HB) repeating units and specifically a first PHA resin and/or a second PHA resin, each bearing 4-HB repeating units and meets a degradation temperature (Td 5% weight loss) of 220° C. or higher as measured by a thermal gravimetric analyzer. Thus, the composition is eco-friendly with excellent biodegradability and biocompatibility and can be used to easily manufacture biodegradable fibers having excellent properties.