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Polyhydroxyalkanoic acid fibers with high strength, fibers with high strength and high modulus of elasticity, and processes for producing the same
Polyhydroxyalkanoic acid fibers with high strength, fibers with high strength and high modulus of elasticity, and processes for producing the same
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机译:具有高强度的聚羟基链烷酸纤维,具有高强度和高弹性模量的纤维及其制造方法
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摘要
The present invention is a process for producing a fiber, comprising: melt-extruding polyhydroxyalkanoic acid; solidifying the polyhydroxyalkanoic acid by quenching it to its glass transition temperature +15° C. or less, to form an amorphous fiber; cold-drawing the amorphous fiber at its glass transition temperature +20° C. or less; and subjecting the fiber to heat treatment under tension. The present invention can provide: a process for producing a fiber with high strength, and the fiber produced through the process; and a process for producing a fiber with high strength and high modulus of elasticity and the fiber with high strength and high modulus of elasticity produced through the process, regardless of molecular weights of PHAs varying depending on origins such as a wild type PHAs-producing microorganism product, a genetically modified product, and a chemical product.
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