Making process of medical fiber
A manufacturing method and fiber technology, which are applied in the field of biomaterial fiber manufacturing, can solve the problems of long recovery time, excessive fiber degradation, and inapplicability, and achieve the effects of simple processing and wide source of raw materials.
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Embodiment 1
[0008] Embodiment 1. Select the raw material of beta-hydroxybutyric acid and beta-hydroxyvaleric acid copolymer (abbreviated as PHBV) whose number average molecular weight is 240000, through drying, adopt the method that melt extrusion combines with wet molding, control melt temperature Spin PHBV as-spun fibers at 182°C at a spinning speed of 800m / min. After the as-spun fibers are stretched 4 times, they are set in a sizing box at 80°C for 1 hour to obtain PHBV finished fibers. The fineness of the finished fiber is 64 dtex, the breaking strength is 2.1 cN / dtex, and the breaking elongation is 42%.
Embodiment 2
[0009] Embodiment 2. Select the raw material of beta-hydroxybutyric acid and beta-hydroxyvaleric acid copolymer (abbreviated as PHBV) whose number average molecular weight is 700000, through drying, adopt the method that melt extrusion combines with wet molding, control melt temperature PHBV as-spun fibers were spun at 240°C at a spinning speed of 3000m / min. After the as-spun fibers were stretched 1.95 times, they were set in a sizing box at 150°C for 72 hours to obtain PHBV finished fibers. The fineness of the finished fiber is 3dtex, the breaking strength is 4.2cN / dtex, and the breaking elongation is 80%.
Embodiment 3
[0010] Embodiment 3. Select the raw material of beta-hydroxybutyric acid and beta-hydroxyvaleric acid copolymer (abbreviated as PHBV) whose number average molecular weight is 50000, through drying, adopt the method that melt extrusion combines with wet molding, control melt temperature PHBV as-spun fibers were spun at 170°C at a spinning speed of 400m / min. After the as-spun fibers were stretched 8 times, they were set in a sizing box at 50°C for 36 hours to obtain PHBV finished fibers. The fineness of the finished fiber is 80 dtex, the breaking strength is 1.5 cN / dtex, and the breaking elongation is 57%.
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