How polylactic acid polymer

Polylactic acid polymerization method, there are two, one is in a solvent under reduced pressure by the direct polymerization of lactic acid, namely: lactic → → polylactic acid prepolymer; Another way is under pressure cyclic lactic acid dimer polymerization raw materials, namely: magnessium lactate prepolymer → → → polylactic acid cyclic dimer.
Polylactic acid fiber is a new fully biodegradable synthetic fibers, the Department obtained from cereals, after disposal of its products in the soil or seawater decomposed by microorganisms to carbon dioxide and water, do not emit toxic gases when burned, will not pollution. Academic research on many of polylactic acid fiber, mainly in Japan, Kanebo represented. From corn, sugar cane or beet by fermentation and distillation extraction of lactic acid, polylactic acid polymerized by solution spinning method to obtain a polylactic acid fiber, Japan Kanebo polylactic acid fiber of the tradename Lactron, the properties shown in Table 1, As can be seen from the table, the polylactic acid with a polyester fiber having almost the same strength and elongation, Young's modulus is low, the fabric relatively soft material is an excellent fabric. Lactron can be processed into short fiber, multifilament and monofilament form, Calcium lactate, wool or viscose biodegradable fibers, can be obtained similar silk fabrics, underwear and shirts and other apparel is made, not only durable, moisture absorption but also by working in an excellent shape stability and anti-wrinkle properties.