Polylactic acid (PLA) is a new type of bio-based and renewable biodegradable material, which is made from starch raw materials proposed by renewable plant resources (such as corn, cassava, etc.). Starch raw material is saccharified to obtain glucose, and then fermented from glucose and certain strains to produce high-purity lactic acid, and then chemical synthesis method is used to synthesize polylactic acid with a certain molecular weight. It has good biodegradability, and can be completely degraded by microorganisms in nature under specific conditions after use, eventually generating carbon dioxide and water, without polluting the environment, which is very beneficial for protecting the environment and is recognized as an environmentally friendly material.
Polylactic acid has good thermal stability, the processing temperature is 170~230℃, and it has good solvent resistance. It can be processed in various ways, such as extrusion, spinning, biaxial stretching, and injection blow molding. In addition to being biodegradable, products made of polylactic acid have good biocompatibility, gloss, transparency, hand feel and heat resistance, as well as certain bacteria resistance, flame retardancy and UV resistance, so they are very useful. Widely used as packaging materials, fibers and nonwovens, etc., currently mainly used in clothing (underwear, outerwear), industry (construction, agriculture, forestry, papermaking) and medical and health fields.
Post time: Sep-19-2022