[su_frame]Polylactic full name Poly Lactic Acid (PLA), also known as corn starch resin, scientific name Polylactide, a lactide polyester. Polylactic acid is a versatile compostable polymer, extracted entirely from plant starch fermentation → → → polymerization process to wait for the water manufactured from non-toxic. Source corn, sugar beets, wheat, sweet potato starch or sugar biomass and other renewable sources of corn stover, wheat straw, rice stick, bagasse and other lignocellulosic agricultural wastes as biodegradable plastic PLA (Biodegradable Plastics, referred to degradable plastics) of one of them. Be of synthetic linear aliphatic polyester. PLA is used in the early development of medical, surgical sutures and bone nails, etc., now already widely used in some of the more common items, such as: bags, textile fibers. After the formation of decomposition PLA recycling water and carbon dioxide absorption into the plants through photosynthesis after the biological cycle, the relative reduction of the ecological impact; however, the time required is not short, but difficult to identify, the melting point is too low, causing difficulties on recovery, so how into the recovery system is a big problem. Material properties made from 100% renewable resources, non-toxic pure PLA can be completely decomposed. Unlike plastic used oil as a substrate, non-renewable, high density, can not break down naturally. PLA products for a variety of waste treatment: natural decomposition, composting, recycling duplicate reduction and reuse, incineration. Heat generated lower than traditional plastic, can release CO2 absorbed by photosynthesis and after reaching carbon neutral effect, reducing atmospheric greenhouse effect. The glass transition temperature Tg of about 58 ~ 60 ℃, higher in biodegradable material, but because it is the linear structure of the polymer, the lack of heat resistance and strength of the material, and therefore the application side is restricted. Can be used in combination with other polymer compounds manner of plastic raw materials in order to improve its performance to the desired mechanical properties of some products, but you must know, depending on the relative composition of the additive will produce environmental protection, recycling and other issues, lost the use of non-original damage purpose of environmental materials. Although the polymer can be completely decomposed, but in general the atmosphere and stored in warehouses and not decomposed, only under the following environment will all have the rapid decomposition reaction:. A sufficient water vapor (relative humidity of 90 .. above%) b sufficient oxygen (non-confined environment) c appropriate temperature (58 ~ 70 ℃) Suitable processing methods are: vacuum molding, injection molding, blow molding, extrusion, foaming, transparent film, laminating film, cling film, paper lamination and the like. [/su_frame]

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