PLA, also known as polylactic acid a polymerized from poly lactic acid. Polylactic acid has an excellent biodegradability, compatibility and absorption, it is a non-toxic, non synthetic polymer material .lts raw material is polylactic acid,which is mainly derived from fermentation of starch ,such as com and rc . It can also be obtained from cellulose, kitchen garbage or fish waste.
PLA has a wide range of raw materials, and the products made from it can be directly composted or incinerated, which can meet the requirements of sustainable development The good transparency and certain toughness, bio-compatibility and heat-resistance of PLA are the main reasons for its widespread application.
in addition, PLA has thermal-plasticity and it can be applied to many fields, such as packing materials, fillers, etc.. its mainly used for disposable articles such as disposable tableware and packaging materials, as well as electrical appliances and medical care.
Compared with traditional petrochemical products,the energy consumption in the production of polylactic acid is only 20% to 50% of petrochemical products, and the carbon dioxide produced is only 50% of petrochemical products .Therefore,the development of polylactic acid degradable materials is necessary to alleviate global environmental and energy problems.
Features of PLA
1.Biodegradability
Compared with traditional plastics, polylactic acid can be degraded into CO2 and H2O by microorganisms and light. lts bio-degradation products are non-toxic and harmless and will not pollute the environment. The monomer for producing polylactic, which can be fermented by crops such as wheat rice and sugar beet or agricultural type products.Therefore,the raw material for producing polylactic acid is renewable. Polylactic acid as an emerging biodegradable materials are widely used.
2. Bio-compatibility and Absorb-ability
Polylactic acid can be hydrolyzed by acid or enzyme to form lactic acid in the human body. As a metabolite of cells, polylactic acid can be further metabolized by enzymes in the body, to produce CO2 and H2O. Therefore, polylactic acid is non-toxic and harmless to human body moreover it has good bio-compatibility and bio-absorb-ability, Polylactic acid is certified by the US Food and Drug Administration that can be used as a bio-material for implantation in humans.
3. Physically Machinable
As a thermoplastic polymer material, poly lactic acid has good plasticity and physical processing properties, with high melting point, good elasticity and flexibility, and excellent thermal forming ability. Poly lactic acid materials like polymer materials such as polypropylene (PP),polystyrene(PS), and polypropylene ether resin (PPO), can be processing by extrusion, stretching, and injection blow molding.
Post time: Nov-03-2022
