Polylactic acid (PLA) is a new type of biodegradable material, made from starch raw materials proposed by renewable plant resources (such as corn). Starch raw materials are saccharified to obtain glucose, which is then fermented by glucose and certain strains to produce high-purity lactic acid, and then a certain molecular weight polylactic acid is synthesized by chemical synthesis. It has good biodegradability and can be completely degraded by microorganisms in nature after use, and eventually carbon dioxide and water are generated without polluting the environment. This is very beneficial to environmental protection and is recognized as an environmentally friendly material. Ordinary plastics are still treated by incineration and cremation, causing a large amount of greenhouse gases to be discharged into the air, while polylactic acid plastics are buried in the soil to degrade, and the carbon dioxide produced directly enters the soil organic matter or is absorbed by plants, and will not be discharged into the air. Will not cause the greenhouse effect.

Good mechanical and physical properties. Polylactic acid is suitable for various processing methods such as blow molding and thermoplastic, and is easy to process and has a wide range of applications. It can be used to process various plastic products, packaged foods, fast food lunch boxes, non-woven fabrics, industrial and civilian fabrics from industry to civilian use. And then processed into agricultural fabrics, health care fabrics, wipes, sanitary products, outdoor anti-ultraviolet fabrics, tent fabrics, floor mats, etc. The market prospect is very promising.

Good compatibility and degradability. Polylactic acid is also widely used in the field of medicine, such as the production of disposable infusion equipment, non-dismantling surgical sutures, etc., and low-molecular-weight polylactic acid as a drug sustained-release packaging agent.

In addition to the basic characteristics of biodegradable plastics, polylactic acid (PLA) also has its own unique characteristics. The strength, transparency and resistance to climate change of traditional biodegradable plastics are not as good as ordinary plastics.

The basic physical properties of polylactic acid (PLA) and petrochemical synthetic plastics are similar, that is to say, it can be widely used to manufacture various application products. Polylactic acid also has good gloss and transparency, which is comparable to films made of polystyrene, and cannot be provided by other biodegradable products.

Polylactic acid (PLA) has the best tensile strength and ductility. Polylactic acid can also be produced in various common processing methods, such as: melt extrusion molding, injection molding, blown film molding, foam molding and vacuum molding, and a wide range of The polymer used has similar forming conditions, in addition it also has the same printing performance as traditional films. In this way, polylactic acid can be made into a variety of application products to meet the needs of different industries.

Polylactic acid (PLA) film has good air permeability, oxygen permeability, and dioxydicarbon permeability. It also has the characteristics of odor isolation. Viruses and molds are easy to adhere to the surface of biodegradable plastics, so there are concerns about safety and hygiene. However, polylactic acid is the only biodegradable plastic with excellent antibacterial and antifungal properties.

When polylactic acid (PLA) is incinerated, its combustion calorific value is the same as that of incineration paper, which is half of that of traditional plastics (such as polyethylene), and incineration polylactic acid will never release toxic gases such as nitrides and sulfides. The human body also contains lactic acid in the form of monomer, which shows the safety of this decomposable product.