Poly Lactic Acid (PLA)Plastic
Introduction: Polylactic acid has good thermal stability, a processing temperature of 170-230°C, good solvent resistance, and can be processed in a variety of ways, such as extrusion, spinning, biaxial stretching, and injection blow molding. In addition to being biodegradable, products made from polylactic acid have good biocompatibility, gloss, transparency, hand feel, and heat resistance.
Advantages:
1. Polylactic acid (PLA) is a new type of biodegradable material made from starch raw materials from renewable plant resources (such as corn). Starch raw materials are saccharified to obtain glucose, which is then fermented with glucose and certain strains of bacteria to produce high-purity lactic acid, and then polylactic acid of a certain molecular weight is synthesized by chemical synthesis. It has good biodegradability and can be completely degraded by microorganisms in nature after use, ultimately generating carbon dioxide and water, which does not pollute the environment. This is very beneficial to environmental protection and is a recognized environmentally friendly material.
2. Good mechanical and physical properties. Polylactic acid is suitable for various processing methods such as blow molding and thermoplastics. It is easy to process and has a wide range of applications. It can be used to process various plastic products from industrial to civilian use, packaged food, fast food lunch boxes, non-woven fabrics, industrial and civilian fabrics. It can then be processed into agricultural fabrics, health fabrics, rags, sanitary products, outdoor UV-proof fabrics, tent fabrics, floor mats, etc., and the market prospects are very promising.
3. Good compatibility and degradability. Polylactic acid is also widely used in the medical field, such as the production of disposable infusion equipment, non-disassembly surgical sutures, etc., and low-molecular polylactic acid as a drug sustained-release packaging agent.
4. In addition to the basic properties of biodegradable plastics, polylactic acid (PLA) also has its own unique properties. The strength, transparency and resistance to climate change of traditional biodegradable plastics are not as good as ordinary plastics.
5. The basic physical properties of polylactic acid (PLA) are similar to those of petrochemical synthetic plastics, that is, it can be widely used to manufacture various application products. Polylactic acid also has good gloss and transparency, which is equivalent to the film made of polystyrene, which is not available from other biodegradable products.
6. Polylactic acid (PLA) has the best tensile strength and ductility. Polylactic acid can also be produced by various common processing methods, such as melt extrusion molding, injection molding, blown film molding, foam molding and vacuum molding. It has similar molding conditions as widely used polymers. 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.
7. Polylactic acid (PLA) film has good air permeability, oxygen permeability and carbon dioxide permeability, and it also has the characteristics of isolating odors. Viruses and molds are easy to attach 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.
8. When polylactic acid (PLA) is incinerated, its combustion calorific value is the same as that of incinerating paper, which is half of that of incinerating traditional plastics (such as polyethylene), and incinerating polylactic acid will never release toxic gases such as nitrides and sulfides. The human body also contains lactic acid in monomeric form, which indicates the safety of this decomposition product.
