Polylacticacid or Polylactide, abbreviated as PLA, a thermoplastic polymer obtained by artificial chemical synthesis of lactic acid produced by biological fermentation, but still maintains good biocompatibility and biodegradability. Unlike other resins that must be derived from petroleum, polylactic acid is derived from renewable natural crops such as corn, wheat, sugar cane, and is a completely green material. Polylactic acid is a polymer obtained by artificial chemical synthesis of lactic acid produced by biological fermentation, but still maintains good biocompatibility and biodegradability. It has similar impermeability to polyester and has similar gloss definition and processability to polystyrene. It provides a lower temperature heat sealability than polyolefins and can be processed using melt processing techniques, including spinning techniques. Polylactic acid has good mechanical properties and physical properties, and is suitable for various processing methods such as blow molding and thermoplastic molding. It is easy to process and widely used. Polylactic acid has good compatibility and degradability. Decomposition of polylactic acid:
The decomposition of polylactic acid has two stages: decomposition by hydrolysis reaction and decomposition by microorganisms. Hydrolysis occurs first in the natural environment, and then the microorganisms enter the tissue and break it down into carbon dioxide and water. Under composting conditions (high temperature and high humidity), the hydrolysis reaction can be easily accomplished and the decomposition rate is faster. In an environment where hydrolysis is not easily produced, the decomposition process is gradual. It can be used again as a carbon atom required for photosynthesis in plants.
Characteristics of polylactic acid: In addition to the basic characteristics of biodegradable plastics, polylactic acid has its own unique characteristics. Traditional biodegradable plastics are not as strong as ordinary plastics in terms of strength, transparency, and resistance to climate change. Polylactic acid and petrochemical synthetic plastics have similar basic properties, and can be widely used in the manufacture of various applications. Polylactic acid also has good gloss and transparency, comparable to films made from polystyrene, and is not available in other biodegradable products.
Polylactic acid has the best tensile strength and ductility. Polylactic acid can also be produced in various common processing methods, such as melt extrusion, injection molding, blown film forming, foam molding and vacuum forming, and the polymerization currently widely used. The article has similar forming conditions and it also has the same printing properties as conventional films.