Polylactic acid (PLA) production process
Time:2020-11-23
1. Take materials
After crushing corn and other shell crops, starch is extracted from it, and then the starch is made into unrefined glucose. Many high technologies have overcome the process of crushing, and directly extract raw materials from a large number of crops.
2. Fermentation
Glucose is fermented in a manner similar to the production of beer or alcohol, and the glucose is fermented into lactic acid similar to food added to human muscle tissue.
3. Intermediate products
The lactic acid monomer is transformed into an intermediate product-water-reduced lactic acid, or lactide, through a special concentration process.
4. Aggregation
After the lactide monomer is vacuum-purified, a solvent-free dissolving process is used to complete the ring-opening action to polymerize the monomer.
5. Polymer modification
Because the molecular weight and crystallinity of the polymer are different, the material characteristics can vary greatly. Therefore, the PLA is modified differently for different applications.
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