The main process of "non-food biomass-lactic acid-lactide-polylactic acid (PLA)-biomatic-based material products-polylactic acid recycling and reuse (rPLA)" is adopted. Among them, biological fermentation of high-purity lactic acid, polymerization of high-purity lactide, synthesis of high-molecular-weight polylactic acid, and chemical recovery of polylactic acid are the core process technologies. It is necessary to screen unique strains, optimize the raw material purification process during the synthesis process, and continuously modify the formula. Improve to achieve continuous synthesis of high-quality polylactic acid.
The molecular weight distribution of the synthesized polylactic acid is uniform, with a molecular weight of> 100,000; the modified polylactic acid material has a temperature resistance of 100 ° C, a tensile strength of>80Mpa, an elongation at break of>10%, and a transparency of>95%; the material loss in production is <5%, and the defective rate is <3%.
The biobased properties of polylactic acid cut off fossil dependence from the source. The carbon emissions in its production process are only 25%-68% of that of traditional plastics; the gross profit margin of polylactic acid coated paper cups reaches 30%-40%, which is higher than that of traditional polyethylene (PE) coated products. 15-25% higher, and the gross profit margin of medical-grade polylactic acid materials exceeds 50%.