The degradable packaging bag means degradable, but the degradable packaging bag is divided into two types: degradable and fully degradable. Degradable packaging bags refer to adding a certain amount of additives (such as starch, modified starch or other cellulose, photosensitizers, biodegraders, etc.) degenerate. Completely degradable packaging bags refer to plastic packaging bags that are completely degraded into water and carbon dioxide. The main source of this fully degradable material is the processing of corn and cassava into lactic acid, or PLA.
Polylactic acid (PLA) is a novel biological matrix and renewable biodegradable material. Using starch as raw material, saccharification to obtain glucose, and then fermenting glucose and certain strains to obtain high-purity lactic acid, and then synthesizing polylactic acid with a certain molecular weight through chemical synthesis. It has good biodegradability. After use, it can be completely degraded by microorganisms in nature under specific conditions to generate carbon dioxide and water, which does not pollute the environment. It is very beneficial to protect the environment and is an environmentally friendly material for workers.
At present, the main bio-based material of the fully degradable packaging bag is composed of PLA+PBAT, which can be completely decomposed into water and carbon dioxide in 3-6 months under composting conditions (60-70 degrees), without polluting the environment. Why add PBAT, a professional manufacturer of flexible packaging, the following explanation is that PBAT adipic acid, 1,4-butanediol, terephthalic acid copolymer, too much is a fully biodegradable synthetic aliphatic and aromatic polymer Taiwan, PBAT has excellent flexibility, can undertake film extrusion, blowing processing, coating and other processing. The purpose of blending PLA and PBAT is to improve the toughness, biodegradability and formability of PLA. PLA and PBAT are incompatible with each other, so choosing a suitable compatibilizer can significantly improve the performance of PLA.
Post time: Jun-30-2022