What are the production processes for biodegradable bag raw

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The production processes of biodegradable bag raw materials mainly include the following:

Direct esterification method: Terephthalic acid (PTA), adipic acid (AA), and 1,4-butanediol (BDO) are directly esterified under the action of a catalyst to produce polybutylene terephthalate (PBAT).

Ester exchange method: First, dimethyl terephthalate (DMT) is subjected to ester exchange reaction with 1,4-butanediol to produce 1,4-butanediol terephthalate, and then condensed with adipic acid to produce PBAT.

Blending method: PBAT is blended with other biodegradable materials such as polylactic acid (PLA), starch, etc. to improve its properties.

Grafting method: other functional monomers are grafted onto PBAT molecular chains through grafting reaction to endow them with special properties.

In addition, the production process also includes pre-treatment of raw materials, control of reaction conditions, separation and purification of products, and other steps. The specific production process may vary depending on factors such as the selection of raw materials, product performance requirements, and production scale.

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