Method for preparing polylactic acid foam material

Abstract

The invention relates to a preparation method for an expanded material of polylactic acid; the polylactic acid, a tackifying modifier, a chemical inhibitor, a vesicant, a foaming accessory ingredient, a abscess stabilizer and a parting agent are mixed under high temperature according to a certain proportion to obtain a basic mixture; then the basic mixture is arranged in a die to carry out moulding foaming on a vulcanizing machine with a certain temperature and a certain pressure to manufacture the foaming material of polylactic acid. The foaming material of polylactic acid manufactured by the method of the invention has excellent performances of being biodegradable, controllable density, easy processing as well as good barrier property, has similar foaming shaping performance and shock-absorbing capacity with polystyrene, can replace the foaming material of polystyrene, can be used as the materials for heat isolating, sound isolating and shock absorption and has broad application in the fields of cushion packaging, transportation, electric apparatus, refrigeration, agriculture and forestry and gardening.

Description

technical field

[0001] The invention relates to a preparation method of polylactic acid (PLA) foaming material, which adopts molded chemical foaming method to prepare PLA rigid foam with biodegradability, controllable density, high strength and excellent comprehensive performance through the control of formula and process conditions. bubble material. The invention belongs to the technical field of polymer processing. Background technique

[0002] Polylactic acid is an aliphatic polyester polymer material with excellent biocompatibility and complete biodegradation. It can be completely decomposed under the action of microorganisms, water, acid, alkali, etc. in nature, and the final product is carbon dioxide. And water, no pollution to the environment, can be used as an environmentally friendly material to replace traditional polymer materials. Polylactic acid is not only biodegradable, but also its raw materials are derived from environmentally renewable resources, which ca...