Granulation processing method for degradable material and formed body prepared thereby

Abstract

The present invention relates to the technical field of processing of degradable materials, and in particular relates to a granulation processing method for a degradable material and a formed body prepared thereby. The method comprises: after a polyhydroxyalkanoate powder is melted, pre-crystallizing same at a temperature of 20-60° C. below the Tm of polyhydroxyalkanoate, and then extruding, crystallizing and granulating same. In the granulation processing method of the present invention, pre-crystallization is performed at a temperature of 20-60° C. below the Tm of polyhydroxyalkanoate, followed by extrusion, such that the crystallization speed can be accelerated online, non-sticky particles can be quickly obtained and the crystallization time is greatly shortened under the condition that no auxiliary agent is added, thereby facilitating transportation and subsequent processing. In addition, the method of the present invention does not need to change the current extrusion granulation equipment, so that the equipment cost is not additionally increased; and due to a lower processing temperature, the electrical heating power and the heat exchange power are reduced, thereby rendering the energy consumption lower and facilitating popularization and application in actual production.

Dependencies are inferred from the claim text.