Abstract: The present application relates to the technical field of processing of degradable materials, and in particular to a granulation processing method for a low-melt-index degradable material, and a shaped body prepared thereby. The granulation processing method for the degradable material provided by the present invention comprises: reducing the temperature of a screw rod for multiple times and increasing the rotating speed of the screw rod during an extrusion crystallization granulation process. The granulation processing method provided by the present invention is beneficial to improving the crystallization rate of the material during the granulation processing process, and reduces the influence caused by shear heat and relatively high processing temperature, thereby obtaining a granular material having a lower melt index.

Abstract: The present invention relates to the field of biodegradable materials, and specifically provides a polyhydroxyalkanoate composition comprising a crystallization accelerator, and a molded body. The polyhydroxyalkanoate composition comprises polyhydroxyalkanoate and a crystallization accelerator, wherein the crystallization accelerator is one or more of fatty acid amide compounds. By selecting fatty acid amide as the crystallization accelerator of polyhydroxyalkanoate, the composition provided by the present invention provides a certain time guarantee for the crystallization of the molded body, promotes the crystallization and molding of polyhydroxyalkanoate, and at the same time, solves the problem that the polyhydroxyalkanoate resin is adhered to processing equipment parts in the process of processing the polyhydroxyalkanoate molded body in the prior art, and improves the processing efficiency of preparing the molded body.

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.