公开(公告)号：US12083718B2

公开(公告)日：2024-09-10

申请号：US17419308

申请日：2019-07-18

申请人： JHM Engineering and Technology (Ningbo) Co., Ltd

发明人： Yanan Song ,  Lejun Wang ,  Weiwei Huang ,  Zongqiang Zheng ,  Yining Liu

IPC分类号： B29C48/07 ,  B29C44/08 ,  B29C44/34 ,  B29C44/50 ,  B29C44/56 ,  B29C48/00 ,  B29C48/14 ,  B29C48/38 ,  B29C48/88 ,  B29C48/92 ,  C08J9/00 ,  C08J9/14 ,  C08K3/34 ,  B29K67/00

CPC分类号： B29C44/08 ,  B29C44/3415 ,  B29C44/50 ,  B29C44/5672 ,  B29C48/0012 ,  B29C48/07 ,  B29C48/144 ,  B29C48/38 ,  B29C48/9135 ,  B29C48/92 ,  C08J9/0066 ,  C08J9/148 ,  C08K3/34 ,  B29K2067/046 ,  C08J2201/03 ,  C08J2367/04

摘要： A preparation method of a high-rate foamed polylactic acid (PLA) sheet includes first-stage extrusion, second-stage extrusion, and foamed sheet extrusion. The method requires the following raw materials in parts by mass: 88 to 94 parts of PLA, 1 to 2 parts of a nucleating agent, 2 to 5 parts of a foaming agent, and 2 to 5 parts of an additive. The new method effectively solves the problems of low foaming rate, low strength, and the like in the industrial production using carbon dioxide, and a prepared PLA sheet with high foaming rate and excellent surface performance can be used in the fields of food packaging, disposable fully-degradable lunch boxes, and the like.