公开(公告)号：US20140091490A1

公开(公告)日：2014-04-03

申请号：US13644252

申请日：2012-10-03

Applicant: INTERNATIONAL PAPER COMPANY

Inventor： Richard A. Tedford ,  Ganesan Kumar ,  Thomas Christie

IPC: C08J5/00

CPC classification number: C08J5/00 ,  B29C48/07 ,  B29C51/002 ,  B29C51/02 ,  B29K2067/046 ,  B29K2995/004 ,  C08J2367/04

Abstract: A process for thermoforming a discrete section of an amorphous pliable thermoplastic sheet in a temperature-controlled thermoforming mold to provide a discrete thermoformed section having one or more discrete shaped articles formed therein and to heat the shaped articles to a temperature below the Tm but above the Tg of the polylactic acid polymer in the sheet to induce crystallization of the polylactic acid polymer in the shaped articles. While unconstrained by the thermoforming mold, the discrete thermoformed section is tempered at a temperature such that the polylactic acid polymer in the shaped articles achieves a degree of crystallization of at least about 5% (as measured by X-ray diffraction) to thereby increase heat resistance of the shaped articles.

Abstract translation: 一种用于在温度控制的热成型模具中热成型非晶态柔性热塑性片材的分立部分的方法，以提供在其中形成的具有一个或多个离散成形制品的分立的热成型部分，并将成形制品加热至低于Tm但高于 聚酰胺聚合物在片材中的Tg，以引起成型制品中聚乳酸聚合物的结晶。 在不受热成形模具约束的情况下，分立的热成型部分在温度下回火，使得成型制品中的聚乳酸聚合物达到至少约5％的结晶度（通过X射线衍射测量），从而增加热量 成型制品的阻力。