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Patent Searching and Data


Title:
COPOLYMERIC POLYESTER CHIP AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JPH07108528
Kind Code:
A
Abstract:

PURPOSE: To manufacture raw material chips not fusing to machine walls by setting a multiple fusing peak temperature measured by DSC in a specific range, and allowing the heat absorption amount to be a specific value or more in isophthalic acid copolymcrlc polyester chips.

CONSTITUTION: Isophthalic acid copolymeric polyestar chips are determined to be in the range of 100-160°C in its Tm' measured by DSC and 0.1cal/g or more in its heat absorption amount. Herein, Tm' is a multiple fusing peak temperature generated at the side of lower temperature than Tm. In its crystallization, the dry machine wall temperature during chip supply in an atmosphere of gas is a glass-transition temperature of the chips prior to crystallization or lower and raised to the temperature in 10-40min in temperature a formula described below. Herein. the formula is made 3.4M+66.5<T<3.4M+96.5, and M denotes an isophthalic acid copolymeric rate (mol%). In this manner, raw material chips for metal plating film can be obtained which have no fusion to machine walls, and also have no risk of causing coloring and deterioration.


Inventors:
TATEBAYASHI TAKEO
SHIMIZU YUZO
HIRAYAMA TAKASHI
Application Number:
JP25306793A
Publication Date:
April 25, 1995
Filing Date:
October 08, 1993
Export Citation:
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Assignee:
TORAY INDUSTRIES
International Classes:
C08J3/12; B29B9/00; B29B13/02; C08G63/88; C08J3/00; C09J167/00; C09J167/02; B29K67/00; (IPC1-7): B29B9/00; B29B13/02; C08G63/88; C08J3/12; C09J167/02