EP 1032491 A1 20000906 - METHOD FOR PRODUCTION OF POLYESTER PACKAGES WITH IMPROVED PROPERTIES
Title (en)
METHOD FOR PRODUCTION OF POLYESTER PACKAGES WITH IMPROVED PROPERTIES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON POLYESTERVERPACKUNGEN MIT VERBESSERTEN EIGENSCHAFTEN
Title (fr)
PROCEDE DE FABRICATION D'EMBALLAGES DE POLYESTER AYANT DES PROPRIETES AMELIOREES
Publication
Application
Priority
- US 9824685 W 19981120
- US 6633097 P 19971121
- US 19729898 A 19981120
Abstract (en)
[origin: WO9926771A1] A method for increasing the crystallinity of a thermoplastic container, such as a polyester, and more particularly a PET, PEN, or blend thereof bottle. The method includes the steps of hydrolyzing at least a portion of the inside surface of the bottle to reduce the molecular weight, Mn, of the polyester relative to the remainder of the bottle and crystallizing at least a portion of the inside surface. It is desirable for the inside surface to have a crystallinity greater than about 30 %. The invention further provides a thermoplastic container having an inside surface with a crystallinity greater than the remainder of the container wherein the inside crystallinity is increased utilizing the method of the invention.
IPC 1-7
IPC 8 full level
B29C 71/00 (2006.01); C08J 7/12 (2006.01)
CPC (source: EP)
B29C 71/0009 (2013.01); B29C 71/0063 (2013.01); C08J 7/12 (2013.01); B29L 2031/712 (2013.01); C08J 2367/02 (2013.01)
Citation (search report)
See references of WO 9926771A1
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
US 9824685 W 19981120; EP 98961743 A 19981120