Global Patent Index - EP 1032491 A1

EP 1032491 A1 2000-09-06 - 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

EP 1032491 A1 (EN)

Application

EP 98961743 A

Priority

  • US 9824685 W
  • US 6633097 P
  • US 19729898 A

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 (main, further and additional classification)

B29C 35/04; B29C 35/08; B29D 22/00

IPC 8 full level (invention and additional information)

B29C 71/00 (2006.01); C08J 7/12 (2006.01)

CPC (invention and additional information)

C08J 7/12 (2013.01); B29C 71/0009 (2013.01); B29C 71/0063 (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

EPO simple patent family

WO 9926771 A1 19990603; EP 1032491 A1 20000906

INPADOC legal status


2002-04-03 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20000622

2000-09-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000519

2000-09-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE FR GB