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1. WO1999026771 - METHOD FOR PRODUCTION OF POLYESTER PACKAGES WITH IMPROVED PROPERTIES

Publication Number WO/1999/026771
Publication Date 03.06.1999
International Application No. PCT/US1998/024685
International Filing Date 20.11.1998
Chapter 2 Demand Filed 23.04.1999
IPC
B29C 71/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
71After-treatment of articles without altering their shape; Apparatus therefor
C08J 7/12 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
7Chemical treatment or coating of shaped articles made of macromolecular substances
12Chemical modification
CPC
B29C 71/0009
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
71After-treatment of articles without altering their shape; Apparatus therefor
0009using liquids, e.g. solvents, swelling agents
B29C 71/0063
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
71After-treatment of articles without altering their shape; Apparatus therefor
0063for changing crystallisation
B29L 2031/712
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
2031Other particular articles
712Containers; Packaging elements or accessories, Packages
C08J 2367/02
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
2367Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain
02Polyesters derived from dicarboxylic acids and dihydroxy compounds;
C08J 7/12
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
7Chemical treatment or coating of shaped articles made of macromolecular substances
12Chemical modification
Applicants
  • EASTMAN CHEMICAL COMPANY [US]/[US]
Inventors
  • STEWART, Mark, Edward
  • CORNELL, David, Dunlap
Agents
  • DAVIS, Mark, L.
Priority Data
09/197,29820.11.1998US
60/066,33021.11.1997US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR PRODUCTION OF POLYESTER PACKAGES WITH IMPROVED PROPERTIES
(FR) PROCEDE DE FABRICATION D'EMBALLAGES DE POLYESTER AYANT DES PROPRIETES AMELIOREES
Abstract
(EN) 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.
(FR) L'invention concerne un procédé permettant d'améliorer la cristallinité d'un conteneur thermoplastique (par exemple, en polyester), et plus particulièrement d'une bouteille en polyéthylène téréphtalate (PET), ou en polyéthylène naphtalate (PEN), ou à base d'un mélange des deux. On hydrolyse au moins une partie de la surface interne de la bouteille pour réduire le poids moléculaire, Mn, du polyester par rapport au reste de la bouteille, et on cristallise au moins une partie de ladite surface. Il est souhaitable que cette surface ait une cristalllinité supérieure à environ 30 %. On obtient donc un conteneur thermoplastique à surface interne dont la cristalllinité est supérieure à celle du reste du conteneur, la cristallinité intérieure étant augmentée grâce au procédé décrit.
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