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1. EP2729526 - POLYETHYLENE BLEND COMPOSITION SUITABLE FOR BLOWN FILM, METHOD OF PRODUCING THE SAME, AND FILMS MADE THEREFROM

Office
European Patent Office
Application Number 12735740
Application Date 02.07.2012
Publication Number 2729526
Publication Date 14.05.2014
Publication Kind B1
IPC
C08L 23/08
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
23Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
02not modified by chemical after-treatment
04Homopolymers or copolymers of ethene
08Copolymers of ethene
C08J 5/18
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
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
CPC
C08J 5/18
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
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
C08J 2323/08
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
2323Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
02not modified by chemical after treatment
04Homopolymers or copolymers of ethene
08Copolymers of ethene
C08J 2423/06
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
2423Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
02not modified by chemical after treatment
04Homopolymers or copolymers of ethene
06Polyethene
C08L 23/0815
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
23Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
02not modified by chemical after-treatment
04Homopolymers or copolymers of ethene
08Copolymers of ethene
0807Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
0815Copolymers of ethene with aliphatic 1-olefins
C08L 2203/16
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
2203Applications
16used for films
C08L 2207/066
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
2207Properties characterising the ingredient of the composition
06Properties of polyethylene
066LDPE (radical process)
Applicants DOW GLOBAL TECHNOLOGIES LLC
Inventors EFFLER LAWRENCE J
SAVARGAONKAR NILESH R
DEMIRORS MEHMET
BENSASON SELIM
KARJALA TERESA P
BUNKER GREGORY
SERRAT CRISTINA
WANG JIAN
Designated States
Priority Data 201161505869 08.07.2011 US
Title
(DE) POLYETHYLENZUSAMMENSETZUNG FÜR EIN BLASFOLIEN VERFAHREN UND DARAUS HERGESTELLTE FILME
(EN) POLYETHYLENE BLEND COMPOSITION SUITABLE FOR BLOWN FILM, METHOD OF PRODUCING THE SAME, AND FILMS MADE THEREFROM
(FR) UNE COMPOSITION DE POLYÉTHYLÈNE ADAPTÉE POUR UN PROCÉDÉ DE FILM SOUFFLÉ ET FILMS OBTENUS À PARTIR DE CEUX-CI
Abstract
(EN)
The instant invention provides a polyethylene blend composition suitable for blown film, method of producing the same, and films made therefrom. The polyethylene blend composition suitable for blown film according to the present invention comprises the melt blending product of: (a) less than or equal to 4 percent by weight of a low density polyethylene (LDPE) having a density in the range of from 0.915 to 0.935 g/cm3, and a melt index (I2) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (Mw/Mn) in the range of from 6 to 10; (b) 90 percent or greater by weight of a heterogeneous linear low density polyethylene (hLLDPE) having a density in the range of from 0.917 to 0.950 g/cm3, and a melt index (I2) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; and (e) optionally one or more antioxidants. When the polyethylene blend-composition is formed into a film via blown film process, the output rate is improved at least 6 percent relative to a similar linear low density polyethylene.

(FR)
Cette invention concerne une composition de type mélange de polyéthylènes convenant au soufflage de films, son procédé de production, et les films obtenus à partir de celle-ci. La composition de type mélange de polyéthylènes convenant au soufflage de films selon la présente invention comprend le produit de type mélange fondu constitué de : (a) une quantité inférieure ou égale à 4 % en poids de polyéthylène basse densité (LDPE) ayant une densité dans la plage de 0,915 à 0,935 g/cm3, un indice à l'état fondu (I2) compris entre une valeur supérieure à 0,8 et une valeur inférieure ou égale à 5 g/10 minutes, et une distribution des poids moléculaires (Mw/Mn) dans la plage de 6 à 10 ; (b) 90 % en poids ou plus d'un polyéthylène basse densité linéaire de type hétérogène (hLLDPE) ayant une densité dans la plage de 0,917 à 0,950 g/cm3, et un indice à l'état fondu (I2) compris entre 0,1 et une valeur inférieure ou égale à 5 g/10 minutes ; (c) éventuellement un agent de neutralisation à base d'hydrotalcite ; (d) éventuellement un ou plusieurs agents de nucléation ; et (e) éventuellement un ou plusieurs antioxydants. Quand la composition de type mélange de polyéthylènes selon l'invention est transformée en film par un procédé de soufflage de film, la vitesse de sortie est améliorée d'au moins 6 % par rapport à un polyéthylène basse densité linéaire similaire.