SAUERSTOFFEINSTELLUNG FÜR POLYETHYLENHARZE

A process for extruding a bimodal polyethylene resin wherein polyethylene homopolymer or copolymer having a bimodal molecular weight distribution is conveyed through an extruder and contacted with oxygen. The resin is processed in an extruder having a feed zone 32 in which the resin is not melted, a...

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Hauptverfasser: SHANNON, PORTER, C, LOTTES, JAMES, F, SCHREGENBERGER, SANDRA, D, SHIRODKAR, PRADEEP, P
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creator SHANNON, PORTER, C
LOTTES, JAMES, F
SCHREGENBERGER, SANDRA, D
SHIRODKAR, PRADEEP, P
description A process for extruding a bimodal polyethylene resin wherein polyethylene homopolymer or copolymer having a bimodal molecular weight distribution is conveyed through an extruder and contacted with oxygen. The resin is processed in an extruder having a feed zone 32 in which the resin is not melted, a mixing zone 34 in which at least a portion of the resin is melted, and a melt zone 36 in which the resin is in a molten state. Each extrusion zone is partially filled with resin an is contacted with a gas mixture containing oxygen in 8 to 40 % by volume in the melt zone 36. The resulting oxygen-tailorer resin can be used to make polyethylene films having improved bubble stability. The resin can be further pelletized.
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recordid cdi_epo_espacenet_ATE335584TT1
source esp@cenet
subjects AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
MAKING GRANULES OR PREFORMS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED
RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
WORKING-UP
title SAUERSTOFFEINSTELLUNG FÜR POLYETHYLENHARZE
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