摘要 |
The present invention pertains to a continuous process and polymerization system characterized by separate injection of catalyst and make-up feed, an ethylene interpolymer composition characterized as having broad molecular weight distribution (MWD) and optimized compositional uniformity, a process for making such a composition and a fabricated article made from such composition. The novel composition is characterized as having a melt flow ratio, I10/I2, from 8 to 10.4, a Mw/Mn of greater than 4 as determined by gel permeation chromatography, a melt index, I2, from 0.1 to 10 gram/10 minutes, a density less than 0.945 gram/cubic centimeter, and based on the total weight of crystallizable polymer portions, a weight percent at the dominant peak temperature above 75 ~C, as determined using crystallization analysis fractionation in the range of 20 to 100 ~C, equal to or greater than the mathematical product of 1.7946x10-28 x 10(31.839 x composition density) for composition density in grams/cubic centimeter. The novel composition exhibits good processibility and improved toughness properties, especially excellent film tear and impact resistance, and is particularly well-suited for use in applications such as high performance trash can liners and heavy duty shipping bags.
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申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
ANDERSON, KENNETH W.;CHUM, PAK-WING STEVE;JAIN, PRADEEP;EVERSDYK, DAVID A.;TAU, LI-MIN;SEHANOBISH, KALYAN;HAZLITT, LONNIE G. |