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A polyethylene blend composition and film made therefrom

A technology of composition and blend, which is applied in the field of polyethylene blend composition and the film prepared therefrom, can solve the problems such as the reduction of toughness characteristics

Inactive Publication Date: 2017-04-19
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of LDPE often results in a reduction in especially toughness properties such as dart drop and puncture

Method used

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  • A polyethylene blend composition and film made therefrom
  • A polyethylene blend composition and film made therefrom
  • A polyethylene blend composition and film made therefrom

Examples

Experimental program
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Effect test

example

[0052] The following examples illustrate the invention, but are not intended to limit the scope of the invention.

[0053] resin production

[0054] All (co)monomer feeds (ethylene, 1-octene) and process solvents (narrow boiling range high purity isoparaffinic solvents available from ExxonMobil Corporation under the trademark Isopar E) were introduced into the reaction environment Purified with molecular sieves. High purity hydrogen is supplied via a gas tank and is ready to be dosed and delivered to the reactor and it is not purified further. The reactor monomer feed (ethylene) stream was pressurized via a mechanical compressor to a reaction pressure above 725 psig. The solvent feed was mechanically pressurized to a reaction pressure above 725 psig. The comonomer (1-octene) feed was also mechanically pressurized and injected directly into the feed stream for the second reactor. Three catalyst components were injected into the first reactor (CAT-A, RIBS-2 and MMAO-3A). Al...

example 1

[0077] The inventive ethylene-based polymer composition (ie, Inventive Example 1) was prepared according to the above procedure. The process conditions used to report the modified resin used in Inventive Example 1 are reported in Tables 1-4.

[0078] Comparative Example 1 is an ethylene / 1-octene polyethylene produced as described under the conditions reported in Tables 1 to 4, wherein I 2 is about 0.5g / 10min and the density is 0.935g / cm 3 .

[0079] The characterization properties of Inventive Example 1 and Comparative Example 1 are reported in Tables 5-15.

[0080] The melt index, melt index ratio and density are reported in Table 5. Inventive Example 1 has a lower melt index (I 2 ) and a high I 10 / I 2 . For higher shrinkage characteristics such as higher I 10 / I 2 For this reason, a lower melt index is advantageous. The densities of all samples were relatively high, as expected for high modulus shrink films.

[0081] DSC data are reported in Table 6. The melting...

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Abstract

A polyethylene blend composition suitable for film applications comprising from 10 to 100 percent by weight of an ethylene-based polymer made by the process of: selecting an ethylene / alpha-olefin interpolymer (LLDPE) having a Comonomer Distribution Constant (CDC) in the range of from 75 to 300, a vinyl unsaturation of less than 150 vinyls per one million carbon atoms of the ethylene / alpha-olefin interpolymer; a zero shear viscosity ratio (ZSVR) in the range from 4 to 50; a density in the range of from 0.925 to 0.950 g / cm3, a melt index (I2) in a range of from 0.1 to 2.5 g / 10 minutes, a molecular weight distribution (Mw / Mn) in the range of from 1.8 to 4.0; reacting said ethylene / alpha-olefin interpolymer with an alkoxy amine derivative in an amount equal to or less than 900 parts derivative per million parts by weight of total ethylene / alpha-olefin interpolymer under conditions sufficient to increase the melt strength of the ethylene / alpha-olefin interpolymer is provided.

Description

technical field [0001] The present invention relates to polyethylene blend compositions and films made therefrom. Background technique [0002] For finished shrink films and biaxially oriented polyethylene (BOPE) shrink films, a variety of film properties are required for adequate packaging performance, including high shrink force / tension, good optical properties (low haze and high gloss), low elongation Long rate and good dart / piercing performance. For most of these properties, current structures typically utilize >50% to 60% low density polyethylene (LDPE) in either single layer or 3 layer structures. The addition of LDPE generally results in a reduction in especially toughness properties such as dart and puncture. Accordingly, there remains a need for polyethylene compositions that provide these various properties. SUMMARY OF THE INVENTION [0003] The present invention provides polyethylene blend compositions and films made therefrom. [0004] In one embodiment,...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06B29C48/08
CPCC08J5/18C08L23/0815C08L2201/10C08L2203/16C08J2423/06C08J2323/08C08L2207/066C08L2312/00C08L23/06C08L2205/025C08J2323/06C08K5/3435B29C48/08B29C48/022B29B7/20B29B9/065B29K2023/0625B29L2007/008C08L2203/162
Inventor T·P·卡里亚拉J·C·戈梅斯
Owner DOW GLOBAL TECH LLC