Linear low density polyethylene composition suitable for cast film

Patent metadata

Field	Value
Publication number	US-9828476-B2
Application number	US-201214411565-A
Country	US
Kind code	B2
Filing date	Jul 20, 2012
Priority date	Jul 20, 2012
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

The instant invention provides a linear low density polyethylene composition suitable for cast film, films made therefrom, and packaging devices comprising one or more such film layers. The linear low density polyethylene composition suitable for cast film according to the present invention comprises an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 40 to 200, for example from 40 to 150, a vinyl unsaturation of less than 0.12 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1.2 to 5, for example from 1.5 to 4; a density in the range of from 0.910 to 0.935, for example from 0.915 to 0.925, g/cm 3 , a melt index (I 2 ) in a range of from 1 to 10, for example from 2 to 6 g/10 minutes, a molecular weight distribution (M w /M n ) in the range of from 2 to 3.5.

First claim

We claim:

1. A cast film comprising:
a linear low density polyethylene composition comprising an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant with comonomer distribution constant (CDC) in a range of from 40 to 200, a vinyl unsaturation of less than 0.15 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition, a zero shear viscosity ratio (ZSVR) in a range from 1.5 to 4, a density in a range of from 0.915 to 0.925 g/cm 3 , a melt index (I 2 ) in a range of from 2 to 6 g/ 10 minutes, and a molecular weight distribution (Mw/Mn) in a range of from 2 to 3.5.

2. The cast film of claim 1 , wherein said cast film is stretched at least in one direction.

3. A packaging device comprising the cast film of claim 1 .

4. The packaging device of claim 3 , wherein said packaging device is a food packaging device or non-food packaging device.

5. A hygiene product comprising the cast film of claim 1 .

6. The cast film of claim 1 , wherein said cast film is formed into tapes for use in artificial turf or woven textiles.

Assignees

• Bensason Selmin
• Demirors Mehmet
• Yun Xiao Bing
• Dow Global Technologies Llc

Inventors

• Bensason Selmin
• Demirors Mehmet
• Yun Xiao Bing

Classifications

• C08F4/659

  Component covered by group C08F4/64 containing a transition metal-carbon bond {(C08F4/64003 - C08F4/64196 take precedence)} · CPC title

• B32B2555/00

  Personal care · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• C08F4/64193

  OOOO · CPC title

• C08F210/16

  Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title