Films containing functional ethylene-based polymer composition

Patent metadata

Field	Value
Publication number	US-10131121-B2
Application number	US-201314405896-A
Country	US
Kind code	B2
Filing date	Mar 5, 2013
Priority date	Jun 5, 2012
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

The invention provides a film comprising at least two layers, a first layer and a second layer; and wherein the first layer is formed from a first composition comprising a polyester, a polylactic acid, or a combination thereof; and wherein the second layer is formed from a second composition comprising at least the following: A) functionalized ethylene-based polymer, and B) ethylene/alpha-olefin interpolymer; and wherein the first layer is adjacent to the second layer.

First claim

The invention claimed is:

1. A film comprising at least two layers, a first layer and a second layer;
and wherein the first layer is formed from a first composition comprising a polyester, a polylactic acid (PLA), or a combination thereof; and
wherein the second layer is formed from a second composition comprising at least the following:
A) an ethylene-based polymer, which is a maleic anhydride grafted-HDPE with a melt index from (I2) 1.0 to 3.0 g/10 min, and
B) an ethylene/alpha-olefin copolymer with a density from 0.870 to 0.885/cc and a melt index (I2) from 1 to 5 g/10 min; and
wherein the first layer is adjacent to the second layer; and
wherein the sum weight of components A and B comprise greater than, or equal to, 98 weight percent of the second composition; and
wherein components A and B are the only polymer components of the second composition; and
wherein second composition comprises from 10 to 75 weight percent of the maleic anhydride grafted-HDPE, based on the weight of the second composition; and
wherein the amount of maleic anhydride graft level (MAH-g-level) is from 0.12 to 0.90 wt %, based on the sum weight of components A and B, and wherein at each MAH-g-level, the composition has a Peel Strength ≥3.2 N/mm.

2. The film of claim 1 , wherein the second composition comprises less than, or equal to, 60 weight percent of the maleic anhydride grafted-HDPE of component A, based on the sum weight of component A and component B.

3. The film of claim 1 , wherein the ethylene/alpha-olefin copolymer of component B (second composition) has a melting point (Tm) less than 85° C., as determined by DSC.

4. An article comprising the film of claim 1 .

5. The film of claim 1 , wherein the thickness ratio of the first layer to the second layer is from 0.70 to 0.99.

6. The film of claim 5 , wherein the first layer and the second layer comprise, together, from 10 to 50 percent, of the total film thickness.

Assignees

• Dow Global Technologies Llc
• Dow Brasil Sa

Inventors

• Oner-Deliormanli Didem
• Oliveira Marlos G
• Batra Ashish
• Patel Rajen M
• Walther Brian W

Classifications

• Y10T428/2878

  including addition polymer from unsaturated monomer · CPC title

• B32B2323/046

  LDPE, i.e. low density polyethylene · CPC title

• C09J123/0807

  Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms · CPC title

• Y10T428/2826

  Synthetic resin or polymer · CPC title

• C08L23/04

  Homopolymers or copolymers of ethene · CPC title