Multilayer films and laminates containing slip agents

Patent metadata

Field	Value
Publication number	US-11090852-B2
Application number	US-201716620008-A
Country	US
Kind code	B2
Filing date	Jun 9, 2017
Priority date	Jun 9, 2017
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

The coextruded multilayer film has at least two layers, including a sealant layer and a second layer in contact with the sealant layer. The sealant layer contains (A) a first ethylene-based polymer having a density from 0.865 g/cc to 0.930 g/cc and a melt index from 0.5 g/10 min to 25 g/10 min; (B) an unsaturated primary fatty acid amide having a melting point of 100° C. or less; and (C) a saturated primary fatty acid amide having a melting point greater than 100° C. The unsaturated primary fatty acid amide and the saturated primary fatty acid amide have a weight ratio of from 3:1 to 1:6. The second layer contains a second ethylene-based polymer. The present disclosure also provides a laminate containing said sealant layer.

First claim

We claim:

1. A coextruded multilayer film comprising at least two layers comprising:
a sealant layer comprising
(A) a first ethylene-based polymer having a density from 0.865 g/cc to 0.930 g/cc and a melt index from 0.5 g/10 min to 25 g/10 min;
(B) an unsaturated primary fatty acid amide having a melting point of 100° C. or less;
(C) a saturated primary fatty acid amide having a melting point greater than 100° C., the unsaturated primary fatty acid amide and the saturated primary fatty acid amide having a weight ratio of from 3:1 to 1:6; and

a second layer in contact with the sealant layer, the second layer comprising a second ethylene-based polymer.

2. The coextruded multilayer film of claim 1 , wherein the unsaturated primary fatty acid amide is selected from the group consisting of erucamide, oleamide, and combinations thereof.

3. The coextruded multilayer film of claim 1 , wherein the saturated primary fatty acid amide is selected from the group consisting of behenamide, palmitamide, stearamide, and combinations thereof.

4. The coextruded multilayer film of claim 1 , wherein the first ethylene-based polymer is selected from the group consisting of an ethylene homopolymer, an ethylene/α-olefin copolymer, and combinations thereof.

5. The coextruded multilayer film of claim 1 , wherein the sealant layer further comprises a diprotic fatty acid having a melting point greater than 100° C. and a decomposition temperature greater than 200° C.

6. The coextruded multilayer film of claim 1 , wherein the sealant layer comprises from 0.01 wt % to 5 wt % of a combined amount of the unsaturated primary fatty acid amide and the saturated primary fatty acid amide, based on the total weight of the sealant layer.

7. A laminate comprising the coextruded multilayer film of claim 1 .

8. A laminate comprising:
a first film comprising a sealant layer comprising:
(A) a first ethylene-based polymer having a density from 0.865 g/cc to 0.930 g/cc and a melt index from 0.5 g/10 min to 25 g/10 min;
(B) an unsaturated primary fatty acid amide having a melting point of 100° C. or less;
(C) a saturated primary fatty acid amide having a melting point greater than 100° C., the unsaturated primary fatty acid amide and the saturated primary fatty acid amide having a weight ratio of from 3:1 to 1:6; and

a second film, wherein the first film is laminated to the second film.

9. The laminate of claim 8 , wherein the unsaturated primary fatty acid amide is selected from the group consisting of erucamide, oleamide, and combinations thereof.

10. The laminate of claim 8 , wherein the saturated primary fatty acid amide is selected from the group consisting of behenamide, palmitamide, stearamide, and combinations thereof.

11. The laminate of claim 8 , wherein the first ethylene-based polymer is selected from the group consisting of an ethylene homopolymer, an ethylene/α-olefin copolymer, and combinations thereof.

12. The laminate of claim 8 , wherein the sealant layer further comprises a diprotic fatty acid having a melting point greater than 100° C. and a decomposition temperature greater than 200° C.

13. The laminate of claim 8 , wherein the sealant layer has a Laminate 55° C. Cure coefficient of friction (COF) from 0.01 to less than 0.4.

14. The laminate of claim 8 , wherein the second film comprises a substrate layer comprising a component selected from the group consisting of a second ethylene-based polymer, a propylene-based polymer, polyamide, polyester, ethylene vinyl alcohol copolymer, polyethylene terephthalate, ethylene vinyl acrylate copolymer, ethylene methyl acrylate copolymer, ethylene ethyl acrylate copolymer, ethylene butyl acrylate copolymer, ethylene acrylic acid copolymer, ethylene methacrylic acid copolymer, an ionomer of ethylene acrylic acid, an ionomer of methacylic acid, maleic anhydride grafted ethylene-based polymer, a metal foil, and combinations thereof.

15. The laminate of claim 8 , further comprising a third film, wherein the third film is laminated to the second film.

Assignees

• Dow Global Technologies Llc

Inventors

• Su Fengyi
• Liu Andong
• Chen Hongyu
• Pan Jianping
• Yun Xiao Bing
• Allgeuer Thomas
• Chen Erqiang
• Zhao Tipeng
• Liao Guihong

Classifications

• B32B2439/80

  Medical packaging · CPC title

• B32B2307/746

  Slipping, anti-blocking, low friction · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B27/327

  comprising polyolefins obtained by a metallocene or single-site catalyst · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title