Multilayer films and laminates containing slip agents

Patent metadata

Field	Value
Publication number	US-11338563-B2
Application number	US-201716620170-A
Country	US
Kind code	B2
Filing date	Jun 9, 2017
Priority date	Jun 9, 2017
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

Provided is a coextruded multilayer film. 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 diprotic fatty acid having a melting point greater than 100° C. and a decomposition temperature greater than 200° C. The second layer contains a second ethylene-based polymer. Also provided is a laminate containing said sealant layer.

First claim

We claim:

1. A laminate comprising:
a first film that is a corona-treated monolayer blown film and is a sealant layer comprising
(A) an ethylene/octene copolymer having a density from 0.910 g/cc to 0.930 g/cc and a melt index from 0.5 g/10 min to 25 g/10 min;
(B) from 590 ppm to 740 ppm of erucamide;
(C) from 260 ppm to 410 ppm of succinic acid;
(D) an erucamide to succinic acid weight ratio from 1.43:1 to 2.86:1; and

a second film that is polyethylene terephthalate, wherein the first film is laminated to the second film by way of
an adhesive layer selected from the group consisting of polyurethane adhesive and polyacrylate adhesive, the adhesive layer is in direct contact with the first film and the adhesive layer is in direct contact with the second film; and
the laminate has
a thickness from 70 μm to 100 μm,
a pre-lamination coefficient of friction less than 0.3, and
a Laminate Coefficient of Friction (COF) from 0.01 to 0.30.

2. The laminate of claim 1 , further comprising a third film, wherein the third film is laminated to the second film.

3. The laminate of claim 1 wherein the laminate is void of silicone.

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

• B32B2307/746

  Slipping, anti-blocking, low friction · CPC title

• B32B7/12 Primary

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B2250/02

  2 layers · CPC title

• B32B27/16

  specially treated, e.g. irradiated · CPC title