Multilayer film including odor barrier layer having sound dampening properties

Patent metadata

Field	Value
Publication number	US-2017042722-A1
Application number	US-201515301829-A
Country	US
Kind code	A1
Filing date	May 21, 2015
Priority date	Jun 24, 2014
Publication date	Feb 16, 2017
Grant date	—

Abstract

A multilayer film including an odor barrier layer having sound dampening properties is provided. The odor barrier layer is formed from a polyamide modified with a functionalized vinyl-bond rich triblock copolymer.

First claim

1 . A multilayer film comprising an odor barrier layer having sound dampening properties, wherein the odor barrier layer is formed from a polyamide modified with a functionalized vinyl-bond rich triblock copolymer.

2 . The multilayer film of claim 1 , wherein the vinyl-bond rich triblock copolymer is a vinyl-bond rich styrene-isoprene-styrene (SIS) block copolymer or a vinyl-bond rich styrene-ethylene-propylene-styrene (SEPS) block copolymer, wherein the vinyl-bond rich triblock copolymer is functionalized with maleic anhydride or epoxy, and reacted with a polyamide to modify the polyamide.

3 . The multilayer film of claim 1 , wherein the vinyl-bond rich triblock copolymer has a glass transition temperature between about −20° C. and about 20° C., and a temperature at tangent delta peak between about −10° C. and about 30° C., and a tangent delta value at room temperature between about 0.30 and about 1.5.

4 . The multilayer film of claim 1 , wherein the polyamide is an amorphous polyamide.

5 . The multilayer film of claim 1 , wherein the odor barrier layer is formed from a blend comprising about 85 wt.% of amorphous polyamide and about 15 wt.% of a vinyl-bond rich SIS block copolymer functionalized with a maleic anhydride, wherein the vinyl-bond rich SIS block copolymer has a glass transition temperature of about 8° C., a temperature at tangent delta peak of about 20° C., and a tangent delta of about 1.2 at room temperature.

6 . The multilayer film of claim 1 , wherein the odor barrier layer is formed from a blend comprising about 85 wt.% of amorphous polyamide and about 15 wt.% of a vinyl-bond rich SIS block copolymer functionalized with a maleic anhydride, wherein the vinyl-bond rich SIS block copolymer has a glass transition temperature of about −13° C., a temperature at tangent delta peak of about −3° C., and a tangent delta of about 0.7 at room temperature.

7 . The multilayer film of claim 1 , wherein the odor barrier layer is formed from a blend comprising about 85 wt.% of amorphous polyamide and about 15 wt.% of a vinyl-bond rich SEPS block copolymer functionalized with a maleic anhydride, wherein the vinyl-bond rich SEPS block copolymer has having a glass transition temperature of about −15° C., a temperature at tangent delta peak of about −5° C., and a tangent delta of about 0.45 at room temperature.

8 . The multilayer film of claim 1 , wherein the multilayer film is a five layer film having an outer layer/tie layer/odor barrier layer/tie layer/outer layer construction.

9 . The multilayer film of claim 1 , wherein the multilayer film is a five layer film having an outer layer/inner layer/tie layer/odor barrier layer/tie layer construction.

10 . The multilayer film of claim 1 , wherein the multilayer film is a four layer film having an outer layer/tie layer/odor barrier layer/tie layer construction.

11 . The multilayer film of claim 1 , wherein the multilayer film is a seven layer film having an outer layer/inner layer/tie layer/odor barrier layer/tie layer/inner layer/outer layer construction.

12 . The multilayer film of claim 1 , wherein the multilayer film is a six layer film having an outer layer/inner layer/tie layer/odor barrier layer/tie layer/outer layer construction.

13 . The multilayer film of claim 1 , wherein the multilayer film includes at least one outer layer, wherein the at least one outer layer is a seal layer comprising ethylene vinyl acetate (EVA) copolymer, ethylene methyl acrylate (EMA) copolymer, ethylene alpha olefin copolymer, olefin block copolymer (OBC), or ethylene-propylene (EP) copolymer, or blends thereof and each of the tie layer is formed from a maleated polyolefin.

14 . The multilayer film of claim 1 , wherein the multilayer film includes at least one inner layer comprising EVA, EMA, ethylene olefin copolymer, OBC, or EP copolymer.

15 . The multilayer film of claim 1 , wherein at least one additional layer comprises a sound dampening resin.

16 . An ostomy pouch, comprising:
a first wall; a second wall, wherein the first wall and the second wall are sealed along their peripheral edges to define a cavity; wherein at least one of the first wall and the second wall is formed from the multilayer film of claim 1 .

Assignees

• Hollister Inc

Inventors

• Chang Moh-Ching Oliver

Classifications

• B32B27/38

  comprising epoxy resins · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B27/06

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title

• B32B2439/06

  Bags, sacks, sachets · CPC title

• B32B2307/7248

  Odour barrier · CPC title