Peelable film for container lid

Patent metadata

Field	Value
Publication number	US-2016152013-A1
Application number	US-201615018049-A
Country	US
Kind code	A1
Filing date	Feb 8, 2016
Priority date	Mar 15, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

A peelable multilayer film includes a seal layer (peel layer) and at least one core layer. The peelable multilayer film can bond to a container.

First claim

1 . A peelable multilayer film comprising
a seal layer comprising a polypropylene copolymer and at least one core layer comprising ethyl vinyl acetate (EVA) and polybutene-1 (PB-1), wherein the core layer comprising EVA and PB-1 is directly adjacent to the seal layer.

2 . The film of claim 1 , wherein the film comprises five layers.

3 . The film of claim 1 , further comprising a second core layer comprising LLDPE.

4 . The film of claim 1 , further comprising a third core layer comprising polypropylene.

5 . The film of claim 1 , further comprising a fourth core layer comprising LDPE.

6 . The film of claim 1 , further comprising a fourth core layer comprising LLDPE.

7 . The film of claim 1 , further comprising a second core layer comprising LDPE and LLDPE.

8 . The film of claim 1 , further comprising a second core layer comprising LLDPE, a third core layer comprising polypropylene, and a fourth core layer comprising LDPE.

9 . The film of claim 1 , further comprising a second core layer comprising LLDPE, a third core layer comprising polypropylene, and a fourth core layer comprising LLDPE.

10 . The film of claim 1 , further comprising a second core layer comprising LLDPE, a third core layer comprising polypropylene, and a fourth core layer comprising LDPE and LLDPE.

11 . The film of claim 1 , wherein the polypropylene copolymer has a melt index of about 4 to about 10.

12 . The film of claim 11 , wherein the polypropylene copolymer has a melt index of about 4.6.

13 . The film of claim 1 , wherein the seal layer further comprises a slip agent.

14 . The film of claim 13 , wherein the slip agent is erucamide.

15 . A vessel comprising
a container and a peelable multilayer film coupled to the container to form a receiving space therebetween, wherein the peelable multilayer film comprises a seal layer comprising a polypropylene copolymer that forms a peelable seal to the container and at least one core layer comprising ethyl vinyl acetate (EVA) and polybutene-1 (PB-1) and wherein the core layer comprising EVA and PB-1 is directly adjacent to the seal layer.

16 . The vessel of claim 15 , wherein the vessel further includes a skin and the peelable multilayer film is laminated to the skin to locate the peelable multilayer film between the skin and the container.

17 . The vessel of claim 16 , wherein the skin is PET.

18 . The vessel of claim 17 , wherein the PET is a laminate flexible film of biaxially oriented PET.

19 . The vessel of claim 15 , wherein the seal layer adhesively fails or delaminates from the adjacent layer.

20 . The vessel of claim 15 , wherein the peelable seal has a bond strength of about 800 g/in to about 1600 g/in.

Assignees

• Berry Plastics Corp

Inventors

• Gillespie Bryan

Classifications

• B32B27/306

  comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title

• B65D65/40

  Applications of laminates for particular packaging purposes {(B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or)} · CPC title

• B32B1/02

  Operations & Transport · mapped topic

• B32B27/08 Primary

  of synthetic resin · CPC title

• B32B2250/24

  All layers being polymeric · CPC title