EP0186279A2
Expired / Lapsed
EP
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Oriented multi-layer heat sealable film
Assignee: Mobil Oil AS
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Filing: 1985-10-25
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Granted: —
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Expires: 2005-10-25
Abstract
Abstract An oriented multi-layer heat sealable film structure comprising a polyolefin film substrate, a polymeric skin layer, a primer layer on the polymeric skin layer and a heat sealable layer on the primer layer.
Inventors
- 👤 Melvil Bernard Clauson
- 👤 Robert Edward Touhsaent
- 👤 John Ralph Wagner, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 18:15
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/052; C08J2323/00; C08J2323/02; C08J2427/00; C08J2427/02; C08J2427/04; C08J2427/06; C08J2433/00; C08J2433/04; C08J2433/06; C08J2433/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
127 words
A heat sealable multi-layer structure comprising: (a) a substrate comprising a polyolefin film; (b) a polymeric skin layer on at least one surface of (a) comprising: (1) a terpolymer of propylene with ethylene and 1-butene; (2) a blend of (i) a medium density polyethylene, a high density polyethylene or mixtures thereof; and (ii) polypropylene; (3) a very low density polyethylene or a blend thereof with propylene; or (4) a blend of (i) a linear low density copolymer of ethylene with a minor proportion of a C,-C,. alpha olefin, and (ii) polypropylene; (c) a primer coating between layers (b) and (c) on at least one of layer (b); and (d) a heat sealable layer on coating (c) and selected from a vinylidene chloride polymer and an acrylic polymer.
Claim 2
Dependent Claim
127 words
A heat sealable multi-layer structure comprising: (a) a substrate comprising a polyolefin film; (b) a polymeric skin layer on at least one surface of (a) comprising: (1) a terpolymer of propylene with ethylene and 1-butene; (2) a blend of (i) a medium density polyethylene, a high density polyethylene or mixtures thereof; and (ii) polypropylene; (3) a very low density polyethylene or a blend thereof with propylene; or (4) a blend of (i) a linear low density copolymer of ethylene with a minor proportion of a C,-C,. alpha olefin, and (ii) polypropylene; (c) a primer coating between layers (b) and (c) on at least one of layer (b); and (d) a heat sealable layer on coating (c) and selected from a vinylidene chloride polymer and an acrylic polymer.
Claim 3
Dependent Claim
27 words
The structure of claim 1 wherein the polyolefin film comprises homopolymer polypropylene interblended with from 0 to about 15 parts by weight of the polymeric skin layer.
Claim 4
Dependent Claim
76 words
The structure of claim 1 or 2 wherein the primer comprises a member selected from poly(ethyleneimine); the reaction product of an acidified aminoethylated vinyl polymer and an epoxy resin; the condensation product of a monoaldehyde with an interpolymer of acrylamide or methacrylamide and at least one other unsaturated monomer ; and the condensation product of aminoaldehyde with acrylamide or methacrylamide interpolymerized with at least one other unsaturated monomer in the presence of a C,-C. alkanol. -
Claim 5
Dependent Claim
20 words
The structure of claim 1, 2 or 3 wherein the coextruded layer (b) is on one surface of substrate (a).
Claim 6
Dependent Claim
19 words
The structure of claim 1, 2 or 3 wherein the coextruded layer is on both surfaces of substrate (a).
Claim 7
Dependent Claim
30 words
The structure of claim 1, 2, 3, 4 or 5 wherein the heat sealable layer (d) comprises a vinylidene chloride copolymer containing at least 50% by weight of vinylidene chloride.
Claim 8
Dependent Claim
47 words
The structure of claim 6 wherein said heat sealable layer (d) comprises an interpolymer of a minor amount by weight of acrylic acid, methacrylic acid or mixtures thereof and a major amount of neutral monomer esters comprising (1) methyl acrylate or ethyl acrylate and (2) methyl methacrylate.
Claim 9
Dependent Claim
36 words
The structure of any one of claims 1-7 wherein the heat sealable acrylic polymer is on one surface of the structure and the heat sealable vinylidene chloride polymer is on the opposite surface of the structure.
Claim 10
Dependent Claim
23 words
The structure of any one of claims 1-8 wherein layer (b) (1) contains from 1-7 wt% ethylene and from 1-7 wL% of 1-butene.
Claim 11
Dependent Claim
36 words
The structure of any one of claims 1-8 wherein in layer (b)(2) the density of the medium density polyethylene is from 0.926 to 0.940 gm/cc and the high density polyethylene is from 0.941 to 0.965 gm/cc.
Claim 12
Dependent Claim
24 words
The structure of any one of claims 1 -8 and 10 wherein layer (b)(2) comprises a blend of 2-100% of polyethylene and 98-0% polypropylene.
Claim 13
Dependent Claim
22 words
The structure of any one of claims 1-8 wherein the very low density polyethylene has a density of less than 0.910 gm/cc.
Claim 14
Dependent Claim
27 words
The structure of any one of claims 1-8 and 12 wherein layer (b)(3) comprises a blend of 2-100 wt% very low density polyethylene and 98-0 wt.% polypropylene.
Claim 15
Dependent Claim
26 words
The structure of any one of claims 1-8 wherein layer (b)(4) comprises a blend of 2-100 wt% linear low density polyethylene copolymer and 98-0 wt.% polypropylene.
Claim 16
Dependent Claim
33 words
The structure of any one of claims 1-8 and 14 wherein the copolymer in layer (d)(i) comprises 2 to 8 wt% the C 1 -C 10 alpha olefin and the remainder being ethylene.
References Cited (Backward Citations)
No citation records indexed.
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