Patent US1024997A successfully refreshed from Google Patents.
EP0407880A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multilayer containers and method of making same
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1990-07-04
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Granted: —
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Expires: 2010-07-04
Abstract
Abstract A plastic container having a plastic wall that includes two plastic layers bonded together without a separate adhesive layer, the two layers being a barrier layer and a support layer, the support layer being a blend of a polyolefin, a polymer having a polar group and a barrier polymer.
Inventors
- 👤 Saleh A. Jabarin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:14
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31725; Y10T428/31728; Y10T428/31732; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
A container having a wall with at least two layers bonded together without a separate adhesive layer, one layer being a support layer that is a blend of a polyolefin and a polymer having a polar group, and the other layer being a barrier layer that is a polyamide or a copolymer of ethylene and vinyl alcohol.
Claim 2
Dependent Claim
57 words
A container having a wall with at least two layers bonded together without a separate adhesive layer, one layer being a support layer that is a blend of a polyolefin and a polymer having a polar group, and the other layer being a barrier layer that is a polyamide or a copolymer of ethylene and vinyl alcohol.
Claim 3
Dependent Claim
17 words
A container as defined in claim 1 in which the polar group is derived from maleic anhydride.
Claim 4
Dependent Claim
26 words
A container as defined in claim 1 in which the polymer with a polar group is a maleic anhydride functionalized block copolymer of styrene and ethylene/butylene.
Claim 5
Dependent Claim
32 words
A container as defined in claim 1 in which the polyolefin is polyethylene or polypropylene, the barrier polymer is polyamide and polyamide is also included in the blend in the support layer.
Claim 6
Dependent Claim
22 words
A container as defined in claim 4 in which the polymer having a polar group is a polymer formed with maleic anhydride.
Claim 7
Dependent Claim
43 words
A container having a wall with two layers bonded together without a separate adhesive layer, one layer being a polymer blend of (A) a polyolefin, (B) a polymer having a polar group, and (C) a polyamide; and the other layer being a polyamide.
Claim 8
Dependent Claim
43 words
A container having a wall with two layers bonded together without a separate adhesive layer, one layer being a polymer blend of (A) a polyolefin, (B) a polymer having a polar group, and (C) a polyamide; and the other layer being a polyamide.
Claim 9
Dependent Claim
53 words
A container having a wall with two layers bonded together without a separate adhesive layer, one layer being a polymer blend of (A) a polyolefin, (B) a polymer with a polar group, and (C) a copolymer of ethylene and vinyl alcohol; and the other layer being a copolymer of ethylene and vinyl alcohol.
Claim 10
Dependent Claim
53 words
A container having a wall with two layers bonded together without a separate adhesive layer, one layer being a polymer blend of (A) a polyolefin, (B) a polymer with a polar group, and (C) a copolymer of ethylene and vinyl alcohol; and the other layer being a copolymer of ethylene and vinyl alcohol.
Claim 11
Dependent Claim
43 words
A container as defined in claim 6 in which the polymer blend has about 60 to 90 weight percent polyolefin, about 5 to 20 weight percent of a polymer having a polar group, and about 5 to 20 weight percent of a polyamide.
Claim 12
Dependent Claim
39 words
A container having a wall with two layers bonded together without a separate adhesive layer, one layer being a polymer blend of (A) high density polyethylene, (B) polyethylene vinyl acetate, and (C) nylon; and the other layer being nylon.
Claim 13
Dependent Claim
39 words
A container having a wall with two layers bonded together without a separate adhesive layer, one layer being a polymer blend of (A) high density polyethylene, (B) polyethylene vinyl acetate, and (C) nylon; and the other layer being nylon.
Claim 14
Dependent Claim
70 words
A container having a wall with two layers bonded together without a separate adhesive layer, the layers comprising (1) a support layer that is a blend of (A) a polyolefin, (B) a polymer with a polar group, (C) a barrier polymer that is a polyamide or a copolymer of ethylene and vinyl alcohol; and (2) a barrier layer that is a polyamide or a copolymer of ethylene and vinyl alcohol.
Claim 15
Dependent Claim
70 words
A container having a wall with two layers bonded together without a separate adhesive layer, the layers comprising (1) a support layer that is a blend of (A) a polyolefin, (B) a polymer with a polar group, (C) a barrier polymer that is a polyamide or a copolymer of ethylene and vinyl alcohol; and (2) a barrier layer that is a polyamide or a copolymer of ethylene and vinyl alcohol.
Claim 16
Independent Claim
86 words
A method of making a plastic container with a plastic wall having two plastic layers bonded together without a separate adhesive layer, the method comprising heating (1) a support layer that is a blend of (A) a polyolefin, (B) a polymer having a polar group, and optionally, (C) a barrier polymer that is a polyamide or a copolymer of ethylene and vinyl alcohol; and (2) a barrier layer that is a barrier polymer as defined as an optional ingredient in the blend of the support layer.
Claim 17
Independent Claim
86 words
A method of making a plastic container with a plastic wall having two plastic layers bonded together without a separate adhesive layer, the method comprising heating (1) a support layer that is a blend of (A) a polyolefin, (B) a polymer having a polar group, and optionally, (C) a barrier polymer that is a polyamide or a copolymer of ethylene and vinyl alcohol; and (2) a barrier layer that is a barrier polymer as defined as an optional ingredient in the blend of the support layer.
References Cited (Backward Citations)
US4605576A
Cited
US4605576B1
Cited
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