US4511610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer drawn plastic vessel
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1983-09-29
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Granted: 1985-04-16
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Expires: 2003-09-29
Abstract
Abstract Disclosed is a multi-layer drawn plastic vessel comprising at least one layer composed mainly of at least one crystalline olefin resin selected from crystalline polypropylene and crystalline propylene/ethylene copolymers having an ethylene content of 1 to 20 mole %, at least one oxygen-barrier layer composed mainly of an ethylene/vinyl alcohol copolymer having an ethylene content of 25 to 60 mole %, and an adhesive resin layer interposed between said two resin layers, said adhesive resin layer containing an acid- or acid anhydride-modified, linear, low-density polyethylene or a mixture of said polyethylene with an acid- or acid anhydride-modified propylene resin and said crystalline olefin resin layer being molecularly oriented in at least one direction.
Inventors
- 👤 Jinichi Yazaki
- 👤 Kozaburo Sakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:51
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/322; B32B7/00; B32B7/04; B32B7/12; B32B2250/00; B32B2250/24; B32B2307/00; B32B2307/70; B32B2307/704; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2323/00; B32B2323/04; B32B2323/046; B32B2439/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
A multi-layer drawn plastic vessel comprising at least one layer comprising at least one crystalline olefin resin selected from the group consisting of crystalline polypropylene and crystalline propylene/ethylene copolymers having an ethylene content of 1 to 20 mole %, at least one oxygen-barrier layer comprising an ethylene/vinyl alcohol copolymer having an ethylene content of 25 to 60 mole %, and an adhesive resin layer interposed between said two resin layers, said adhesive resin layer comprising an acid- or acid anhydride--modified, linear, low-density polyethylene and said crystalline olefin resin layer being molecularly oriented in at least one direction.
Claim 2
Dependent Claim
97 words
A multi-layer drawn plastic vessel comprising at least one layer comprising at least one crystalline olefin resin selected from the group consisting of crystalline polypropylene and crystalline propylene/ethylene copolymers having an ethylene content of 1 to 20 mole %, at least one oxygen-barrier layer comprising an ethylene/vinyl alcohol copolymer having an ethylene content of 25 to 60 mole %, and an adhesive resin layer interposed between said two resin layers, said adhesive resin layer comprising an acid- or acid anhydride--modified, linear, low-density polyethylene and said crystalline olefin resin layer being molecularly oriented in at least one direction.
Claim 3
Dependent Claim
35 words
A vessel as set forth in claim 1, wherein the adhesive resin layer contains carbonyl groups derived from the acid or acid anhydride at a concentration of 1 to 600 meq/100 g of the polymer.
Claim 4
Dependent Claim
40 words
A vessel as set forth in claim 1, wherein the acid- or acid anhydride-modified, linear, low-density polyethylene has a density of 0.915 to 0.935 g/cm 3 and a melt tension of 5 to 9 g as measured at 170° C.
Claim 5
Dependent Claim
26 words
A vessel as set forth in claim 1, wherein the acid- or acid anhydride-modified, linear, low-density polyethylene has a melting point of 115° to 135° C.
Claim 6
Dependent Claim
112 words
A multi-layer drawn plastic vessel comprising at least one layer comprising at least one crystalline olefin resin selected from the group consisting of crystalline polypropylene and crystalline propylene/ethylene copolymers having an ethylene content of 1 to 20 mole %, at least one oxygen-barrier layer comprising an ethylene/vinyl alcohol copolymer having an ethylene content of 25 to 60 mole %, and an adhesive layer interposed between said two resin layers, said adhesive layer comprising an acid- or acid anhydride-modified, linear, low-density polyethylene and an acid- or acid anhydride-modified propylene resin at a weight ratio of from 95/5 to 50/50 and said crystalline olefin resin layer being molecularly oriented in at least one direction.
Claim 7
Dependent Claim
112 words
A multi-layer drawn plastic vessel comprising at least one layer comprising at least one crystalline olefin resin selected from the group consisting of crystalline polypropylene and crystalline propylene/ethylene copolymers having an ethylene content of 1 to 20 mole %, at least one oxygen-barrier layer comprising an ethylene/vinyl alcohol copolymer having an ethylene content of 25 to 60 mole %, and an adhesive layer interposed between said two resin layers, said adhesive layer comprising an acid- or acid anhydride-modified, linear, low-density polyethylene and an acid- or acid anhydride-modified propylene resin at a weight ratio of from 95/5 to 50/50 and said crystalline olefin resin layer being molecularly oriented in at least one direction.
Claim 8
Dependent Claim
37 words
A vessel as set forth in claim 5, wherein the weight ratio of the acid- or acid anhydride-modified, linear, low-density polyethylene to the acid- or acid anhydride-modified propylene is in the range of from 90/10 to 60/40.
Claim 9
Dependent Claim
38 words
A vessel as set forth in claim 5, wherein the acid- or acid anhydride-modified propylene resin contains carbonyl groups derived from the acid or acid anhydride at a concentration of 1 to 600 meq/100 g of the polymer.
Claim 10
Dependent Claim
25 words
A vessel as set forth in claim 5, wherein the acid- or acid anhydride-modified propylene resin has a melting point of 148° to 167° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |