Patent US4774114A successfully refreshed from Google Patents.
US4774114A
Expired / Lapsed
US
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Injection stretch blow container
Assignee: Kuraray Co Ltd
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Filing: 1987-03-23
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Granted: 1988-09-27
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Expires: 2007-03-23
Abstract
Abstract An injection stretch blow container consisting of a combination of 97 to 70 parts by weight of saturated polyester and 3 to 30 parts by weight of a saponification product of an ethylene-vinyl acetate copolymer, said container having many areas, particularly at the body wall portion of said container in each of which areas substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20x20 mu ; vertical section or longitudinal section of the body wall of said container) is 0.001 to 1 mu m in average thickness and at least 5 in average aspect ratio and the laminated structural index represented by the following formula is at least 5: Laminated structural index <IMAGE> wherein Li represents a length of the overlapped portion of adjacent layers of the saponification product of the ethylene-vinyl acetate copolymer, and hi represents a distance between adjacent layers of saponification product of ethylene-vinyl acetate copolymer. This container has a high gas-barrier quality and is useful as a bottle for carbonated beverages or the like.
Inventors
- 👤 Tohei Moritani
- 👤 Syuji Kawai
- 👤 Kunihiko Shimamura
- 👤 Toshiaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:34
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/36; B65; B65D; B65D65/00; B65D65/38; B29; B29B; B29B11/00; B29B11/06; B29B11/08; B29B11/14; B29C; B29C2949/00; B29C2949/07; B29C2949/0715; B29C2949/081; B29C2949/0811; B29C2949/082; B29C2949/0829; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/26; B29C2949/28; B29C2949/30; B29C2949/3008; B29C2949/3012; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29C49/00; B29C49/071; B29K; B29K2067/00; B29K2105/00; B29K2105/0005; B29K2105/0032; B29K2105/0044; B29K2105/06; B29K2105/16; B29K2105/25; B29K2105/253; B29K2105/258; B29L; B29L2031/00; B29L2031/712; B29L2031/7158; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
179 words
An injection stretch blow container comprising a combination of 97 to 70 parts by weight of saturated polyester and 3 to 30 parts by weight of a saponification product of an ethylene-vinyl acetate copolymer, said container having many areas, particularly at the body wall portion of said container in which substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20×20 μm; vertical section or longitudinal section of the body wall of said container)is 0.001 to 1 μm in average thickness and is at least 5 in average aspect ratio, and the laminated structural index represented by the following formula is at least 5: Laminated structural index ##EQU4## wherein L i represents a length of the overlapped portion of adjacent layers of said saponification product of said ethylene-vinyl acetate copolymer, and h i represents a distance between adjacent layers of said saponification product of said ethylene-vinyl acetate copolymer.
Claim 2
Dependent Claim
179 words
An injection stretch blow container comprising a combination of 97 to 70 parts by weight of saturated polyester and 3 to 30 parts by weight of a saponification product of an ethylene-vinyl acetate copolymer, said container having many areas, particularly at the body wall portion of said container in which substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20×20 μm; vertical section or longitudinal section of the body wall of said container)is 0.001 to 1 μm in average thickness and is at least 5 in average aspect ratio, and the laminated structural index represented by the following formula is at least 5: Laminated structural index ##EQU4## wherein L i represents a length of the overlapped portion of adjacent layers of said saponification product of said ethylene-vinyl acetate copolymer, and h i represents a distance between adjacent layers of said saponification product of said ethylene-vinyl acetate copolymer.
Claim 3
Dependent Claim
37 words
A container according to claim 1, wherein said saponification product of said ethylene-vinyl acetate copolymer contains 25 to 60 mol% of ethylene vinyl units and the degree of saponification of acetic vinyl unit is at least 96%.
Claim 4
Dependent Claim
38 words
A container according to claim 1, wherein said saponification product of said ethylene-vinyl acetate copolymer contains 37 to 50 mol% of ethylene vinyl units and the degree of saponification of the acetic vinyl unit is at least 96%.
Claim 5
Dependent Claim
13 words
A container according to claim 1, wherein said saturated polyester is polyethylene terephthlate.
Claim 6
Dependent Claim
29 words
A container according to claim 1, wherein said saturated polyester is poly(ethylene terephthalate/iosphthalate) which contains 2 to 12 mol% of isophthalic acid in a monomer of an acid component.
Claim 7
Dependent Claim
104 words
A container according to claim 1, wherein said container has many areas, particularly at the body wall portion of said container, in which substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20×20 μm; vertical section or longitudinal section of the body wall of said container) is 0.001 to 0.2 μm in average thickness and is at least 10 in average aspect ratio, and the laminated structural index is at least 15.
Claim 8
Dependent Claim
17 words
A container according to claim 1, wherein the draw ratio of stretch blow is 5 to 20.
Claim 9
Dependent Claim
13 words
A container according to claim 2, wherein the saturated polyester is polyethylene terephthalate.
Claim 10
Dependent Claim
13 words
A container according to claim 3, wherein the saturated polyester is polyethylene terephthalate.
Claim 11
Dependent Claim
28 words
A container according to claim 2, wherein said saturated poly(ethylene terephthalate/isophthalate) which contains 2 to 12 mol % of isophthalic acid in a monomer of an acid component.
Claim 12
Dependent Claim
28 words
A container according to claim 3, wherein said saturated poly(ethylene terephthalte/isophthalate) which contains 2 to 12 mol % of isophthalic acid in a monomer of an acid component.
Claim 13
Dependent Claim
104 words
A container according to claim 2, wherein said container has many areas particularly at the body wall portion of said container in which substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20×20 m; vertical section section or longitudinal section of the body wall of said container) is 0.001 to 0.2 μm in average thickness and at least 10 in average aspect ratio, and the laminated structural index is at least 15.
Claim 14
Dependent Claim
103 words
A container according to claim 3, wherein said container has many areas particularly at the body wall portion of said container in which substantially two-dimensional thin layers of sid saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20×20 μm; vertical section or longitudinal section of the body wall of said container) is 0.001 to 0.2 μm in average thickness and at least 10 in average aspect ratio, and the laminated structural index is at least 15.
Claim 15
Dependent Claim
103 words
A container according to claim 4, wherein said container has many areas particularly at the body wall portion of said container in which substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20×20 m; vertical section or longitudinal section of the body wall of said container) is 0.001 to 0.2 μm in average thickness and at least 10 in average aspect ratio, and the laminated structural index is at least 15.
Claim 16
Dependent Claim
103 words
A container according to claim 5, wherein said container has many areas particularly at the body wall portion of said container in which substantially two-dimensional thin layers of said saponification product of said ethylene-vinyl acetate copolymer are laminated in parallel to the wall surface of said container in a matrix of saturated polyester, said saponification product of said ethylene-vinyl acetate copolymer in said area (20×20 m; vertical section or longitudinal section of the body wall of said container) is 0.001 to 0.2 μm in average thickness and at least 10 in average aspect ratio, and the laminated structural index is at least 15.
Claim 17
Dependent Claim
17 words
A container according to claim 2, wherein the draw ratio of stretch blow is 5 to 20.
Claim 18
Dependent Claim
17 words
A container according to claim 3, wherein the draw ratio of stretch blow is 5 to 20.
Claim 19
Dependent Claim
17 words
A container according to claim 4, wherein the draw ratio of stretch blow is 5 to 20.
Claim 20
Dependent Claim
17 words
A container according to claim 5, wherein the draw ratio of stretch blow is 5 to 20.
Claim 21
Dependent Claim
17 words
A container according to claim 6, wherein the draw ratio of stretch blow is 5 to 20.
References Cited (Backward Citations)
US4501781A
Cited
US4675219A
Cited
US4619849A
Cited
US4576988A
Cited
US4608286A
Cited
US4613644A
Cited
US4640870A
Cited
US4636551A
Cited
US4645695A
Cited
US4677006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |