Patent US4868026A successfully refreshed from Google Patents.
US4868026A
Expired / Lapsed
US
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Multilayered container and process for production thereof
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1988-08-09
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Granted: 1989-09-19
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Expires: 2008-08-09
Abstract
Abstract A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and having excellent gas-barrier property and delamination strength. The container comprises a substantially non-oriented mouth portion composed of resin A, a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately and a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately. A portion having a small radius of curvature where delamination tends to occur is formed in a three-layer structure. A process for producing the container is also provided.
Inventors
- 👤 Senzo Shimizu
- 👤 Yoshiaki Momose
- 👤 Yozo Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:50
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0207; B65D1/0215; B29; B29C; B29C45/00; B29C45/16; B29C45/1642; B29C45/1643; B29C49/00; B29C49/42; B29C49/78; B29C2049/7879; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/082; B29C2949/0826; B29C2949/0829; B29C2949/0849; B29C2949/0861; B29C2949/0872; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/30; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/303; B29C2949/3032; B29C49/08; B29C49/087; B29C49/42394; B29C49/4273; B29C49/4283; B29C49/42832; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/31504; Y10T428/31725; Y10T428/31736
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
149 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (3) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1), (2) and (3) extending in this order toward the bottom of the container.
Claim 2
Dependent Claim
149 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (3) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1), (2) and (3) extending in this order toward the bottom of the container.
Claim 3
Dependent Claim
117 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately and (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container.
Claim 4
Dependent Claim
117 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately and (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container.
Claim 5
Dependent Claim
117 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (2) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container.
Claim 6
Dependent Claim
117 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (2) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container.
Claim 7
Dependent Claim
383 words
A process for producing a biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (3) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1), (2) and (3) extending in this order toward the bottom of the container; which comprises injecting resins A and B into a mold cavity to form a parison, and thereafter stretch blow-molding the parison, wherein the parison is formed by adjusting the total amount of resin B to be injected to 1 to 25% of the volume of the mold cavity, and (a) injecting resin A alone in an amount corresponding to 20 to 70% of the volume of the cavity, (b) simultaneously injecting resin B in an amount corresponding to 5 to 35% by weight of the total amount of resin B to be injected and resin A in an amount 1.0 to 10 times the amount of the resin B to be injected in this step, (c) injecting resin B in an amount corresponding to 30 to 90% of the total amount of resin B to be injected either alone or together with resin A in an amount not more than 2 times the amount of resin B to be injected in this step, (d) simultaneously injecting resin B in an amount corresponding to 5 to 35% of the total amount of resin B injected and resin A in an amount 1.0 to 10 times the amount of resin B to be injected in this step, and (e) finally injecting resin A alone in an amount corresponding to 10 to 70% of the volume of the cavity to fill the cavity.
Claim 8
Dependent Claim
383 words
A process for producing a biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (3) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1), (2) and (3) extending in this order toward the bottom of the container; which comprises injecting resins A and B into a mold cavity to form a parison, and thereafter stretch blow-molding the parison, wherein the parison is formed by adjusting the total amount of resin B to be injected to 1 to 25% of the volume of the mold cavity, and (a) injecting resin A alone in an amount corresponding to 20 to 70% of the volume of the cavity, (b) simultaneously injecting resin B in an amount corresponding to 5 to 35% by weight of the total amount of resin B to be injected and resin A in an amount 1.0 to 10 times the amount of the resin B to be injected in this step, (c) injecting resin B in an amount corresponding to 30 to 90% of the total amount of resin B to be injected either alone or together with resin A in an amount not more than 2 times the amount of resin B to be injected in this step, (d) simultaneously injecting resin B in an amount corresponding to 5 to 35% of the total amount of resin B injected and resin A in an amount 1.0 to 10 times the amount of resin B to be injected in this step, and (e) finally injecting resin A alone in an amount corresponding to 10 to 70% of the volume of the cavity to fill the cavity.
Claim 9
Dependent Claim
308 words
A process for producing a biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately and (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container; which comprises injecting resins A and B into a mold cavity to form a parison, and thereafter stretch blow-molding the parison, wherein the parison is formed by adjusting the total amount of resin B to be injected to 1 to 25% of the volume of the mold cavity, and (a) injecting resin A alone in an amount corresponding to 20 to 70% of the volume of the cavity, (b) simultaneously injecting resin B in an amount corresponding to 10 to 70% by weight of the total amount of resin B to be injected and resin A in an amount 1.0 to 10 times the amount of the resin B to be injected in this step, (c) injecting resin B in an amount corresponding to 30 to 90% of the total amount of resin B to be injected either alone or together wtih resin A in an amount not more than 2 times the amount of resin B to be injected in this step, (d) finally injecting resin A alone in an amount corresponding to 10 to 70% of the volume of the cavity to fill the cavity.
Claim 10
Dependent Claim
308 words
A process for producing a biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately and (2) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container; which comprises injecting resins A and B into a mold cavity to form a parison, and thereafter stretch blow-molding the parison, wherein the parison is formed by adjusting the total amount of resin B to be injected to 1 to 25% of the volume of the mold cavity, and (a) injecting resin A alone in an amount corresponding to 20 to 70% of the volume of the cavity, (b) simultaneously injecting resin B in an amount corresponding to 10 to 70% by weight of the total amount of resin B to be injected and resin A in an amount 1.0 to 10 times the amount of the resin B to be injected in this step, (c) injecting resin B in an amount corresponding to 30 to 90% of the total amount of resin B to be injected either alone or together wtih resin A in an amount not more than 2 times the amount of resin B to be injected in this step, (d) finally injecting resin A alone in an amount corresponding to 10 to 70% of the volume of the cavity to fill the cavity.
Claim 11
Dependent Claim
304 words
A process for producing a biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (2) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container; which comprises injecting resins A and B into a mold cavity to form a parison, and thereafter stretch blow-molding the parison. wherein the parison is formed by adjusting the total amount of resin B to be injected to 1 to 25% of the volume of the mold cavity, and (a) injecting resin A alone in an amount corresponding to 20 to 70% of the volume of the cavity, (b) injecting resin B in an amount corresponding to 30 to 90% of the total amount of resin B to be injected either alone or together with resin A in an amount not more than 2 times the amount of resin B to be injected in this step, (c) simultaneously injecting resin B in an amount corresponding to 10 to 70% of the total amount of resin B injected and resin A in an amount 1.0 to 10 times the amount of resin B to be injected in this step, and (d) finally injecting resin A alone in an amount corresponding to 10 to 70% of the volume of the cavity to fill the cavity.
Claim 12
Dependent Claim
304 words
A process for producing a biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and a thermoplastic resin (resin A) other than resin B and comprising a substantially non-oriented mouth portion composed of resin A, and the remainder consisting of (1) a portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (2) a portion composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, the portions (1) and (2) extending in this order toward the bottom of the container; which comprises injecting resins A and B into a mold cavity to form a parison, and thereafter stretch blow-molding the parison. wherein the parison is formed by adjusting the total amount of resin B to be injected to 1 to 25% of the volume of the mold cavity, and (a) injecting resin A alone in an amount corresponding to 20 to 70% of the volume of the cavity, (b) injecting resin B in an amount corresponding to 30 to 90% of the total amount of resin B to be injected either alone or together with resin A in an amount not more than 2 times the amount of resin B to be injected in this step, (c) simultaneously injecting resin B in an amount corresponding to 10 to 70% of the total amount of resin B injected and resin A in an amount 1.0 to 10 times the amount of resin B to be injected in this step, and (d) finally injecting resin A alone in an amount corresponding to 10 to 70% of the volume of the cavity to fill the cavity.
Claim 13
Dependent Claim
119 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and thermoplastic resin (resin A) other than resin A, and comprising (a) a substantially non-oriented mouth portion composed of resin A, (b) a biaxially oriented portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (c) a biaxially oriented bent portion containing a rib part having a radius of curvature of not more than 5 mm and being composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately.
Claim 14
Dependent Claim
119 words
A biaxially oriented blow-molded container composed of a thermoplastic gas-barrier resin (resin B) and thermoplastic resin (resin A) other than resin A, and comprising (a) a substantially non-oriented mouth portion composed of resin A, (b) a biaxially oriented portion composed of three layers of resin A and two layers of resin B which are laminated with the resin A layer and the resin B layer occurring alternately, and (c) a biaxially oriented bent portion containing a rib part having a radius of curvature of not more than 5 mm and being composed of two layers of resin A and one layer of resin B which are laminated with the resin A layer and the resin B layer occurring alternately.
References Cited (Backward Citations)
US4550043A
Cited
US4728549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |