EP0161185A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multi-layer synthetic resin can body and method for manufacturing the same
Assignee: Nissei ASB Machine Co Ltd
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Filing: 1985-04-26
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Granted: —
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Expires: 2005-04-26
Abstract
Abstract This invention provides a biaxially oriented multi- layer synthetic resin can body an method for manufacturing the same wherein despite a synthetic resin can body of a multi layer construction which is manufactured by cutting a bottle-like intermediate member (6) obtained by stretch blow molding a bottomed parison (1), the cut resin can be used again as resin material and when an open edge is cut and formed for seaming, an end of each layer is not exposed and peeling between layers is hard to occur, the can body being economical and excellent in durability, gas barrier property and heat resistance.
Inventors
- 👤 Daiichi C/O Nissei Asb Machine Co. Ltd. Aoki
- 👤 Hiroyuki C/O Nissei Asb Machine Co. Ltd. Orimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 09:29
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/22; B29C49/08; B29C49/10; B29C49/12; B29C49/42; B29C49/4273; B29C49/4278; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/135; B29C66/1352; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/54; B29C66/542; B29C66/545; B29C66/61; B29C66/612; B29C66/70; B29C66/71; B29C66/74; B29C66/742; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/36; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/28; B29C2949/00; B29C2949/07; B29C2949/076; B29C2949/0768; B29C2949/077; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/30; B29C2949/3016; B29C2949/3018; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/303; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29C2949/3038; B29C66/72; B29C66/723; B29C66/7234; B29C66/72341; B29L; B29L2009/00; B29L2031/00; B29L2031/712; B29L2031/717; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/50; B32B2307/514; B32B2307/518; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2439/00; B32B2439/40; B32B2439/66
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
185 words
A multi-layer synthetic resin can body (9) whose body (91) and bottom (92) are integral and which has an open edge (8) capable of providing seaming at a lower side of an extended portion, said can body being manufactured by molding a bottomed parison (1) formed of thermoplastic resin such as polyethylene terephthalate by injection or extrusion molding, forming said parison into a biaxially oriented bottle-like intermediate member (6) continuously having an extended portion (7) formed by expanding it more outwardly than the body at the upper end of the body using a blow mold and a stretching rod prepared beforehand, and cutting said intermediate member (6) at the lower side (71) of said extended portion, characterized in that the body (91) and bottom (92) comprise at least a three-layer construction comprising an intermediate layer (2) between an internal layer (9b) and an external layer (9a), said intermediate layer (2) having a front end edge (2a) positioned at the underside of said open edge (8), said open edge being constructed merely by the resin which forms said internal layer (9b) and said external layer (9a).
Claim 2
Dependent Claim
185 words
A multi-layer synthetic resin can body (9) whose body (91) and bottom (92) are integral and which has an open edge (8) capable of providing seaming at a lower side of an extended portion, said can body being manufactured by molding a bottomed parison (1) formed of thermoplastic resin such as polyethylene terephthalate by injection or extrusion molding, forming said parison into a biaxially oriented bottle-like intermediate member (6) continuously having an extended portion (7) formed by expanding it more outwardly than the body at the upper end of the body using a blow mold and a stretching rod prepared beforehand, and cutting said intermediate member (6) at the lower side (71) of said extended portion, characterized in that the body (91) and bottom (92) comprise at least a three-layer construction comprising an intermediate layer (2) between an internal layer (9b) and an external layer (9a), said intermediate layer (2) having a front end edge (2a) positioned at the underside of said open edge (8), said open edge being constructed merely by the resin which forms said internal layer (9b) and said external layer (9a).
Claim 3
Dependent Claim
35 words
A can body according to claim 1, characterized in that said intermediate layer (2) comprises a thermoplastic resin excellent in gas barrier property or heat resistance, or an inorganic material mixed with the thermoplastic resin.
Claim 4
Independent Claim
154 words
A method for manufacturing a multi-layer synthetic resin can body, the method comprising using a double nozzle (10) in which at least two resin passages are disposed in the form of a concentrical circle to mold at least a three-layer bottomed parison (1) in which a front end edge (2a) of an intermediate layer (2) is positioned below a neck portion (3), stretch blow molding (B), from the multi-layer bottomed parison, a bottle-like intermediate member (6) in which body and bottom are at least a three-layer and a portion above an extended portion (7) more inflated than said body is a single layer, and cutting off said extended portion (7) of the intermediate member (6) at the lower side (71) to obtain an can body (9) in which an open edge (8) by said lower side (71) is a single layer, and the body (91) and bottom (92) are at least a three-layer construction.
Claim 5
Independent Claim
154 words
A method for manufacturing a multi-layer synthetic resin can body, the method comprising using a double nozzle (10) in which at least two resin passages are disposed in the form of a concentrical circle to mold at least a three-layer bottomed parison (1) in which a front end edge (2a) of an intermediate layer (2) is positioned below a neck portion (3), stretch blow molding (B), from the multi-layer bottomed parison, a bottle-like intermediate member (6) in which body and bottom are at least a three-layer and a portion above an extended portion (7) more inflated than said body is a single layer, and cutting off said extended portion (7) of the intermediate member (6) at the lower side (71) to obtain an can body (9) in which an open edge (8) by said lower side (71) is a single layer, and the body (91) and bottom (92) are at least a three-layer construction.
Claim 6
Dependent Claim
39 words
A method for manufacturing a can body according to claim 3, characterized in that said intermediate layer (2) comprises a thermoplastic resin excellent in gas barrier property or heat resistance, or an inorganic material mixed with the thermoplastic resin.
References Cited (Backward Citations)
No citation records indexed.
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