Patent EP0600713A2 successfully refreshed from Google Patents.
Patent EP0199633A2 successfully refreshed from Google Patents.
EP0199633A2
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EP
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Method for molding multi-layered vessels
Assignee: Nissei ASB Machine Co Ltd
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Filing: 1986-04-10
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Granted: —
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Expires: 2006-04-10
Abstract
Abstract The present invention provides a multi-layered vessel whose sectional construction comprises at least a triple-layer obtained by blow or orientation blow molding an injection molded multi-layered parison, comprising a first resin forming a body, and a second resin having gas barrier properties or heat resistance more than that of the first resin, the second resin being present as an intermediate layer - (13) of the body within the first resin, the intermediate layer (13) being smaller in wall thickness than an outer layer (12) of the body and being one-sided toward the outer layer, the first layer being defined into an inner layer (11) and an outer layer (12) by the intermediate layer (13), the wall thicknesses of the outer layer (12) and the inner layer (11) being the ratio of outer layer to inner layer, 1 : 1.50 or more, preferably, in the range of 1 : 3.50.
Inventors
- 👤 Yoshinori Nissei Asb Machine Co. Ltd. Nakamura
- 👤 Hiroyuki Nissei Asb Machine Co. Ltd. Orimoto
- 👤 Kouichi Nissei Asb Machine Co. Ltd. Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/22; B29C45/00; B29C45/16; B29C45/164; B29C45/1642; B29C45/1646; B29C2045/1648; B29C2045/1656; B29C2949/00; B29C2949/30; B29C2949/3008; B29C2949/3009; B29C2949/3012; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29K; B29K2067/00; B29K2105/00; B29K2105/25; B29K2105/253; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/24; Y10T428/24942; Y10T428/2495
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
A multi-layered vessel whose sectional construction comprises at least a triple-layer obtained by blow or orientation blow molding an injection molded multilayered parison, characterized by a first resin forming a body, and a second resin having gas barrier properties or heat resistance more than that of the first resin, said second resin being present as an intermediate layer (13) of the body within the first resin, said intermediate layer being smaller in wall thickness than an outer layer (12) of the body and being onesided toward said outer layer, said first layer being defined into an inner layer (11) and an outer layer (12) by said intermediate layer (13), the wall thicknesses of the outer layer (12) and the inner layer (11) being in the ratio of outer layer to inner layer, 1 : 1.50 or more, preferably, in the range of 1 : 3.50.
Claim 2
Dependent Claim
145 words
A multi-layered vessel whose sectional construction comprises at least a triple-layer obtained by blow or orientation blow molding an injection molded multilayered parison, characterized by a first resin forming a body, and a second resin having gas barrier properties or heat resistance more than that of the first resin, said second resin being present as an intermediate layer (13) of the body within the first resin, said intermediate layer being smaller in wall thickness than an outer layer (12) of the body and being onesided toward said outer layer, said first layer being defined into an inner layer (11) and an outer layer (12) by said intermediate layer (13), the wall thicknesses of the outer layer (12) and the inner layer (11) being in the ratio of outer layer to inner layer, 1 : 1.50 or more, preferably, in the range of 1 : 3.50.
Claim 3
Dependent Claim
25 words
The multi-layered vessel as set forth in claim 1, wherein the first resin comprises polyethyleneterephtalate, and the second resin comprises an ethylene vinyl alcohol copolymer.
Claim 4
Dependent Claim
25 words
The multi-layered vessel as set forth in claim 1, wherein the first resin comprises polyethyleneterephtalate, and the second resin comprises a polyacrylate resin or polycarbonate.
Claim 5
Independent Claim
161 words
A method for molding a multi-layered vessel, comprising: using a double nozzle provided with an outer flowpassage in communication with a nozzle orifice and an inner flowpassage opened into an extreme end of said outer flowpassage, injecting a first resin (5) forming a body of a parison into a cavity from said inner flowpassage, injecting a second resin (6) forming an intermediate layer of the body in connection with the first resin into said first resin, molding the intermediate layer while being one-sided toward the outer layer, forming a multi- layered parison having at least a triple layer in which an inner layer formed from the first layer defined by the intermediate layer is materially smaller in wall thickness than that of an outer layer formed from the same resin, and blow or orientation blow molding said multilayered parison to mold a multi-layered vessel in which the inner layer is materially greater in wall thickness than that of the outer layer.
Claim 6
Independent Claim
161 words
A method for molding a multi-layered vessel, comprising: using a double nozzle provided with an outer flowpassage in communication with a nozzle orifice and an inner flowpassage opened into an extreme end of said outer flowpassage, injecting a first resin (5) forming a body of a parison into a cavity from said inner flowpassage, injecting a second resin (6) forming an intermediate layer of the body in connection with the first resin into said first resin, molding the intermediate layer while being one-sided toward the outer layer, forming a multi- layered parison having at least a triple layer in which an inner layer formed from the first layer defined by the intermediate layer is materially smaller in wall thickness than that of an outer layer formed from the same resin, and blow or orientation blow molding said multilayered parison to mold a multi-layered vessel in which the inner layer is materially greater in wall thickness than that of the outer layer.
Claim 7
Dependent Claim
119 words
The method for molding a multi-layered vessel as set forth in claim 4, wherein a predetermined quantity of the first resin (5) is injected from the inner flowpassage of the double nozzle into the cavity, thereafter said injection of the resin is once stopped, the second resin (6) is injected from the outer flowpassage to the first resin within the cavity, the injection of the first resin is restarted from the inner flowpassage after the lapse of the stopping time to inject the first resin and the second resin simultaneously, thereafter the injection of the second resin is stopped, and the time is further delayed and the injection of the first resin is stopped to mold a multi-layered parison.
References Cited (Backward Citations)
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