发明名称 |
Process for production of multi-layer pipes for draw-forming |
摘要 |
A process for the production of a multi-layer pipe to be used for formation of a bottle by drawblow-forming, comprising forming by co-extrusion a pipe having inner and outer layers of a polyester composed mainly of ethylene terephthalate units and an intermediate layer of an oxygen-barrier resin interposed between the inner and outer layers. An adhesive resin layer is preferable interposed between every two adjacent layers. The co-extruded multi-layer pipe is sized in the molten state so that the diameter of the pipe is uniform. The process continues by cooling the outer portion of the molten multi-layer pipe by contact with water and simultaneously introducing an inert gas or an inert gas containing a water mist into the interior of the pipe to thereby cool the inner portion of the pipe and prevent oxidation in the pipe. A multi-layer pipe prepared according to this process is excellent in the transparency and the draw-formability into a multi-layer drawn bottle.
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申请公布号 |
US4649004(A) |
申请公布日期 |
1987.03.10 |
申请号 |
US19840686507 |
申请日期 |
1984.12.26 |
申请人 |
TOYO SEIKAN KAISHA, LTD. |
发明人 |
NOHARA, SHIGEZO;SUGIMOTO, TAKESHI;SAKANO, KOZABURO;OHKUBO, YOSHIMICHI;MATSUO, JUNICHI |
分类号 |
B29C47/06;B29C47/88;B29C49/00;B29C49/04;B29C49/22;B29D22/00;(IPC1-7):B29C47/88 |
主分类号 |
B29C47/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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