| 发明名称 |
CO-EXTRUDED MULTILAYER PLASTIC PIPE, METHOD FOR PRODUCING THE SAME, AND DEVICE THEREFOR |
| 摘要 |
The invention relates to a co-extruded multilayer plastic pipe comprising an inner pipe (1) and an outer pipe (2) and between them a middle layer (3) of a softer material than the inner pipe. The invention also relates to a method for producing a co-extruded multilayer pipe in a multilayer extruder, and an apparatus for producing a co-extruded multilayer pipe. |
| 申请公布号 |
CA2239870(A1) |
申请公布日期 |
1997.06.19 |
| 申请号 |
CA19962239870 |
申请日期 |
1996.12.12 |
| 申请人 |
UPONOR B.V. |
发明人 |
J RVENKYL , JYRI |
| 分类号 |
B29B15/12;B29C44/22;B29C47/00;B29C47/02;B29C47/06;B29C47/20;B29C47/24;B29C47/52;B29C47/76;B29C47/90;B29C53/58;B29C55/24;B29D23/00;B32B1/08;F16L9/12;F16L59/14 |
主分类号 |
B29B15/12 |
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