公开(公告)号：EP0879142B1

公开(公告)日：2003-07-02

申请号：EP96945891.8

申请日：1996-11-18

申请人： Uponor Rohrsysteme GmbH ,  REHAU AG + Co

发明人： RAHN, Horst

IPC分类号： B32B1/08 ,  B32B3/28 ,  B32B5/18 ,  F16L9/06 ,  F16L9/14 ,  F16L11/11 ,  F16L11/15

CPC分类号： F16L9/121 ,  F16L9/12

摘要： This invention concerns multilayer plastic tubing with a smooth inner tube (12) and a corrugated outer tube (14). The smooth inner tube (12) consists of a first plastic and the corrugated outer tube (14) consists of a second plastic which is foamed using a propellant. The wall thickness (D) of the corrugated outer tube (14) is at least 10 % of the average corrugation width (WB) of the corrugated outer tube (14). The inner tube (12) can be made of uniform plastic or of recycled material. The outer tube (14) can be made of recycled PE and/or PP and/or PVC.

公开(公告)号：EP0879142A1

公开(公告)日：1998-11-25

申请号：EP96945891.0

申请日：1996-11-18

申请人： UNICOR ROHRSYSTEME GmbH ,  REHAU AG + Co

发明人： RAHN, Horst

IPC分类号： F16L9

CPC分类号： F16L9/121 ,  F16L9/12

摘要： This invention concerns multilayer plastic tubing with a smooth inner tube (12) and a corrugated outer tube (14). The smooth inner tube (12) consists of a first plastic and the corrugated outer tube (14) consists of a second plastic which is foamed using a propellant. The wall thickness (D) of the corrugated outer tube (14) is at least 10 % of the average corrugation width (WB) of the corrugated outer tube (14). The inner tube (12) can be made of uniform plastic or of recycled material. The outer tube (14) can be made of recycled PE and/or PP and/or PVC.