Patent · US Expired

Multilayer plastic pipe

US5478620A · kind A · utility

19Cited by

8References

9Claims

0Family size

Assignee

Huels Aktiengesellschaft · DE

Inventors

Joachim Mugge · Haltern, DE
Hubertus Ohm · Haltern, DE
Hans-Dieter Herrmann · Marl, DE
Hans Ries · Marl, DE

Key dates

Filing date	Feb 28, 1994
Grant date	Dec 26, 1995
Priority date	—
Expiry date	Feb 28, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/1393
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

Multilayer plastic pipes comprising a polyamide-based inner and outer layer, wherein the inner and outer layer are connected force-lockingly by means of at least one intermediate layer made of a mixture of a linear crystalline polyester and a polyamide, have improved stability to chemical agents and improved mechanical properties.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.