Multilayer pipe
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United States of America Patent
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N/A
Issued Date -
May 23, 2002
app pub date -
Nov 15, 2001
filing date -
Nov 23, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A multilayer pipe is composed of at least three layers, wherein at least two of the layers are based on thermoplastic polyester, one layer is harder than the other layers, at least one of the other layers contains a thermoplastic polyesterelastomer. For preventing brittling of the material of the multilayer pipe, the radially innermost contains at least one of the materials polyolefin, polyolefin copolymer, polyolefin terpolymer, grafted polyolefin and polyamid, and at least one of the layers is modified against thermal aging.
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