Method for manufacturing a high performance crosslinked thermoplastic hose and a high performance crosslinked thermoplastic hose produced thereby
AssigneeDayco Products, Inc.
InventorJayanta Bhattacharyya
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Abstract
A method for manufacturing a crosslinked thermoplastic hose capable of withstanding high temperatures and having chemical, abrasion, and tear resistant characteristics, for use in a high performance hose, comprising adding to an extruder a mixture comprising a thermoplastic polymer and a crosslinking agent; wherein the crosslinked hose is formed in the absence of a mandrel is disclosed.
Claims21
A method for preparing a high performance crosslinked thermoplastic polyurethane tubular member for use in the manufacture of a dimensionally oriented power steering hose capable of withstanding high temperature and having chemical resistant characteristics, said method comprising:
- adding to an extruder a thermoplastic polyurethane and an isocyanate crosslinking agent;
- and
- extruding said thermoplastic polyurethane and said isocyanate crosslinking agent at an elevated temperature and in the absence of a mandrel, wherein said thermoplastic polyurethane tubular member crosslinks during processing.
A high performance crosslinked thermoplastic polyurethane tubular member for use in the manufacture of a dimensionally oriented power steering hose, said thermoplastic polyurethane tubular member being prepared in accordance with a method which comprises adding to an extruder a thermoplastic polyurethane, and an isocyanate crosslinking agent;
- and extruding said thermoplastic polyurethane and said isocyanate crosslinking agent at an elevated temperature and in the absence of a mandrel, wherein said thermoplastic polyurethane tubular member crosslinks during processing.
A dimensionally oriented power steering hose comprising a first high performance crosslinked thermoplastic polyurethane tubular member as an inner tubular member, and a second high performance crosslinked thermoplastic polyurethane tubular member as an outer cover on said inner tubular member, said first high performance crosslinked thermoplastic polyurethane tubular member and said second high performance crosslinked thermoplastic polyurethane tubular member being prepared by adding to an extruder a thermoplastic polyurethane and an isocyanate crosslinking agent;
- and extruding said thermoplastic polyurethane and said isocyanate crosslinking agent at an elevated temperature and in the absence of a mandrel, wherein the first and second tubular members crosslink during processing.
Dependencies are inferred from the claim text.