Pipes and tubular conduits – Flexible – Distinct layers
Patent
1990-10-31
1992-12-01
Bryant, III, James E.
Pipes and tubular conduits
Flexible
Distinct layers
138103, 138125, 138126, 138140, F16L 1100, F16L 1104
Patent
active
051672596
ABSTRACT:
A layered tubing for use in a motor vehicle has a thick tubular outer layer formed of a Nylon 11 or Nylon 12, a thin tubular inner solvent-blocking layer inside the outer layer and formed of a copolymer of ethylene and vinylalcohol, and a tubular intermediate layer between and bonded to the inner and outer layers and formed of polyethylene or polypropylene. The outer layer has a thickness of between 0.2 mm and 0.7 mm and the intermediate layer comprises by weight 30% to 45% polyethylene. The inner layer has a thickness of between 0.1 mm and 0.2 mm and the intermediate layer has a thickness of between 0.05 mm and 0.2 mm.
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Bryant III James E.
Dubno Herbert
Technoform Caprano & Brunnhofer KG
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