Method of making polymeric hose
AssigneeDayco Corporation
InventorsDoyle V. Haren, William M. Edwards
Life of this patent
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Abstract
A polymeric hose and method of making same are provided wherein such hose comprises an inner base tube, a reinforcing braid made of aramid yarn disposed concentrically around the base tube with the aramid yarn having great affinity for water, a cover tube disposed concentrically around the reinforcing braid, and a moisture-impervious tubular film disposed between the braid and cover tube with the film isolating the aramid yarn and resulting in a tubular zone between the braid and cover tube free of water moisture created bubbles.
Claims6
In a method of making a polymeric hose comprising the steps of, providing a polymeric inner base tube, braiding a reinforcing braid made of aramid yarn concentrically around and against said base tube, said aramid yarn having great affinity for water, providing a layer of plastisol adhesive around said braid, flame curing said adhesive layer, and disposing a cover tube concentrically around said reinforcing braid and adhesive layer, the improvement comprising the steps of, applying a moisture impervious tubular film against said braid, and drying said film, said applying and drying steps being achieved following said braiding step and prior to said adhesive providing step, said film isolating said aramid yarn and resulting in a tubular zone between said cover tube and braid free of water moisture created bubbles.
Dependencies are inferred from the claim text.