Lined hose including a thermoplastic liner bonded to a casing by hot melt adhesive
AssigneeApplied Polymer Technology, Inc.
InventorRichard L. Baker
Life of this patent
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Abstract
A lined hose has a hot melt adhesive bond between the thermoplastic liner and the outer thermoplastic fabric casing. The method of making this lined hose assembly includes the steps of extruding a tubular thermoplastic liner, applying hot melt adhesive to the liner, cooling and flattening the liner with adhesive, inserting the liner with adhesive into a hose casing, and bonding the liner to the thermoplastic casing by applying heat to melt and activate the adhesive and pressure to form the adhesive bond.
Claims21
A lined hose assembly comprising a length of flexible tubular liner, a flexible hose casing containing said tubular liner, and a hot melt adhesive in a longitudinal bead between said liner and said casing to bond a portion of said liner to a corresponding portion of said casing, said hot melt adhesive being selected from the group consisting of:
- (a) a hot melt adhesive comprising from about 10 to about 60 percent-by-weight of a polyether-based thermoplastic polyurethane and about 40 to about 90 percent-by-weight of polymeric fat acid polyamide;
- (B) a hot melt adhesive comprising from about 10 to about 25 percent-by-weight of a polyether-based thermoplastic polyurethane, up to about 50 percent-by-weight of a polymeric fat acid polyamide, and from about 25 to about 90 percent-by-weight of a thermoplastic copolyester;
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- (C) a hot melt adhesive comprising from about 10 to about 60 percent-by-weight of a polyether based thermoplastic polyurethane, up to about 90 percent-by-weight of a polymeric fat acid polyamide, and up to about 75 percent-by-weight of a polyester polyamide.
A liner adapted for use in a lined hose assembly comprising an extruded thermoplastic tubular liner having a generally flat cross-section and a thermoplastic hot melt adhesive set on at least a portion of the liner, said thermoplastic hot melt adhesive having a melt temperature equal to or higher than the blocking and heat distortion temperatures of said thermoplastic liner, said hot melt adhesive being selected from the group consisting of:
- (A) a hot melt adhesive comprising from about 10 to about 60 percent-by-weight of a polyether-based thermoplastic polyurethane and about 40 to about 90 percent-by-weight of polymeric fat acid polyamide;
- (B) a hot melt adhesive comprising from about 10 to about 25 percent-by-weight of a polyether-based thermoplastic polyurethane, up to about 50 percent-by-weight of a polymeric fat acid polyamide, and from about 25 about 90 percent-by-weight of a thermoplastic copolyester;
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- (C) a hot melt adhesive comprising from about 10 to about 60 percent-by-weight of a polyether based thermoplastic polyurethane, up to about 90 percent-by-weight of a polymeric fat acid polyamide, and up to about 75 percent-by-weight of a polyester polyamide.
A lined hose assembly comprising a length of flexible tubular liner adapted to be folded flat along diametrically opposite longitudinal fold lines, a flexible hose casing containing said tubular liner, and a hot melt adhesive applied in at least one longitudinal bead to said liner and disposed between said liner and said casing to bond a portion of said liner to a corresponding portion of said casing, said bead having a width of about 5 percent to about 12 percent of the circumference of said liner.
A lined hose assembly for carrying fluid under pressure comprising a length of circumferentially uniform flexible tubular liner, a flexible circumferentially uniform hose casing containing said tubular liner, a first portion of said tubular liner being pressed into tight engagement with a portion of the interior of said casing upon admission of fluid under pressure into said liner, and a hot melt adhesive in a narrow longitudinal bead between said liner and said casing bonding a second portion of said liner to a corresponding portion of said casing.
Dependencies are inferred from the claim text.