Abstract: A thermoplastic tube for transfer of hydrocarbon fuel comprising an inner fluoroplastic layer and an outer polyamide layer bonded to the fluoroplastic layer wherein an adhesion promoter is included in at least one of the layers is disclosed. The adhesion promoter is an unsubstituted or substituted phenol salt of 1,8-diazabicyclo-[5,4,0]undec-7-ene on a novolac carrier which functions to increase the adhesive bond strength between the two layers. The adhesion promoter provides a chemically bonded adhesion in addition to the mechanical adhesion associated with extrusion or lamination of the layers.

Abstract: A connector insert for coupling a hose to a tube and an assembly using the connector insert is described wherein the connector insert has a first end, a second end and a uniformly tubular body member along a longitudinal axis. The tubular body member further includes a es a flared member extending radially outward and in the direction of the first end to form an annular ridge and the flared member further tapers radially inward toward said first end forming a first annular rim adjacent the first end. The annular rim has a smaller circumference than the circumference of the annular ridge. The tapered portion enhances the ability of the hose to form a bead and also to prevent pull-off.

Abstract: A connector insert for coupling a hose to a tube and an assembly using the connector insert is described wherein the connector insert has a first end, a second end and a uniformly tubular body member along a longitudinal axis. The tubular body member further includes a es a flared member extending radially outward and in the direction of the first end to form an annular ridge and the flared member further tapers radially inward toward said first end forming a first annular rim adjacent the first end. The annular rim has a smaller circumference than the circumference of the annular ridge. The tapered portion enhances the ability of the hose to form a bead and also to prevent pull-off.

Abstract: A thermoplastic tube for transfer of hydrocarbon fuel comprising an inner fluoroplastic layer and an outer polyamide layer bonded to the fluoroplastic layer wherein an adhesion promoter is included in at least one of the layers is disclosed. The adhesion promoter is an unsubstituted or substituted phenol salt of 1,8-diazabicyclo-[5,4,0]undec-7-ene on a novolac carrier which functions to increase the adhesive bond strength between the two layers. The adhesion promoter provides a chemically bonded adhesion in addition to the mechanical adhesion associated with extrusion or lamination of the layers.

Abstract: A thermoplastic tube for transfer of hydrocarbon fuel comprising an inner fluoroplastic layer and an outer polyamide layer bonded to the fluoroplastic layer wherein an adhesion promoter is included in at least one of the layers is disclosed. The adhesion promoter is an unsubstituted or substituted phenol salt of 1,8-diazabicyclo-[5,4,0]undec-7-ene on a novolac carrier which functions to increase the adhesive bond strength between the two layers. The adhesion promoter provides a chemically bonded adhesion in addition to the mechanical adhesion associated with extrusion or lamination of the layers.

Abstract: A method for manufacturing a curved tubular article wherein said tubular article is composed of a thermoplastic, thermosetting, elastomeric, or a hybrid construction of an elastomer and a thermoplastic or thermosetting material, the tubular article having a predetermined three-dimensional serpentine configuration wherein the article exhibits a circular cross-section uniformly throughout the length of the article, the method comprising: providing a formable thermoplastic tubular preform; securing the ends of the preform to respective coupling members such that the preform is longitudinally interposed between the coupling members which are tensionally mounted on opposite sides of a base such that elongational tension is capable of being placed on the preform; filling the hollow interior of the preform with a heated fluid, the fluid being at a pressure sufficient to support the preform; applying mechanical pressure to the exterior surface of the fluid-containing preform at one or more predetermined areas along t