A hose which has at least the following plies in the following order: an innermost layer (A4) which is based on thermoplastic material or thermoplastic elastomer material; an internal layer (A5) which is applied to the innermost layer (A4) and which is based on elastomer material; at least one reinforcing element ply (B, B1, B2), wherein the reinforcing element is arranged at an angle smaller than the neutral angle of 54.7?, and possibly an external layer (C) which is based on polymer material. The hose is suitable in particular as a pressure carrier hose for refrigerant lines, in particular for CO.sub.2, for use as a pressure carrier of corrugated pipes.

A fluid transport hose includes an inner layer including a thermoplastic resin composition containing a thermoplastic resin and an elastomer, a reinforcing layer disposed on an outer side of the inner layer, and an outer layer disposed on an outer side of the reinforcing layer, the thermoplastic resin composition having a storage modulus E.sub.L at ?40? C. and a storage modulus E.sub.H at 80? C. satisfying Formulas (1), (2), and (3): E.sub.L?1500 MPa . . . (1), E.sub.H?40 MPa . . . (2), E.sub.H/E.sub.L?0.05 . . . (3).

A hose assembly includes an inner hose component, a first braid of reinforcement fiber material that extends around the inner hose component, and a second braid of reinforcement fiber material that extends around the first braid. The first braid and the second braid each has a 3 over 3 braid design, and the first braid has a first modulus and the second braid has a second modulus different from the first modulus. The first braid may be a high strength braid having a strength greater than a strength of the second braid, and the second braid may be a high modulus braid having a modulus greater than a modulus of the first braid. The hose assembly optionally may have a third braid with a high angle configuration of the braid segments. The hose assembly may be combined with an enhanced fitting for securing the hose assembly to fluid system equipment.

A flexible hose reinforced with at least two superimposed textile layers includes an inner load-bearing tubular layer defining a longitudinal axis and made of a first polymeric or elastomeric material, an outer cover layer made of a second polymeric or elastomeric material, and a first and a second reinforced textile layer mutually superimposed and interposed between the inner and outer layers. The first and the second textile layers are both knitted textile layers with tricot chain stitches having courses of stitches and rows of stitches, the courses of stitches being substantially parallel to each other and to the longitudinal axis, the rows of stitches having opposite inclinations with respect to the longitudinal axis. A production line and a method of manufacturing such hose.

A stitched double layer composite hose is provided. The stitched double layer composite hose includes a middle fabric pipe layer, an inner surface composite colloid material layer and an outer surface composite colloid material layer. The structure of the fabric pipe layer is weft-stitched double-layer unit structure. The double-layer unit structure includes an outer layer, an inner layer and stitched wefts. The inner layer includes inner layer warps and inner layer wefts; the outer layer includes outer layer warps and outer layer wefts. The stitched wefts interweave with the outer layer warps and the inner layer warps for conjoining the inner layer and the outer layer together. The fabric pipe layer weaved solves problems of the stitched double layer composite hose in the fabric pipe layer of traditional casing, with such advantages as high flexibility, less weaving point, less loss of yarn strength and less degree of torsion.

A rubber hose includes an inner rubber layer, a first braided layer formed on the inner rubber layer by braiding plural first multiple wound yarn materials in a three-over, three-under pattern formed by bundling plural first yarn materials including a dry vinylon, a second braided layer formed on the first braided layer by braiding plural second multiple wound yarn materials formed by bundling plural second yarn materials, and an outer rubber layer formed on the second braided layer. The young modulus of the first yarn material is not less than 17 GPa and not more than 26 GPa, and a breaking elongation of the first yarn material is not less than 5% and not more than 12%, and an adhesive force between the outer rubber layer and the second braided layer is not less than 10 N/cm and not more than 30 N/cm.

Fuel lines including an inner tube, a reinforcement layer disposed outwardly from the inner tube, and a cover layer disposed outwardly from the reinforcement layer. The cover layer and/or inner tube are formed from compositions including a blend of chlorinated polyethylene (CPE) and chloroprene rubber (CR), where the CPE and CR are blended in a CPE:CR weight ratio of from 20:1 to 1:1. The compositions also include a curing system containing tetrabutylammonium bromide (TBAB), magnesium oxide (MgO), and one of a thiadiazole or thiotriazine. In some aspects, the TBAB is incorporated in an amount of from 0.2 phr to 2.5 phr, the MgO incorporated in an amount of from 5 phr to 20 phr, and the one of a thiadiazole or thiotriazine incorporated in an amount of from 0.5 phr to 5 phr.

A hose assembly includes an inner hose component, a first braid of reinforcement fiber material that extends around the inner hose component, and a second braid of reinforcement fiber material that extends around the first braid. The first braid and the second braid each has a 3 over 3 braid design, and the first braid has a first modulus and the second braid has a second modulus different from the first modulus. The first braid may be a high strength braid having a strength greater than a strength of the second braid, and the second braid may be a high modulus braid having a modulus greater than a modulus of the first braid. The hose assembly optionally may have a third braid with a high angle configuration of the braid segments. The hose assembly may be combined with an enhanced fitting for securing the hose assembly to fluid system equipment.

Described herein are embodiments of a pressure hose having an improved reinforcement layer. In some embodiments, the reinforcement layer of the pressure hose has a reinforcement volumetric ratio (RVR) of greater than or equal to 110%. The reinforcement layer can include a plurality of braided beams, with each beam comprising a plurality of ends. In some embodiments, the plurality of ends within a beam are arranged in a multi-layer orientation. In some embodiments, the number of ends and the end orientation within each beam is identical amongst all beams in the reinforcement layer. The shape, size, and arrangement of the ends within a beam can all be adjusted to increase the surface area to volume ratio and, correspondingly, the RVR of the reinforcement layer.

A multi-layer flexible hose is described comprising a multi-layered structure that has an inner, hollow tube comprising PTFE and an outer layer. The inner PTFE tube is provided so as to extend within the outer layer. The assembly further comprises another sleeve comprising steel braiding that is positioned between the inner PTFE tube and the outer layer. In addition to this, the hose further comprises a coating or layer of intumescent material that is provided between the steel braiding sleeve and the outer layer. A method for forming the hose is also described.