Abstract: A spirally waved synthetic resin conduit has a coupling and a connection structure, and is configured with a small number of components, achieving sufficient water and pressure resistances, excellent sealing properties with no need for any rigid material or high accuracy, reduction in weight and cost, and easy handling with facilitated connection work on site. The spirally waved synthetic resin conduit, provided with a coupling, includes a receiver opening provided at an end of the conduit and connected to another spirally waved synthetic resin conduit. The receiver opening is formed with a foamable resin into a cylindrical shape so as to extend from the end of the spirally waved synthetic resin conduit in an axial direction of the conduit, and an FRP layer is formed by impregnating reinforcing fibers with a resin, at least on an outer peripheral surface of the formed receiver opening at a connection end.

Abstract: Provided are a connection structure for connecting corrugated synthetic resin pipes and a corrugated synthetic resin pipe used in the connection structure. The pipe is lightweight, low cost, and simply structured with a small number of components, having sufficient resistance to water and pressure, and excellent sealing performance without the use of robust material or requiring high precision, and capable of being easily connected and manufactured. A first corrugated synthetic resin pipe 1A is provided at an end 10 with a cylindrical insert end 3 formed by adhering a synthetic resin layer 5 to the outer surface of the end 10 so as to fill at least corrugated recesses 2a. A second corrugated synthetic resin pipe 1B is provided at an end 11 with a socket 4 formed by adhering synthetic resin to the outer surface of the end 11 and cylindrically extending the resin outwardly in the axial direction.

Abstract: The invention provides a lightweight cement panel which achieves light weight, high strength, and durability, is free of degraded strength or deformation due to water absorption or fluctuation of ambient temperature, etc., provides satisfactory processing capabilities including nailing, etc. and can be used as a concrete formwork panel, floor material, wall material, ceiling material, and others of architectural structures. A panel proper 2 is formed by a porous compact 8 produced by filling, curing, and solidifying a mixture prepared by kneading cement, water, reinforcing fibers, and foam obtained by prefoaming a foaming agent in a hermetically sealed cement form block block, contains the reinforcing fibers 7 and foam in a dispersion state in the compact 8, and provides the specific gravity within the range between 0.5 and 1.0.

Abstract: A flexible, pressure-resistant and oil-resistant hose having excellent durability and pressure-resistant properties, light in weight, and low in cost. A flexible, pressure-resistant and oil-resistant hose provided with a soft body section (2) having a substantially flat inner surface, and also with a helical hard core material section (3) provided on the outer surface of or within the soft body section (2) so as to reinforce the soft body section (2), wherein the soft body section (2) consists of an oil-resistant thermoplastic elastomer.

Abstract: A hose having both excellent flexibility and shape retainability and advantageous in construction efficiency and cost efficiency. The hose comprises hard synthetic resin reinforcement material (2) spirally fed and having, on both sides of the top part (2D) thereof in the tube axial direction, receiving surfaces (2a) and (2b) positioned on the radial inner side toward the end part thereof and a soft synthetic resin hose body for covering the spirally fed reinforcement materials (2). The reinforcement materials (2) are spirally fed in the state of the top parts being positioned on the radial outer side thereof, a soft synthetic resin tape material (3) is fed to the fed reinforcement (2), and while covering parts (3A) projected in a generally arc shape to the center of the reinforcement materials (2) by melting the tape material or with an adhesive agent.

Abstract: Provided are a connection structure for connecting corrugated synthetic resin pipes and a corrugated synthetic resin pipe used in the connection structure. The pipe is lightweight, low cost, and simply structured with a small number of components, having sufficient resistance to water and pressure, and excellent sealing performance without the use of robust material or requiring high precision, and capable of being easily connected and manufactured. A first corrugated synthetic resin pipe 1A is provided at an end 10 with a cylindrical insert end 3 formed by adhering a synthetic resin layer 5 to the outer surface of the end 10 so as to fill at least corrugated recesses a. A second corrugated synthetic resin pipe 1B is provided at an end 11 with a socket 4 formed by adhering synthetic resin to the outer surface of the end 11 and cylindrically extending the resin outwardly in the axial direction.

Abstract: Provided is a metal-resin composite pipe provided with a spiral reinforcing strip plate formed of metal in a pipe wall, in which sufficient pressure capacity and rigidity can be maintained even if the pipe wall is made thin and in which flexibility can be improved. The metal-resin composite pipe 1 includes the pipe wall 2 formed in a spiral corrugated shape and a reinforcing strip plate 4 formed of a metal sheet provided in a similar spiral on at least a mountain portion 31 and both side wall portions 32 continuous with the mountain portion 31 of a spiral synthetic resin wall portion 3 constituting the pipe wall 2, the reinforcing strip plate 4 being provided with a single or a plurality of concave portions 41 along a peak portion.

Abstract: The present invention aims to provide a connection structure of metal-resin composite pipes that eliminates the need for arranging thick connection flanges and realizes easy connection work. A diameter-expanded part 4 is formed at an opposing end 10 of a first metal-resin composite pipe 1A by pressurizing and deforming outward a reinforcing convex part 3 including the one end 10 together with a main body 2 positioned inside the reinforcing convex part. A diameter-reduced part 5 is formed at the other end 11 of a second metal-resin composite pipe 1B by pressurizing and deforming inward at least the reinforcing convex part 3 including the other end 11. The diameter-reduced part 5 is inserted into the diameter-expanded part 4. A sealing member 6 is interposed in a gap between an inner surface of the diameter-expanded part 4 and an outer surface of the diameter-reduced part 5.

Abstract: The invention provides a lightweight cement panel which achieves light weight, high strength, and durability, is free of degraded strength or deformation due to water absorption or fluctuation of ambient temperature, etc., provides satisfactory processing capabilities including nailing, etc. and can be used as a concrete formwork panel, floor material, wall material, ceiling material, and others of architectural structures. A panel proper 2 is formed by a porous compact 8 produced by filling, curing, and solidifying a mixture prepared by kneading cement, water, reinforcing fibers, and foam obtained by prefoaming a foaming agent in a hermetically sealed cement form block block, contains the reinforcing fibers 7 and foam in a dispersion state in the compact 8, and provides the specific gravity within the range between 0.5 and 1.0.