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Reinforced polypropylene tubes prepared in stages: first, by extrusion produce a homogeneous polypropylene tube, then in the process of continuous hard outer surface of the pipe tightly covered with solid or perforated aluminum tape lap or butt. Tape edge welds by ultrasound. The resulting tubular structure is extruded again: on top of an aluminum shell cause a new layer of polypropylene. Thanks to the device inside the thermoplastic pipe annular shell of metal or other inert polymer material (the reinforcement tubes) reduced the temperature elongation of the thermoplastic pipe. Coefficient of linear thermal expansion of reinforced polypropylene pipe equals 0.03 mm / (m K), which is much smaller than the corresponding coefficient for the ordinary polypropylene pipes.
Reinforced hull in cross-section tube is biased to its outer surface. This position of the shell due to the flare of welding technology in which the outer diameter of the pipe at normal temperature should be around to answer the internal diameter of the fitting. Therefore, the thickness of the aluminum shell and the outer polymer layer of 2-3 mm.
Aluminum perforated reinforcing shell polypropylene pipe has some perforations - small holes. In the process of extruding polypropylene tubes binder flow into the hole, thus providing a traction of the polymer and metal.
Reinforcement of polypropylene pipes except the temperature stabilization performs another function - the creation of diffusion barrier against the penetration of oxygen transported in the environment. In addition to the metal-reinforced polypropylene tubes of design, reinforced with synthetic fillers. In terms of such pipes are not inferior pipes, reinforced with aluminum, yet they are lighter, their capacity is 20% higher. The outer diameter of the pipe corresponds to the normal range, because it does not need pre-cleaning of the aluminum hull before bonding.
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Pipe and valves PPR .
A large assortment of all kinds of valves, fittings, check valves, filter
Pipe and valves PPR .
A large assortment of all kinds of valves, pipes, fittings, check valves,