First, what is the PP-R » PP-R called the three types of polypropylene, used by the PP-R out of a pipe, injection into the tube. Europe is the early 1990s, the development and application of new plastic pipe products. PP-R is the end of the 1980s, the use of gas copolymerization of the PE of around 5% of the PP in the chain of random elements uniform polymerization (-R) and a new generation of pipeline material. It has good resistance to impact and long-term creep properties. Second, PP-R and PP-C What is the relationship between » The previous period, the domestic market on a PP-C pipe, tube, the installation method consistent with the PP-R. Many people in the dark on PP-R and PP-C What is the difference, resulting in a lot of misunderstanding and confusion. International standards, polypropylene hot and cold water pipes at PP-H, PP-B, PP-R are not PP-C. On the market PP-C is actually the PP-B of its raw materials is a block of special PP-type pipe. PP-B is of a hot and cold water pipes, the price is cheaper, its heat and pressure performance and the gap between the PP-R great. For example: the use of conditions grade 2, 0.6 MPadn25mm design pressure pipe, PP-R wall thickness of 3.5 mm, PP-B (PP-C) pipe wall thickness to 5.1 mm; design pressure of 0.8 MPadn25mm, PP-R pipe wall thickness 4.2 mm, and PP-B (PP-C) can not be used. Because the requirements of a thick wall thickness. Market size and structure of PP-R line of the PP-C, lower than its terms can not be confused with the use of PP-R, not in determining conditions of use, to replace PP-C of the PP-R. Terms of Use 2 that the design temperature 70 ℃, heating water. 3, PP-R What are the characteristics of the » PP-R pipe in addition to general plastic pipe light weight, corrosion-resistant, non-scaling, long life and other characteristics, but also has the following main features: 1, non-toxic, and public health. PP-R only the raw materials of carbon and hydrogen elements, not harmful toxic elements exist, and public health can *, not only for hot and cold water pipes, can also be used to clean drinking water systems. 2, energy-saving insulation. PP-R of the thermal conductivity of 0.21 w / mk, the pipe was only 1 / 200. 3, better heat resistance. PP-R of the Vicat softening point 131.5 ℃. The maximum temperature up to 95 ℃, to meet the water supply and drainage construction norms in the use of hot water system requirements. 4, long service life. PP-R in the working temperature of 70 ℃, work pressure (PN) 1.OMPa conditions, the service life of up to 50 or more at room temperature (20 ℃) service life of 100 years or more. 5, ease of installation, can connect *. PP-R has a good performance welding, pipe, tube and hot-melt can be fused connection, ease of installation, the joints can *, connecting its parts is greater than the strength of the pipe itself strength. 6, use of recyclable materials. PP-R as clean waste, broken after the recovery of the pipe, tube production. Recovery expected amount of not more than 10% of the total, do not affect product quality. 4, PP-R main purpose of which »
Polyamide commonly known as nylon (Nylon), the title of Polyamide (referred to PA), is linked on the main elements contained repeat amide group - [NHCO] - collectively, the thermoplastic resin. Including aliphatic PA, fat - aromatic PA and aromatic PA. Among them, aliphatic PA varieties, production, application of broad, named by the synthesis of single specific number of carbon atoms determined.
Nylon is the main varieties of nylon 6 and nylon 66, the absolute dominant position, followed by nylon 11, nylon 12, nylon 610, nylon 612, as well as nylon 1010, nylon 46, nylon 7, 9 nylon, nylon 13, New There are nylon 6 I, nylon 9 T and special nylon MXD6 (barrier resin), nylon modified the number of many varieties, such as enhancement of nylon, nylon casting monomer (MC nylon), reaction injection molding (RIM) nylon, aromatic nylon , Transparent nylon, high-impact (super-tough) nylon, electroplating nylon, conductive nylon, fire-retardant nylon, nylon and other polymer blends and alloys, to meet special requirements of different, widely used for metal, wood and other traditional materials substitutes, As a variety of structural materials.
Nylon is the most important engineering plastics, engineering plastics production in five of the top GM.
Brass is composed of copper and zinc alloys. If only by copper, zinc composition of the brass called on ordinary brass. If it is from more than two kinds of elements of a variety of special alloy called on the brass. If the lead, tin, manganese, nickel, lead, iron, copper alloy composed of silicon. Brass have a stronger wear resistance. Special brass called special brass, its high strength, hardness, corrosion-resistant chemical. Cutting is also available in the mechanical properties are more prominent. From the brass pull into a seamless brass, soft, strong wear resistance. Brass seamless tube can be used for heat exchangers and condensers, low temperature pipeline, transportation of the submarine. Manufacturing sheet metal, of the material, bar, pipe, spare parts, such as casting. Copper 62% to 68%, strong plastic, creating pressure equipment. Zhejiang Boshite Machinery Co., Ltd.is specialized in the production of Nylon tube, PP-R Pipe And PP-R Pipe Fittings and pipe fittings.