The production line produces pipes in batches. However, due to the huge cost of introducing production lines and technologies, some domestic enterprises and institutions of higher learning have begun to study PP-R pipe forming equipment and production technology, and have made substantial progress.
The Institute of Plastics Engineering Technology of Qingdao Institute of Chemical Technology uses its own advantages in process design, structural design and mechatronics to design and develop a successful PP-R pipe co-extrusion production equipment, which can produce 16 75 various pipes. On February 27, 2000, it passed the appraisal organized by the Shandong Provincial Science and Technology Commission and successfully developed the PP-R pipe fitting manufacturing technology. PP-R pipe has broad application prospects due to its good comprehensive performance.
At present, relevant state departments and local governments have successively issued relevant policies to phase out galvanized pipes and cast iron pipes within a time limit, and vigorously promote the application of plastic pipes such as PP-R pipes, which provides a good policy environment for the popularization of PP-R pipes. The Shanghai Engineering Construction Standardization Office has formulated technical regulations and application standards for PP-R pipeline engineering for building water supply. It is believed that with the localization of PP-R raw materials and molding equipment and technology, it will promote the upgrading of China's building materials.
Plastic bolts and plastic nails Bolts, nuts and nails made of plastic appear on the Japanese market. The plastic bolts and nuts are made of glass fiber reinforced epoxy resin and are made of hydraulic machine under high temperature and high pressure. They have high fracture strength and fatigue strength, and the weight is only one quarter of the metal products of the same specifications.
Plastic nails are magnetically resistant, rust-proof, and planable. Both cork and hardwood can be nailed.
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