due to the construction strength and process complexity of flexible connection of pressure ring of grooved HDPE ultra-quiet drainage pipe, such as PVC drainage pipe connection, plastic drainage pipe is inserted in the sleeve room and the subtitle can be bonded. Although the connection methods are different, the basic construction technology is the same. The labor cost for installation is basically the same. Therefore, indoor UPVC drainage quota bonding can generally be applied. Of course, the corresponding fittings with fixed installation content must be replaced by grooved HDPE ultra-quiet drainage pipes, that is, they need to be re-priced.
PP (polypropylene) can be modified by filling, reinforcing, * * * mixing, * * * poly and cross-linking. Adding fillers such as calcium carbonate, talcum powder and inorganic minerals can improve the rigidity, hardness, heat resistance and dimensional stability of PP; Adding glass fiber, asbestos fiber, mica and glass beads can improve tensile strength, creep resistance and low temperature impact resistance; Adding thermoplastic elastomer TPE/TPR or rubber can improve impact performance, transparency and so on. It is widely used, even Australian banknotes are made of PP. Banknotes are made of biaxially stretched PP(BOPP), so its durability improves PP's unusual ability to resist chemical solvents, acids and alkalis.