Plastic pipe problems

July 27, 2021

UPVC drainage pipe UPVC drainage pipe in China's plastic pipe industry accounted for about 50% of production, is widely used in China, applied earlier, the user is familiar with the plastic pipe. However, in the inspection we found that it is the UPVC drain that has many problems. This is because the performance of PVC resin is poor, the processing range is narrow, and the molding conditions are extremely engraved. Therefore, for UPVC pipe manufacturers, they are looking for excellent additives (such as stabilizers, modifiers, lubricants, fillers, etc.), Studying the superior ratio and reasonable technology is the premise of ensuring the quality of plastic pipe. Now we introduce some common problems of plastic pipe. Plastic pipe problem 1: poor tensile strength and toughness. A good UPVC pipe should have a pronounced yield strength curve and a high elongation, while poor plastic pipes often exhibit brittleness, low elongation and easy to break. Plastic pipe problem 2: poor impact resistance. According to the GB/T 5836.1-92 standard, the drop hammer impact test was tested. After many years of tests, it was found that the one-pass rate was only less than 50%, and many products even had 10 shocks and all cracked. Plastic pipe problem three: softening temperature is low, easy to heat deformation. Performance in the test performance, that is, Vicat softening temperature is lower (less than 79), some manufacturers to increase the softening temperature, simply increase the amount of filler in the dosing, this can indeed increase the softening temperature, but it makes other properties of the pipe In particular, impact resistance, tensile strength, and toughness are greatly reduced. Therefore, in order to increase the softening temperature without reducing or rarely reducing other properties, it is necessary to work on the selection of additives, raw material ratios, production processes, and production machinery. Do not treat it lightly. UPVC water supply pipe UPVC water supply pipe, in accordance with the national standard GB/T10002.1-1996 testing, the higher the standard value of the hydraulic inspection performance, which puts high demands on the production of UPVC water supply pipe companies. Eccentricity problem is one of the common plastic pipe problems, which will lead to a greater degree of uneven wall thickness of the produced plastic pipe, which not only results in the waste of raw materials, but also makes it difficult for the hydraulic test performance to meet the requirements of the ring stress 42MPa. Plastic pipe production line operation has a great impact. Therefore, this requires the manufacturer not only to match the good materials, and the qualified enterprises should install on-line inspection instruments to adjust the dimensional deviation of the plastic pipe at any time.