This is because PVC resin has poor performance, narrow processing range, and extremely harsh molding conditions. Therefore, for UPVC pipe production enterprises, finding good additives (such as stabilizers, modifiers, lubricants, fillers, etc.), researching the optimal ratio and reasonable process are the prerequisites to ensure the quality of plastic pipe materials.
Plastic pipe problem one: poor tensile strength and toughness. A good UPVC pipe should have a significant yield and elongation curve, while poor plastic pipes often exhibit brittleness, low elongation, and are prone to fracture.
Problem 2 with plastic pipes: Poor impact resistance. According to the GB/T5836.1-92 standard, the drop hammer impact test has been conducted for many years, and it has been found that many products have even ruptured after 10 impacts.
Plastic pipe problem three: Low softening temperature, easy to deform when exposed to heat. In terms of experimental performance, the Vicat softening temperature is relatively low (less than 79). Some manufacturers simply increase the amount of filler in the batching process to increase the softening temperature. This can indeed increase the softening temperature, but it greatly reduces other properties of the pipe, especially impact resistance, tensile strength, and toughness. Therefore, to increase the softening temperature without reducing or reducing other properties, efforts should be made in the selection of additives, raw material ratios, production processes, and production machinery, and should not be taken lightly.
UPVC water supply pipe
UPVC water supply pipes are tested according to the national standard GB/T10002.1-1996, and their hydraulic inspection performance standard values require high standards, which puts high demands on enterprises producing UPVC water supply pipes. Eccentricity is one of the common problems with plastic pipes, which can lead to uneven wall thickness in the produced plastic pipes. This not only causes waste of raw materials, but also makes it difficult for their hydraulic test performance to meet the requirement of a ring stress of 42MPa, which has a significant impact on the operation of plastic pipe production lines. Therefore, this requires production enterprises not only to control the material ratio, but also to install online detection instruments where conditions permit, which can adjust the size deviation of plastic pipes.