Production formula for solving easy precipitation in rigid polyvinyl chloride pipe production and pipe preparation process thereof

Abstract

The invention provides a production formula for solving easy precipitation in rigid polyvinyl chloride pipe production and a pipe preparation process thereof. The production formula comprises the following components in parts by weight: 100 parts of PVC resin, 5-15 parts of a filler, 3-8 parts of a processing aid, 2-8 parts of an impact modifier, 3-5 parts of a calcium-zinc stabilizer, 2-5 parts of a coloring agent, 0.5-1 part of stearic acid, 0.5-1 part of polyethylene wax and 0.02-0.05 part of an ultraviolet light absorber. By using the formula of the rigid polyvinyl chloride pipe, the precipitation phenomenon of pipes in the processing process can be remarkably solved, and the problem that processing is difficult by adopting a conventional or common calcium-zinc stabilizer formula is solved.

Description

technical field [0001] The invention belongs to the technical field of plastic pipe production, processing and manufacturing, and in particular relates to a production formula for improving the easy precipitation of hard polyvinyl chloride pipe production and a pipe preparation process thereof. Background technique [0002] Rigid polyvinyl chloride (PVC-U) pipes were produced with a lead salt formula system in the early days, but lead is a heavy metal element, and long-term use in contact with water may cause migration risks or hidden dangers, which will affect people's physical and mental health, and it does not comply with national environmental protection policies. In recent years, as the country has introduced restrictions on lead and banning lead on hard polyvinyl chloride plastic pipes, the production of PVC pipes has transitioned to the production of environmentally friendly stabilizers, the most important of which is calcium-zinc stabilizers, which are environmentally...

AI Technical Summary

Problems solved by technology

However, the use of calcium-zinc formula stabilizers also has a disadvantage, that is, there is precipitation during the production process, including the precipitation of dies and sizing sleeves. The mechanism is mainly due to the low compatibility of calcium-zinc stabilizers and PVC resins. When thermal degradation, temperature and melting pressure changes with inorganic solid components, small molecular components transfer to the surface of the melt and attach to the processing equipment, forming deposits on the metal surface of the mold, so that the hard PVC pipes appear inside and outside. Internal and external quality defects such as pits, pits or lines, patterns on the surface also make it difficult to guarantee the quality

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