PEX pipe, also known as cross-linked polyethylene pipe, is a new type of pipe with excellent performance. It uses high-density polyethylene (HDPE) as the main raw material, and uses physical or chemical methods to transform the linear molecular structure of polyethylene into a three-dimensional network structure, thus greatly improving the performance of the pipe. PEX pipes are widely used in construction, industry, food and other fields due to their excellent heat resistance, creep resistance and stress cracking resistance.factory 30+ years manufacture experience support color /size customization support free sample.Welcome to consult for catalog and .
2. Manufacturing process of PEX pipes
The manufacturing of PEX pipes first requires the preparation of high-quality raw materials. The main raw material is HDPE, and initiators, cross-linking agents, catalysts and other additives are also added, as well as modifiers added according to specific needs. The precise ratio of these raw materials and additives is the key to ensuring the performance of PEX pipes.
After the raw materials are pre-treated, they enter the plasticizing and extruding stage. Under the action of the extruder, the raw materials undergo processes such as melting and homogenization, and gradually transform into highly elastic and viscous fluids, preparing for subsequent molding.
Cross-linking treatment
The cross-linking treatment of PEX pipes is a core link in the manufacturing process. The performance of PEX pipes will vary depending on the cross-linking method used. Common cross-linking methods include Engel method (peroxide method), silane method, radiation method, etc. Among them, PEX pipes manufactured by silane method and radiation method have higher heat resistance, creep resistance and stress cracking resistance because of their three-dimensional structure of macromolecules.
3. Development Trend of PEX Pipe Manufacturing Technology