Crosslinked Polyethylene Resin

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  • High-density crosslinked polyethylene or XLPE is a Thermoset resin that is specifically designed for critical applications like chemical storage.

  • Crosslinking polyethylene changes the polymer from a thermoplastic to a thermoelastic polymer.

  • Once a material is fully crosslinked, polyethylene tends not to melt but merely to become more flexible at higher temperatures.

  • Properties of PEX are improved heat resistance, chemical and oxidation resistance, low temperature strength and long term strength at elevated temperatures.

  • A flexible, durable, reliable plastic piping product for use in plumbing, residential fire safety and radiant heating & cooling systems.

  • Types of Polyethylenes which are crosslinked such as Low density polyethylene, high density polyethylene and polyolefinic Elastomer.

  • There are two main types of polyethylene cross link: PEX-a and PEX-b.PEX-a or Engel method material is also known as hot cross linking as the reaction occurs when the polymer is molten. PEX-b or moisture cure method material uses silicon and oxygen atoms to form bridges between the polymer chains.

  • Crosslinking of polyethylene takes place in four stages: initiation, propagation, branching and termination.

  • Polyethylene can be crosslinked by silane method used for various interesting applications.

  • Finds applications in packaging and electrical insulation & rotomoulding applications.

  • Widely used in building services pipe work systems, domestic water piping and insulation for high tension electrical cables. It is also used for natural gas and offshore oil applications, chemical & transportation of sewage and slurries.
     

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