Can polyethylene be cross linked?
Andrew Henderson
Updated on March 07, 2026
Can polyethylene be cross linked?
Cross-linked polyethylene (XLPE) is a thermosetting resin with three types of cross-linking: peroxide cross-linking, radiation cross-linking, and silane cross-linking.
What is cross linked polyethylene wire?
Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links. It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, and insulation for high tension (high voltage) electrical cables.
What type of insulation is XLPE?
Cross-linked Polyethylene
Cross-linked Polyethylene, also referred to as XLPE, is a form of insulation that is created through both heat and high pressure. One method of creating XLPE insulation is by irradiating the compound.
What is the difference between XLP and XLPE?
CROSS-LINKED POLYETHYLENE(XLP) is a material which has greater resistance to environmental stress cracking, cut-through, ozone, solvents and soldering than either low or high density polyethylene. Sometimes designated as XLPE. Can be cross-linked either chemically or irradiated.
What is the difference between polyethylene and cross-linked polyethylene?
Both linear polyethylene and XLPE tanks are made with heated resins to create a cured plastic. However, the differences in their production create very different polyethylenes with very different structural strength. Cross-linking is simply the formation of bonds between the polymer chains.
What plastics are cross-linked?
Almost all the hard and rigid plastics we use are cross-linked. These include Bakelite, which is used in many electric plugs and sockets, melamine, which is used in plastic crockery, and epoxy resin glues. Figure 8.26. 1: A cross-linked polymer.
Why do we use XLPE?
What are the benefits of XLPE? XLPE insulation performs at both high and low temperatures. Due to its structure, XLPE is extremely resistant to abrasion and other wear and tear. It also boasts resistance to high voltage electricity, chemicals, and other hazardous materials.
What is the difference between XHHW and Thhn?
THHN/THWN-2 is a thermoplastic product, while XHHW-2 features thermoset insulation….HOW TO KNOW THE DIFFERENCE.
| THHN/THWN-2: | XHHW-2: |
|---|---|
| T = Thermoplastic | X = Cross-Linked Polyethylene (XLPE) |
| HH = High Heat Resistant | HH = High Heat Resistant |
| W = Water Resistant | W = Water Resistant |
| N = Nylon Jacket | (Not Required) |
Which is better XLPE or PVC?
The main difference between the two is that XLPE can be used for both high and low tension applications. Its structure provides great resistance to abrasion, stress, and other wear and tear. PVC insulation cannot withstand as much pressure, meaning it is only suitable for low tension applications.
How is cross linked polyethylene made?
Cross-linked polyethylene is high-density polyethylene that is manufactured by adding a catalyst to the thermoplastic resin, which turns it into a thermoset. The catalyst causes covalent bonds that link the molecules together. Picture a chain-link fence where the metal links are actually bonded or welded together.
What’s the difference between XLPE and PVC SWA?
The main difference between the two is that XLPE can be used for both high-and-low tension applications. Its structure provides great resistance to abrasion, stress, and other wear and tear. PVC insulation cannot withstand as much pressure, meaning it is only suitable for low tension applications.
What is PVC and XLPE?
PVC stands for polyvinyl chloride insulation. XLPE insulation tends to last longer than PVC insulation. Since XLPE doesn’t contain chloride, it is more environmentally friendly. XLPE insulation can withstand higher temperatures. Cross-linked polyethylene features more moisture resistance.
What is cross linked polyethylene used for?
Cross-linked polyethylene. Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links. It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, and insulation for high tension (high voltage) electrical cables.
How do you remove cross-links from polyethylene?
From peroxide cross-linked polyethylene, the cross-links are selectively removed by using supercritical water without severe decomposition of the backbone chains [27]. For silane cross-linked polyethylene, treatment in subcritical water for temperatures T > 340 °C leads to zero cross-linking, with a reduction of the molecular weight.
What is the difference between linear and cross-linked polyethylene tanks?
Linear polyethylene is cheaper, and safe for storage of benign and non-corrosive chemicals. For certain chemical storage applications, these tanks do the job nicely. Cross-linked polyethylene is high-density polyethylene that is manufactured by adding a catalyst to the thermoplastic resin, which turns it into a thermoset.
How can you tell if polyethylene is cross linked or thermoplastic?
If there is no identification symbol, the best way to determine if the polyethylene is cross-linked or thermoplastic, is to try to melt it. Thermoplastic polyethylene will melt easily, but cross-linked polyethylene will not melt; t may turn brown or become soft and flexible, but it will not melt, as can be seen here.
