Cross linked polyethylene5/18/2023 While we offer commonly needed sizes at the ready, we can also cut custom sizes of cross-linked polyethylene foam for any project. The colors blue, light green, light purple, light red, and yellow are available in full sheets only. White and charcoal are available in all sheet sizes since these are common choices. It is also used as packaging and in flotation equipment, with its low moisture permeability and high buoyancy. With its closed-cell density, this strong and reliable foam works well commercially as thermal insulation, construction expansion joints, and industrial gaskets. With a smooth, pleasant feel combined with superior physical and chemical properties, our cross-linked polyethylene 2LB foam is the solution for an array of applications that demand thicker sections of closed-cell material. Pink Anti-Static Pick and Pull Grid FoamĬhemically cross-linked foam is an extremely fine-celled foam, ideal for projects and applications that require thicker foam.We recommend using our quality crimping tools for cutting and crimping cross-linked polyethylene. Important uses include wire and cable insulation, pipe and fittings, face plates, and injection moulded parts. It is also an ideal alternative for applications needing increased chemical and/or resistance to abrasion at an affordable cost. XLPE is manufactured on a much smaller scale than normal high-density polyethylene (HDPE). Applications of Cross-Linkable Polyethylene Peroxide is decomposed by the formation of peroxide radicals abstracting hydrogen atoms from the polymer backbone-the generated radicals on the polymer backbone combine and form crosslinks. Peroxide cross-linked polyethylene – Polyethylene granulates and peroxides (di-dicumyl peroxide or di-tert-butyl peroxide) are combined at low temperatures in the extruder and then crosslinked at high temperatures. Radiation crosslinking is less commonly used due to high capital and maintenance costs than peroxide or silane crosslinking. The procedure is usually conducted in an inert environment to avoid oxidative degradation. Irradiation cross-linked polyethylene – Formed polyethylene articles are subjected to extreme radiation such as gamma rays or electrons that create free radicals which, in turn, cause crosslinking. Extruded articles are then cross-linked by exposure to steam or hot water. Silane grafting is usually done in the molten state in a limited volume of peroxide by reactive extrusion. Silane cross-linked polyethylene – Vinylsilane is grafted into a double bond with polyethylene through a free-radical reaction. It’s density and tensile strength are not or is just partially influenced by crosslinking. Crosslinking also significantly increases crack tolerance, abrasion and environmental tension. The crosslinking transforms polyolefin resins into insoluble and infusible polymers with dramatically increased impact strength and heat distortion but decreased melt index and elongation at release. CROSS-LINKABLE POLYETHYLENE (XLPE) What is Cross-linkable polyethylene?Ĭrosslinked polyethylene (XLPE, XPE, PEX) is a chemically processed high-density polyethylene that can be interlinked with moisture, radiation, catalysts or chemicals.
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