Polyethylene composition for the production of peroxide crosslinked polyethylene
View Patent ↗The invention relates to a polyethylene composition for the production of peroxide crosslinked polyethylene and a method for the production thereof. The invention further relates to the use of such a polymer composition and to a peroxide crosslinked polyethylene pipe made from the polyethylene composition.
1. A method for production of a peroxide crosslinked polyethylene comprising soaking a polyethylene composition in the form of pellets in peroxide, the polyethylene composition having a density of 920-973 kg/m 2 and a MFR 2.16 of 0.05-35, the pellets having an average pellet particle size an average pellet particle size of 0.006 cm 3 to 0.020 cm 3 , wherein the polyethylene in the form of pellets is crosslinkable to a degree of crosslinking of at least 70%, as measured according to ASTM D2765-95, and wherein the polyethylene in the form of pellets has a bulk density of about 550 kg/m 3 as measured according to ASTM D1895-89.
2. A method according to claim 1 , further comprising forming a peroxide crosslinked polyethylene pipe from the peroxide crosslinked polyethylene.
3. A method according to claim 2 , wherein forming comprises moulding.
4. A pipe comprising a peroxide crosslinked polyethylene composition, wherein the peroxide crosslinked polyethylene composition is prepared by soaking a polyethylene composition in the form of pellets in peroxide, the polyethylene composition having a density of 920-973 kg/m 2 and a MFR 2.16 of 0.05-35, the pellets having an average pellet particle size an average pellet particle size of 0.006 cm 3 to 0.020 cm 3 , wherein the polyethylene in the form of pellets is crosslinkable to a degree of crosslinking of at least 70%, as measured according to ASTM D2765-95, and wherein the polyethylene in the form of pellets has a bulk density of about 550 kg/m 3 as measured according to ASTM D1895-89.