Processes for cleaning melt processing equipment
AssigneeTicona LLC
InventorsRichard MOORE, Cole FOOR
Life of this patent
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Abstract
A process for cleaning melt processing equipment used to compound, mold and/or extrude a polymeric resin includes supplying to the melt processing equipment a particulate purge material comprising polyethylene having a viscosity number from 300 to 3,500 ml/g and an average particle size, d50, from 50 to 1000 micron, heating the melt processing equipment to a temperature sufficient to allow the purge material to be extruded through the equipment, and running the equipment to extrude the purge material while cleaning the melt processing equipment.
Claims20
A process for cleaning melt processing equipment used to compound, mold and/or extrude a polymeric resin, comprising:
- supplying to the melt processing equipment a particulate purge material comprising at least 75 wt % of polyethylene having a viscosity number from 300 to 3,500 ml/g and an average particle size, d50, from 50 to 1000 micron, heating the melt processing equipment to a temperature sufficient to allow the purge material to be extruded through the equipment, and running the equipment to extrude the purge material while cleaning the melt processing equipment.
A process for cleaning melt processing equipment used to compound, mold and/or extrude a polymeric resin, comprising supplying to the melt processing equipment a particulate purge material comprising at least 5 wt % of polyethylene having a viscosity number from 300 to 3,500 ml/g and an average particle size, d50, from 50 to 1000 micron and up to 95 wt % of at least one extrudable, thermoplastic further polymeric material, heating the melt processing equipment to a temperature sufficient to allow the purge material to be extruded through the equipment, and running the equipment to extrude the purge material while cleaning the melt processing equipment.
Dependencies are inferred from the claim text.