Patent ID: 6426026
Filing Date: 2002-07-30
Classification: B29B,B29C,B29K

Abstract:
A method of pelletizing polyolefin polymers having a melt flow of above 100 dg/min comprising:feeding a polyolefin granular or pelleted polymer into a melting/mixing mechanism to provide a molten polymer material; feeding the molten polymer material through a die to form a plurality of molten polymer strands in at least one horizontal array; cooling the plurality of molten polymer strands by feeding them through a water trough declined from the die with respect to the direction of the at least one horizontal array at an angle of 1 to 30 degrees from the at least one array and spraying the plurality of molten polymer strands with cool liquid a plurality of times in such a manner that the sprayed cool liquid creates turbulent flow and disturbs a thin film of hot water and/or steam that forms around each molten polymer strand as it is cooled without imparting undesirable axial acceleration on the strand to form cooled polymer strands; and pelletizing the cooled polymer strands in a cutting device to form polymer pellets.