Method of producing pelletized polyolefin
AssigneeBorealis Technology Oy
InventorsKarin Knudsen, Anne-Marie Fatnes, Magne Due, Olav Hole
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Abstract
Rotational moulded products are prepared by producing a mixture of a polyolefin and optionally at least one additive, extruding this mixture in melt form through orifices in a die, pelletizing the mixture extruded through the orifices to form micropellets having a particle size distribution D(v, 0.5) of 0.1 to 1 mm, and a value of the ratio of D(v, 0.9)−D(v, 0.1) to D(v, 0.5) of no more than 1, drying the micropellets to a residual water content of no more than 1% weight, and if desired packaging the micropellets.
Claims6
A method of producing a rotational moulding micropellet composition, said method comprising:
- producing a mixture of a polyolefin and optionally at least one additive;
- extruding said mixture in melt form through orifices in a die;
- pelletizing the mixture extruded through said orifices to form micropellets having a particle size distribution D(v, 0.5) of 0.1 to 1 mm, and a value of the ratio of D(v, 0.9)−D(v, 0.1) to D(v, 0.5) of no more than 1;
- drying said micropellets to a residual water content of no more than 1% wt;
- and if desired packaging said micropellets.
A method of producing a rotational moulded product comprising:
- (a) producing a mixture of a polyolefin and optionally at least one additive;
- (b) extruding said mixture in melt form through orifices in a die;
- (c) pelletizing the mixture extruded through said orifices to form micropellets having a particle size distribution D(v, 0.5) of 0.1 to 1 mm, and a value of the ratio of D(v, 0.9)−D(v, 0.1) to D(v, 0.5) of no more than 1;
- (d) drying said micropellets to a residual water content of no more than 1% wt;
- (e) filling a mould with the micropellets of step (d);
- (f) placing the filled mould in an oven, and
- (g) rotating the mould in the oven so that the composition melts and coats the inside surface of the mould.
Dependencies are inferred from the claim text.