Patent · US Expired

Method of producing pelletized polyolefin

US6894109B1 · kind B1 · utility

5Cited by

21References

9Claims

0Family size

Assignee

Borealis Technology Oy · FI

Inventors

Karin Knudsen · Porsgrunn, NO
Anne Fatnes · Stathelle, NO
Magne Due · Stathelle, NO
Olav Hole · Stathelle, NO

Key dates

Filing date	Apr 1, 2003
Grant date	May 17, 2005
Priority date	—
Expiry date	Aug 1, 2023

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2023/12
WIPO fieldOther special machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.