Extrusion additive manufacturing process for producing polyethylene articles
AssigneesBasell Polyolefine GmbH, Albert-Ludwigs-Universität Freiburg
InventorsShahram Mihan, Erik Hans Licht, Rolf Mülhaupt, Carl Gunther Schirmeister, Timo Hees
Life of this patent
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Abstract
An extrusion additive manufacturing process including the step of extruding a polyethylene composition having a melt flow index MIE of at least 0.1 g/10 min., the composition made from or containing: A) from 1% to 40% by weight of a polyethylene component having a weight average molar mass Mw, as measured by GPC (Gel Permeation Chromatography), equal to or higher than 1,000,000 g/mol; B) from 1% to 95% by weight of a polyethylene component having a Mw value from 50,000 to 500,000 g/mol; and C) from 1% to 59% by weight of a polyethylene component having a Mw value equal to or lower than 5,000 g/mol.
Claims8
An extrusion additive manufacturing process comprising:
- the step of extruding a polyethylene composition (I) having a melt flow index MIE at 190° C. with a load of 2.16 kg, according to ISO 1133-2:2011, of at least 0.1 g/10 min., wherein the polyethylene composition (I) comprises
- A) from 1% to 40% by weight of a polyethylene component having a weight average molar mass Mw, as measured by GPC (Gel Permeation Chromatography), equal to or higher than 1,000,000 g/mol;
- B) from 1% to 95% by weight of a polyethylene component having a Mw value from 50,000 to 500,000 g/mol;
- and
- C) from 1% to 59% by weight of a polyethylene component having a Mw value equal to or lower than 5,000 g/mol;
- wherein the amounts of components A), B) and C) are referred to the total weight of A)+B)+C).
A filament for use in an extrusion additive manufacturing process, comprising a polyethylene composition (I) having a melt flow index MIE at 190° C. with a load of 2.16 kg, according to ISO 1133-2:2011, of at least 0.1 g/10 min., wherein the polyethylene composition (I) comprises:
- A) from 1% to 40% by weight of a polyethylene component having a weight average molar mass Mw, as measured by GPC (Gel Permeation Chromatography), equal to or higher than 1,000,000 g/mol;
- B) from 1% to 95% by weight of a polyethylene component having a Mw value from 50,000 to 500,000 g/mol;
- and
- C) from 1% to 59% by weight of a polyethylene component having a Mw value equal to or lower than 5,000 g/mol;
- wherein the amounts of components A), B) and C) are referred to the total weight of A)+B)+C).
Dependencies are inferred from the claim text.