US 12,187,877 B2
Extrusion additive manufacturing process for producing polyethylene articles
Shahram Mihan, Bad Soden (DE); Erik Hans Licht, Mainz (DE); Rolf Mülhaupt, Freiburg (DE); Carl Gunther Schirmeister, Denzlingen (DE); and Timo Hees, Freiburg (DE)
Assigned to Basell Polyolefine GmbH, Wesseling (DE); and Albert-Ludwigs-Universität Freiburg, Freiburg (DE)
Appl. No. 17/432,392
Filed by Basell Polyolefine GmbH, Wesseling (DE); and Albert-Ludwigs-Universität Freiburg, Freiburg (DE)
PCT Filed Feb. 12, 2020, PCT No. PCT/EP2020/053521
§ 371(c)(1), (2) Date Aug. 19, 2021,
PCT Pub. No. WO2020/169423, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 19158288 (EP), filed on Feb. 20, 2019.
Prior Publication US 2022/0259416 A1, Aug. 18, 2022
Int. Cl. C08L 23/06 (2006.01); B29C 64/118 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); B29K 23/00 (2006.01)
CPC C08L 23/06 (2013.01) [B29C 64/118 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); B29K 2023/0658 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01)] 8 Claims
 
1. 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).