US 11,981,757 B2
Injection molded medical devices made from a high molecular weight polyethylene
Christina Schmid, Darmstadt (DE); and Rainer Walkenhorst, Melle (DE)
Assigned to CELANESE INTERNATIONAL CORPORATION, Irving, TX (US)
Filed by Celanese International Corporation, Irving, TX (US)
Filed on Mar. 23, 2020, as Appl. No. 16/826,475.
Claims priority of provisional application 62/823,166, filed on Mar. 25, 2019.
Prior Publication US 2020/0308319 A1, Oct. 1, 2020
Int. Cl. C08F 10/02 (2006.01); A61K 47/32 (2006.01); A61K 49/12 (2006.01); A61K 49/22 (2006.01); A61L 27/16 (2006.01); A61L 29/04 (2006.01); A61L 31/04 (2006.01); B29C 45/00 (2006.01); A61B 17/122 (2006.01); A61B 90/98 (2016.01); A61C 8/00 (2006.01); A61F 5/00 (2006.01); A61F 6/14 (2006.01); A61J 15/00 (2006.01); A61M 25/10 (2013.01); A61N 1/36 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01); B29L 31/00 (2006.01)
CPC C08F 10/02 (2013.01) [A61K 47/32 (2013.01); A61K 49/126 (2013.01); A61K 49/22 (2013.01); A61L 27/16 (2013.01); A61L 29/041 (2013.01); A61L 31/048 (2013.01); B29C 45/0001 (2013.01); A61B 17/122 (2013.01); A61B 90/98 (2016.02); A61C 8/0016 (2013.01); A61F 5/005 (2013.01); A61F 6/14 (2013.01); A61J 15/00 (2013.01); A61L 2430/02 (2013.01); A61L 2430/06 (2013.01); A61L 2430/20 (2013.01); A61L 2430/22 (2013.01); A61L 2430/24 (2013.01); A61L 2430/30 (2013.01); A61L 2430/38 (2013.01); A61M 25/10 (2013.01); A61N 1/36038 (2017.08); A61N 1/3605 (2013.01); B29K 2023/0675 (2013.01); B29K 2105/0052 (2013.01); B29L 2031/753 (2013.01); B29L 2031/7532 (2013.01)] 20 Claims
 
1. A medical device comprising:
an injection molded polymer article, the polymer article comprising a high molecular weight polyethylene polymer, the high molecular weight polyethylene polymer contained in the polymer article having a melt flow index of greater than about 0.8 g/10 min and less than 2.5 g/10 min as measured by ISO Test 1133 at 190° C. and at a load of 21.6 kg, the high molecular weight polyethylene contained in the polymer article having a Viscosity Number of greater than about 400 cm3/g and less than about 900 cm3/g when tested according to ISO Test 1628-3, and wherein the high molecular weight polyethylene polymer contained in the polymer article is also a high density polyethylene polymer having a specific gravity of from about 0.94 g/cm3 to about 0.97 g/cm3 when tested according to ISO Test 1183-1, Method A, and wherein the injection molded article contains the high molecular weight polyethylene polymer in an amount greater than about 80% by weight.