CPC F16L 11/12 (2013.01) [B29C 48/21 (2019.02); B32B 1/00 (2013.01); B32B 1/08 (2013.01); B32B 5/024 (2013.01); B32B 25/08 (2013.01); B32B 25/10 (2013.01); B32B 25/14 (2013.01); C08J 5/046 (2013.01); C08K 3/22 (2013.01); C08K 3/346 (2013.01); C08K 3/36 (2013.01); C08K 5/12 (2013.01); C08L 9/00 (2013.01); C08L 23/16 (2013.01); F16L 11/085 (2013.01); B29C 48/10 (2019.02); B29K 2023/06 (2013.01); B29K 2023/16 (2013.01); B29K 2105/0032 (2013.01); B29K 2105/0038 (2013.01); B29K 2105/0044 (2013.01); B29K 2509/08 (2013.01); B29K 2511/00 (2013.01); B29K 2995/0007 (2013.01); B29K 2995/007 (2013.01); B29K 2995/0077 (2013.01); B32B 2307/206 (2013.01); B32B 2307/536 (2013.01); B32B 2307/54 (2013.01); C08K 2003/2241 (2013.01); C08L 2205/025 (2013.01); Y10T 428/139 (2015.01); Y10T 428/1397 (2015.01)] | 17 Claims |
1. A method of making a non-conductive rubber hose comprising
blending a first composition comprising an ethylene propylene diene monomer (EPDM) polymer, wherein the EPDM polymer comprises low ethylene EPDM polymer having no more than 60 wt % ethylene by ASTM 3900 and high ethylene EPDM polymer having at least 69 wt % ethylene by ASTM 3900, in a weight ratio of about 10:1 to about 1:1, an electrically-resistive filler, and a silane-treated filler;
extruding the first composition onto a mandrel to form an EPDM rubber tube layer;
applying a textile braid over the EPDM tube layer to form reinforcement layer;
extruding a second composition over the reinforcement layer to form a cover layer in a green hose;
vulcanizing the green hose; and
expelling the hose from the mandrel.
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