Fixing member for electrophotography, fixing device, electrophotographic image formation device, and addition curing liquid silicone rubber mixture
A fixing member including: a substrate; and an elastic layer arranged on the substrate, wherein the elastic layer contains a silicone rubber and metal silicon powder dispersed in the silicone rubber, wherein the elastic layer has an elastic modulus of 0.10 MPa or more and 0.40 MPa or less, and wherein the metal silicon powder has an aspect ratio of 1.4 or more and 2.5 or less, and a repose angle of 35° or more and 52° or less.
1 . A fixing member comprising:
a substrate; and
an elastic layer arranged on the substrate,
the elastic layer containing a silicone rubber and metal silicon powder dispersed in the silicone rubber,
the elastic layer having an elastic modulus of 0.10 MPa to 0.40 MPa, and
the metal silicon powder having an aspect ratio of 1.4 to 2.5, and having a repose angle of 35° to 52°.
2 . The fixing member according to claim 1 , wherein a content of the metal silicon powder in the elastic layer is 15% to 55% with respect to the elastic layer in terms of volume ratio.
3 . The fixing member according to claim 1 , wherein the elastic layer has a heat capacity per unit volume of less than 1.7 MJ/m 3 ·K.
4 . A fixing apparatus comprising a fixing member,
the fixing member comprising:
a substrate; and
an elastic layer arranged on the substrate, the elastic layer containing a silicone rubber and metal silicon powder dispersed in the silicone rubber,
the elastic layer having an elastic modulus of 0.10 MPa to 0.40 MPa, and
the metal silicon powder having an aspect ratio of 1.4 to 2.5, and having a repose angle of 35° to 52°.
5 . An electrophotographic image forming apparatus comprising the fixing apparatus according to claim 4 .
6 . An addition-curable liquid silicone rubber mixture comprising:
an addition-curable liquid silicone rubber; and
metal silicon powder,
the metal silicon powder having an aspect ratio of 1.4 to 2.5, and having a repose angle of 35 ° to 52°.
7 . The addition-curable liquid silicone rubber mixture according to claim 6 , wherein the addition-curable liquid silicone rubber contains (a) an organopolysiloxane having an unsaturated aliphatic group in a molecule thereof, (b) an organopolysiloxane having active hydrogen bonded to a silicon atom, and (c) a hydrosilylation catalyst.
8 . The fixing member according to claim 1 , wherein the metal silicon powder has undergone a pointed part-rounding treatment.