Fuser member and fuser member surface layer
View Patent ↗A fuser member for toner fusing systems and processes. This fuser member has a fuser base and a fusing surface layer, and the fusing surface layer contains a fluoroelastomer and filler particles. The filler particles have a mean particle diameter greater than 5 microns, and a modulus greater than the modulus of the fluoroelastomer at fusing temperatures. The fusing surface layer has at least the minimum proportion by volume of these particles, with at least the minimum mean particle diameter, that will provide the fusing surface layer with an equilibrium surface roughness so that, in fusing toner to substrate, the fuser member generates an image having a gloss number less than 10.
1. A fuser member for a toner fusing system or process comprising:
(a) a base; and
(b) a fusing surface layer comprising:
(i) a fluoroelastomer; and
(ii) filler particles comprising polytetrafluoroethylene filler particles, with a modulus greater than the modulus of the fluoroelastomer at the fusing temperature, and with a mean particle diameter of at least about 50 microns, in at least the minimum proportion by volume of the fusing surface layer, and with at least the minimum mean particle diameter, so that, in fusing toner to substrate, the fuser member generates an image having a gloss number of about 5 or less.
2. The fuser member of claim 1 , wherein the filler particles, with a modulus greater than the modulus of the fluoroelastomer of at the fusing temperature, and with a mean particle diameter of at least about 50 microns, comprise at least the minimum proportion by volume of the fusing surface layer, and have at least the minimum mean particle diameter, which provide the fusing surface layer with an equilibrium surface roughness so that, in fusing toner to substrate, the fuser member, at the equilibrium surface roughness, generates an image having a gloss number of about 5 or less.
3. The fuser member of claim 2 , wherein the filler particles, with a modulus greater than the modulus of the fluoroelastomer at the fusing temperature, comprise from about 10 percent by volume to about 40 percent by volume of the fusing surface layer.
4. The fuser member of claim 2 , wherein the filler particles, with a modulus greater than the modulus of the fluoroelastomer at the fusing temperature, comprise from about 8 percent by volume to about 35 percent by volume of the fusing surface layer, and have a mean particle diameter greater than about 55 microns.
5. The fuser member of claim 1 , wherein the plastic filler particles, with a modulus greater than the modulus of the fluoroelastomer at the fusing temperature, comprise from about 10 percent by volume to about 40 percent by volume of the fusing surface layer.
6. The fuser member of claim 1 , wherein the plastic filler particles, with a modulus greater than the modulus of the fluoroelastomer at the fusing temperature, comprise at least about 12 percent by volume of the fusing surface layer.