Fuser assembly with donor roller having reduced release agent swell
OwnerJiann H. Chen, Stephen V. Davis +1inventors
InventorsJiann H. Chen, Stephen V. Davis, Robert A. Lancaster
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Abstract
In a fusing assembly for fixing toner to a receiver and having a fuser roller and a pressure roller forming a fixing nip, a metering roller, a polymeric release agent is applied to the metering roller and a release agent donor roller for receiving polymeric release agent from the metering roller and applying it to the surface of the fusing roller, the release agent donor roller comprising an outer layer including a silicone material selected so that its swelling in 1000 cts poly(dimethylsiloxane) is less than 6% by weight.
Claims9
A fusing assembly for fixing toner to a receiver comprising a fuser roller and a pressure roller forming a fixing nip, a metering roller, means for applying a polymeric release agent to the metering roller and a release agent donor roller for receiving polymeric release agent from the metering roller and applying it to the surface of the fusing roller, the release agent donor roller comprising an outer layer including a silicone material selected so that its swelling in 1000 cSt. poly(dimethylsiloxane) is less than 6% by weight, such silicone material including:
- (a) a crosslinked poly(dialkylsiloxane) incorporating an oxide, wherein the crosslinked poly(dialkylsiloxane) has a molecular weight-average before crosslinking of about 1,000 to 90,000;
- (b) one or more crosslinked poly(siloxane) selected from the group consisting of poly(diarylsiloxane), poly(arylalkylsiloxanes) or mixtures thereof wherein the disrylsiloxane) or poly(arylalkylsiloxane) has a weight-average molecular weight before crosslinking of about 1,000 to 90,000;
- (c) a silicone T-resin;
- (d) at least one silane crosslinking agents;
- and
- (e) wherein the weight-average molecular weight of the mixture of poly(dialkylsiloxane) and poly(siloxane) is about 5,000 to 80,000.
A fusing assembly for fixing toner to a receiver comprising a fuser roller and a pressure roller forming a fixing nip, a metering roller, means for applying a polymeric release agent to the metering roller and a release agent donor roller for receiving polymeric release agent from the metering roller and applying it to the surface of the fusing roller, the release agent donor roller comprising an outer layer including a silicone material selected so that its swelling in 1000 cSt. poly(dimethylsiloxane) is less than 6% by weight, such silicone material including:
- (a) a crosslinked poly(dialkylsiloxane) incorporating an oxide;
- (b) one or more crosslinked poly(siloxane) selected from the group consisting of poly(diarylsiloxanes), poly(arylalkylsiloxanes) or mixtures thereof;
- (c) a silicone T-resin present in an amount from 5 to 26 parts per 100 parts crosslinkable poly(dialkylsiloxane);
- and
- (d) at least one silane crosslinking agent present in an amount less than 40 parts per 100 parts crosslinkable poly(dialkylsiloxane).
A fusing assembly for fixing toner to a receiver comprising a fuser roller and a pressure roller forming a fixing nip, a metering roller, means for applying a polymeric release agent to the metering roller and a release agent donor roller for receiving polymeric release agent from the metering roller and applying it to the surface of the fusing roller, the release agent donor roller comprising an outer layer including a silicone material selected so that its swelling in 1000 cSt. poly(dimethylsiloxane) is less than 6% by weight, such silicone material including:
- (a) a crosslinked poly(dialkylsiloxane) incorporating an oxide, wherein the crosslinked poly(dialkylsiloxane) has a molecular weight-average before crosslinking of about 1,000 to 90,000 wherein the crosslinked poly(dialkylsiloxane) incorporating an oxide, includes an (α,ω-hydroxy-) poly(dialkylsiloxane) with the repeat unit structure:
- where n is an integer such that the weight average molecular weight is from 1,000 to 90,000, R1 and R2 are independently selected alkyl groups including methyl, ethyl, propyl, butyl, pentyl, or hexyl, and a polyethylsilicate crosslinking agent;
- and an oxide filler containing particles of aluminum oxide or iron oxide;
- (b) one or more crosslinked poly(siloxane) selected from the group consisting of poly(diarylsiloxane), poly(arylalkylsiloxanes) or mixtures thereof wherein the disrylsiloxane) or poly(arylalkylsiloxane) has a weight-average molecular weight before crosslinking of about 1,000 to 90,000;
- (c) a silicone T-resin;
- (d) at least one silane crosslinking agents;
- (e) wherein the weight-average molecular weight of the mixture of poly(dialkylsiloxane) and poly(siloxane) is about 5,000 to 80,000;
- and
- (f) wherein the polymeric release agent has a functional group that include hydride, amino, or mercapto.
Dependencies are inferred from the claim text.