Fuser roll
First Claim
Patent Images
1. A fuser roll having a metal core shaft and a resilient layer placed around said metal core shaft wherein at least the surface layer part of said resilient layer comprises a fluorosilicone rubber containing 20 to 40 wt. % of fluororesin;
- polytetrafluoroethylene;
wherein fluorosilicone rubber is produced by curing a fluorosilicone rubber composition comprising (A) an organopolysiloxane;
(B) a filler;
(C) polytetrafluoroethylene; and
(D) a curing agent; and
wherein said organopolysiloxane (A) has the formula (1);
##STR14## wherein R1 and R2, which may be the same or different, each represent a monovalent hydrocarbon group having no aliphatic unsaturated bonds and is selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl and cyanoalkyl, R3 is a monovalent aliphatic unsaturated hydrocarbon group, R4 represents a single bond or a bivalent hydrocarbon group having no atiphatic unsaturated groups, Rf represents a fluorine-containing organic group, X represents a hydrogen atom or a group represented by the following general formula (2);
##STR15## where R7, R8 and R9 are each a monovalent hydrocarbon group, k and m are each an integer of zero or more, and 1 is an integer of one or more, provided that 0.5≦
l/(k+l+m)≦
one and wherein said organopolysiloxane (A) contains at least one silicon-bonded alkenyl group and has a viscosity at 25°
C. in the range of 100 to 10,000,000 cSt.
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Accused Products
Abstract
A fuser roll having a metal core shaft has a resilient layer placed around the metal core shaft with at least the surface layer of the resilient layer comprising a fluorosilicone rubber layer containing 5 to 50 wt. % polytetrafluoroethylene. Since this fuser roll is excellent in releasability and silicone oil resistance, the durability is excellent, and the image obtained by a copying machine wherein the roll is used becomes sharp.
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Citations
13 Claims
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1. A fuser roll having a metal core shaft and a resilient layer placed around said metal core shaft wherein at least the surface layer part of said resilient layer comprises a fluorosilicone rubber containing 20 to 40 wt. % of fluororesin;
- polytetrafluoroethylene;
wherein fluorosilicone rubber is produced by curing a fluorosilicone rubber composition comprising (A) an organopolysiloxane;
(B) a filler;
(C) polytetrafluoroethylene; and
(D) a curing agent; and
wherein said organopolysiloxane (A) has the formula (1);
##STR14## wherein R1 and R2, which may be the same or different, each represent a monovalent hydrocarbon group having no aliphatic unsaturated bonds and is selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl and cyanoalkyl, R3 is a monovalent aliphatic unsaturated hydrocarbon group, R4 represents a single bond or a bivalent hydrocarbon group having no atiphatic unsaturated groups, Rf represents a fluorine-containing organic group, X represents a hydrogen atom or a group represented by the following general formula (2);
##STR15## where R7, R8 and R9 are each a monovalent hydrocarbon group, k and m are each an integer of zero or more, and 1 is an integer of one or more, provided that 0.5≦
l/(k+l+m)≦
one and wherein said organopolysiloxane (A) contains at least one silicon-bonded alkenyl group and has a viscosity at 25°
C. in the range of 100 to 10,000,000 cSt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- polytetrafluoroethylene;
Specification