Patent ID: 7635549

Claim:
A toner, comprising: a binder resin; a colorant; and a release agent in an amount from 1 to 10 parts by weight per 100 parts by weight of the binder resin, wherein the release agent has a melting point of from 60 to 100° C. and includes at least one wax selected from the group consisting of a fatty acid ester, a low-molecular-weight polyethylene, and a carnauba wax, wherein the toner satisfies the following relationships (1) and (2): 1.0≦ FT 120/ FT 160≦1.5 (1) wherein FT120 is a maximum tensile strength (N) of 1.5 or less, measured when 10 g/m 2 of an unfixed toner on an aluminum plate comprising a surface coated with TEFLON PFA is vertically separated from the surface of said aluminum plate at a constant speed after being pressed thereon at a pressure of 100 kPa, wherein said aluminum plate has a width of 50 mm, a depth of 60 mm, a thickness of 2 mm and a temperature of 120° C., and FT160 is a maximum tensile strength (N), measured when 10 g/m 2 of the unfixed toner on an aluminum plate comprising a surface coated with TEFLON PFA is vertically separated from the surface of said aluminum plate at a constant speed after being pressed thereon at a pressure of 100 kPa, wherein said aluminum plate has a width of 50 mm, a depth of 60 mm, a thickness of 2 mm and a temperature of 160° C.; 1.0≦ FP 100/ FP 200≦1.5 (2) wherein FP100=FT160, and FP200 is a maximum tensile strength (N) measured when 10 g/m 2 of the unfixed toner on an aluminum plate comprising a surface coated with TEFLON PFA is vertically separated from the surface of said aluminum plate at a constant speed after being pressed thereon at a pressure of 200 kPa, wherein said aluminum plate has a width of 50 mm, a depth of 60 mm, a thickness of 2 mm and a temperature of 160° C.