Electrophotographic toner and image-forming system

An electrophotographic toner comprising:

• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• an alpha olefin having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%, and
• wherein a ratio of the alpha olefin to the polyethylene wax is in a range of from 1:10 to 2:1.

An electrophotographic toner, comprising:

• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a paraffin wax having a number-average molecular weight of 300 to 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 10 mPa·s at 140° C. and a crystallinity of lower than 90%, and
• wherein a ratio of the paraffin wax to the polyethylene wax is in a range of from 1:10 to 2:1.

An image-forming system, comprising:

• an electrostatic charge holding member;
• an electrophotographic toner;
• a developing unit that obtains a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge holding member with the electrophotographic toner;
• a transfer unit that transfers a visualized toner image onto a recording medium;
• and
• a fixing unit that fixes the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a hydrocarbon wax having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%, and
• wherein a ratio of the hydrocarbon wax to the polyethylene wax is in a range of from 1:10 to 2:1.

An image-forming system, comprising:

• an electrostatic charge holding member;
• an electrophotographic toner;
• a developing unit that obtains a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge holding member with the electrophotographic toner;
• a transfer unit that transfers a visualized toner image onto a recording medium;
• and
• a fixing unit that fixes the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• an alpha olefin having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%, and
• wherein a ratio of the alpha olefin to the polyethylene wax is in a range of from 1:10 to 2:1.

An image-forming system, comprising:

• an electrostatic charge holding member;
• an electrophotographic toner;
• a developing unit that obtains a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge holding member with the electrophotographic toner;
• a transfer unit that transfers a visualized toner image onto a recording medium;
• and
• a fixing unit that fixes the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a paraffin wax having a number-average molecular weight of 300 to 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 10 mPa·s at 140° C. and a crystallinity of lower than 90%, and
• wherein a ratio of the paraffin wax to the polyethylene wax is in a range of from 1:10 to 2:1.

An image-forming method, comprising:

• obtaining a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge holding member with an electrophotographic toner;
• transferring a visualized toner image onto a recording medium;
• and
• fixing the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a hydrocarbon wax having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%, and
• wherein a ratio of the hydrocarbon wax to the polyethylene wax is in a range of from 1:10 to 2:1.

An image-forming method, comprising:

• obtaining a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge holding member with an electrophotographic toner;
• transferring a visualized toner image onto a recording medium;
• and
• fixing the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• an alpha olefin having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%, and
• wherein a ratio of the alpha olefin to the polyethylene wax is in a range of from 1:10 to 2:1.

An image-forming method, comprising:

• obtaining a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge holding member with an electrophotographic toner;
• transferring a visualized toner image onto a recording medium;
• and
• fixing the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a paraffin wax having a number-average molecular weight of 300 to 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 10 mPa·s at 140° C. and a crystallinity of lower than 90%, and
• wherein a ratio of the paraffin wax to the polyethylene wax is in a range of from 1:10 to 2:1.

An electrophotographic toner comprising:

• a fixing resin;
• a colorant;
• and
• a wax;
• wherein the wax at least comprises;
• a hydrocarbon wax having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%,
• wherein a ratio of the hydrocarbon wax to the polyethylene wax is in a range of from 1:10 to 2:1,
• wherein a maximum of absorption peaks in a heat-up time absorption calorie carve in a DSC curve of the toner measured by a differential scanning calorimeter is at a temperature not higher than 75° C., and
• wherein an onset temperature in absorption of heat is not higher than 65° C.

An electrophotographic toner comprising:

• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• an alpha olefin having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mpa·s at 140° C. and a crystallinity of lower than 95%,
• wherein a ratio of the alpha olefin to the polyethylene wax is in a range of from 1:10 to 2:1,
• wherein a maximum of absorption peaks in a beat-up time absorption calorie curve in a DSC curve of the toner measured by a differential scanning calorimeter is at a temperature not higher than 75° C., and
• wherein an onset temperature in absorption of heat is not higher than 65° C.

An electrophotographic toner, comprising:

• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a paraffin wax having a number-average molecular weight of 300 to 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 10 mPa·s at 140° C. and a crystallinity of lower than 90%,
• wherein a ratio of the paraffin wax to the polyethylene wax is in a range of from 1:10 to 2:1,
• wherein a maximum of absorption peaks in a heat-up time absorption calorie curve in a DSC curve of the toner measured by a differential scanning calorimeter is at a temperature not higher than 75° C., and
• wherein an onset temperature in absorption heat is not higher than 55° C.

An image-forming system, comprising:

• an electrostatic charge holding member;
• an electrophotographic toner;
• a developing unit that obtains a recording image by visualizing an electrostatic charge latent image form on an electrostatic charge holding member with the electrophotographic toner;
• a transfer unit that transfers a visualized toner image onto a recording medium;
• and
• a fixing unit that fixes the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a hydrocarbon wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 95%,
• wherein a ratio of the hydrocarbon wax to the polyethylene wax is in a range of from 1:10 to 2:1,
• wherein a maximum of absorption peaks in a heat-up time absorption calorie curve in a DSC curve of the toner measured by a differential scanning calorimeter is at a temperature not higher than 75° C., and
• wherein an onset temperature in absorption of heat is not higher than 65° C.

An image-forming system-comprising:

• an electrostatic charge holding member;
• an electrophotographic toner;
• a developing unit that obtains a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge latent image formed on an electrostatic charge holding member with the electrophotographic toner;
• a transfer unit that transfers a visualized toner image onto a recording medium;
• and
• a fixing unit that fixes the toner image transferred onto the recording medium;
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• an alpha olefin having a number-average molecular weight of not higher than 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 15 mPa·s at 140° C. and a crystallinity of lower than 15 mPa·s at 140° C. and crystallinity of lower than 95%,
• wherein a ratio of the alpha olefin to the polyethylene wax is in a range of from 1:10 to 2:1,
• wherein a maximum of absorption peaks in a heat-up time absorption calorie curve in a DSC curve of the toner measured by a differential scanning calorimeter is at a temperature not higher than 75° C., and
• wherein an onset temperature in absorption of heat is not higher than 65° C.

An image-forming system, comprising:

• an electrostatic charge holding member;
• an electrophotographic toner;
• a developing unit that obtains a recording image by visualizing an electrostatic charge latent image formed on an electrostatic charge holding member with the electrophotographic toner;
• a transfer unit that transfers a visualized toner image onto a recording medium;
• and
• a fixing unit that fixes the toner image transferred onto the recording medium,
• wherein the electrophotographic toner comprises:
• a fixing resin;
• a colorant;
• and
• a wax,
• wherein the wax at least comprises:
• a paraffin wax having a number-average molecular weight of 300 to 600;
• and
• a polyethylene wax having a number-average molecular weight of not higher than 600, a melting viscosity of lower than 10 mPa·s at 140° C. and a crystallinity of lower than 90%,
• wherein a ratio of the paraffin wax to the polyethylene wax is in a range of from 1:10 to 2:1,
• wherein a maximum of absorption peaks in a heat-up time absorption calorie curve in a DSC curve of the toner measured by a differential scanning colorimeter is at a temperature not higher than 75° C., and
• wherein an onset temperature in absorption of heat is not higher than 55° C.