Toner and production process for the same
View Patent ↗A toner includes core particles containing a resin and a colorant, and a coating layer formed over the core particles. The coating layer includes at least one type of coating particles selected from the group consisting of wax-containing resin microparticles containing a resin and a wax, and colorant-containing resin microparticles containing a resin and a colorant, the coating particles fusion-bonded to the surface of the core particles.
1. A toner comprising core particles containing a resin and a colorant, a first coating layer formed over the core particles, and a second coating layer formed over said first coating layer, wherein
said first coating layer is formed in a dry system using at least one type of coating particles selected from the group consisting of wax-containing resin microparticles containing a resin and a wax, and colorant-containing resin microparticles containing a resin and a colorant, the coating particles fusion-bonded to the surface of said core particles.
2. The toner as claimed in claim 1 , wherein a wax content of said first coating layer is 1 to 50 wt%.
3. The toner as claimed in claim 1 , wherein a colorant content of said first coating layer is 0.5 to 15 wt%.
4. The toner as claimed in claim 1 , wherein the weight of the first coating layer is 3 to 30 parts by weight based on 100 parts by weight of said core particles.
5. The toner as claimed in claim 1 , wherein a wax content of said first coating layer is 1 to 10 wt%.
6. The toner as claimed in claim 1 , wherein said second coating layer is formed in a dry system.
7. The toner as claimed in claim 1 , wherein a wax content of the overall coating layers is 1 to 50 wt%.
8. The toner as claimed in claim 1 , wherein a colorant content of the overall coating layers is 0.5 to 15 wt%.
9. The toner as claimed in claim 1 , wherein the weight of the overall coating layers is 3 to 30 parts by weight based on 100 parts by weight of said core particles.
10. A toner comprising core particles containing a resin and a colorant, a first coating layer formed over the core particles, and a second coating layer formed over said first coating layer, wherein
said first coating layer is formed in a dry system using at least one type of coating particles selected from the group consisting of wax microparticles and colorant microparticles attached to the surface of the core particles; and coating particles of resin microparticles fusion-bonded onto the attached coating particles.
11. The toner as claimed in claim 10 , wherein a wax content of said first coating layer is 1 to 50 wt%.
12. The toner as claimed in claim 10 , wherein a colorant content of said first coating layer is 0.5 to 15 wt%.
13. The toner as claimed in claim 10 , wherein the weight of the first coating layer is 3 to 30 parts by weight based on 100 parts by weight of said core particles.