| 摘要 |
PURPOSE:To provide a toner having a uniform small particle size and uniformly containing an enough amt. of pigment which can give good resolution and picture density and to obtain the production method of this toner by using a hydrophobic material with dispersion of pigment for the core material and using a thermoplastic resin for the wall member of the toner particle. CONSTITUTION:The microcapsule-type toner 1 consists of a wall member 2 and a core material 3 sealed in the wall member. The core material 3 consists of a hydrophobic material 5 with dispersion of pigment 4. The wall member consists of a thermoplastic resin, for example, polystyrene, styrene-acrylate copolymers, styrene-acrylonitrile copolymers, etc. The toner is produced by mixing polymerizable monomers and the hydrophobic material 5 with dispersion of pigment 4 and emulsifying the mixture in water to polymerize the polymerizable monomers to form the wall member 2. In the production process, the pigment 4 and the polymerizable monomers are not directly mixed because of the presence of the hydrophobic material 5. Therefore, polymn. reaction of polymerizable monomers is not inhibited by the pigment, a uniform toner having a small particle size is obtd. |
