| 摘要 |
PURPOSE:To obtain carriers having triboelectric characteristics, no trouble like abrasion or peeling of a coated layer, and long life, by using polyborosiloxanes as the coating material of carrier core. CONSTITUTION:Polyborosiloxanes expressed by the formula, and those substituted by at least one of alkyl, halogen, alkoxy, and amino groups are used. At least one of these materials is dissolved in a solvent, spray coated on carrier cores, such as steel beads in a Wurster type recirculating fluidized bed, hardened in a 360-380 deg.C oven, cooled and sieved to produce carriers. Said polyborosiloxanes can be used as a primer layer prior to formation of a coated layer known thus far and as an overcoat layer. |
