| 摘要 |
PURPOSE:To improve rigidity and heat resistance by constituting a microcapsule of a core material and a shell material which is packed with pulverous wear- resistant inorg. powder and coasts said material. CONSTITUTION:General resins are usable for the resin constituting the shell material. The powder which is resistant to water and org. solvent and is thermally stable to temp. up to, for example, 300 deg.C is preferable as the pulverous wear- resistant inorg. powder to be packed into the shell material. Both of an inorg. material which itself is extremely hard and hardly wearable as compared to the shell material resin and a material which is self-lubricative and is strong to friction are used for the pulverous inorg. wear-resistant powder. Silicate, etc. are used as the former example and molybenum dioxide, etc. are used as the latter example, A spray dry method and phase sepn. method are adopted to coat the core material with the shell material. The core material has rigidity and wear resistance although said material is thin and therefore the capsule toner is less deteriorated even afer long-term friction and the fixing with small energy is made possible. |
