Electrophotographic developer

Abstract

Abstract PURPOSE:To obtain an electrophotographic one-component type developer not causing offset phenomenon in the pressure fixation method, by incorporating a thermoplastic resin, a fine magnetic powder, and polyvinylidene fluoride in a specified proportion. CONSTITUTION:A thermoplastic resin, such as polyethylene, is used as a binder, an amt. of magnetic powder almost same as this is added, and further, polyvinylidene fluoride is added by 1-20wt% of them. The compsn. is kneaded with heating in a pair of rolls, finely pulverized after cooling and soldifying, and resulting in obtaining a one-component type developer having about 15mum average particle diameter. Said developer contains polyvinylidene chloride having superior lubricity, so the developer is almost prevented from melt sticking to the pressing rolls, a developing sleeve, a photoreceptor surface, etc., and from blocking or the like during storage, and it has sufficient pressure fixability.

Inventors

• 👤 Kazumasa Saito
• 👤 斎藤　和正
• 👤 Norio Saruwatari
• 👤 紀男 猿渡
• 👤 Seiji Okada
• 👤 誠二 岡田
• 👤 Isao Watanabe
• 👤 勲 渡辺
• 👤 Toshiaki Narisawa
• 👤 成沢　俊明
• 👤 Hirofumi Okuyama
• 👤 奥山　弘文

Bibliographic Details