Fuji Xerox Co., Ltd.

Izuru Matsui

Koichi Takashima

Tsutomu Kubo

Kazufumi Tomita

Yoshihiro Inaba

Ken Hashimoto

Toshitake Yui

Fuminori Koide

Kazuya Furuta

Kazafumi Tomita

An ink recording method is disclosed, which comprises printing a recording paper with an aqueous ink and immediately thereafter applying pressure onto the recording paper, whereby sharp images can be printed at high speed even on a plain paper.

Ink recording method

A microcapsule toner comprising an outer shell and a core containing a fixable component, wherein the fixable component has a micro phase separation structure composed of a liquid continuous phase and a disperse phase containing a resin and having a glass transition temperature of not higher than 20.degree. C., and said fixable component contains a block and/or graft copolymer comprising two or more monomer components, at least one of the monomer components being compatible with said disperse phase with the other monomer component or components being compatible with said continuous phase. On pressure application, the toner is instantaneously fixed to provide a fixed toner image which does not fall off or is not destroyed by outer force. The fixable component forms a stable micro phase separation structure which satisfies both fluidity before fixing and hardness after fixing and retains fixability during long-term preservation.

Microcapsule toner having a microphase separation structure

An electrically-conductive toner comprising toner mother grains and a lubricant which is at least one selected from the group consisting of an aliphatic acid, an aliphatic acid metal salt, an aliphatic alcohol, an aliphatic amide, an aliphatic bisamide, and an aliphatic acid ester, the lubricant being in the form of finely divided grains having such a diameter that at least 99% by number of the finely divided grains have a diameter of 3 .mu.m or less.

Electrically-conductive toner, process for preparation of same, and

A capsule toner and a process for producing the same, the capsule toner comprising a core material containing a fixing component, an outer shell covering the core material, and an electrically conductive material adhered on the surface of the outer shell, the outer shell containing a polyurea resin and/or a polyurethane resin each obtained from an aliphatic polyisocyanate and an aromatic polyisocyanate. The capsule toner exhibits satisfactory charging properties while surely holding the fixing component inside to provide high quality images with excellent fixing properties.

Capsule toner and process for producing the same

A capsule toner and a process for producing the same, the capsule toner comprising a core material containing a fixing component, an outer shell covering the core material, and a chargeable substance adhered on the surface of the outer shell, the outer shell containing a polyurea resin and/or a polyurethane resin each obtained from an aliphatic polyisocyanate and an aromatic polyisocyanate. The capsule toner exhibits satisfactory charging properties while surely holding the fixing component inside to provide high quality images with excellent fixing properties.

A capsule toner comprising a core covered with an outer shell, the outer shell comprising a substance capable of forming a radical, a polymer comprising at least a unit derived from a quaternary ammonium salt-containing vinyl monomer represented by formula (I) being deposited on the surface of the outer shell, and basic carbon black being externally added to the capsule toner: ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group; R.sub.2, R.sub.3, and R.sub.4 each represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a benzyl group; Y represents --COO--, --CONH-- or a phenylene group; n represents an integer of from 1 to 7; and X.sup.- represents a halogen ion or an anion having a --COO.sup.- group or an --SO.sub.3.sup.- group.

Capsule toner

An electrophotographic toner comprising toner particles having adhered on the surface thereof a polymer comprising a monomer unit derived from a fluorine-containing vinyl monomer represented by formula (I) or (II): ##STR1## wherein X represents --COO--, --OCO--, --O--, or a p-phenylene group; R.sub.1 and R.sub.2 each represent a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms; m represents an integer of from 1 to 7; n represents an integer of from 1 to 19; o and p each represent an integer of from 0 to 7; and Y represents a hydrogen atom or a fluorine atom. The toner exhibits satisfactory charging stability against the environment or mechanical forces while having a narrow charge distribution. It can be prepared with a wide choice of materials and without requiring any special reaction apparatus.

Growing community of inventors

Minami-ashigara, Japan

Izuru Matsui