Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Shinya Nakashima

Akira Matsumoto

Shinya Sakamoto

Yasuo Kadokura

Yukiaki Nakamura

Satoshi Miura

Masaki Iwase

Satoshi Yoshida

Tetsuya Taguchi

Tomohito Nakajima

Ryutaro Kembo

Tomohiro Shinya

Naomi Miyamoto

Takeshi Iwanaga

Shuji Sato

Susumu Yoshino

Masaru Takahashi

Noriyuki Mizutani

Takafumi Koide

Kosaku Yoshimura

Atsushi Sugawara

Daisuke Tomita

Masanobu Ninomiya

Hiroshi Nakazawa

Satoshi Kamiwaki

Takeshi Shoji

Sakiko Hirai

Shotaro Takahashi

Eiji Kawakami

Emi Miyata

A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G'of the toner at 50&#xb0; C. is 2&#xd7;10Pa or more and 3&#xd7;10Pa or less, a storage modulus G&#x2032;of the toner at 100&#xb0; C. is 1&#xd7;10Pa or more and 1&#xd7;10Pa or less, and tan &#x3b4;of the toner in an entire temperature range of 50&#xb0; C. or more and 100&#xb0; C. or less is 0.05 or more and 1.5 or less.

Toner for developing electrostatic charge image, electrostatic charge image developer, and toner cartridge

An electrostatic charge image developing toner includes a polar group-containing olefin resin that is a polymer of a composition containing at least one nonpolar monomer unit (X) selected from the group consisting of ethylene and &#x3b1;-olefin having 3 to 10 carbon atoms, a polar monomer unit (Y) having at least one of a maleic acid group and a maleic anhydride group, and a monomer unit (Z) having a polymerizability to at least one of the nonpolar monomer unit (X) and the polar monomer unit (Y), in which an acid value of the toner is 10 mgKOH/g to 60 mgKOH/g.

Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge

An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.

An electrostatic charge image developing toner includes toner particles including an amorphous resin and a crystalline resin, wherein, when the toner particles are subjected to a measurement by differential scanning calorimetry (DSC) before and after being stored at a temperature of 50&#xb0; C. and a humidity of 90% RH for 24 hours, a relationship between an onset temperature T1 (&#xb0; C.) of an endothermic peak having the lowest peak temperature in a first heating step with respect to the toner particles before being stored and an onset temperature T2 (&#xb0; C.) of an endothermic peak having the lowest peak temperature in a first heating step with respect to the toner particles after being stored satisfies Expression (1): 2&#x3c;T2&#x2212;T1&#x3c;10.

An electrostatic charge image developing toner includes toner particles including an amorphous resin and a crystalline resin, wherein, when the toner particles are subjected to a measurement by differential scanning calorimetry before and after being heated at a temperature of 50&#xb0; C. and a humidity of 50% RH for a week, a relationship between an endothermic amount S1 (J/g) derived from the crystalline resin in a first heating process with respect to the toner particles before being heated and an endothermic amount Sh (J/g) derived from the crystalline resin in a first heating process with respect to the toner particles after being heated satisfies Expression (1): 0.50&#x2264;S1/Sh&#x2264;0.90.

An electrostatic charge image developing toner includes toner particles including an amorphous resin and a crystalline resin, wherein, when the toner particles are subjected to a measurement by differential scanning calorimetry before and after being heated at a temperature of 50&#xb0; C. and a humidity of 50% RH for a week, a relationship between an endothermic amount x (J/g) derived from the crystalline resin with respect to the toner particles before being heated and an endothermic amount y (J/g) derived from the crystalline resin with respect to the toner particles after being heated satisfies Expression (1): x/y&#x3c;0.3.

An electrostatic charge image developing toner includes toner particles each including an amorphous resin and a crystalline resin, wherein, when the toner particles are subjected to a measurement to determine an area ratio of the crystalline resin on a cross section of the toner particle before and after being heated at a temperature of 50&#xb0; C. and a humidity of 50% RH for three days, a relationship between an area ratio a (%) of the crystalline resin on a cross section with respect to the toner particles before being heated, and an area ratio b (%) of the crystalline resin on the cross section with respect to the toner particles after being heated satisfies Expression (1): 0.9&#x2264;a/b&#x2264;1.0.

An electrostatic charge image developing toner includes toner particles including an amorphous resin and a crystalline resin, wherein, when the toner particles are subjected to a measurement to determine an area ratio of the crystalline resin present on a surface of the toner particle before and after being heated at a temperature of 50&#xb0; C. and a humidity of 50% RH for a week, a relationship between an area ratio a (%) of the crystalline resin present on a surface of the toner particles before being heated and an area ratio b (%) of the crystalline resin present on a surface of the toner particles after being heated satisfies Expression (1): 0.05&#x2264;(b&#x2212;a)/b&#x2264;0.50.

An electrostatic charge image developing toner includes toner particles containing a binder resin, a colorant, and 5'-chloro-3-hydroxy-2&#x2032;-methoxy-2-naphthanilide, wherein the colorant contains at least one of Pigment Red 238 and Pigment Red 269, the content of the colorant is from 1% by weight to 20% by weight, and the content of 5&#x2032;-chloro-3-hydroxy-2&#x2032;-methoxy-2-naphthanilide is from 1 ppm to 300 ppm based on the weight.

An electrostatic charge image developing toner includes toner particles containing a binder resin containing a polyester resin forming a sea part and a vinyl resin forming an island part of a sea-island structure, a first release agent existing in the sea part in a domain state, and a second release agent existing in the island part in a domain state, wherein when a cross-sectional area of the second release agent is set to A1 and a cross-sectional area of the first release agent is set to B1 in a cross section of the toner particles, a relationship of 0.2&#x2266;A1/B1&#x2266;0.8 is satisfied.

An electrostatic charge image developing toner includes a binder resin and a release agent, and when a peak temperature during a first temperature increase and a peak temperature during a second temperature increase, that are obtained by differential scanning calorimetry including performing the first temperature increase at 10&#xb0; C./min after holding at 10&#xb0; C., performing cooling at &#x2212;10&#xb0; C./min, performing a heat treatment for 24 hours at 50&#xb0; C., and performing the second temperature increase at 10&#xb0; C./min, are represented by Tt1 and Tt2, respectively, the following Expression (1) is satisfied:1&#x3c;2.&#x2003;&#x2003;Expression (1):

An electrostatic charge image developing toner includes an amorphous polyester resin and a crystalline polyester resin as a binder resin, and by differential scanning calorimetry, which undergoes processes of a first temperature rise, cooling at a rate of &#x2212;10&#xb0; C./min and a second temperature rise, an endothermic peak (1) derived from a resin in which at least the amorphous polyester resin and the crystalline polyester resin are compatible is present in the first temperature rise, an exothermic peak having an intensity of 0.1 J/g or more is not present during the first temperature rise, and at least one exothermic peak (2) is present in a temperature range which is lower than that of the endothermic peak (1) by from 5&#xb0; C. to 15&#xb0; C. during the second temperature rise.

The invention provides a toner for electrostatic image development having a binder resin containing a amorphous polyester resin and a crystalline polyester resin, and a coloring agent, and satisfying the following relationship (1):()&#x3e;()&#x3e;()&#x2003;&#x2003;(1)wherein SP(H) is the solubility parameter of a resin contained in an elution fraction F (0-10) from the beginning of elution of Wuntil 10% of elution of Wwhen Wis the whole area of an elution curve on a gel permeation chromatograph measured for an acetone-soluble fraction; SP(L) is the solubility parameter of a resin contained in an elution fraction F (80-100) from 80% to 100% of the elution of W; and SP(C) is the solubility parameter of the crystalline polyester resin.

Toner for electrostatic image development, method of producing the same, electrostatic image developer, toner cartridge, process cartridge, and image forming apparatus

An electrostatic image developing toner includes a binding resin and a release agent, wherein an organic silicon compound including a siloxane bond is present in a domain of the release agent.

Electrostatic image developing toner, method for producing electrostatic image developing toner, method for forming image, and image forming apparatus

There is provided a toner for electrostatic charge image development, which includes a binder resin that includes a non-crystalline polyester resin and a crystalline polyester resin, and a colorant, wherein in a measurement of an acetone-soluble fraction of the toner by gel permeation chromatography, in which W1 represents the total area of an elution curve of the acetone-soluble fraction, F(0-10) represents an eluate corresponding to from the beginning of the elution to 10% elution of W1 over time, and F(80-100) represents an eluate corresponding to from 80% elution to 100% elution of W1 over time, the amount of an aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(0-10) is in the range of from about 0 mol % to about 10 mol % relative to the total amount of the acid-derived components of the resins contained in the eluate F(0-10), and the amount of the aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(80-100) is in the range of from about 20 mol % to about 60 mol % relative to the total amount of the acid-derived components of the resins contained in the eluate F(80-100).

Toner for electrostatic charge image development and manufacturing method thereof, and electrostatic charge image developer, toner cartridge, process cartridge and image forming apparatus

Growing community of inventors

Kanagawa, Japan

Shinya Nakashima