JP2018173499A5

JP2018173499A5 -

Info

Publication number: JP2018173499A5
Application number: JP2017070588A
Authority: JP
Filing date: 2017-03-31
Publication date: 2020-05-14
Anticipated expiration: 2037-03-31

Description

本発明は、結晶性材料および着色剤を含有するトナー母粒子を有するトナー粒子を有するトナーであって、
該結晶性材料が、ワックスおよび結晶性ポリエステルを含有し、
該トナーの１００℃から冷却して測定する動的粘弾性測定において、１００℃、６０℃および５０℃における貯蔵弾性率をそれぞれＧ’（１００℃）、Ｇ’（６０℃）およびＧ’（５０℃）としたとき、下記式（１）、下記式（２）および下記式（３）を満たす
式（１）Ｇ’（６０℃）≦４．５×１０⁸（Ｐａ）
式（２）Ｇ’（６０℃）／Ｇ’（１００℃）≦７．０×１０²
式（３）Ｇ’（５０℃）／Ｇ’（６０℃）≧３．０×１０
ことを特徴とするトナーに関する。 The present invention is a toner having toner particles having toner mother particles containing a crystalline material and a colorant,
The crystalline material using the wax and crystalline polyester,
In the dynamic viscoelasticity measurement of the toner cooled from 100 ° C., the storage elastic moduli at 100 ° C., 60 ° C. and 50 ° C. are G ′ (100 ° C.), G ′ (60 ° C.) and G ′ (50 ° C.) and the time, the following equation (1), the following equation (2) Contact and the following formula (3) wherein that meets the (1) G '(60 ℃ ) ≦ 4.5 × 10 8 (Pa)
Formula (2) G ′ (60 ° C.) / G ′ (100 ° C.) ≦ 7.0 × 10 ²
Formula (3) G ′ (50 ° C.) / G ′ (60 ° C.) ≧ 3.0 × 10
The present invention relates to a toner.

Claims

A toner having toner particles having toner mother particles containing a binder resin, a crystalline material and a colorant,
The crystalline material using the wax and crystalline polyester,
In the dynamic viscoelasticity measurement of the toner cooled from 100 ° C., the storage elastic moduli at 100 ° C., 60 ° C. and 50 ° C. are G ′ (100 ° C.), G ′ (60 ° C.) and G ′ (50 ° C.) and the time, the following equation (1), the following equation (2) Contact and the following formula (3) wherein that meets the (1) G '(60 ℃ ) ≦ 4.5 × 10 8 (Pa)
Formula (2) G ′ (60 ° C.) / G ′ (100 ° C.) ≦ 7.0 × 10 ²
Formula (3) G ′ (50 ° C.) / G ′ (60 ° C.) ≧ 3.0 × 10
Toner characterized by the above.

The number average diameter of the toner is not less than 4.0 .mu.m 12.0 .mu.m or less,
In cross-section observation of the toner particles with a transmission electron microscope, the domain of the crystalline material in the cross-section of toner particles is observed, and the number of the domains per cross-section of one toner particle, 300 20 or more Is less than
The arithmetic mean of the major axis of the domain and r ([mu] m), when the arithmetic mean value of the major axis of the cross section of the toner particles was R ([mu] m), equation (4) that satisfy the following formula (4) 5. 0 × 10 ⁻⁴ ≦ r / R ≦ 7.0 × 10 ⁻²
The toner according to claim 1.

The toner according to claim 1, wherein the wax contains an ester wax.

The toner according to claim 3 , wherein the ester wax has a melting point of 65.0 ° C or higher and 85.0 ° C or lower.

The ester wax is a condensate of an acid monomer and an alcohol monomer,
The number of carbon atoms which the acid monomer comprises an a, when the number of carbon atoms the alcohol monomer contains expressed by a and b, respectively, toner according to claim 3 or 4 ratio of b for a is 0.25 or less.

The toner according to claim 3, wherein the ester wax is a bifunctional ester wax.