# US 2014/0193751 A1 · Toner set, image forming apparatus, and image forming method

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- Number: US 2014/0193751 A1
- Document ID: US20140193751A1
- Status: Published application
- Kind: A1
- Application number: 13/944,416
- Filed: 2013-07-17
- Published: 2014-07-10
- Earliest claimed: 2013-01-09
- Assignees: Fuji Xerox Co., Ltd.
- Applicants: Fuji Xerox Co., Ltd.
- Inventors: Atsushi SUGITATE; Masaru TAKAHASHI; Shotaro TAKAHASHI; Sakiko HIRAI; Shuji SATO
- Web page: https://patentgrep.com/patent/US20140193751A1

## CPC

- G03G 9/0902: {Inorganic compounds}
- G03G 9/08795: {characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants}
- G03G 9/08797: {characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature}
- G03G 13/22: Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20 (G03G13/01 takes precedence)
- G03G 15/6585: {by using non-standard toners, e.g. transparent toner, gloss adding devices}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

Provided is a toner set including a brilliant toner containing a brilliant pigment and at least one kind of color toner containing a colorant, in which a ratio (G′ A/G′B) of G′A to G′B satisfies a relationship of 1≦G′A/G′B≦10, when a storage modulus in 120° C. of the brilliant toner is G′A and a storage modulus in 120° C. of the color toner is G′B.

## Claims

### Claim 1

A toner set comprising:
a brilliant toner containing a brilliant pigment; and
at least one kind of color toner containing a colorant,
wherein a ratio (G′A/G′B) of G′A to G′B satisfies a relationship of 1≦G′A/G′B≦10, when a storage modulus in 120° C. of the brilliant toner is G′A and a storage modulus in 120° C. of the color toner is G′B.

### Claim 2 (depends on 1)

The toner set according to claim 1,
wherein a ratio (A/B) of a reflectance A at a light-receiving angle of +30° to a reflectance B at a light-receiving angle of −30°, which are measured when a solid image is formed using the brilliant toner and the image is irradiated with incident light at an incidence angle of −45° by a variable angle photometer, is from 2 to 100.

### Claim 3 (depends on 1)

The toner set according to claim 1,
wherein an average equivalent-circle diameter D of the brilliant toner is longer than an average maximum thickness C thereof.

### Claim 4 (depends on 3)

The toner set according to claim 3,
wherein a ratio (C/D) of the average maximum thickness C to the average equivalent-circle diameter D is from 0.001 to 0.500.

### Claim 5 (depends on 1)

The toner set according to claim 1,
wherein the number of pigment particles arranged so that an angle formed by a long axis direction in a cross section of the brilliant toner and a long axis direction of the pigment particles is in a range of from −30° to +30°, is 60% or more.

### Claim 6 (depends on 1)

The toner set according to claim 1,
wherein the brilliant pigment is metallic aluminum.

### Claim 7 (depends on 1)

The toner set according to claim 1,
wherein a content of the brilliant pigment in the toner is from 4% by weight to 55% by weight.

### Claim 8 (depends on 1)

The toner set according to claim 1,
wherein the brilliant toner includes a binder resin, and a glass transition temperature of the binder resin is from 50° C. to 65° C.

### Claim 9 (depends on 8)

The toner set according to claim 8,
wherein Mw/Mn of the binder resin is from 1.5 to 100.

### Claim 10 (depends on 1)

The toner set according to claim 1,
wherein the brilliant toner includes a release agent, and a melting temperature of the release agent is from 50° C. to 100° C.

### Claim 11 (depends on 1)

The toner set according to claim 1,
wherein the storage modulus G′B in 120° C. of the color toner is from 500 Pas to 3000 Pas.

### Claim 12

A toner set comprising:
a brilliant toner containing a brilliant pigment; and
a yellow toner containing a yellow colorant,
wherein a ratio (G′A/G′B) of G′A to G′B satisfies a relationship of 1≦G′A/G′B≦10, when a storage modulus in 120° C. of the brilliant toner is G′A and a storage modulus in 120° C. of the yellow toner is G′B.

### Claim 13 (depends on 12)

The toner set according to claim 12,
wherein a ratio (A/B) of a reflectance A at a light-receiving angle of +30° to a reflectance B at a light-receiving angle of −30°, which are measured when a solid image is formed using the brilliant toner and the image is irradiated with incident light at an incidence angle of −45° by a variable angle photometer, is from 2 to 100.

### Claim 14 (depends on 12)

The toner set according to claim 12,
wherein an average equivalent-circle diameter D of the brilliant toner is longer than an average maximum thickness C thereof.

### Claim 15 (depends on 14)

The toner set according to claim 14,
wherein a ratio (C/Dy of the average maximum thickness C to the average equivalent-circle diameter D is from 0.001 to 0.500.

### Claim 16 (depends on 12)

The toner set according to claim 12,
wherein the number of pigment particles arranged so that an angle formed by a long axis direction in a cross section of the brilliant toner and a long axis direction of the pigment particles is in a range of from −30° to +30°, is 60% or more.

### Claim 17 (depends on 12)

The toner set according to claim 12,
wherein the brilliant pigment is metallic aluminum.

### Claim 18 (depends on 12)

The toner set according to claim 12,
wherein a content of the brilliant pigment in the toner is from 4% by weight to 55% by weight.

### Claim 19 (depends on 12)

The toner set according to claim 12,
wherein the brilliant toner includes a binder resin, and a glass transition temperature of the binder resin is from 50° C. to 65° C.

### Claim 20 (depends on 19)

The toner set according to claim 19,
wherein Mw/Mn of the binder resin is from 1.5 to 100.

### Claim 21 (depends on 12)

The toner set according to claim 12,
wherein the brilliant toner includes a release agent, and a melting temperature of the release agent is from 50° C. to 100° C.

### Claim 22 (depends on 12)

The toner set according to claim 12,
wherein the storage modulus G′B in 120° C. of the yellow toner is from 500 Pas to 3000 Pas.

### Claim 23

An image forming apparatus comprising:
a plurality of toner image forming units which includes at least a first toner image forming unit that forms a brilliant toner image using a brilliant toner containing a brilliant pigment, and a second toner image forming unit that forms a color toner image using a color toner containing a colorant;
a transfer unit that transfers at least the brilliant toner image and the color toner image onto a recording medium so as to superimpose with each other; and
a fixing unit that fixes at least the brilliant toner image and the color toner image on the recording medium,
wherein a ratio (G′A/G′B) of G′A to G′B satisfies a relationship of 1≦G′A/G′B≦10, when a storage modulus in 120° C. of the brilliant toner is G′A and a storage modulus in 120° C. of the color toner is G′B.

### Claim 24

An image forming method comprising:
forming a plurality of toner images which includes at least forming a first toner image of a brilliant toner image using a brilliant toner containing a brilliant pigment, and forming a second toner image of a color toner image using a color toner containing a colorant;
transferring at least the brilliant toner image and the color toner image onto a recording medium so as to superimpose with each other; and
fixing at least the brilliant toner image and the color toner image on the recording medium,
wherein a ratio (G′A/G′B) of G′A to G′B satisfies a relationship of 1≦G′A/G′B≦10, when a storage modulus in 120° C. of the brilliant toner is G′A and a storage modulus in 120° C. of the color toner is G′B.
