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1
US20190219937A1
Publication/Patent Number: US20190219937A1
Publication date: 2019-07-18
Application number: 16/368,121
Filing date: 2019-03-28
Abstract: The present invention aims to provide an electrophotographic photoreceptor including a charge transport layer and being excellent in electrical properties and adhesiveness while exhibiting sufficient abrasion resistance indispensable for prolonging the life, and an electrophotographic photoreceptor cartridge and an image forming apparatus including the electrophotographic photoreceptor, which is an electrophotographic photoreceptor including a charge transport layer including at least two layers, wherein an elastic deformation ratio of a binder resin contained in a first charge transport layer which is an outermost layer and an elastic deformation ratio of a binder resin contained in a second charge transport layer satisfy a predetermined relationship. The present invention aims to provide an electrophotographic photoreceptor including a charge transport layer and being excellent in electrical properties and adhesiveness while exhibiting sufficient abrasion resistance indispensable for prolonging the life, and an ...more ...less
2
US10203616B2
Publication/Patent Number: US10203616B2
Publication date: 2019-02-12
Application number: 15/622,843
Filing date: 2017-06-14
Abstract: The present invention relates to an electrophotographic photoreceptor comprising: a conductive support; and a photosensitive layer on the conductive support, wherein the photosensitive layer contains a charge transport substance, a binder resin, and a compound which has a molecular weight of equal to or less than 350, and is represented by General Formula (1). The present invention relates to an electrophotographic photoreceptor comprising: a conductive support; and a photosensitive layer on the conductive support, wherein the photosensitive layer contains a charge transport substance, a binder resin, and a compound which has a ...more ...less
3
US10185237B2
Publication/Patent Number: US10185237B2
Publication date: 2019-01-22
Application number: 14/992,603
Filing date: 2016-01-11
Abstract: An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and the amount of bisphenol residues represented by formula (3) after the polyarylate resin is hydrolyzed, is 0.2% to 1%, in terms of intensity ratio, based on the total amount of bisphenol residues represented by formula (2) and formula (3) after the polyarylate resin is hydrolyzed, the bisphenol residues being detected with a gas chromatograph employing a hydrogen flame ionization detector (FID). An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and ...more ...less
4
US9964868B2
Publication/Patent Number: US9964868B2
Publication date: 2018-05-08
Application number: 15/429,558
Filing date: 2017-02-10
Inventor: Fujii, Akiteru  
Abstract: The invention relates to a multilayer type electrophotographic photoreceptor comprising: a conductive support; and, on the conductive support, a charge generation layer containing a hydroxygallium phthalocyanine pigment and a charge transport layer, wherein the content of α-chloronaphthalene in hydroxygallium phthalocyanine pigment in the charge generation layer is in a range of 0 ng/cm2 to 0.1 ng/cm2, the charge transport layer contains a non-halogen organic solvent having a boiling point of 140° C. or more, and the content of the non-halogen organic solvent having a boiling point of 140° C. or more is in a range of 0.1 μg/cm2 to 5 μg/cm2. The invention relates to a multilayer type electrophotographic photoreceptor comprising: a conductive support; and, on the conductive support, a charge generation layer containing a hydroxygallium phthalocyanine pigment and a charge transport layer, wherein the content of ...more ...less
5
US09880477B2
Publication/Patent Number: US09880477B2
Publication date: 2018-01-30
Application number: 14/869,364
Filing date: 2015-09-29
Inventor: Fujii, Akiteru  
Abstract: The invention provides an image forming apparatus and an electrophotographic photoreceptor, comprising: a conductive support; and at least a charge generation layer and a charge transport layer on the conductive support, wherein said charge generation layer contains a hydroxygallium phthalocyanine synthesized using a halogen solvent, said charge transport layer contains a polyester resin having a specific structural unit, and said charge transport layer is formed using a non-halogen solvent. The invention provides an image forming apparatus and an electrophotographic photoreceptor, comprising: a conductive support; and at least a charge generation layer and a charge transport layer on the conductive support, wherein said charge generation layer contains a ...more ...less
6
US9977354B2
Publication/Patent Number: US9977354B2
Publication date: 2018-05-22
Application number: 15/376,941
Filing date: 2016-12-13
Abstract: Provided is a lamination-type electrophotographic photoreceptor comprising a conductive substrate, and a charge transport layer and a charge generation layer both on the conductive substrate, wherein the charge transport layer comprises a charge transport substance represented by the general formula (1), a binder resin, and a particulate silicon compound. Provided is a lamination-type electrophotographic photoreceptor comprising a conductive substrate, and a charge transport layer and a charge generation layer both on the conductive substrate, wherein the charge transport layer comprises a charge transport substance represented ...more ...less
7
WO2018062518A1
Publication/Patent Number: WO2018062518A1
Publication date: 2018-04-05
Application number: 2017035579
Filing date: 2017-09-29
Abstract: The purpose of the present invention is to provide: an electrophotographic photoreceptor having a charge transport layer that has excellent electrical characteristics and adhesion, while manifesting satisfactory wear resistance indispensable for long service life, and an electrophotographic photoreceptor cartridge and an image formation device provided with the electrophotographic photoreceptor. The present invention pertains to an electrophotographic photoreceptor having a charge transport layer comprising at least two layers, the elastic deformation rate of the binder resin contained in a first charge transport layer, which is the outermost layer, and the elastic deformation rate of the binder resin contained in a second charge transport layer, satisfying a prescribed relationship. The purpose of the present invention is to provide: an electrophotographic photoreceptor having a charge transport layer that has excellent electrical characteristics and adhesion, while manifesting satisfactory wear resistance indispensable for long service life, and an ...more ...less
8
JP6160103B2
Publication/Patent Number: JP6160103B2
Publication date: 2017-07-12
Application number: 2013023428
Filing date: 2013-02-08
Inventor: Fujii, Akiteru  
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that quantitatively grasps crack resistance against a contact member to have excellent responsiveness and crack resistance
9
JP2017146594A
Publication/Patent Number: JP2017146594A
Publication date: 2017-08-24
Application number: 2017022133
Filing date: 2017-02-09
Inventor: Fujii, Akiteru  
Abstract: PROBLEM TO BE SOLVED: To solve problems that
10
US20170235240A1
Publication/Patent Number: US20170235240A1
Publication date: 2017-08-17
Application number: 15/429,558
Filing date: 2017-02-10
Inventor: Fujii, Akiteru  
Abstract: The invention relates to a multilayer type electrophotographic photoreceptor comprising: a conductive support; and, on the conductive support, a charge generation layer containing a hydroxygallium phthalocyanine pigment and a charge transport layer, wherein the content of α-chloronaphthalene in hydroxygallium phthalocyanine pigment in the charge generation layer is in a range of 0 ng/cm2 to 0.1 ng/cm2, the charge transport layer contains a non-halogen organic solvent having a boiling point of 140° C. or more, and the content of the non-halogen organic solvent having a boiling point of 140° C. or more is in a range of 0.1 μg/cm2 to 5 μg/cm2. The invention relates to a multilayer type electrophotographic photoreceptor comprising: a conductive support; and, on the conductive support, a charge generation layer containing a hydroxygallium phthalocyanine pigment and a charge transport layer, ...more ...less
11
US20170003607A1
Publication/Patent Number: US20170003607A1
Publication date: 2017-01-05
Application number: 15/269,379
Filing date: 2016-09-19
Inventor: Fujii, Akiteru  
Abstract: The invention provides an image forming apparatus and an electrophotographic photoreceptor, comprising: a conductive support; and at least a charge generation layer and a charge transport layer on the conductive support, wherein said charge generation layer contains a hydroxygallium phthalocyanine synthesized using a halogen solvent, said charge transport layer contains a polyester resin having a specific structural unit, and said charge transport layer is formed using a non-halogen solvent. The invention provides an image forming apparatus and an electrophotographic photoreceptor, comprising: a conductive support; and at least a charge generation layer and a charge transport layer on the conductive support, wherein said charge generation layer contains a ...more ...less
12
JP6060738B2
Publication/Patent Number: JP6060738B2
Publication date: 2017-01-18
Application number: 2013043077
Filing date: 2013-03-05
Inventor: Fujii, Akiteru  
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that suppresses optical fatigue even when a specific fluorene compound and diamine compound are used in combination
13
US20170090308A1
Publication/Patent Number: US20170090308A1
Publication date: 2017-03-30
Application number: 15/376,941
Filing date: 2016-12-13
Abstract: Provided is a lamination-type electrophotographic photoreceptor comprising a conductive substrate, and a charge transport layer and a charge generation layer both on the conductive substrate, wherein the charge transport layer comprises a charge transport substance represented by the general formula (1), a binder resin, and a particulate silicon compound. Provided is a lamination-type electrophotographic photoreceptor comprising a conductive substrate, and a charge transport layer and a charge generation layer both on the conductive substrate, wherein the charge transport layer comprises a charge transport substance represented ...more ...less
14
CN106462091A
Publication/Patent Number: CN106462091A
Publication date: 2017-02-22
Application number: 201580031797
Filing date: 2015-06-12
Abstract: Provided is a coating solution for use in the production of an electrophotographic photoreceptor
15
JP6107298B2
Publication/Patent Number: JP6107298B2
Publication date: 2017-04-05
Application number: 2013064730
Filing date: 2013-03-26
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that has good temporal stability of a coating liquid for charge transport layer formation
16
JP2017117814A
Publication/Patent Number: JP2017117814A
Publication date: 2017-06-29
Application number: 2015248132
Filing date: 2015-12-21
Abstract: PROBLEM TO BE SOLVED: To provide a high-quality semiconductor light emitting device.SOLUTION: A semiconductor light emitting device comprises: a first base material 31 having a first conductive layer 32; a second base material 41 having a second conductive layer 42; and a plurality of semiconductor light emitting elements 10 each of which has a first electrode on a first conductive side and a second electrode on a second conductive side which is the opposite conductive side to the first conductive side PROBLEM TO BE SOLVED: To provide a high-quality semiconductor light emitting device.SOLUTION: A semiconductor light emitting device comprises: a first base material 31 having a first conductive layer 32; a second base material 41 having a second conductive layer 42; and a ...more ...less
17
JP6135369B2
Publication/Patent Number: JP6135369B2
Publication date: 2017-05-31
Application number: 2013157892
Filing date: 2013-07-30
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that exhibits sufficient abrasion resistance necessary for a long-term use
18
JP2017067938A
Publication/Patent Number: JP2017067938A
Publication date: 2017-04-06
Application number: 2015191607
Filing date: 2015-09-29
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which is excellent in electric characteristics and ozone resistance characteristics
19
US9746816B2
Publication/Patent Number: US9746816B2
Publication date: 2017-08-29
Application number: 13/033,338
Filing date: 2011-02-23
Abstract: The invention is to provide an image forming apparatus and an electrophotographic cartridge, which are free from problems of cleaning failure, filming, soiling, residual images (ghosts), fogging, density reduction, noise and the like and which can provide high-definition images even when a toner having a small particle size and having a high degree of circularity is used and even when a photoreceptor having a small outer diameter is used. An image forming apparatus comprising: an electrophotographic photoreceptor containing a conductive support and a photosensitive layer on the conductive support, a charging unit for charging the electrophotographic photoreceptor, an imagewise exposing unit for imagewise exposing the charged electrophotographic photoreceptor to form an electrostatic latent image thereon, a developing unit for developing the electrostatic latent image with a toner, and a transferring unit for transferring the toner from the electrophotographic photoreceptor to a receiving unit, wherein the outer diameter of the electrophotographic photoreceptor is 20 mm or less, the photosensitive layer contains a polyarylate resin, and the toner satisfies the specific requirements (1) and (2). The invention is to provide an image forming apparatus and an electrophotographic cartridge, which are free from problems of cleaning failure, filming, soiling, residual images (ghosts), fogging, density reduction, noise and the like and which can provide high-definition images ...more ...less
20
US20170205719A1
Publication/Patent Number: US20170205719A1
Publication date: 2017-07-20
Application number: 15/468,145
Filing date: 2017-03-24
Abstract: The invention is to provide an image forming apparatus and an electrophotographic cartridge, which are free from problems of cleaning failure, filming, soiling, residual images (ghosts), fogging, density reduction, noise and the like and which can provide high-definition images even when a toner having a small particle size and having a high degree of circularity is used and even when a photoreceptor having a small outer diameter is used. An image forming apparatus comprising: an electrophotographic photoreceptor containing a conductive support and a photosensitive layer on the conductive support, a charging unit for charging the electrophotographic photoreceptor, an imagewise exposing unit for imagewise exposing the charged electrophotographic photoreceptor to form an electrostatic latent image thereon, a developing unit for developing the electrostatic latent image with a toner, and a transferring unit for transferring the toner from the electrophotographic photoreceptor to a receiving unit, wherein the outer diameter of the electrophotographic photoreceptor is 20 mm or less, the photosensitive layer contains a polyarylate resin, and the toner satisfies the specific requirements (1) and (2). The invention is to provide an image forming apparatus and an electrophotographic cartridge, which are free from problems of cleaning failure, filming, soiling, residual images (ghosts), fogging, density reduction, noise and the like and which can provide high-definition images ...more ...less