Ink jet recording apparatus and method of producing porous body

Patent metadata

Field	Value
Publication number	US-2018319166-A1
Application number	US-201816022143-A
Country	US
Kind code	A1
Filing date	Jun 28, 2018
Priority date	Jan 5, 2016
Publication date	Nov 8, 2018
Grant date	—

Abstract

An ink jet recording apparatus includes an image forming unit that forms a first image containing a first liquid and a coloring material on an ink receiving medium; and a liquid absorbing member that includes a porous body which is configured to be brought into contact with the first image so as to absorb at least a portion of the first liquid from the first image, in which the porous body is a porous sheet in which a first layer which is configured to be brought into contact with the first image, a second layer including a second fiber and a third layer including a third fiber are laminated in this order.

First claim

What is claimed is:

1 . An ink jet recording apparatus comprising:
an image forming unit that forms a first image containing a first liquid and a coloring material on an ink receiving medium; and a liquid absorbing member that includes a porous body which is configured to be brought into contact with the first image so as to absorb at least a portion of the first liquid from the first image, wherein the porous body is a porous sheet in which a first layer which is configured to be brought into contact with the first image, a second layer including a second fiber and a third layer including a third fiber are laminated in this order, and the first layer, the second layer and the third layer are all porous layers, wherein an average fiber diameter of the second fiber is larger than an average fiber diameter of the third fiber, wherein the second fiber has a core-in-sheath structure including a core structure forming a central axis and a sheath structure surrounding the core structure, wherein a softening temperature of a material for forming the sheath structure is lower than any of a softening temperature of a material for forming the core structure, a softening temperature of a material for forming the first layer and a softening temperature of a material for forming the third fiber, and wherein an average thickness of the sheath structure is smaller than a thickness of the first layer.

2 . An ink jet recording apparatus comprising:
an image forming unit that forms a first image containing a first liquid and a coloring material on an ink receiving medium; and a liquid absorbing member that includes a porous body which is configured to be brought into contact with the first image so as to absorb at least a portion of the first liquid from the first image, wherein the porous body is a porous sheet in which a first layer which is configured to be brought into contact with the first image, a second layer a including a second fiber a, a second layer b including a second fiber b and a third layer including a third fiber are laminated in this order, and the first layer, the second layer a, the second layer b and the third layer are all porous layers, wherein an average fiber diameter of the second fiber b is larger than an average fiber diameter of the third fiber, wherein the second fiber a and the second fiber b have a core-in-sheath structure including a core structure forming a central axis and a sheath structure surrounding the core structure, wherein a softening temperature of a material for forming the sheath structure of the second fiber a is lower than any of a softening temperature of a material for forming the core structure of the second fiber a and a softening temperature of a material for forming the first layer, wherein a softening temperature of a material for forming the sheath structure of the second fiber b is lower than any of a softening temperature of a material for forming the core structure of the second fiber b and a softening temperature of a material for forming the third fiber, and wherein an average thickness of the sheath structure of the second fiber a is smaller than a thickness of the first layer.

3 . The ink jet recording apparatus according to claim 1 ,
wherein Young's modulus of the material for forming the third fiber is higher than Young's modulus of the material for forming the first layer.

4 . The ink jet recording apparatus according to claim 1 ,
wherein an average pore diameter on a surface of the first layer which comes into contact with the first image is 0.2 μm or smaller.

5 . The ink jet recording apparatus according to claim 1 ,
wherein the first layer includes a fluororesin.

6 . The ink jet recording apparatus according to claim 1 ,
wherein the third fiber includes polyphenylene sulfide or polyimide.

7 . The ink jet recording apparatus according to claim 1 ,
wherein the image forming unit includes a device for applying a first liquid composition containing the first liquid or a second liquid, and an ink viscosity-increasing component onto the ink receiving medium, and a device for applying a second liquid composition containing the first liquid or a second liquid, and the coloring material onto the ink receiving medium, and wherein the first image is a mixture of the first and second liquid compositions and is viscously thickened more than either of the first and second liquid compositions.

8 . The ink jet recording apparatus according to claim 1 ,
wherein the ink receiving medium is a transfer body for temporarily holding the first image and a second image obtained by absorbing the first liquid from the first image, and wherein the apparatus further comprising: a transfer unit including a pressing member for transferring the second image onto a recording medium on which an image is to be formed.

9 . The ink jet recording apparatus according to claim 1 ,
wherein the ink receiving medium is a recording medium on which an image is to be formed.

10 . An ink jet recording apparatus comprising:
an image forming unit that forms a first image on an ink receiving medium by applying ink containing a first liquid and a coloring material; and a liquid absorbing member that includes a porous body which is configured to be brought into contact with the first image so as to concentrate ink constituting the first image, wherein the porous body is a porous sheet in which a first layer which is configured to be brought into contact with the first image, a second layer including a second fiber and a third layer including a third fiber are laminated in this order, and the first layer, the second layer and the third layer are all porous layers, wherein an average fiber diameter of the second fiber is larger than an average fiber diameter of the third fiber, wherein the second fiber has a core-in-sheath structure including a core structure forming a central axis and a sheath structure surrounding the core structure, wherein a softening temperature of a material for forming the sheath structure is lower than any of a softening temperature of a material for forming the core structure, a softening temperature of a material for forming the first layer and a softening temperature of a material for forming the third fiber, and wherein an average thickness of the sheath structure is smaller than a thickness of the first layer.

11 . A method of producing a porous body used in an ink jet recording apparatus including an image forming unit that forms a first image containing a first liquid and a coloring material on an ink receiving medium; and a liquid absorbing member that includes a porous body which is configured to be brought into contact with the first image so as to absorb at least a portion of the first liquid from the first image, the method comprising:
a step of heating a first layer which is configured to be brought into contact with the first image, a second layer including a second fiber and a third layer including a third fiber in a state of being laminated in this order so as to form a porous body including the first layer, the second layer and the third layer, wherein the first layer, the second layer and the third layer are all porous layers, wherein an average fiber diameter of the second fiber is larger than an average fiber diameter of the third fiber, wherein the second fiber has a core-in-sheath structure including a core structure forming a central axis and a sheath structure surrounding the core structure, wherein a softening temperature of a material for forming the sheath structure is lower than any of a softening temperature of a material for forming the core structure, a softening tempera

Assignees

• Canon Kk

Inventors

• Yamane Toru
• Mouri Akihiro
• Toyama Noboru
• Hirokawa Ryosuke
• Deguchi Kyosuke
• Ohnishi Toru

Classifications

• B41J2002/012

  with intermediate transfer member · CPC title

• B41J11/0015

  for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114) · CPC title

• B41L27/26

  Absorbent pads · CPC title

• B41J2/01 Primary

  Ink jet · CPC title

• B41J2/2103 Primary

  Features not dealing with the colouring process per se, e.g. construction of printers or heads, driving circuit adaptations · CPC title