# US 10,500,565 B2 · Porous body and method for producing the same, ink jet printing method and ink jet printing apparatus

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- Number: US 10,500,565 B2
- Document ID: US10500565B2
- Status: Granted
- Kind: B2
- Application number: 16/016,922
- Filed: 2018-06-25
- Published: 2019-01-03
- Granted: 2019-12-10
- Earliest claimed: 2017-06-30
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Hiroe Ishikura
- Web page: https://patentgrep.com/patent/US10500565B2

## CPC

- B01J 20/261: {obtained by reactions only involving carbon to carbon unsaturated bonds (macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds per se C08F)}
- B01J 20/28023: {Fibres or filaments (fibres or filaments in the form of membranes B01J20/28038; B01J20/28007 takes precedence)}
- B01J 20/28085: {being more than 50 nm, i.e. macropores}
- B41J 11/0015: {for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114)}
- B41J 2002/012: {with intermediate transfer member}
- B41M 7/00: After-treatment of prints, e.g. heating, irradiating, {setting of the ink, protection of the printed stock (pre-treatment or treatment during printing B41M5/0011; printers for treating or overcoating copy materials before, during or after printing B41J11/0015)}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)

## Abstract

The present invention provides a porous body for the absorption of a liquid component contained in an ink image on an ink receiving medium, the porous body including a fiber having a pore structure in the inside, wherein the pore structure satisfies the following requirements (a) and (b), and an inter-fiber void ratio which indicates the volume ratio of a void formed between the each fibers is 40% or more to 80% or less: (a) average pore size/average fiber diameter is 0.2 or less; and (b) an intra-fiber void ratio is 5% or more to 40% or less.

## Claims

### Claim 1

An ink jet printing apparatus comprising:
an ink application apparatus which applies ink onto an ink receiving medium to form an ink image; and
a liquid absorbing member having a porous body which comes into contact with the ink image and absorbs at least a portion of a liquid component from the ink image,
the porous body comprising a fiber having a pore structure in the inside, wherein
the pore structure satisfies the following requirements (a) and (b), and
an inter-fiber void ratio which indicates the volume ratio of a void formed between f the each fibers is 40% or more to 80% or less:
(a) average pore size/average fiber diameter is 0.2 or less; and
(b) an intra-fiber void ratio is 5% or more to 40% or less.

### Claim 2 (depends on 1)

The ink jet printing apparatus according to claim 1, further comprising a reaction solution application apparatus which applies a reaction solution that is rendered highly viscous upon contact with the ink, onto the ink receiving medium.

### Claim 3 (depends on 1)

The ink jet printing apparatus according to claim 1, wherein the ink receiving medium is a printing medium.

### Claim 4 (depends on 1)

The ink jet printing apparatus according to claim 1, wherein the ink receiving medium is a transfer body, wherein the ink jet printing apparatus further comprises a pressing member for transfer which transfers the ink image after the liquid component removal to a printing medium by bringing the printing medium into contact with the transfer body.