Ink composition, recording method and recorded image utilizing the same, ink set and ink head
First Claim
1. An ink composition comprising at least a coloring agent and a medium, wherein the ink composition has a dynamic surface tension, measured by a maximum bubble pressure method at a temperature of 24 to 26°
- C., and a static surface tension measured at a temperature of 24 to 26°
C. which satisfy the following relation (1);
0≦
[dynamic surface tension (mN/m)]−
[static surface tension (mN/m)]≦
7 (mN/m)
(1),said composition further comprising a surfactant which is present at least in an amount of a critical micelle concentration, wherein a bubble frequency, at which the dynamic surface tension is measured, is within a range from 0.5 to 35 Hz, and wherein the surfactant is a compound represented by any one of following general formulas (III), (IV) and (V)
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Accused Products
Abstract
An ink composition is prepared in such a manner that a difference between a dynamic surface tension (mN/m) measured by a maximum bubble pressure method at a temperature of 24 to 26° C. and a static surface tension (mN/m) is within a range from 0 to 7 (mN/m). The ink composition is stored in an ink tank of an ink head, and is supplied from the ink tank to an ink chamber having a discharge port, and a voltage is applied to partitions formed by a piezoelectric material to apply a pressure by the partitions to the ink composition stored in the ink chamber, whereby a liquid droplet of the ink composition is discharged from the discharge port and the liquid droplet is deposited on a recording material to record an image.
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Citations
39 Claims
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1. An ink composition comprising at least a coloring agent and a medium, wherein the ink composition has a dynamic surface tension, measured by a maximum bubble pressure method at a temperature of 24 to 26°
- C., and a static surface tension measured at a temperature of 24 to 26°
C. which satisfy the following relation (1);
0≦
[dynamic surface tension (mN/m)]−
[static surface tension (mN/m)]≦
7 (mN/m)
(1),said composition further comprising a surfactant which is present at least in an amount of a critical micelle concentration, wherein a bubble frequency, at which the dynamic surface tension is measured, is within a range from 0.5 to 35 Hz, and wherein the surfactant is a compound represented by any one of following general formulas (III), (IV) and (V) - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- C., and a static surface tension measured at a temperature of 24 to 26°
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20. An ink composition comprising at least a coloring agent and a medium, wherein among dynamic surface tensions measured by a maximum bubble pressure method at a temperature of 24 to 26°
- C., a dynamic surface tension (α
10) at a bubble frequency of 10 Hz and a dynamic surface tension (α
1) at a bubble frequency of 1 Hz have a difference d (=α
10−
α
1) satisfying the following relation (2);
0 mN/m≦
d≦
7 mN/m
(2),said composition further comprising a surfactant which is present at least in an amount of a critical micelle concentration, wherein a bubble frequency, at which the dynamic surface tension is measured, is within a range from 0.5 to 35 Hz, and wherein the surfactant is a compound represented by any one of following general formulas (XI), (XII) and (XIII) - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
- C., a dynamic surface tension (α
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21. An ink composition comprising at least a coloring agent and a medium, wherein among dynamic surface tensions measured by a maximum bubble pressure method at a temperature of 24 to 26°
- C., a dynamic surface tension (α
10) at a bubble frequency of 10 Hz and a dynamic surface tension (α
1) at a bubble frequency of 1 Hz have a difference d (=α
10−
α
1) satisfying the following relation (2);
0 mN/m≦
d≦
7 mN/m
(2),the coloring agent consists of a dye, and wherein the surfactant is a compound represented by any one of following general formulas (XI), (XII) and (XIII)
- C., a dynamic surface tension (α
Specification