Printed cloth and method of manufacturing the same

Details Printed cloth and method of manufacturing the same Printed cloth and method of manufacturing the same

2000-02-22

2002-03-05

Einsmann, Margaret (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Nominal textile manufacture process combined with dyeing

C008S495000, C008S499000, C008S552000, C008S561000, C008S563000, C008S580000, C008S581000, C008S585000, C008S638000

Reexamination Certificate

active

06352563

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a printed cloth on which dyes are deposited in dots and a method for the preparation thereof.
TECHNICAL BACKGROUND
Conventionally, screen printing process and roller printing process have been applied as the method for printing cloths. However, these processes require screens and chased rolls according to the desired printing patterns. Therefore, they showed difficulties in both workability and economics when each small lots of many grades was required to be printed.
Thus, the ink jet printing process has been investigated and various patent applications have been submitted including Japanese Laid-Open Patent Publication No. 6347 of 1986, No.300377 of 1990 and No.45774 of 1991.
Japanese Laid-Open Patent Publication No.6347 of 1986 describes that a fine pattern of deep color can be attained by performing dot dyeing so that a) the average of the major axis and the minor axis of the dot is 100 to 500 &mgr;m, b) the dot density is not higher than 16 dots/mm and c) the dots penetrate through the front surface to the back surface and part of the color points can be seen on the back surface of the cloth. However, by such a dyeing method, no deeper color can be attained than that attained by screen printing and no fine line of 0.3 mm or less can be attained as a printed pattern. It was also difficult to give an exact stripe pattern and a natural gradation pattern.
The object of the present invention is to provide a printed cloth in which fine line of 0.3 mm or less, an exact stripe pattern, a natural gradation pattern or the like is clearly dyed in a deep color, which could not be attained by conventional methods.
DISCLOSURE OF THE INVENTION
The product of the present invention is one in which a desired printed pattern is formed on a cloth by dyeing in dot a dye on it by a special ink jet process. The present invention is also characterized in that the dot dyeing is formed in a length of 0.05 to 0.3 mm to the longitudinal direction per single fiber unit constituting the cloth.
Thus, in the present invention, the dyeing unit of the dot dyeing formed is a very small line of 0.3 mm or less along the fiber to the longitudinal direction of the fiber with a thickness of the single fiber (about 0.01 to 0.1 mm). Therefore, each yarns constituting the cloth can be dyed in different colors as if they consist of different grandrelle yarns to obtain a product having fine lines, an exact stripe pattern and the like, which could not be accomplished up to now.
The printed pattern prepared by the present invention is basically formed by dot dyeing a very small line along the fiber of 0.3 mm or less to the longitudinal direction of the fiber with a thickness of the single fiber (about 0.01 to 0.1 mm). Alternatively, the dot dyeing is accomplished by each adjacent or plurality of adjacent fibers to a same color and the part in which one dot dyeing is made over the adjacent fibers such that half thicknesses of the adjacent fibers are dyed.
The product of the present invention can be prepared by a printing process according to ink jet method as described in Japanese Patent Application No.278112 of 1990, No.298399 of 1990 and No.88545 of 1991. However, it is preferred to be formed by using dyes of the three primary colors or the three primary colors and a black color as the dyes. By using them, the present invention can achieve not less than 125 combined colors per unit pattern.
Three dyes including yellow, red (magenta) and blue (cyan) are used as the dyes of the three primary colors. It is preferred to use dyes (I to IV) having a perceived chromaticity index defined in CIE 1976 (L, a, b) space on the cloth of at least in the following range respectively as these dyes and the black dye:
I
Yellow
(a)
−20~0
(b)
 50~90
II
Red
(a)
 50~70
(b)
 0~20
III
Blue
(a)
−50~−10
(b)
−50~−20
IV
Black
(a)
 −6~6
(b)
 −6~6
These dyes may also be used as a combination of at least two of each colors. The dyes of the following range can be also used in combination:
V
Yellow
(a)
 0~20
(b)
 50~90
VI
Yellow (orange)
(a)
 20~70
(b)
 40~90
VII
Red
(a)
 50~70
(b)
−20~0
VIII
Blue
(a)
−10~20
(b)
−50~−20
IX
Violet
(a)
 20~70
(b)
−50~−20
X
Green
(a)
−70~−20
(b)
 50~90
XI
Navy blue
(a)
−10~10
(b)
−20~−5
It has been found that a printed cloth of wide color range and of high clearness can be prepared particularly when seven dyes having a perceived chromaticity index defined in CIE 1976 (L, a, b) space on the cloth of at least the following range respectively are used in combination:
1. Yellow 1
(a)
−20~0
(b)
 50~90
2. Yellow 2
(a)
 0~20
(b)
 50~90
or
(a)
 40~60
(b)
 40~80
3. Red 1
(a)
 50~70
(b)
 0~20
4. Red 2
(a)
 50~70
(b)
−20~0
5. Blue 1
(a)
−40~−10
(b)
−50~−20
6. Blue 2
(a)
−10~20
(b)
−50~−20
7. Black
(a)
 −5~5
(b)
 −5~5
Generally, the color range which can be expressed by the three primary colors and the black color is within the range of the dotted line in FIG. 2A and a part of green, orange and violet can not be fully expressed in some cases. Therefore, in the case where it is required to express these colors, it is preferred to use additionally at least one selected from orange (above VI), violet (above IX) and green (above X), particularly the dyes having the following a value and b value in addition to the dyes of the three primary colors and black color:
Orange
(a)
 40~60
(b)
 50~80
Violet
(a)
 25~50
(b)
−45~−20
Green
(a)
−70~−40
(b)
 50~80
When these dyes are additionally used, the colors in the range of the solid line of FIG. 2B can be clearly obtained.
It is preferred to pretreat the cloth before dyeing to prevent bleeding of the dye liquid. Such a treatment is preferably made by calendering the cloth and/or by giving a water repellent finish to the cloth using a water repellent or a softening and water repellent thereby acheiving a water absorption of 5 to 240 seconds measured by JIS 1096A method or a water repellency of 50 or lower measured by JIS L-1018.
Such water repellents include, for example, fluorine compounds, silicone compounds and zirconium compounds. Such softening and water repellents include, for example, octadecylethyleneurea, zirconium acetate, polyolefine compounds, wax compounds, silicone compounds and the like. Fixing agents such as alkaline substances, e.g., sodium carbonate and sodium bicarbonate, and hydrotrope agents, e.g., urea, monomethylurea, dimethylurea, thiourea, monomethylthiourea, dimethylthiourea, formamide, dimethylformamide and dimehylacetamide may be also added to them.
Such a water repellent treatment may be carried out by using at least one compound selected from the above-mentioned water repellents and the softening and water repellents in combination with a sizing agent. Such sizing agent include, for example, water-soluble cellulose derivatives such as starch, soluble starch, water-soluble starch, water-soluble starch derivatives, carboxymethylcellulose, etherified carboxymethylcellulose, hydroxyethylcellulose and methylcellulose, gums such as sodium alginate, gum arabic, locust bean gum and guar gum, water-soluble proteins such as gelatin and glue, and water-soluble synthetic high polymers such as sodium polyacrylate, polyvinyl alcohol, polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, polyethyleneimine and quaternarized water-soluble cationic polymers. Furthermore, the bleeding of the dye liquid can be prevented by applying a breaking treatment in combination.
Particularly, it is preferred to use at least one compound selected from carboxymethylcellulose, etherified carboxymethylcellulose and sodium alginate and at least one compound selected from water-soluble acrylic resins and maleic acid resins in combination with the sizing agent mentioned above.
It is preferred that the water repellent and the sof

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