Bleaching and dyeing; fluid treatment and chemical modification – Process of printing permanently on substrate – other than...
Reexamination Certificate
2001-09-05
2003-09-23
Einsmann, Margaret (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Process of printing permanently on substrate, other than...
C008S532000, C008S582000, C008S586000, C008S595000, C008S617000, C008S930000, C008S543000, C008S552000, C008S445000, C008S499000, C008S495000
Reexamination Certificate
active
06623532
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method of ink-jet printing fabric composed of synthetic and cellulose fibers and ink-jet printed goods obtained by the ink-jet printing method.
BACKGROUND OF THE INVENTION
Certain techniques are known for allowing fabric composed of polyester and cellulose fibers to be generally dyed with good color fastness by using disperse and reactive dyes. In the meantime, it is already known as prior art that polyester fiber fabric can be generally dyed with disperse dyes using an ink-jet system by treating the fabric with an acidic solution before its ink-jet dyeing.
According to the prior art, a similar ink-jet dyeing system is also applied to cellulose fiber fabric, provided that the fabric is treated with an alkaline solution before its ink-jet dyeing.
However, the application of this prior art system to fabric composed of synthetic and cellulose fibers presents a problem; if the fabric is treated with an alkaline solution before its ink-jet dyeing with more consideration given to the reactive dyes in the ink for its cellulose component, the disperse dyes in the ink for its synthetic component become unstable on it due to its alkalinity, resulting in difficulty in allowing it to be dyed with good reproducibility of its coloration.
If, conversely, the fabric is treated with an acidic solution before its ink-jet dyeing with more consideration given to the disperse dyes in the ink for its synthetic component, the reactive dyes in the ink applied to it are adversely affected by its acidity with deterioration in their affinity for its cellulose component, resulting in difficulty in providing it with a satisfactory color shade depth.
In order to solve the above-mentioned problem, studies have been conducted on the feasibility of ink-jet dyeing such fabric in two processes, although it has not yet been put to practical application because of it involves problems such as high cost and poor reproducibility.
As another approach toward the solution of this problem, researches have been undertaken for the development of alkali-resistant disperse dyes and reactive dyes capable of dyeing cellulose fiber in an acidic pH range, although none of such dyes currently available are satisfactory in their color shade depth and brilliancy.
As specific examples of the above-mentioned approach, Japanese Patent JP-A-56-4784 has disclosed a method of dyeing cellulose fiber fabric using a dye containing one or more S-triazinyl groups with a quaternary nitrogen substituent, eliminating the need for use of an acid binding agent.
As another such example, Published Japanese Patent Application JP-A-58-186682 discloses a method of dyeing cellulose fiber fabric using a dye containing one or more S-triazinyl groups with nicotinic acid in a pH range from weakly acidic to alkaline.
Similarly, JP-A-5-209375 discloses a method of dyeing cellulose fiber fabric using a dye containing one or more S-triazinyl groups with a pyridine derivative in a pH range from weakly acidic to neutral.
All of these methods are based on the use of a reactive dye containing a triazinyl group with a substituent introduced into it to accomplish dyeing of cellulose fiber by conventional printing and exhaustion dyeing methods.
However, the mere application of any such method to ink-jet printing of fabric composed of synthetic and cellulose fibers has been confirmed to result in failure to print it with satisfactory color shade depth, brilliancy and uniformity.
OBJECT OF THE INVENTION
It is therefore an object of the present invention to solve the above-mentioned problems of the prior art and thus to provide a method of applying ink containing dyes to fabric composed of synthetic and cellulose fibers using an ink-jet system to print the fabric with high color shade depth and brilliancy and ink-jet printed goods obtained by the ink-jet printing method.
SUMMARY OF THE INVENTION
The present invention has the following constitutions to achieve the above-mentioned objects;
In the first aspect, the present invention resides in a method of ink-jet printing fabric composed of cellulose and synthetic fibers using reactive and disperse dyes, comprising treating the fabric with an acidic aqueous dispersion containing cellulose reactive compound, water-soluble polymer and non-water-soluble inactive organic compound with a melting point of 40° C.-150° C. and drying it before its ink-jet printing.
In the second aspect, the present invention resides in an ink-jet printing method as specified in the first aspect of the present invention, wherein said cellulose reactive compound is a nitrogen-containing organic compound.
In the third aspect, the present invention resides in an ink-jet printing method as specified in the first or second aspect of the present invention, wherein said cellulose reactive compound is an alicyclic or aromatic compound with one or two nitrogen atoms as its ring member.
In the fourth aspect, the present invention resides in an ink-jet printing method as specified in one of the first to third aspects of the present invention, wherein said cellulose reactive compound contains at least one compound selected from pyridine carboxylic acid and pyridine carboxylic acid amide compounds.
In the fifth aspect, the present invention resides in an ink-jet printing method as specified in one of the first to fourth aspects of the present invention, wherein said non-water-soluble inactive organic compound contains at least one compound selected from hydrocarbon wax, fatty acid amide and polyhydric alcohol fatty acid ester compounds.
In the sixth aspect, the present invention resides in an ink-jet printing method as specified in one of the first to fifth aspects of the present invention, wherein said synthetic fiber is polyester or acetate fiber.
In the seventh aspect, the present invention resides in ink-jet printed goods obtained by an ink-jet printing method as specified in one of the first to sixth aspects of the present invention.
REFERENCES:
patent: 4767420 (1988-09-01), Mehl et al.
patent: 5498267 (1996-03-01), Russ et al.
patent: 5820661 (1998-10-01), Gregory et al.
Nakamura Shungaku
Yamazaki Ayumi
Dilworth & Barrese LLP
Einsmann Margaret
Seiren Co., Ltd.
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