Coating processes – With post-treatment of coating or coating material – Heating or drying
Reexamination Certificate
1998-07-10
2001-04-10
Yamnitzky, Marie (Department: 1774)
Coating processes
With post-treatment of coating or coating material
Heating or drying
C427S301000, C427S341000, C427S342000, C427S389900, C347S105000, C442S060000, C442S108000, C428S311110, C428S365000
Reexamination Certificate
active
06214417
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a cloth, and particularly, to a cloth for ink-jet printing, a method of fabricating the same and further to a process of ink-jet printing using the same, wherein clear-cut printed images can be obtained thereon without ink passing through gaps between fibers, even if the cloth is a cloth of a loose texture (referred to hereinafter as a low density cloth) such as a low density woven or knitted fabric, and the like.
2. Description of the Related Art
For an ink jet printing, a so-called pretreatment process wherein an ink-receiving layer is provided on a cloth, and also, an improvement in the ink itself have been put into practice in an attempt to obtain clear-cut images without ink bleeding.
There have been developed, for example, a cloth wherein an ink-holding layer composed of a non-dyeable material selected from the group consisting of a water-soluble polymer, water-soluble salts, and water-insoluble organic fine particles is formed to absorb discharged ink for temporarily holding the ink therein so that the ink can be prevented from bleeding, and a method of dyeing the same (Japanese Patent Publication No. S63-31594), a method of ink-jet dyeing whereby ink blended with a gelling and sizing agent is injected onto a fiber structure pretreated with a gelling agent (Japanese Patent Publication No. S63-52151), and a printing process wherein a first compound contains a gel-forming species while a second compound contains a gelling initiation species, and at least either of the compounds contains a coloring agent such that the bleeding of color can be inhibited between adjacent coloring regions in the respective compounds (Japanese Patent Laid-open Publication No. H8-209049).
All of these conventional techniques, however, have been found effective for a cloth such as a woven or knitted fabric fabricated of threads with a weight fineness of not less than about 150 denier (d), a close-woven or close-knitted fabric (high density fabric) of a warp density of not less than about 120 warps/inch, or a filling density of not less than about 150 fillings/inch, and the like but not so effective for a low density cloth such as a woven or knitted fabric fabricated of threads with a weight fineness of less than about 150 denier (d), a relatively coarse-woven or coarse-knitted fabric of a warp density of less than about 120 warps/inch, or filling density of less than about 150 fillings/inch, and the like.
More specifically, there has arisen a problem that ink passes through gaps between fibers before achieving an object of obtaining clear-cut images without ink bleeding.
More particularly, when conventional ink-jet dyeing methods are applied to a low density cloth having large gaps between the fibers thereof, only a small portion of the ink injected on the surface of the cloth stays on the fibers, allowing a greater part of the ink to pass through (strike through) the gaps between the fibers.
This renders the ink utilization ratio very low, and more importantly, creates a cumbersome problem of the ink passing through the gaps between the fibers reaching and contaminating (stains) the surface of a drum for holding the cloth, thereby causing the ink remaining on the surface of the drum to contaminate a newly arrived cloth.
Therefore, preventing ink from passing through the gaps has been an important issue.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide a cloth for ink-jet printing, a method of fabricating the same and further, to a process of printing the same, wherein clear-cut images can be printed thereon without causing the ink to pass therethrough and the cloth to be stained, even when an ink-jet process is applied, particularly, to a low-density cloth such as a coarse-woven, coarse-knitted fabric or the like.
The invention has been provided to solve the aforesaid problems as described hereinafter.
An object of the invention is to provide a cloth for ink-jet printing, obtained by providing a low-density cloth with a sizing agent of a gel-transition type (sizing agent capable of transition from a sol to a gel state), gelling agent, and ink-holding agent to fill up the gaps between the fibers, and by drying the low-density cloth (1).
Another object of the invention is to provide the cloth for ink-jet printing according to (1) above, wherein the low-density cloth is a cloth fabricated of threads with a weight fineness of not more than 150 d(2).
A still further object of the invention is to provide the cloth for ink-jet printing according to (1) above, wherein the low-density cloth is a woven or knitted fabric of a warp density of not more than 120 warps/inch, or a filling density of not more than 150 fillings/inch (3).
A further object of the invention is to provide the cloth for ink-jet printing according to (1), (2), or (3) above, wherein the sizing agent of the gel-transition type is one type or not less than two types of sizing agents of the gel-transition type selected from the group consisting of a water-soluble cellulose substance such as carboxymethyl cellulose, a polysaccharide such as sodium alginate, gum arabic, and locust bean gum, and a water-soluble synthetic polymer such as polyvinyl alcohol, polyalkylene oxide, and water-soluble acrylic resin (4).
A still further object of the invention is to provide the cloth for ink-jet printing according to (1), (2), or (3) above, wherein the gel-initiating agent is one type or not less than two types of gelling agents selected from the group consisting of calcium chloride, potassium chloride, barium chloride, magnesium chloride, stannous chloride, stannic chloride, cupric chloride, calcium hydroxide, aluminum sulfate, zinc sulfate, chromium nitrate, silver nitrate, aluminum acetate, ferrous sulfate, ferric chloride, boric acid, borax, tannic acid, and the like (5).
A yet further object of the invention is to provide a method of fabricating a cloth for ink-jet printing, comprising the steps of filling up gaps between fibers by providing a low density cloth with a sizing agent of the gel-transition type, gelling agent, and ink-holding agent, and drying the low-density cloth (6).
Further, an object of the invention is to provide a method of fabricating a cloth for ink-jet printing, comprising the steps of filling up the gaps between the fibers by providing a low-density cloth with a gelling agent first, and with a treatment agent containing a sizing agent of the gel-transition type and an ink-holding agent thereafter, and drying the low-density cloth (7).
Another object of the invention is to provide a method of fabricating a cloth for ink-jet printing, comprising the steps of filling up gaps between the fibers by providing a low-density cloth with a gelling agent, sizing agent of the gel-transition type, and an ink-holding agent, in sequence, and drying the low density cloth (8).
Still another object of the invention is to provide a method of fabricating a cloth for ink-jet printing, comprising the steps of filling up gaps between fibers by providing a low density cloth with a sizing agent of the gel-transition type first, and with a treatment agent containing a gelling agent and ink-holding agent thereafter, and drying the low density cloth (9).
A further object of the invention is to provide a method of fabricating a cloth for ink-jet printing, comprising the steps of filling up gaps between the fibers by providing a low density cloth with a sizing agent of the gel-transition type, gelling agent, and ink-holding agent, in sequence, and drying the low density cloth (10).
A still further object of the invention is to provide a process of ink-jet printing a cloth for ink-jet printing, fabricated by providing a low density cloth with a sizing agent of the gel-transition type, gelling agent, and ink-holding agent to fill up gaps between the fibers, and by drying the low density cloth, whereby a pattern is ink-jet printed thereon, and the dye fixed thereon (11).
A yet further object of the invention is to provide the process of ink-jet p
Makita Hiroyuki
Oobayashi Naohiro
Watanabe Ichiei
Yamada Saiko
Flynn ,Thiel, Boutell & Tanis, P.C.
Seiren Co., Ltd.
Yamnitzky Marie
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