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US 6,022,383 AGranted
Processes for coloring leather by an ink-jet printing method using anionic coloring agents and cationic agents, and leather products obtained therewith
AssigneeCanon Kabushiki Kaisha
InventorsNobuyuki Kuwabara, Tokuya Ohta, Yasushi Takatori, Sadayuki Sugama, Hiromitsu Hirabayashi, Yuji Akiyama, Miyuki Fujita
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Abstract
A leather coloring process for carrying out coloring on a natural leather, or a natural leather which has been subjected to degreasing. The coloring process is accomplished by ink-jet coloring on at least a partial area of the natural leather.
Claims32
A leather coloring process for forming an image on a leather, comprising the steps of:
- providing a leather;
- imparting to the leather a coloring material fixing agent comprising a mixture of a cationic high-molecular weight substance having a molecular weight of not less than 2,000 to not more than 200,000 and a cationic low-molecular weight substance having a molecular weight of not more than 1,000, as essential elements, capable of reacting with the coloring material and permeable into the leather;
- and
- applying to said leather a liquid ink containing an anionic coloring material, by an ink-jet printing method.
1 more element
A leather coloring process for forming an image on a leather with an ink containing an anionic coloring material, comprising the steps of:
- providing a leather;
- imparting to a surface of the leather a cationic ink permeation controlling agent capable of reacting with a coloring material of the ink, wherein said cationic ink permeation controlling agent is selected from the group consisting of hydrochloride of lauryl amine, hydrochloride of coconut amine, hydrochloride of stearyl amine, hydrochloride of rosin amine, acetate of lauryl amine, acetate of coconut amine, acetate of stearyl amine, acetate of rosin amine, lauryltrimethylammonium chloride, lauryldimethylbenzylammonium chloride, benzalkonium chloride, cetylpyridinium chloride, cetylpyridinium bromide, 2-heptadecenyl-hydroxyethylimidazole, dihydroxyethylstearylamine, polyallylamine salt, polyallylsulfone, dimethyldiallylammonium chloride, polyamine sulfonate and polyvinylamine salt;
- applying the ink to the surface of the leather by an ink-jet printing method to form an image;
- and
- imparting to the surface of the leather on which an image has been formed, a coloring material fixing agent capable of reacting with the coloring material of the ink.
2 more elements
Dependencies are inferred from the claim text.