Method of dry transfer printing of synthetic fibrous material with disperse dye and transfer paper

Abstract

A transfer paper which comprises a transfer paper base and a disperse dye ink printed thereon or imparted thereto. The transfer paper is used in a dry transfer printing method in which the transfer paper is pressed against a synthetic fibrous material with heating to thereby transfer the dye (pattern) from the transfer paper to the fibrous material. The transfer paper is characterized in that the transfer paper base has a releasant layer comprising a synthetic resin soluble in organic solvents and an ink-receiving layer made from a mixture comprising a hydrophilic synthetic resin which softens or melts upon heating, a hydrophilic binder, and various aids, the ink-receiving layer being superposed on the releasant layer. With this transfer paper for dry transfer printing, a highly fine pattern can be printed with excellent reproducibility. Furthermore, the transfer paper enables quick delivery by so-called printing without platemaking. The method of dry transfer plating employs this transfer paper.

1 . A transfer paper for dry transfer printing made by printing or applying a disperse dye ink on an uncolored transfer paper,
 wherein the uncolored transfer paper comprises a release agent layer composed of an organic solvent-soluble synthetic resin, and an ink receiving layer composed of a mixture of a hydrophilic synthetic resin, hydrophilic paste, and various auxiliaries that soften or melt by heating, and the ink receiving layer is stacked over the release agent layer.   
   
   
       2 . The transfer paper for dry transfer printing according to  claim 1 , wherein a mixing ratio of the hydrophilic synthetic resin and the hydrophilic paste contained in the ink receiving layer is in a range of 1 to 50 parts by weight of hydrophilic paste against 100 parts by weight of hydrophilic synthetic resin. 
   
   
       3 . The transfer paper for dry transfer printing according to  claim 1  or  2 , wherein the auxiliary serves as a pH adjuster. 
   
   
       4 . The transfer paper for dry transfer printing according to  claim 3 , wherein the pH adjuster is selected from substances composed of an organic acid alone, a salt of organic acid or a salt of inorganic acid, and which are intrinsically acid or can be acidified by heating. 
   
   
       5 . The transfer paper for dry transfer printing according to  claim 1 , wherein the disperse dye ink is a non-sublimation type disperse dye ink. 
   
   
       6 . The transfer paper for dry transfer printing according to  claim 1 , wherein the auxiliary is one or a mixture of two or more selected from a pH adjuster, a surface tension reducer, a thickening agent, a moisture retainer, a foil transfer binder, a color depth agent, an antiseptic agent, an antifungal agent, an anti-static agent, a sequestering agent and a reduction inhibitor. 
   
   
       7 . The transfer paper for dry transfer printing according to  claim 1 , wherein the organic solvent-soluble synthetic resin used for the release agent layer is one or a mixture of two or more selected from a silicone resin, a fluorine resin, a polypropylene resin, a polyethylene resin, an acrylic resin, an alkyd resin, a polyamide resin, a phenol resin, a stearic acid resin and a polyester resin. 
   
   
       8 . The transfer paper for dry transfer printing according to  claim 1 , wherein the hydrophilic synthetic resin that softens or melts by heating is one or a mixture of two or more selected from a water-soluble polyester resin, a water-soluble urethane resin, a water-soluble urethane-modified ether resin, a water-soluble polyvinylalcohol-modified resin, a water-soluble acrylic acid-based resin and a water-soluble polyethylene oxide resin. 
   
   
       9 . The transfer paper for dry transfer printing according to  claim 1 , wherein the hydrophilic paste is one or a mixture of two or more selected from a natural gum paste (etherized tamarind gum, etherized locust bean gum, etherized guargum, acacia arabica gum, etc.), a cellulose derivative paste (etherized carboxymethyl cellulose, hydroxyethyl cellulose, etc.), a modified starch paste (etherized starch, esterized starch), a water-soluble synthetic paste (polyacrylic acid salt, polyvinylalcohol, etc.), and a seaweed paste (sodium alginate). 
   
   
       10 . A method of dry transfer printing, comprising printing or applying a disperse dye ink on an uncolored transfer paper thereby forming a transfer paper; press-heating the transfer paper closely superposed on a synthetic fiber material thereby transferring the disperse dye ink to the synthetic fiber material; and performing a fixing process;
 wherein the uncolored transfer paper comprises a release agent layer composed of an organic solvent-soluble synthetic resin and an ink receiving layer, that soften or melt by heating, composed of a mixture of a hydrophilic synthetic resin, hydrophilic paste, and various auxiliaries, and the ink receiving layer is stacked over the release agent layer.   
   
   
       11 . The method of dry transfer printing according to  claim 10 , wherein a mixing ratio of the hydrophilic synthetic resin and the hydrophilic paste contained in the ink receiving layer is in a range of 1 to 50 parts by weight of hydrophilic paste against 100 parts by weight of hydrophilic synthetic resin. 
   
   
       12 . The method of dry transfer printing according to  claim 10  or  11 , wherein the auxiliary serves as a pH adjuster. 
   
   
       13 . The method of dry transfer printing according to  claim 12 , wherein the pH adjuster is selected from substances composed of substances composed of an organic acid alone, a salt of organic acid or a salt of inorganic acid, and which are intrinsically acid or can be acidified by heating. 
   
   
       14 . The method of dry transfer printing according to  claim 10 , wherein the disperse dye ink is a non-sublimation type disperse dye ink. 
   
   
       15 . The method of dry transfer printing according to  claim 10 , wherein the fixing process is a wet fixing process (steaming process). 
   
   
       16 . The method of dry transfer printing according to  claim 15 , wherein the temperature of the wet fixing process (steaming process) is set in a range of 90 to 180°. 
   
   
       17 . The method of dry transfer printing according to  claim 10 , wherein the auxiliary is one or a mixture of two or more selected from a pH adjuster, a surface tension reducer, a thickening agent, a moisture retainer, a foil transfer binder, a color depth agent, an antiseptic agent, an anti-static agent, a sequestering agent and a reduction inhibitor. 
   
   
       18 . The method of dry transfer printing according to  claim 10 , wherein the organic solvent-soluble synthetic resin used for the release agent layer is one or a mixture of two or more selected from a silicone resin, a fluorine resin, a polypropylene resin, a polyethylene resin, an acrylic resin, an alkyd resin, a polyamide resin, a phenol resin, a stearic acid resin and a polyester resin. 
   
   
       19 . The method of dry transfer printing according to  claim 10 , wherein the hydrophilic synthetic resin that softens or melts by heating is one or a mixture of two or more selected from a water-soluble polyester resin, a water-soluble urethane resin, a water-soluble urethane-modified ether resin, a water-soluble polyvinylalcohol-modified resin, a water-soluble acrylic acid-based resin and a water-soluble polyethylene oxide resin. 
   
   
       20 . The method of dry transfer printing according to  claim 10 , wherein the hydrophilic paste is one or a mixture of two or more selected from a natural gum paste (etherized tamarind gum, etherized locust bean gum, etherized guargum, acacia arabica gum, etc.), a cellulose derivative paste (etherized carboxymethyl cellulose, hydroxyethyl cellulose, etc.), a modified starch paste (etherized starch, esterized starch), a water-soluble synthetic paste (polyacrylic acid salt, polyvinylalcohol, etc.), and a seaweed paste (sodium alginate). 
   
   
       21 . The method of dry transfer printing according to  claim 10 , wherein the synthetic fiber material is selected from a woven fabric, a knitted fabric or a nonwoven cloth made from a synthetic fiber material or a semi-synthetic fiber material such as polyester, triacetate, diacetate, polyamide or polyacrylic, or a mixed spun fabric, a combined weave or a composite fabric of the synthetic fiber material or semi-synthetic fiber material containing a natural fiber material. 
   
   
       22 . A synthetic fiber material subjected to a transfer printing under the dry transfer printing method according to  claim 21 .