KR960004641B1 - Method for dry transcription of leather - Google Patents

Abstract

The dry transfer printing method of a leather comprises (a) tanning the raw leather with a tanning agent i.e. chrome or tannin, (b) sorting, splitting, shaving and neutralizing the leather, (c) printing a raw decalcomania paper with a printing ink of dispersive dyestuff, surfactant, printing paste and additive by the roller printer to obtain a decalcomania paper, (d) transferring the printed pattern on the surface of the leather by the transfer printer at 200˜300deg. C and 5˜10kgf/cm2 for 5˜10sec, and (e) fatliquoring, finishing and embossing it.

Description

[Name of invention]

Dry Warrior Printing Method of Leather

Detailed description of the invention

[Field of Invention]

The present invention relates to a printing method of leather paper, and more particularly, to a dry transfer printing method of leather paper applied to leather paper by improving the dry transfer printing method, which is one of the printing methods of textile fabrics and knitted fabrics.

[Background of invention]

As a method of printing textile fabrics and knitted fabrics, various methods such as roll printing, silk screen printing, dry transfer printing, wet transfer printing or photosensitive printing have been proposed and used.However, in the case of leather, especially natural leather, It is difficult to use and only the above roll printing method or silk screen printing method has been used in a limited manner.

However, these dyeing methods have a disadvantage in that the pattern is difficult to match and the delicate pattern cannot be used due to the extension and elasticity of the leather because it is a form that uses a separate roll for each color. In addition, since the roll printing method is a form in which the pigment is bonded to the fiber surface by a binder, the touch is naturally hardened and the friction fastness of the printing is extremely poor. In addition, such roll printing or silk screen printing caused the pigment to be released during the process of steaming, soaping, and washing in the post-process, thereby causing water pollution.

The inventors of the present invention have succeeded in applying the transfer printing method used for printing textile fabrics and knitted fabrics to the printing of leather paper while researching to solve these disadvantages.

[Purpose of invention]

An object of the present invention is to provide a transfer printing method of leather paper that can be printed in a delicate pattern.

Another object of the present invention is to provide a transfer printing method of leather paper that can print a pattern composed of various colors at once.

Still another object of the present invention is to provide a transfer printing method of leather paper which can maintain a soft touch even after printing.

Still another object of the present invention is to provide a method for transferring printing of leather paper which can greatly reduce water pollution by dyeing wastewater.

[Summary of invention]

The transfer printing method of leather paper according to the present invention is an emulsion according to the conventional tanning process ( ) Preparation process and emulsion ( 1) performing a process; A second step of carrying out and neutralizing conventional sorting, splitting, saving or summing for dyeing; A third step of making the transfer paper by ink-dispersing the disperse dye and printing it on the transfer source by a roller printing machine; A fourth step of transferring the pattern printed on the transfer paper to the surface of the leather paper by a transfer printing means having a heat cylinder; It consists of the 5th process of carrying out printing-processed leather paper, drying, and post-processing.

The present invention will be described in more detail below.

The emulsion preparation process is a process which is usually performed in the tannery process as a process of dipping, lime needle, splitting, deliming, batting and degreasing of raw material blood stored by the salting method. After the tanning process is completed, the tanning process is performed to convert the leather into a leather stabilized for the purpose of use. This tanning process has an important effect on the dry transfer printing of the present invention, since the color of the leather becomes as sharp as possible after the leather printing area becomes as white as possible. There are many types of emulsions, and the most widely used emulsions include chrome or plant tannins. Chromium has a pale green or blue color after tanning, plant tannins are light brown, alum and aldehyde emulsions are white in color, and most synthetic emulsions are used to induce whitening.

In addition, the isoelectric point of leather varies according to the type of tanning during the tanning process by tanning, and the pH of neutralizing solution should be adjusted according to the isoelectric point of leather. This is because in the dry transfer printing process, temperature, concentration, osmotic pressure, and the like must be appropriately adjusted to facilitate the penetration of the dye and to uniform the dispersion. After the emulsion process is completed, sorting, splitting, shaving, etc., and neutralization are performed as usual hot color preparations.

When the dye preparation process is finished, the dyeing process of the leather is performed by dry transfer printing method. First, the disperse dye is inked together with an interfacial sulfur agent, a printing foil, and an additive, and the ink disperse dye is printed on a transfer source by a roller printing machine. To make a decal. The pattern of the transfer paper thus made is transferred by a transfer printing machine equipped with a thermal cylinder at a pressure of 5 to 10 kg / cm 2 and a transfer time of 5 to 10 seconds at a temperature of 200 to 300 ° C.

In dry transfer printing, it is desirable to bond a wick made of woven fabric, nonwoven fabric or paper to the back side of the leather to be printed in order to prevent the leather from being pushed onto the heat-cylinder roller of the transfer machine due to the elasticity and elasticity of the leather. Do. In the case of the transfer printing method by manufacturing a press-type machine instead of the heat cylinder roll, the wick attachment may be omitted. The dry transfer printing process of leather paper varies the amount of surfactant, printing foil or various additives added to the dye bath (ink) according to the type, thickness, purpose of use, and fastness of the leather fabric. Adjust to apply.

In this way, the finished leather is subjected to a general general tanning process finishing step. In the finishing stage, the product is finished by eggplanting, painting, or embossing according to the fabric characteristics and purpose of use.

Although the dry transfer printing of the present invention may be applied to a leather fabric which has been dyed to a conventional solid color in the above, the printing transfer printing of the present invention has a disadvantage of poor color fastness. In addition, the dry transfer printing method of the leather of the present invention may put various patterns and colors on the suede side in the case of the double-faced fabric fur which is used on both the hairy side and the suede side. have.

According to the present invention, when printing a combination of a plurality of transfer papers printed and manufactured in various shapes and colors on the surface to be printed on leather, it is possible to add excellent fashion to leather products. Furthermore, according to the present invention, both the grain (grain), which is the front surface of the leather fabric, and the suede, which is the rear surface, may be printed simultaneously. Leather transfer printing method of the present invention can be applied to artificial leather as well as natural leather.

As described above, according to the leather transfer printing method of the present invention, there is an advantage in that a fine pattern can be printed without restriction on color and the touch is not damaged after printing, and the effect of preventing water pollution by dyeing wastewater is also provided. have.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the scope of the present invention and that such modifications and modifications belong to the appended claims.

Claims (7)

According to the general tanning process ) Preparation process and emulsion ( 1) performing a process; A second step of carrying out and neutralizing conventional sorting, splitting, saving or samming for dyeing; A third step of making the transfer paper by ink-dispersing the disperse dye together with a surfactant, a printing foil and an additive, and printing on a transfer sheet by a roller printing machine; A fourth step of transferring the pattern printed on the transfer paper to the surface of the leather paper by a transfer printing means having a heat cylinder; Dry transfer printing method of the leather paper which consists of the 5th process of having a printed leather paper and drying and post-processing. The dry transfer printing method of claim 1, wherein the fourth process is performed at 200 to 300 ° C. at a pressure of 5 to 10 kg / cm 2 and a transfer time of 5 to 10 seconds. The method of claim 1, wherein the neutralizing step of the second step is such that the pH is higher than the isoelectric point of the leather. The method of claim 1, wherein in order to prevent the leather from being pushed to the heat cylinder type roller of the transfer machine in the fourth step, the wick made of woven fabric, nonwoven fabric or tributary is bonded to the back side of the leather to be printed. Dry Warrior Printing Method. The dry transfer printing method of the leather paper according to claim 1, wherein the press printing transfer printing means is used instead of the transfer printing means by the heat cylinder in the fourth step. The dry transfer printing method of the leather paper according to claim 1, wherein a plurality of transfer papers are printed in combination in the third and fourth processes. The dry transfer printing method of the leather paper as claimed in claim 1, wherein dry transfer printing is performed on both surfaces of the leather paper in the fourth step.