Leather printing technology equipment and technology introduction

Leather has been loved by people for thousands of years, but leather has been used in brown and black since ancient times. With the advent of warm winter, the requirements for leather fashion become more prominent. The demand for leather after-printing products such as leather printing The ever-increasing, and continuous technological progress of the modern textile printing and dyeing industry has also provided technical support for the production of strange printed leather.

1. Leather printing equipment: Leather comes from animals, which determines the irregularity of the leather. Coupled with the high price of leather, it cannot be wasted, so it was decided that leather printing equipment could not copy textile printing equipment. At present, the printing equipment in the leather industry is divided into direct printing equipment, transfer printing equipment, and some auxiliary equipment.

a. Direct printing equipment: The first choice is of course manual lifting. It has the advantages of fast pattern change, wide adaptability, and easy color registration. However, manual lifting is used for leather printing. The biggest problem is the large amount of waste caused by the irregularity of the leather. The terminology is called edging, and the last thing is to use scissors to repair it. Therefore, the manual lifting is used in leather printing. Not much.
The most common leather printing is the roller printing machine. The leather special roller printing machine developed by Korea has excellent printing effect and can print any fine pattern. The utilization rate of leather can be maximized and there is no waste. In addition, there are drop machines, embossing machines.

b. transfer printing equipment: transfer printing to a printing machine and heat transfer machine, the current foreign film instead of paper, so a film printing machine can also be. Heat transfer machine is different from textiles, it requires high pressure, normal working pressure is 20 ~ 30kg/cm2, generally with oil pressure. Temperature requirements are not high, up to 120 degrees, 80 ordinary enough.

c. Auxiliary equipment: Auxiliary equipment is a key equipment for a leather printing factory. He relates product categories and market share.

2. Leather printing process:

First of all, of course, dyestuff printing, the biggest advantage of dyestuff printing is that the hand feel is not affected. However, leather cannot withstand high temperature steaming, so the craft can not copy textiles. There are a series of dyes in foreign countries, mainly 1:2 type metal complex dyes. It is not necessary to steam and dry it, but it can be dried. However, the price of such dyes is high, and the strength is only 30% to 50 of ordinary dyes. %, it's very troublesome to get dark colors. A series of dyestuffs were selected from textile printing dyes, with a fastness comparable to that of imported ones, with bright colors, high strength, and only slightly less light fastness. They can be printed on leather and dried without steaming or washing.

b. Followed by paint printing, which is the largest type of printing in leather printing. Because paint printing can express gold and silver, coupled with hot film, the product is ever-changing, can express the leather noble, gorgeous features.

c. Transfer Printing: Transfer printing is the most suitable printing method for leather. It is divided into dry and wet methods according to the process. Dry transfer, mostly made of hot melt ink, printed on release paper or bopp film, and then transferred to leather under hot press conditions. In wet transfer, a special solution is sprayed on the leather. Then by hot pressing, the dye on the transfer paper is dissolved in the solution and fixed on the leather. Leather transfer printing is currently the most advanced type of printing on leather. The fineness of the pattern, visual effects, and other methods are comparable. At present, there are factories in foreign countries specializing in the production of such transfer paper, the price is 40 ~ 50 yuan / meter.