Which printing equipment are commonly used in the

2022-08-07
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What printing equipment are commonly used in leather printing technology

leather has been deeply loved by people for thousands of years, but leather has always been shown in brown and black since ancient times. With the advent of warm winter, the demand for product price adjustment announced by DuPont high performance materials division of leather fashion has become more and more prominent. The market has an increasing demand for leather printing and other leather post-processing products. The continuous technological progress of modern textile printing and dyeing industry has also provided technical support for the production of various kinds of printed leather

1. Leather printing equipment

leather comes from animals, which determines the irregularity of leather. In addition, the price of leather is high and cannot be wasted, so the leather printing equipment cannot copy the 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: of course, the first choice is manual plate lifting. It has the advantages of fast pattern change, wide adaptability and convenient color registration. However, the biggest problem with the manual lifting plate used in leather printing is the large amount of waste caused by the irregularity of the leather. The technical term is "edge pasting", which needs to be repaired with scissors. Therefore, the manual lifting plate is not used much in leather printing

the most common type of leather printing is the roller printing machine. The special roller printing machine developed by South Korea has excellent printing effect. It can print any fine pattern. The utilization rate of leather can be maximized and there is basically no waste. In addition, there are also drop molding machines, and the market competitiveness of embossing machines will be further improved

b. transfer printing equipment: transfer printing requires a paper printer and a heat transfer machine. At present, foreign countries use film instead of paper, so a film printer can also be used. The heat transfer machine is different from textiles. It requires high pressure. The normal working pressure is 20~30kg/cm2. Generally, oil pressure is used. The temperature requirement is not high. The maximum temperature is 120 degrees. 80 degrees is enough

c. auxiliary equipment: auxiliary equipment is the key equipment of the leather printing factory, which is related to the product category and market share

2. Leather printing process

a. of course, the first is dye printing. The biggest advantage of dye printing is that the hand feel is not affected. However, leather cannot withstand high temperature steaming, so the process cannot be copied from that of textiles. There are a series of dyes abroad, mainly 1:2 metal complex dyes, which can be used to print leather without steaming. However, the price of these dyes is high, and their strength is only 30-50% of that of ordinary dyes, regardless of whether you are selecting tensile testing machines or other equipment. It is very troublesome to encounter dark colors. A series of dyes are selected from textile printing dyes. They have the same fastness as imported ones. They are bright in color and high in strength. Only their fastness to light is slightly poor. They can be printed on leather and dried without steaming or washing

b. next is pigment printing, which is the largest type of leather printing. Because pigment printing can express gold and silver, with hot film, the product is ever-changing, which can maximize the expression of the noble and gorgeous characteristics of leather. Wear resistant electrode

c. transfer printing: transfer printing is the most suitable printing method for leather, which is divided into dry and wet methods according to the process. Dry transfer, mostly made of hot sol ink, printed on release paper or BOPP film, and then transferred to leather under hot pressing conditions. Wet transfer is to spray a special solution onto the leather first. Then, the dye on the transfer paper is dissolved into solution by hot pressing, and then fixed on the leather. Leather transfer printing is currently the most high-end printing method on leather. The fineness and visual effect of the pattern are not comparable to other methods. At present, foreign testing machine cylinders are introduced to have factories specializing in the production of this kind of transfer paper, and the price is 40~50 yuan/meter

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