The Trend Of Environmental Protection Is Rising, The Mainstream Of Eco Textile Technology.

< p > at present,.Ciba.Dupont, BASF and other companies have special ink supply for inkjet printing. Besides the characteristics of ink, the quality of inkjet printing is affected. In terms of equipment, the main parts are sprinklers, droplets size, nozzle density, accuracy, calibration, speed, etc. the software is mainly color matching, color separation, PIP process, and so on.

The ink jet printing of fabrics should be processed before and after treatment.

After treatment, there are steaming, washing, drying and special finishing.

Digital inkjet printing technology is widely used in modern textile industry. It involves clothing, interior decoration, commercial use, < a href= "http://cailiao.sjfzxm.com/Matertial/show/machine_index.aspx" > textile > /a > products, industrial textiles, down products, jewelry, handicrafts and other fields.

Further development of fully automatic, full-color, high efficiency continuous digital inkjet printing equipment will become the most satisfactory textile printing ecology < a href= "http://www.91se91.com/news/index_h.asp" > environmental protection < /a > production technology.

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< p > < strong > 1.3 droplet or continuous digital inkjet printing < /strong > /p >

< p > digital inkjet printing is divided into on-demand drip ink jet printing (DOD) and continuous inkjet printing (cIJ) N type.

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< p > < strong > 1.3.1 1.3.1 on demand inkjet printing > /strong > /p >

< p > drop drop ink jet printing (DOD) system requires only one drop of ink when printing is needed. Four kinds of pigment (CMYK) are controlled by a computer, and a droplet of ink is sprayed to the set pattern at the same time. Its greatest characteristic is to spray when needed.

This is also known as micro bubble inkjet printing. The inkjet printing can be divided into four types: thermal inkjet (thermal pulse), piezoelectric, valve sprayed (solenoid) and electrostatic.

At present, thermal inkjet and piezoelectric applications are the most widely used.

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< p > (1) thermal inkjet printing: thermal inkjet printing relies on thermal pulse to produce ink spots (Boiling Spray).

The advantage of thermal inkjet technology is the low cost of the nozzle. However, because the temperature needed for spewing the droplets is as high as 350 degrees Celsius, it causes the ink to break down, which leads to the deposition and blockage of the nozzle.

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< p > (2) piezoelectricity: piezoelectric inkjet < a href= "http://www.91se91.com/news/index_c.asp" > printing > /a > three types, including ink type, hot melt type and droplet type. The principle is to add a potential on a piezoelectric material to compress the material in the direction of electric field and expand in the vertical direction, so that the ink dripping out.

Its cycle is higher than that of thermal inkjet technology. The droplet volume is smaller than that of thermal inkjet. Its greatest advantage is that the nozzle life is about 100 times longer than that of the thermal inkjet nozzle.

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< p > (3) valve injection: also known as air jet, its principle is that the computer controls multiple switches. When the switch is opened, compressed air is ejected, and the ink is sucked up and sprayed out.

Because the solenoid valve switching frequency is limited (150Hz), the pressure of the ink is only O.1MPa., resulting in the ink droplet injection speed is too low (1-2m/s), the printing speed is not high, the highest accuracy is only 25dpi.

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< p > (4) electrostatic type: conductive ink is needed. Voltage is added between the nozzle and the valve electrode, so that the droplet is sucked out from the nozzle and moves toward the valve electrode. The fabric in motion will be printed into a pattern, and the volume of its droplet will be related to the applied pulse voltage.

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< p > < strong > 1 and 3.2, continuous inkjet printing < /strong > /p >

< p > continuous ink-jet printing means that the ink is pushed by compressed air around 300kPa. Through the small nozzle of diameter 1O to 100p and m, regular and controlled droplets are formed. After the droplet is generated, it needs to be selectively controlled to form the image control droplet. The most commonly used method is electro deflection, and the electric field is used to control the charged or uncharged droplets. The other way is to control the droplets in the printing continuous ink-jet technology. Another way is to deflect the air deflections. The compressed air is dripped out by the valve to print on the fabric, the droplets are larger and the color is not mixed, but the resolution is low.

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< p > < strong > 1.4 the quality of digital inkjet printing is less than /strong > /p >

< p > ink for inkjet printer is divided into three categories: water based ink, oil soluble ink and fixed ink.

Water based ink is also divided into dye, emulsion and pigment types.

Commonly used water-based ink for textile inkjet printing machines. It is composed of deionized water, water-soluble organic solvents, coloring agents and related auxiliaries. Water soluble organic solvents are usually alcohols. It can improve the solubility of dyes and ink stability, so that they have suitable surface tension and viscosity.

Colorants are water-soluble dyes. They require good stability, color reduction, light fastness and water resistance. They also ensure that they have higher optical density, good friction, washability and fastness to light.

At present, the ink used for digital inkjet printing mainly includes pigments, reactive dyes, disperse dyes, acid dyes, direct dyes and so on.

Ink should have the following characteristics: < /p >

< p > (1) has a pure color; < /p >

< p > (2) ink viscosity, surface tension, pH value and fluidity should be suitable; < /p >

< p > (3) using the correct chemical composition; < /p >

< p > (4) has the suitable drying time; < /p >

< p > (5) is not suitable for vaporization; < /p >

< p > (6) has super conduction property; < /p >

< p > (7) has stability and reliability suitable for sprinkler head; < /p >

< p > (8) has high color fastness.

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