Analysis of the application of water based screen printing ink in textile printing process:
At present, water-based screen printing inks are mainly used in flexible and intaglio printing, most of these two kinds of printing are for food packaging, tobacco and alcohol, pharmaceutical and childrens toys, which occupy a considerableAt present, water-based screen printing inks are mainly used in flexible and intaglio printing, most of these two kinds of printing are for food packaging, tobacco and alcohol, pharmaceutical and children's toys, which occupy a considerable market.
The water based screen printing ink ingredients
Water-based screen printing ink was made from the water-based resin, paint, solvent processing by the composite grinding. The water-soluble resin mainly act as a connecting material, distribute the paint evenly, to make the ink has a certain amount of fluidity, to produce adhesive force with substrate material, make the ink form a uniform film layer after printing.
The characteristics of water-based screen printing ink
1. water-based screen printing ink is a good adhesion, good flexibility, good elasticity, anti-sticky, washable, printing performance and mesh passage capacity are all good and high solid content of new environmental printing ink.
2. Non - flammable, ink - stable, non - corrosive printing substrate, anti - migration, water - resistant, fast drying. It can not only reduce the hidden dangers caused by static electricity and flammable solvents, but also reduce the residual toxicity on the printing surface. And it is convenient to clean the printing equipment, so it is especially used in the food, beverage and pharmaceutical packaging industries.
3. water-based screen printing ink contents the water and a small amount of alcohol, in the products with directly contact with the body such as: T-shirts and other cotton, elastic fabrics, insoles printing industry also has a very wide range of usage.
The instruction of the water-based screen printing ink
Suitable mesh count: 40T-100T (water-based screen printing version)
Suitable screen printing squeegee: recommend to use 65-70 degree polyester squeegee or water-based plastic squeegee
Coating area: 25-35 square meters / kilogram
Diluent: Neutral water
Screen plate washing water: ordinary tap water
The deployment requirements of water-based screen printing ink
Before using, according to different printing requirements, the ink viscosity should be adjusted properly, notice that added the water to made it as neutral as possible when adjusting, otherwise it will affect the viscosity and drying speed of the ink. Meantime, the amount of diluent(water) could not more than 3%, otherwise it may reduce the ink color density.
The printing requirements of the water-based screen printing ink
Because of its own characteristic of the water-based screen printing ink, the ink drying speed is difficult to control, it should printing fast when printing, slow printing speed are easily lead to the ink dry quickly and block the mesh screen.
The drying requirement of the water-based screen printing ink
Usually the water-based screen printing ink is natural drying, after 8 hours of natural drying, bake with 130 degrees for about 1 minute will have better drying effect.
The auxiliaries using of water-based screen printing ink
Slow dry agent: used to reduce the ink drying speed, the amount can not exceed 5%.
Defoaming agents: used to eliminate bubbles, the amount should between 0.5-2%.
Thickening agent: used to increase the resin viscosity, to make the ink reach proper viscosity.
Water-based screen printing ink precautions before use
1. water-based screen printing ink can not be mixed with the solvent-based ink, or in the water-based ink to join benzene, esters, ethers, ketones organic solvents.
2. water-based screen printing ink should be stored indoors, the temperature is 5-40 degrees, to avoid direct sunlight.
3. long-term storage of ink will have a gel-like, it need to be full mixing when using.
4. due to the complexity and persity of the current printing substrate, so before to choice a certain ink to bulk production, it needs to do a rigorous prenatal test according to the actual production.
5. unused ink sealed in time to prevent the ink status.
6. after the deployment of water-based screen printing ink defibrillators need to be set aside, otherwise the ink layer will have bubbles or pinholes.
7. rinse immediately after printing, or it will easy to plug the mesh after drying, you can increase the thickness of the screen to reduce the ink block on the mesh screen.
8. when stop printing in a short time, you should cover a layer of ink immediately, otherwise it may lead to block easily.
Product classification and use range of water-based screen printing ink
WG-LA Lycra Series: is a good adhesion, yellowing resistance, flexibility, water resistance, printing performance and ink permeability are very good and high solid content of the new environmentally friendly printing inks, Lai Kabu, high elastic cotton, sponge Cloth, all kinds of cotton cloth, cotton cloth and T / C cloth.
Applicable industries: toys, clothing, sports equipment production.
WG-TD specific Lycra series: is a good adhesion, high solids, high elasticity (elastic elongation of 200%), high washable (washing powder, salt water, 60 degrees, more than 120 minutes) of good products , Mainly used in Lai Kabu, knitted fabrics and other highly elastic textile.
Applicable industries: toys, clothing, sports equipment production.
WG-PVC series: mainly for PVC, PU, TPU, leather, ordinary nylon cloth, treated with plastic, EVA, PEVA, cloth and other materials printing.
Application industries: toys, clothing, printing, umbrellas, shoes, handbags, sports equipment.
WG-PU series: Multi-purpose products, suitable for PU, TPU, PVC and other leather, ordinary nylon cloth, processed such as plastic, PEVA, cloth and other substrate printing, especially in leather applications more. In PVC, PU has good adhesion, yellowing resistance, high temperature, wear-resistant.
Application industries: toys, clothing, printing, umbrellas, shoes, handbags, sports equipment.
WG-NY Nylon Series: mainly for ordinary nylon cloth printing, good adhesion, yellowing resistance, high temperature, abrasion resistance, water resistance, good printing.
Application industry: Garment, printing, umbrellas, shoes, handbags and so on.
WG-EVA Series: The main substrate for the EVA, anti-yellowing, high temperature, good adhesion, non-corrosive substrates. At the same time, it can also printing in some PU, TPU, leather, cotton, chemical fiber cloth and other materials.
Application industries: toys, clothing, printing, umbrellas, shoes, handbags, sports equipment, etc.
screen printing ink water based screen printing ink
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