Understand spray ink dispersants in one article: application scenarios and industry empowerment

Spray ink dispersants are an important ink additive. Their main function is to improve the dispersion performance of pigments and fillers in inks, prevent the agglomeration and precipitation of pigment particles, thereby improving the stability, fluidity and printing effect of inks. The following are the main application scopes of spray ink dispersants:

1. Classification by ink type

Solvent-based inks

Application scenarios: Solvent-based inks are widely used in the printing of plastic films, metal foils, paper and other substrates, such as packaging printing, label printing, etc.

Function of dispersants: In solvent-based inks, dispersants can effectively reduce the interaction force between pigment particles, prevent pigment agglomeration, and make the ink have better fluidity and stability, thereby improving printing quality and efficiency.

Water-based inks

Application scenarios: With the improvement of environmental awareness, water-based inks are increasingly used in packaging printing, publishing printing and other fields.

Function of dispersants: Dispersants in water-based inks need to have good hydrophilicity and dispersibility, be able to stabilize the dispersion state of pigment particles in water, prevent pigment precipitation and stratification, and ensure the uniformity and stability of inks.

UV ink

Application scenario: UV ink has the advantages of fast curing speed and good printing effect, and is widely used in high-end packaging, labels, electronic products and other fields.

Function of dispersant: In UV ink, the dispersant needs to adapt to the characteristics of the UV curing system to ensure that the pigment particles remain evenly dispersed during the curing process, and avoid color difference, spots and other problems after curing.

2. Classification by printing process

Offset printing

Application scenario: Offset printing is a common printing process, widely used in the printing of publications such as books, newspapers, and magazines.

Function of dispersant: In offset printing ink, dispersant can improve the transfer performance of ink, make the ink better adhere to the printing plate and substrate, and improve the printing clarity and color saturation.

Gravure printing

Application scenario: Gravure printing is mainly used for printing of substrates such as plastic film and metal foil, such as food packaging, pharmaceutical packaging, etc.

Function of dispersant: Gravure printing ink needs to have high viscosity and fluidity. Dispersant can adjust the viscosity of ink, prevent ink from flying and drawing during the printing process, and ensure printing quality.

Flexographic printing

Application scenario: Flexographic printing is an environmentally friendly printing process, widely used in packaging printing, label printing and other fields.

Function of dispersant: Flexographic ink needs to have good fluidity and drying performance. Dispersant can optimize the dispersion state of ink, improve the drying speed and printing adaptability of ink.

Screen printing

Application scenario: Screen printing is suitable for substrates of various shapes and materials, such as glass, ceramics, textiles, etc.

Function of dispersant: In screen printing ink, dispersant can ensure that pigment particles are evenly dispersed in the ink, preventing the ink from clogging the screen and uneven printing during the printing process.

3. Classification by substrate material

Paper

Application scenario: Paper is one of the most common substrates, widely used in books, newspapers, packaging boxes and other fields.

Function of dispersant: In paper printing ink, dispersant can improve the adhesion and drying speed of ink, so that the printed product has better gloss and wear resistance.

Plastic film

Application scenario: Plastic films such as PE, PP, PET, etc. are often used in food packaging, pharmaceutical packaging and other fields. Dispersant effect: According to the surface characteristics of plastic film, dispersant can improve the wettability and adhesion of ink on plastic film, improve printing quality and durability.

Metal foil

Application scenario: Metal foil such as aluminum foil and copper foil are often used in high-end packaging, electronic products and other fields.

Dispersant effect: In metal foil printing ink, dispersant can ensure the uniform distribution of ink on metal foil, improve the metallic texture and decorative effect of printed products.

Textiles

Application scenario: Textiles such as cotton, linen, chemical fiber, etc. are often used in clothing, home textiles and other fields.

Dispersant effect: In textile printing ink, dispersant can improve the permeability and adhesion of ink on textiles, so that printed products have better color vividness and washability.