Polyurethane materials, due to their excellent adhesion, flexibility and weather resistance, have become the core raw materials in two specialized fields of adhesives and ink bonding materials. They are widely used in industries such as flexible packaging, printing and composite processing, and have laid the quality foundation for high-end packaging products.
Polyurethane adhesives are the "all-rounder" in industrial bonding. They are mainly composed of isocyanate and polyol as their core raw materials, and their molecular chains are rich in polar groups, enabling strong bonding of various substrates such as metals, plastics, leather, and fabrics. They are particularly suitable for composite of different materials. Compared with ordinary adhesives, they have both toughness and strength, are resistant to low temperatures, bending, and aging, and solvent-free products can also reduce VOC emissions, which aligns with the trend of environmental-friendly production. In scenarios such as food soft packaging, automotive interiors, and building material composites, polyurethane adhesives, with their strong bonding force and stable resistance to media, have become the preferred bonding materials.
The polyurethane
Ink Binder is the "core component" of the printing ink, determining the adhesion, film-forming property and wear resistance of the ink layer. It has excellent pigment dispersion performance and can quickly wet the substrate. It can form a dense ink film on the surfaces of PET, BOPP, PA and other films, with strong adhesion, good resistance to friction and no color fading. It is suitable for high-speed printing processes. At the same time, this binder has good compatibility and can be mixed with various additives to balance the printing clarity and composite strength, meeting the hygiene and performance requirements of food packaging and label printing fields.
Nowadays, with the tightening of environmental protection policies and the upgrading of demand for high-end packaging, water-based and solvent-free polyurethane products are gradually replacing traditional solvent-based products. This not only enhances processing safety but also reduces environmental pollution. The two materials complement each other, driving the packaging and printing industry to evolve towards efficiency, greenness and high quality, and becoming indispensable key categories in the field of fine chemicals.
