6.8 Solvent-based adhesives
6.9 Water-Based Adhesive
Water-based adhesive technology is an environmentally friendly adhesive formulation. It contains no VOCs, which means that water-based adhesives are not harmful to people or the environment. They are developed using a combination of water, polymers and additives. The additives are used to impart a certain performance to the product, for example, flexibility, cold resistance (to avoid freezing at temperatures below 0°C (32°F)), wettability, tack and fast drying. These types of adhesives are ideal for porous or non-porous substrates. Water-based adhesives form a bond between two substrates once the water within the formulation evaporates or gets absorbed into the substrate, leaving the adhesive behind. This process makes them a popular choice for bonding porous substrates.
Water-based adhesives contain insoluble resins which are finely distributed as solid particles in water. These adhesives form a bond as the water evaporates from the bond line, which greatly improves the resistance of the bonded joint against water and heat. These adhesives contain no solvents or other hazardous chemicals. Dispersion adhesives are applied by rollers or manual guns. The curing speed of the adhesives can be accelerated through the application of heat and air ventilation.
- eco-friendly and non-toxic
- easily recyclable
- safe to handle
- do not need to be heated before use
- easy to clean with water