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- Processes such as coating base materials with a water-based paint/coating or saturating base materials in a water-based reactive solution are common to many industries. However, due to the extremely high surface tension of water, quick wetting of an object with an aqueous liquid is much more difficult than expected.
Wetting and penetrating agents are additives used for wetting or penetrating an object with water. These agents lower the surface tension of the aqueous liquid as well as the contact angle with the base material and facilitate wetting and penetration during the coating and dipping process.
Wetting and penetrating agents are types of surfactants that generally have easily foaming properties. However, we have plenty of low foaming wetting/penetrating agents, which provide improved wetting due to their lack of foam-related troubles.
Wetting Agents for Coating
To get a quick and uniform finish on a coating material, it is important to control the contact angle and surface tension during the coating application. Wetting agents lower the contact angle and surface tension by orientating towards the object’s surface. However, it is especially important that wetting agents for coating be able to lower surface tension (dynamic surface tension reduction) immediately, by orientating themselves towards the newly generated coating surface in tens or hundreds of milliseconds.
While generic wetting agents are poor at dynamic surface tension reduction, we offer types that excel in this property and, with added low-foaming features, are ideal for high-speed coating.
These accelerate chemical penetration in the cracks and gaps of paper fiber, fabric, wood chips, and more and improve production process efficiency.