Water and Oil Repellency

Water Repellency refers to the state of "repelling water." This phenomenon occurs due to differences in intermolecular forces (i.e., surface tension). When the intermolecular forces (surface tension) on a solid surface are lower than that of the liquid, it results in a "good repellent" state.
Water-repellent treatment utilizes the water-repellent properties of fluororesins, silicone resins, and others to prevent moisture from adhering to the solid surface. When water droplets are placed on a surface treated with water-repellent agents, the water will be repelled, thereby preventing the surface from getting wet or water from penetrating into the material.

Oil Repellency refers to the state of repelling oil or oil-based contaminants. The purpose of oil-repellent processing is to protect and maintain the cleanliness of the object. By utilizing the oil-repellent properties of fluorine, various items such as fabrics and precision machinery can undergo oil-repellent treatment.
Typically, a surface with an oil contact angle ranging from 40 to 80 degrees is considered to have oil-repellent properties. A surface treated with Fluoro Surf, for example, exhibits a contact angle of 65 to 80 degrees (depending on the type of oil used; this value applies to lubricating oils).
On untreated surfaces, oil tends to wet the surface, spread, or even penetrate into the material. This occurs because oil has lower surface tension, and its internal cohesive forces are weaker.

Surfaces treated with fluorine coatings exhibit the lowest surface tension of any solid material in the world, and are the only surfaces capable of repelling oil. This is a unique property of fluorine-based coatings, which even materials like silicone (typically water-repellent) cannot achieve for oil repellency.
Surfaces processed with oil-repellent treatments show characteristics where oil components have difficulty adhering, and stains are less likely to form. Therefore, this can also be called "stain-resistant treatment."

In addition to treating the overall surface with oil repellency, it is also possible to apply oil-repellent treatments to specific areas where oil diffusion or leakage is a concern. For instance, oil barrier methods can effectively suppress the diffusion of silicone oil and lubricating oils.

Our product, Fluoro Surf, is based on the concept of a "liquid product that is easy to apply and dries at room temperature as a fluorine coating." It is a product that anyone can easily apply for oil-repellent processing.