Kumipinnoite

Kumipinnoite, or rubber coating, refers to a coating material and process in which a rubber layer is applied to a surface to improve protection and functionality. The coating is typically formed by dipping, brushing, or spray application, followed by curing that crosslinks the rubber matrix, often through vulcanization. It can adhere to metals, plastics, and composites, and uses natural rubber or various synthetic rubbers such as SBR, NBR, CR, EPDM, silicone, or fluorinated elastomers, chosen for chemical resistance, temperature tolerance, and flexibility.

Applications include corrosion and abrasion protection for metal parts (pipes, tanks, fasteners), seals and gaskets, electrical insulation, vibration damping, and waterproofing of electronics housings, automotive components, and industrial equipment. Coating thickness generally ranges from tens of micrometers to several hundred micrometers, with thicker layers used in harsher environments.

Key properties of kumipinnoite are adhesion to the substrate, elasticity, abrasion resistance, chemical resistance, and temperature performance. Successful use depends on proper surface preparation, including cleaning and roughening to promote adhesion. Common tests assess adhesion (cross-cut or pull-off tests), hardness, abrasion resistance, and chemical compatibility.

Advantages of rubber coatings include improved wear resistance, chemical protection, sealing, and damping of vibrations. Limitations may involve limited high-temperature stability for certain rubbers, UV sensitivity, and potential degradation under prolonged exposure to aggressive solvents or extreme conditions. Kumipinnoite is selected based on the specific service environment and substrate.