Resincoated

Resin-coated is a term used to describe a material surface that has been coated with a polymer resin to form a protective or functional film. The coating is typically a thin layer of resin such as phenolic, epoxy, polyurethane, acrylic, or melamine, applied by spraying, dipping, or in-situ polymerization, and then cured by heat or UV to cross-link and harden. The coating serves to improve moisture and chemical resistance, mechanical strength, electrical insulation, and dimensional stability, and can also reduce dust or control the release of additives.

Common applications include resin-coated sand (RCS), which is silica sand grains coated with resin for use as a proppant in hydraulic fracturing or as a casting core, resin-coated urea fertilizer to slow-release nutrients, resin-coated paper for moisture resistance in packaging or electrical insulation, resin-coated copper foil in electronics and printed circuit boards, and resin-coated abrasive grains used in abrasive tools.

Properties and considerations involve the choice of resin, which determines curing conditions and performance characteristics, such as heat resistance, chemical stability, and bonding to substrates. Coatings add thickness, density, and surface energy, and processing can affect particle size, flow, and handling. Environmental and health considerations relate to the resin formulation and curing process, including emissions and end-of-life disposal. Proper compatibility with the substrate and intended service conditions are essential for durable performance.