Composite insulator

Bakelite is a composite material based on thermosetting phenolic resin, obtained from formaldehyde and phenol through electrophilic substitution. Bakelized Paper is the result of layering cellulose paper with a phenolic resin compound. Invented in 1907, Bakelite is the first thermosetting material, meaning a material that, once melted, cooled, and hardened, can no longer be reheated or reshaped. In the industrial sector, it brought significant innovation and, due to its characteristics and low cost, it gained widespread use until the 1950s (later replaced over time by new plastic materials). Bakelite has thermoelectric insulating properties that, mainly in the past, made it widely used in electrotechnical elements such as electrical switches, sockets, cookware handles, radio receivers, and others. It is considered the first synthetic plastic material to be produced and used, although it was preceded by natural-based plastic materials. Black Bakelized Paper LBNN has the following properties: Good dielectric properties, even in humid environments Excellent shearability, even in cold conditions Significant heat resistance Resistant to industrial solvents Moderate mechanical properties, improved in the fabric-reinforced version Among the product’s defects, it is noted that: Despite its good thermal insulation properties, it is not suitable for working in high-temperature environments Produces dust during processing Exposure to sunlight and time can darken its color Not resistant to acids MECHANICAL ELECTRICAL