Rock wool felt, commonly referred to as mineral wool felt or mineral fiber felt, is a type of insulation material made from natural rock such as basalt or diabase. It's produced by melting the raw material at high temperatures, then spinning it to create fine fibers, which are subsequently bonded together using a binding agent. As for the "Chinese" aspect, it's likely referring to rock wool felt manufactured in China. China is a significant producer of rock wool products, including felt, due to its large industrial capacity and access to raw materials. Chinese manufacturers often produce rock wool felt to various specifications for applications in construction, industrial insulation, and other uses where thermal and acoustic insulation are required.
Rock wool felt is valued for its fire resistance, thermal insulation properties, and ability to dampen sound, making it suitable for a wide range of applications in construction, manufacturing, and other industries.