It is primarily used for coating glue of voice coil bobbins and self-adhesive finish of voice coil enameled wire. Unlike traditional insulating varnish (varnish), voice coil insulating varnish not only requires extremely high temperature resistance (above 300°C), but also meets a series of stringent specifications such as alcohol solubility and tensile strength. Due to China's late start and backward technology, domestic voice coil manufacturers have long relied on imports of SV glue from Japan, and high-end audio technology has been controlled by foreign countries.
In response to customer demand, BONT established an SV glue project research and development team in 2017. After six years, they successfully tackled the technical challenges of SV glue. Not only does its performance perfectly meet customer needs, but the product is also more environmentally friendly as it does not contain cresol, achieving a leapfrog over foreign products. Currently, it is being used in batches by several large voice coil enterprises in China.