As is well known, weft free tape is an insulating material made of alkali free glass yarn impregnated with a specialized high-temperature resistant heat curing resin. According to the temperature resistance level, it can be divided into B-grade weft free belts, F-grade weft free belts, H-grade weft free belts, and C-grade weft free belts. Eric Insulation is currently one of the manufacturers that fully covers the temperature resistance level of weft free tapes. The company has been committed to research on weft free tapes for more than ten years and has achieved technological innovation based on traditional processes. The relevant patent is currently being applied for.