In the field of high-temperature insulation materials, the quality of mica rolls directly affects the safe operation of entire production systems. As a professional mica roll manufacturer, NBRAM once provided customized solutions for Baosteel Group's hot rolling production line. The annealing furnace in this production line maintains temperatures above 800℃ long-term, where ordinary insulation materials are prone to aging and embrittlement. Our mica roll uses flake mica as base material combined with high-temperature resistant silicone resin, maintaining excellent insulation performance and mechanical strength after three years of continuous operation. This case made us the designated supplier for multiple steel enterprises. Our Mica Roll series includes Flexible Mica Roll, etc.
According to different industrial scenario requirements, we have developed multiple series of mica roll products. Among them, the mica roll for power transformers uses high-purity muscovite raw materials, with breakdown voltage strength reaching over 35kV/mm, effectively improving equipment safety margin. For special motor insulation needs, we developed flexible mica rolls with tensile strength reaching 120N/cm² while maintaining good wrapping performance. Notably, our flame-retardant mica roll developed for rail transit not only passes UL94 V-0 certification but also maintains integrity for over 90 minutes at 800℃ flame, buying valuable time for personnel evacuation.
Currently, NBRAM mica rolls have obtained UL certification (USA), CE certification (EU), and comply with ROHS environmental directives. We maintain stable cooperation with companies like TBEA and CRRC, exporting products to over 30 countries and regions including Germany, Japan, and India. Our production base features advanced mica paper production lines, through precise coating process control, keeping mica roll thickness deviation within ±0.02mm. Each batch undergoes 15 strict tests including voltage endurance, temperature resistance, and flexibility. Recently, our new generation nano-composite mica roll developed in cooperation with Xi'an Jiaotong University Materials School achieves corona resistance life over 5 times that of traditional products, expected to play important role in new energy fields. Choosing NBRAM mica rolls means opting for proven insulation solutions.
When electrical engineers first approach us about mica products, they often share the same concern: "We need insulation that can bend without breaking, both literally and figuratively." That's precisely why we developed our flexible mica roll – to solve the real-world challenge of installing insulation in tight spaces without compromising performance.
