The outer layer of fireproof bag is made of glass fiber with special treatment. Its inner layer is filled with special refractory, thermal insulation and expanding material. The fireproof bag is not flammable with fire resistance limit is up to over 4 hours and it can expand and solidify at a high temperature.
The outer layer is made of glass fiber twistless roving and its inner layer is filled with special refractory, thermal insulation and expanding materials, which can expand in high temperature and solidified so as to form a sealing layer for the purpose of preventing fire spreading.
