Pre-oxidized fiber or pre-oxygenated wire is obtained by high temperature heat stabilization treatment with polypropylene clear as raw material.

Pre-oxidized silk has high flame retardancy, the limit oxygen index is more than 45%, has excellent thermal stability, the fiber does not melt in combustion, no softening shrinkage, no dissolving droplets, is a quasi non-combustible products; good heat insulation, acid and alkali corrosion resistance, chemical environment resistance, good radiation resistance; has suitable textile processing performance, fabric light, soft, good water absorption and other advantages.

Polyacrylonitrile raw silk after 250-2800C high temperature treatment to get pre-oxide fiber made of felt, its thickness is 3-15mm, for shall be away from the heat source of the body of people, things is an ideal and effective external protection layer, pre-oxide fiber flame retardant high temperature resistant cloth, and very easy to wrap the surface of the uneven objects. Pre-oxidized fiber mat can work under 220 degrees for a long time without aging, shrinkage, high temperature resistance of 1000 degrees without burning.