Flame retardant non-woven fabric, flame retardant dust filter bag,

Flame retardant treatment

The utility model belongs to the technical field of needle-punched felt, in particular to a flame-retardant needle-punched felt. It includes a dust-facing layer, a supporting layer and a base cloth layer between the dust-facing layer and the supporting layer. The dust-facing layer and the supporting layer are mesh structures made of PET entangled; the base cloth layer is a mesh structure interwoven by the meridian monomer and the weft monomer; the dust-facing layer, the base cloth layer and the supporting layer are strengthened by needling each other. A flame retardant layer is arranged above the dust-facing layer, and the flame retardant layer is a network structure formed by the entanglement of polyimide fibers. The flame retardant layer of the utility model can prevent the direct contact between the spark carried in the smoke and the dust-facing layer, improve the flame retardant performance of the needle-punched felt, and increase the service life of the needle-punched felt.