Flammable materials generally include thermoplastic resin, thermosetting resin, rubber, paint, fiber (natural fiber and artificial fiber), wood, etc. The above flammable materials can be modified into flame retardant materials in the following ways.
(1) Thermoplastic resins Thermoplastic polyester resins include ordinary polyolefins, polyesters, polyamides, etc., such as polyethylene, polypropylene, polystyrene, ABS (acrylonitrile-butadiene-styrene copolymer), polyparaphenylene Ethylene glycol dicarboxylate (PET), polybutylene terephthalate (PBT), polycarbonate (PC), nylon 6, nylon 66, etc., are extruded and granulated in a screw extruder, corresponding to The flame retardant additives are melt blended into flame retardant particles to complete the flame retardant modification. But in general, flame retardant additives are targeted, that is, specific flame retardants act on a certain resin. There are few types of flame retardants that can be widely used, and usually require careful selection, testing and composite applications.
(2) Thermosetting resins Thermosetting resins include epoxy resins, phenolic resins, polyurethanes, unsaturated polyester resins, etc. This resin requires multi-component blending when used, so flame retardants can be added at the same time and mixed evenly by rapid stirring . After mixing, the curing reaction proceeds at a certain temperature. After curing, a thermosetting resin material with flame retardant properties can be formed.
(3) Rubber can be used as wire and cable materials, conveyor belt materials, etc., and has high requirements for flame retardancy. Flame retardant rubber is made by mixing raw rubber, flame retardant and various additives, plasticizing, blending and curing.