What is the preparation method of flame retardant materials?

Since the intrinsic flame retardant material does not require further flame retardant treatment, the following content is all for the additive flame retardant material. Flammable materials can generally include thermoplastic resins, thermosetting resins, rubber, paint, fibers (natural fibers and artificial fibers), wood, and the like. The above flammable materials can be modified into flame retardant materials by the following methods.

(1) Thermoplastic resin Thermoplastic polyester resin includes common polyolefins, polyesters, polyamides, etc., such as polyethylene, polypropylene, polystyrene, ABS (acrylonitrile-butadiene styrene copolymer), poly-p-phenylene Ethylene Dicarboxylate (PET), Polybutylene Terephthalate (PBT), Polycarbonate (PC), Nylon 6 and Nylon 66, etc. For the above-mentioned materials, they and the corresponding flame-retardant additives are pelletized by melt blending and extrusion in a screw extruder to prepare flame-retardant pellets to complete the flame-retardant modification. But usually flame retardant additives are targeted, that is, a specific flame retardant acts on a certain kind of resin. There are fewer types of flame retardants that can be widely used, so they usually need to be carefully selected, tested, and combined.
(2) The thermosetting resin includes epoxy resin, phenol resin, polyurethane, unsaturated polyester resin and the like. This type of resin requires multi-component blending in application, therefore. The flame retardant can be added at the same time and mixed evenly through rapid stirring. After the mixing is completed, the curing reaction is carried out at a certain temperature, and the thermosetting resin material with flame retardant properties can be formed after the curing is completed.
(3) Rubber rubber can be used as wire and cable material, conveyor belt material, etc. The flame retardant requirements are very high. Flame retardant rubber is prepared by blending raw rubber, flame retardants and various additives, then plasticizing, blending, and vulcanizing to prepare flame retardant rubber materials.
(4) Coatings and coatings are also blended with multiple components. Therefore, in use, the flame retardant and its composite components and the components forming the coating are usually blended to form the coating by stirring, and then coated on the surface of the steel structure or wooden structure to form a flame retardant coating.
(5) Fibers include chemically manufactured fibers such as polyester, polypropylene, acrylic, spandex, etc., as well as natural fibers such as cotton fabrics and silk fabrics. Chemical fibers can be spun with flame-retardant pellets with flame-retardant properties before being made into fibers. The resulting fiber has flame retardant function. In addition, the flame retardant functionalization can also be completed by finishing the fibers and fabrics. The fiber fabric is immersed in a flame-retardant finishing solution. The flame-retardant components can be reactive and react with the functional groups on the fiber to bond the flame-retardant structure to the fiber. The flame-retardant components can also be physically adhered to the fiber. Fiber. However, the physically adhered flame-retardant components have poor water-wash resistance due to the weak bonding force of the flame-retardant components and fibers. As a result, the fiber loses its flame retardant function after repeated washing.
(6) Wood Wood is a flammable material. However, as a naturally occurring material, it has the characteristics of environmental protection, renewable, and biodegradable. The fire retardant of wood usually adopts the impregnation method. That is, through high negative pressure, the gaps in the wood and the air in the fiber pipe are drawn out, and the wood is immersed in the flame-retardant liquid. The pressure makes the flame-retardant components enter the wood, and the flame-retardant wood material is formed after drying.