How is flame-retardant staple fiber flame-retardant?

(1) Endothermic effect. Flame retardants with high heat capacity will undergo endothermic reactions such as phase change, dehydration or dehydrohalogenation at high temperatures, reducing the temperature of the fiber material surface and flame zone, slowing down the rate of thermal cracking reactions, and inhibiting the generation of combustible gases.

(2) Cover protection. After the flame retardant is heated, it melts on the surface of the flame-retardant staple fiber material to form a glassy covering layer, which becomes a barrier between the condensed phase and the flame. It not only insulates oxygen, prevents the diffusion of combustible gas, but also blocks heat conduction and heat radiation, reduces the heat feedback to the fiber material, thereby inhibiting thermal cracking and combustion reactions.

(3) Gas dilution effect. The endothermic decomposition of the flame retardant releases incombustible gases such as nitrogen, carbon dioxide, sulfur dioxide and ammonia, which dilute the flammable gas concentration at the cracking site of the fiber material to below the combustion limit. Or the oxygen in some areas at the center of the flame is insufficient to prevent the combustion from continuing. In addition, this non-combustible gas also has the effect of heat dissipation and cooling. The order of their flame retardant effect is: N2>CO2>SO2>NH3.

(4) Condensed phase flame retardant. Through the action of the flame retardant, the thermal cracking reaction process of the fiber macromolecular chain is changed in the condensed phase reaction zone to promote dehydration, condensation, cyclization, crosslinking and other reactions until carbonization, so as to increase the carbonization residue and reduce the combustible gas Produce, make the flame retardant play a flame retardant effect in the cohesive phase. The effect of the condensed phase flame retardant is closely related to whether the flame retardant matches the chemical structure of the fiber.

(5) Gas phase flame retardant. Add a small amount of inhibitor to capture a large amount of light free radicals and hydrogen free radicals in the flame zone, reduce the concentration of free radicals, thereby inhibit or interrupt the chain reaction of combustion, and play a flame retardant effect in the gas phase. The gas-phase flame retardant effect is not sensitive to the chemical structure of the fiber material.

(6) The surface effect of particles. If there is a certain amount of inert particles mixed with combustible gas, it can not only absorb the heat of combustion and reduce the flame temperature, but also, like the wall surface of the container, on the surface of the particles, a large amount of high-energy hydrogen radicals in the gas phase combustion reaction , Transform into low-energy hydroperoxy radicals, thereby inhibiting gas phase combustion.

(7) Droplet effect: Some thermoplastic synthetic fibers, such as polyamide and polyester, shrink when heated, and the contact area with the air is reduced. Even the droplets fall and leave the fire source, causing the combustion to be affected to a certain extent. Hinder.

Uses of flame-retardant staple fiber products:

1. Protective clothing.

2. Household items.

3. Decorative items.

4. Ready-to-wear and minor clothing.

5. Non-woven fabrics and fillers

Hubei Botao Synthetic Fiber Co., Ltd. specializes in the production of polypropylene staple fiber, polypropylene staple fiber, colored polypropylene staple fiber, flame-retardant staple fiber and polypropylene staple fiber for felt. The main products of the company are polypropylene staple fiber: the specification is 0.3-110dt, the length is 5-150mm, the annual output is 30,000 tons, and the colors are complete. Polypropylene staple fiber is mainly used for: non-woven fabrics for sanitary materials (such as women’s sanitary napkins, baby diapers, medical masks, coats and hats, etc.), needle-punched carpets, electric blanket fabrics, filter cloths, geotextiles, automotive decorative cloths , Clothing lining, artificial fur, wool, yarn spinning, sanitary products hot-rolled non-woven fabric, polypropylene spinning, interior parts, speaker cloth, spinning yarn, filter material, absorbent material, cigarette filter, rope, wool top, filter material And other fields.

The above polypropylene staple fiber products can be added with anti-aging agents, flame retardants, anti-ultraviolet agents, etc. to increase the properties of polypropylene staple fibers according to user needs.

Company purpose: quality first, customer first, people-oriented, realistic and innovative, scientific management, honesty and trustworthiness.