Flame retardant clothing refer to protective clothes which can slow down flame spreading and carbonize clothes to form isolation layer after direct contact with flame and hot objects to protect human safety and health. Fire retardant fabrics play an important role in the consumption of protective textiles because of the frequent occurrence of fires in families or public places.
The importance of fire-retardant clothing lies in that it directly faces the harsh and dangerous environment, protects the personal safety of workers and firefighters, and greatly reduces the degree of burns to human body caused by fire in the fire field through the safety protection function of fire-retardant clothing. Increasing rescue opportunities to protect the lives and safety of workers, therefore, the quality of fire-retardant work clothing is crucial.
The requirements for flame-retardant clothing are also higher and stricter in production. Most of the existing flame retardant clothing is not ideal in durability, which accelerates the pace of research and development of safe and durable flame retardant work clothing. In this complex situation, the performance requirements of fire-fighting and flame-retardant clothing are mainly reflected in the following aspects:
1. The outer layer has permanent flame retardancy and fire resistance.
The outer layer of protective clothing is the one that directly contacts with fire and heat, and is also the most critical layer that affects the performance of the product.
(1) Adding chemical additives to the fiber or flame retardant treatment of the fabric, that is, by adsorption deposition, chemical bonding, non-polar van der Waals force binding or bonding to make flame retardant fixed on the fabric or yarn, in order to achieve flame retardant effect. The development of this method depends on the development of flame retardants and the improvement of technological process.
(2) Improving the thermal stability of fiber-forming polymers can increase the pyrolysis temperature, inhibit the generation of combustible gases, increase the degree of carbonization, and make the fibers difficult to ignite and burn, such as introducing aromatic or heterocyclic rings into the macromolecular chains, and changing the reaction between linear macromolecules into three-dimensional cross-linking structure. This method is related to the development of some high performance fibers.
2, good waterproof performance
Generally, water is widely used as a fire extinguishing agent to put out fires, so fire-retardant clothing should also have good waterproof performance, if protective clothing such as fire clothing is not waterproof, it will have a lot of adverse effects.
3. Good insulation performance
According to the data, the temperature of the fire field is between 60 and 1100 degrees Celsius, and the radiant heat is 1.5 Kw / 237
Only a thin flame retardant outer layer is not enough, if the use of increasing the thickness of the outer layer material to meet the requirements, and will make the cost too high. New type of flame retardant clothing is generally made of permanent flame retardant staple fiber with good wearability into thin felt non-woven fabrics. This kind of material plays a particularly prominent role as heat insulation material.
4. Antistatic property
In the working environment of petrochemical and other industries, static electricity may also become a source of ignition, causing fire, anti-static fiber in flammable and explosive environment to increase the wearer's safety factor, while anti-static fiber can also improve the comfort and wear resistance of clothing.
5. Good breathability.
Fire high temperature, heat, firefighter activity, human body sweat, if the poor permeability of protective clothing, people will feel stuffy, suffocation, seriously affecting combat effectiveness. At present, the method to solve this problem is to use composite micro-porous tetrafluoroethylene membrane flame retardant cloth. The micro-porous tetrafluoroethylene membrane itself is high-temperature resistant. As long as the pore size within a certain range, the material's hydrostatic pressure resistance and air permeability reach a certain target, it can block the passage of water and discharge sweat vapor smoothly.
Flame retardant clothing are required not only to have flame retardant function, but also to have more properties, such as waterproof, oil repellent, antistatic, etc. according to the practical application in life and production. Oil repellent treatment can improve the function of fire retardant clothing for safety protective articles and carry out antistatic treatment, which can be used in oil refining and chemical industry. Industry, to prevent serious consequences caused by static electricity.