This type of foam has good flame retardancy and heat resistance

Posted by AdvancedMaterial on January 27th, 2021

'Flame retardant' is generally only for small fires and can still burn in large fires. In addition to adding flame retardants to the foam, there are several other methods to produce flame retardant foams. 488 Core material foam, PMI foam, high temperature resistant foam Prospects of PMI foams, high temperature resistant foam stability is an important performance of foam. The flame retardant method of the core foam plastic: Generally, the flame retardancy of the foam is improved by adding flame retardants to achieve the purpose of delaying burning, preventing smoke, and even making the fired part self-extinguishing. This method Generally, the flexible polyurethane foam is impregnated with a flame retardant solution or dispersion containing an adhesive, the excess solution is removed by pressing, and then dried to obtain the flame retardant flexible foam.

Especially the polyurethane soft foam has a high open rate and many combustible components. The impregnation method is flame retardant treated PU soft The key to foam technology is to develop a flame-retardant fluid formula that has sufficient adhesion to the PU soft foam meridian after the flame-retardant fluid is dried, but does not harden the foam. Polyurethane without flame retardant treatment is combustible.Polyurethane core foam plastic> Flame retardant requirements of core foam plastic: Polyurethane core foam plastic contains combustible hydrocarbon segments, has low density and large specific surface area. Many applications of polyurethane core foam, such as building Wholesale China Polymethacrylimide Foam materials, mattresses, furniture, insulation materials, car seat cushions and interior materials, have flame-retardant requirements.

Foreign countries attach great importance to the flame retardancy of polyurethane foam materials, and have promulgated many related flame retardant regulations and flame retardant standards. However, foam plastics with good flame retardant properties are not easy to cause fires. It will burn. , Have put forward flame-retardant requirements one after another, and many have adopted flame-retardant polyurethane foam. The so-called flame-retardant actually refers to a specific standard that meets a certain specification or a certain test method.5~34. Because the impregnation treatment is carried out after the foam is formed, Impregnation is not limited by the foaming process, and the amount of flame retardant can be increased appropriately. Sometimes the flame retardant effect is more obvious than the addition method. For ordinary foam, impregnation can also be used to make it flame retardant.

Even if a fire occurs, the reduction in combustion performance can reduce the spread of fire and reduce combustion Toxic smoke generated. Burning and decomposition will produce a large amount of toxic smoke, which will make it difficult to extinguish the fire. Our country has a lot of attention to the polyurethane foam used in aircraft, ships, railway vehicles, automobiles, other important industrial parts, equipment and certain places. Once it catches fire, the combustion process will be very fast.3, and the amount of smoke is small. This type of foam has good flame retardancy and heat resistance.

The oxygen index of the product is as high as 29. The most important one is to add trimerization catalysts through isocyanate Polyisocyanurate rigid foam is produced by polyreaction. Resistant can also be used Combustible elemental polyols and reactive flame retardants are the foam raw materials. Due to the high air circulation during combustion The continuous supply of oxygen is flammable and not easy to self-extinguish