EPS Pre-issuers Have So Many Effects!

Do you know the five major effects of EPS pre-expansion machines?
Covering Effect: At higher temperatures, phosphorus-based flame retardants in EPS foam machinery form a stable covering layer on the polystyrene surface. This layer prevents heat from combustion from penetrating the material's interior, hindering the escape of flammable gases generated during polystyrene decomposition, and acting as an air barrier, thus inhibiting material degradation and achieving flame retardancy.

Dilution Effect: The thermosetting modified polystyrene board flame-retardant coating generates a large amount of non-flammable gases during thermal decomposition. This dilutes the flammable gases and oxygen in the air generated during polystyrene decomposition, preventing them from reaching flammable concentrations and thus inhibiting ignition and combustion.

Carbonization Effect: The thermal degradation products of phosphorus-based flame retardants promote rapid dehydration and carbonization of the polymer surface, forming a carbonized layer. Elemental carbon cannot undergo evaporation or decomposition combustion. The product obtained from the thermal decomposition of phosphorus-based flame retardants in EPS foam machinery is polymetaphosphoric acid, a strong dehydrating agent that further promotes carbonization of the material. Therefore, it has flame-retardant protection.

 

Inhibition Effect (Free Radical Scavenging): The combustion of polystyrene is mainly due to a free radical chain reaction. The substances contained in our flame-retardant liquid can correspondingly capture the active intermediates of the combustion reaction, inhibiting the free radical chain reaction, thus reducing the combustion rate until the flame is extinguished.

 

Synergistic Effect: The foam machinery incorporates special synergistic materials. Some materials, when used alone, have no flame-retardant effect or only a slight one. Combining multiple materials can enhance the flame-retardant effect. Therefore, our company selects highly synergistic flame-retardant materials for compound flame-retardant modification.

 

The fully automatic foam machinery adopts advanced and mature penetration heating molding technology from both domestic and international sources. It has strong penetration, good adhesion, low steam consumption, fast molding speed, and high production efficiency, more than doubling the production rate compared to ordinary manual or semi-automatic machines. The machine has high strength, does not deform, has good sealing performance, and can withstand the expansion force of high-density fiberboard production. Fully automated foam machinery automatically completes the processes of mold opening, mold closing, mold locking, material feeding, heating, heat preservation, cooling, demolding, and product ejection in a continuous cycle.