Flame retardant PVC transparent film and polymer

Plastics or polymers actually use more product materials in our lives, and the development of society is indeed inseparable from polymers, and the development of polymers is very fast, which has produced polymerizations such as pvc, pp, and pe. Materials such as plastic wrap commonly used in our lives are designed based on pvc transparent films. They are very important and have a high status in mechanical equipment and light industry. And plastic is not a panacea or harmless, its burning will emit a pungent odor, affecting the body, so here to introduce its flame retardant.

????Combustion is a chemical reaction involving oxygen. First, the fuel and oxygen are mixed, and then the mixture is ignited by the ignition heat source, and flame combustion occurs. Fuel, oxygen (air) and heat are the three basic elements of combustion. In fact, combustion is a very complicated process, especially the combustion of polymers such as pvc membranes. It is affected by many internal and The influence of external factors.

????1. The PVC film polymer first begins to undergo thermal degradation or thermal oxidative degradation in the presence of oxygen under the conditions of external heat source irradiation, producing combustible volatiles.

????2. The generated flammable volatiles are released from the polymer surface, diffuse into the gas phase, and mix with the oxygen diffused from the air.

The flame retardant of PVC transparent film and polymer is introduced above, and the rest of the flame retardant process will be introduced here.

????3. The pvc film is ignited, resulting in flame burning. During combustion, the volatiles will be further thermally oxidized and degraded, resulting in more combustible small molecule combustibles. The combustion generates a lot of heat, and a series of combustion products are generated and released from the combustion zone. These products include H2O, CO2, smoke and toxic gases (black particles, CO2, HCL, HCN, SO2, etc.).

????4. Part of the heat generated by the pvc membrane combustion is taken away by the combustion products and the surrounding cold environment, and the other part is fed back to the surface of the polymer material, so that the polymer is further heated for thermal degradation and thermal oxidation degradation, thereby continuously producing flammable volatilization Product and diffuse into the flame combustion reaction zone.