PVC flame retardant conveyor belt is the main means of transportation underground in coal mines, and can also be used for material transportation in the metallurgical and chemical industries. PVC flame retardant conveyor belt is made of an integral belt core after plasticization or vulcanization by polyvinyl chloride impregnation paste. It is suitable for material transportation under dry conditions with an inclination angle below 16 degrees. It has the characteristics of light weight, long life, good wear resistance, good tear resistance, and anti-corrosion. So why can PVC flame retardant conveyor belt be used in complex scenarios such as underground coal mines? With this question in mind, let's take a look at the flame retardant principle of PVC flame retardant conveyor belt.

The flame retardant principle of PVC flame retardant conveyor belt:

1. The selection of the main raw material PVC: in order to obtain good physical and mechanical properties and flame retardant properties, in order to meet the needs of safe underground production of coal mines, PVC is used as the main raw material for the production of flame-retardant conveyor belts. PVC not only has good mechanical properties, but also has good flame retardant properties. Because PVC has a high chlorine content, when it decomposes by heat, hydrogen chloride and active chlorine atoms are first released. The active chlorine atoms in turn combine with the active hydrogen atoms in the combustion reaction to terminate a combustion chain and generate a hydrogen chloride molecule. The hydrogen chloride gas generated dilutes the concentration of combustible gases in the combustion area and the concentration of oxygen, while isolating oxygen to achieve the purpose of hindering combustion.

2. Flame retardant principle: flame retardant produces heavier non-combustible gases or high-boiling liquids, which cover the surface of the flame retardant conveyor belt material, cutting off the connection between oxygen and combustibles. And through the endothermic decomposition and endothermic sublimation of flame retardant, the temperature of the polymer surface is reduced to achieve the effect of making it difficult to burn or delaying the combustion process.

Basic performance of flame retracant conveyor belt:

1. Flame retardant properties: the surface temperature of the drum of the flame retardant conveyor belt is not greater than 325℃, the average flame-free time of the full-thickness specimen to the blowtorch is not more than 3 seconds, the average flame-free time to the cover layer is not more than 5 seconds, and the non-destructive length of propane combustion is greater than 250mm.

2. Safety performance: the flame retardant conveyor belt produced by our company has passed tests such as flame retardant testing and electrostatic testing.

The flame retardant conveyor belt produced by Liaoning Hengyi Rubber Machine Belt Manufacturing Co., Ltd. adopts environmentally friendly materials and processes, which can be recycled and processed after disposal, and meets environmental protection standards. Our flame retardant conveyor belt has good flame retardant and antistatic properties by setting a flame-retardant overall belt core in the cover layer, and can be used safely in flammable environments. Our flame retardant conveyor belt is lightweight and flexible, suitable for a variety of complex terrain and limited space transportation environments. And all products of our company will be professionally packaged before transportation. We use packaging materials that meet international standards to prevent products from being damaged by the external environment during long-distance transportation. For special specifications of products, we can provide customized packaging. If you are interested in our company's products, please feel free to contact us!