Heat-resistant conveyor belt uses different types of raw rubber, and the product appearance quality are different, and the appearance defects of different rubber types are not same. The following are several varieties of rubber materials we commonly use.
If you are looking for more details, kindly visit our website.
SBR: SBR is the most commonly used rubber material for heat-resistant belts. Compared with the EPR and neoprene rubber, SBR is the most cost-effective. Therefore, many manufacturers generally use it to produce T1 or T2 conveyor belts. The process performance of SBR, such as mixing, calendering, and vulcanization, is pretty easy to master, and the appearance quality is better than that of ethylene propylene and neoprene.
EPDM: Ethylene-propylene rubber is used as the heat-resistant belt cover, which has better heat resistance. Therefore, it is an ideal material for heat-resistant belts. Generally, EPDM rubber can be used for a long time in an environment of 150', but EPDM rubber has poor process performance. The cover has poor adhesion, and the surface is often rough and not smooth when the sheet is rolled out of more than 4mm. Therefore, the appearance of the belt has more scars and grooves on the edges than SBR belt. This type of rubber is suitable for T3 conveyor belts.
Neoprene: The heat resistance of Neoprene rubber is not as good as SBR and EPDM, but it has good acid resistance. In the production of chemical industry, acid and heat resistance conveyor belts are required. Due to the low heat resistance requirements(the temperature is below 100') and the high acid resistance requirements. We choose the neoprene rubber for some fertilizer industry. The process performance of neoprene rubber is different from that of SBR and EPDM. Due to its high thermal stickiness, it often sticks to the rollers when the film is discharged, and the shrinkage is large when the film is pressed. It is easy to adhere to the hot plate during vulcanization. So bubbles and cracks problem usually happens. Special measures should be taken for the appearance quality to ensure the smooth surface of the belt.
The appearance of the heat-resistant belt produced by different fabric is also different. The nylon belt is easy to has longitudinal wave and scars, while polyester-cotton don't. Various fabric, including nylon cloth, EP cloth, and polyester-cotton cloth have their own advantages and disadvantages. For different types of fabric, the causes of appearance defects are different.
Polyester-cotton canvas: It has become a history to use pure cotton canvas to produce heat-resistant belts, because the price of pure cotton cloth is too high, and the price of fabrics blended with polyester fibers is much lower, and the heat resistance performance is better than pure cotton cloth. polyester-cotton canvas heat-resistant belts is currently widely used in many companies. The belts have stable dimensions and good appearance, no longitudinal wave, and no crack at the edges. The disadvantage is that the adhesion between the fabric layer is low and the flex resistance is poor.
EP canvas: The warp direction is polyester and the weft direction is nylon. EP canvas is stronger and has better heat resistance than polyester-cotton cloth, especially the adhesive between the layer, so it is more durable than polyester-cotton cloth in harsh environments. However, due to shrinkage during vulcanization, the appearance will also be defective if you don't pay attention to the production process
The conveying method of the rubber conveyor belt depends on the conveying capacity of the conveyor belt and will be restricted by terrain and environmental protection conditions. It is the prerequisite for determining the carcass material, structure, safety factor, and conveyor belt length for heavy-duty rubber conveyor belts. The rubber conveyor belt has the characteristics of heat-resistant belt, wear-resistant belt, fire-resistant belt, oil-resistant belt, alkali-resistant belt, acid-resistant belt, heat-resistant belt, and cold-resistant belt. It is mainly used for the transportation of solid materials in various mining, metallurgy, steel, coal, hydropower, building materials, chemical, food, and other enterprises.
For more information, please visit HIHERO.
The performance of the conveyor belt is closely related to the material, structure, and number of layers of the belt core. The multi-layer cotton canvas belt has low strength, many layers, is not fatigue resistant, easy to mold, heavy-weight, and high energy consumption;
Nylon belts have high strength, great elasticity, lightweight, good impact resistance and bending resistance, good trough forming performance, mildew resistance, water resistance, and other properties that are better than cotton canvas conveyor belts. The disadvantage is that the elongation is large. When the tensioning stroke can be set to be longer, the nylon rubber belt can be preferred;
The strength of the polyester belt is similar to that of nylon. It has all the advantages of a nylon conveyor belt. Its elastic modulus is higher than nylon, its elongation is small, and its dimension is stable. It is an ideal transportation belt commonly used in industry.
The steel cord conveyor belt has high strength, good trough ability, small elongation, and short tensioning stroke. It is especially suitable for the transportation requirements of large transportation volume, high belt speed, and long-distance.
From the structural point of view, the rubber conveyor belt is mainly composed of three parts: carcass material, cover layer, and skim rubber material. The covering layer is a key part that determines its performance and use. According to the different materials used in the cover layer, the conveyor belt industry can be divided into two categories: heavy conveyor belts and light conveyor belts. The former uses rubber (including natural rubber and synthetic rubber) as the main raw material, so it is also called rubber conveyor belts. The scope is concentrated in the fields of heavy industry and infrastructure construction; the latter mainly uses polymer materials, which are mainly used in light industries such as food and electronics.
The choice of cover layer includes covering material, surface morphology, and thickness. The main components of the covering layer are various rubbers and plastics. Since the properties of various rubbers vary greatly, such as natural rubber and styrene-butadiene rubber have good abrasion resistance, ethylene-propylene rubber is particularly heat-resistant, but cyanide rubber has good oil resistance, and propylene butyl rubber is both heat-resistant and oxidation-resistant. Therefore, the choice of the type of covering material must be comprehensively considered according to the types of commonly used conveying materials, operating conditions, and working environment.
Besides, the increase in the thickness of the covering layer is also conducive to improving the impact resistance and abrasion resistance of the rubber conveyor belt. Especially nowadays, the cotton canvas belt core has been replaced by a synthetic fiber fabric belt core. The performance of the belt core has been greatly improved, while the thickness is relatively reduced. To improve the overall performance of the belt, it is necessary to increase the thickness of the covering layer to give full play to its advantages and increase the service life of the conveyor belt. However, if the lower covering layer is too thick, the running resistance of the conveyor belt will increase.
Contact us to discuss your requirements of Heat Resistant Conveyor Belt. Our experienced sales team can help you identify the options that best suit your needs.