Posts Tagged → Flame Resistant Conveyor Belt
The rising demand of Fire Resistant Conveyor Belt was first catered by Dunlop with high quality Flame Resistant Belts. We are a name to be reckoned with in the sphere of manufacturing and export of fire resistant conveyor belts. These belts are recommended for use in coal and such types of mines where the ambient temperature may not be high but there is a distinct hazard of the belts being enveloped in fire. The rubber covers are fire resistant and antistatic.
The Fire Retardant properties of the belt are determined invariably before dispatch, by Drum Friction Test, Electrical Resistance Test and Flame Test as per the provisions of various International Standards. Manufactured from optimum quality raw materials, our Flame Resistant Belts are high in performance. Today, we are counted among the key Flame Resistant Conveyor Belt Suppliers.
Large size, high strength, light weight and longevity of.
With the development of the coal industry, a large number of even more than 500 million tons million tons of large-scale mines coming on stream, large size, high strength increasing demand for Flame Resistant Conveyor Belt, large mine requires even more than the width more than 1600mm 3000mm, more than 2500N/mm even to 4000N/mm strength Flame Resistant Conveyor Belt, this Conveyor Belt carrying a large amount of long distance transmission, therefore, requires high strength, long service life, must be vulcanized joints; also asked with a thin body , Light weight, in order to facilitate investment and energy savings, a new type of reinforcing material must be used to meet the requirements.
New materials, production continuous.
Flame Resistant Conveyor Belt depends on the overall strength of the material with a core, at present, the whole country with a core of latitude and longitude are based on polyester / cotton or nylon / cotton-based, and therefore the body with thick, heavy, low intensity. And foreign general use as a warp polyester or aramid, nylon and cotton yarn for the weft, so with a core of thin, light weight, high strength. With high-performance, thin, lightweight trend, the overall strength of more than 3000N/mm with aramid core priority should be given for the warp, it will give the belt body is thin, light weight, in order to facilitate dipping and plastics So that substantial increase in the strength of conveyor belt, longer life
Flame retardant conveyor belt, also known as the entire core is the whole core by the polyvinyl chloride impregnated with a paste made of impregnated plastics or vulcanized with intensity, large volume, balance, transport characteristics, and flame-retardant conveyor With have a good flame retardant, antistatic, impact resistance, wear resistance, corrosion resistance and other properties.
Flame-retardant conveyor belt mainly used in underground coal transportation, can also be used in metallurgy, chemical industry materials transport. The whole flame retardant PVC conveyor belt can be divided into type and PVG type.
Cover both the upper and lower PVC-type plastic PVC cap, single-sided adhesive ≥ 0.8mm, PVG-type cover both the upper and lower nitrile rubber and PVC and use, single thickness of 1.5mm-4.5mm. PVC conveyor belt transport angle <16o, PVG conveyor belt transport angle <20o, can be used for coal surface and underground transport.
Flame-retardant plastic belt cover should also have high mechanical strength, abrasion resistance, flame retardant and antistatic properties.
① selection of raw rubber.
The choice of raw rubber cover rubber processing technology from performance and mechanical properties of these two performance requirements to consider. And carbon black by adding flame retardant to flame retardant and antistatic performance requirements.
② flame retardant system of choice.
For the flame retardant and antistatic products, flame retardant system is important. Carbon black in rubber products is a good reinforcing agent that can effectively reduce the product surface resistance. However, the use of carbon black tend to make the products produced with combustion (carbon black), on the block with combustion products will have very adverse effects. Therefore, the use of carbon black as a reinforcing agent for flame retardant and antistatic rubber products, how to effectively inhibit the flameless combustion is the formulation of focused consideration. The results show that the use of chlorinated paraffin and antimony trioxide, and can effectively prevent a flame burning, but at the same time contributing to the flameless combustion. Chlorinated paraffins, decabromodiphenyl ether, aluminum hydroxide, zinc borate system, been able to effectively inhibit the flameless combustion, but not enough to prevent flaming combustion significantly. Therefore, flame retardant nylon belt cover rubber layer to Choose the chlorinated flame retardant, decabromodiphenyl ether, antimony trioxide, aluminum hydroxide and zinc borate and use system.
Flame-retardant conveyor belt production process: mixing → drying → plastic mixing together refining → → → Parking → hot rolling → forming → refining sulfide → packaging. And non-nylon frame is different Conveyor Belt, Nylon Conveyor Belt layered flame retardant production process to go through the second stretch after curing setting treatment. Secondary stretching stereotypes are mainly two ways, one is cool under pressure mold setting method (hereinafter referred to as the mold shape), the other is outside the drawing cooling mode shape method (hereinafter referred to as the mode outside the stereotypes.) Simple shape mold, shape effect.However, this approach setting energy consumption, low production efficiency. Although outside the stereotypical mold method of comparison to be more of a stretching device, but after using this method of product quality, production efficiency, suitable for mass scale production.
Mainly used in coal mine. The band features: no delamination with the body, small elongation, impact resistance and tear resistance. Results can be classified according to different type of PVC (plastic surface), PVG type (based on the increase in PVC with rubber surface) with the whole flame retardant, the implementation of MT914-2002 standard. ○ PVC flame-retardant conveyor belt for angle of 16 degrees below the material handling in dry conditions.○ PVG flame-retardant conveyor belt for the wet angle of 20 degrees below the water delivery of materials 1, type N / mm (tensile strength): Level 4 5 6 7 8 9 10 Model 680s 800s 1000s 1250s 1400s 1600s 1800s · 2, flame-retardant properties: (1) Number of roller mill: roller surface temperature is not greater than 325 ℃. (2) torch burning: Full-thickness specimens to the torch flame an average of no less than 3.0S, to cover an average of less than 5.0S.(3) propane combustion: non-destructive lengths greater than 250mm · 3, safety performance: The conveyor belt has passed the flame test and static testing, test, and obtained certification of coal safety signs and customer recognition. This product uses the skeleton as a whole with a core material impregnated, coated hanging with excellent anti-static, flame-retardant properties of PVC and other materials made of plastics after. . 4, the longest life with the life of the body determined by the following factors(1) by the warp and weft yarn and woven cotton covered with a dense core; (2) Baptist specially formulated PVC material on the rubber band between the core and cover to achieve high adhesion strength; (3) Specially formulated plastic cover; so that the belt body impact resistance, tear resistance, abrasion resistance. 5, the mechanical properties: excellent mechanical properties of flame-retardant conveyor belt, can provide users with the longest service life and economical installation. 6, the product structure: the overall flame retardant conveyor belt used as a reinforcing material with a core, impregnated, coated hanging with excellent anti-static, flame-retardant properties of PVC and other materials made of plastics after.