Reference formula for patterned conveyor belt flat base belt with a small amount of recycled rubber
The patterned conveyor belt consists of two parts: the base belt and the pattern. It is used to transport materials with an inclination angle of 0 to 40°, effectively preventing the material from sliding down. The flat base belt covering rubber and the adhesive between the covering rubber and the striped rubber are mostly made of natural rubber/butadiene rubber and rubber. In actual production, recycled rubber can be added to the raw materials of the patterned conveyor belt flat base belt in an appropriate amount to further reduce the raw material cost while improving the process performance of the rubber.
1. Reference formula for patterned conveyor belt flat base belt covering rubber
60 parts of natural rubber, 40 parts of butadiene rubber, 10 parts of recycled rubber, 5 parts of zinc oxide, 4 parts of stearic acid, 2 parts of antioxidant, 1.5 parts of paraffin, 50 parts of carbon black, 11 parts of softener, 10 parts of operating oil, 0.8 parts of sulfur, 2 parts of accelerator; total: 196.3 parts.
2. Adhesive between flat belt cover rubber and stripe rubber
70 parts of natural rubber, 30 parts of butyl rubber, 30 parts of recycled rubber, 5 parts of zinc oxide, 2.4 parts of stearic acid, 2 parts of antioxidant, 45 parts of carbon black, 14.5 parts of softener, 11 parts of operating oil, 2.2 parts of sulfur, 1.9 parts of accelerator; total: 214 parts.
3. Basic requirements for various parts of patterned conveyor belt base
In actual production, the flat belt cover rubber of patterned conveyor belts generally requires a tensile strength of 15MPa, an elongation at break greater than 350%, and an Akron wear loss of less than 0.2cm3. When using recycled rubber HYL15Y4Y2Y in natural rubber/butyl rubber mixed rubber to improve the process performance of flat belt cover rubber and reduce costs, generally select appropriate recycled rubber products according to the basic performance requirements of the flat belt, and then adjust the process and formula appropriately to further improve the comprehensive indicators of the patterned conveyor belt base containing recycled rubber.
4. How to adjust the formula of base belt covering rubber containing recycled rubber
In actual production, the amount of recycled rubber in the flat base belt covering rubber of patterned conveyor belts can be controlled at about 10-20 parts, and the amount of recycled rubber in the adhesive between the flat base belt covering rubber and the striped rubber can be controlled between 20-30 parts. The specific amount is determined according to the performance requirements of the conveyor belt and the basic indicators of the recycled rubber. When using sulfur vulcanization, it is recommended to use accelerator CZ as the main agent and accelerator TT as the auxiliary agent; commonly use high wear-resistant carbon black N330 for reinforcement; use antioxidant RD to improve the heat and oxygen aging resistance of the rubber.
The reasonable use of recycled rubber in the flat base belt covering rubber of patterned conveyor belts and the adhesive between the flat base belt covering rubber and the striped rubber can not only improve the processing properties of the rubber, such as plasticity and fluidity, but also reduce the cost of raw materials, and can also improve the aging resistance and dimensional stability of the finished conveyor belt.