Flat belt is a kind of rubber products used for mechanical transmission, with high tensile strength, good preload retention performance, strong moisture resistance and other characteristics, can be divided into ordinary flat belt and high-speed flat belt, flat belt including cloth layer rubber, sealing glue, counterpart glue and edge slurry glue, etc., mostly processed with natural rubber, styrene-butadiene rubber as the main raw materials. When using natural rubber as the main raw material to prepare different rubber layers of flat belts, the rational use of reclaimed rubber can effectively reduce the production cost on the premise of ensuring the performance of the finished product.
1. What kind of reclaimed rubber can be used for natural rubber production of ordinary flat belts?
Latex reclaimed rubber is a reclaimed rubber processed from waste natural rubber, waste latex and its products, and the main component is natural rubber; Tire reclaimed rubber is processed from waste tire rubber, and the main components include natural rubber, synthetic rubber and carbon black. The above two kinds of reclaimed rubber have good compatibility with natural rubber and styrene-butadiene rubber, which can replace natural rubber to produce ordinary rubber flat belts, reduce the cost of raw materials, improve processing technology, and reduce vulcanization and return.
2. How to choose the right reclaimed rubber to reduce the cost of ordinary flat belts in the production of natural rubber
When reclaimed rubber replaces part of natural rubber to produce ordinary flat belts, rubber product manufacturers need to select appropriate varieties, colors and indicators of reclaimed rubber products according to the physical properties of different rubber layers of flat belts. In general, it is recommended to use white latex reclaimed rubber for light-colored rubber flat belts, which is easy to match; Black rubber flat belt wiping cloth glue can use black natural reclaimed rubber or tire reclaimed rubber to reduce more raw material costs.
3. How much reclaimed rubber is suitable for natural rubber production?
The performance requirements of different adhesive layers of ordinary flat belts are different, and the varieties and dosages of rubber raw materials are different: the rubber wiping of ordinary flat belts is generally based on natural rubber and styrene-butadiene rubber, and the glue content is controlled at about 50%; The sealing glue and counterpart glue E4LYY67 are generally completely made of natural rubber, and the glue content is controlled at about 40%. When using reclaimed rubber to reduce the cost of raw materials for ordinary flat belts, select suitable reclaimed rubber products and control the rubber content of the formula within a reasonable range according to the physical property requirements and glue content of different adhesive layers of flat belts.
4. Key points of natural rubber ordinary flat belt mixed with reclaimed rubber formula
When using natural rubber/styrene-butadiene rubber/reclaimed rubber and glue to produce ordinary flat belt cloth layer rubber, sulfur vulcanization is mostly used, combined with accelerator M/D, or sulfenamide accelerator is used in combination with M; Increase the amount of zinc oxide appropriately to improve the thermal conductivity of the rubber compound. When natural rubber flat belt sealing glue and counterpart glue are mixed with reclaimed rubber, it is recommended to use magnesium carbonate in an appropriate amount, increase the amount of zinc oxide and zinc barium white, and use antioxidant MB and other non-discolored antioxidants.
When using reclaimed rubber to reduce the production cost of ordinary flat belts, it is necessary to reasonably design the rubber formula, improve the aging resistance of the rubber compound, improve the flexural resistance of the rubber compound, and have a certain comprehensive balance performance and good adhesion. In the follow-up, the editor will share with you the vulcanization formula and formula adjustment skills of rubber flat belt wiping cloth glue mixed with reclaimed rubber.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits