Natural rubber gate water seal P-type rubber waterstop is an important waterproof component, mainly used for the sealing of the gate in hydropower projects, this waterstop is mainly made of natural rubber or synthetic rubber, with good elasticity and the ability to adapt to deformation. When using natural rubber as the main raw material to produce the rubber gate water seal P-type rubber waterstop, the appropriate amount of natural latex reclaimed rubber can be mixed to effectively reduce the cost of rubber raw materials.
Latex reclaimed rubber is a recycled rubber made of waste natural rubber, waste natural latex products or natural latex and other external products after desulfurization treatment, its main components include rubber hydrocarbons, moisture, ash, etc., and has similar performance characteristics to natural rubber, including high mechanical strength, good elasticity and resilience, wear resistance and tear resistance; It can directly replace natural rubber or be used in combination with natural rubber to produce natural rubber products to reduce costs.
Low-cost vulcanization formula for latex reclaimed rubber production gate water seal P-type rubber waterstop:
100% black natural latex reclaimed rubber, 5.4 parts zinc oxide, 1.2 parts stearic acid, 1 part antioxidant SP-N, 1 part of antioxidant MB, 1 part of dispersant, 12 parts of petroleum-based softener, 65 parts of carbon black, 20 parts of light calcium carbonate, 12 parts of bentonite, 2.3 parts of sulfur, 1.1 parts of accelerator M, 1 part of accelerator DM; Total: 223 copies.
When using latex reclaimed rubber alone or natural rubber/latex reclaimed rubber in combination with the production of gate water seal P-type rubber waterstops, the design formula needs to consider various factors such as elasticity, aging resistance and water resistance.
The actual formula of the P-type rubber waterstop for the production of latex reclaimed rubber needs to be adjusted according to the specific application requirements, mainly including raw rubber, vulcanization system, reinforcing filling system, softening plasticization system and some special additives.
High-quality latex reclaimed rubber has good elasticity and the ability to adapt to denaturation, which can directly replace the P-type rubber waterstop of natural rubber production gate water seal, and generally uses sulfur vulcanization, which can give the rubber better physical properties. For example, if the waterstop needs to be used in a particularly harsh environment, it is recommended to add more antioxidants or choose higher performance rubber varieties; If you want to reduce costs even more, you may need to adjust the ratio of filler to softener.
Compared with natural rubber, latex reclaimed rubber has better aging resistance. If you want to further improve the aging resistance of latex reclaimed rubber gate water seal P-type rubber waterstop, in addition to antioxidants, you can also use nano zinc oxide and nano calcium carbonate to rewrite to improve the aging resistance and tear resistance of the waterstop; Or appropriately increase silica, HFR-3000, etc., high waterstop oil resistance, solvent resistance, ozone resistance and other properties; In the production process, by controlling the process parameters such as mixing temperature and vulcanization conditions, the thermal-oxidative aging of the rubber waterstop during the processing process can be reduced, so as to improve its aging resistance.
When using latex reclaimed rubber to produce gate water seal P-type rubber waterstop, how to further reduce the cost of raw materials on the premise of ensuring the performance of the product? We will continue to discuss these issues with you in the future.
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