To produce polypropylene ton bags, it is usually necessary to add an anti-aging agent and then add calcium carbonate, which will definitely reduce the aging resistance of the product. The more you add, the more the reduction will be. This has been confirmed by the production practice of many plastic weaving enterprises. Therefore, plastic woven enterprises that produce FIBCs, products that require high UV resistance, are particularly cautious when adding calcium carbonate masterbatch, generally not exceeding 1%, or not adding it. In order to make the woven product opaque, titanium dioxide can be added.
Some experts believe that the thermal conductivity of calcium carbonate is much greater than that of polymer material polypropylene, and it is easy to introduce heat into the product. Therefore, when the formula contains calcium carbonate, it will affect the material's resistance to heat and oxygen aging. At the same time, calcium carbonate also has a feature that it easily causes the surface of polypropylene products to pulverize. In addition, calcium carbonate is not acid resistant, which will also affect the stability of the product in an acid rain environment. Because the addition of calcium carbonate will affect the weather resistance of polypropylene, the greater the amount of addition, the more serious the effect.
