The addition ratio and performance balance of calcium carbonate filled masterbatch: adjusted as needed, balancing cost reduction and quality
Oct 12,2018
The addition ratio of calcium carbonate filled masterbatch is not a fixed value and needs to be adjusted comprehensively according to the type, processing technology, and performance requirements of plastic products. The core is to reduce raw material costs while ensuring that the product meets various performance standards. For injection molded small parts (such as buttons and small toy parts), the focus is on the toughness and appearance of the product. The addition ratio of calcium carbonate filled masterbatch is usually controlled at 10% -20%, which can reduce some raw material costs without significantly affecting the impact resistance and surface glossiness of the product; If the addition ratio is too high, it will increase the brittleness of the product and make it prone to fracture. For products such as pipes and sheets that require high rigidity and dimensional stability, the addition ratio can be increased to 30% -60%. High proportion addition can not only significantly reduce costs, but also significantly improve the rigidity, heat resistance, and compressive strength of the products, reduce shrinkage deformation after molding. Especially in the production of PVC pipes, calcium carbonate filled masterbatch can also act as a plasticizer to improve processing fluidity. The addition ratio of blow molded products (such as plastic drums and hollow containers) should be between the two, usually 20% -40%. It is necessary to balance toughness and rigidity to avoid insufficient impact resistance of the container due to excessive proportion, which may affect the safety of use. In addition, the performance of calcium carbonate filled masterbatch also affects the addition ratio. High quality products have uniform particle size, good dispersion, and good compatibility with the substrate, which can maintain stable product performance at higher addition ratios; Poor quality products are prone to agglomeration, and even low proportions of additives may lead to rough surfaces and decreased mechanical properties of the products. When using, attention should also be paid to the combination with other additives, such as toughening agents and lubricants, which can further optimize product performance and achieve the dual goals of cost reduction and quality.
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