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Cables are important components of the power industry and electronic products, and they are widely used in power transmission and distribution, communications, construction, etc. The quality and performance of cables directly affect the safe and reliable operation of power system and the stability of electronic product performance. Calcium carbonate (CaCO₃), an inorganic compound, can be used as a functional filler in cable materials. Its application is mainly concentrated in the insulation layer, sheath layer and other polymer materials.
The role of calcium carbonate in cables
● In PVC cable material
Calcium carbonate is used as a core filler in PVC cables. Its main functions include:
① Reduce costs
As a cheaper filler, calcium carbonate can replace high-priced resin materials and reduce formulation costs. For example, the usage in PVC cable granules can reach 10%-15%.
② Improved processing performance
Improve the fluidity of PVC, reduce the viscosity during processing, and make extrusion molding more stable.
③ Enhance mechanical properties
Adding calcium carbonate in appropriate amounts can improve the hardness, rigidity and dimensional stability of PVC cables, but excessive amounts will reduce flexibility.
④ Flame retardant auxiliary
Calcium carbonate itself is non-flammable, and it can absorb heat when decomposed at high temperatures (decomposition temperature is about 825°C), which can delay combustion.
● Polyethylene (PE), polypropylene (PP) and other resin-based materials
Calcium carbonate can improve the structural strength of cables by stabilizing dimensions, enhancing hardness and surface gloss.
● Environmentally friendly cables
As the demand for lead-free and halogen-free cables grows, ultra-fine calcium carbonate has become a key component to replace traditional materials due to its environmentally friendly properties.
Differences in performance of different types of calcium carbonate
— Light calcium carbonate (precipitation method)
It is with high whiteness (≥90%), low density, and is suitable for insulation layers with high requirements for transparency and dispersion.
The limitation is that the processing fluidity is poor, which can easily lead to difficulties in extrusion of the sheath material.
— Ultra-fine Heavy Calcium Carbonate (grinding method)
It is with high cost performance, low oil absorption, and it can improve the processing performance of sheath materials, and meets environmental protection requirements. Ultra-fine heavy calcium is mostly used in sheath layers and filling layers. Replacing light calcium carbonate with heavy calcium carbonate can reduce costs while maintaining stable performance.
The limitation is that its dispersibility is poor, which may affect the surface finish.
— Nano calcium carbonate
Nano calcium carbonate can improve the toughness and conductivity of composite materials in rubber-based cables.
— Surface modified calcium carbonate
By treating with coupling agents (such as: titanates and silanes), calcium carbonate can improve its compatibility with polymer matrix and avoid agglomeration.
Qingdao Epic Powder Machinery Co., Ltd. bir üretici toz işleme ekipmanları üretiminde uzmanlaşmıştır. Our products include: air classifier mill, bilyalı değirmen, valsli değirmen, jet mill, various hava sınıflandırıcıları, powder coating and modification equipment and related auxiliary equipment. Our powder coating and modification equipment includes: pim-değirmen değiştiricisi, üç rotorlu değirmen değiştiricisi Ve turbo-değirmen değiştiricisi. They are with high modifying efficiency and well praised by customers. And they are very suitable for surface coating and modification of calcium carbonate.
Çözüm
As the cable industry continues to improve its requirements for material performance, cost and environmental protection, calcium carbonate (CaCO₃) , as a key functional filler, has a very broad application prospect. In the future, calcium carbonate will not only be a “cheap filler”, but will become a “value enabler” for high-performance cables through technological innovation.
As a powder processing equipment manufacturer with rich experience and technical accumulation, Epic Powder can provide customers with one-stop solutions from equipment selection, solution design to installation and commissioning, and after-sales service. If you need modification equipment to modify calcium carbonate or other materials, or need other powder processing equipment, please personelimizle iletişime geçin directly, and we will provide you with professional services.
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