In modern industrial applications, heavy calcium carbonate (heavy calcium) is a common filler widely used in plastics, rubber, coatings, and other fields. In particular, 1250-mesh heavy calcium, due to its fine particle size and large surface area, is especially important in these applications. A key parameter of heavy calcium is its oil absorption, which directly affects the rheology, strength, and processing properties of the product.

In modern industrial applications, heavy calcium carbonate (heavy calcium) is a common filler widely used in plastics, rubber, coatings, and other fields. 1250-mesh heavy calcium, in particular, is especially important in these applications due to its fine particle size and large surface area. A key parameter of heavy calcium is its oil absorption, which directly affects the rheology, strength, and processing properties of the product.

　　Basic Properties of 1250-Mesh Heavy Calcium

　　Heavy calcium, also known as heavy calcium carbonate, is an inorganic powder material prepared from natural calcium carbonate ore through mechanical crushing, sieving, and other processes. Its particle size determines its application in different fields; 1250-mesh indicates an average particle size of around 10 micrometers.

　　1250-mesh heavy calcium has the following significant characteristics:

　　Fine particles: 1250-mesh means that the heavy calcium powder has been finely ground, with small particle size, suitable for products requiring a high surface smoothness.

　　Stable chemical properties: Heavy calcium itself is chemically stable, insoluble in water and organic solvents, and does not react with other substances in most cases.

　　Good dispersibility: Heavy calcium with a finer particle size is easily dispersed in the medium, especially suitable for industries such as coatings, rubber, and plastics that have high requirements for filler dispersibility.

　　Concept of Oil Absorption and Oil Absorption Characteristics of Heavy Calcium

　　Oil absorption refers to the ability of a powder material to absorb a certain amount of oil under certain conditions, usually expressed in g/100g. For heavy calcium, the oil absorption directly affects its dispersibility and processing performance in different substrates. High oil absorption means a larger surface area, making it easier to adsorb organic matter, which usually affects its rheology and filling performance in rubber and plastics.

　　The main factors affecting the oil absorption of heavy calcium include:

　　Particle size: The smaller the particle size, the larger the specific surface area of the particles, and the greater the oil absorption. The oil absorption of 1250-mesh heavy calcium is relatively larger than that of coarser heavy calcium.

　　Surface modification: If the surface of heavy calcium is treated, such as adding a coupling agent or surface coating, it may change its oil absorption. The modified heavy calcium will have more controllable performance in different media.

　　Particle morphology: The morphology of heavy calcium particles, such as whether the particles are approximately spherical, flaky, or irregular in shape, will affect their ability to adsorb oily substances.

　　Oil Absorption of 1250-Mesh Heavy Calcium

　　For 1250-mesh heavy calcium, its oil absorption is generally between 25-35 g/100g. The fluctuation of this value depends on the specific production process, the source of raw materials, and the surface modification.

　　From this value, it can be inferred that 1250-mesh heavy calcium, in applications in plastics and coatings, can provide good filling properties without significantly affecting the material's flowability and dispersibility. Heavy calcium within this oil absorption range usually exhibits the following application characteristics:

　　Improve material strength: Appropriate oil absorption helps the filler bind to the substrate, thereby improving the strength and toughness of the material.

　　Improve processing performance: An appropriate amount of oil absorption can optimize the material's flowability, making it exhibit better rheology during processing and reducing mechanical wear.

　　Cost advantage: Compared with high-oil-absorption nano-calcium carbonate, 1250-mesh heavy calcium has moderate oil absorption and lower cost, suitable for large-scale industrial production applications.

　　Influence of Oil Absorption on Industrial Applications

　　1. Application in the Plastics Industry

　　In the plastics industry, heavy calcium is often used as a filler. Fillers with high oil absorption will increase the viscosity of the substrate, thereby affecting the flowability and processability of the plastic. The moderate oil absorption of 1250-mesh heavy calcium allows it to maintain good dispersibility while providing ideal plastic processing performance.

　　In the production of PVC, PE, PP, and other plastic products, an appropriate amount of heavy calcium can improve the rigidity and impact resistance of the products and significantly reduce material costs. In addition, because the oil absorption of 1250-mesh heavy calcium is moderate, it can avoid excessive filling leading to increased brittleness of plastic products.

　　2. Application in the Coatings Industry

　　The coatings industry also has relatively strict requirements for oil absorption. Excessive oil absorption may lead to increased viscosity of the coating, affecting its coating and leveling properties. The oil absorption of 1250-mesh heavy calcium is controlled between 25-35 g/100g, which can well balance the viscosity and fluidity of the coating, making the coating exhibit good fluidity and uniform coating properties during construction.

　　In addition, heavy calcium, as an inorganic filler, can improve the hiding power, abrasion resistance, and weather resistance of the coating, while significantly reducing production costs. For exterior wall coatings, powder coatings, and other products, 1250-mesh heavy calcium is often considered an ideal filler choice.

　　3. Application in the Rubber Industry

　　Rubber products have extremely high requirements for fillers, especially regarding oil absorption. Excessive oil absorption may lead to increased rubber hardness, thereby affecting its elasticity and wear resistance. The moderate oil absorption of 1250-mesh heavy calcium can enhance the hardness of rubber products without significantly affecting its elasticity. Especially in the fields of rubber tires and conveyor belts, 1250-mesh heavy calcium is often used as one of the main fillers to help enhance the wear resistance of rubber.

　　Through the analysis of the oil absorption of 1250-mesh heavy calcium, Xiangfa Powder, a manufacturer of 1250-mesh heavy calcium, believes that its moderate oil absorption gives it broad application potential in multiple industries. Although oil absorption is one of the important indicators affecting material performance, it is not the only determining factor. Production processes, raw material purity, and particle morphology will all have a significant impact on the final product performance.

　　In future industrial production, with the continuous advancement of technology, the surface modification technology and particle size control technology of heavy calcium will be further developed, and the oil absorption will be more controllable, which will provide downstream industries with more diverse choices and higher-quality products.

　　The oil absorption of 1250 mesh precipitated calcium carbonate is moderate, allowing for good processability while significantly improving product performance. This characteristic gives it broad market prospects in numerous fields, including plastics, coatings, and rubber. For relevant companies, the reasonable selection and control of the oil absorption of precipitated calcium carbonate will help improve product quality and optimize production costs.