Calcium Carbonate CaCO3 Limestone power…

Calcium carbonate (CaCO3) is the most widely used filler in polymer formulations. As a filler, calcium carbonate allows cost reduction and improved mechanical properties. It is found in sedimentary rocks (chalk, limestone), marbles and minerals (dolomite). Some typical properties are: density 2.7-2.9 g/cm3; pH of water suspension 9; particle size 0.2-30 μm; oil absorption 13–21 g/100 g; specific surface area 5–24 m2/g.

1. What is CaCO3 Powder?

CaCO3, full scientific name is calcium carbonate, is a very common chemical compound in nature. They are present in the structural material of many organisms (the shell/hard shell of oceanic organisms such as oysters, snails, pearls, snails, eggshells) as well as many geological forms. The most common and well-known source of CaCO3 is from limestone ores, a sedimentary rock usually formed near waterfalls or springs. This is also the main source of this plastic additive. In addition, one can also find calcium carbonate in a number of other minerals and rocks such as chalk, marble or marble.

From what sources is CaCO3 plastic additive?

Most CaCO3 used in industry, especially as an additive in the plastic industry, is mainly mined from quarries (marble quarries) or rocky mountains (limestone mountains). In addition to exploiting natural limestone sources, there is another source of calcium carbonate which is an artificial product produced from the reaction of CO2, water and quicklime (CaO).

CaCo3 Powder

1.1 Classification of stone powder

CaCO3 is a common substance, making up more than 4% of the earth’s crust and is found all over the world in the form of chalk, limestone, and marble formed from the deposits of fossil shells, shells, and shells. and coral over millions of years. Although the above-mentioned rocks are similar in chemical composition, they differ widely in purity, thickness, whiteness, and uniformity.They include uncoated stone powder and steraric acid coated stone powder


Chemical compossitions

Physical properties

CaCO3 conternt: ≥98%


MgO content: ≤0,2%

Moisture Content(AND ML 50) :<0,25 ± 0.03%

Fe2O3 content <0,01%

pH(HANA Ph 211):9,0 ± 1,0

Al2O3 content <0,1%

DOP Absorption : 21 ± 2(ml/100g)

SiO2 content <0,05%

Particle size: customer’s requested

CuO content <0,001%



Chemical compossitions

Physical properties

CaCO3 conternt: ≥98%

Density: 2.7g/cm3

MgO content: ≤0,160%

pH  8,0/ 9,0

Fe2O3 content: ≤0,010%

Ratio of coated  >99%

TiO3 content: ≤0.004%

Ratio of Acid/ CaCO3  >1.1%

Al2O3 content: ≤0,04%

Loss ignition ≤43,80%

SiO2 content: ≤0,01%

Insoluble residue ≤0,15%

Na2O3 content:≤0,016%

Oil level ≥30 ± 3ml/100g CaCO3


Moistrue ≤0,1%

1.2 Applications of stone powder

CaCO3 stone powder is generally widely applied in many industries such as:

Paint and plastic manufacturing industry

CaCO3 powder is used as a perfect additive and main filler in coating industry due to its smoothness, high brightness and low oil absorption. In addition, CaCO3 powder also has good dispersion, stability in the environment, low abrasion ability, stable pH, which helps to improve environmental corrosion resistance and improve product viscosity.

CaCO3 also helps to increase the optical ability of the paint and the weight of the paint, so they can account for up to 60% of the paint content.

Plastic manufacturing industry

Similar to the paint industry, the role of CaCO33 in the plastic industry is also as a filler in the production of PP, PE, and PS plastic additives. PVC…

Paper manufacturing industry

CaCO3 has two roles in the paper industry: as a filler and as a coating agent. Using CaCO3 will help paper with higher whiteness, opacity and gloss, increasing the ability to print at the lowest cost.

Other industries such as:

  • Detergent manufacturing industry:
  • Building and construction materials
  • Ceramic industry
  • Glass manufacturing industry
  • Livestock industry
  • Environment treatment

What role does limestone powder play when used as an additive in the plastic industry?

– CaCO3 has a natural whiteness, so plastic products using CaCO3 fillers will achieve high whiteness without using bleaching, whitening or other coloring agents. This saves a lot of money for the manufacturer

– CaCO3 is a mineral source with abundant reserves in nature, easy to exploit and process, so their price is very cheap. Manufacturers can use calcium carbonate in large quantities without worrying about cost

– Mixing limestone powder into primary plastic will not change the specific properties of primary plastic, so using them to replace a part of input materials in the production of plastic products will help manufacturers save money. Save a lot of money

– Besides, CaCO3 has good heat resistance, curvature texture, size suitable for many types of plastic.

– Environmentally friendly, can prevent evaporation and lower the temperature in the production plant

– CaCO3 helps to increase the hardness and glossiness of the product’s surface, helping manufacturers to print more beautiful and diverse packaging and designs.

– Can be used in combination with other plastic additives and colorants comfortably

Ceiling Panels/Frames/Plastic Doors:

Stone powder (CaCO3) is widely used in hard PVC plastic and is most used in the production of plastic pipes and ceiling panels. Using Calcium Carbonate products increases product durability and dispersion in plastic chemicals. better, product gloss is achieved optimally, improving the production process. Therefore, stone powder (CaCO3) is an indispensable material

PVC pipes and plastic accessories:

Non-pressurized polyolefin pipes and fittings

Using the product Stone Powder (CaCO3) in polyolefin resin will create higher hardness, improve the production process, shorten the time and reduce the cost. In accessories mainly increase profits.

Pressure resistant PVC pipe

This type usually uses stone powder (CaCO3) with a low content because to make the pipe product withstand the highest pressure, the product surface is the smoothest and withstands surface impacts.

Power cable :

In polyolefin plastic cables, stone powder (CaCO3) is increasingly used for the purpose of reducing costs, besides stone powder (CaCO3) can be considered as a flame retardant (if combined correctly with the resin and additives). other).


Stone powder (CaCO3) is widely used in the production of thin films to the production of thick sheets, increasing chemical properties and improving production productivity. Stone powder (CaCO3) reduces production costs, increases hardness and durability in filling products.

Breathable plastic film

Using stone powder (CaCO3) in the production of evaporative plastic film products with tiny holes has outstanding advantages, especially related to hygiene, stone powder (CaCO3) is the active agent in case of This provides the membrane with special properties that allow evaporation through a system of tiny pores.

Molded products

When using stone powder (CaCO3) in the production of casting products, the hardness and durability will be improved leading to cost savings

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