Why natural calcium carbonate powder is widely used in Filler Masterbatch production?

CaCO3 Powder

Why natural calcium carbonate powder is widely used in Filler masterbatch production?

We commit to delivering the best quality to all our esteemed customers (CACO3: 98.5 %; Whiteness: 98 % min;  Brightness: 96% min)

1. What is CaCO3 Calcium Carbonate

Calcium Carbonate is a chemical compound with formula CaCO3. It is the main component of shells of marine organisms, snails, pearls and eggshells and easily found in all parts of the world. Calcium Carbonate is the active ingredient in agricultural lime and is usually the principal cause of hard water. It is produced by crushing, grinding and classifying high purity, white and calcite limestone. Calcium Carbonate is also called by some other names such as limestone, calcium carbide, chalk, calcite.

2. Classification of Calcium Carbonate

The most application of Calcium Carbonate is for industrial use. There are two types of Calcium Carbonate: Precipitated and Ground Calcium Carbonate. Pure calcium carbonate can be produced from marble, or it can prepared by passing carbon dioxide into a solution of calcium hydroxide. In the later process, calcium is derived from the mixture, forming a grade of product which is called “precipitated calcium carbonate” or PCC. PCC has a very fine and controlled particle size which is of 2 micron and is particularly used in production of paper. The other primary type of industrial product is “ground calcium carbonate” or GCC. Limestone is crushed and processed to create a powdery – like form graded by particle size and other properties for many different industrial and pharmaceutical application. It is ground calcium carbonate powder that we use to manufacture CaCO3 filler masterbatch for different application in plastic packaging products.

Best Quality OF CaCO3 Powder

3. Avantage and application of Calcium Carbonate CaCO3

CaCO3 is seen in various products in our daily life. In general it is widely used as a plastic additives in industrial production for some reasons:

  • The whiteness and brightness measured in CaCO3 is very high. Hence the plastic products that use CaCO3 filler will achieve high brightness and whiteness without using bleach, whitening agent or other coloring additives. This is a cost solution to most masterbatch manufacturers.
  • CaCO3 is available in nature with abundant sources. It is also easy to exploit and process so the manufacturing cost is very cheap.
  • CaCO3 has very good resistance to heat which is suitable to many plastic industries.
  • CaCO3 contribute to increase the hardness and to luster the products surface, which help the manufacturers to produce many beautiful packaging with various designs.

Calcium Carbonate’ performance is seen in many industrial application as bellows:

  • Paper, Plastics, Paints and Coating: Calcium carbonate is used in paper, plastics, paints and coatings industries both as a filler and a coating pigment thanks to its extraordinary whiteness and brightness.
  • Personal health and Food production: Calcium Carbonate is widely used in medicinal tablets production. It is also found on many grocery store or pharmacy stores with products named baking powder, toothpaste, dry – mixed dessert mixes and wine,…Another usage of calcium carbonate is found in animal feeds. It also benefits the environment through water and waste treatment.
  • Building materials and construction: Calcium Carbonate is critical to the construction industry, both as building materials in its own right and as an ingredient of cement.

4. Calcium Carbonate Used in Making Filler Masterbatch

One of the main application of Calcium carbonate powder is to make plastic masterbatch. Below is chemical compositions and chemical properties of Calcium Carbonate powder which is used in manufacturing filler masterbatch:



Content CaCO3

: 98% min


: 96% min

Content Mg CO3

: 0.21% max


: 98% min

Content Fe2O3

: 0.02% max


: 0.2% max

Content Al2O3

: 0.03% max

Water Demand/ml/100gm

: 0%

Content SiO2

: 0.12% max

Oil absorption/ml/100gm

: 26%

Content Na2O

: 0.05% max

P h

: 8 +

Bulk density

: 1g/cm3

Lost content when being burned

: 43.08% max

There are 2 common types of Calcium Carbonate used in making Calcium Carbonate Filler Masterbatch namely Coated CaCO3 and Uncoated CaCO3. Both of these are exploited from limestone or white marble mines with very high purity. This is also the reason why the physical and chemical properties of these two types are not significantly different. The coated CaCO3 only differs from uncoated one that it is coated with fatty acids (stearic acid) and bonding agent on their surface, which leads to the difference in oil absorption of these two type. The uncoated CaCO3 shows oil absorption of 30.08g/ 100g while the coated one gives a number of only 18.71g/100g).

At Us Masterbatch, we use CaCO3 powder which is exploited from quarries in the North of Vietnam which is known as the best resources with very high purities. Whiteness always reaches more than 98% and brightness excesses 96% as minimum. We have all equipment to control the quality of CaCO3 powder used in making filler masterbatch. In order to ensure best quality of CaCO3 powder, we used most advanced equipment such as the mastersizer 3000E from UK’s Malvern, Kolnica Minolta, Ohaus Moisture Analyzer from USA. Whiteness, Brightness and moisture are always tested very carefully before being put into production. We investigated in a large and professional warehouse to keep CaCO3 powder which ensure materials are free from moisture and impurities. As CaCO3 powder is contributing 70 – 85% in the formulation of CaCO3 filler masterbatch, we consider it as proper criteria in reaching high quality supplied to customers.

Vietnam is also famous for CaCO3 powder resources. The exploiting and manufacturing of CaCO3 is very cheap, which bring a cost effective to Us Masterbatch. That is why we can manufacture CaCO3 filler with very high quality and competitive price.

One of very important technical point of CaCO3 is the particle size which ranges from 1 to 6 micron. It plays a vital role in making CaCO3 filler suitable for each application. This affects the smoothness and transparency of PE film, the level of dust in making PP woven sacks,… With our technical team experience, we are knowledgeable in choosing CaCO3 powder particle size suitable for your application. This is also strictly under control of our technical team with the assistance of most modern equipment. Our team will choose best CaCO3 powder to make filler masterbatch based on your production.


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