Calcium Carbonate

Calcium carbonate is used in paper mill as a filler material in the alkaline papermaking process. Now a days Calcium carbonate dominant over other papermaking filler materials; though at the first stage of papermaking kaolin was 1st choice. The main reason behind the preference of calcium carbonate is the demand for brighter and bulkier paper.

There are significant benefits to the use of calcium carbonate in the al┬Čkaline papermaking process. But Calcium Carbonate filler is unsuitable in acid papermaking and wood-containing paper.

Usually Calcium carbonate occurs in three natural forms such as limestone, chalk and marble. Naturally it is forms between the reactions of calcium salt and carbon dioxide. This process is still going on in the Oceans.
There are two types of calcium carbonate used in paper mill – ground calcium carbonate (GCC) and precipitated calcium carbonate (PCC).

Ground calcium carbonate (GCC)
Ground calcium carbonate is manufactured by grinding limestone or marble because of their high brightness and purity. Generally the particle shape of ground calcium carbonate is rhombohedral. This filler material is used in alkaline wood free papermaking process. The brightness of GCC is 86-95%.

Advantages of Ground calcium carbonate (GCC)
GCC is cheaper and it has high brightness.
GCC creates a porous surface on the paper sheet due to its rhombohedral particle shape.
GCC is hydrophobic as a result it is liberate water more rapidly.
Improve printability
Lower binder demand

Disadvantages of Ground calcium carbonate (GCC)
The rough particle shape of GCC creates a problem; it is more abrasive and shortens the life of paper machine clothes.

Precipitated calcium carbonate (PCC)
Precipitated calcium carbonate is the form of CaCO3 which is manufactured by chemical reactions and the process is known as carbonation process. PCC improve the drawback of GCC, it is provide better gloss and opacity properties for the paper. Because of the structure of PCC is different from the structure of GCC. The crystal structure of PCC are needle-shaped, rhombohedral(cubic), scalenohedral (triangular) and prismatic. The brightness of PCC is 90-97%.

Advantages Precipitated calcium carbonate (PCC)
Increase machine speed and productivity.
Improve water drainage
Improve machine runnability
Improve print quality
Cost-effective papermaking process
Increased opacity and brightness
PCC is less abrasive than GCC
Reduce fiber consumption compared with GCC or talc
More retention compare than other paper fillers

Disadvantages Precipitated calcium carbonate (PCC)
PCC containing paper sheets are poorer formation than GCC containing paper sheets.

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15 Responses to Calcium Carbonate

  1. taaher says:

    I intrested to investigation for production paper from CaCO3. I need knowledge theqenical

  2. Soodabeh says:

    I am intereted in producing paper from calcium carbonate. I need some information. I want to investigate about it. Thanks so much

  3. davood hosseini says:

    I am intereted in producing paper from calcium carbonate. I need some information. I want to investigate about it. Thanks so much

  4. vijay says:

    I have one doubt , in paper production pcc and gcc added in which part of process.

  5. Is anybody making paper with a 60% CaCo3 mix?

  6. Elias says:

    I am intereted in producing paper from calcium carbonate. I need some information. I want to investigate about it. Thanks so mu

  7. Julian says:

    Hi, can you please contact me to discuss making tissue paper with PCC. Many Thanks, Julian

  8. john says:

    I am intereted in producing paper from calcium carbonate. I need some information. I want to investigate about it. Thanks so much

  9. sunil shinde says:

    WE HAVE SMALL PAPER INDUSTRY ,WE USE OFTEN AS FILLER CALCIUM CARBONATE , ITS RESULTS ARE SATISFACTORY , TO IMPROVE BRIGHTNESS ,WHITENESS .

  10. sunil shinde says:

    I WOULD LIKE TO MAKE PAPER FROM CALCIUM CARBONATE AS A FILLER

  11. PC ACHARYA says:

    I wish to start manufacturing GCC/PCC paper. Any one who can help, may please contact me : pca.1956@gmail.com

  12. Ghaleb Ghalayini says:

    Interested in supplying calcium carbonate from Turkey.
    Pls advise list of Danish cos. Purchasing calcium carbonate on Tender basis

  13. Rajeev Saxena says:

    If we wrapped the shoe with tissue paper can it migrate on shoe??

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