Blown film grade calcium carbonate masterbatch granulator
-d:.--d:. .--r Calcium carbonate has been used as an inorganic filler in plastic filling for many years. In the past, calcium carbonate was generally used as a filler with the main purpose of reducing costs
r and achieved good results. In recent years
r >With widespread use in production and a large number of research findings
r >Filling a large amount of calcium carbonate can also be achieved without significantly reducing the performance of the product
r >Even some aspects will be greatly improved
r such as mechanical properties, thermal properties, etc.
-d:.--d:. .--r
r >Overview of calcium carbonate
- d:.--d:. .--r
r >The calcium carbonate used as filler in plastics is heavy
(
r referred to as heavy calcium
)
r and light
(
r >referred to as light calcium
)
r. Due to different preparation methods
r Light calcium has a large stacking volume
r >Appears to be light
r In fact, there is very little difference in density between the two
-d:.--d:. .- -r
r >Light calcium carbonate.
-d:.--d:. .--r Generally speaking, light calcium carbonate refers to ordinary products that meet the national standard
r standards
r The density of light calcium carbonate is
/>r >~
r
/
r
r >The long diameter is
r ~
r
r >The short diameter is
r～
r
r >The average particle size is
r～
r. The dominant method for producing light calcium in industry is the carbonization method
r i.e.
:
r >
r limestone
r △
r quicklimestone
r
r
r >
(
r
)
r Hydrated lime
r >
r
r Light calcium
%|
-d:.--d:. .--r )
r >Heavy calcium carbonate. It can be made by grinding and classifying natural calcium carbonate minerals such as calcite, marble, and chalk. The heavy calcium carbonate used in plastics today mostly uses calcite as a raw material. Physical properties of calcite
:
r Density
r >～
r
/
r
r >Hardness
(< br/>r Mohs
)
r Solubility
(
r >℃
)
r
/
r Water
r >Decomposition temperature
r ℃. Heavy calcium carbonate used to be called single fly powder
(
r item
)
r >, double fly powder
(
r item
)
r, Sifei powder
(
r >ME
)
r and calcite powder. There is currently no national standard or industry standard for heavy calcium suitable for plastic filling
r However, companies have their own product enterprise standards or control indicators.
)
-d:.--d:. .--
Blown film grade calcium carbonate masterbatch granulator