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MICRONIZED ULTRAWHITE NATURAL CALCIUM CARBONATE

Microcal is an ultrawhite micronized natural Calcium Carbonate, for achieving best results at higher loadings in various applications. The product has exceptionally high whiteness and free flowing characteristic and facilitates enhanced processing characteristics at higher loadings. The product is manufactured from high purity mineral of limestone family. The particle structure is spherical and microcrystalline. The product is micronized in latest grinding equipment based on German technology. The product is available in various particle sizes depending on customers requirement.

 
QUALITY ASSURANCE SYSTEM

To offer better quality products the quality is assured at following levels -

Minning
Manual sorting to ensure maximum whiteness in lumps.
Chemical analysis at mines before despatch to works.
Micronizing
Qualified engineers and production personnel to ensure consistency of processing parameters.
Fully equipped analytical laboratory at each works for
  --Particle size analysis.
  --Tests for physical properties like Bulk density, Oil absorption, Brightness etc.

Central Testing & Q. C.

Central lab at headquarter to certify the product, as per the quality standard acceptable in domestic and global market.
UNIQUENESS OF PRODUCT
Unmatchable optical brightness, facilitating reduction in dosage of costly white pigments.
Extremely suitable particle - size distribution to ensure better dispersion and excellent physical properties (e.g. increased impact strength) in various polymers/plastics applications.

Absolutely grit-free ensuring long long life of processing machinery as no wear and tear occurs.

Uninterrupted and smooth production and uniform quality of product.
 

APPLICATIONS

 

Plastics

As a functional filler in -

PVC, HDPE, PP, Eproxy
Polyester, Polyurethane, ABS, Polystyrene and other polymer
 

Paints

As an extender in-

Emulsion Paints

Powder Coating
Alkyd Paints

Paper

As a filler in the body or for surface coating.

 
OTHER APPLICATIONS
PVC Pipes
Master Batches
 

TYPICAL PHYSIOCHEMICAL PROPERTIES OF CALCIUM CARBONATE

Property

Unit

Value

Surface area (BET)

m²/gm

200-225

Average Particle Size

Micron

2.8

pH(2% acqueous solution)

--

9.5-10.5

Moisture loss on drying at 105°C( 2 hours)

%

6.5

lgnition loss at 900°C

% max.

8.0

Water Absorption

%

300-440

Bulk Density*

gm/cc

0.07-0.12

Whiteness

%

95-98

Refractive Index

--

1.47

Specific Gravity

--

2.1

Silica (SiO 2 )

%

78.5

Calcium (CaO)

%

19.2

Chlorides

%

Traces

Sulphate

%

Traces

Lead (pb)

ppm max.

5

Arsenic (As)

ppm max.

2

 

TYPICAL PHYSIOCHEMICAL PROPERTIES OF CALCIUM CARBONATE
   
GRADES

Property

Unit

Microcal-ECO

Microcal-WPS

Microcal-WPS-10

ECO Spl.

ECO Spl. 10

Whiteness

%

92-96

96-98

96-98

94-97

94-97

Top Cut Size (d 97)

Micron

22

12

10

20

10

Average particle size

Micron

6-8

4-6

3-4

6-8

4-6

Sp. Gravity

--

2.7

2.7

2.7

2.7

2.7

Bulk Density*

gm/cc

0.8-1.2

0.8-1.2

0.8-1.2

0.8-1.2

0.8-1.2

Oil absorption

%

20-24

22-25

22-25

20-24

20-24

pH Value

--

8.5-9.5

8.5-9.5

8.5-9.5

8.5-9.5

8.5-9.5

Moisture

% max

0.2

0.2

0.2

0.2

0.2

Total Carbonates

% min

98

98

98

98

98

Total Silicates

% max

0.2

0.2

0.2

0.2

0.2

Free Silica

% max

0.08

0.08

0.08

0.08

0.08

Other Oxides

% max

0.2

0.2

0.2

0.2

0.2

Residue on 500 mesh

% max

0.8

0.5

0.2

1.0

0.2

Packing

Kgs/bag

25

25

25

25

25

 

TYPICAL PHYSIOCHEMICAL PROPERTIES OF CALCIUM CARBONATE
 
GRADES

Property

666-H

999
666

Bulk Volume

80 ML

76 ML
106 ML
Bulk Density .50 .526 .377
Flow Point 18 16 33
Selected Bulk 2.2 2.0 5.2
Fineness 0.1% 0.1% 0.1%
Residue 0.1% 0.1% 0.1%
Colour Snow White Snow White Bright White
Specific Gravity 2.65 2.65 2.65
pH 9.0 9.0 9.5 To 9.8
Moisture .5% .520% .61 To .650
Solution in HCL SN Clear Clear Clear
Soluble Alkali (As Na O) .155% .146% .198%
Phosphate Po Max 0.035% 0.03% 0.045%
Sulphate So Max 0.15% 0.10% 0.170%
Silica Sio Max 0.05% 0.05% 0.05%
MGO Max 0.5% 0.5% 0.65%
Lead Pb Max Nil Nil Nil
Copper C Max Negligible -- --
Arsenic As Max Nil Nil Nil
Chloride As Ci Traces Traces Traces
Calcium Carbonate (Assay) 99.0% 99.0% 98.0%