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Introduction:
Dextrins
are degradation products obtained by treating starch under
carefully controlled conditions. Dextrins are made by heating
starch in dry form with small amounts of catalyst.
White Dextrin has an appearance of the native starch
and has solubility varying from 25-80%. It forms a soft, light
coloured gel on cooling. Yellow Dextrin ranges in
colour from pale yellow to dark brown and has high water
solubility. It is used to produce high solid concentration
pastes.
Specifications:
|
Grade
|
WHITE
DEXTRIN:
Aw1
|
Aw2
|
Aw3
|
Aw4
|
YELLOW
DEXTRIN:
Ay1
|
Ay2
|
Ay3
|
|
%Moisture Max
|
10.00
|
10.00
|
10.00
|
10.00
|
10.00
|
10.00
|
10.00
|
|
Cold Water soluble on dry basis
|
25-40
|
40-60
|
65-80
|
95-99
|
80-90
|
90-95
|
95-99
|
|
Colour
|
White
to creamy
|
Yellow
to golden yellow
|
|
Free Acidity
|
-
|
5
|
5
|
8
|
6
|
7
|
8
|
PH of 10% Solution
|
3
to 4 or as required
|
-
|
-
|
-
|
|
Sulphate Ash
|
0.4
|
0.4
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
|
Sieve Retention % above 100 mesh
sieve
|
1.0
|
1.0
|
1.0
|
1.0
|
1.0
|
1.0
|
1.0
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Applications:
-
Dextrin does not react with Chemicals.
It is very useful and plays an important role in various
Industries.
-
Textile
Industries: In
textile printing Dextrin is used as a thickener. Copper
rolls get long life with sizing and it increases
adhesiveness in finishing. It also gives the desired feel
to fabric.
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Dyes: Dextrin is used in the Dyestuff
industry as extenders.
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Pharmaceuticals:
Dextrin is used as a nutrient source in
preparations of certain antibiotics.
-
Foundries: For good care binding as a
binder, it imparts great compressive strength. To give
good strength to moulds and to prevent deformation of the
core as it does not make the core too dense. So there are
no trapped gases, which causes blowholes.
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Dry Distemper : Dextrin is largely used in dry
distemper. 2 to 3 % of Dextrin with chalk and pigments act
as a carrier and impart good adhesiveness of colour to the
wall.
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Grinding Wheel: Binder for different constituents
for grinding wheel. Dextrin is also used as binder for
water colour, mineral aggregates, ink /colour binder,
laminates, fibers paper bags & boxes, paper tubes and
cones, postage stamp, gum tape, fireworks, cigarettes,
crayons, polishing dyes, leather linoleum, wall paper in
silvering compounds and so many other industries use
dextrin.
Packing:
In 50/25 kg HM
HDPE bags with inner liner of LDPE
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