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DEXTRENE
Introduction:-
Dextrins are
prepared by heat treatment in presence of chemical characteristics and
properties of starch .They are intermediate between starch and sugar
derived from starch, which find application in dyes.addhesives,
fondaries and other industries
Description:-
Unlike starch
dextrin are soluble in water .The severity of the treatment determines
the degree of solubility ,which is the basis of classifying or grading
dextrin finished dextrin are very fine powder varying in colour form
from pure white to light yellow.
Specification:-
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Description
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White Dextrin
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Yellow Dextrin
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Appearance
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White / Crème White
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Yellow Powder
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Moisture soluble
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10 to 12
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10 to 12
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pH
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2.5 to 3.0
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2.5 to 3.0
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Acidity for 5gms using NaOH
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1.00ml
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3 to 4ml
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Mesh size-pass through 85 mesh
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99.80
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85.00
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Insoluble
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2 to 3
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2
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Soluble
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50 to 60
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90
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Applications:-
Adhesive Industries:
The Adhesives
Industries uses large amount of yellow dextrin in the preparation of
liquid and dry adhesives. Dextrin goes in to the solution instantly and
with a lesser quantity of water, because of their greater adhesive
strength and fluidity.
Dextrin is widely used in the manufacture of:-
- Manufacture of spiral convolute tubes.
- Carbon paper manufacturing, abbresive and in dry distemper.
- Machine labeling of tins /cartoon packages envelop corrugated boxes.
- Also used by crackers manufacture due to adhesives properties & also explosive character
- In Paper tubes and paper cones.
- In book binding cartoon sealing cigrates pasting match head and matchbox making.
- As core binder in Refractory and foundry operations.
Chemical & Dyes Industries
The advantage of
dextrin in the dye stuff industries are so well recognized that good
many large scale manufactures have taken to using highly soluble
dextrin as diluents to standardized the dyes with respect to the range
of colour. Dextrin washes out quickly and easily and do not react with
chemicals used in the process
Foundries
Yellow dextrin
serves as an excellent binding agent for sand core s in foundry
operation s. It gives high green bond strength necessary for the mould
to remain intact during handling.
Textile Industries
As dextrin do not
easily react with chemicals, they are specifically suitable for
application in the textile field. In Textile printing, they are used as
thickener. Free of grit and other impurities, which usually accompany
lower grade of starch, they ensure that the copper rolls (used in
printing) do not suffer from abrasion. In sizing, they are used with
starch for increase adhesiveness. In finishing, they give desired feel
to the fabrics
Color Industries
Dextrin is largely
used in dry distemper. Two to three % of dextrin, mixed with with chalk
and pigment, acts as carrier and impact good adhesion of the color to
the wall.
Packaging
White & Yellow dextrin is available in 25-50Kgs. Plastic lined HDPE woven bags
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