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1. Dextrin
Adhesives
Presentation by
Primary Information Services
www.primaryinfo.com

2. What is it?
Starch and dextrin are extracted
from corn, wheat, potatoes, or
rice. They constitute the principal
types of vegetable adhesives,
which are soluble or dispersible
in water and are obtained from
plant sources throughout the
world.

3. Manufacturing process
Dextrin adhesives are manufactured by dry-
roasting starch in the presence of an acid
catalyst. Through treatments with heat and
acid, the starch molecules are hydrolyzed into
small fragments, and then repolymerized into
highly branched, readily soluble polymer
molecules of moderate size. Corn starch is
commonly used because of its low cost and
ready availability, although other starches are
also employed.

4. Types
There are three main types of
dextrin adhesives: white
dextrins, canary or yellow
dextrins, and British gums. The
differences are determined by
the roasting time and the
temperature and amount of
catalyst used.

5. Dextrin Adhesives
Ideal for: Laminating,
Product Assembly and Paper
Converting Applications,
Porous Substrates
Dextrin adhesives bond well to
porous surfaces, but are not
water-resistant and have a slow
set time.

6. Data Base on Dextrin
http://www.primaryinfo.com/scope/dextrin.htm

7. Data Base from Primary Information Services
http://www.primaryinfo.com/scope/dextrin-
adhesives.htm

8. Questions?
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Primary Information Services
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