- Natural
adhesives are made from organic sources such as vegetable starch
(dextrin), natural resins, or animals (e.g. the milk protein
casein and hide-based animal glues). These are often referred to
as bioadhesives. One example is a simple paste made by cooking
flour in water.
- Ingredients or
Raw Materials used for production of DEXTRIN ADHESIVE are
dextrin powder, potassium or sodium hydroxide, borax and water.
- 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. Starch and dextrin glues are used
in corrugated board and packaging and as a wallpaper adhesive.
- 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.
- Unlike starch,
dextrins are soluble in water. The severity of the heat and acid
treatment determines the degree of solubility, which is the
basis for classifying dextrins. Finished dextrins are very fine
powder varying in color from pure white to brown.
- 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.
- Dextrins are
often preferred to starch, as they need less or no cooking and
much less water to form the paste. This means that drying time
is reduced and there is little likelihood of mold infection in
warmer climates. As adhesives, dextrins are used in many of the
same applications as starch adhesives. Dextrins are also used as
a core binding material in the manufacture of foundry cores.
Here the main function is to give good green strength and to
prevent deformation of the core before being fired in the oven.
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Basics
- Adhesives
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About Adhesives
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Adhesion Technology
- Starch , Glucose & It
Derivatives
- Production of Dextrins from
Cassava Starch
Product
Information
- Dextrin starch based wall
covering adhesive
Company
Information
- Company -
supplier of adhesives and specialty chemicals
- Company & products
- Company - USA
- Company - India - products
- Company - India -profile
- Company - Mumbai
Technology
- Industrial Starch Chemistry
- Starch and Dextrin Based
Adhesives
- Carbohydrate Polymers as
Adhesives
- Borates in starch and dextrin
adhesives
- Boron in Adhesives
- Method of Starch Oxidation
- Calculating starch adhesive
solids
- Code of practice for use of
adhesives in the manufacture of packaging materials and sealing
packages
- Company - offer
of technical details
Project
Information
- Project profile - sample as
guide
- Adhesives
preparation system
- Automatic Gum Powder Processing
Plant to produce Pasting, Corrugation & Dextrin Gum Powder
- Liquid Adhesives Plant
- Adhesives Testing
Patents
- Silicate dextrin based adhesive
compositions
- Starch based
adhesives Compositions
Applications & Market Scenario
- Starch for Corrugating
- Consultant -
Market reports
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