Dextrin is divided into two categories of yellow dextrin and white
dextrin. Direct roasting derived dextrin commonly known as
"Britannia", also known as roasted dextrin, brown. Acid roasting,
can be decomposed at lower temperatures. The resulting product
color is generally pale yellow or white, said white dextrin.
The main purpose of dextrin is as an adhesive. The warp yarn is
used as a starch additive for dextrin. The purpose is to reduce the
viscosity of the starch and improve the permeability of the slurry.
The starch slurry added with dextrin is easy to desize, but the
adhesion is poor. More brittle. Often mixed with PVA used in
viscose rayon and copper ammonia fiber filament sizing, not easy to
raise when yarn. Synthetic slurries and modified starches are
widely used and dextrins are seldom used in warp sizing
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