Polyvinyl Alcohol Application

Polyvinyl Alcohol products have a wide range of uses. In the textile industry, they are mainly used as yarn pulp, fabric finishing...

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Polyvinyl Alcohol Grades

Polyvinyl Alcohol is manufactured by polymerization of vinyl acetate monomer, followed by hydrolysis of the polyvinyl acetate. HOP...

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Polyvinyl Alcohol Introduction

Polyvinyl Alcohol is a water soluble and biodegradable synthetic polymer. It is adry solid, and is available in granule and powder...

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PVA is usually processed in the form of aqueous solution. Since the solution is slightly acidic (pH 5~7), vessel

should be made of materials, which will not contaminate the solution with corrosive material or rusts. Stainless

steel vessel, enameled containers or polyester tanks are recommended.

The specific gravity of PVA is ranging from 1.26 to 1.31, which is heavier than that of water. Low agitation speed

or unfavorable agitating condition sometimes causes coarse particles to precipitate and to block the outlet of

the dissolving tank. Hence, a flush valve or tank valve is recommended to be installed in the bottom of the vessel to prevent the particles from blocking the discharge line.

(1) Viscosity of a 4 wt % standard grade PVA solution at 20°C which is determined by Brookfield Viscometer

with UL adapter.

(2) Calculated as Na2O

(3) pH is determined by pH meter at 20°C

(4) Viscosity of a 10 wt % tackified grade PVA solution which is determined by Brookfield Viscometer at 25°C

(5) Particle size of standard grades is all passes through 10-mesh screen.

■ High weaving efficiency.Yarns sized with PVA show excellent weaving efficiency with few loom stops.

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