PVA is a water-soluble synthetic polymer. It is used in papermaking, textiles, and a variety of coatings. It is white (colourless) and odorless. It is sometimes supplied as beads or as solutions in water. PVA has excellent film forming, emulsifying and adhesive properties. It is also resistant to oil, grease and solvents. It has high tensile strength and flexibility, as well as high oxygen and aroma barrier properties. However these properties are dependent on humidity, in other words, with higher humidity more water is absorbed. The water, which acts as a plasticiser, will then reduce its tensile strength, but increase its elongation and tear strength.

PVA has a melting point of 230 °C and 180-190 °C (356-374 degrees Fahrenheit) for the fully hydrolysed and partially hydrolysed grades, respectively. It decomposes rapidly above 200 °C as it can undergo pyrolysis at high temperatures.

Application: PVA is used as an suspension polymerization aid, as protective colloid, to make polyvinyl acetate dispersions. This is the largest market application in China. In Japan its major use is vinylon fiber production.

Other uses of polyvinyl alcohol include injection moulding of soluble containers for active release of detergents and agrichemicals, paper adhesive with boric acid in spiral tube winding and solid board production, thickener, modifier, in polyvinyl acetate glues, textile sizing agent, Paper coatings, release liner, as a water-soluble film useful for packaging, feminine hygiene and adult incontinence products as a biodegradable plastic backing sheet. 

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