Dissolving Procedure

The following procedure is recommended to dissolve Polyvinyl Alcohol or POVAL.

1. Feed water into a tank at ambient temperature (Water temperature should not be so high in order to avoid agglomeration.).

2. Feed POVAL gradually into the water with agitation and disperse it sufficiently. 　Especially low hydrolyzed grade should be taken care of.

3. Heat up with continuous agitation and dissolve the POVAL. More than 90 degree-C for minimum 30 minutes is recommended.

4. Add water to adjust the concentration after complete dissolution of POVAL. Actual concentration should be measured due to the water contained in POVAL.

5.If the grade has clouding point, cool down the temperature under the clouding point before use. Especially low hydrolyzed grade should be taken care of.

USES:

• 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.

• Carbon dioxide barrier in polyethylene terephthalate (PET) bottles

• As a film used in the water transfer printing process

• As a form release because materials such as epoxy do not stick to it

• Movie practical effect and children's play putty or slime when combined with borax

• Used in eye drops (such as artificial tears to treat dry eyes) and hard contact lens solution as a lubricant

• PVA fiber, as reinforcement in concrete

• Raw material to polyvinyl nitrate (PVN) an ester of nitric acid and polyvinyl alcohol.