Poly(vinyl alcohol) (PVOH, PVA, or PVAl) supplier Manali Tamilnadu
Poly(vinyl alcohol) (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer. It has the idealized formula [CH2CH(OH)]n. 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.
Uses
Polyvinyl acetals: Polyvinyl acetals are prepared by reacting aldehydes with polyvinyl alcohol. Polyvinyl butyral (PVB) and polyvinyl formal (PVF) are examples of this family of polymers. They are prepared from polyvinyl alcohol by reaction with butyraldehyde and formaldehyde, respectively. Preparation of polyvinyl butyral is the largest use for polyvinyl alcohol in the U.S. and Western Europe.
Polyvinyl alcohol is used as an emulsion 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. An example is the envelope containing laundry detergent in "liqui-tabs".
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.
As a surfactant for the formation of polymer encapsulated nanobeads
Used in protective chemical-resistant gloves
Used as a fixative for specimen collection, especially stool samples
When doped with iodine, PVA can be used to polarize light
As an embolization agent in medical procedures
Carotid phantoms for use as synthetic vessels in Doppler flow testing
Used[citation needed] in 3D printing as support structure that can then be dissolved away (cire perdue).