Poly(vinyl alcohol) (PVOH, PVA, or PVAl) supplier visakhapatnam india

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 in 3D printing as support structure that can then be dissolved away (cire perdue).