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Application Range of PVA polyvinyl alcohol

Number of visits: Date:2014年8月4日 09:05

The Application Range of PVA polyvinyl alcohol

 

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.

 

Some other uses of polyvinyl alcohol include:

Paper adhesive with boric acid in spiral tube winding and solid board production

Thickener, modifier, in polyvinyl acetate glues

Textile sizing agent

Paper coatingsrelease 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 biodegradableplastic

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.

 

Fishing PVA is widely used in freshwater sport fishing.

 

Small bags made from PVA are filled with dry or oil based bait and attached to the hook, or the baited hook is placed inside the bag and cast into the water. When the bag lands on the lake or river bottom it breaks down, leaving the hook bait surrounded by ground bait, pellets etc. This method helps attract fish to the hook bait. Anglers also use string made of PVA for the purpose of making temporary attachments. For example, holding a length of line in a coil, that might otherwise tangle while the cast is made.

TypeInfo: Company News

Keywords for the information:Application Range of PVA polyvinyl alcohol 

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