polyvinyl alcohol


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polyvinyl alcohol

A water-soluble synthetic resin used in preparing medicines, esp. ophthalmic solutions.
See also: alcohol

wetting solution 

A solution that (1) transforms a hydrophobic surface into a hydrophilic one; (2) acts as a lubricant; (3) helps to clean the surface; (4) helps to prevent contamination of the lens while being inserted. It is spread on both surfaces of a rigid contact lens prior to insertion. However, the effect of a wetting solution only lasts a short time because it is quickly removed by the tear layer. A common wetting agent is polyvinyl alcohol, which also has viscosity building properties. See enzyme; artificial tears.

polyvinyl alcohol,

n a complex alcohol that is soluble in water and is used as an emulsifier and adhe-sive.
References in periodicals archive ?
Abdel-Rehim, High-Dose Film Dosimeters Based on Bromophenol Blue or Xylenol Orange Dyed Polyvinyl Alcohol.
Proton exchange membrane of polyvinyl alcohol and a hydrated tin oxide: a--the structure, b--exterior membrane M50
The aim of this paper is to present experimental results obtained from bacterial cellulose polyvinyl alcohol composite membranes containing tetracycline clorhydrated as a model drug for transdermal controlled released applications.
But when polyvinyl alcohol is used, tap density increases when the proportion of polyvinyl alcohol reaches 2% by weight, to the highest value as shown in Figure (4), it is found that the size of particulate is small when this ratio is maintained.
Keywords: Composition, Polyvinyl alcohol, Bentonite clay, Hydrogen bonding
This paper presents the results of a feasibility study to determine the material behavior when utilizing RAP in a high strength concrete mix by replacing a portion of the course aggregate by both weight and gradation for RAP and by including Polyvinyl Alcohol Fibers (PVA) in the mix matrix.
Four tenders for the supply of (a) calcium & vitamins among other items, (b) potato starch, (c) photopolymer vinyl acetate, (d) PVA - polyvinyl alcohol.
The nonwoven material is formed from one or more biocompatible polymers such as polyglycolide, polylactide, polycaprolactone, polytrimethylene carbonate, polyvinyl alcohol, and polydioxanone.
Ltd, a global specialty chemical company, has agreed to acquire MonoSol LLC, a market-leading manufacturer of water-soluble polyvinyl alcohol (PVA) films.
Polarizers used in consumer electronics devices require a thin film to protect the brittle polyvinyl alcohol plastic sheet that is the primary component of the polarizer.
Among the topics are shrinkage properties of polymer-modified cement mortars, evaluating the hydration of Portland cement modified with polyvinyl alcohol and nano clay, the mechanical behavior and thermal conductivity of mortars with waste plastic particles, polymer-modified mortars for corrosion protection at offshore wind energy converters, the effect of concrete hydrophobation against chloride penetration, and advanced seismic countermeasures for concrete bridges using polymer in Japan.
a modified polyvinyl alcohol containing an ethylene unit in a proportion of 3 to 20 mol %.