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PVA |
Plastics
www.hantra.com |
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PVA(Polyvinyl Alocohol)
is a water-soluble resin is produced by the hydrolysis of polyvinylacetate which is made by the polymerization of vinyl acetate monomer. It is the most commonly used thermoplastic polymer resin for organic material recovered from archaeological excavations.
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| Characteristic |
- adhesiveness
- heat-sealabl
- film formation property
- emulsifying property
- oil-resistant ability
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 Specifications |
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Appearance |
white granule or powder |
| Specific Gravity |
1.25 ~ 1.32 |
| Bulk density |
0.4 ~ 0.7 |
| pH |
5 ~ 7 |
| Glass transition temperature |
58¡É(P Grade) ¡ 85¡É (F Grade) |
| Melting Point |
150¡190¡É(P Grade), 210~230¡É (F Grade) |
| Thermal stability |
Gradual discoloration about 100¡É; darkens rapidly above 160 ¡É, Gradual decomposition above 180¡Éas melting point is similar to decomposing temperature |
| Oil resistance |
Not soluble in animal, plant and grease oils |
| Storage stability |
Indefinite when protected from moisture |
| Solvent resistance |
Not soluble in organic solvent |
| Acid & alkali resistance |
Softened or soluble in acid and alkali |
| Color(10%solution) |
Less than APHA 20 |
| Particle size |
More than 95% through 14¡120mesh screen |
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Samseongdong, Gangnamgu, Seoul, Korea Tel: 82-2-565-0401 Fax
: 82-2-563-8640
Copyright 2010 Hantra Corp. All rights reserved. hanmin@hantra.com |
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