EN
PVA 17-99（100-27）（Shuangxin）
Description
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Old Standard Grades Name
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New Standard Grades Name
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Item |
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Hydrolysis (mol%) |
Viscosity (mpa.s) |
Volatile (%≤) |
Ash (%≤) |
PH (Value) |
Purity (% ≥) |
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17-99 |
100-27 |
99.0-100.0 |
22.0-32.0 |
≤5.0 |
≤0.5 |
5~7 |
≥93.5 |
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17-99L |
098-27 |
98.0-99.0 |
21.0-32.0 |
≤5.0 |
≤0.5 |
5~7 |
≥93.5 |
(1) Solubility: hydrophilic, easily soluble in water (generally dissolved in hot water above 90℃), insoluble in almost all organic solvents.
(2) Film formation: easy to form film, the mechanical properties of the film is excellent. In addition to H2O, PVA film has excellent resistance to H2, N2, O2 and other gases.
(3) Adhesion: good adhesion with hydrophilic cellulose, paper, etc.
(4) Thermal stability: when the 17-99 flake is heated to more than 130℃, the appearance gradually changes. Fully hydrolysed PVA begins to melt at about 230℃ and decompose above 200℃.
(5) Solvent resistance: PVA has strong resistance to weak acid and weak alkali, and has good oil resistance.
(6) Reactivity: with excellent cross-linking reactivity, can cross-link with boric acid, acetal reaction with formaldehyde, acetaldehyde, etc., the product has water resistance.
