The PVA 2488G (2488 Granule) production facilities of our company have been perfecting day by day with the long-term absorption and technological transformation on the basis of importing the complete set of technology from European Company. PVA produced by our company is good in performances and stable in quality. It enjoys a great reputation both at home and abroad.
製品の特徴
部分的アルコール分解。
粘度が低い。
同等の成績：
088-50
Kururay PVA-224
Kururay Mowiol 47-88
CCP BP-24
Sekisui Selvol 350 – Celanses
JVP JP-24
Nichigo GH-22
製品 パラメータ（仕様）
|
項目 |
PVA 2488G |
|
加水分解 (mole%) |
87.0 ~ 89.0 |
|
粘度 (mPa.s) |
44.0 ~ 50.0 |
|
揮発性(wt%) |
≤5.0 |
|
灰（wt%） |
≤0.5 |
|
pH値 |
5 ~ 7 |
|
純度（%） |
≥91.5 |
|
Particle Size |
20~25メッシュ |
ストレージ： 本製品は、室温5～30℃の乾燥した換気の良い室内で、まとめて保管する。電源、湿気、日光を避けて保管する。吸着による変質を防ぐため、揮発性の薬品と一緒に保管することは厳禁である。
交通機関： 輸送の際は、清潔な車両が必要であり、湿気、雨、日焼けを避けるよう注意を払う必要がある。包装の破損を防ぐため、取り扱いには十分注意してください。吸着劣化を防ぐため、揮発性の薬品と一緒に保管することは厳禁である。
よくあるご質問
Q: ポリビニルアルコールの特性指数は何ですか？
A: Polyvinyl alcohol PVA is a solid substance, colorless and scentless in the shape of floccus, flake or granule. As it contains plenty of hydroxyl groups in its molecule, PVA is easily soluble in water as well as in organic compounds also containing hydroxyl such as glycerol, glycol, acetic acid, acetaldehyde and benzoic acid, except for general organic solvents in which it is insoluble. When heated up to 130-140℃, PVA gets yellow without essential changes in nature; when at 160℃ for a longer time, it gets darker; at 200℃, inter-molecular dehydration takes place with lower water solubility; at above 200℃, intra-molecular dehydration takes place; nearly at 300℃, PVA is decomposed into water, acetic acid, acetaldehyde and crotonaldehyde. The bulk densities of PVA vary depending on methods of alcoholysis: 0.2~0.27g/ml for high alkali alcoholysis and 0.42~0.52 g/ml for low alkali alcoholysis.
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