PVA 2688G
The PVA 2688 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.
Produit Fonctionnalité:
Partial Alcoholysis.
Faible viscosité.
Grades équivalents :
CCP BP-26
Sekisui Selvol 540 - Celanses
Produit Paramètre (spécification)
|
Objet |
PVA 2688G |
|
Hydrolyse (mole%) |
87.0 ~ 89.0 |
|
Viscosité (mPa.s) |
50.0 ~ 58.0 |
|
Volatile(wt%) |
≤5.0 |
|
Frêne (wt%) |
≤0.5 |
|
Valeur du pH |
5 ~ 7 |
|
Pureté (%) |
≥91.5 |
|
Taille des particules |
20~25maille |
Stockage :The product should be stored in a dry and ventilated room with a room temperature of 5-30℃ and stored in batches. Keep away from power, moisture, and sunlight. It is strictly prohibited to store together with volatile chemicals to prevent deterioration due to adsorption.
Transport :Lors du transport, des véhicules propres sont nécessaires, il faut veiller à éviter l'humidité, la pluie et la protection solaire. Manipuler avec précaution pour éviter d'endommager l'emballage. Il est strictement interdit de stocker le produit avec des produits chimiques volatils afin d'éviter la détérioration par adsorption.
FAQ
Q : What’s the property Index of polyvinyl alcohol ?
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 160for 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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