ПВА 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.
Продукт Особливість:
Частковий алкоголізм.
Низька в'язкість.
Еквівалентні оцінки:
CCP BP-26
Sekisui Selvol 540 - Celanses
Продукт Параметр (Специфікація)
|
Пункт |
ПВА 2688G |
|
Гідроліз (моль%) |
87.0 ~ 89.0 |
|
В'язкість (мПа.с) |
50.0 ~ 58.0 |
|
Летюча (wt%) |
≤5.0 |
|
Ясен (wt%) |
≤0.5 |
|
Значення pH |
5 ~ 7 |
|
Чистота (%) |
≥91.5 |
|
ParticleSize |
20~25сітка |
Сховище: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.
Транспортування:Під час транспортування потрібно використовувати чисті транспортні засоби, звертати увагу на захист від вологи, дощу та сонця. Поводьтеся з обережністю, щоб запобігти пошкодженню упаковки. Категорично забороняється зберігати разом з летючими хімічними речовинами, щоб запобігти погіршенню адсорбції
ПОШИРЕНІ ЗАПИТАННЯ
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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