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High water solubility with rapid dissolution in cold and warm water.
Excellent film-forming capability yielding transparent, flexible, and strong films.
Superior adhesion to polar substrates including paper, wood, and cellulose-based materials.
Low residual acetyl content ensuring high hydrophilicity and biodegradability.
Consistent batch-to-batch quality backed by Kuraray’s stringent GMP-aligned manufacturing control.
Water-soluble packaging films for agrochemicals and detergent pods.
Binders for ceramic and refractory green bodies in advanced manufacturing.
Dispersants and protective colloids in pigment and ink formulations.
Reinforcing agents in paper coating and surface sizing applications.
Base polymer for electrospun nanofibers in biomedical scaffolds and filtration media.
| Chemical Type | Polyvinyl alcohol (partially hydrolyzed) |
| Product Form | White granular powder |
| Appearance | Free-flowing white granules, odorless |
| Saponification Degree | 87–89 mol% |
| Viscosity (4% aqueous solution at 20°C) | 21–24 mPa·s |
| Residual Acetate Content | 11–13 wt% |
| pH (5% aqueous solution) | 5.5–6.5 |
| Moisture Content | ≤5.0 wt% |
Q1: What is the primary functional role of POVAL PVA L-8 in water-based formulations?
A: POVAL PVA L-8 functions primarily as a film-forming binder and rheology modifier in aqueous systems. Its moderate degree of hydrolysis and controlled molecular weight provide balanced solubility, cohesive strength, and adhesion—making it especially suitable for coatings, textile sizing, and paper surface treatments where uniform film integrity and process stability are required.
Q2: How does POVAL PVA L-8 compare to higher-viscosity PVA grades in terms of handling and application performance?
A: Compared to higher-viscosity PVA grades, L-8 offers easier dissolution at room temperature or with mild heating, lower solution viscosity at equivalent concentrations, and improved compatibility with shear-sensitive processes. This makes it well-suited for spray applications, dip-coating, and formulations requiring rapid wetting and minimal foaming without compromising film toughness.
Q3: Is POVAL PVA L-8 compatible with common crosslinkers used in industrial coatings?
A: Yes—POVAL PVA L-8 is compatible with a range of aldehyde-based (e.g., glyoxal) and aziridine-type crosslinkers, enabling enhanced water resistance and thermal stability in cured films. Compatibility and cure efficiency depend on pH, temperature, and formulation matrix, so laboratory-scale optimization is recommended prior to full-scale implementation.
Q4: Can POVAL PVA L-8 be used in food-contact or pharmaceutical-related applications?
A: POVAL PVA L-8 is manufactured under stringent quality control and meets typical purity requirements for indirect food-contact applications (e.g., as a coating aid or release agent in packaging substrates), subject to final regulatory review by the end-user. It is not intended for direct ingestion or as an active pharmaceutical ingredient without further qualification and compliance verification per regional regulatory frameworks.
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E-mail: wangxingqiang@ericwchem.com
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