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High water solubility with rapid dissolution in cold and warm water.
Excellent film-forming capability yielding strong, flexible, and transparent films.
Superior adhesion to polar substrates including paper, cellulose, metals, and ceramics.
Low residual acetyl content ensuring high hydrophilicity and biodegradability.
Consistent batch-to-batch quality supported by Kuraray’s stringent GMP-aligned manufacturing control.
Water-soluble packaging films for agrochemicals, detergents, and industrial cleaners.
Binder for ceramic and metallurgical green bodies in tape casting and injection molding.
Thickener and stabilizer in aqueous pigment dispersions for textile printing pastes.
Protective colloid in emulsion polymerization of vinyl acetate and acrylic monomers.
Temporary binder in nonwoven fabrics and fiber sizing applications.
| Chemical Type | Polyvinyl alcohol (fully hydrolyzed) |
| Product Form | White granular powder |
| Appearance | Free-flowing, odorless granules |
| Saponification Degree | ≥ 98.0 mol% |
| Viscosity (4% aqueous solution at 20°C) | 16–18 mPa·s |
| Residual Acetaldehyde Content | ≤ 0.5 ppm |
| pH (1% aqueous solution) | 5.0–7.0 |
| Volatiles (105°C, 2 h) | ≤ 5.0 wt% |
Q1: What is the typical degree of hydrolysis and viscosity profile of POVAL PVA 117?
A: POVAL PVA 117 is a fully hydrolyzed polyvinyl alcohol grade with a nominal degree of hydrolysis above 99%, offering high water solubility and excellent film-forming capability. Its aqueous solution viscosity is moderate, supporting good processability in coating, sizing, and binder applications without excessive gelation or stringiness.
Q2: How does POVAL PVA 117 perform in aqueous adhesive formulations?
A: POVAL PVA 117 delivers strong initial tack and cohesive strength in water-based adhesives, particularly for paper, cardboard, and textile bonding. It provides excellent green strength and compatibility with common additives such as plasticizers, starch derivatives, and crosslinkers—enabling formulation flexibility for both cold-set and heat-activated systems.
Q3: Is POVAL PVA 117 suitable for use in pharmaceutical or food-contact applications?
A: POVAL PVA 117 is manufactured under stringent quality control and meets general requirements for technical-grade PVA used in non-implantable pharmaceutical excipients (e.g., tablet binders or film coatings) and indirect food-contact applications—subject to final formulation validation and compliance with applicable regional regulatory expectations.
Q4: What are key handling and dissolution considerations for this grade?
A: For optimal dissolution, gradual dispersion into cold water with continuous agitation is recommended to prevent surface gelation. Full dissolution typically occurs upon gentle heating to 80–90 °C. The powder should be stored in a cool, dry environment to avoid moisture uptake and caking, and solutions should be used promptly or preserved against microbial growth when stored.
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