Polyvinyl Alcohol Storage — PVOH Tank Selection for Paper, Textile, Films

Storing Polyvinyl Alcohol? Start Here

Polyvinyl alcohol (PVOH) is a versatile, water-soluble polymer used in various industries like paper coating, textile sizing, and construction. It comes in both solid and liquid forms, with the liquid being a viscous solution. When storing PVOH, consider its viscosity, potential for biological growth, and dust-explosion risk if handling the solid form. Proper storage ensures safety and maintains the polymer's quality for industrial applications.

Can you store it in a poly tank?

Yes, poly tanks such as HDPE or XLPE are suitable for storing PVOH solutions. They handle the near-neutral pH and non-corrosive nature of PVOH well. However, ensure that the tanks are equipped to manage the viscosity of the solution and are easy to clean.

Key Issue: Biological Stability

PVOH solutions can be a breeding ground for bacteria and fungi, which can degrade the polymer. To prevent this, biocides are often added for long-term storage. Regular cleaning and maintenance of storage tanks are crucial to prevent contamination.

The safety that actually matters

• Ensure tanks are grounded to prevent dust explosions when handling solid PVOH.
• Use biocides to maintain the biological stability of stored solutions.
• Match gaskets and fittings to manufacturer compatibility charts for optimal performance.

Common questions

Can PVOH solutions be stored outside?

Yes, but ensure the tanks are protected from extreme temperatures to maintain solution stability.

What type of tank is best for food-contact applications?

316L stainless steel tanks are recommended for food-contact applications due to their compliance with FDA regulations.

How do I handle solid PVOH safely?

Use grounded conductive HDPE or aluminum silos to mitigate dust-explosion risks.