Rosin Size Emulsion Papermaking (Acid Wet-End Internal Sizing) Tank Selection

Storing Rosin Size for Papermaking? Start Here

If you're in the papermaking business, you know that rosin size is crucial for adding water resistance to paper products. Whether you're working with fine paper, book paper, or newsprint, understanding how to store this emulsion properly is key to maintaining its quality and effectiveness. Rosin size is usually delivered as a 35-50% solids emulsion, and it's important to keep it stable and ready for use in your processes.

Can you store it in a poly tank?

Yes, you can store rosin size in a polyethylene (poly) tank. Both HDPE and XLPE tanks are standard for this purpose, as they handle the emulsion well and comply with food-contact paper regulations. These tanks are suitable for storing rosin size at various temperatures, making them a reliable choice for your storage needs.

Watch Out for Emulsion Stability

Keeping the emulsion stable is crucial. Rosin size can separate or cream if not agitated gently and continuously. Use mechanical or recirculating-pump agitation to maintain uniformity. Also, protect the emulsion from freezing, as this can affect its quality. Insulated jackets and heat tracing are recommended for installations in cooler climates.

The safety that actually matters

• Ensure continuous gentle agitation to prevent separation.
• Protect against freezing with insulation and heat tracing.
• Regularly clean tanks to prevent rosin deposit buildup.
• Follow food-contact compliance if applicable.

Common questions

Can rosin size be stored in stainless steel tanks?

Yes, both 304 and 316L stainless steel tanks are suitable and often used for high-value or sanitary specifications.

What type of gaskets should be used?

EPDM gaskets are standard, but Viton is also suitable, especially for higher temperature applications.

Is freeze protection necessary?

Yes, rosin size can freeze at sub-zero temperatures, so insulation and heat tracing are essential in cold climates.