Paper PAM Purchase: Check Compatibility with Starch and Sizing Before Approval

A retention or strength PAM enters a wet end that already contains other materials. Identify starch, sizing chemistry, fixing agents and retention components with their form, current consumption and addition points. State which function the new product is intended to provide and which existing quality limits must remain unchanged.

Do not assume that charge labels alone establish compatibility or that a new PAM is a direct replacement for another functional additive. The supplier should identify any required change in sequence or partner chemistry before the first comparison is priced as a simple product substitution.

Prepare the actual stock and additives with consistent concentration, temperature, contact and shear. Compare incumbent and candidate under the existing order before evaluating a redesigned program. Record preparation and active basis so a difference in solution quality is not mistaken for a chemistry interaction.

If the proposed sequence changes, label it as a separate condition and assess whether the plant can implement it. Adding all components together for convenience can obscure the interaction the purchase needs to evaluate. Keep both adverse and successful results with the sample codes.

Read retention, drainage, white-water response and formation alongside the relevant sizing and strength tests chosen by the mill. Follow the applicable conditioning and test methods. A better retention result does not establish that sizing efficiency or finished-paper quality has been preserved.

Confirm the candidate over representative machine periods and record changes in other additive consumption. Do not assign savings to starch or sizing reduction unless that reduction has been separately demonstrated at acceptable quality. An untested commercial assumption should remain an open question rather than a claimed benefit.

Send the complete chemical schedule, stock condition, paper grade and acceptance methods with the sample request. Ask for documents and a bounded quantity linked to the offered production identity. Separate additional service or control requirements from the material quotation.

Keep the approved partner products and addition architecture with the purchase record. Re-screen after changes that materially alter those interactions, including starch, sizing or furnish. A useful supply approval describes a demonstrated combination, not unrestricted compatibility with every wet-end additive.

Keep the related operating qualification with the purchase record. Further checks include Dual Retention System Quotes: Replace One Component Without Losing the Baseline and PAM and Starch Dry-Strength Programs: Compare the Combination Before Buying.

Request coded material through the papermaking PAM sample and quotation brief. Include paper grade, furnish, additive sequence, preparation limits, acceptance method, quantity and destination. Separate demonstrated results from conditions still awaiting a trial.