Managing Coagulant Carryover in NBR Glove Dipping Lines

Coagulant carryover is an unavoidable reality in glove dipping processes. Calcium nitrate and calcium chloride solutions inevitably enter the latex tank during repeated dipping cycles.

As divalent calcium ions accumulate, they strongly neutralize the surface charge of NBR latex particles. This leads to viscosity increase, gel formation, and uneven film deposition on formers.

Many production issues attributed to “latex quality” are in fact the result of insufficient coagulant management. Effective strategies include controlling coagulant concentration, optimizing drying conditions, and minimizing drag-out volume.

From a formulation perspective, incorporating latex systems with higher ionic tolerance and carefully selected nonionic stabilizers improves resistance to calcium contamination.

Understanding and managing coagulant carryover is a key factor in maintaining dipping line stability and glove consistency.

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