Key Stability Challenges in NBR Latex for Dipping Applications

NBR latex is the dominant material for disposable and industrial glove manufacturing due to its oil resistance and mechanical performance. However, dipping applications impose unique stability requirements that differ significantly from coating or adhesive systems.

In a typical glove production line, NBR latex is subjected to continuous circulation, temperature variation, mechanical shear, and repeated contamination from coagulant carryover. These conditions gradually alter pH and ionic strength, directly affecting latex stability.

 common issues in dipping tanks is viscosity drift over time. This is often caused by cumulative ionic contamination, especially calcium and nitrate ions introduced from the coagulant bath. Even small concentrations can compress the electrical double layer around NBR particles and promote aggregation.

Maintaining stable pH is necessary but not sufficient. Control of ionic strength and contamination buildup is equally critical. Regular monitoring and partial tank refreshment are often required to maintain consistent glove quality.

Designing NBR latex systems specifically for dipping stability, rather than short-term laboratory performance, is essential for reliable glove production.

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