NBR, or nitrile rubber, is derived from the emulsion polymerization of butadiene and acrylonitrile. To enhance the physical and mechanical properties of the wet gel and vulcanizate, many NBR latex products have been modified using third-party monomers containing carboxyl groups during the copolymerization process. Common carboxyl monomers include acrylic acid and methacrylic acid. By introducing these carboxyl monomers, the bonding strength and overall quality of the NBR product is improved.
By incorporating carboxylated nitrile latex into the production process, the mechanical stability, oil resistance, and aging resistance of latex can be greatly improved. The production process begins with handmold cleaning, followed by the handmold oven and coagulant bath. Next, the latex is heated in an oven and then transferred to the first emulsion bath, followed by another oven cycle and a second emulsion bath. The latex is then washed, another oven cycle is completed, and the material is curled before being transferred to the main oven for further processing. After cooling, the latex is immersed in a chlorine bath and then neutralized and washed with water. It is then treated with a Pu bath before being subjected to a final oven cycle. Following demoulding, the product is inspected, packed, and stored prior to undergoing final shipment inspection and being shipped out. Overall, the addition of carboxylated nitrile latex to the production process allows for the creation of higher quality latex products with improved performance properties.
