The intent of the existing investigation was to formulate Nitrile Butadiene Rubber (NBR)/High Density Polyethylene (HDPE) blends using industrial waste (MW) and compatible with chloroprene rubber (CR). The results indicated that the minimum and maximum torque increased with increasing amount of HDPE in the blends, while the burn and cure time showed a decreasing trend. Increasing HDPE increased tensile strength, modulus, tear strength, hardness, and crosslink density. The percentage of tensile strain, percentage of compressive fixed strain and abrasion loss of NBR/HDPE blends revealed the tendency to decrease with the increase of HDPE level. The CR-based MW-filled mixtures provided the most encouraging equilibrium values ​​of the overall properties. Keywords: Mixtures; NBR; HDPE; mechanical properties; characteristics of treatment; Introduction to Thermal Aging (2013-12-15)Acrylonitrile butadiene rubber (NBR) is an unsaturated copolymer known for five decays [1-2]. It has been used in many industrial purposes such as hoses, o-rings, insulation base products and other packaging materials []. The main components of technically related NBR comprise 24-30 wt% acrylonitrile and include some advantages over other elastomer-like polymers. As good workability, oil and hydrocarbon resistance, especially hydrocarbon and oil resistance, NBR has a wide service temperature range (-35 oC up to 100 oC) [1-2]. High-density polyethylene (HDPE) is a semi-crystalline with exceptional chemical resistance and easy workability. Nitrile butadiene rubber (NBR) is an easily workable, resistant and flexible rubber. The knowledge of thermoplastic elastomers (TP) from NBR and HDPE blends has proven to be a valuable tool in tai...... middle of paper ......ps and thus decreases the swelling percentage [16]. It has been noted that when NBR/HDPE blend compounds are immersed in toluene, the solvent molecules must enter the NBR phase and move away more or less around the HDPE phase. The HDPE phase may be escorted to a very tortuous path for toluene molecules passing through the NBR/HDPE blend. The equilibrium swelling in toluene of the NBR/HDPE vulcanizates was determined to evaluate the extent of cross-linking. The cross-linking density values ​​are also shown in Table 4. It can be seen, as the equilibrium swelling values ​​decrease, the degree of cross-linking increases. It is also clear that the accumulation of HDPE in place of the NBR obviously decreases the equilibrium swelling values. In order to investigate the effect of HDPE on the cross-linking density of NBR/HDPE vulcanisates, considering HDPE as an additional filler.