Compared with ordinary nylon, MC nylon has much higher physical and mechanical properties than ordinary nylon.
(1) Physical properties. MC nylon has a lower water absorption than general nylon, about 0.9%, while general nylon is about 1.9%, so it has good dimensional stability.
(2) Mechanical properties. The hardness of MC nylon is higher than that of general thermoplastics. The Brinell hardness is about 21kg/cm2, the tensile strength is more than 900kg/cm2, and the bending strength, compression strength and impact resistance are higher than most thermoplastics. The rigidity of MC nylon is also very outstanding, the tensile strength modulus can reach 3.6×104kg/cm2, and the bending elastic modulus can reach 4.2×104kg/cm2 (at room temperature). It has good friction and wear performance, and has better self-lubricating performance compared with copper and Baotou alloy on the testing machine. During dry friction, the coefficient of friction is stable, the thermal performance is under a load of 4.6kg/cm2, the thermal deformation temperature of MC nylon is 150℃~190℃, and the heat resistance of Maxi is about 55℃, which exceeds that of most engineering plastics.
It can be seen from the various physical properties of MC nylon that as a special engineering plastic, MC nylon can be used in many harsh working environments, especially mining machinery and agricultural machinery. In the application of agricultural machinery, the engineering plastic products factory has developed more than 50 products in 3 categories, mainly including shaft sleeves, coupling elastic damping blocks and sealing rings. The leading products include chain tractor trolleys and various Wear-resistant bushings on agricultural machinery. Especially all kinds of wearing parts and couplings on combine harvesters, long-life shock absorbers in all kinds of water pump couplings, etc. Sealing ring products include various oil cylinder sealing rings and dust sleeves, large water pump sealing rings and so on. In the manufacturing process, the products used in different working environments are modified, such as shaft sleeve products. Through modification, their self-lubricating performance and wear resistance are increased, which greatly improves the service life and saves maintenance costs for users. And maintenance time.
For shock-absorbing block products, it focuses on improving its toughness and impact resistance, which can maintain high stability and long service life in harsh working environments. It is worth mentioning that the use of MC nylon products can simplify the structure of the machine parts under certain conditions of use. For example, all kinds of tension wheels on agricultural machinery can save the bearing and directly set the nylon tension wheel to the shaft. Running on, greatly reducing manufacturing costs and maintenance costs.
