Monomer cast nylon, referred to as MC nylon , has superior physical and chemical properties, wide application range, large input-output ratio, and obvious technical and economic benefits. MC nylon is also one of the five engineering plastic products that China strongly advocates for development. Let's take a look at the performance and application of MC nylon:
1, MC nylon performance
MC nylon is a high molecular organic compound with a molecular weight of 3.5-70,000, which is 1 times higher than that of ordinary nylon (2-3 million). Therefore, all physical and mechanical properties are higher than that of ordinary nylon, which is highlighted in the following aspects. .
(1) Physical properties. The water absorption of MC nylon is smaller than that of ordinary nylon, which is about 0.9%, while the general nylon is about 1.9%, so the dimensional stability is good.
(2) Mechanical properties. The hardness of MC nylon is higher than that of ordinary thermoplastics, the Brinell hardness is about 21kg/cm2, the tensile strength is above 900kg/cm2, and the bending strength, compressive strength and impact resistance are higher than most thermoplastics. The rigidity of MC nylon is also outstanding. The tensile strength modulus can reach 3.6×10 4 kg/cm 2 and the flexural modulus can reach 4.2×10 4 kg/cm 2 (at room temperature). Good friction and wear performance, compared with copper and Babbitt alloy on the test machine, it has better self-lubricating performance. When dry friction, the friction coefficient is stable, the thermal performance is under 4.6kg/cm2 load, the thermal deformation temperature of MC nylon is 150°C~190°C, and the heat resistance of Masi is about 55°C, which exceeds most engineering plastics.
2. Application of MC nylon products
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, our group of engineering plastic products factory has developed more than 50 kinds of products in 3 categories, mainly including bushings, coupling elastic damping blocks and sealing rings. The leading products are chain tractor trolleys. Wear-resistant bushings on various agricultural machinery. In particular, all kinds of wearing parts and couplings on combine harvesters, MT5-C type plum blossom elastomers used in Xinjiang-2 harvesters, and long-life shock-absorbing blocks in various water pump couplings. Sealing ring products are available in various cylinder seal rings and dust jackets, large water pump seal rings, etc. In the manufacturing process, the products used in different working environments are modified, such as bushing products, through modification, increasing their self-lubricating performance and wear resistance, greatly improving the service life and saving maintenance costs for users. And maintenance time. For shock absorbing block products, focus on improving their toughness and impact resistance, maintaining high stability and long service life in harsh working environments. It is worth mentioning that the use of MC nylon products, under certain conditions of use, can simplify the structure of the machine, such as various types of tensioning wheels on agricultural machinery, can save the bearing, directly put the nylon tensioning wheel to the shaft Working up, greatly reducing manufacturing costs and maintenance costs.

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