The Advantages of Polyurethane Casters

The advantages of polyurethane casters

   1. The function can be adjusted in a large scale. A number of physical and mechanical performance indicators can be changed within a certain range through the selection of raw materials and the adjustment of formulas, so as to meet the different needs of users for product performance. For example, hardness is often an important goal of users for products. Polyurethane wheel elastomers can be made into soft printing rubber rollers with a Shore A hardness of about 20, and hard rolled steel rollers with a Shore D hardness of more than 70. , which is difficult for ordinary elastomer materials. Polyurethane elastomer is a polar polymer material composed of many flexible segments and rigid segments. With the increase of the proportion of rigid segments and the increase of the density of polar groups, the original strength and hardness of the elastomer will increase accordingly.

2. Superior wear resistance. Especially in the working conditions with the presence of water, oil and other humid media, its wear resistance is usually several to dozens of times that of ordinary rubber materials. Although metal materials such as steel are relatively strong, they are not necessarily the most wear-resistant. For example, the large-scale water pumps in the Yellow River irrigation area, the metal mouth rings and maintenance rings of the flow-passing parts are washed by a lot of sand, and it will not take long to wear them. After 100 hours, it will be severely worn and leaked, while the mouth ring and maintenance ring covered with polyurethane elastomer have not been worn out after 1800 hours of continuous operation. Others such as husker rubber rollers for rice milling, vibrating sieve plates for coal preparation, track tracks for sports fields, dynamic oil seals for cranes and forklifts, elevator wheels and roller skate wheels, etc. are also polyurethane elastomers. where it comes in handy. What needs to be mentioned here is that to improve the friction coefficient of medium and low hardness polyurethane elastomer components and improve the wear resistance under load, a small amount of aluminum disulfide, graphite or silicone oil can be added to this type of polyurethane elastomer. and other lubricants.

3. Various processing methods and wide applicability. Polyurethane elastomers can not only be molded by mastication, mixing, and vulcanization techniques like general-purpose rubber; at the same time, they can also be made into liquid rubber, pouring molding or spraying, potting, and centrifugal molding; they can also be made into pellets, which are different from general Plastics are the same, formed by injection, extrusion, calendering, blow molding and other techniques. Molded or injection molded parts, within a certain hardness range, can also be cut, ground, drilled and other mechanical processing. The diversity of processing makes the applicability of polyurethane elastomers very wide, and the scope of application continues to expand.

4. Oil resistance, ozone resistance, aging resistance, radiation resistance, low temperature resistance, good sound permeability, strong adhesion, excellent biocompatibility and blood compatibility. These advantages are why polyurethane elastomers are widely used in military, aerospace, acoustics, biology and other fields.

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