Polyurethane Polymers – Properties and Advantages
Polyurethane is a highly flexible elastomer utilized in various applications all over the world. Its mechanical properties may be isolated and controlled through innovative chemistry, creating a large number of unique opportunities to fix issues with performance characteristics to degrees by far unparalleled by any other material. By understanding these opportunities, several industries are able to develop excellent solutions to a variety of consumer needs.
Properties and Benefits
Broad Hardness Range
Categorizing polyurethane according to hardness, which starts at 20 SHORE A all the way to 85 SHORE D, is dependent on the molecular structure of the prepolymer.
Large Load Capacity
The load capacity of polyurethane is outstandingly high, whether it is extended or compressed. Polyurethane that has been created for a specific application will simply change its shape in accordance with the heavy load it is subjected to, and then go back to its initial shape as soon as the load has been lifted.
When used in high flex fatigue applications, polyurethanes are a standout. As flex properties of these polymers can be separated in a laboratory, their capacity to lengthen and then recover is quite noteworthy.
Resists Abrasion and Impact
When serious deterioration proves very difficult in certain applications, polyurethanes are still perceived to be the best solution, regardless of low temperatures.
Polyurethanes boasts high tear resistance as well as high tensile properties.
Resistance to Water, Oil and Grease Resistance
The material attributes of polyurethane have shown unusual stability (little to no swelling) with direct water, oil and grease exposure, and can perform well for many long years in subsea environments.
Polyurethanes have good electrical insulation abilities.
Broad Resiliency Range
Resilience is one of the general functions of hardness. In elastomer applications that involve shock absorption, low rebound compounds are often used i. A 40% to 65% resilience range is needed for an application where fast recovery is a must and high-frequency vibrations are involved. Generally speaking, toughness is improved by high resilience.
During the manufacturing process, polyurethane effortlessly attaches to an entire array of materials, including metals, plastics and even wood. Thus, it is a perfect choice for the production of metals, rollers and inserts.
Harsh Environment Performance
Polyurethane is highly resistant to temperature extremes, which means harsh environmental conditions and a long list of chemicals are not going to cause material degradation.
Mold, Mildew & Fungus-Proof
Fungi, mold and mildew cannot feed off of polyether-based polyurethanes and will thus not grow there, making these polyurethanes highly suitable for FDA applications and for applications in tropical countries. Special additives may be added to avoid such growths in polyester materials too.
Polyurethane is a material that is often used to make special parts and prototypes, as well as for large and iterative productions.