In the modern industrial world, polyurethane rollers are key players. They help many processes run smoothly and efficiently, proving to be both robust and adaptable in a range of applications. In this blog, we will explore the unique features and benefits of polyurethane rollers, as well as their wide use in different sectors. Join us as we delve into the important role these rollers play in the industry.
What is a Polyurethane Roller?
Polyurethane rollers, made from polyurethane elastomer, bridge the gap between rubber and plastic. This elastomer is produced using isocyanates, including PPDI, MDI, TDI, and NDI. While these ensure robust thermal performance, NDI-based products might show a taupe color due to yellowing on light exposure.
Polyurethane, an engineering marvel, boasts of attributes suitable for roller applications. Key properties include:
- Flexibility: It is the ability of polyurethane to withstand tensile forces that tear the material apart and tear its bulk. Polyester-type polyurethane has the highest tear strength. Polyurethane has a tear strength of up to 1000 pounds per linear inch according to ASTM D-624 Type C testing.
- Wear resistance: Polyurethanes are highly resistant to sliding and impact. Due to its low friction coefficient and high strength, it is not affected by sliding wear. Through impact wear, it absorbs the energy of particle attack, disperses stress, and recovers instantly without any sign of damage. Polyurethane is blended to have properties such as a low coefficient of friction, high tear strength and elasticity, which help it withstand wear and tear. Its resin composition gives it excellent wear resistance. Among the polyol compounds used to make polyurethane, polyester has the best tear and abrasion resistance.
- Chemical Stability: The chemical resistance of polyurethane depends on the type of polyol used in its polymer system. Ether-based systems are more resistant to water, making them suitable for wet applications. Ester groups, on the other hand, are most resistant to oils, solvents, and most petroleum compounds.