Introduction of Polyurethane Elastomer

Q: Introduction of Polyurethane Elastomer
Polyurethane Elastomer
There are majorly two types of polyurethanes: foamed and solid. Although foamed urethane materials account for a huge proportion of the world-wide polyurethanes market, polyurethane elastomer is used in many diverse applications. The various polyurethane elastomers offer a broad range of hardness and processing characteristics.
Cast polyurethane elastomers, for example, are simply made by low-pressure mixing and pouring a degassed reactive liquid polyurethane resin into a mold, and the entire process can be done by casting machine. These urethane materials have excellent abrasion resistance, and also have decent resistance to be attacked by oil, petrol and many common non-polar solvents. In general, only strong based and acids, oxidizing agents and a few strong polar solvents affect completely-cured cast polyurethane elastomers. Common finished polyurethane products made by casting polyurethane resin are printing rollers (滾輪), industrial off-road tires (橡膠內胎填充), press-on tires (堆高機輪), fork-lift tires and skate board wheels (滑板輪)…etc.
Another type of urethane materials that are commonly used as elastomer is thermoplastic polyurethane elastomers, which are supplied as pellets or granules for processing by conventional thermoplastic processing techniques such as extrusion molding, injection molding and calendering molding. These urethane materials have excellent combination of high elongation and tensile strength with high abrasion and environmental resistance, and the products can be mass-produced in precise dimensions. Depending on the formulation, thermoplastic polyurethane elastomers can also have outstanding resistance to oils, fuels, solvents and chemicals. Applications of thermoplastic polyurethane elastomers include many PU products, such as pneumatic tube, industrial hose, high-wear resistant engineering parts and footwear components…etc.

Link to TPUCO products:
Thermoplastic Polyurethane Elastomer Granules:
Casting Polyurethane Resin:

Sonnenschein, Mark. Polyurethanes Science, Technology, Markets, and Trends. John Wiley & Sons, Inc. Hoboken, New Jersey. 2015.