Technical Data

Shore Hardness Scale

Technical Data

Polyurethane is an extremely versatile elastomer used in countless applications worldwide. Polyurethane’s mechanical properties can be isolated and manipulated through creative chemistry which creates a number of unique opportunities to solve problems with performance characteristics unequaled in any other material. Our understanding of how to seize these opportunities allows Precision Urethane to provide “Flexible Solutions Through Polymeric Innovation.”

Polyurethane allows for the manufacture of very precise tailor-made parts that protect this kind of equipment. Adding urethane overlay to cone bits increases the lifespan of the cone bits. The lifespan of the steel cables is also increased because the urethane reduces steel on steel friction.  

Cast urethanes are compounded using one of two base urethane materials, ester urethane or ether urethane. Esters and ethers can be further broken down into two subcategories, TDI (toluene di-isocyanate) and MDI (methylene diphenyl di-isocyanate). TDI’s are typically cured with MOCA (MBOCA) while MDI’s are typically cured with TMP’s. Depending on what physical properties are required, other curatives can be used to offer peak performance of the final urethane component. The formulation can be manipulated to achieve the true physical properties required by the engineer for the desired part or roller. For example, other additives can be combined with the cast urethane formulations to enhance desirable characteristics such as improved or reduced coefficient of friction. A wide range of durometer can be accomplished from 20 Shore A to 70 Shore D as well as different tensile strengths, oil resistance, or compression sets depending upon the urethane formulation. 

Benefits of polyurethane include

improved abrasion resistance, cut resistance, higher bond strength, and non-marking materials among many others. 

For polyurethane molded part applications, formulations can be made that will provide several advantages versus metal machined parts. These advantages include low cost repeatability, lighter weight, and often longer wear than metal.