polyurethane

Polyurethane
Polyurethane is a resilient, flexible and durable manufactured material that can take the place of paint, cotton, rubber, metal or wood in thousands of applications across virtually all fields. It can be hard like fiberglass, squishy like upholstery foam, protective like varnish, bouncy like rubber or sticky like glue. Since its invention during the 1940s, polyurethane has been used in a wide range of items, from baby toys to airplane wings, and it continues to be adapted for contemporary technology.

This substance is categorized as a polymer — a molecule that consists of a series of repeating smaller units called monomers — based on its chemical structure. It is manufactured by combining two types of compounds, a diisocyanate and a diol, which are monomers, through a chemical reaction. This makes a basic material whose variations can be stretched, smashed or scratched and will remain fairly indestructible. Depending on the different diisocyanates and diol or polyol constituents, the resulting polyurethane might be in the form of a liquid, foam or solid. Each form has its own advantages and limitations.

Some polyurethane is categorized as an elastomer. It has elastic properties while maintaining some rigidity, which is beneficial for items such as the wheels of a dolly, which must absorb shock without compressing too much. Polyurethane can be extremely flexible when used as a foam insulator in construction or a foam cushion in upholstery. It can be deformed over and over and still maintain its original shape. In other words, it has what is called structural memory.

Face Modeling