Plastic films and rolls are thin polymers that have a low-friction surface that prevents sticking and binding. They are good electrical insulators and are commonly used to make parts that slide and roll like bushings, bearings, conveyor rollers, and gasket and seals. UHMW polyethylene films and rolls are wear- and impact-resistant and have a low-friction surface that prevents sticking and binding. Polyester films and rolls are strong, safe, nontoxic, and recyclable. They are easy to machine and are often used in food processing applications. LDPE films and rolls are soft, flexible, and chemical-resistant. They absorb shock without breaking. Polytetrafluoroethylene (PTFE) films and rolls withstand chemicals and solvents better than most plastics and have a naturally slippery surface that minimizes friction.