There are two main types of plastics.
1. Thermoset or thermosetting plastics. These are rigid plastics and retain their shape after cooling. They are hard and durable. Thermosets are used for car parts, aircraft parts and tyres. Examples include polyurethanes, polyesters, epoxy resins and phenolic resins.
2. Thermoplastics are less rigid or are flexible.
d. (Teflon): The polymer is stable, heat-resistant, strong, resistant to many chemicals and has a nearly frictionless surface. Teflon is used in plumbing tape, cookware, tubing, waterproof coatings, films and bearings.
e. Polyvinylidine Chloride (Saran): This plastic can be drawn into films and wraps that are impermeable to food odors. Saran wrap is a popular plastic for packaging foods.