The words contained in this file might help you see if this file matches what you are looking for:

...Lecture plastic part manufacture injection molding in the last years plastics have become most dominant engineering material for products we take a brief look at common types of and how they are processed all polymers these further divided into two basic thermoplastics thermosets melt when heated so can be melted re formed again harden if will break down chemically lose their properties some very similar to rubber used as synthetic categorized elastomers here typical uses general more durable harder tough light automobile parts construction materials examples unsaturated polyesters lacquers varnishes boat hulls furniture epoxies resins glues coating electrical circuits composite like fiberglass helicopter blades boats etc medical masks gloves substitutes polyurethanes mattress cushion insulation toys silicones surgical oxygen other applications joint seals low melting point softer flexible bottles food wrappers polyethylene packaging milk water film polypropylene carpet fibers automoti...