Plastic is a common material and used in various sectors. Home, construction, industrial, automotive, toys, and other areas take advantage of the plastic carrying out certain manufacturing processes and tools and articles. Its properties make it a very useful material. Is malleable and very low density. It is waterproof and electrical insulation, thermal and acoustic insulation. Also resists corrosion and has low cost.
Depending on its composition, reaction to heat, synthesis, etc., a type of plastic apart from others. For example, according to types of plastic composition are as follows: polystyrene, expanded polypropylene, polyvinylchloride ...
According to the reaction of the plastic front of a source of heat or high temperatures are distinguished between thermoplastics and thermosets.
Thermoplastics can be deformed if it is at an average temperature or room temperature. Exposed to higher temperatures, passed to a liquid state. Exposed to cold enough temperatures, harden again. Major thermoplastic resin are cellulosic (rayon), polyethylenes (methacrylate, PVC or polystyrene), and nylon and perlon, and rubber derivatives.
The thermosetting plastics are those that have been heated, fused and solidified. Once gone through this process, and can not be remelted. They are thermosetting baquilita, epoxy resins, polymers made from phenol, polyesters and amino resins.
Regardless of the type of plastic it is, there are several ways of working with this material. Some of these methods are injection molding, blow molding, extrusion and rotational molding.