Thermoplastics, including polystyrene, PVC, EVA, polyurethane, LPCs, and polycarbonate, can be melted and reshaped multiple times. They are used to make a variety of products, from foam plates to bulletproof glass.
Thermoplastics are those that take the hardened form of plastic when they cool but are converted to liquids when heated. This heating and melting process can usually be completed many times. Each time, a new shape or form is possible. Materials that fall into this category include polystyrene, polyvinyl chloride, and ethylene-vinyl acetate.
Polystyrene is a material produced from an oily liquid that tends to have a distinct odor. When in its hardened form, polystyrene is usually colorless. A good example of the substance in this state is a CD case. Color is often added to make other items such as plastic cups, DVD cases, and razors. Polystyrene is also used to make foam products such as plates, egg cartons and packaging insulation.
Polyvinyl chloride (PVC) is one of the most common thermoplastics. Chlorine is an important component in its production. It is usually produced in sheets which are subsequently formed into a wide variety of products. Additives known as plasticizers are used to make PVC more pliable and pliable. It is used to make tubes, pipes and inflatable toys.
Ethylene vinyl acetate (EVA) is a material composed of ethylene, a mass-produced chemical compound, and vinyl acetate, a colorless liquid. When these two substances are combined, a flexible material is made which can be easily formed into a series of products. EVA is used in plastic wraps to make medical gloves and electrical wire covers.
Polyurethanes are thermoplastic materials whose characteristics can vary considerably. It can be very elastic and it can also be very hard. Rubber products are often replaced by polyurethane ones because this material is more resistant to oils, fats and tearing. This material can also be used to make foam, which is often used in the interior of seats. Other polyurethane items include gaskets, belts and surfboards.
Liquid crystal polymers (LPCs) are considered a special class of polyesters. These materials have a strong ability to resist chemical and thermal damage. In liquid form, these thermoplastics can produce the liquid crystal displays (LCDs) found in watches and other electronic devices. In the hardened form, LPCs are used for the production of printer parts, electrical parts and kitchen items.
Polycarbonate is a generally light but resistant material. It is considered more environmentally friendly than many other thermoplastics. Polycarbonate also tends to have outstanding optical properties, making it popular in the manufacture of prescription eyewear. This material is also used to make bulletproof glass, DVDs and bottles.
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