Thermosoftening Plastics or Thermoplastics
The intermolecular forces between the polymer chains of thermoplastics are very weak; due to this, they can be remolded into new
shapes easily. They can be softened between the temperature 65ºC and 200ºC (149°F to 392°F) and once set, can be returned to their plastic state by reheating. The methods that are used to mould them are injection molding, extrusion, vacuum forming, compression molding, and rotational molding.
Types of Thermoplastics
Acrylonitrile Butadiene Styrene (ABS)
This is a plastic that can be molded in every method provided above. It is strong, tough, hard, and durable. It is used for making dashboard, car trims, toys, and phone parts. Electrical products are also made by this type of plastic.
Nylon is molded by injection molding and extrusion method. The main property of this plastic is that it is self lubricating and chemical resistant. It is used to make engineering products like bearings, gears, and hinges.
Acetate or cellulose
Acetate is stiffer than other types of plastic. It is transparent, light and has high resistance to heat. The method used for molding this plastic is injection molding. It is used for making tool handles, frames, and pen parts.
Polystyrene is a very light, very tough, and transparent plastic. It is waterproof and brittle in nature. It can be molded using the vacuum forming method. It is used for packaging, electrical product casing, and for making toys.
Polyethylene is the most used thermoplastic in our daily life. The main property of this plastic is its insulation towards electricity. It is flexible, soft and stiff. It is used for packaging, bags, bottles, and for some home appliances.