Types of Engineering plastics


Types of Engineering plastics

In last blog I discussed about the types of plastics the main type in its engineering plastics, why because it’s only mostly used in wide range in present life. Thermoplastics only play an important role the engineering plastics are derived as engineering thermoplastics.

            Engineering Thermoplastics are a subset of plastic materials that are used in applications generally requiring higher performance in the areas of heat resistance, chemical resistance, impact, fire retardancy or mechanical strength. Many kinds of thermoplastic are used for engineering purpose here I’m going the discuss about most important type of thermoplastics which is used in wide range they are.

Acrylonitrile-Butadiene-Styrene (ABS):
ABS ( Acrylonitrile-Butadiene-Styrene) is an opaque thermoplastic polymer material made from the monomers Acrylonitrile, 1, 3-Butadiene and Styrene. Strong and durable even at low temperatures, it offers good resistance to heat and chemicals and is easy to process.

Properties:
Rigid, opaque, glossy tough, good low temperature properties, good dimensional stability and easily electroplated, low creep.

Applications:
Telephone handsets, rigid luggage, domestic appliance housings (food mixers), electroplated parts, radiator grills, handles, computer housings.

Liquid Crystal Polymers (LCP):
LCPs (Liquid Crystal Polymers) are partially crystalline aromatic polyesters based on p-hydroxybenzoic acid and related monomers. LCPs form areas of highly ordered structures when in the liquid phase but the degree of order is less than that of a regular solid crystal. LCPs are fire resistant at high temperatures and chemically resistant in very thin walled applications. LCPs are typically used for medical applications, including trays and drug delivery systems, and in diagnostics for the automotive and telecommunication industries.



Polybutylene Terephthalate (PBT):
PBT (Polybutylene Terephthalate) is a thermoplastic crystalline polymer which is mechanically strong, solvent resistant and has low shrinkage properties during formation.It can be treated with flame retardants to make it noncombustible.

Polyaryletheretherketone (PEEK):
PEEK (Polyaryletheretherketone) materials are semi-crystalline, high purity polymers comprising of repeating monomers of two ether groups and a ketone group.PEEK is characterised by excellent mechanical properties maintained to high temperatures.

Polyoxymethylene (POM):
POM (Polyoxymethylene), also known as acetal, polyacetal and polyformaldehyde, is an engineering thermoplastic used in precision parts which require high stiffness, low friction and excellent dimensional stability. As a tough, solvent and fuel resistant plastic it is used for gears, bearings, window guides, speaker grills, zips, lighters, aerosol valves, fasteners and furniture components.



Polystyrene (PS):
                Polystyrenepolymer which softens when heated and can be converted into semi-finished products like films and sheets, as well as a wide range of finished articles.

Polyvinyl chloride (PVC):
Is one of the earliest plastics, and is also one of the most extensively used. It is derived from salt (57%) and oil or gas (43%).

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