Engineering plastic

Engineering plastic

Engineering plastics are a group of plastic materials that exhibit superior mechanical and thermal properties in a wide range of conditions over and above more commonly used commodity plastics. The term usually refers to thermoplastic materials rather than thermosetting ones.

Examples of engineering plastics include:

* Acrylonitrile butadiene styrene (ABS)
* Polycarbonates (PC)
* Polyamides (PA)
* Polybutylene terephthalate (PBT)
* Polyethylene terephthalate (PET)
* Polyphenylene oxide (PPO)
* Polysulphone (PSU)
* Polyetherketone (PEK)
* Polyetheretherketone (PEEK)
* Polyimides

Commodity plastics

The more commonly used thermoplastic materials are known as commodity plastics as they are traded and used in great quantities. Examples are polystyrene (PS), polyvinyl chloride (PVC), polypropylene (PP) and polyethylene (PE).

Typical applications for commodity plastics are high production volume products such as ‘polythene’ bags (made from polyethylene), vacuum-formed food packaging (low density polyethylene), disposable drinking cups (high-impact polystyrene) and window frames/wire insulation (PVC).

Engineering plastics

Engineering thermoplastics are sold in much lower quantities and are thus more expensive per unit weight. Despite this, they are widely used in everyday products. For example ABS is used to manufacture car bumpers, dashboard trim and Lego bricks, polycarbonate is used in motorcycle helmets and polyamides (nylons) are used for skis and ski boots.

Typically, an engineering plastic is chosen for its range of enhanced physical properties e.g. polycarbonate is highly impact resistant and polyamides are highly resistant to abrasion. In these types of applications, designers are looking for plastics that can replace traditional engineering materials such as wood or metal. The advantage gained is the inherent ‘formability’ (ease of manufacture) of plastics as opposed to metal-working or fabrication.

Other properties exhibited by various grades of engineering plastics include high heat resistance, mechanical strength, rigidity, chemical stability and flame retardency.

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Plastic — is the general common term for a wide range of synthetic or semisynthetic organic solid materials suitable for the manufacture of industrial products. Plastics are typically polymers of high molecular weight, and may contain other substances to… …   Wikipedia

  • Plastic recycling — is the process of recovering scrap or waste plastics and reprocessing the material into useful products, sometimes completely different from their original state. For instance, this could mean melting down soft drink bottles then making model… …   Wikipedia

  • plastic — plastically, plasticly, adv. /plas tik/, n. 1. Often, plastics. any of a group of synthetic or natural organic materials that may be shaped when soft and then hardened, including many types of resins, resinoids, polymers, cellulose derivatives,… …   Universalium

  • Plastic hinge — A plastic hinge is a type of energy damping device allowing plastic rotation [deformation] of an otherwise rigid column connection [ [ Bergad.pdf Analysis of Rotational Column with… …   Wikipedia

  • Plastic explosive — Plastique redirects here. For other uses, see Plastique (disambiguation). C 4 plastic explosive (the off white rectangular blocks) being used to destroy unexploded artillery components. Plastic explosive is a specialised form of explosive… …   Wikipedia

  • Plastic Little — Infobox animanga/Header name = Plastic Little caption = The cover of the Plastic Little DVD. ja name = プラスチックリトル ja name trans = genre = Adventure, Comedy, Science fiction, YuriInfobox animanga/OVA title = Plastic Little: The Adventures of… …   Wikipedia

  • Engineering Education Scheme — The Engineering Education Scheme is a scheme run in the United Kingdom by the Engineering Development Trust to promote the education of school students about engineering. It is part of the Royal Academy of Engineering s BEST programme.The… …   Wikipedia

  • Plastics engineering — encompasses the processing, design, development, and manufacture of plastics products. A plastic is a polymeric material that is in a semi liquid state, having the property of plasticity and exhibiting flow. The nature of plastic materials poses… …   Wikipedia

  • Polyoxymethylene plastic — Polyoxymethylene (POM), in the USA also commonly known under DuPont s brand name Delrin, is an engineering plastic, a polymer with the chemical formula ( O CH2 )n . It is often marketed and used as a metal substitute. Delrin is a lightweight, low …   Wikipedia

  • Lalbhai Dalpatram College of Engineering — Infobox University name = L.D. College of Engineering (Falls under Gujarat Technological University) established = 1948 type = Urban State run Engineering College city = Ahmedabad state = Gujarat country = India placement =… …   Wikipedia