engineering plastics uses and its properties

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Engineering plastic uses and its application
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Engineering plastics

• are a group of plastic materials that have better
  mechanical and/or thermal properties than the
  more widely used commodity plastics (such
  as polystyrene, PVC, polypropylene and polyethylen
  e).
• Being more expensive, engineering plastics are
  produced in lower quantities and tend to be used
  for smaller objects or low-volume applications
  (such as mechanical parts), rather than for bulk
  and high-volume ends (like containers and
  packaging).

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• The term usually refers to thermoplastic materials
  rather than thermosetting ones. Examples of
  engineering plastics include acrylonitrile
  butadiene styrene (ABS), used for car
  bumpers, dashboard trim and Lego bricks polycarbo
  nates, used in motorcycle helmets
  and polyamides (nylons), used for skis and ski
  boots.
• Engineering plastics have gradually replaced
  traditional engineering materials such as wood or
  metal in many applications. Besides equaling or
  surpassing them in weight/strength and other
  properties, engineering plastics are much easier
  to manufacture, especially in complicated shapes.

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Relevant properties

• Each engineering plastic usually has a unique
  combination of properties that may make it the
  material of choice for some application. For
  example, polycarbonates are highly resistant to
  impact, while polyamides are highly resistant to
  abrasion. Other properties exhibited by various
  grades of engineering plastics include heat
  resistance, mechanical strength, rigidity,
  chemical stability, self lubrication (specially
  used in manufacturing of gears skids) and fire
  safety.

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List of engineering plastics

• Acrylonitrile butadiene styrene (ABS)
• Nylon 6
• Nylon 6-6
• Polyamides (PA)
• Polybutylene terephthalate (PBT)
• Polycarbonates (PC)
• Polyetheretherketone (PEEK)

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List of engineering plastics

• Polyetherketone (PEK)
• Polyethylene terephthalate (PET)
• Polyimides
• Polyoxymethylene plastic (POM / Acetal)
• Polyphenylene sulfide (PPS)
• Polyphenylene oxide (PPO)
• Polysulphone (PSU)
• Polytetrafluoroethylene (PTFE / Teflon)

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Advantages

• The softening or melting by heating allows
  welding and thermoforming.
• The processing cycles are very short because of
  the absence of the chemical reaction of
  crosslinking.
• Processing is easier to monitor, because there is
  only a physical transformation.
• Thermoplastics dont release gases or water
  vapour if they are correctly dried before
  processing.
• The wastes are partially reusable as virgin
  matter because of the reversibility of the
  physical softening or melting.

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Disadvantages

• When the temperature rises, the modulus retention
  decreases, due to the absence of chemical links
  between macromolecules.
• For the same reason, the creep and relaxation
  behaviors are not as good as for the thermosets.
• During a fire, fusibility favors dripping and
  annihilates final residual physical cohesion.

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Engineering Plastics Suppliers In UAE

• AL HILAL ENGINEERING EQUIPMENTS EST.
• P.O.BOX 25996, MUSSAFAHABU DHABI ,
  U.A.Ewww.ahe.ae
• Sabin Plastic Industries
• P.O.Box 22185, Industrial Area 4, Al Wahda
  Street, Sharjah, UAE