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Property Comparison

Comparing Apples with Apples

In this section, we group the more common Engineering Plastics together, in order to compare them for similar applications.

HDPE PE300, PE500, PE1000

  • Low friction coefficient (same as acetal)
  • Good resistance to low temperatures
  • Maximum temperature use 80C
  • High impact strength
  • Good chemical resistance and impervious to water
  • FDA approved for use with foodstuffs
  • Pulleys, pumps, chopping boards, sprockets


  • Very low friction coefficient (lower than HDPE)
  • High abrasion resistance at low loads
  • Excellent resistance to low temperatures
  • Maximum temperature use 80C
  • Virtually unbreakable
  • Good chemical resistance and impervious to water
  • FDA approved for use with foodstuffs
  • Hopper and chute liners, fenders, guide rails


  • Excellent resistance to fatigue from flexing (almost unbreakable)
  • Maximum temperature resistance 100C
  • Good electrical properties
  • Good chemical resistance
  • Impervious to water.
  • Applications include: cladding, pulleys, pumps


  • Flame retardant
  • Good impact strength but low resistance to crack propagation
  • Maximum temperature use 60C
  • High electrical insulation
  • Vacuum formable

Acrylic (PMMA)

  • Excellent optical clarity, DIN 5036 Part 3 >92%
  • Outstanding UV resistance
  • Good impact performance compared to float glass
  • Ease of fabrication, cutting, drilling, polishing, thermoforming, engraving
  • Excellent acoustic dampening properties
  • Good resistance to a range corrosive substances


  • Good dimensional stability
  • Good temperature resistance (-30°c +120°c)
  • Very tough (high impact resistance)
  • Good electrical insulating properties
  • Can be used with foodstuffs
  • Self extinguishing
  • Electrical insulating, medical and pharmaceutical components, items for sterilising

Polyester (PETG)

  • Fire rating BS476 Part 7 Class 2. Flammability rating UL94/HB
  • Good Optical clarity
  • Excellent forming capability, no pre-drying required when vacforming
  • Very good impact strength
  • FDA approved for contact use with foodstuffs (21 CFR 177.1315) USA
  • Very good electrical properties
  • Good chemical resistance

Acetal Copolymer

  • Low moisture absorption
  • Excellent dimensional stability
  • High mechanical strength
  • Lower friction coefficient than Nylon
  • Resists hydrolysis better than acetal homopolymer
  • Resists strong alkalis better than acetal homopolymer
  • Same operating temp as acetal homopolymer
  • Food approved in natural grade
  • Applications include: bushes, bearings, rollers, pulleys, electrical insulation, wear strips


  • Low moisture absorption
  • Higher tensile strength & operating temperatures than acetal, but lower notched impact resistance
  • Very good creep resistance/dimensional stability
  • FDA approved for contact with foodstuffs
  • Stable and easy to machine though nylon has greater toughness
  • Applications include: Parts for food and medical equipment, precision components

Nylon 6, Nylon 66, Nylon GX, Nylon GF (Extruded)

  • Nylon 6 (Extruded) - has better impact strength and mechanical dampening than 66 & GX
  • Nylon 66 (Extruded) - PA66 has higher tensile strength, stiffness, creep resistance, better wear and temperature resistance than PA6
  • Nylon GX (Extruded) - PAGX has better friction coefficient UV resistance and wear resistance than PA66
  • Nylon 6, 66, GX, GF (Extruded) - PAGF (20% Glass) has lower water absorption, better hardness, stiffness and dimensional stability and higher temp resistance than the other nylons in this group but poorer friction coefficient
  • Applications include: Gears, bearings, pulleys, wheels

Cast Nylon

  • PA6G (Nat) properties are better than PA6 extruded and similar to PA66
  • PA6G-HR (Black) is UV resistant and tougher than PA6G and PA6-OIL. Its friction coefficient is better than 6G but not as good as 6G-Oil Filled
  • PA6G-Oil Filled has the lowest friction coefficient of all our nylons and very low moisture absorption. Excellent as a bearing material and for gears, rollers, wheels, bushes

Nylon 11

  • Very low moisture absorption means that it is more stable than PA6/66/GX
  • Lower mechanical strength, stiffness and wear than PA6/66/GX but better impact strength
  • Approved for use with foodstuffs
  • Excellent electrical insulation properties


  • High operating temperature (+250°c continuous)
  • High mechanical strength and hardness
  • Excellent wear resistance
  • Good creep resistance, even at high temperature
  • Very good resistance to hydrolysis
  • Excellent chemical resistance
  • Good electrical insulating properties
  • Low flammability
  • Exceptional resistance to high energy radiation
  • Glass additives improve stiffness and strength and gives improved creep properties at high temperature
  • Used in the chemical, nuclear, electrical, medical and aerospace industries

Polyethersulphone (PES)

  • High temperature resistance (+180°c continuous)
  • Good mechanical performance at high temps
  • Good creep resistance over a wide temp range
  • Excellent hydrolysis resistance
  • Physiologically inert (suitable for food contact)
  • Good electrical insulating and dielectric properties
  • Very good high energy radiation resistance
  • Applications include: Insulating bushings, pumps, valves, het exchangers, microwaves, medical equipment, items for sterilising


  • Excellent chemical and hydrolysis resistance
  • Better mechanical properties than PTFE (greater load and creep resistance)
  • Excellent weather and UV resistance
  • Very good electrical insulation properties
  • Approved for use with foodstuffs
  • Very good resistance to high energy radiation
  • Valves, pumps, water tanks, linings


  • Excellent resistance to most chemicals and solvents
  • Lowest coefficient of friction of any solid plastic
  • Excellent temperature range (-200°c to +250°c)
  • Non flammable
  • Excellent dielectric properties
  • Virgin PTFE is FDA approved for use with foodstuffs
  • Poor dimensional stability
  • Additives such as glass, carbon, bronze etc. will offer improved wear, hardness, lower creep, improved thermal conductivity