Modified Polyamide 6T

Applications detail

Heat resistant, chemical resistant, modified polyamide "nylon" for electronic and automotive applications.


ARLEN™ is a heat resistant, modified polyamide 6T developed by Mitsui Chemicals, Inc. With a high melting point (320°C) and a rigidity level comparable to super engineering plastics, it possesses strong dimensional stability and chemical resistance. In addition, the effect of water absorption, which is a traditional weakness of polyamides, has been reduced to a minimum.

There are three individual offerings in the modified polyamide product series; each polyamide designed to meet a specific application requirement as presented below:

A/G SeriesMechanical and structural parts
AE SeriesFor tribological applications
C SeriesElectrical and electronic parts
ARLEN™ Modified Polyamide 6T

Please click on the charts below to access a graphical depiction of the grades and physical properties for the ARLEN modified polyamide as it pertains to electrical and electronic and mechanical and structural and tribological applications respectively:

Electrical and Electronic: For a graphical presentation of ARLEN's electrical and electronic characteristics, please click on the chart below:

Mechanical and Structural:

  • High temperature rigidity - Due to its high glass transition point (125°C), ARLEN can retain high rigidity even in a high-temperature atmosphere, such as the inside of an engine room.
  • Heat Resistant
  • Dimensional Stability
  • Chemical Resistance - demonstrating the best chemical resistance of all polyamide resins.
Mechanical and Structural
  • Little dimensional change due to water absorption - The dimensional change of ARLEN due to water absorption is less than 1/2 of PA66, which is the lowest of all polyamide resins.

In electrical and electronic parts, this modified polyamide can be used in:

  • Connectors
  • Jacks
  • Switches
  • Power supply terminals
  • Various cases

Automotive Applications - Engineering Plastic for Under the Hood Applications

The heat resistant modified polyamide 6T A/G and AE series are designed to meet specific mechanical, structural and tribological application requirements of under the hood parts including:

  • Cooling system parts
  • Cylinder head covers
  • Thermostat cases
  • Hydraulic system pistons
  • Oil pump housings

Other mechanical and structural applications include light-load tribological application parts of office automation equipment.

Mitsui Chemicals recommends the following to mold this sophisticated engineering plastic for any application part:

Molding machine:

  • The injection molding of this modified polyamide requires a molding machine having wear resistance (corrosion resistance for the flame-retardant grade).
  • A small molding machine should be selected so that the volume of one shot will be not less than 10% of the maximum injection capacity.
  • A standard nozzle should be used.


  • A steel material having wear resistance (corrosion resistance for the flame-retardant grade) is required for the construction material of a mold for ARLEN.
  • An approximately 10-µ m vent is required.


  • Any ARLEN resin that absorbs moisture after the bag is opened needs to be dried again.
  • Dehumidifying dryer: 110°C x 2 to 6 hr.

Electronic and Electric Standard Molding Conditions

Electronic and Electric Standard Molding Conditions

Mechanical and Structural Standard Molding Conditions

Mechanical and Structural Standard Molding Conditions

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