Modified Polyamide 6T

Usage detail

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


Heat resistance Durability Chemical resistance Fluidity Heat and Chemical Resistant High Temperature Rigidity Dimensional Stability

  • Introduction
  • Applications
  • Processing Methods

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 Series Mechanical and structural parts
AE Series For tribological applications
C Series Electrical and electronic parts

ARLEN™ Modified Polyamide 6T Physical Properties

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:

ARLEN™ Modified Polyamide 6T Physical Characteristics

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.
  • 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

Mechanical and Structural Standard Molding Conditions

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