LEMALLOY is a brand name of our modified polyphenylene ether resin (m-PPE resin) polymer-alloy type products (island-sea structure), consisting of polyphenylene ether (PPE) as the island and crystalline resins such like polyamides (PA) and polypropylene (PP) as the sea. LEMALLOY therefore provides well-balanced properties of crystalline resin (chemical resistance and moldability) and PPE resin (dimension stability and high-temperature rigidity), enabling use under various environments.

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General chemical structure of polyphenylene ether (PPE)

  • Heat resistance enduring 160 degree C coating without reinforcement
  • Excellent impact strength
  • Chemical resistance equivalent to polyamide, polyester and polypropylene resins
  • Excellent impact strength
  • Excellent flowability in molding
  • Various flame retardant grades available
  • Various reinforced grades and lower specific gravity grades (containing void), etc.



LEMALLOY (modified polyphenylene ether resin; m-PPE resin) combines chemical-resistance and modability of crystalline resin with dimensional stability and high-temperature rigidity of amorphous resin.
As a result, the compound can be used to create stable products for a wide variety of applications used in various environments.
It is compatible with a wide range of applications, including automotive components, components for electrical equipment and electronics, machine parts, construction, and household devices.
For detailed information about automotive components in which LEMALLOY is used, see here.

Lineup / Specifications


LEMALLOY presents various m-PPE based polymer alloy grades. Please see below for detail.

Basic Properties

Inquiries Concerning Products

Mitsubishi Engineering-Plastics Corp.

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