Polypropylene Compound


Marketing Areas

  • ALL

Contributes to weight reduction and cost reduction by replacing engineering plastics

Thermylene™ is a high strength, high stiffness, high performance chemically bonded polypropylene compound.


  • Others


  • Interior
  • Exterior
  • Under the hood
  • Batteries
  • Others

Polypropylene Compound


Product Q&A


QWhere is the product manufactured?

A North America and China are the main manufacturing bases. For other locations, please contact us.

QIs it possible to supply the product in Japan?

A In Japan, Asahi Kasei Advanced Corporation stocks and sells the product. For details, please contact us.

QDo you have products other than glass fiber compounds?

A Talc, mineral compounds, TPO, etc. are also available.
Please contact us for details.

QDo you have a list of physical properties?

A For more information, please visit

QAre there any recommended molding conditions?

A Please contact us for details.

QWhat kind of parts are used in this product?

A Our products are used in structural components such as door handle brackets and door modules, as well as in engine compartment components such as fan shrouds.

QCan this product replace metal?

A Sunroof frames, for example, have been replaced. Please contact us for details.

It enables substitution from metals and engineering plastics, contributing to weight reduction and cost reduction.

It enables substitution from metals and engineering plastics, contributing to weight reduction and cost reduction.



Generally, most of the products are compounded with 5% or 10% glass fiber, but Thermylene can be adjusted in 1% increments, allowing you to select the grade that best suits your needs. In addition, even within the same grade with the same glass fiber content, Thermylene offers a variety of formulations for impact improvement, heat resistance, weather resistance, scratch resistance, low VOC, etc.



Low specific gravity and light weight

Since polypropylene is the resin with the lowest specific gravity, it can achieve weight reduction compared to metals and engineering plastics. If a grade containing 35% glass fiber is used to maintain the same level of strength and rigidity as PA6-GF30% in a part of the same shape, a weight reduction of about 10% can be expected.


High Modulus/Stiffness

It can contain up to 60% glass fiber. So it enables the selection of materials with strength and rigidity suitable for various applications such as mechanical parts of automobiles. Heat-resistant grades are also available to maintain physical properties even in high-temperature environments, making them suitable for internal engine compartment parts.


Usage example01

Mirror BRKT

Properties including high modulus and stiffness make it a viable alternative to metals and engineering plastics. The stiffness of the material helps to support the mirror assembly, thus reducing mirror distortion.


Usage example02

Front End module


Even when the glass fiber content is increased to maintain strength and rigidity, the material has high flowability and thin wall characteristics, making it excellent for molding large products. The ability to maintain strength and rigidity even in high temperature environments makes it suitable for creep structure.

Usage example03

Interior parts

SoFormTM, a PPGF haptic material, has improved scratch resistance properties with less color change when compared to TPO with 20% talc, enabling the molding of automobile interior parts with good appearance and less visible scratches. In addition, it has a soft feel that is not typical of glass-filled materials, eliminating the need for additional processing and reducing the number of processes.

Thermylene™ SoForm

Product Q&A


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