FAQ

Torlon® PAI is a high-performance thermoplastic known for its ability to maintain strength, stiffness and dimensional stability at temperatures up to 260°C. PAI is the acronym for polyamide-imide, a polymer that offers the highest strength and stiffness of any commercial thermoplastic at extremely high temperature and stress. Parts made of Torlon® PAI perform under conditions generally considered too severe for other thermoplastics. 

For this reason, critical mechanical and structural components for jet engines, automotive transmissions, oil recovery, off-road vehicles and heavy-duty equipment are manufactured from Torlon® PAI.

Torlon® PAI offers the highest strength and stiffness of any thermoplastic up to 260°C (500°F). It has outstanding resistance to wear, creep, and chemicals – including strong acids and most organics – and is ideally suited for severe service environments. Other advantages include superior toughness at cryogenic temperatures, low coefficient of thermal expansion and outstanding resistance to aviation and automotive fluids. 
 
For detailed data, see the Torlon® PAI Design Guide.

Unlike other commercial thermoplastics, Torlon® PAI retains usable mechanical properties up to 260°C (500°F). In comparison to polyimide, Torlon® PAI is a more economical option for high volume production because it is melt processible and can be injection molded. Polyimide materials are thermosetting and must be machined from stock shapes or sintered.

Torlon® PAI can be processed with high precision and repeatability using mostly conventional injection molding equipment. This allows for the production of complex geometries with tight tolerances, and reduces or eliminates the need for secondary machining. Engineers can leverage injection molding to consolidate parts, lower assembly costs, minimize potential failure points, and simplify supply chains. Ultimately, this means that Torlon® PAI can drive significant cost savings over polyimide, while maintaining the ultra-high performance required for demanding applications. 

• High-strength, unfilled grades
• High-strength, glass fiber and carbon fiber reinforced grades
• Wear-resistant grades for high PVs (pressure x velocity) in dry and lubricated environments
• Specialty grades for undercut tooling, such as deep groove bearings

Torlon® PAI is also available in extrusion and compression molding grades, which are used to produce stock shapes. Stock shapes are an excellent option for prototyping as well as for machining parts in both low- and high-volume production, especially when avoiding tooling is advantageous.

A related line of Torlon® amide-imide (AI) powders, also available from Syensqo Specialty Polymers, are used to manufacture high-temperature adhesives, non-stick coating primers, composite matrices, coatings and films.

More information: Torlon® PAI Design Guide.

Technical Datasheets for Torlon® PAI products are available directly on each product grade page within our Product Finder. Simply select a specific grade to view and download its Technical Datasheet.

Material Safety Datasheets can be obtained by contacting a Syensqo Specialty Polymers Representative, or by entering a request through our web portal. 

Torlon® PAI combines the mechanical and ultra-high temperature benefits of a polyimide with the significant advantage of being melt-processable like any standard polyamide. Torlon® PAI can be molded in on any standard injection molding machine. The only modification that you need to make is to use a low compression ratio or straight conveying screw with no check ring.  In addition, a curing step is required to maximize both mechanical and chemical resistance properties. This curing step is best managed with programmable ovens with overtemperature shutoff controls.

Qualified Torlon® PAI processors are present in all regions of the world, and they demonstrate outstanding processing capabilities with world class yields and excellent quality. In order to maintain and ensure that the highest quality standards are met, we require that all Torlon® PAI molders become an “Approved Molder” via a Syensqo qualification process.

If you need to locate an approved Torlon® PAI molder or if you are interested in becoming an approved molder, please contact your Syensqo Specialty Polymers Customer Technical Development representative.

More information: Torlon PAI Design Guide.

Torlon® PAI base resins and compounds are produced in Syensqo’s U.S. plant in Greenville, South Carolina, using state-of-the-art manufacturing technology. The high quality and reliability of Torlon® PAI products are well-established in numerous markets. 

More information: Torlon Product Page.

Mitsubishi Chemical Group Corporation (MCAM), Drake Plastics, and Ensinger are Syensqo’s official distributors of various sizes of plaques, rods, and tubes made from Torlon® PAI. MCAM markets Torlon® PAI stock shapes under the Duratron® trade name.

Please contact your Syensqo Customer Technical Development representative to find the best partner to address your needs.

Torlon® PAI is virtually unaffected by aliphatic and aromatic hydrocarbons, chlorinated and fluorinated hydrocarbons, and most acids at moderate temperatures. However, the polymer can be attacked by saturated steam, strong bases, and some high-temperature acid systems. Proper post-cure of Torlon® PAI parts is necessary to achieve optimal chemical resistance.

Please contact your Syensqo Customer Technical Development representative for more information.

More information: Torlon PAI Design Guide.

Torlon® PAI is used across a range of high-performance industries and applications, including aerospace, automotive, and semiconductor manufacturing. Typical uses include thrust washers, seal rings, high-performance bushings and bearings, seals, electrical insulators, and other friction and wear-critical components.

Torlon® PAI base polymer does not contain PFAS, however many Torlon® compounds/formulations might contain various levels of REACH compliant PTFE.

Please contact your Syensqo Customer Technical Development representative for more information.

Torlon® PAI can reduce total cost of ownership by enabling more efficient manufacturing processes and part designs, particularly in comparison to thermoset materials such as polyimides (PI).

As a melt-processable thermoplastic, Torlon® PAI can be extruded, injection molded, or used for coatings, allowing for high-throughput manufacturing. These processes offer a clear cost advantage over materials like PI, which typically require slower and more complex powder sintering methods.

In addition, Torlon® PAI provides the highest strength and stiffness of any thermoplastic up to 260°C (500°F), supporting durable designs that can further optimize performance and lifecycle costs.

Yes. Like other high-temperature engineering resins and composites, Torlon® PAI parts absorb water, but the rate of absorption is slow. If moisture is absorbed, parts can be rapidly restored to their original dimensions and properties by drying.

While both are high-performance polymers, Torlon® PAI generally exhibits higher mechanical strength, stiffness, and impact resistance. For example, Torlon® 4203L demonstrates higher flexural strength and modulus than PEEK. Additionally, Torlon® PAI grades provide significantly stronger impact resistance and toughness compared to PEEK and other advanced engineering plastics.

Yes, specifically formulated wear-resistant grades of Torlon® PAI are designed for use in non-lubricating applications. These grades offer unsurpassed wear resistance in dry environments and are commonly specified to replace metal in components where lubrication is marginal or non-existent.

Yes. In addition to being injection moldable, Torlon® PAI is available in extrusion and compression molding grades used to produce stock shapes. These plaques, rods, and tubes are specifically designed for machining prototypes and low-volume production components.

Torlon® PAI is an ultra-high-performance thermoplastic designed for reliable operation under extreme thermal and mechanical stress. It maintains its mechanical properties, including exceptional strength and stiffness, at temperatures up to 260°C (500°F). At the other end of the temperature spectrum, the material exhibits superior toughness and does not become brittle even at cryogenic temperatures as low as -196°C (-321°F).

Yes. Torlon® PAI is well suited to semiconductor components that require dimensional stability, high-temperature performance, wear resistance, precision machinability and chemical resistance. Typical applications include CMP retainer rings, burn-in and IC test sockets, and precision-machined etch/CVD components.

Torlon® PAI shows good resistance to most commonly used plasma environments, with very low erosion in some cases. This makes it a suitable candidate for selected etch chamber and CVD components where dimensional stability, cleanliness, and mechanical integrity are required.

For more detailed guidance on specific applications, please contact your Syensqo Customer Technical Development representative.
 

Yes. Torlon® PAI is suitable for precision-machined test sockets and handlers because it combines tight-tolerance machinability with high-temperature stability, toughness and electrical performance.

Torlon® PAI typically has a natural dark brown color, which may include visible marbling or variation due to its high-performance polymer structure. This visual appearance is inherent to the material and does not affect its mechanical, thermal, or wear properties.

While Torlon® PAI is not commonly selected for aesthetic applications, color modification is possible in certain cases. For example, black grades can be produced to provide a more uniform appearance and help mask natural color variation.

Coloring options depend on the specific grade, processing method, and application requirements, and should be evaluated on a case-by-case basis.