Excellent heat resistance, strength and stiffness

Polyamide Resin

Next-generation flame-retardant materials free of halogens and red phosphorus

LEONA™ SN series uses halogen-free and red phosphorus-free flame flame retardance and has obtained the Flame retardance standard "UL94 V-0 (0.75mm)".


Flame retardance polyamide 66 resin is expanding its range of applications, mainly in E&E and automobiles. In particular, Flame retardance properties are required for materials in automobile parts as the number of EVs increases. In addition, red phosphorus-based Flame retardance are considered to be one of the causes of migration, and there is a growing demand for electrical and electronic parts not to use red phosphorus-based Flame retardance.

→Go here for details on" Ion migration inhibiting plastics for electric and electronic component applications"

Excellent laser transparency, laser weldability, and laser-marking behavior

LEONA™ SN-series feature excellent laser transparency, which enables high laser weldability and laser-marking behavior.
For laser light with a wavelength of 940 nm, we compared the transmittance of LEONA™ SN11B—a LEONA™ SN-series with 25% glass-fiber reinforcement—to that of a general non-halogen flame-retardant polyamide (also with a glass-fiber content of 25%). The results showed that the transmittance of LEONA™ SN11B is approximately 2 times greater for natural-colored material and 3-4 times greater for black-colored material. These materials also retain their high laser transparency and joint strength when subjected to specialized black colorization, featuring a highly attractive deep-black appearance.

​LEONA™ SN series can produce high clarity with excellent performance under a broad range of operating conditions.

Laser marking with LEONA™ SN series resins yields clearer, higher-contrast lettering than general non-halogen flame-retardant polyamide resins in both of the following situations: 
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(1) Forming white letters on black-colored items
(2)  Forming black letters on white, gray, or other light-colored items  (including RAL9003 and RAL7035)

​LEONA™ SN series also yield clear laser-marking results for ultra-small letters and symbols under a wide range of operating conditions.

→Go here for details on" Materials for laser welding"

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Excellent electrical properties (CTI, RTI, GWIT, GWFI)

Manufacturers also need Relative Thermal Index (RTI), Comparative Tracking Index (CTI), and Glow Wire Ignitability (GWFI, GWIT) for designing electrical products.
LEONA™ SN series have been certified UL standards for CTI (600V), and the LEONA™ SN11B in particular is UL listed not only for high CTI (600V), but also for high GWFI (960°C), high GWIT (750°C), and RTI Elec. 130°C.


For example, choosing our engineering plastics with outstanding tracking resistance (CTI) enables designers to minimize the creeping distance, helping to reduce product size and weight.

High strength and stiffness retention under wet condition

As shown below,LEONA™ SN11B  keeps a high strength and modulus under wet condition.

​LEONA™ SN11B has a long-life span under wet condition.

Excellent low smoke properties (Certified HL3 by the European railroad standard (EN45545-2))

LEONA™ SN11B features excellent low smoke properties due to the presence of aromatic PA, and has acquired the highest level “HL3” by the European railway standard (EN45545-2*).


*EN45545-2 is the portion of the EN45545 standard that specifies “Requirements for fire behavior of materials and components.

→ Go here for details on" Materials compliant with the EN45545-2 European railway standard"

Improved processability (Mold deposit and metal corrosion)

The use of LEONA™ SN11B, with its lower mold deposit and less corrosion characteristics, may decrease the frequency of maintenance and extend the life of equipment.

→Click here to download slides for the LEONA™ SN series

→Click here for detailed product data for each grade