Excellent heat resistance, strength and stiffness
Polyamide Resin

Leona Leona

What is LEONA™ SN series?

LEONA™ S series is an alloy grade of semi-aromatic polyamide (PA) with polyamide 66 (PA66) or polyamide 6 (PA6).
By creating an alloy with a semi-aromatic polyamide, we have successfully overcome the problems of the dimensions changing and the material properties degrading after absorption of water, which are issues with PA66 and PA6. At the same time, the LEONA™ S series also offers a specific strength comparable to die-cast 

 

The product lineup offers the following three grades (series)
Good appearance/high strength: SG
Good appearance/high strength/flame retardant: SN (halogen-free/red-phosphorus -free, flame retardant), SH (halogen flame retardant)
Good appearance/weather resistant: SU

 

This page introduces LEONA™ SN seriesLEONA™ SN series is a non-halogen and red phosphorus-free Flame retardance polyamide resin that considers the environment and safety. It has excellent laser printability, laser weldability, tracking resistance, glow-wire properties, low smoke emission, suppresses changes in physical properties and dimensions when water is absorbed, and has excellent mechanical strength.

LEONA™ SN series Application cases

LEONA™ SN series characteristics

Halogen-free and red phosphorus-free next-generation flame retardant series

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 laser transmittance (light wavelength: 940nm)
Laser transmittance (wavelength: 940 nm)

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: 

(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.

LEONA™ SN series laser marking (black and light colors)
Examples of LEONA™ SN-Series laser marking

Go here for details on" Materials for laser welding"

 Go here for details on" Materials for Laser Marking"

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.

UL standard acquisition list of LEONA™ SN11B, SN103
UL standard acquisition list of LEONA™ SN11B, SN103

High strength and stiffness retention under wet condition

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

High strength and modulus under wet condition
High strength and modulus under wet condition

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

Long-life span under wet condition
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"

LEONA™ SN series lineup

LEONA™ SN11B
  • High mechanical strength and modulus
  • PA66+semi-aromatic PA alloy
  • Glass Fiber reinforced 25%
  • High mechanical strength in wet condition
  • Higher dimensional stability in wet condition
  • Halogen-free, red phosphorus-free flame Flame retardance
  • Excellent laser weldability, and laser-marking behavior
  • Excellent electrical properties (Tracking resistance, glow-wire ignition temperature and RTI Elec. 130°C)
  • Excellent low smoke properties (Acquired HL3, EN45545-2 R22/23)
  • Good surface appearance, moldability
LEONA™ SN103
  • High mechanical strength and modulus
  • PA66+semi-aromatic PA alloy
  • Glass Fiber reinforced 30%
  • High mechanical strength in wet condition
  • Higher dimensional stability in wet condition
  • Halogen-free, red phosphorus-free flame Flame retardance
  • Excellent  laser-marking behavior
  • Excellent electrical propertiess (Tracking resistance)
  • Excellent low smoke properties (Acquired HL3, EN45545-2 R22/23)
  • Good surface appearance, moldability

LEONA™ SN series (halogen-free, Flame retardance) Application cases

Magnetic switches

×

Switches that open and close electrical contacts using electromagnets.
Flame retardant and electrical characteristics are required.

https://www.asahi-kasei-plastics.com/wp-content/uploads/2021/03/magnet.jpg

Related articles

Products

SN11B,SN103 (SN series)

FG170,FG172,FG171,FG173 (FG series)

Features

  • Low wear
  • Electrical properties (CTI PLC0)(SN11B, SN103)
  • Snap-fit property
  • Good moldability
  • Laser printability

Components and devices used to connect cables to each other and to connect power and electrical signals.
Flame resistance, tracking resistance, strength, toughness, etc. are required.

https://www.asahi-kasei-plastics.com/wp-content/uploads/2021/03/connector.jpg

Related articles

Products

SN11B,SN103 (SN series)

FR200,FR650 (FR series)

FG170,FG172,FG171,FG173 (FG series)

Features

  • Flame resistancy (V-0)
  • Electrical properties (CTI PLC0)(SN11B, SN103)
  • High strength and toughness
  • Good moldability
  • Glow wire resistance (FR650、SN11B)

Bus bar cover

×

An insulated protective cover for the conductor through which high voltage and large current of an EV battery flows.
In addition to requiring electrical tracking ability, flame resistance and heat resistance are also required.

https://www.asahi-kasei-plastics.com/wp-content/uploads/2022/12/busbar-cover.jpg

Related articles

Products

SN11B

440Z, 443Z

Features

LEONA™ SN11B

  • High strength
  • Long-term heat resistance (RTI Elec. 130°C)
  • Flame resistance (V-0, non-halogen)
  • Tracking resistance (CTI PLC 0, 600V)

XYRON™

  • Dimensional stability 
  • Low specific gravity (weight reduction through reduced material usage)
  • Flame resistance (V-0, non-halogen)
  • Tracking resistance

Three phase connectors

×

Three phase connector to be mounted inside the drive motor.
Ion migration resistance, flame retardance, and tracking resistance are required because of the high power flow, safety, and miniaturization requirements.

https://www.asahi-kasei-plastics.com/wp-content/uploads/2023/11/three-phase-connector.jpg

Related articles

Products

SN11B

Features

  • Ion migration resistance
  • Flame retardancy  (UL94 V-0)
  • Tracking resistance (CTI 0)
  • Toughness at low temperatures, Impact resistance

High-voltage connectors

×

High-voltage connectors used around the batteries of electric vehicles.
Orange color is required to alert the user to the high voltage. Flame retardancy and tracking resistance are required.

https://www.asahi-kasei-plastics.com/wp-content/uploads/2021/03/highvolt.png

Products

SN11B

Features

  • Excellent surface appearance
  • Flame resistance
  • Tracking resistance (CTI 0)
  • Toughness at low temperatures, Impact resistance

Battery case for electronic component

×

Battery case for electric components of Road bikes.
The battery is built in and must be flame retardant for safety, toughness at low temperatures, and impact resistance. The product printing is also laser-printed.

https://www.asahi-kasei-plastics.com/wp-content/uploads/2023/11/Batteries-for-electric-components.jpg

Products

SN11B

Features

  • Excellent surface appearance
  • Flame resistance
  • Toughness at low temperatures, Impact resistance
  • Laser printability

LEONA™ SN series (halogen-free, Flame retardance) related content

Product Data/Tips for Use *Handling Precautions

LEONA™ handling precautions

The content of this document is based on materials, information, and data available at this time, and may be revised based on new findings. Please note that these are provided as information and are not guaranteed. Therefore, when using our products, please take full consideration of the usage environment, design, etc., and use them at your own risk after judging that there is no problem with the product.

1. Handling Precautions

The following are important points to note when handling LEONA™ that we supply to you. Please use them to ensure safe handling of LEONA™.
Please note that we have prepared a separate Material Safety Data Sheet for handling precautions for LEONA™. Please contact our staff and we will send it to you. Please investigate the safety of any additives other than LEONA™ that you use yourself.

(1) Safety and health precautions
Be careful to avoid eye or skin contact or inhalation of gases generated during drying or melting of LEONA™. Also, avoid direct contact with hot resin. We recommend installing local exhaust ventilation and wearing protective equipment (safety glasses, gloves, etc.) during each operation such as drying and melting.

(2) Precautions regarding combustion
LEONA™ is flammable, so handle and store it away from heat and sources of ignition. If it catches fire, it may emit toxic or suffocating gases. To extinguish a fire, use water, foam or dry chemical extinguishers.

(3) Disposal precautions
LEONA™ can be disposed of by incineration or landfill, but disposal should be entrusted to a certified industrial waste disposal company or local government in accordance with the Waste Disposal and Public Cleansing Law. If you incinerate Leona™ yourself, use incineration equipment that complies with the Air Pollution Control Law and other laws and regulations. Incineration may generate toxic gases such as carbon monoxide and suffocating gases.

(4) Notes on storage
Absolutely avoid resin contamination and moisture absorption. Store in a cool, dry place and start molding immediately after opening. Do not pierce the product bag or let it get wet. Also, do not return spilled resin to the product bag. It is a combustible material (synthetic resins) designated by the Fire Service Act, and should be handled in accordance with municipal ordinances. (Fire extinguishing facility, indoor storage facility, etc.)

(5) Precautions for molding
The appropriate resin temperature for molding LEONA™ is 270-310°C. If the temperature is lower than this, there is a risk of localized deterioration of physical properties due to uneven plasticization. On the other hand, if the temperature is higher than this, there is a risk of gas generation due to decomposition and poor appearance such as silver. However, there are some exceptions such as FR200 and FR370, so be sure to refer to the individual catalogs before molding. Also, do not allow LEONA™ to remain in a molten state in the molding machine cylinder for a long period of time. This will cause the resin to decompose and the molded product to discolor or deteriorate. In that case, replace the inside of the cylinder with polyethylene or similar before molding.

2. Usage

  • -LEONA™ should not be used for implantation into the body or for applications involving direct contact with body fluids or infusions.
  • ・When using for other medical purposes, please be sure to contact us in advance.
  • ・Do not use for applications that come into contact with food, such as food packaging containers.
  • ・Please contact us for details.
  • ・If you are considering using our products for other special purposes, please contact us and we will discuss them individually.
  • ・Please contact our person in charge for details on the compatibility of each grade with the Electrical Appliance and Material Control Law, UL standards, CSA standards, etc.

3.Others

Please be aware of industrial property rights when using this product.

Please contact us to ask any questions, discuss any concerns, and request samples.

Enter PPE Description
sustainability
How Asahi Kasei’s engineering plastics help to achieve carbon neutrality.
 Asahi Kasei Group is adopting policies to accelerate progress toward carbon neutrality.
We introduce our approaches to realize circular economy through our engineering plastics.
Click here for details