Two-wheeler technical know-how: Envalior’s materials provide strength & durability that electric scooters need

Crowded Asian cities provide an incredible opportunity for the growth of the e-scooter market. The high cost of internal combustion and electric cars is one significant reason, but e-scooters provide more mobility on traffic-clogged streets where there is limited availability of parking spaces and charging stations for cars.

Government action to reduce air pollution will further drive the market towards e-scooters. At the end of 2018, the local government in Delhi, India, released a draft policy that has a target mandate for 25% of all new vehicle registrations in the city to be electric. Yet, the lack of charging infrastructure for electric cars further impedes growth for this market segment. E-scooter batteries, on the other hand, can be designed to be portable and charged wherever a standard electrical outlet is available.

A number of e-scooter components require specialized materials to ensure safe and reliable performance. Envalior’s portfolio includes materials designed to meet the specific needs of these applications.


Two-wheelers require high-voltage charging and interconnection systems to enable sufficient power to drive the main e-motor and produce acceptable battery charging times. Yet, with high voltages, engineers need to take extra care in the design of parameters, such as dielectric strength, creep and tracking resistance.

Envalior offers a wide range of flame-retardant plastics that deliver the required electrical performance, with a Comparative Tracking Index (CTI) of more than 600V, dielectric strength of more than 30kV and a Relative Temperature Index (RTI) of 140°C. These compounds, available in a variety of colors, are halogen- and red phosphorous-free, so they can achieve the high CTI required for these applications and deliver the highest level of flame retardancy with a UL94-V0 rating.

By avoiding any ionic heat stabilizers, Envalior has ensured full protection against potential electric corrosion of assembly bins or critical aluminum bonding wires within semi-conductor chips. Our materials offer the high mechanical strength of polyamides and work with a variety of assembly designs, including press fit, wave soldering and reflow soldering.

Connectors are an essential component in any e-scooter assembly. These connectors must maintain their integrity over the lifetime of the vehicle, even in the harshest environmental conditions, including exposure to dust, moisture, temperature cycling, chemical exposure and intense vibrations.

Connectors need to meet the following requirements:

  • Unlimited shelf life (JEDEC MSL1)
  • No pin corrosion (by using an insulation material free from halogens and red phosphorous and without ionic heat stabilizers)
  • High continuous use temperatures of 150-180°C
  • Excellent chemical resistance
  • High ductility
  • High electric strength and CTI of 600V or higher

Our best-in-class material solutions, ForTii JTX2 and ForTii Ace JTX8, combine the dimensional stability and low moisture-absorption of polyesters with the high mechanical strength of polyamides. ForTii Ace JTX8 is the only material in the world that meets JEDEC MSL1 while ensuring zero blistering over an infinite shelf life.

With the highest mechanical strength, it ensures excellent reliability during assembly and after years of use in harsh conditions. Envalior also offers ForTii T11, which delivers the highest level of flame retardancy with a UL94-V0 @ 0.2mm rating.

Talk to us today about the material requirements for your e-scooter connectors. You can also visit plasticsfinder.com for additonal technical information. 

Dr. Tamim Peter Sidiki

Global Marketing Manager of Mobility

Published on

25 March 2019


  • Blog
  • Transportation
  • Motorbikes & Bicycles
  • Connectors
  • ForTii in automotive electronics
  • Flame retardancy


Two wheeler whitepaper

Engineering Thermoplastics shape the Electrification of the Automobile

Popular blogs


Dr. Tamim Peter Sidiki

Global Marketing Manager of Mobility

Dr. Tamim Peter Sidiki is Global Marketing Manager of Mobility. Tamim holds a Master Degree in Physics and a Ph.D. in Electrical Engineering obtained at Universities in Germany, Sweden and Scotland. Tamim has more than 20 years of experience in the consumer and automotive electronics industry and has been with Envalior since October 2007.

Subscribe to our monthly newsletter

Leave your e-mail address below to start receiving the latest news about plastics, new products and events delivered to your inbox. 

I agree with Envalior's Terms and Conditions and acknowledge that Envalior will process my personal data for the purposes described in our Privacy Policy.