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Woven and non-woven fabrics

LASTAN™ for EV battery

  • Batteries
  • Others

Marketing Areas

  • ALL

Lastan™ EV grade not only have a high LOI and excellent processability derived from organic fibers, but also withstand flames and particle blasts up to 1300℃ and have high performance in preventing heat transfer.

Feature

  • Flame retardancy
  • Heat resistance
  • Processability

Usage

  • Top Cover for LIB pack
  • Inter-cell thermal insulator and compression pad for LIB
  • Filler for LIB pack, thermal blankets

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Woven and non-woven fabrics

LASTAN™ for EV battery

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In addition to its excellent flame resistance, heat insulation, and electrical insulation properties, this lightweight, flexible organic fiber fabric contributes to improved safety performance in the event of thermal runaway of high-capacity batteries by preventing temperature rise and fire spread.

In addition to its excellent flame resistance, heat insulation, and electrical insulation properties, this lightweight, flexible organic fiber fabric contributes to improved safety performance in the event of thermal runaway of high-capacity batteries by preventing temperature rise and fire spread.

Feature01

Flame retardancy

While a LOI value of 27 or higher is generally considered to indicate flame retardance, this material has 50 or higher. In UL94 flame retardance testing, Lastan™ has obtained the highest rating of 5VA. This is ideal as a base fabric or surface material for high-performance materials that comply with various flame-resistant and flame-retardant standards.

Feature02

Heat resistance

This grade, with a special flame-retardant finish, has high flame resistance and particle blast resistance*1 without holes even when exposed to a flame of 1300℃ for 1 minute and high-pressure blast of 200μ to 500μ particles. In addition, this material has an insulation performance of up to 3.5kV at a thickness of 1mm, ensuring electrical safety*2 .

*1: Blast resistance: refers to the ability of a material or structure to withstand explosions and impacts. This minimizes the effects of explosions on buildings and vehicles, preventing their destruction.
*2: Each value is based on in-house research.　

Feature03

Processability

LASTAN™ features outstanding processability, being highly flexible while maintaining its performance characteristics in sheets as thin as 0.8mm. This makes it easily processed with ordinary tools, contributing to a simplified manufacturing process.
It is also much lighter than carbon and inorganic fibers. These characteristics allow various post-processing (adhesive tapes, etc.), such as composites with other materials, and contribute to improved machinability of parts while providing flame retardancy.

Usage example01

Top Cover for LIB pack

Filling gaps in battery packs

In addition to having a high LOI of over 50, low-density nonwovens can fill gaps in battery packs. By getting rid of the oxygen that was in that space, this can slow the spread of fire.

Usage example02

Inter-cell thermal insulator and compression pad for LIB

Flame retardant and heat insulating materials

Lastan™, a woven fabric with excellent processability, provides a solution to thermal runaway in EV battery design when combined with other materials or post-processed.

Usage example03

Filler for LIB pack, thermal blankets

Filling gaps in battery packs

In addition to having a high LOI of over 50, low-density nonwovens can fill gaps in battery packs. By getting rid of the oxygen that was in that space, this can slow the spread of fire.

Organic non-woven fabric with excellent flame retardancy

Read an interview about this product

As electric vehicle adoption surges globally, managing battery heat and safety becomes critical. Discover how innovative materials like Asahi Kasei’s flame-resistant Lastan™ fiber and flame-retardant SunForce™ foam are revolutionizing EV safety and performance. Read more to explore their potential in extending driving range and enhancing vehicle safety.

Battery Thermal Management

Other Applications

(1) Flameproof and flame-retardant materials: Fire resistant sound absorption materials for railways, flameproof materials for household appliances, flameproof materials for air conditioners, and other applications.
(2) Applications related to safety and flame prevention: Welding/fusing spark protection sheets, emergency evacuation clothing, and other applications.
(3) Infrastructure-related applications: Underground cable coverings.

Product Q&A

QCan post-processing be applied to LASTAN™?

A Lastan™ is a flexible material like wool, although it is flame-retardant. Compared with inorganic fiber such as glass fiber and silica fiber, it excels in processability. Combining LASTAN™ with other materials can lead to the creation of new performance. Therefore, it can be post-processed according to the intended application.

QWhat types of LASTAN™ do you provide?

A LASTAN™ can be broadly classified into three types: nonwovens, wovens, and EV use (flame retardants added).

QDoes it have insulation performance?

A It does not conduct electricity due to its high specific resistance value of 108 to 1010Ω, and it is used as a flame-retardant material for home appliances. LASTAN™ for EV battery has an insulation performance of up to 3.5kV with a thickness of 1mm and is electrically safe.

QWhere is this manufactured?

A We currently manufacture in Japan and Thailand. Many inquiries are coming from other regions and we are considering a new manufacturing location.

QFor what applications is LASTAN™ non-woven fabric used?

A It is mainly used for home appliances, railways, and vehicles. These applications include flameproof materials for household appliances, flameproof materials for air conditioners, insulation around engines, and fire resistant sound absorption materials for railways. For home appliances, LASTAN™ contributes to preventing ignition from familiar home appliances such as air conditioners, vacuum cleaners, washing machines, and coffee makers.

QWhat other applications can this be used for besides EV batteries?

A It is mainly used for home appliances, railways, and vehicles. These applications include flameproof materials for household appliances, flameproof materials for air conditioners, insulation around engines, and fire resistant materials for railways.

QHow long can it be used?

A The deterioration of the fabric depends on the usage environment and the distance from the heat source. The fabric gradually deteriorates under extreme temperature environment.

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