Safety Systems Business

Nippon Kayaku has a long history and a wide variety of technologies related to the study, development, and manufacturing of explosives. Applying these technologies, we have developed our own gas generator "Inflator," which inflates automotive airbags, our small gas generator "Micro Gas Generator," which generates driving force to wind seat belts around vehicles, etc., and our squib, an ignition device, which is a key component of these products. We contribute to enhancing safety in automobile societies by providing such products to the global market.
We have plants in five countries around the world, with plans for further global expansion.

Safety Systems Business

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Safety Systems Business


An inflator is a gas generator for airbags. When a squib that receives an electric signal at the time of a collision operates, it conveys heat to a propellant. Thermal ignition generates gas from burned propellant, which inflates the airbag. Nippon Kayaku manufactures and sells inflators for driver's and passenger's seats, side airbags, and knees. To further enhance the safety of automobiles, we are developing new products.

Micro Gas Generators

Micro gas generators are used in seatbelt pretensioners (mechanisms for winding seatbelts in an automobile collision). A squib, which receives an electrical signal in the event of a car collision, activates and ignites the propellant. The propellant burns and creates pressure that winds the seat belt. Fix your body in the correct position by taking up the seat belt and align it with the inflated airbag. This improves the effectiveness of the airbag and ensures occupant safety. Micro gas generators are also used as a pop-up hood mechanism to raise the bonnet to protect pedestrians.


Squib is an ignition component embedded in the Inflator and Micro Gas Generator. When the sensor senses an impact during an automobile collision, electric current flows into the squib, and the heat generated in the squib ignites the propellant inside the squib, and the squib operates. It is also used in mechanisms to adjust the inflation of airbags to match the occupant's body shape and in battery disconnect unit installed in electric vehicles.

Operating Mechanism of Automobile Safety Parts

  1. The Collision sensor is a device embedded in the front portion of the vehicle, which detects collisions.
  2. The Diagnostic device determines whether a collision is caused by an accident or not.
  3. When determined as an accident, an electrical signal is relayed to the squib.
  4. The squib's explosive agent is ignited by the relayed electrical signal.
  5. Gas generating agent is ignited, and gas is generated.
  6. When the "airbag" is inflated, the "seatbelt pretensioner" retracts the seatbelt, absorbing the shock received by the passenger.

*This process from 1 to 6 is completed in about 0.05 seconds.

PARASAFE® - An Emergency Parachute System for Drones

The use of drones (unmanned aerial vehicles) is being promoted worldwide in the fields of logistics, surveying, inspection, and disaster relief. Nippon Kayaku develops the Parachute Safety Device PARASAFE ® for drones by applying pyrotechnic technologies cultivated in automotive safety components such as air bag inflators and gas generators for seat belts. When PARASAFE ® detects a drop in the drone, the pyrotechnic component is remotely actuated to inject the parachute at high speed and to safely lower the drone. In addition to preventing damage to the drone itself and the equipment it carries, it also protects buildings and people on the ground. PARASAFE ® is full of possibilities for further expanding the scope of drone activities. We will continue to develop products that match various drones based on the needs of the drone industry and expand our lineup.

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