Safe drive away time

The safe drive (english safe drive away time, SDAT ) or minimum drive-away (English minimum drive away time, MDAT ) refers to the waiting time, which is necessary, for example after a windshield replacement glazing after installing a windshield to ensure that the vehicle after the installation is safe to operate again.

Technical Background

The use of adhesives for bonding windshields and rear windows is now standard in the automotive industry. In contrast to all other previously used methods, the bonding has gained worldwide very early. The installation of the windows makes a significant contribution to the structural strength of the vehicle.

Airbags explode at speeds up to 340 km / h and lead to a strong load on the windshield of the vehicle. The occupants of the vehicle hit by 50 milliseconds after the explosion in the air bag. That is the reason why the main stress mainly originates on the windshield in a road traffic accident by the inmates. To protect the occupant, the windshield must, which is glued into the generally withstand these forces. In case of replacement glazing this bonding has taken place only a short time before the accident. For this reason it is important that the safe drive-away time of the adhesive disk is known. This safe drive-away time refers to the waiting time, which is observed after a windshield replacement, until the vehicle is back as operational reliability. The criteria for ensuring the safety of the adhesive system are set for the U.S. market in the Federal Motor Vehicle Safety Standards ( FMVSS ) 212/208 of the National Highway Traffic Safety Administration. Usually, the SDAT is determined by means of crash test or high-speed laboratory test.

The acting by the occupant on the disc forces are of course less if the occupants are wearing a seat belt. Therefore, adhesive manufacturers normally provide its customers, what security level has been reached.

Examples

  • Standard meets FMVSS 212/208 with belted crash test dummies
  • Standard meets FMVSS 212/208 with unbelted crash test dummy
Crashtest-Dummy
728670
de