Blasting cap

Detonators are relatively small explosive devices that are used for safe ignition of explosives. If a detonator connected with explosives, then one speaks of a shock load or cartridge. As the charging small amounts of high explosives are used, which can be brought even by small thermal or mechanical stress to detonation ( initial explosive ). A two-stage charge consists for example of a primary charge, as a rule, lead azide, and a secondary charge, tetryl or PETN.

Detonators are used in both electric detonators as well as in electronic or non-electrical means of initiation.

The pressure wave generated upon detonation of the initial explosive in the detonator, detonation of the main explosive charge is caused. At very insensitive explosives such as TNT, or cast ANC explosives more sensitive explosives from a booster charge is used to ignite the main charge, as a further safe level.

Previously, detonators and electrically ignitable fuel moment fuses were delivered separately and put each other before use. Today detonators are only in a few cases, such as used for ice or snow field blasting. Here they are crimped with a Würgezange to the Sicherheitsanzündschnur to throw charges can ignite.

• Blasting
• Component ( ammunition)