| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a firing charge exhibiting a high safety during its handling and storing and exhibiting a superior ignitability at the time of cold temperature firing.SOLUTION: Within a burning case 11 are stored an ignition assistance charge 13 containing nitrocellulose together with major firing charge 12 made of triple base firing charge containing diethylene glycol dinitrate as a nitro plasticizer. The ignition assistance charge 13 has: an ignition delay time that is shorter than that of the major firing charge 12: and a gas generation speed that is slower than that of the major firing charge 13. The ignition assistance charge 13 has: a relative ratio of nitrocellulose higher than that of the major firing charge 12; and a web size larger than that of the major firing charge 12. It is preferable that the ignition assistance charge 13 is 5 to 25 mass% with respect to the total mass sum of 100 mass% of the major firing charge 12 and the ignition assistance charge 13.</p> |
