| 摘要 |
<p>PURPOSE:To easily detect the existence and degree of gas leakage by making the capacity of an expanded bag larger than the volume of a small-sized bomb in case of sealing the small-sized bomb in a bag made of gas non-permeable resin film. CONSTITUTION:A vacuum pack type small-sized bomb 1 comprises a bag 2 and a small-sized bomb 3 sealed in the bag 2. The bag 2 is made of transparent gas-nonpermeable resin film and sealed up at the peripheral portion 2b by adhesion. The capacity of the expanded bag 2 is larger than the volume of the small-sized bomb 3. When gas leaks from a sealing plate portion 3b, the adhesion of the outer wall 3a of the bomb to the inner wall 2a of the bag is released. When the leakage is further increased, the adhesion is completely released to expand the bag. The existence and degree of gas leakage are detected from the capacity of the adhesion releasing portion and the degree of expansion.</p> |
