| 摘要 |
A preparation of metal phosphore prepacked preferably in crap paper bags is sealed between two layers of a moisture-free, non-hygroscopic, flexible, plastic sheet band, of which at least one layer let moisture pass through. Pockets for the preparation are formed by means of welding beads made at regular intervals transversally to the band. The welding beads arranged between the pockets make up inflexion points. Then, the band (1) containing the bags and having a length comprised between 3 and 10 m. is wound so as to form a cylindrical body (39) which is introduced into an air tight tin box. The box is open only just before making use of the preparation at the location of the gas treatment. The band is unwound onto the surface of, for example, a bulk material to be treated such as wheat and is extended freely. The gasing bottle is kept sealed until the end of the gasing, i.e. during several days. Following a reaction of the preparation with the air moisture, very toxic gases phosphorous hydrogen are formed which, during gasing, diffuse slowly through all the bulk material. A the end of the gasing, the band containing eventually remains of the preparation is removed, wound and evacuated for destruction. |
