Abstract: Machine for manufacturing flexible sheet material packagings, including an area for feeding a continuous web of flexible sheet material, a preforming area including an area for folding a bottom wall of the packaging, a welding area, an area for filling the packagings, an area for outputting the packagings, a first chemical decontamination treatment area using a gas, arranged between the preforming area and the filling area, and an outside chamber that surrounds the machine at least partially and is depressed atmospherically with respect to the first area. The outside chamber acts as an additional barrier between the first area and the outside.

Abstract: Machine for horizontally manufacturing flexible sheet material packagings, including an area for feeding a continuous web of flexible sheet material, a preforming area including an area for folding the bottom wall of said packaging and a welding area, an area for filling said packagings, an area for outputting said packagings, a first chemical decontamination treatment area using a gas, arranged between the preforming area and the filling area, and an outside chamber that surrounds said machine at least partially and is depressed with respect to said first area. The outside chamber acts as an additional barrier between the first area and the outside. Outside chamber can be depressed also with respect to atmospheric pressure.