With the counterflow prevention seal where this invention being the pouch for liquefied excretion thing collection in order to collect excretory ones of the liquefied human, demarcates the entrance top which demarcates the collection chamber and bottom, the 1st and 2nd wall which is sealed together according to around those and, the entrance open part which is provided on top of the 1st wall and, the counterflow prevention membrane which is provided on top between the 1st and 2nd walls and, has, as for the counterflow prevention membrane, crosses the 1st wall, in the 1st wall the lower peripheryParalleling, it is sealed, can provide the plural gluing territories in the upper part of the counterflow prevention seal, can provide the plural slits in the counterflow prevention membrane during the counterflow prevention seal and the spot welded zone.本発明は、液状の人間の排泄物を収集するための液状排泄物収集用パウチであって、収集チャンバを画定する入口上部および底部を画定し、それらの周囲に沿って一緒にシールされた第1および第2の壁部と、第1の壁部の上部に設けられた入口開口部と、第1および第2の壁部の間の上部に設けられた逆流防止膜と、を備え、逆流防止膜は、第1の壁部を横切る逆流防止シールにより、第1の壁部にその下方周辺部に沿ってシールされ、複数の接着領域が逆流防止シールの上方に設けられ、複数のスリットが逆流防止シールとスポット溶着部の間の逆流防止膜に設けられる。
