| 摘要 |
The valve bag (1) has a filler device (6) and two ventilation devices (5). The filler device surface that facing to exterior of bag portion, is positively connected to ventilation device surface that facing interior. The portion of surface of ventilation device is formed as inner bottom surface of bag portion. One ventilation device is formed in form of ventilation chamber along bottom portion and is closed on side of filler device. Another ventilation device is arranged between bottom impact plate and two tabs (11,12) on side wall (2) of bag portion. |
