Abstract: A dried food fresh-keeping packaging bag structure includes a packaging bag and a fresh-keeping device in the packaging bag. The fresh-keeping device includes a storage box. One side of the storage box is attached to an inner surface of the packaging bag. The storage box has a storage chamber filled with a preservative. One side of the storage chamber is formed with an outlet provided with a breathable film to block the preservative. An outside of the breathable film is provided with a sealing film to seal the storage chamber. One end of the sealing film extends to an outside of a mouth of the packaging bag to form a pull portion. When in use, the pull portion is pulled to tear the sealing film from the fresh-keeping device, so that the dried food product in the packaging bag is kept dry by the preservative.

Abstract: A dried food fresh-keeping packaging bag structure is provided. When the user wants to pack a dried food, a pull portion of a fresh-keeping exhaust valve is pulled outwardly toward the outside of the mouth of the packaging bag to tear a first sealing film to open a filling chamber. Then, the dried food is placed into the packaging bag, and the mouth of the packaging bag is closed. The exhaust valve blocks the outside air from returning to the interior of the packaging bag to provide a non-return exhaust effect. A preservative in the filling chamber communicates with the interior of the packaging bag to dehumidify or deoxidize the air remaining in the packaging bag.

Abstract: A dried food fresh-keeping packaging bag structure is provided. When the user wants to pack a dried food, a pull portion of a fresh-keeping exhaust valve is pulled outwardly toward the outside of the mouth of the packaging bag to tear a first sealing film to open a filling chamber. Then, the dried food is placed into the packaging bag, and the mouth of the packaging bag is closed. The exhaust valve blocks the outside air from returning to the interior of the packaging bag to provide a non-return exhaust effect. A preservative in the filling chamber communicates with the interior of the packaging bag to dehumidify or deoxidize the air remaining in the packaging bag.

Abstract: A packaging bag fresh-keeping exhaust valve structure is an exhaust valve and includes a valve body, a valve plate and a preservative. The valve body includes a partition to partition its internal space into a valve chamber and a filling chamber. The partition has at least one through hole, so that the valve chamber communicates with the filling chamber through the through hole. The valve plate is disposed in the valve chamber. An outer peripheral edge of the valve chamber has a flange extending outwardly. A surface of the flange is provided with a first sealing film to confine the valve plate within the valve chamber. The preservative is disposed in the filling chamber. An inlet end of the filling chamber is provided with a breathable film to confine the preservative within the filling chamber. An outer end of the breathable film is provided with a second sealing film.

Abstract: A dried food fresh-keeping packaging bag structure includes a packaging bag and a fresh-keeping device in the packaging bag. The fresh-keeping device includes a storage box. One side of the storage box is attached to an inner surface of the packaging bag. The storage box has a storage chamber filled with a preservative. One side of the storage chamber is formed with an outlet provided with a breathable film to block the preservative. An outside of the breathable film is provided with a sealing film to seal the storage chamber. One end of the sealing film extends to an outside of a mouth of the packaging bag to form a pull portion. When in use, the pull portion is pulled to tear the sealing film from the fresh-keeping device, so that the dried food product in the packaging bag is kept dry by the preservative.