Described herein is a packaging
system (1) for storing a
fluid substance, the packaging
system comprising a pump dispenser (100). The pump dispenser (100) includes a pump
assembly (50), a flexible bag (60), and a connecting shell (30). A flexible bag (60) containing a
fluid substance to be dispensed, wherein the flexible bag has a spout (61); wherein the spout is a sleeve having an inner surface (611) and an outer surface (612). A cavity is formed in the connecting shell (30), and the connecting shell is provided with an upper part (310) and a lower part (320); the pump
assembly comprises: an
actuator 10 having a cavity therein; and a closure (20) connected to the
actuator. The pump
assembly (50) has a housing (51) having an outer surface (510) and a lower end (520). A housing (51) of the pump assembly is located at an upper portion (310) of the connecting shell. The cavity of the connecting shell and the outer surface of the shell of the pump assembly form an
air chamber (330), or the cavity of the shell (51 ') forms an
air chamber (513'). A housing (51) of the pump assembly includes a vent hole (511, 511 '). A housing (51) of the pump assembly has a port (56) at a lower end of the housing. A lower portion (320) of the connecting shell is removably engaged with an outer surface (612) of a spout (61) of the flexible bag. The pump assembly (50) is removably engaged with the flexible bag in a hermetically sealed manner such that when the
actuator (10) is pushed downward and released by a user, air is balanced in the
air chamber (330, 513 ') by means of the vent hole (511, 511') and air is unbalanced in the flexible bag (60). The flexible pouch is gas-tight and / or gradually evacuated during dispensing use.