| 摘要 |
[Problem] To provide a check-valve-equipped packaging material in which a check valve is accommodated within a packaging material so as not to interfere with handling of the packaging material, and with which an extremely hygienic packaging material can be achieved because the check valve is not exposed to outside. [Solution] A check-valve-equipped packaging material, characterized by comprising: a packaging material made from a plastic film; an outer cylinder made from a cylindrical film welded to an opening of the packaging material; a check-valve housing that is mounted inside the outer cylinder, and has a deaeration opening which is provided projecting from the upper end thereof and to which the tube of a vacuum pump is attached; a check valve that is provided inside the housing with the valve opening thereof facing toward the deaeration opening side; and a filter member that is coupled to the opening of the check valve by an elongated tube, wherein when the tube of the separately provided vacuum pump is attached to the deaeration opening of the housing inside the outer cylinder and the air inside the packaging material is discharged by operating the vacuum pump, the check valve prevents outside air from flowing back inside the packaging material. |
