| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a packaging material with a check valve which does not interfere with the handling of the packaging material by storing the check valve inside the packaging material, and is a very sanitary packaging material since the check valve is not exposed to the outside.SOLUTION: A packaging material with a check valve comprises: a packaging material made of a plastic film; an outer cylinder made of a cylindrical film and welded to an opening of the packaging material; a housing for a check valve which is mounted inside the outer cylinder, and in which a deaeration port to be fitted with a tube of a vacuum pump is protruded from an upper end of the housing; a check valve in which its valve port is provided toward the deaeration port side in the housing; and a filter member connected to the opening of the check valve by an extension tube. A tube of the vacuum pump which is separately prepared is fitted to the deaeration port of the housing inside the outer cylinder. When the vacuum pump is actuated and air inside the packaging material is discharged, the check valve prevents outside air from being flown back into the packaging material.</p> |
