| 摘要 |
#CMT# #/CMT# The package has open/close device (1) with an obturation unit (2) that is used as a barrier to prevent gaseous and/or liquid exchange between indoor and external environments of the package. The unit has interlocking elements (3, 4), where each element has tubular joints (7, 8) made of thermoplastic material and disposed between complementary male and female rails (5-1, 5-2, 6-1, 6-2). The rails and the joints are cooperated between them to form a closing seal with gases and/or liquids when internal conditions of the package are in pressure or depression when the package is in closed position. #CMT# : #/CMT# POLYMERS - The rails are made of polyethylene and/or polypropylene. One joint is made of elastomer-thermoplastic. #CMT#USE : #/CMT# Bag type package for protecting and persevering agri-food products. Can also be used for storing other products requiring a protection against oxidation, dust, moisture, drying, insects and odors such as oxydable metals, art works, clothing and specimen of solid, liquid or gas samples of biological or chemical origin. #CMT#ADVANTAGE : #/CMT# The configuration of the open/close device allows to close again the package with gases and/or liquids for several times in an airtight manner in the vacuum and pressure conditions without utilizing soldering machines, and allows to preserve the original sealing during each time of closing and opening of the package. The configuration of the package provides reliable opening/closing device whose speed of closing and the sealing with gases and/or liquids reduces the time of closing and the sealing problems currently encountered on package of large dimension. The utilization of the open/close device sets the package under vacuum and gas for several times without utilizing an electrical exhaust machine and a soldering machine. The package allows the objects with large dimension to be set under vacuum, thus reducing the cost of the package. The package allows storing bulky objects under a reduced volume. The package does not spoil the oxydable products by the oxygen of the air, and avoids the need for coating the products with fat, thus avoiding the generation of the pollution. The package stores the products requiring protection against oxidation, dust, moisture, drying, insects and odors. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows an open/close device in a closed position. 1 : Open/close device 2 : Obturation unit 3, 4 : Interlocking elements 5-1, 5-2, 6-1, 6-2 : Complementary male and female rails 7, 8 : Joints. |
