Moisture-barrier packaging

Abstract

The invention relates to a packaging ( 1 ) comprising a first body that forms a container ( 2 ) and a second body that forms a lid ( 3 ), the said container ( 2 ) and the said lid ( 3 ) having moisture-barrier properties at their respective walls ( 6, 8 ). The lid ( 3 ) has an inner dimension larger than the outer dimension of the container ( 2 ) and slides over at least part of the outer surface of the container, in the process defining a sliding length ( 5 ) when the packaging is being opened or closed. The clearance created by the difference in the said diameters enables the opening and the closing without adversely affecting the moisture-barrier properties of the packaging ( 1 ).

1 . Packaging ( 1 ) comprising a first body that forms a container ( 2 ) and a second body that forms a lid ( 3 ), the said container ( 2 ) and the said lid ( 3 ) having moisture-barrier properties at their respective walls ( 6 ,  8 ), the said lid ( 3 ) having an inner dimension larger than the outer dimension of the container ( 2 ) and sliding over at least part of the outer surface of the container, in the process defining a sliding length ( 5 ) when the packaging is being opened or closed, the clearance created by the difference in the said dimensions enabling the said opening and the said closing without adversely affecting the moisture-barrier properties of the packaging ( 1 ). 
     
     
         2 . Packaging according to  claim 1 , wherein the clearance is between 0.02 mm and 0.5 mm. 
     
     
         3 . Packaging according to  claim 1 , wherein a ratio H/D is greater than 1, H being the sliding length ( 5 ) and D being the outer dimension of the container ( 2 ). 
     
     
         4 . Packaging according tom  claim 1 , wherein the container ( 2 ) and the lid ( 3 ) each comprise a bottom ( 7 ,  9 ). 
     
     
         5 . Packaging according to  claim 1 , wherein the container ( 2 ) and/or the lid ( 3 ) and/or the bottom ( 7 ,  9 ) comprise a structural layer ( 6   a ,  7   a ,  8   a ,  9   a ) and a functional layer ( 6   b ,  7   b ,  8   b ,  9   b ) that provide water vapour-barrier properties. 
     
     
         6 . Packaging according to  claim 5 , wherein the structural layer is based on cellulose with a cellulose content greater than 70%. 
     
     
         7 . Packaging according to  claim 5 , wherein the functional layer is made of high-density polyethylene (HDPE) or polypropylene (PP). 
     
     
         8 . Packaging according to  claim 1 , wherein the functional layer ( 8   b ) that forms the inner surface of the lid ( 3 ) slides over the structural layer ( 6   a ) that forms the outer surface of the container ( 2 ). 
     
     
         9 . Packaging according to  claim 1 , wherein the functional layer ( 8   b ) that forms the inner surface of the lid ( 3 ) slides over the functional layer ( 6   b ) that forms the outer surface of the container ( 2 ). 
     
     
         10 . Packaging according to  claim 9 , wherein the structural layer ( 6   a ) of the container ( 2 ) is trapped between a first functional layer ( 6   b ) that forms the outer surface of the container ( 2 ) and a second functional layer ( 6   c ) that forms the inner surface of the container ( 2 ). 
     
     
         11 . Packaging according to  claim 1 , wherein the lid ( 3 ) comprises a flared end ( 14 ) for making it easier to insert the lid ( 3 ) on the container ( 2 ) and/or the end of the container ( 2 ) on which the lid ( 3 ) is push-fitted comprises a narrowing. 
     
     
         12 . Packaging according to  claim 1 , comprising a tamper-evident system ( 4 ) evidencing the first time the packaging ( 1 ) is opened. 
     
     
         13 . Packaging according to  claim 1 , comprising a membrane seal ( 11 ) secured to the end of the container ( 2 ). 
     
     
         14 . Packaging according to  claim 1 , comprising air outlet or air inlet means ( 13 ) for making it easier to open and close the packaging. 
     
     
         15 . Packaging according to  claim 1 , the said packaging having a circular, oval, oblong or rectangular cross section. 
     
     
         16 . Packaging according to  claim 1 , wherein the container ( 2 ) and/or the lid ( 3 ) are formed from tubular bodies ( 6 ,  8 ) fabricated from a sheet, the ends of which are welded or adhesively bonded and form a joining zone ( 12 ). 
     
     
         17 . Packaging according to  claim 16 , wherein the ends of the sheet are butt-welded via reinforcing strips, or welded or adhesively bonded by overlapping the ends.