Thermoinsulating knapsack

Abstract

The present invention relates to a thermoinsulating knapsack for carrying beverages, comprising a sack ( 1 ) provided with straps ( 2 ) for transportation on the back, inside which is arranged a container ( 3 ) for a beverage. Said container ( 3 ) is provided with an opening into which is inserted a flexible tube ( 4 ) which enables the beverage to be sorbed. One or more evacuated panels ( 5, 6 ) comprising an envelope which encloses powder of an inert material with average particle size lower than 100 nanometers are arranged between said sack ( 1 ) and said container ( 3 ).

1 . Thermoinsulating knapsack for carrying beverages, comprising a sack ( 1 ) provided with straps ( 2 ) for transportation on the back inside which is arranged a container ( 3 ) for a beverage provided with an opening into which is inserted a flexible tube ( 4 ) which enables the beverage to be sorbed, characterized in that one or more evacuated panels ( 5 ,  6 ) comprising an envelope which encloses powder of an inert material with average particle size lower than 100 nanometers are arranged between said sack ( 1 ) and said container ( 3 ).  
     
     
         2 . Thermoinsulating knapsack according to the preceding claim, characterized in that the particles of the powder of inert material have an average size comprised between 2 and 20 nanometers.  
     
     
         3 . Thermoinsulating knapsack according to one of the preceding claims, characterized in that the envelope is made of a plastic, optionally metallized material.  
     
     
         4 . Thermoinsulating knapsack according to one of the preceding claims, characterized in that the powder of inert material is mixed with mineral fibers.  
     
     
         5 . Thermoinsulating knapsack according to the preceding claim, characterized in that said mineral fibers are glass fibers.  
     
     
         6 . Thermoinsulating knapsack according to one of the preceding claims, characterized in that said inert material is silica.  
     
     
         7 . Thermoinsulating knapsack according to the preceding claim, characterized in that the silica is pyrogenic silica.  
     
     
         8 . Thermoinsulating knapsack according to the preceding claim, characterized in that said evacuated panels ( 5 ,  6 ) have a thickness comprised between 4 and 15 mm.  
     
     
         9 . Thermoinsulating knapsack according to one of the preceding claims, characterized in that said evacuated panels ( 5 ,  6 ) are two and that they are curved and mutually fastened by means of their flanges so that together they form a tubular body whose cavity is occupied by the container ( 3 ).