Pouch filled with phase-change material and method for manufacture thereof

Abstract

A pouch ( 100 ) filled with phase-change material, wherein the pouch comprises a preformed first wall ( 110 ) and a second wall ( 120 ), wherein the first wall comprises a bowl-shaped part, in which the phase-change material is accommodated, and a peripheral part, wherein the second wall is attached to the peripheral part of the first wall, wherein a high vacuum prevails in the pouch, and wherein the pouch is intended for placing against a wall to be heated or cooled.

1 . A pouch filled with phase-change material, wherein the pouch comprises a preformed first wall and a second wall, wherein the first wall comprises a bowl-shaped part, in which the phase-change material is accommodated, and a peripheral part, wherein the second wall is attached to the peripheral part of the first wall, wherein a high vacuum prevails in the pouch, and wherein the pouch is intended for placing against a wall to be heated or cooled. 
     
     
         2 . The pouch as claimed in  claim 1 , wherein the first wall and second wall are at least 40 μm thick. 
     
     
         3 . The pouch as claimed in  claim 1 , wherein the first wall is a first film and the second wall is a second film. 
     
     
         4 . The pouch as claimed in  claim 1 , wherein the bowl-shaped part of the first wall is formed by thermoforming the first film. 
     
     
         5 . The pouch as claimed in  claim 1 , wherein the first wall and second wall each comprise a welding layer and a barrier layer, wherein the welding layer of the first wall is welded to the welding layer of the second wall. 
     
     
         6 . The pouch as claimed in  claim 4 , wherein the welding layer comprises polypropylene and the barrier layer comprises polyamide. 
     
     
         7 . The pouch as claimed in  claim 1 , wherein the first wall and/or the second wall comprises a layer manufactured from aluminium. 
     
     
         8 . The pouch as claimed in  claim 1 , wherein the first wall and/or the second wall are manufactured by injection moulding. 
     
     
         9 . The pouch as claimed in  claim 1 , wherein the pouch is intended for placing with the second wall against a part to be heated or cooled, and wherein the first wall has better thermally insulating properties than the second wall. 
     
     
         10 . The pouch as claimed in  claim 1  wherein the pouch is filled with phase-change material not accommodated in capsules. 
     
     
         11 . The pouch as claimed in  claim 1  wherein the second wall is a preformed wall. 
     
     
         12 . A piece of crockery provided with a pouch as claimed in  claim 1 , wherein the pouch is situated in the crockery and wherein the pouch is placed with the second wall against a wall of the crockery to be heated or cooled. 
     
     
         13 . A method for manufacturing a pouch filled with phase-change material, wherein the method comprises of:
 shaping a first wall of the pouch such that the first wall comprises a bowl-shaped part and a peripheral part;   placing the phase-change material in the bowl-shaped part of the shaped first wall;   attaching a second wall of the pouch to the peripheral part of the shaped first wall such that the phase-change material is situated between the first and second walls, and that a high vacuum prevails in the pouch.   
     
     
         14 . The method as claimed in  claim 13 , wherein the shaping of the first wall of the pouch comprises of thermally preforming the first wall of the pouch. 
     
     
         15 . The method as claimed in  claim 13 , wherein the shaping of the first wall comprises of injection moulding the first wall. 
     
     
         16 . The method as claimed in  claim 13 , wherein attaching a second wall to the peripheral part of the shaped first wall comprises of:
 positioning the first and second wall relative to each other such that the second wall is attachable at the peripheral part of the first wall;   drawing a vacuum in the space between the first wall and the second wall; and   sealing the pouch at the peripheral part of the first wall.   
     
     
         17 . The method as claimed in  claim 16 , wherein sealing of the pouch at the peripheral part of the first wall comprises of welding or glueing the second wall to the peripheral part of the first wall. 
     
     
         18 . The method as claimed in  claim 13 , wherein placing of the phase-change material in the bowl-shaped part of the shaped first wall comprises of melting the phase-change material, casting the molten phase-change material in a mould and, after cooling, placing the hardened phase-change material in the bowl-shaped part. 
     
     
         19 . The method as claimed in  claim 13 , comprising of shaping the second wall of the pouch prior to the attachment. 
     
     
         20 . The method as claimed in  claim 19 , wherein the shaping of the second wall comprises of injection moulding the second wall or thermally preforming the second wall. 
     
     
         21 . The method as claimed in  claim 2 , wherein the first wall and second wall have a thickness of between 50 μm and 150 μm.