Evacuated jacket for thermal insulation and process for...

B - Operations – Transporting – 32 – B

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B32B 27/06 (2006.01) B32B 3/04 (2006.01) B32B 37/04 (2006.01) F16L 59/06 (2006.01)

Patent

CA 2398890

An evacuated jacket for thermal insulation comprises a discontinuous or porous, organic or inorganic filling material arranged inside an envelope made with at least one multi-layer barrier sheet (1) of substantially rectangular shape, which comprises at least one polymeric or inorganic central layer (2) having barrier properties towards atmospheric gases, an upper layer (4) and a lower layer (3), both of a polymeric material. The polymeric material which forms said upper layer (4) and the polymeric material which forms said lower layer (3) of the barrier sheet (1) are mutually heat-sealable and said barrier sheet (1) is folded up so as to superimpose two opposite sides (5, 6) thereof which are welded to each other by melting said upper layer (4) at one margin (6) and said lower layer (3) at the other margin (5). The present invention also relates to a process for manufacturing said evacuated jacket for thermal insulation.

L'invention concerne une enveloppe sous vide d'isolation thermique comprenant une matière de remplissage organique ou inorganique discontinue ou poreuse, placée dans une enveloppe faite d'au moins une feuille barrière (1) multicouche à la forme sensiblement rectangulaire, comprenant au moins une couche centrale (2) polymérique ou inorganique possédant des propriétés de barrière contre les gaz atmosphériques, une couche supérieure (4) et une couche inférieure (3), faites toutes deux d'une matière polymérique. La matière polymérique formant ladite couche supérieure (4) et la matière polymérique formant ladite couche inférieure (3) de la feuille barrière (1) sont thermoscellables, et ladite feuille barrière (1) est pliée de façon à superposer deux de ses côtés opposés (5, 6), soudés l'un à l'autre par fusion de ladite couche supérieure (4) à un bord (6) et de ladite couche inférieure (3) à l'autre bord (5). La présente invention concerne également un procédé de fabrication de ladite enveloppe sous vide d'isolation thermique.

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