Vacuum heat insulating material and manufacture thereof and heat insulating box body using vacuum heat insulating body therein

摘要: PURPOSE: To reduce the number of a projection in heat fusion position which is formed around vacuum insulating material. CONSTITUTION: A core material 33 positioned on film shaped thin body 31, 31 folded back for covering 33, and this condition, inside vacuumed. Both partial bodies are joined each other by folding it stuck to means three circumferential edges. At time, part where one end surface so as prevent from being 29 23 fusion. COPYRIGHT: (C)1995,JPO