| 摘要 |
<p>PURPOSE:To provide a high orientation rate and improve insulation performance by forming hard urethane foam of continuous bubble structure via a double conveyor, removing a skin from the foam and slicing the foam in the same direction as the travel of the double conveyor for use as a core material. CONSTITUTION:A vessel 3 is filled with a hard urethane foam core material 2 having continuous bubble structure, a barrier material 5 and an adsorbing agent 6. Then, the vessel 3 is sealed with a cover material 4, thereby forming a vacuum insulation pack 1. In this case, the hard urethane foam core material 2 is made by removing the skin layer 14 of hard urethane foam 13 of continuous bubble structure manufactured with a double conveyor and slicing a product 15 so obtained in the same direction A as the travel of the double conveyor. As a result of slicing the product 15 in the same direction, an orientation rate is improved, thereby enabling heat conduction to be lowered.</p> |
