| 摘要 |
<p>The object of the present invention is to provide a vacuum heat insulator using a core member formed without any binder. The vacuum heat insulator is constructed by enclosing the core material with an enveloping material which is formed by a rigid or flexible plastic sheet, a film to which a metal foil or a metal coating is deposited, or the like. The core material is formed by fiberizing a glass material with a melting centrifugal method, applying water by spraying on glass wool which has just been fiberized, cutting both ends of the glass wool aggregated on a conveyor so as to prepare a glass wool chip, laminating the glass wool chips and compressing so as to form a glass wool mat, and conducting heating press forming to the glass wool mat.</p> |
