| 摘要 |
<p>A panel (10) of thermal insulating material has a layer (12) of compressed microporous insulating material in a tray (14). The tray includes peripheral portions of rigid flanged strip (16) spot-welded together to form a frame. A sheet (22) of self-adhesive aluminium foil is secured to the strip material by the adhesive and forms the base of the tray. Many different sizes and shapes of tray can be made without any need for a wide variety of component materials. During compression of the insulating material a patterned sheet (34), such as expanded metal, can be placed under the aluminium foil to emboss it, so as to remove creases and provide a neat and attractive finish.</p> |
