| 摘要 |
An intermediate insulating product (10, figure 1A) comprises a planar insulating layer (11, figure 1A) having a top side in to which is formed a plurality of parallel channels 14 having cross sections with tapered sides. With subsequent mechanical manipulation, the intermediate insulating product can be bent in regions (17, figure 1C) adjacent the bottom of the channels, thereby causing the channels to close to form a non-planar, derivative insulating product. The ends 15,15' of the intermediate insulating product may be bent to be joined 18, the join preferably being held in place by an adhesive strip 19. Adhesive 16 may also be provided in the channels. The intermediate insulating product may be laminated with protective layers (12 and 13; figure 1A) on its top and/or bottom surfaces. |
