| 摘要 |
The packing comprises parallel reflective metal sheets or plastic sheets coated on both sides with metal, and intermediate layers of poorly conductive and heat permeable insulating material. The latter has a microscopically rough surface, which is placed against one side of the metal or metal-coated plastic layer. Specif. the insulating material is a vinyl copolymer and the metal Al, Cu, Ag or Au. |
