| 摘要 |
A vacuum thermally insulating material which has a core material comprising a laminate formed by laminating glass fibers in the thickness direction and a cover material covering the core material and having gas-barrier property, wherein the inside of the cover material is evacuated and sealed, and wherein the core material is press-formed at a temperature at which the glass fibers begin to deform slightly by its own weight or the glass fibers become deformable by the load from up and down directions in pressing and at which the shape of the cross section of the glass fibers do not undergo great change, and wherein the glass fibers are stretched through the thermal deformation thereof, and the shape is maintained by the entanglement of some of the glass fibers with one another, not by the adhesion of the glass fibers with one another. |
