| 摘要 |
PURPOSE: To make it possible to sustain a functionally helpful state by making the elastic displacementΔf of a sheet larger by max. 2 times within the range of a load of about 1.5 to about 3.6p than the elastic displacementΔfV,ΔfN and obtainingΔfN:ΔfV<=2. CONSTITUTION: The elastic displacement of the sheet is made larger by max. 2 times within the range of a load of about 1.5 to about 3.6p than the displaement of the sheet having 50μm thickness in both cases; the case the sheet is not exposed to the effect of heat of about 85 deg.C and the case the sheet is exposed to the heat of about 85 deg.C (displacementΔfV,ΔfN). In addition,ΔfN:ΔfV<=2 is obtd. As a result, the effect is maintained under the temp. effect of about 85 deg.C and more particularly under the long-time termal effect of about 85 deg.C even after supporting for the purpose of forming the sheet having the folds in a longitudinal direction.
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