| 摘要 |
PURPOSE:To make possible the preservation and rewriting of an image by sandwiching a porous material which is formed into a sheet-like thin film with a pair of flexible substrates and packing the pores of the porous material with a liquid crystal material exhibiting a thermooptic effect. CONSTITUTION:A PET sheet having 50mum film thickness is used as the flexible substrates 1 and 2. A 'Teflon(R)' porous body having 40mum film thickness, 1mum average pore size and 75% voids is used for the porous material 3 of the thin film. The liquid crystal which exhibits a smectic A phase at an ordinary temp. is packed into the pores of the material 3 by which an image recording medium 4 is obtd. The thin film consisting of the porous material having prefer ably 20-100mum film thickness, 0.1-1mum average pore size and 50-75% voids is adequate. A liquid crystal mixture composed of a nematic liquid crystal and cholesteric liquid crystal or a smectic liquid crystal having a nematic phase, etc. are used as the liquid crystal. A large area ratio of the recording medium is thus easily obtd. and the flexible recording medium is made obtainable by the integral formation with the flexible substrates. |
