Polymer dispersed liquid crystal information recording medium with information recording layer comprising acrylic or methacrylic resin having molecular weight of 25,000 to 100,000 and information recording and reproducing method

An information recording medium, comprising an information recording layer of acrylic resin or methacrylic resin being laminated on an electrode layer, a liquid crystal phase that is a nematic phase or a cholesteric phase at operating environmental temperature being dispersed and fixed on said information recording layer, whereby weight average molecular weight of said acrylic resin or methacrylic resin is 25,000 to 100,000 and has an acid number of 2 or more.

An information recording medium, comprising an information recording layer of acrylic resin or methacrylic resin and an electric charge retaining layer that are sequentially laminated on an electrode layer, a liquid crystal phase that is a nematic phase or a cholesteric phase at operating environmental temperature being dispersed and fixed on said information recording layer, whereby weigh average molecular weight of said acrylic resin or methacrylic resin is 25,000 to 100,000.

An electrostatic information recording and reproducing method, characterized in that an information recording medium is placed face-to-face to a photosensitive member comprising a photoconductive layer formed on an electrode layer, said information recording medium comprising an information recording layer of acrylic resin or methacrylic resin being laminated on an electrode layer, a liquid crystal phase that is a nematic phase or a cholesteric phase at operating environmental temperature being dispersed and fixed on said information recording layer, said resin having weight average molecular weight of 25,000 to 100,000, electrostatic information recording is performed by exposing to light from the direction of the photosensitive member of the information recording medium while applying a voltage between said two electrodes, and electrostatic information is recorded and stored as visible information and is reproduced at any time desired.

An electrostatic information recording and reproducing method, characterized in that an information recording medium is placed face-to-face to a photosensitive member comprising a photoconductive layer on an electrode layer, said information recording medium comprising an information recording layer made of acrylic resin or methacrylic resin being laminated on an electrode layer, a liquid crystal phase that is a nematic phase or a cholesteric phase at operating environmental temperature being dispersed and fixed on said information recording layer, said resin having weight average molecular weight of 25,000 to 100,000 and an acid number of 2 or more, electrostatic information recording is performed by exposing to light from the direction of the photosensitive member or the information recording medium while applying a voltage between two electrodes, and electrstatic information is recorded and stored as visible information and reproduced at any time desired.