THERMALLY COLOR CHANGEABLE SHADING COMPOSITION AND LAMINATE USING THE SAME AND INTERNAL CONCEALING AND DEVELOPING THREE-DIMENSIONAL OBJECT USING LAMINATE

摘要

PURPOSE:To provide a thermally color-changeable shading compsn. reversibly changing not only in color but also in transparency by a temp. change and used in the procuction of a laminate and an internal concealing and developing three dimensional object. CONSTITUTION:A thermally color changeable shading compsn. 4 is constituted by dispersing a thermally color-changeable material devloping and losing a color by the giving and receiving reaction of an electron in a vinyl chloride/vinyl acetate copolymer resin matrix in a finely divided state. This compsn. reversibly changes not only in color but also in transparency and shows such a hysteresis characteristic that the temp. difference between the high temp. trigger and low temp. trigger thereof is at least 10-50 deg.C.