| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve durability, heat resistance, chemical resistance, embossing suitability, adhesion of printing ink, easiness of embedding a stripe for magnetic recording or laser printing suitability in well balance and to improve restrictions or demerits by coextrusion molding of resin, wet coating or printing of ink as well. <P>SOLUTION: In the information recording medium 10, at least three base materials of a first surface base material 1 using thermoplastic polymer resin, a center core 7 which is a base material using the thermoplastic polymer resin and a second surface base material 2 using the thermoplastic polymer resin are laminated in the position relation of the order, relatively. The thermoplastic polymer resin used for the first surface base material 1 and the second surface base material 2 is crystalline thermoplastic polymer resin base materials 12 and 22 to which a biaxial stretching processing is executed, respectively. For the first surface base material 1 and the second surface base material 2, amorphous thermoplastic polymer resin layers 11 and 23 are formed by the thickness of 2-50μm on the surfaces on the side away from the center core, respectively. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
