GLASS ROLL AND PROCESS FOR PRODUCING GLASS ROLL

摘要

A glass roll obtained by winding a glass film into a roll is provided in which the glass film has an optimized minimum winding radius.  The glass film is hence prevented without fail from breaking due to static fatigue and can be stored over long. The glass roll (1) obtained by winding a glass film (2) into a roll has been configured so that the glass film (2) has a minimum winding radius (R) satisfying the relationship R=(T/2)[(2.3/s)×E-1], wherein s, T, and E respectively are the flexural strength, thickness, and Young's modulus of the glass film determined through a three-point bending test.