Patent ID: 6720055
Filing Date: 2004-04-13
Classification: B32B,G09F,Y10T

Abstract:
A label sheet for electrophotography, the label sheet comprising:a label body including a label base member and an adhesive layer disposed on one surface of the label base member, the label base member including a resin film; and a separator including at least a separator base member, the separator base member including a resin film, the separator being releasably bonded to the adhesive layer, and the separator including a stiffness B, as determined by the following formula (2), of at least 0.21 NÂ·mm: B=EÂ·t3â€ƒâ€ƒFormula (2) in which E represents tensile elasticity in N/mm2 of the separator at 135Â° C., and t represents thickness in mm of the separator at 23Â° C., 50% relative humidity,wherein the separator further includes a thermal shrinkage rate in an MD direction thereof, when subjected to heat treatment at 150Â° C. for 5 minutes, of S % and the label body further includes a thermal shrinkage rate in an MD direction thereof, when subjected to heat treatment at 150Â° C. for 5 minutes, of L %, such that a thermal shrinkage difference A as determined by the following formula (1): A=Sâˆ’Lâ€ƒâ€ƒFormula (1) is in the range âˆ’0.3% to 0.1%.