| 摘要 |
PURPOSE:To improve storing performance, water-proof performance, oil-proof performance and anti-plasticizer performance of an image being colored through heating, by containing polyester resin which contains sulfonic acid base as main component into one of a heat-sensitive coloring layer or a barrier layer. CONSTITUTION:A leuco dye system heat-sensitive coloring layer, a barrier layer and a protection layer are provided sequentially onto the surface of a supporting material. A lamination structure having a separator is provided through an adhesive layer onto the rear face of the supporting material, and polyester resin containing sulfonic acid base simultaneously satisfying the condition that a monomer containing sulfonic acid base occupies 6-15 mol.% of the entire dicarboxylic acid while ethylene glycol and ether glycol occupy respectively 85 mol.% or more and 15 mol.% or less of the entire glycol component is contained as main component in one of the heat-sensitive coloring layer or the barrier layer. Consequently, the heat-sensitive coloring layer exhibits excellent water-proof performance, temperature/humidity dependance, anti- plasticizer performance, etc. under severe environment. |
