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1. (WO2017057506) POLYESTER LABEL AND PACKAGING CONTAINER

Pub. No.:    WO/2017/057506    International Application No.:    PCT/JP2016/078707
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Thu Sep 29 01:59:59 CEST 2016
IPC: G09F 3/04
B65D 23/08
C08G 63/16
C08J 5/18
Applicants: TOYOBO CO., LTD.
東洋紡株式会社
Inventors: HARUTA, Masayuki
春田 雅幸
TABOTA, Norimi
多保田 規
Title: POLYESTER LABEL AND PACKAGING CONTAINER
Abstract:
The present invention provides a label that is thin, yet excels in crack resistance during transport. This polyester label is characterized in that requirements (1) to (6) are satisfied. (1) The thickness of a base film of the label is 8-30 μm; (2) the limiting viscosity of polyester constituting the label is 0.58 dl/g or greater; (3) the tensile elongation at break in both the main shrinkage direction of the label and a direction orthogonal to the main shrinkage direction is 5% or greater; (4) when the absorbance at 1340 cm-1 and absorbance at 1410 cm-1 of the base film constituting the label are determined by a polarized ATR method, the difference between the absorbance ratio (1340 cm-1/1410 cm-1) in the main shrinkage direction of the label and the absorbance ratio (1340 cm-1/1410 cm-1) in the direction orthogonal to the main shrinkage direction is 0.2 or greater; (5) the difference in specific heat capacity ΔCp before and after Tg, when the reversible heat capacity curve of the base film constituting the label is measured using a temperature-modulated differential scanning calorimeter, is 0.2 J/(g·°C) or greater; (6) the difference between the maximum value and the minimum value of the vertical-direction length of the label is 3 mm or less.