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1. IN202147031791 - BIAXIALLY ORIENTED POLYPROPYLENE FILM

Office
India
Application Number 202147031791
Application Date 15.07.2021
Publication Number 202147031791
Publication Date 23.07.2021
Publication Kind A
IPC
C08J
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
B29C
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
H01M
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
H01G
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
Applicants TOYOBO CO., LTD.
Inventors YAMADA, Kouji
HORINOUCHI, Kazuhito
NAKANO, Mahiro
IMAI, Toru
Priority Data 2018-247983 28.12.2018 JP
2019-195470 28.10.2019 JP
Title
(EN) BIAXIALLY ORIENTED POLYPROPYLENE FILM
Abstract
(EN) The present invention provides a biaxially oriented polypropylene film that has excellent heat resistance even at the high temperature of 150°C and high rigidity, easily maintains a bag shape when used as a packaging bag, and also exhibits little pitch displacement during printing and few wrinkles at a sealing portion when heat-sealed. The storage modulus (E'-23) of this biaxially oriented polypropylene film at 23°C in a dynamic viscoelastic measurement is 2.0 GPa or more in the length direction and 6.0 GPa or more in the width direction, and the storage modulus (E'-80) at 80°C in a dynamic viscoelastic measurement is 1.0 GPa or more in the length direction and 3.0 GPa or more in the width direction. The ratio of E'-80 to E'-23 (E'-80/E'-23) is 0.4 or more in both the length direction and the width direction. The thermal shrinkage rate at 150°C is 10% or less in the length direction and 30% or less in the width direction, and the thermal shrinkage rate at 120°C is 2.0% or less in the length direction and 5.0% or less in the width direction. The thermal shrinkage rate at 120°C in the length direction is smaller than the thermal shrinkage rate at 120°C in the width direction.