US 12,359,085 B2
Printing film from which printing layer can be detached
Masayuki Maeda, Yokohama (JP); Atsushi Fukahori, Yokohama (JP); and Takahiro Yasuumi, Yokohama (JP)
Assigned to TOYO SEIKAN CO., LTD., Tokyo (JP)
Filed by TOYO SEIKAN CO., LTD., Tokyo (JP)
Filed on Apr. 5, 2024, as Appl. No. 18/627,974.
Application 18/627,974 is a continuation of application No. PCT/JP2022/038332, filed on Oct. 14, 2022.
Claims priority of application No. 2021-169883 (JP), filed on Oct. 15, 2021.
Prior Publication US 2024/0247164 A1, Jul. 25, 2024
Int. Cl. C09D 11/54 (2014.01); C09D 11/102 (2014.01)
CPC C09D 11/54 (2013.01) [C09D 11/102 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A printed film comprising a base film, a removable printed layer containing an alkali-removable ink, and a finishing varnish layer, the layers being formed on the base film, wherein
the finishing varnish layer contains at least a curable resin and a curing agent, the curing agent is blended in an amount of less than 40 parts by mass based on 100 parts by mass of the curable resin,
a coating amount of the removable printed layer is 1.2 g/m2 or more and 5.1 g/m2 or less,
the curable resin is an epoxy-based resin, and the curing agent is an isocyanate-based curing agent,
the curing agent is blended in such an amount that an NCO/OH mol ratio is less than 0.525 when another printed layer is not formed on the removable printed layer and when the coating amount of the removable printed layer is 1.2 g/m2 or more and less than 2.6 g/m2,
the curing agent is blended in such an amount that the NCO/OH mol ratio is less than 1.05 when another printed layer is not formed on the removable printed layer and when the coating amount of the removable printed layer is 2.6 g/m2 or more and 5.1 g/m2 or less,
the curing agent is blended in such an amount that the NCO/OH mol ratio is less than 1.05 when another printed layer is formed on the removable printed layer such that a coating amount of the another printed layer is 2.2 g/m2 or more and 11.9 g/m2 or less and when the coating amount of the removable printed layer is 1.2 g/m2 or more and less than 2.6 g/m2,
the curing agent is blended in such an amount that the NCO/OH mol ratio is less than 4.2 when another printed layer is formed on the removable printed layer such that a coating amount of the another printed layer is 2.2 g/m2 or more and 11.9 g/m2 or less and when the coating amount of the removable printed layer is 2.6 g/m2 or more and 5.1 g/m2 or less, and
the removable printed layer is removable from the base film by alkali treatment.