Patent ID: 11934148
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Other consumer goods (Other fields)
Classification: CPC G  B | IPC B  G

Claim 14:
15. A light diffraction layer laminated sheet that is laminated on an upper side of a card substrate to form a part of a laminated structure of a card, the card structure comprising:
a card substrate;
a transparent sheet layer laminated on top of the card substrate;
a light diffraction layer configured to have an outer shape smaller than an outer shape of the transparent sheet layer and to be laminated onto an upper side which is one surface side of the transparent sheet layer;
a lower adhesive layer configured to have an outer shape substantially the same in size as a shape of the light diffraction layer and to directly bond the transparent sheet layer and the light diffraction layer together;
a PET layer which has an outer shape substantially the same in size as the shape of the light diffraction layer laminated directly onto the light diffraction later;
an upper adhesive layer configured to be laminated on an upper side of the PET layer and to have an outer shape substantially the same in size as the shape of the light diffraction layer,
a single print sheet layer configured to directly surround all sides which are vertical to the transparent sheet layer for the light diffraction layer, the lower adhesive layer, the PET layer and the upper adhesive layer, and an entire top of the upper adhesive layer, the single print sheet layer having an outer shape substantially the same in size as a shape of the outer shape of the transparent sheet layer wherein a portion of the print sheet layer above the light diffraction layer is laminated onto the light diffraction layer wherein the upper adhesive layer bonds the light diffraction layer and the print sheet layer together and wherein a portion of the print sheet layer directly above the transparent sheet layer is laminated directly onto the transparent sheet layer; and
an upper print layer laminated on the print sheet layer between edges of the card substrate and edges of the outer shape of the light diffraction layer inside the print sheet layer,
wherein a temperature of an appearance of adhesiveness of the upper adhesive layer is higher than a temperature of an appearance of adhesiveness of the lower adhesive layer.