Invention Grant
- Patent Title: Volume hologram sheet to be embedded, forgery prevention paper, and card
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Application No.: US16376410Application Date: 2019-04-05
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Publication No.: US11077698B2Publication Date: 2021-08-03
- Inventor: Nobuko Oikawa , Minoru Azakami
- Applicant: DAI NIPPON PRINTING CO., LTD.
- Applicant Address: JP Tokyo-to
- Assignee: DAI NIPPON PRINTING CO., LTD.
- Current Assignee: DAI NIPPON PRINTING CO., LTD.
- Current Assignee Address: JP Tokyo-to
- Agency: Locke Lord LLP
- Priority: JP2010-009417 20100119,JP2010-046990 20100303
- Main IPC: B42D25/328
- IPC: B42D25/328 ; B42D25/455 ; B42D25/46 ; G03H1/00 ; G03H1/02 ; B29C65/48 ; B42D25/41 ; B42D25/355 ; B42D25/47 ; B42D25/475 ; B29C65/00 ; G09F3/00 ; C09D11/02 ; D21H21/42 ; B29C65/82 ; B32B37/12 ; C09J7/35 ; B32B7/12 ; B32B27/08 ; B32B27/32 ; B32B27/36 ; B32B37/18 ; C09D11/037 ; C09D11/106 ; C09D127/06 ; C09D131/04 ; C09D133/14 ; C09J11/06 ; C09J133/08 ; D21H21/40 ; B29L17/00 ; B29K633/00 ; B29K667/00

Abstract:
An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.
Public/Granted literature
- US20190232709A1 VOLUME HOLOGRAM SHEET TO BE EMBEDDED, FORGERY PREVENTION PAPER, AND CARD Public/Granted day:2019-08-01
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