Title:
POLYMER BASED COMPOSITE SUITABLE FOR BOTH LASER MARKING AND PRINTING BY DYE DIFFUSION THERMAL TRANSFER PRINTING
Document Type and Number:
WIPO Patent Application WO/2020/000418
Kind Code:
A1
Abstract:
Disclosed is a polymer based composite, comprising (a) a polyamide component, (b) a (co) -polyamide based on ether units and amide units, and (c) carbon black. Also provided herein is the finding that (1) the (co) -polyamide (b) offers sufficient absorbency for the printing ink, and (2) the selection of the polyamide component and the (co) -polyamide and the amount of the carbon black result in both sufficient transparency and sufficient absorption centers for the laser energy. Also disclosed are the use of, and the moulded article made of the polymer based composite, and a layered structure comprising at least one layer made of the polymer based composite and a security and/or valuable document comprising the layered structure.
Inventors:
YU HUIFENG (CN)
YANG JIANMIN (CN)
TENG FEI (CN)
HERMES FLORIAN (DE)
YE CHENYU (CN)
YANG JIANMIN (CN)
TENG FEI (CN)
HERMES FLORIAN (DE)
YE CHENYU (CN)
Application Number:
PCT/CN2018/093801
Publication Date:
January 02, 2020
Filing Date:
June 29, 2018
Export Citation:
Assignee:
EVONIK SPECIALTY CHEMICALS SHANGHAI CO LTD (CN)
EVONIK DEGUSSA GMBH (DE)
EVONIK DEGUSSA GMBH (DE)
International Classes:
C08L77/06; B32B27/00; B32B27/18
Domestic Patent References:
| WO1998007573A1 | 1998-02-26 |
Foreign References:
| US20050228145A1 | 2005-10-13 | |||
| US20120001413A1 | 2012-01-05 | |||
| CN1143228A | 1997-02-19 | |||
| US20120001413A1 | 2012-01-05 |
Other References:
STARK ET AL., POLYMER, vol. 40, 1999, pages 4001 - 4011
See also references of EP 3609958A4
See also references of EP 3609958A4
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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