Title:
RETROREFLECTIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2021/085478
Kind Code:
A1
Abstract:
This retroreflective sheet 9 includes: a surface layer 1; a glass-bead holding layer 5 that contains glass beads; and a metal reflective layer 4 on the back-face side of the glass-bead holding layer 5. Glass beads 3 are arranged in random positions in a cross-sectional view; the surface layer 1 is a vinyl chloride resin layer; and between the vinyl chloride resin layer and the glass-bead holding layer, a barrier layer 2 for preventing degradation of the metal reflective layer is included. The barrier layer 2 is preferably an alkyd-melamine resin layer. Due to this configuration, it is possible to prevent a reduction in the reflection function or the like of the metal reflective layer on the back-face side of the glass-bead holding layer, thereby enabling enhanced weatherability to be maintained and providing a retroreflective sheet with wide-angle reflectivity and improved surface printability.
Inventors:
MAEKAWA IPPEI
MAEDA YUKIHIRO
MAEDA YUKIHIRO
Application Number:
PCT/JP2020/040448
Publication Date:
May 06, 2021
Filing Date:
October 28, 2020
Export Citation:
Assignee:
KIWA CHEMICAL IND CO LTD (JP)
International Classes:
E01F9/619; B32B27/30; G02B5/128
Foreign References:
| JP2013508748A | 2013-03-07 | |||
| CN206411287U | 2017-08-15 | |||
| JP2005292805A | 2005-10-20 | |||
| JP2000508434A | 2000-07-04 | |||
| JP2016215672A | 2016-12-22 | |||
| JP2005292805A | 2005-10-20 | |||
| JP6598343B1 | 2019-10-30 |
Other References:
See also references of EP 3970970A4
Attorney, Agent or Firm:
IKEUCHI & PARTNERS (JP)
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