发明名称 |
RETROREFLECTIVE SHEET, LICENSE PLATE, AND MANUFACTURING METHOD THEREFOR |
摘要 |
PROBLEM TO BE SOLVED: To provide a retroreflective sheet that offers a highly retroreflective property, and weather and chemical resistance required for outdoor use such as license plates.SOLUTION: A retroreflective sheet includes a retroreflective layer 110 and a polyurethane surface protection layer 148, where the surface protective layer 148 contains a reaction product of polyol, having at least either of a polyester skeleton and a polycarbonate skeleton, with a tri- or polyfunctional aliphatic isocyanate and has a glass transition temperature Tg of 50°C or higher and a loss tangent tanδ of 0.1 or less at 120°C.SELECTED DRAWING: Figure 1 |
申请公布号 |
JP2016118584(A) |
申请公布日期 |
2016.06.30 |
申请号 |
JP20140256392 |
申请日期 |
2014.12.18 |
申请人 |
3M INNOVATIVE PROPERTIES CO |
发明人 |
UEDA SAORI;NAKAJIMA TOSHITAKA;TAKAMATSU YORINOBU;EGASHIRA KEN;SAITO KOJI |
分类号 |
G02B5/122;E01F9/619 |
主分类号 |
G02B5/122 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|