| 发明名称 |
ENCLOSED-LENS RETROREFLECTIVE SHEETING HAVING TOUGH, WEATHER-RESISTANT, TRANSPARENT COVER FILM |
| 摘要 |
A transparent cover film better protects enclosed-lens retroreflective sheeting and can be applied more economically when it is extruded and is a thermoplastic polymer which has good elongation and minimal elastic memory. Preferred polymers are (a) aliphatic urethanes and (b) polyolefins, especially (c) copolymers of ethylene or propylene, and (d) homopolymers of ethylene or propylene. |
| 申请公布号 |
CA1277648(C) |
申请公布日期 |
1990.12.11 |
| 申请号 |
CA19860521316 |
申请日期 |
1986.10.24 |
| 申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
BAILEY, TERRY R.;HAUNSCHILD, DALE H. |
| 分类号 |
B32B27/00;B32B5/16;B32B7/02;B32B27/08;B32B33/00;E01F9/00;E01F9/04;G02B5/128 |
主分类号 |
B32B27/00 |
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