| 发明名称 |
Multilayer polyurethane protective films |
| 摘要 |
A multilayer protective film comprising a first layer, a second layer and a PSA layer. The first layer at least comprises a polyester-based polyurethane, a polycarbonate-based polyurethane or a combination or blend of both. The second layer at least comprises a polycaprolactone-based thermoplastic polyurethane. The PSA layer comprises a pressure sensitive adhesive. One major surface of the first layer is bonded to one major surface of the second layer, and the PSA layer is bonded to an opposite major surface of the second layer such that the second layer is sandwiched between the first layer and the PSA layer. |
| 申请公布号 |
US8765263(B2) |
申请公布日期 |
2014.07.01 |
| 申请号 |
US200611912905 |
申请日期 |
2006.04.26 |
| 申请人 |
3M Innovative Properties Company |
发明人 |
Ho Charlie C.;Halford Kenneth J. |
| 分类号 |
B32B7/12;B32B27/36;B32B27/00 |
主分类号 |
B32B7/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A multilayer protective film comprising:
a first layer comprising a polyurethane, said polyurethane being a polyester-based polyurethane, a polycarbonate-based polyurethane or a combination of both; a second layer comprising a polycaprolactone-based thermoplastic polyurethane; and a PSA layer comprising a pressure sensitive adhesive, wherein said first layer is bonded to one major surface of said second layer and said PSA layer is bonded to an opposite major surface of said second layer such that said second layer is sandwiched between said first layer and said PSA layer. |
| 地址 |
Saint Paul MN US |
