| 发明名称 |
POLYMER FILMS |
| 摘要 |
Multi-layer polyolefin films for envelope windows, comprising at least three layers wherein the central layer comprises a propylene homopolymer; the layer of film on the outer part of the envelope, which forms the anti-reflective layer, is based on propylene copolymers in mixture with HDPE, HDPE being comprised between 40 and 50% by weight of the mixture; the inner layer in contact with the contents of the envelope is based on ethylene/propylene/butene copolymers, the film being isotropic in relation to shear strength. |
| 申请公布号 |
US2017021972(A1) |
申请公布日期 |
2017.01.26 |
| 申请号 |
US201615217150 |
申请日期 |
2016.07.22 |
| 申请人 |
IRPLAST S.p.A. |
发明人 |
DI COSTANZO Carmelo;MONTAGANO Angelo;PIERSE Michael;TROILO Roberto |
| 分类号 |
B65D27/04;B32B27/32;B32B27/08 |
主分类号 |
B65D27/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A multi-layer polyolefin film for an envelope window, comprising at least three layers, the at least three layers including an inner layer, a central layer, and an outer layer, wherein the central layer comprises a propylene homopolymer;
the outer layer comprises a layer of film on the outer part of the envelope and is based on propylene copolymers in mixture with HDPE, HDPE comprising between 40 and 50% by weight of the mixture; and the inner layer is in contact with the contents of the envelope and is based on propylene copolymers, and wherein the multi-layer polyolefin film is isotropic in relation to shear strength. |
| 地址 |
Empoli IT |
