Process for forming a laminate
US11965067B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2019 |
| Grant date | Apr 23, 2024 |
| Priority date | — |
| Expiry date | Oct 8, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2475/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present disclosure provides a process. The process includes (A) providing at least 6 film layers, each film layer being a pearlized biaxially oriented polypropylene; (B) applying a solvent-less adhesive at a coat weight of 2.0 g/m2 to 3.5 g/m2 between each film layer; and (C) forming a laminate, the laminate having a thickness of at least 300 μm. The solvent-less adhesive contains (i) a polyol component including at least one polyol selected from a polyester polyol, a polyether polyol, and combinations thereof; and (ii) an isocyanate component including an isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from a polyester polyol, a polyether polyol, and combinations thereof. The present disclosure also provides a laminate formed by said process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.