Packaging composite material comprising polarizing films and packaging comprising said material
US11685587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2018 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Apr 10, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W90/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed in the present invention is a packaging composite material comprising polarizing films, the packaging composite material comprising: a polarizing layer, comprising two or more layers of polarizing film, wherein polarization directions of at least two layers of polarizing film have an included angle which is not 0°. The packaging composite material of the present invention has a simple structure, strong light-blocking properties, a high light-blocking rate, and a broad-spectrum light-blocking effect. Also disclosed in the present invention are the use of the packaging composite material in packaging, and the use of the packaging composite material in a label. When used as packaging or a label, the packaging composite material can extend the shelf life of products which need to be stored in the dark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.