Method of stripping films which are stuck together without damage
US10802391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2017 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Apr 23, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1911
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of stripping films which are stuck together without damage is disclosed. The whole reel of films which are stuck together is placed in a sealing device with outlet valves. Liquid nitrogen is added at a bottom of the sealing device. The films are stripped off by a flow of gas through gaps between the layers of the films while the vaporization of liquid nitrogen. The present invention adopts a natural force of liquid nitrogen vaporization to strip the films, which does not compromise the PH value, the dimensional performance and the mechanical performance of the films. The films are stripped off without damage. The conventional method of stripping the films causes the fragile film to break off or the image layer with a decreased combing power to detach. The present invention has the advantages of simple operation, low cost and good promotion value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.