Method for manufacturing a blown film web as well as a blown film line
US10773450B2 · kind B2 · utility
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12References
10Claims
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Assignee
Inventor
Key dates
| Filing date | Oct 15, 2014 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Aug 13, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/001
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a method for manufacturing blown film web on a blown film line, film is heated above the takeoff device and then treated mechanically. This allows the film to be brought from initial heat to an easy-to-process temperature level with little energy. A horizontally oriented treatment roll path is provided between the takeoff and a reversing device is arranged above the takeoff. In both aspects, controlling is performed to achieve a uniform film gauge after stretching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.