Controlling cross-web layer profile of a multilayer polymer film
US9393729B2 · kind B2 · utility
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5References
21Claims
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Key dates
| Filing date | Jan 10, 2011 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is disclosed that includes forming a plurality of polymer layers via a plurality of slots, wherein the plurality of layers are combined to generate a multilayer polymer flow stream; and controlling heat flow to the plurality of slots in conjunction with the formation of the plurality of polymer layers. The multilayer polymer flow stream may be used to generate a multilayer film. In some embodiments, the cross-web layer thickness profile may be controlled by controlling heat flow to the plurality of slots that form the plurality of polymer layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.