Film Roll Handling

Abstract

The present invention discloses a method of coating a film in a roll. The film was wound into a roll with gaps between the layers of the film in the roll. A fluid is forced through the roll such that the fluid deposits a coating on at least one side of the membrane.

Description

Background technique [0001] Thin glass films can be fabricated by one of several techniques. The most common methods are to use a fusion draw tower, where molten glass flows across two surfaces, meet in a line, and drawn into a sheet, or use a redraw process, in which a glass sheet is heated and drawn into a sheet. Such processes can produce glass films that are less than 100 microns thick and flexible enough to be wound into rolls. [0002] Glass film rolls can be used in the same process as plastic film rolls. For example, a common process applied to plastic films is vacuum coating, which can include physical vapor deposition (including chemical vapor deposition, sputtering, and evaporative coating). Although these coating methods are commonly used, they are also expensive. There are several coating methods where conventional roll handling is generally not economically feasible. These coating methods include chemical vapor deposition (CVD), low pressure CVD, and atomic l...

AI Technical Summary

Problems solved by technology

While conventional roll-to-roll processes such as batch vacuum roll coating can be used, the process can be very expensive or can result in poor coating properties

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