METHOD FOR PRODUCING A FILM FOR A COMPOSITE PANE, METHOD FOR PRODUCING THE COMPOSITE PANE, AND COMPOSITE PANE
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United States of America Patent
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May 20, 2021
app pub date -
Nov 17, 2020
filing date -
Nov 20, 2019
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Abstract
A method for producing a film for a composite pane of a motor vehicle, which film serves as an intermediate layer of the composite pane, comprising the following steps: providing a polyvinyl butyral (PVB) film base material or an ethylene vinyl acetate copolymer (EVA) film base material; providing at least one colorant; mixing the PVB or EVA film base material with the at least one colorant; liquefying the mixture of the PVB or EVA film base material and the at least one colorant; extruding the film from the liquefied mixture of the PVB or EVA film base material and the at least one colorant; treating the extruded film section by section by irradiating the film in order to form sections of different light transmissivity.
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