Film

Described is a film comprising an electrically actuated liquid having a variable optical opacity under the influence of an electric field. The membrane includes spaced apart first and second substrates defining a first cavity therebetween in which some or all of the liquid is contained. The membrane also includes a liquid trap in fluid communication with the first cavity via a first opening. The liquid trap contains liquid that may flow from the first cavity via the first opening due to a reduction in the volume of the first cavity. The film may be included in a laminated glazing. The invention also describes a method of preparing a unit for a liquid, and such a unit may be part of a film with variable optical opacity. 本发明描述了一种包含电致动液体的膜，所述电致动液体在电场影响下具有可变光学不透明度。所述膜包括间隔开的第一基材和第二基材，在所述基材之间限定第一空腔，在所述第一空腔中容纳一些或全部的所述液体。所述膜还包括经由第一开口与所述第一空腔流体连通的液体捕集体。所述液体捕集体包含可能由于第一空腔的容积减小而从所述第一空腔经由第一开口流出的液体。所述膜可以包括在层叠窗玻璃中。本发明还描述了制备用于液体的单元的方法，并且这种单元可以是具有可变光学不透明度的膜的一部分。