Multilayer film with electrically switchable optical properties

Patent metadata

Field	Value
Publication number	US-2016138328-A1
Application number	US-201414783772-A
Country	US
Kind code	A1
Filing date	Jan 15, 2014
Priority date	Apr 10, 2013
Publication date	May 19, 2016
Grant date	—

Abstract

Multilayer film ( 1 ) with electrically switchable optical properties, comprising, arranged sheet-wise in order, at least: —a first carrier film ( 5 ), —a first electrically conductive layer ( 3 ), —an active layer ( 2 ), —a second electrically conductive layer ( 4 ) and —a second carrier film ( 6 ), wherein —the multilayer film ( 1 ) has at least two circumferential separating lines ( 16 ), which separate an insulated edge region ( 18 ) from the first electrically conductive layer ( 3 ) and the second electrically conductive layer ( 4 ), —the first carrier film ( 5 ) and the second carrier film ( 6 ) are welded in at least a part of the insulated edge region ( 18 ) to form a sealed region ( 7 ), and —the separating lines ( 16 ) have a width of 10 μm to 500 μm.

First claim

1 . A multilayer film with electrically switchable optical properties, comprising, arranged sheet-wise in order, at least:
a first carrier film, a first electrically conductive layer, an active layer, a second electrically conductive layer, and a second carrier film,
wherein
the multilayer film has at least two circumferential separating lines, which separate an insulated edge region from the first electrically conductive layer and the second electrically conductive layer.

2 . The multilayer film according to claim 1 , wherein the at least two circumferential separating lines are introduced with a first laser through at least one of the first carrier film and the second carrier film into the first electrically conductive layer and the second electrically conductive layer and have a width of 10 μm to 500 μm.

3 . The multilayer film according to claim 1 , wherein the first carrier film and the second carrier film are welded by heating at least one of the first carrier film and the second carrier film in at least a part of the insulated edge region by means of a second laser to form a sealed region.

4 . The multilayer film according to claim 3 , wherein a width of the sealed region is 500 μm to 1 cm.

5 . The multilayer film according to claim 1 , wherein at least one of the first carrier film and the second carrier film contain at least one thermoplastic polymer.

6 . The multilayer film according to claim 1 , wherein the first electrically conductive layer and the second electrically conductive layer contain at least one of a metal, a metal alloy, and a transparent conducting oxide.

7 . The multilayer film according to claim 1 , wherein the active layer is one of a SPD, a PDLC, an electrochromic, or an electroluminescent functional element.

8 . A composite pane with a multilayer film according to claim 1 , wherein the multilayer film is arranged between at least one first pane and one second pane.

9 . A method for producing a multilayer film with electrically switchable optical properties, the method comprising:
the directing radiation of a first laser through at least one of a first carrier film and a second carrier film and onto at least one of a first electrically conductive layer and a second electrically conductive layer, wherein the first carrier film and the second carrier film are part of a multilayer structure that includes, in the following order, the first carrier film, the first electrically conductive layer, an active layer, the second electrically conductive layer, and the second carrier film, moving radiation of the first laser over the at least one of the first electrically conductive layer and the second electrically conductive layer, thereby creating at least one circumferential separating line, sealing the first carrier film and the second carrier film to form an insulated edge region, wherein the insulated edge region includes a sealed region bounding the first electrically conductive layer, the active layer, and the second electrically conductive layer, and wherein the at least one circumferential separating line separates the first electrically conductive layer and the second electrically conductive layer from the sealed region.

10 . The method according to claim 9 , wherein sealing the first carrier film and the second carrier film comprises welding the first carrier film and the second carrier film together by means of the radiation of a second laser.

11 . The method according to claim 9 , wherein the first electrically conductive layer and the second electrically conductive layer have, at a wavelength of the radiation of the first laser, an absorption greater than or equal to 0.1%, wherein the first carrier film and the second carrier film have, at the wavelength of the radiation, an absorption less than or equal to 15%, and wherein a ratio of an absorption of the first and second electrically conductive layers to the absorption of the first and second carrier layers, at the wavelength of the radiation, is greater than or equal to 0.5.

12 . The method according to claim 11 , wherein the wavelength of the radiation of the first laser when creating the at least one circumferential separating line is from 150 nm to 1200 nm.

13 . The method according to claim 9 , wherein moving the radiation of the first laser comprises moving the radiation at a speed of 100 mm/s to 10000 mm/s.

14 . The method according to claim 9 , wherein the first laser is operated in pulse mode having pulse lengths less than or equal to 50 ns and a pulse repetition frequency from 1 kHz to 200 kHz.

15 . (canceled)

16 . The multilayer film according to claim 1 , wherein the first carrier film and the second carrier film are sealed together in the insulated edge region, forming a sealing region bounding the first electrically conductive layer, the active layer, and the second electrically conductive layer, and wherein the at least two circumferential separating lines separate the first electrically conductive layer and the second electrically conductive layer from the sealed region.

17 . The multilayer film of claim 1 , wherein the at least two circumferential separating lines each have a width of 10 μm to 500 μm.

18 . The multilayer film of claim 1 , wherein the first carrier film and the second carrier film are each glass panes.

19 . The method of claim 9 , wherein the first carrier film and the second carrier film are each glass panes.

Assignees

• Cardinal Ig Co

Inventors

• Behmke Michael
• Andreau-Wiedenmaier Annabelle
• Letocart Philippe

Classifications

• E06B9/24 Primary

  Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) · CPC title

• G02F1/172

  based on a suspension of orientable dipolar particles, e.g. suspended particles displays · CPC title

• G02F1/1343

  Electrodes {(reflective electrodes G02F1/133553)} · CPC title

• G02F1/1334

  based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals · CPC title

• E06B2009/2464

  featuring transparency control by applying voltage, e.g. LCD, electrochromic panels · CPC title