# US 2014/0193592 A1 · Transparent laminated film and method for producing the same

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- Number: US 2014/0193592 A1
- Document ID: US20140193592A1
- Status: Published application
- Kind: A1
- Application number: 14/183,139
- Filed: 2014-02-18
- Published: 2014-07-10
- Earliest claimed: 2008-12-25
- Assignees: Tokai Rubber Industries, Ltd.
- Applicants: Tokai Rubber Industries, Ltd.
- Inventors: Tetsuya TAKEUCHI; Tetsuji NARASAKI; Hiroki INAGAKI; Masataka INUZUKA; Yoshihiro TOKUNAGA
- Web page: https://patentgrep.com/patent/US20140193592A1

## CPC

- C23C 28/04: only coatings of inorganic non-metallic material
- C23C 28/321: {with at least one metal alloy layer}
- C23C 28/322: {only coatings of metal elements only}
- H05K 9/0096: {for television displays, e.g. plasma display panel}
- Y10T 428/269: including synthetic resin or polymer layer or component
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A transparent laminated film is provided with which it is possible to inhibit peeling of thin film layers, even with long-term exposure to sunlight during use and exposure to UV rays during quality evaluation. The film has a thin film layer obtained by lamination of multiple thin films on at least one side of a transparent polymer film. This thin film layer has metal oxide thin films formed by a sol-gel process using light energy during sol-gel hardening and post-oxidation thin films formed by post-oxidation of at least one thin film selected from metal thin film, alloy thin film, and partially oxidized metal oxide thin film.

## Claims

### Claim 1

A transparent laminated film production method comprising:
a lamination process forming, on at least one surface of a transparent polymer film, a thin film layer containing a metal oxide thin film formed by a sol-gel method using light energy during sol-gel hardening, and at least one kind of thin film selected from a metal thin film, an alloy thin film, and a partially oxidized metal oxide thin film; and
a post-oxidation process forming a post-oxidation thin film by post-oxidizing the at least one kind of thin film selected from the metal thin film, the alloy thin film, and the partially oxidized metal oxide thin film, the post-oxidation thin film being contained in the thin film layer.

### Claim 2 (depends on 1)

The transparent laminated film production method according to claim 1, wherein the post-oxidation process is performed by post-oxidizing the transparent polymer film having the thin film layer.

### Claim 3 (depends on 2)

The transparent laminated film production method according to claim 2, wherein the transparent polymer film having the thin film layer is wound in a roll-like form.

### Claim 4 (depends on 1)

The transparent laminated film production method according to claim 1, wherein the post-oxidation is performed via a heat treatment.

### Claim 5 (depends on 4)

The transparent laminated film production method according to claim 4, wherein a heating temperature during the heat treatment is equal to or below a softening temperature of a material constituting the transparent polymer film having the thin film layer.

### Claim 6 (depends on 5)

The transparent laminated film production method according to claim 5, wherein the heating temperature is 30° C.-60° C.

### Claim 7 (depends on 1)

The transparent laminated film production method according to claim 1, wherein:
the metal thin film is a metal Ti thin film;
the alloy thin film is a silver alloy thin film; and
the partially oxidized metal oxide thin film is a partially oxidized titanium oxide thin film.

### Claim 8 (depends on 7)

The transparent laminated film production method according to claim 7, wherein the silver alloy contains at least one kind of element selected from Cu, Cr, Fe, Ni, Pb, Si, Ti, V, Y, and Zr, as secondary alloy elements.

### Claim 9 (depends on 7)

The transparent laminated film production method according to claim 7, wherein the silver alloy is one of an Ag—Cu alloy and an Ag—Ti alloy.