# US 9,751,286 B2 · Weather-resistant multilayer film

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- Number: US 9,751,286 B2
- Document ID: US9751286B2
- Status: Granted
- Kind: B2
- Application number: 14/129,990
- Filed: 2012-07-02
- Published: 2014-05-22
- Granted: 2017-09-05
- Earliest claimed: 2011-06-30
- Assignees: Jnc Corporation
- Applicants: Akiko Yoda; Kenya Ito; Koji Ohguma; Mikio Yamahiro
- Inventors: Akiko Yoda; Kenya Ito; Koji Ohguma; Mikio Yamahiro
- Web page: https://patentgrep.com/patent/US9751286B2

## CPC

- B32B 27/18: characterised by the use of special additives
- B32B 27/08: of synthetic resin
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/36: comprising polyesters
- B32B 2307/40: having particular optical properties
- B32B 2307/71: Resistive to light or to UV
- B32B 2307/712: Weather resistant
- B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays
- Y10T 428/24975: No layer or component greater than 5 mils thick
- Y10T 428/31797: Next to addition polymer from unsaturated monomers
- Y10T 428/31928: Ester, halide or nitrile of addition polymer
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Provided is a multi-layered weather-resistant multilayer film that exhibits good substrate adhesion, wherein curing problems are avoided, bleed-out is minimized, yellowing is reduced, and weather-resistance is improved. The weather-resistant multilayer film 10 is provided with the following: a transparent film-like substrate C; a UV-absorbing resin layer B laminated on the substrate C and containing a UV absorber; and a first cured resin layer A laminated on the UV-absorbing resin layer B. The first cured resin layer A has a thickness of 1.0 to 10 μm. The UV-absorbing resin layer B has a thickness of 0.5 to 5 μm. The UV-absorbing resin layer B has an absorption wavelength of 200 to 500 nm.

## Claims

### Claim 1

A weather-resistant multilayer film, comprising:
a transparent film-like substrate;
a UV-absorbing resin layer laminated on the substrate and containing an organic UV absorber n a proportion of 10 to 90 wt %, wherein the organic UV absorber is at least one selected from the group consisting of benzotriazoles, hydroxyphenyl triazines, benzophenones, salicylates, cyanoacrylates, triazines and dibenzoyl risorcinols;
a first cured resin layer laminated on the UV-absorbing resin layer, wherein the first cured resin layer does not contain an organic UV absorber; and
a second cured resin layer laminated on a side of the substrate opposite the UV-absorbing resin layer,
wherein the first cured resin layer has a thickness of 1.0 to 10 μm,
the UV-absorbing resin layer has a thickness of 0.5 to 5 μm,
the UV-absorbing resin layer has an absorption wavelength of 200 to 500 nm,
the first cured resin layer contains a UV-curable resin,
the transparent film-like substrate comprises polyethylene terephthalate (PET), and
the second cured resin layer has a surface free energy of 30 to 45 mN/m.

### Claim 2 (depends on 1)

The weather-resistant multilayer film according to claim 1,
wherein the second cured resin layer contains a UV-curable resin.

### Claim 3 (depends on 1)

The weather-resistant multilayer film according to claim 1,
wherein the UV-absorbing resin layer contains at least one resin selected from a group consisting of thermoplastic resins, thermosetting resins and active energy beam-curable resins, and
the resin has a weight-average molecular weight of 1,000 to 1,000,000.

### Claim 4 (depends on 1)

The weather-resistant multilayer film according to claim 1, wherein the UV-absorbing resin layer contains an active energy beam-curable resin having a weight-average molecular weight of 1,000 to 1,000,000.

### Claim 5 (depends on 1)

An image display device, comprising:
a weather-resistant multilayer film according to claim 1; and
an image panel having a screen on which the weather-resistant multilayer film is placed.