Thermoplastic film and laminated glass

Patent metadata

Field	Value
Publication number	US-11833784-B2
Application number	US-202017439223-A
Country	US
Kind code	B2
Filing date	Mar 19, 2020
Priority date	Mar 20, 2019
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A thermoplastic film 10 is a thermoplastic film comprising a light-emitting layer 11, wherein the light-emitting layer 11 comprises a thermoplastic resin and a light-emitting material that emits light by being irradiated with excitation light, and a change in yellowness of laminated glass obtained by bonding two sheets of clear glass in accordance with JIS R 3211 (1998) having a thickness of 2.5 mm with the thermoplastic film interposed therebetween after conducting a light resistance test for 2000 hours based on JIS R3205 2005 is 4 or less. The present invention provides a thermoplastic film comprising a light-emitting material, in which the emission intensity is unlikely to lower even when the thermoplastic film is exposed to ultraviolet rays for a long period of time.

First claim

The invention claimed is:

1. A thermoplastic film comprising a light-emitting layer,
the light-emitting layer comprising:
a thermoplastic resin; and
a light-emitting material that emits light by being irradiated with excitation light, and
wherein a change in yellowness of laminated glass obtained by bonding two sheets of clear glass in accordance with JIS R 3211(1998) having a thickness of 2.5 mm with the thermoplastic film interposed therebetween after conducting a light resistance test for 2000 hours based on JIS R3205 2005 is 4 or less.

2. The thermoplastic film according to claim 1 , wherein a content of the light-emitting material in the light-emitting layer is 0.01 parts by mass or more and 5 parts by mass or less based on 100 parts by mass of the thermoplastic resin.

3. The thermoplastic film according to claim 1 , comprising a visible light absorber.

4. The thermoplastic film according to claim 3 , further comprising an absorber-containing layer being a layer different from the light-emitting layer and comprising the visible light absorber.

5. The thermoplastic film according to claim 4 , wherein a content of the visible light absorber in the absorber-containing layer is 0.0001 parts by mass or more based on 100 parts by mass of the resin.

6. The thermoplastic film according to claim 4 , wherein an ultraviolet ray absorber is contained in at least any one of the light-emitting layer and the absorber-containing layer.

7. The thermoplastic film according to claim 6 , wherein a content of the ultraviolet ray absorber in the layer in which the ultraviolet ray absorber is contained is 0.01 parts by mass or more and 5 parts by mass or less based on 100 parts by mass of the resin.

8. The thermoplastic film according to any one of claim 4 , further comprising a barrier layer between the light-emitting layer and the absorber-containing layer.

9. The thermoplastic film according to claim 1 , comprising an ultraviolet ray absorber.

10. The thermoplastic film according to claim 1 , wherein a visible light transmittance Tv as measured for the laminated glass obtained by bonding two sheets of clear glass in accordance with JIS R 3211(1998) having a thickness of 2.5 mm with the thermoplastic film interposed therebetween is 70% or more.

11. The thermoplastic film according to claim 1 , being an interlayer film for laminated glass.

12. A laminated glass comprising:
an interlayer film for laminated glass, comprising the thermoplastic film according to claim 11 ; and
two glass plates, wherein
the interlayer film for laminated glass is disposed between the two glass plates.

13. An image display system comprising:
the laminated glass according to claim 12 ; and
a light source.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Oota Yuusuke
• Chou Kinryou
• Nakajima Daisuke
• Hamada Takanori

Classifications

• B32B17/10669 Primary

  Luminescent agents · CPC title

• B32B17/10036 Primary

  comprising two outer glass sheets · CPC title

• B32B17/10541

  comprising a light source or a light guide · CPC title

• B32B17/10633

  Infrared radiation absorbing or reflecting agents · CPC title

• B32B17/10678

  comprising UV absorbers or stabilizers, e.g. antioxidants · CPC title