WAVELENGHTH CONVERSION FILM, AGRICULTURAL FILM, STRUCTURE AND COATING FILM FORMING COMPOSITION

• US 20100021739A1
• Filed: 10/02/2009
• Published: 01/28/2010
• Est. Priority Date: 04/06/2007
• Status: Active Grant

• Current Assignee: AGC, Inc.
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: SHIMOI, Yasuko, ARUGA, Hiroshi
• Granted Patent: US 8,501,313 B2
• Time in Patent Office: Days
• US Class Current: 428/411.100
• CPC Class Codes: A01G 9/1438 Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2264/10 Inorganic particles
• CPC Class Codes: B32B 2307/402 Coloured
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/422 Luminescent, fluorescent, phosphorescent
• CPC Class Codes: B32B 2307/712 Weather resistant
• CPC Class Codes: B32B 2410/00 Agriculture-related articles
• CPC Class Codes: B32B 2419/06 Roofs, roof membranes
• CPC Class Codes: B32B 2607/02 Wall papers, wall coverings
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: Y02A 40/25 Greenhouse technology, e.g. cooling systems therefor
• CPC Class Codes: Y10T 428/256 : Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/257 : Iron oxide or aluminum oxide
• CPC Class Codes: Y10T 428/259 : Silicic material
• CPC Class Codes: Y10T 428/31504 : Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/3154 : Of fluorinated addition polymer from unsaturated monomers

Abstract

To provide a wavelength conversion film which is capable of maintaining an optical wavelength converting function for a longer period of time than conventional wavelength conversion films.

A wavelength conversion film 10 containing an inorganic ultraviolet blocking material and a wavelength converting material, which consists of one or more layers, at least one of which is a base film layer 12 containing a thermoplastic resin.

Claims

1. A wavelength conversion film containing an inorganic ultraviolet blocking material and a wavelength converting material, and consisting of one or more layers, at least one of which is a base film layer containing a thermoplastic resin.

2. The wavelength conversion film according to claim 1, which consists of one base film layer, wherein the base film layer contains the above inorganic ultraviolet blocking material and the above wavelength converting material.

3. The wavelength conversion film according to claim 1, which consists of two or more layers, one of which contains the above inorganic ultraviolet blocking material and the above wavelength converting material.

4. The wavelength conversion film according to claim 1, which consists of two or more layers, one of which is an ultraviolet blocking layer containing the above inorganic ultraviolet blocking material and another of which is a wavelength converting layer containing the above wavelength converting material.

5. The wavelength conversion film according to claim 3, wherein the above base film layer consists of at least two layers.

6. The wavelength conversion film according to claim 3, wherein at least one layer is the above base film layer and at least another layer is a coating layer containing a resin.

7. The wavelength conversion film according to claim 6, wherein at least one coating layer contains a fluororesin as the above resin.

8. The wavelength conversion film according to claim 1, wherein at least one base film layer contains a thermoplastic fluororesin as the thermoplastic resin.

9. The wavelength conversion film according to claim 1, wherein the thermoplastic fluororesin is an ethylene/tetrafluoroethylene copolymer or polyvinylidene fluoride.

10. The wavelength conversion film according to claim 1, wherein the wavelength converting material is a fluorescent colorant or a phosphorescent pigment.

11. The wavelength conversion film according to claim 1, wherein the wavelength converting material is a fluorescent colorant covered with at least one selected from the group consisting of silica, alumina, zirconia and a cross-linked acrylic resin.

12. The wavelength conversion film according to claim 10, wherein the fluorescent colorant is a pi-conjugated organic colorant or an oxazine colorant.

13. The wavelength conversion film according to claim 1, wherein the inorganic ultraviolet blocking material is a metal oxide.

14. The wavelength conversion film according to claim 1, wherein the inorganic ultraviolet blocking material is a metal oxide covered with at least one selected from the group consisting of silica, zirconia and alumina.

15. The wavelength conversion film according to claim 13, wherein the metal oxide is at least one selected from the group consisting of cerium oxide, zinc oxide, titanium oxide and iron oxide.

16. An agricultural film made of the wavelength conversion film according to claim 1.

17. The agricultural film according to claim 16, which further has a droplet flowing layer formed on one or both sides of the wavelength conversion film.

19. A structure using the wavelength conversion film as defined in claim 4, as a roofing material or a wall covering material, characterized in that the wavelength conversion film is disposed so that the ultraviolet blocking layer is on the sunlight-incoming side.

18. A coating film forming composition comprising a wavelength converting material, an inorganic ultraviolet blocking material, a resin and a liquid medium.

20. A structure using a resin film containing a wavelength converting material and not containing an inorganic ultraviolet blocking material and a resin film containing an inorganic ultraviolet blocking material in pairs as a roofing material or a wall covering material, characterized in that the resin film containing the inorganic ultraviolet blocking material is disposed on the sunlight-incoming side.