Transmissive reflector including nacreous, pressure sensitive adhesive layer

• US 4,436,377 A
• Filed: 11/06/1980
• Issued: 03/13/1984
• Est. Priority Date: 11/06/1980
• Status: Expired due to Term

• Current Assignee: Morgan Adhesives Company (Amcor Plc)
• Original Assignee: Morgan Adhesives Company (Amcor Plc)
• Inventors: Miller, James A.
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): Lewis, David
• Application Number:
  US06/204,581
• Time in Patent Office: 1,223 Days
• Field of Search: 350/339, 350/345, 350/338, 350/105, 350/431, 252/583, 252/584, 526/268, 283/91, 283/92, 283/97, 283/108, 283/111, 428/204, 428/363, 428/386, 428/387, 428/1
• US Class Current: 349/114
• CPC Class Codes: G02B 5/0242 by means of dispersed particles
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02B 5/0284 used in reflection
• CPC Class Codes: G02B 5/08 Mirrors vehicle mirrors involving special optical features B60R1/08
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 2203/09 transflective
• CPC Class Codes: Y10S 359/90 Methods
• CPC Class Codes: Y10T 428/24876 Intermediate layer contains particulate material [e.g., pigment, etc.]
• CPC Class Codes: Y10T 428/2911 Mica flake
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]

Abstract

A transmissive reflector which both reflects light and lets light pass therethrough. The transmissive reflector comprises a nacreous pigment in combination with a transparent adhesive. The nacreous pigment and the transparent adhesive can be separately coated on a clear or transparent substrate or combined as a blend or mixture thereon. The transmissive reflector imparts lustre or a pearlescent effect to light as well as diffuses the light and, thus, enhances the appearance of various articles such as transparencies, rear projection screens, projection television, and the like. Also, when utilized as a reflector as for a background, the reflected light has a lustre imparted thereto and thus any article displayed is distinctly set forth, as for example, a liquid crystal readout, and the like.

Claims

1. A transmissive reflector, comprising;

a nacreous pigment and a transparent adhesive, the amount of said nacreous pigment being from 15 to 30 parts by weight based upon 100 parts by weight of said adhesive, said nacreous pigment having a particle size of from 2 to 50 microns, said nacreous pigment being in combination with said adhesive, said combination being a mixture.

2. A transmissive reflector according to claim 1, wherein said nacreous pigment-adhesive combination has a thickness of from about 0.2 to about 10 mil.

3. A transmissive reflector according to claim 2, wherein said thickness is from about 0.5 to about 5 mil and wherein said particle size ranges from about 2 to about 40 microns.

4. A transmissive reflector according to claim 3, wherein said nacreous pigment is a metallic oxide coated mica platelet.

5. A transmissive reflector according to claim 1, 2, or 4, including a transparent substrate, said adhesive-nacreous pigment combination adhered to at least one side of said substrate.

6. A transmissive reflector according to claim 5, wherein said adhesive is a pressure sensitive adhesive.

7. A transmissive reflector according to claim 5, including a liquid crystal display, said pigment-adhesive mixture layer adhered to said liquid crystal display so that a lusture background is produced.

8. A transmissive reflector according to claim 7, wherein said liquid crystal display has

a liquid crystal medium and a glass layer, said glass layer residing on either side of said liquid crystal medium,

a pressure sensitive adhesive, said pressure sensitive adhesive located on the outside of each glass layer, and

a polarized film, said polarized film located on the outside of each said adhesive layer, the transmissive reflector located on one side of said polarized film.

9. A transmissive reflector according to claim 5, including a transparent article mounted on said transmissive reflector so that a lustrified article is produced.

10. A transmissive reflector according to claim 5, including an article, said article adhered to said pigment-adhesive layer so that a lustre background is produced.

11. A process for making a transmissive reflector, comprising the steps of:

obtaining a nacreous pigment,

obtaining a transparent adhesive, and

mixing said nacreous pigment and said adhesive, wherein the amount of said nacreous pigment in said mixture ranges from 15 to 30 parts by weight based upon 100 parts by weight of said adhesive, and wherein the particle size of said pigment ranges from 2 to 50 microns, and wherein the thickness of said pigment-adhesive layer ranges from 0.5 to 5 mils.

12. A process according to claim 11, including applying said nacreous pigment-adhesive coating to at least one side of a transparent substrate, the thickness of said coating ranging from about 0.2 to about 10 mils.

13. A process according to claim 12, including applying an article to said nacreous pigment-adhesive coating so that a lustrified background is formed with respect to said article.

15. A process according to claim 11, 12, 13 or 14, wherein said adhesive is a pressure sensitive adhesive.

16. A transmissive reflector for imparting pearlescence to light striking said transmissive reflector, comprising:

a coating, said coating containing a mixture of a pearlescent imparting pigment and a transparent adhesive, the amount of said pigment in said coating ranging from 15 to 30 parts by weight based upon 100 parts by weight of said adhesive, and wherein the particle size of said pigment ranges from 2 to 50 microns, and wherein the thickness of said coating ranges from 0.5 to 5 mils.

14. A process according to claim 19, including applying a transparent article to said nacreous pigment-adhesive coating so that said article is lustrified.

17. A transmissive reflector according to claim 16, wherein said adhesive-pigment coating ranges from about 0.20 mil to about 10 mil in thickness.

18. A transmissive reflector according to claim 17, including a transparent substrate, said coating adhered to at least one side of said substrate.

19. A transmissive reflector according to claim 18, wherein said adhesive is a pressure sensitive adhesive.

20. A transmissive reflector according to claims 17, 18, or 19, including an article, said article adhered to said coating so that said coating provides a pearlescent background.

21. A transmissive reflector according to claim 20, wherein said article is transmissive so that said article is pearlescent.