Method for making a flexible louvered plastic film with protective coatings and film produced thereby

• US 4,766,023 A
• Filed: 01/16/1987
• Issued: 08/23/1988
• Est. Priority Date: 01/16/1987
• Status: Expired due to Term

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Lu, Shih-Lai
• Primary Examiner(s): Newsome, John H.
• Application Number:
  US07/003,723
• Time in Patent Office: 585 Days
• Field of Search: 427/44, 427/54.1, 156/272.2, 156/272.3, 428/120
• US Class Current: 428/120
• CPC Class Codes: B05D 3/06 by exposure to radiation B05D3/02 takes precedence ; plasma treatment B05D3/141
• CPC Class Codes: G02B 1/12 by surface treatment, e.g. by irradiation
• CPC Class Codes: G02B 5/00 Optical elements other than lenses light guides G02B6/00; optical logic elements G02F3/00
• CPC Class Codes: Y10T 428/24182 Inward from edge of web or sheet

Abstract

Louvered plastic film can be more easily handled and installed by coating at least one surface with a solvent-free monomer composition and exposing the coating to ultraviolet radiation to polymerize the composition.

Claims

1. A method of producing a composite structure including a louvered plastic film, said method comprising the steps of:

coating a first major surface of a louvered plastic film with a composition in a fluid state which polymerizes to a transparent hard state upon exposure to a selected type of radiation, said composition bonding strongly to said louvered plastic film upon polymerization;

bringing a first liner film which is transmissive to said selected type of radiation into contact with said coating of composition, said liner film being selected to release easily from said composition after polymerization of said composition; and

exposing said composite to sufficient radiation of said selected type to polymerize said composition to a hard state.

2. The method of claim 1 wherein the selected type of radiation is ultra-violet light.

3. The method of claim 1 further comprising the step of removing said liner film.

4. The method of claim 1 wherein the surface of said liner film which contacts said composition is optically smooth.

5. The method of claim 4 wherein the selected type of radiation is ultra-violet light.

6. The method of claim 5 further comprising the step of removing said liner film.

7. The method of claim 1 wherein the surface of said liner film which contacts said composition is so as to produce a matte finish on said composition when said composition is polymerized.

8. The method of claim 7 wherein the selected type of radiation is ultra-violet light.

9. The method of claim 8 further comprising the step of removing said liner film.

10. The method of claim 1 further comprising the steps of:

coating a second major surface of said louvered plastic film with said composition;

bringing a second liner film which is transparent to said selected type of radiation into contact with said second coating of said composition; and

exposing said composite to sufficient radiation of said selected type to polymerize said second coating of said composition to a hard state.

11. The method of claim 10 wherein the selected type of radiation is ultra-violet light.

12. The method of claim 10 further comprising the step of removing both of said liner films.

13. The method of claim 10 wherein the surfaces of both of said liner films which contact said solvent-free composition are optically smooth.

14. The method of claim 13 wherein the selected type of radiation is ultra-violet light.

15. The method of claim 14 further comprising the step of removing both of said liner films.

16. A composite louvered plastic film product comprising

a louvered plastic film having first and second major surfaces;

and

a first layer of hard radiation polymerized, optically clear composition adhered to said first major surface.

17. The composite of claim 16 wherein said first layer of polymerized composition has an optically smooth surface.

18. The composite of claim 16 wherein said first layer of polymerized composition has a surface with a matte finish.

19. The composite of claim 16 wherein said first layer of polymerized composition has a thickness in the range of 0.0001 inches to 0.002 inches.

20. The composite of claim 19 wherein said first layer of polymerized composition has a thickness in the range of 0.0005 inches to 0.002 inches.

21. The composite of claim 16 further comprising a second layer of hard, radiation polymerized, optically clear composition adhered to said second major surface.

22. The composite of claim 21 wherein each of said layers of polymerized composition has an optically smooth surface.

23. The composite of claim 21 wherein said first layer of polymerized composition has a surface with a matte finish.

24. The composite of claim 21 wherein each of said layers of polymerized composition has a thickness in the range of 0.0001 inches to 0.002 inches.

25. The composite of claim 24 wherein each of said layers of polymerized composition has a thickness in the range of 0.0005 inches and 0.002 inches.