OPTICAL FILMS INCORPORATING CYCLIC OLEFIN COPOLYMERS

• US 20080152837A1
• Filed: 02/28/2008
• Published: 06/26/2008
• Est. Priority Date: 10/29/2004
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Getschel, Joel A., Jones, Clinton L., Strobel, Joan M., Chien, Bert T., Strobel, Mark A., Bosl, Ellen R.
• Application Number:
  US12/039,522
• Publication Number:
  US 20080152837A1
• Time in Patent Office: Days
• US Class Current: 427/536
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• 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 2307/40 having particular optical properties light or UV resistant B32B2307/71
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/416 Reflective
• CPC Class Codes: B32B 2307/71 Resistive to light or to UV
• CPC Class Codes: B32B 2310/14 Corona, ionisation, electrical discharge, plasma treatment
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/16 specially treated, e.g. irradiated
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/325 comprising polycycloolefins
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 3/30 characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: B32B 38/0008 Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation heat treatment B32B38/0036
• CPC Class Codes: C08L 65/00 Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain C08L7/00 - C08L57/00, C08L61/00 take precedence; Compositions of derivatives of such polymers

Abstract

A norbornene-based cyclic olefin layer with a curable layer disposed thereon is described. The curable layer may additionally be imparted with a texture. The norbornene-based cyclic olefin films with curable layers can be incorporated into optical bodies which include an optical film, such as an oriented multilayer optical film. In addition, the invention includes a method of coating a curable layer onto a norbornene-based polymer layer or film without requiring a primer layer. Methods of making the norbornene-based cyclic olefin layer containing films are also disclosed.

Claims

1. A method of applying a curable layer to a norbornene-based cyclic olefin layer, comprising:

corona treating a norbornene-based cyclic olefin layer; and

applying a curable material to the corona-treated norbornene-based cyclic olefin layer, thereby forming a curable layer;

wherein the elapsed time between corona-treating the norbornene-based cyclic olefin layer and applying a curable layer is less than 75 seconds.

2. The method of claim 1, wherein the elapsed time is less than 30 seconds.

3. The method of claim 1, wherein the elapsed time is less than 2 seconds.

4. The method of claim 1, wherein the elapsed time is less than 1 second.

5. The method of claim 1, wherein the corona treating is performed in an ambient air atmosphere.

6. The method of claim 1, wherein the corona treating is performed in a nitrogen atmosphere.

7. The method of claim 1, wherein corona treating a norbornene-based cyclic olefin layer comprises feeding the norbornene-based cyclic olefin layer adjacent to a source electrode in ambient air environment.

8. The method of claim 1, wherein applying a curable layer comprises:

coating a curable material on the corona-treated solid norbornene-based co-polymer layer; and

curing the curable material.

9. The method of claim 8, wherein the elapsed time between coating the curable material and curing the curable material is less than 4 minutes.

10. The method of claim 8, wherein the elapsed time between coating the curable material and curing the curable material is less than 30 seconds.

11. The method of claim 8, further comprising imparting surface structures into the curable layer prior to curing.

12. The method of claim 1, the norbornene-based cyclic olefin film is disposed on an optical film, such that the curable layer becomes an outer layer of an optical body.

13. The method of claim 1, wherein the curable layer comprises a curable adhesive material;

and the method additionally comprising;

laminating the norbornene-based cyclic olefin layer and curable adhesive material to an optical film;

curing the curable adhesive layer, thereby forming an optical body.

14. A method of applying a curable layer to a norbornene-based cyclic olefin layer, the method comprising:

nitrogen corona treating the norbornene-based cyclic olefin layer; and

applying a curable material to the corona-treated norbornene-based cyclic olefin layer, thereby forming a curable layer;

wherein the elapsed time between corona-treating the norbornene-based cyclic olefin layer and applying a curable layer is less than an hour.

15. The method of claim 14, wherein the elapsed time is less than 30 minutes

16. The method of claim 14, wherein the elapsed time is less than 10 minutes.

17. The method of claim 14, wherein the elapsed time is less than 2 minutes.

18. The method of claim 14, wherein the elapsed time is less than 1 minute.

19. The method of claim 14, further comprising:

curing the curable material.