Reflective imaging display material with biaxially oriented polyolefin sheet

• US 6,261,994 B1
• Filed: 09/17/1998
• Issued: 07/17/2001
• Est. Priority Date: 09/17/1998
• Status: Expired due to Fees

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Bourdelais, Robert P., Aylward, Peter T., Camp, Alphonse D.
• Primary Examiner(s): Hess, Bruce H.
• Application Number:
  US09/156,293
• Time in Patent Office: 1,034 Days
• Field of Search: 847/1, 428/195, 428/913, 428/914, 428/315.5, 428/910, 503/227
• US Class Current: 503/227
• CPC Class Codes: B32B 2307/518 bi-axially
• CPC Class Codes: B32B 2323/04 Polyethylene
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B41M 5/41 Base layers supports or substrates
• CPC Class Codes: B41M 5/42 Intermediate, backcoat, or covering layers B41M5/405 takes precedence; multilayer thermal transfer systems in general B41M5/38214
• CPC Class Codes: B41M 5/506 Intermediate layers
• CPC Class Codes: B41M 5/508 Supports
• CPC Class Codes: B41M 5/52 Macromolecular coatings
• CPC Class Codes: G03G 7/0026 being macromolecular
• CPC Class Codes: G03G 7/0066 Inorganic components thereof
• CPC Class Codes: G03G 7/008 being macromolecular
• CPC Class Codes: Y10S 428/91 Product with molecular orientation
• CPC Class Codes: Y10T 428/249978 Voids specified as micro

Abstract

The invention relates to an imaging element comprising a transparent polymer base, at least one layer of biaxially oriented polyolefin sheet and at least one image layer wherein said polymer sheet has a stiffness of between 20 and 100 millinewtons, and said biaxially oriented polyolefin sheet has a spectral transmission of less than 15%.

Claims

1. An imaging element comprising a transparent polymer sheet, at least one layer of biaxially oriented polyolefin sheet and at least one image layer wherein said polymer base has a stiffness of between 20 and 100 millinewtons, and said biaxially oriented polyolefin sheet has a spectral transmission of less than 15%.

2. The imaging element of claim 1 wherein said biaxially oriented polyolefin sheet is substantially opaque and contains white pigment.

3. The imaging element of claim 2 wherein said biaxially oriented polyolefin sheet further comprises microvoids.

4. The imaging element of claim 3 wherein said microvoids comprise at least one layer of said biaxially oriented polyolefin sheet and have at least 6 voids in the vertical direction at substantially every point of the biaxially oriented polyolefin sheet.

5. The imaging element of claim 3 wherein titanium dioxide is in a layer above a layer that contains said microvoids in said biaxially oriented polyolefin sheet.

6. The imaging element of claim 3 wherein said element has a reflection density of at least 85%.

7. The imaging element of claim 3 wherein said transparent polymer sheet is substantially free of pigment.

8. The imaging element of claim 2 wherein said biaxially oriented polyolefin sheet contains optical brightener.

9. The imaging element of claim 1 wherein said biaxially oriented polyolefin sheet has an integral layer of polyethylene on the top of said sheet.

10. The imaging element of claim 1 wherein said biaxially oriented polyolefin sheet comprises between 18 and 24 weight percent of titanium dioxide.

11. The imaging element of claim 1 wherein said element has a stiffness of between 60 and 500 millinewtons.

12. The element of claim 1 wherein said element comproses at least one electrophotographic receiving layer.

13. The element of claim 1 wherein said element comprises at least one printing ink receiving layer.

14. The element of claim 1 further comprising a dye receiving layer on the top of said biaxially oriented polyolefin sheet.

15. The element of claim 1 wherein there is no biaxially oriented polyolefin sheet on the bottom of said element.

16. The element of claim 1 wherein said transparent polymer sheet comprises polyester.

17. An imaging element comprising a transparent polymer sheet, at least one layer of biaxially oriented polyolefin sheet and at least one image layer wherein said polymer base has a stiffness of between 20 and 100 millinewtons, said biaxially oriented polyolefin sheet has a spectral transmission of less than 15% and said element comprises at least one thermal dye transfer receiving layer.

18. The imaging element of claim 17 wherein said biaxially oriented polyolefin sheet is substantially opaque and contains white pigment.

19. The imaging element of claim 18 wherein said biaxially oriented polyolefin sheet further comprises microvoids.

20. The imaging element of claim 19 wherein said biaxially oriented polyolefin sheet has an integral layer of polyethylene on the top of said sheet.

21. The imaging element of claim 18 wherein said element has a reflection density of at least 85%.

22. The imaging element of claim 19 wherein said biaxially oriented polyolefin sheet contains optical brightener.

23. The element of claim 18 wherein said dye transfer receiving layer is on the top of said biaxially oriented polyolefin sheet.

24. The element of claim 23 wherein there is no biaxially oriented polyolefin sheet on the bottom of said element.

25. An imaging element comprising a transparent polymer sheet, at least one layer of biaxially oriented polyolefin sheet and at least one image layer wherein said polymer base has a stiffness of between 20 and 100 millinewtons, said biaxially oriented polyolefin sheet has a spectral transmission of less than 15% and said element comprises at least one ink jet receiving layer.

26. The imaging element of claim 25 wherein said biaxially oriented polyolefin sheet is substantially opaque and contains white pigment.

27. The imaging element of claim 26 wherein said biaxially oriented polyolefin sheet further comprises microvoids.

28. The imaging element of claim 27 wherein said microvoids comprise at least one layer of said biaxially oriented polyolefin sheet and have at least 6 voids in the vertical direction at substantially every point of the biaxially oriented polyolefin sheet.

29. The imaging element of claim 27 wherein said biaxially oriented polyolefin sheet has an integral layer of polyethylene on the top of said sheet.

30. The element of claim 29 wherein said transparent polymer sheet comprises polyester.

31. The imaging element of claim 27 wherein titanium dioxide is in a layer above a layer that contains said microvoids in said biaxially oriented polyolefin sheet.

32. The imaging element of claim 27 wherein said biaxially oriented polyolefin sheet contains optical brightener.

33. The element of claim 27 further comprising a dye receiving layer on the top of said biaxially oriented polyolefin sheet.