Matte surface film

• US 20040023052A1
• Filed: 07/31/2002
• Published: 02/05/2004
• Est. Priority Date: 07/31/2002
• Status: Abandoned Application

• Current Assignee: Exxonmobil Oil Corporation (Exxon Mobil Corporation)
• Original Assignee: Exxonmobil Oil Corporation (Exxon Mobil Corporation)
• Inventors: Ambroise, Benoit
• Application Number:
  US10/210,346
• Publication Number:
  US 20040023052A1
• Time in Patent Office: Days
• US Class Current: 428/515
• CPC Class Codes: B32B 2250/242 All polymers belonging to those covered by group B32B27/32
• CPC Class Codes: B32B 2307/408 Matt, dull surface
• CPC Class Codes: B32B 2323/043 HDPE, i.e. high density polyethylene
• CPC Class Codes: B32B 2323/10 Polypropylene
• 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 37/153 at least one layer is extruded and immediately laminated while in semi-molten state
• CPC Class Codes: B32B 7/027 Thermal properties
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 428/31909 Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31938 Polymer of monoethylenically unsaturated hydrocarbon

Abstract

A multi-layered polymeric film comprising a core layer comprising a polyolefin, and a first skin layer comprising a low melting point polyolefin and a matte producing agent, and a method for producing same.

Claims

1. A multi-layered polymeric film comprising:

(a) a core layer comprising a polyolefin, wherein the core layer comprises an interior of the film;

(b) a first skin layer comprising a low melting point polyolefin and a matte producing agent, wherein the first skin layer is engaged with and exterior to the core layer.

2. The film of claim 1 wherein the core layer comprises a material selected from the group consisting of polypropylene and polyethylene.

3. The film of claim 1 wherein the matte producing agent is selected from the group consisting of aluminum oxide, aluminum sulfate, barium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate (kaolin clay), magnesium silicate (talc), silicon dioxide, titanium dioxide, and mixtures thereof.

4. The film of claim 1 wherein the matte producing agent comprises calcium carbonate.

5. The film of claim 1 wherein the core layer comprises high density polyethylene.

6. The film of claim 1 wherein the core layer comprises isotactic polypropylene.

7. The film of claim 1 wherein a melting point of the core layer is at least about 5°

C. higher than a melting point of the low melting point polyolefin.

8. The film of claim 1 wherein the film is oriented while the low melting point polyolefin is at a temperature equal to or greater than the melting point of the low melting point polyolefin.

9. The film of claim 8 further comprising:

an additional outer layer engaged with an exterior side of the first skin layer.

10. The film of claim 1 wherein the multi-layered polymeric film is substantially non-opaque having a haze of equal to or less than about 50%.

11. A multi-layered polymeric film comprising:

(a) a core layer comprising a polyolefin, wherein the core layer comprises an interior of the film;

(b) a first transition layer comprising a low melting point polyolefin and a matte producing agent, wherein the first transition layer is exterior to the core layer;

(c) a first skin layer comprising a polyolefin, wherein the first skin layer is exterior to the core layer and the first transition layer.

12. The film of claim 11 wherein the polyolefin of the first skin layer is a low melting point polyolefin.

13. The film of claim 11 further comprising:

a second skin layer comprising a low melting point polyolefin, wherein the second skin layer is exterior to the core layer on a side of the core layer opposite the first transition layer and the first skin layer.

14. The film of claim 11 further comprising:

a second transition layer comprising a low melting point polyolefin, wherein the second transition layer is exterior to the core layer on a side of the core layer opposite the first transition layer and the first skin layer; and

a second skin layer comprising a low melting point polyolefin, wherein the second skin layer is exterior to the core layer and the second transition layer.

15. The film of claim 11 wherein the core layer comprises a material selected from the group consisting of polypropylene and polyethylene.

16. The film of claim 15 wherein the core layer comprises a material selected from the group consisting of isotactic polypropylene and HDPE.

17. The film of claim 11 wherein the matte producing agent of the first transition layer is selected from the group consisting of aluminum oxide, aluminum sulfate, barium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate (kaolin clay), magnesium silicate (talc), silicon dioxide, titanium dioxide, and mixtures thereof.

18. The film of claim 11 wherein the matte producing agent of the first transition layer comprises calcium carbonate.

19. The film of claim 11 wherein the low melting point polyolefin has a melting point at least about 5°

C. less than the melting point of the polyolefin of the core layer.

20. The film of claim 13 wherein the second skin layer comprises a low melting point polyolefin and a matte producing agent.

21. The film of claim 13 wherein the second transition layer comprises a low melting point polyolefin and a matte producing agent.

22. A multi-layered polymeric film comprising:

(a) a core layer comprising a polyolefin, wherein the core layer comprises an interior of the film;

(b) a first transition layer comprising polyolefin agent, wherein the first transition layer is exterior to the core layer;

(c) a first skin layer comprising a low melting point polyolefin, wherein the first skin layer is exterior to the core layer and the first transition layer.

23. A method of producing a multi-layered film comprising the steps of:

(a) coextruding a skin layer comprising a low melting point polyolefin and a matte producing agent, with a core layer comprising a polyolefin; and

(b) orienting the coextruded skin layer and core layer in the machine direction at an elevated temperature, wherein the elevated temperature is at least about the melting point of the low melting point polyolefin.

24. The film of claim 23 further comprising:

orienting the skin layer and the core layer in the transverse direction at an elevated temperature, wherein the elevated temperature is at least about the melting point of the low melting point polyolefin.

25. A multi-layered polymeric film comprising:

(a) a core layer comprising a polyolefin having a first side and a second side;

(b) a first transition layer comprising a low melting point polyolefin and a matte producing agent having a first side and a second side wherein the second side of the first transition layer is adjacent to the first side of the core layer;

(c) a first skin layer comprising a polyolefin having a first side and a second side wherein the second side of the first skin layer is adjacent to the first side of the first transition layer.

26. The film of claim 25 further comprising a second skin layer comprising a polyolefin having a first side and a second side wherein the first side of the second skin layer is adjacent to the second side of the core layer.

27. The film of claim 25 further comprising a second transition layer comprising a polyolefin wherein the second transition layer has a first side and a second side wherein the first side of the second transition layer is adjacent to the second side of the core layer, and further comprising a second skin layer comprising a polyolefin wherein the second skin layer has a first side and a second side wherein the first side of the second skin layer is adjacent to the second side of the second transition layer.

28. The film of claim 26 wherein the second skin layer comprises a low melting point polyolefin and a matte producing agent.

29. The film of claim 26 wherein the second transition layer comprises a low melting point polyolefin and a matte producing agent.