Extruded toner receiver layer for electrophotography
View Patent ↗The invention relates to a receiver sheet for electrophotography comprising a base material having thereon at least one toner receiver layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured T g of said at least one receiver layer is less than 5° C.
1. A receiver sheet for electrophotography comprising a base material having thereon at least one toner receiver layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured T g of said at least one receiver layer is less than 5° C.
2. The receiver sheet of claim 1 wherein said at least one said toner receiver layer further comprises a silicate material.
3. The receiver sheet of claim 2 wherein said silicate material comprises between 3 and 10% by weight of said receiver layer.
4. The receiver sheet of claim 2 wherein said silicate material comprises talc with a median particle size of less than 3 micron.
5. The receiver sheet of claim 1 wherein said ester containing polymer comprises polyester.
6. The receiver sheet of claim 5 wherein the polyester is a branched polyester.
7. The receiver sheet of claim 1 wherein said ester containing polymer comprises acrylic.
8. The receiver sheet of claim 1 wherein said ester containing polymer comprises a copolymer of polyethylene and acrylic.
9. The receiver sheet of claim 1 wherein said polyolefin comprises polyethylene.
10. The receiver sheet of claim 1 wherein said base comprises paper.
11. The receiver sheet of claim 1 wherein said at least one toner receiver layer is applied directly to said base.
12. The receiver sheet of claim 1 wherein a T g of said receiver layer is between −100° C. and +5° C.
13. The receiver sheet of claim 1 wherein a T g of said receiver layer is between −10° C. and −100° C.
14. The receiver sheet of claim 1 wherein said at least one toner receiver layer further comprises opacifier.
15. The receiver sheet of claim 1 wherein said at least one toner receiver layer further comprises colorants.
16. The receiver sheet of claim 1 wherein said at least one toner receiver layer has a thickness of between 6 and 25 micrometers.
17. The receiver sheet of claim 1 wherein said at least one toner receiver layer has a ratio of viscosities of the said polyolefin and polyamide containing polymer that is less than the ratio of volume fraction of said polyolefin and volume fraction of said polyamide containing polymer.
18. The receiver sheet of claim 5 wherein said at least one toner receiver layer has a ratio of viscosities of the said polyolefin and polyester containing polymer that is less than the ratio of volume fraction of said polyolefin and volume fraction of said polyester containing polymer.
19. The receiver sheet of claim 6 wherein said at least one toner receiver layer is not tacky to touch.
20. The receiver sheet of claim 1 wherein said ester containing polymer comprises between 5 and 30 weight % of the total weight of the toner receiver layer.
21. The receiver sheet of claim 1 wherein said amide containing polymer comprises between 5 and 30 weight % of the total weight of the toner receiver layer.
22. The receiver sheet of claim 1 wherein said mixture comprises polyolefin and a polyolefin copolymer.
23. The receiver sheet of claim 1 wherein said mixture comprises polyolefin and amide containing polymers.
24. A method of forming receiver sheet for electrophotography, comprising providing a base bringing a thermoplastic solvent free polymer mixture comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured T g of said at least one receiver layer is less than 5° C., into contact with said base with application of heat and pressure, and cooling the receiver base to recover a receiver sheet according to claim 1 .
25. The method of claim 24 wherein said polymer mixture is heated to between 260° C. and 343.3° C. prior to bringing into contact with said base.
26. The method of claim 24 wherein said thermoplastic polymer mixture has a melt strength greater than or equal to 2 cN at 200° C.
27. The method of claim 24 wherein said base comprises paper.
28. The method of claim 27 wherein said thermoplastic polymer mixture is brought directly into contact with said paper without use of a tie layer.
29. The method of claim 24 wherein said mixture comprises polyolefin and a polyolefin copolymer.
30. The method of claim 24 wherein said mixture comprises polyolefin and amide containing polymers.