The present invention concerns a print medium for inkjet printing and a method of producing such a print medium. In particular, the present invention is directed to a print medium comprising a base layer having a first side and a reverse side, an absorptive layer being in contact with the first side
The present invention concerns a print medium for inkjet printing and a method of producing such a print medium. In particular, the present invention is directed to a print medium comprising a base layer having a first side and a reverse side, an absorptive layer being in contact with the first side of the base layer, and a topcoat being in contact with the absorptive layer.
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1. A print medium comprising: a) a base layer having a first side and a reverse side;b) an absorptive layer being in contact with the first side of the base layer, wherein the adsorptive layer comprises a pigment; andc) a topcoat being in contact with the absorptive layer, wherein the topcoat has a
1. A print medium comprising: a) a base layer having a first side and a reverse side;b) an absorptive layer being in contact with the first side of the base layer, wherein the adsorptive layer comprises a pigment; andc) a topcoat being in contact with the absorptive layer, wherein the topcoat has a permeability of greater than 5.0×10−18 m2, and comprises a pigment having a d50 value in a range from 0.01 to 1.0 μm. 2. The print medium of claim 1, wherein the base layer is a wood free paper or a wood containing paper. 3. The print medium of claim 2, having a basis weight from 30 to 300 g/m2. 4. The print medium of claim 1, wherein the absorptive layer has an absorption rate from 1×10−5 ms−0.5 to 1×10−3 ms−0.5 and/or a volume uptake from 30 to 95% by volume relative to the total volume of the absorptive layer. 5. The print medium of claim 1, wherein the pigment of the absorptive layer, when in the form of a compacted bed, has an absorption rate from 1×10−5 ms−0.5 to 1×10−3 ms−0.5 and/or a volume uptake from 35 to 95% by volume relative to the total volume of the pigment. 6. The print medium of claim 1, wherein the pigment of the absorptive layer has a specific surface area of greater than 25 m2/g. 7. The print medium of claim 1, wherein the pigment of the absorptive layer has a specific surface area of from 25 to 100 m2/g. 8. The print medium of claim 1, wherein the pigment of the absorptive layer has a specific surface area of from 30 to 50 m2/g. 9. The print medium of claim 1, wherein the pigment of the absorptive layer has a specific surface area of greater than 25 m2/g, a d50 value from 0.3 to 3 μm and a porosity, when in form of a compacted bed, of greater or equal to 35%. 10. The print medium of claim 1, wherein the pigment of the absorptive layer is a calcium carbonate, a plastic pigment, a polystyrene-based plastic pigment, titanium dioxide, dolomite, calcined clay, or any mixture thereof, or a mixture of one or more of calcium carbonate, titanium dioxide, dolomite, or calcined clay with one or more of talc, non-calcined clay or bentonite. 11. The print medium of claim 1, wherein the pigment of the absorptive layer is a calcium carbonate. 12. The print medium of claim 1, wherein the pigment of the absorptive layer is a modified calcium carbonate and/or a precipitated calcium carbonate. 13. The print medium of claim 11, wherein the calcium carbonate is in acicular, prismatic, spheral, or rhombohedral form or any combination thereof. 14. The print medium of claim 1, wherein the absorptive layer further comprises a binder in an amount of 1 to 50 wt.-% based on the total weight of the pigment. 15. The print medium of claim 14, wherein the binder is starch, polyvinyl alcohol, styrene-butadiene latex, styrene-acrylate latex, or polyvinyl acetate latex or any mixture thereof. 16. The print medium of claim 1, wherein the absorptive layer has a coat weight in a range from 3 to 50 g/m2. 17. The print medium of claim 1, wherein the absorptive layer has a coat weight in a range from 3 to 40 g/m2. 18. The print medium of claim 1, wherein the absorptive layer has a coat weight in a range from 6 to 20 g/m2. 19. The print medium of claim 1, wherein the pigment of the topcoat is a calcium carbonate, a plastic pigment, a polystyrene-based plastic pigment, titanium dioxide, dolomite, calcined clay, or any mixture thereof, or a mixture of one or more of calcium carbonate, titanium dioxide, dolomite, or calcined clay with one or more of talc, non-calcined clay or bentonite. 20. The print medium of claim 1, wherein the pigment of the topcoat is a calcium carbonate. 21. The print medium of claim 1, wherein the pigment of the absorptive layer comprises ground calcium carbonate and/or a precipitated calcium carbonate. 22. The print medium of claim 1, wherein the topcoat further contains a binder in an amount of 0.5 to 50 wt.-% based on the total weight of the pigment. 23. The print medium of claim 22, wherein the binder is selected from starch, polyvinyl alcohol, styrene-butadiene latex, styrene-acrylate latex, or polyvinyl acetate latex or any mixture thereof. 24. The print medium of claim 1, wherein the topcoat further comprises a rheology modifier in an amount of less than 1 wt.-% based on the total weight of the pigment. 25. The print medium of claim 1, wherein the topcoat has a coat weight in a range from 1 to 50 g/m2. 26. The print medium of claim 1, wherein the topcoat has a coat weight in a range from 3 to 40 g/m2. 27. The print medium of claim 1, wherein the topcoat has a coat weight in a range from 6 to 20 g/m2. 28. The print medium of claim 1, wherein the print medium further comprises a second absorptive layer being in contact with the reverse side of the base layer, and a second topcoat being in contact with the second absorptive layer.
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이 특허에 인용된 특허 (5)
Tsukisaka Ryogo (Takarazuka JPX) Kondo Satoshi (Nishinomiya JPX) Kaneguchi Toshio (Kobe JPX) Deguchi Takashi (Nishinomiya JPX), Calcium carbonate, calcium carbonate pigment, process for preparing same, coating composition for information recording.
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