Media used in digital high speed inkjet web press printing
AssigneeHewlett-Packard Development Company, L.P.
InventorsLokendra Pal, Jason Swei, Glenn T. Gentile, Sandeep K. Bangaru
Life of this patent
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Abstract
A media for digital high speed inkjet web press printing has a CD residual tensile energy absorption index greater than 300 J/Kg. The media includes a paper base having a MD/CD tensile stiffness index ratio of less than 2.0 and a tensile energy absorption index of greater than 500 J/Kg. The paper base includes a mixture of fibers having a softwood fiber to hardwood fiber ratio within a range of 3 to 7 to 7 to 1, an internal starch having a cationic starch to fiber ratio greater than 1.0%, and a filler within a range of about 1.0% to about 12.0% of paper base weight. The media further includes an image receiving coating on a side of the paper base.
Claims15
A media used in digital high speed inkjet web press printing, the media comprising:
- a paper base having a MD/CD tensile stiffness index ratio less than 2.0 and a tensile energy absorption index greater than 500 J/Kg, the paper base comprising:
- a mixture of fibers having a ratio of softwood to hardwood fibers within a range of 3 to 7 to 7 to 1;
- an internal starch having a ratio of cationic starch to fiber greater than 1.0%;
- and
- a filler within a range of about 1.0% to about 12.0% of paper base weight;
- and
- an image receiving layer on a side of the paper base, wherein the media has a CD residual tensile energy absorption index greater than 300 J/Kg.
A media used in high speed inkjet web press printing, the media comprising:
- a paper base having a tensile energy absorption index greater than 600 J/Kg comprising:
- a mixture of fibers having a ratio of softwood to hardwood fibers within a range of 3 to 7 to 1 to 1;
- an internal starch having a ratio of cationic starch to fiber within a range of greater than 1.0% to about 5.0%;
- a filler in an amount sufficient to achieve less than about 12.0% ash content;
- and
- one or more agents and additives in a combined amount within a range of about 0.0075% to about 9.0% of fiber weight;
- and
- an ink receiving layer on both sides of the paper base,
- wherein each of the media and the paper base has a MD/CD tensile stiffness index ratio of less than 2.0 and CD tensile energy absorption index greater than 800 J/Kg.
A method of making media for high speed inkjet web press printing, the method comprising:
- forming a pulp stock comprising a ratio of softwood fiber to hardwood fiber ranging from 3 to 7 to 7 to 1, an internal starch having cationic starch to fiber ratio greater than 1.0%, and a filler ranging from about 1.0% to about 12% by weight of the pulp stock;
- jetting the pulp stock onto a moving wire screen at a jet-to-wire speed ratio of about 1.0 to form an initial paper web;
- removing water from the initial paper web in a manner that prepares the paper web for surface sizing and coating, the paper web having a tensile energy absorption index greater than 500 J/Kg and an MD/CD tensile stiffness index ratio of less than 2.0;
- coating the paper web on one or both sides with an image receiving layer;
- and
- calendering the coated paper web to form the media, wherein the media has a CD residual tensile energy absorption index greater than 300 J/Kg.
Dependencies are inferred from the claim text.