Hewlett-packard Development Company, L.p.

Sandeep K Bangaru

Jason Swei

Bor-Jiunn Niu

Eric Lee Burch

Yubai Bi

Haigang Chen

Tienteh Chen

Kimberly Zargarian

Tao Chen

Steven L Webb

Lokendra Pal

Silke Courtenay

Xi Zeng

Kelly Ronk

Richard J Mcmanus

Yongzhong Wang

Fredrick Muya Makau

Greg S Smith

Glenn T Gentile

Lokendra Pai

Ryan C Terasaki

Yves-Michel Tricot

A post-printing treatment for printed media includes a wax suspended in water. Particles of the wax to lie upon at least an inkjet ink image on the printed media to facilitate abrasion resistance of the image.

Post-printing treatment

The present disclosure provides swellable pre-treatment compositions, printable media, and related methods. As such, a swellable pre-treatment coating for a print medium can include an evaporable solvent, a matrix, and a wax. The matrix can include from 10 wt % to 20 wt % of a fixer, from 25 wt % to 35 wt % of aluminum chlorohydrate, from 0.5 wt % to 10 wt % of a first binder, from 20 wt % to 30 wt % of a second cross-linkable binder, and from 1 wt % to 5 wt % of a cross-linker. The wax can be present at from 10 wt % to 20 wt %, The weight percentages of the matrix and the wax are based on a total amount present in the swellable pre-treatment coating after removal of the evaporable solvent.

Swellable pre-treatment coating

The present disclosure provides pre-treatment coatings, media substrates, and related methods. As such, a pre-treatment coating can include an evaporable solvent, a matrix, and a wax. The matrix can include a binder and a fixer, and the wax can include wax particles dispersed within the matrix. At least a portion of the wax particles can have a particle size that is greater than a thickness of the matrix when the pre-treatment coating is applied to a media substrate at a basis weight from 0.5 gsm to 20 gsm and the evaporable solvent removed.

Pre-treatment coating

A print medium includes a first layer on at least one of a first side and a second side of a substrate and a second layer. The first layer consists essentially of at least 80% by dry weight of one or more particulate inorganic pigments (PIPs). A combination of a particle size and a coat weight of the first layer on the substrate yields an effective pore size of the first layer in a range of about 0.008 to about 0.5 microns. For two or more PIPs in the first layer, the average particle size of one of the PIPs differs by no more than about 50% from the average particle size of another of the PIPs. The second layer is on top of the first layer and includes a particulate inorganic pigment (PIP) having an average particle size of about 0.1 to about 2 microns.

Print medium

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.

Media used in digital high speed inkjet web press printing

An inkjet recording medium includes a substrate, a base layer disposed on the substrate, and an ink receiving layer disposed on the base layer. The ink receiving layer includes cationically-modified fumed silica having nanoparticles of alumina and/or silica mixed therein. The alumina nanoparticles have an individual particle size ranging from about 15 nm to about 50 nm, and the silica nanoparticles have an individual particle size ranging from about 5 nm to about 45 nm.

Inkjet recording medium

A print medium suitable for inkjet web press printing is disclosed herein. The print medium includes a paper substrate and an ink-receiving layer coated onto at least one surface of the paper substrate. The ink-receiving layer includes: two different inorganic pigments with different particle sizes; a binder; a water-soluble metallic salt; and a colorant durability enhancer selected from the group consisting of boric acid, borax, sodium tetraborate, phenyl boronic acid, butyl boronic acid and combinations thereof.

Print medium for inkjet web press printing

An inkjet recording medium includes a substrate, a base layer, and a porous ink receiving layer. The base layer is established on at least one surface of the substrate, and the porous ink receiving layer is established on the base layer. The base layer includes calcined clay present in an amount ranging from about 25% to about 75% by dry weight.

Inkjet recording medium and method of making the same

A method of treating silica in an aqueous environment includes dispersing silica particulates in an aqueous environment to form an aqueous dispersion, reversing a net charge of a surface of the silica particulates from negative to positive using an inorganic treating agent to form surface-activated silica particulates, and contacting the surface-activated silica particulates with monoaminoorganosilane reagents to form reagent-modified and surface-activated silica particulates.

Porous silica coated inkjet recording material

The present invention is drawn to a media sheet for ink-jet printing and can comprise a media substrate and a coating composition applied to the media substrate to form an ink-receiving layer. The ink-receiving layer can include semi-metal oxide or metal oxide particulates, at least 5 wt % of a water soluble coating formulation additive, and a binder. The media sheet can also have a wash conductivity less than about 80 microsiemens/cm, said wash conductivity determined by measuring the conductivity of a 50 mL bath of deionized water after placing a 100 cmsample of the media sheet in the deionized water for 45 seconds at room temperature under agitation.

Ink-jet recording medium for dye- or pigment-based ink-jet inks

The present invention is drawn to a method of preparing a porous media substrate, comprising combining metal or semi-metal oxide particulates with a polymeric binder, wherein the metal or semi-metal oxide particulates are associated with at least one water soluble coating formulation additive. At least a portion of the water soluble coating formulation additive i) is in the form of unreacted additive, or ii) generates undesired electrolytes. Additional steps include removing at least a portion of the unreacted additive or undesired electrolytes, either before or after combining the metal or semi-metal oxide particulates with the polymeric binder, thereby forming a refined coating composition; and applying the refined coating composition to a media substrate to form an ink-receiving layer having a porous surface.

Growing community of inventors

San Diego, CA, United States of America

Sandeep K Bangaru