# US 2014/0198166 A1 · Low grammage recording medium

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- Number: US 2014/0198166 A1
- Document ID: US20140198166A1
- Status: Published application
- Kind: A1
- Application number: 13/739,594
- Filed: 2013-01-11
- Published: 2014-07-17
- Earliest claimed: 2013-01-11
- Assignees: Hewlett-Packard Development Company, L.P.
- Applicants: Hewlett-Packard Development Company, L.P.
- Inventors: Gracy Apprisiani Wingkono; John L. Stoffel; Thomas Roger Oswald
- Web page: https://patentgrep.com/patent/US20140198166A1

## CPC

- B41M 5/508: {Supports}
- D21H 11/00: Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H 17/16: Addition products thereof with hydrocarbons
- D21H 17/17: Ketenes, e.g. ketene dimers
- D21H 17/28: Starch
- D21H 17/63: Inorganic compounds
- D21H 17/66: Salts, e.g. alums
- D21H 17/67: Water-insoluble compounds, e.g. fillers, pigments
- D21H 17/675: {Oxides, hydroxides or carbonates}
- D21H 21/16: Sizing or water-repelling agents
- D21H 23/56: Rolls (D21H23/38 takes precedence)
- D21H 25/02: Chemical or biochemical treatment (D21H25/18 takes precedence)
- B41M 5/5218: {characterised by inorganic additives, e.g. pigments, clays}
- B41M 5/5236: {characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose}
- B41M 5/5254: {characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers}
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR

## Abstract

The present disclosure provides low grammage recording media, and associated methods and systems. In one example, a low grammage recording medium can comprise a raw base paper having a basis weight of 65 gsm or less, the raw base paper comprising wood fiber and 2 wt % to 10 wt % filler including calcium carbonate. A surface treatment solution is applied to the raw base paper and comprises a surface sizing agent and 3 wt % to 15 wt % calcium carbonate.

## Claims

### Claim 1

A low grammage recording medium, comprising:
a raw base paper having a basis weight of 65 gsm or less, the raw base paper, comprising:
a filler in an amount at from 2 wt % to 10 wt %, the filler including calcium carbonate; and
wood fiber; and
a surface treatment solution applied to the raw base paper, the surface treatment solution, comprising:
calcium carbonate in an amount at from 3 wt % to 15 wt %, and
a surface sizing agent.

### Claim 2 (depends on 1)

The low grammage recording medium of claim 1, the filler also including titanium dioxide.

### Claim 3 (depends on 1)

The low grammage recording medium of claim 1, wherein the surface sizing agent is present in the surface treatment solution in an amount at from 0.1 wt % to 80 wt %.

### Claim 4 (depends on 1)

The low grammage recording medium of claim 1, wherein the surface sizing agent is selected from the group of: starches and starch derivatives; carboxymethylcellulose (CMC); methyl cellulose; alginates; waxes; wax emulsions; alkylketene dimer (AKD); alkyl succinic anhydride (ASA); alkenyl ketene dimer emulsion (AnKD); emulsions of ASA or AKD with cationic starch; ASA incorporating alum; polyvinyl alcohol; gelatin; acrylamide polymers; acrylic polymers or copolymers; vinyl acetate latex; polyesters; vinylidene chloride latex; styrene-butadiene; acrylonitrile-butadiene copolymers; styrene acrylic copolymers and copolymers; and mixtures thereof.

### Claim 5 (depends on 1)

The low grammage recording medium of claim 1, wherein the surface sizing agent is a starch or starch derivative.

### Claim 6 (depends on 1)

The low grammage recording medium of claim 1, wherein the surface treatment solution comprises titanium dioxide in an amount at from 1 wt % to 8 wt %.

### Claim 7 (depends on 1)

The low grammage recording medium of claim 1, wherein the surface treatment solution further comprises a metal salt in an amount at from 0.1 wt % to 30 wt %.

### Claim 8 (depends on 1)

The low grammage recording medium of claim 1, wherein the low grammage recording medium has an MD stiffness of at least 0.16 and an opacity of at least 78.

### Claim 9 (depends on 1)

The low grammage recording medium of claim 1, wherein the low grammage recording medium has an opacity of at least 82.

### Claim 10

A method of making a low grammage recording medium, comprising applying a surface treatment solution onto a raw base paper, the raw base paper comprising wood fiber and from 2 wt % to 10 wt % of a filler which includes calcium carbonate, the surface treatment solution comprising a surface sizing agent and from 3 wt % to 15 wt % calcium carbonate, wherein the raw base paper has a basis weight of 65 gsm or less.

### Claim 11 (depends on 10)

The method of claim 10, wherein the filler further includes titanium dioxide and the surface sizing agent is a starch or starch derivative.

### Claim 12 (depends on 10)

The method of claim 10, wherein the surface treatment solution comprises titanium dioxide in an amount at from 1 wt % to 8 wt % and a metal salt in an amount at from 0.1 wt % to 30 wt %.

### Claim 13 (depends on 10)

The method of claim 10, wherein the low grammage recording medium has an MD stiffness of at least 0.16.

### Claim 14 (depends on 10)

The method of claim 10, wherein the low grammage recording medium has an opacity of at least 82.

### Claim 15

A system for inkjet printing, comprising:
an inkjet ink loaded in an inkjet cartridge reservoir; and
a low grammage recording medium, the low grammage recording medium, comprising:
a filler in an amount at from 2 wt % to 10 wt %, the filler including calcium carbonate; and
wood fiber; and
a surface treatment solution applied to the raw base paper, the surface treatment solution comprising:
calcium carbonate in an amount at from 3 wt % to 15 wt %, and
a surface sizing agent.