# US 2018/0022135 A1 · Inkjet printing method

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- Number: US 2018/0022135 A1
- Document ID: US20180022135A1
- Status: Published application
- Kind: A1
- Application number: 15/551,724
- Filed: 2016-03-09
- Published: 2018-01-25
- Earliest claimed: 2015-03-13
- Assignees: Omya International AG
- Applicants: Omya International AG
- Inventors: Roger Bollström; Joachim Schoelkopf; Patrick A.C. Gane
- Web page: https://patentgrep.com/patent/US20180022135A1

## CPC

- B41M 5/0017: {Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying}
- B41M 3/001: {using chemical colour-formers or chemical reactions, e.g. leuco dyes or acids}
- B41M 5/0047: {by ink-jet printing}
- B41M 5/502: {characterised by structural details, e.g. multilayer materials (supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42)}
- B41M 5/52: Macromolecular coatings
- B41M 5/5218: {characterised by inorganic additives, e.g. pigments, clays}
- B41M 5/0058: {on metals and oxidised metal surfaces}
- B41M 5/0064: {on plastics, horn, rubber, or other organic polymers}
- B41M 5/007: {on glass, ceramic, tiles, concrete, stones, etc.}
- B41M 5/0076: {on wooden surfaces, leather, linoleum, skin, or flowers}
- 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)

## Abstract

The present invention relates to a method for manufacturing an inkjet-printed substrate, wherein a liquid treatment composition comprising at least one acid and an ink are deposited onto a substrate simultaneously or consecutively by inkjet printing, wherein the substrate comprises a coating layer comprising a salifiable alkaline or alkaline earth compound.

## Claims

### Claim 1

A method for manufacturing an inkjet-printed substrate comprising the following steps:
a) providing a substrate, wherein the substrate comprises on at least one side a coating layer comprising a salifiable alkaline or alkaline earth compound,
b) providing a liquid treatment composition comprising an acid,
c) providing an ink,
d) depositing the liquid treatment composition onto the coating layer by inkjet printing to form a first pattern, and
e) depositing the ink onto the coating layer by inkjet printing to form a second pattern, wherein the liquid treatment composition and the ink are deposited simultaneously or consecutively and the first pattern and the second pattern overlap at least partially.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first pattern and the second pattern overlap by at least 50%, preferably at least 75%, more preferably at least 90%, even more preferably at least 95%, and most preferably at least 99%.

### Claim 3 (depends on 1)

The method of claim 1, wherein the substrate of step a) is prepared by
i) providing a substrate,
ii) applying a coating composition comprising a salifiable alkaline or alkaline earth compound on at least one side of the substrate to form a coating layer, and
iii) drying the coating layer.

### Claim 4 (depends on 1)

The method of claim 1, wherein the substrate of step a) is selected from the group consisting of paper, cardboard, containerboard, plastic, non-wovens, cellophane, textile, wood, metal, glass, mica plate, marble, calcite, nitrocellulose, natural stone, composite stone, brick, concrete, and laminates or composites thereof, preferably paper, cardboard, containerboard, or plastic.

### Claim 5 (depends on 1)

The method of claim 1, wherein the salifiable alkaline or alkaline earth compound is an alkaline or alkaline earth oxide, an alkaline or alkaline earth hydroxide, an alkaline or alkaline earth alkoxide, an alkaline or alkaline earth methylcarbonate, an alkaline or alkaline earth hydroxycarbonate, an alkaline or alkaline earth bicarbonate, an alkaline or alkaline earth carbonate, or a mixtures thereof, preferably the salifiable alkaline or alkaline earth compound is an alkaline or alkaline earth carbonate being preferably selected from lithium carbonate, sodium carbonate, potassium carbonate, magnesium carbonate, calcium magnesium carbonate, calcium carbonate, or mixtures thereof, more preferably the salifiable alkaline or alkaline earth compound is calcium carbonate, and most preferably the salifiable alkaline or alkaline earth compound is a ground calcium carbonate, a precipitated calcium carbonate and/or a surface-treated calcium carbonate.

### Claim 6 (depends on 1)

The method of claim 1, wherein the salifiable alkaline or alkaline earth compound is in form of particles having a weight median particle size d50 from 15 nm to 200 μm, preferably from 20 nm to 100 μm, more preferably from 50 nm to 50 μm, and most preferably from 100 nm to 2 μm.

### Claim 7 (depends on 1)

The method of claim 1, wherein the acid is selected from the group consisting of hydrochloric acid, sulphuric acid, sulphurous acid, phosphoric acid, citric acid, oxalic acid, acetic acid, formic acid, sulphamic acid, tartaric acid, phytic acid, boric acid, succinic acid, suberic acid, benzoic acid, adipic acid, pimelic acid, azelaic acid, sebaic acid, isocitric acid, aconitic acid, propane-1,2,3-tricarboxylic acid, trimesic acid, glycolic acid, lactic acid, mandelic acid, acidic organosulfur compounds, acidic organophosphorus compounds, and mixtures thereof, preferably the acid is selected from the group consisting of hydrochloric acid, sulphuric acid, sulphurous acid, phosphoric acid, oxalic acid, boric acid, suberic acid, succinic acid, sulphamic acid, tartaric acid, and mixtures thereof, more preferably the acid is selected from the group consisting of sulphuric acid, phosphoric acid, boric acid, suberic acid, sulphamic acid, tartaric acid, and mixtures thereof, and most preferably the acid is phosphoric acid and/or sulphuric acid.

### Claim 8 (depends on 1)

The method of claim 1, wherein the liquid treatment composition comprises the acid in an amount from 0.1 to 100 wt.-%, based on the total weight of the liquid treatment composition, preferably in an amount from 1 to 80 wt.-%, more preferably in an amount from 5 to 60 wt.-%, and most preferably in an amount from 10 to 50 wt.-%.

### Claim 9 (depends on 1)

The method of claim 1, wherein the liquid treatment composition is deposited onto the coating layer in form of an one-dimensional bar code, a two-dimensional bar code, a three-dimensional bar code, a security mark, a number, a letter, an alphanumerical symbol, a text, a logo, an image, a shape, or a design.

### Claim 10 (depends on 1)

An inkjet-printed substrate obtainable by the method according to claim 1.

### Claim 11

A method for manufacturing a substrate with improved inkjet-printability comprising the following steps:
A) providing a substrate, wherein the substrate comprises on at least one side a coating layer comprising a salifiable alkaline or alkaline earth compound,
B) providing a liquid treatment composition comprising an acid, and
C) depositing the liquid treatment composition onto the coating layer by inkjet printing to form a pattern with improved inkjet printability.

### Claim 12 (depends on 11)

A substrate with improved inkjet-printability obtainable by the method according to claim 11.

### Claim 13 (depends on 12)

Use of a substrate with improved inkjet-printability according to claim 12 in inkjet printing applications.

### Claim 14 (depends on 1)

An inkjet formulation for use in the method according to claim 1 comprising a liquid treatment composition comprising an acid and an ink.

### Claim 15 (depends on 10)

Use of the inkjet-printed substrate according to claim 10 in packaging applications, in decorative applications, in artistic applications, or in visual applications, preferably as wall paper, packaging, gift wrap paper, advertisement paper or poster, business card, manual, warranty sheet or card.