Transfer paper for sublimation printing, method for producing the same, and method for decorating a substrate

Abstract

The invention relates to transfer paper for sublimation printing, a production method thereof and a method for decorating a printing stock. The present invention provides a transfer paper for sublimation printing having one or more alkaline earth metal salts and an organic cationic agent on at least one side wherein the side is free of other formulation or the amount of other formulation is less than 13 times the amount of the cationic agent, wherein other formula components comprise a binder, a pigment, a dispersing agent, a wetting agent, a thickening agent, an insoluble reagent, an adhesive, a brightener or a coloring agent. The invention also provides a method for producing the transfer paper, a method for printing the transfer paper and the printed transfer paper. Further, the invention provides a method for decorating a substrate.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202610057979.9 (22) Application Date 2018.01.10 (30) Priority Data 1750253 2017.01.12 FR (62) Divisional Application Data 201880006656.0 2018.01.10 (71) Applicant Auslon Company Address Helsinki, Finland (72) Inventor Thierry Mayard (74) Patent Agency Chengdu Fandian Intellectual Property Agency Co., Ltd. 51258 Patent Attorney Sun Xuanyu (51) Int.Cl. D21H 17 / 64 (2006.01) D21H 17 / 66 (2006.01) D21H 27 / 00 (2006.01) B41M 5 / 035(2006.01) B41M 5 / 382(2006.01) B41M 5 / 42(2006.01) B41M 5 / 00(2006.01) (54) Invention Title: Sublimation Printing Transfer Paper, Method for Manufacturing the Same, and Method for Decorating a Printed Substrate (57) Abstract: This invention relates to sublimation printing transfer paper, a method for manufacturing the same, and a method for decorating a printed substrate. The invention provides a sublimation printing transfer paper having one or more alkaline earth metal salts and an organic cationic reagent on at least one side, wherein no other formulation components are present on that side, or the amount of other formulation components is less than 13 times the amount of the cationic reagent, wherein the other formulation components are binders, pigments, dispersants, wetting agents, thickeners, insoluble reagents, adhesives, gloss agents, or colorants. The invention also provides a method for manufacturing the transfer paper, as well as a method for printing on the transfer paper and the printed transfer paper. Further, the invention provides a method for decorating a printed substrate. Claims (1 page), Description (5 pages), CN 121875124 A, 2026.04.17, CN 1 21 87 51 24 A 1. A transfer paper for sublimation printing, comprising one or more alkaline earth metal salts and an organic cationic reagent on at least one side, wherein the side has no other formulation components or the amount of such other formulation components is less than 13 times the amount of the cationic reagent, wherein the other formulation components are binders, pigments, dispersants, wetting agents, thickeners, insoluble reagents, adhesives, gloss agents, or colorants. 2. The transfer paper according to claim 1, wherein the alkaline earth metal salt is present on the at least one side in an amount equal to or greater than 0.2 g / m². 3. The transfer paper according to claim 1 or 2, wherein the at least one side containing the alkaline earth metal salt and the organic cationic reagent has no other surface treatment formulation components. 4. The transfer paper according to claim 1 or 2, wherein the transfer paper can be printed by inkjet printing.5. The transfer paper according to claim 1, wherein the alkaline earth metal salt is calcium dichloride or calcium nitrate. 6. The transfer paper according to claim 1, wherein the alkaline earth metal salt is magnesium sulfate or magnesium chloride. 7. The transfer paper according to claim 1 or 2, having a Bentsen air permeability equal to or greater than 100 ml / min according to standard ISO 5636-3. 8. The transfer paper according to claim 1 or 2, having a paper weight between 25 and 150 g / m². 9. A method for producing the transfer paper according to any one of claims 1 to 8, comprising depositing a composition comprising one or more alkaline earth metal salts or one or more compounds on at least one side of a fiber substrate, wherein the one or more compounds are formed in situ in the presence of one or more other compounds carried by the fiber substrate. 10. The method according to claim 9, wherein the fiber substrate is manufactured and the surface treatment is applied online or offline. 11. The method according to claim 9 or 10, wherein the amount of the composition deposited on the side of the fiber substrate is between 0.2 and 15 g / m² on a dry weight basis. 12. The method of claim 9 or 10, wherein the composition is applied using a sizing press, a film transfer press, or a coating system, or by means of a carving roller. 13. A printed transfer paper comprising the transfer paper according to any one of claims 1 to 8, and at least one print on the at least one side of the transfer paper containing the alkaline earth metal salt. 14. A method comprising printing sublimable ink on the at least one side of the transfer paper containing the alkaline earth metal salt according to any one of claims 1 to 8. 15. The method of claim 14, wherein the printing is performed by inkjet printing. 16. A method for decorating a substrate, comprising: providing the transfer paper according to any one of claims 1 to 8, printing sublimable ink on the at least one side of the transfer paper containing the alkaline earth metal salt, and transferring the printed ink to the substrate by sublimation. 17. A method for producing a fiber substrate, comprising introducing calcium carbonate in batches by coating through an acidic adhesive press, wherein one or more alkaline earth metal salts are formed during the production of transfer paper by an acid-base reaction of a compound deposited on the fiber substrate by a surface treatment with the calcium carbonate. Claims 1 / 1 page 2 CN 121875124 A Sublimation printing transfer paper and its production method and method for decorating the substrate

[0001] This application is a divisional application of the invention patent application filed on January 10, 2018, entitled "Sublimation printing transfer paper containing alkaline earth metal salts" with application number 2018800066560.Technical Field

[0002] This invention relates to transfer paper for sublimation printing, and more particularly to, but not limited to, transfer paper for inkjet printing. Background Art

[0003] Sublimation printing can use sublimable inks to create images on substrates such as metal, glass, plastic surfaces, or fabrics. Sublimable ink printing can be performed by printing the sublimable ink directly onto the final substrate or by indirect printing. In the case of indirect printing, the ink is first printed on paper, called transfer paper, and then the image printed on the transfer paper is transferred to the final substrate by pressing. Application US 2008 / 0229962 describes this printing process.

[0004] Applications EP 2965919 A1, WO00 / 06392, WO2008 / 006434, and WO2016 / 074671 disclose transfer paper for sublimation printing.

[0005] Specifically, application EP 2965919 A1 discloses a transfer paper comprising a reservoir having an outer surface configured to receive sublimable ink, and a barrier layer applied to an inner surface of the reservoir and configured to form a barrier for the transport of the sublimable ink. The reservoir may also contain a small portion of a cationic polymer to fix the sublimable ink pigment to the surface of the transfer paper.

[0006] Application WO00 / 06392 describes a transfer paper comprising a barrier layer, wherein the porosity is a maximum of 100 ml / min.

[0007] Application WO2008 / 006434 discloses a paper comprising a layer having a semi-synthetic thermoplastic polymer.

[0008] Application WO2016 / 074671 describes a paper comprising a layer having thermoplastic particles.

[0009] Sublimation transfer paper that can be printed by inkjet printing typically contains a barrier layer based on a hydrophilic polymer (such as carboxymethyl cellulose, starch, or polyvinyl alcohol), and is more or less filled with low surface area pigments, such as kaolin or calcium carbonate, or high surface area pigments, such as silica.

[0010] The presence of the hydrophilic polymer-based barrier layer results in a long drying time, limits the printing rate, and causes color mixing and bleeding, affecting print quality.

[0011] The above disadvantages can be mitigated by introducing fillers, but this is accompanied by increased formulation costs and / or limited sublimation transfer rates.

[0012] Therefore, there is a need that has not yet been met to obtain a sublimation transfer paper that can be printed by inkjet printing, has good printability and a limited drying time, a high transfer rate, and a low paper weight, particularly equal to or less than 50 g / m2. Summary of the Invention

[0013] The present invention aims to meet this need by having a sublimation transfer paper having one or more alkaline earth metal salts on at least one side.

[0014] The transfer paper according to the invention has good printability, especially due to one or more alkaline earth metal salts fixing the ink to the surface.Instruction manual, page 1 / 5, CN 121875124 A

[0015] Fixing ink pigments to the surface with one or more alkaline earth metal salts improves the optical density after transfer and limits bleeding. This improves the limitation.

[0016] One or more alkaline earth metal salts may be present on said side of the paper in an amount equal to or greater than 0.2 g / m2, particularly equal to or greater than 0.5 g / m2.

[0017] The transfer paper may comprise a fibrous substrate on which one or more alkaline earth metal salts are deposited by surface treatment, particularly as a single layer in a multilayer.

[0018] One or more alkaline earth metal salts may be present on one side of the transfer paper for receiving printing.

[0019] One or more alkaline earth metal salts are preferably selected from calcium salts or magnesium salts or mixtures thereof.

[0020] The alkaline earth metal salt may be calcium dichloride or calcium nitrate.

[0021] The alkaline earth metal salt may be magnesium sulfate or magnesium chloride.

[0022] The side of the transfer paper containing one or more alkaline earth metal salts may also contain one or more organic cationic reagents, particularly selected from epichlorohydrin polyamines, especially polyephichlorohydrin dimethylamine, polyethyleneimine and organic quaternary ammonium salts, preferably organic quaternary ammonium salts, and particularly the cationic reagent is polydiallyldimethylammonium chloride, also known as PolyDadmac. The latter can improve the transfer.

[0023] On the side containing the alkaline earth metal salt, the transfer paper may be free of other formulation components, such as binders, pigments, dispersants, wetting agents, thickeners, insoluble reagents, adhesives, brighteners or colorants, or the transfer paper may contain other formulation components on this side, such as binders, pigments, dispersants, wetting agents, thickeners, insoluble reagents, adhesives, brighteners or colorants, in g / m2, individually or preferably in total amounts equal to or less than 13 times the amount of one or more cationic reagents, for example equal to or less than 12 times, or 10 times, or 8 times or 5 times.

[0024] The absence or minimal presence of these components optimizes the ink fixation (color fixing) / ink drying trade-off.

[0025] The transfer paper may be free of the other formulation components described above on at least the side containing one or more alkaline earth metal salts, or may contain other formulation components on this side, whose individual or preferred total amount is equal to or less than 10 g / m2.

[0026] In the case where the transfer paper contains mineral fillers, these may be selected from calcium carbonate, kaolin, calcined kaolin, talc, TiO2, hydroxides, especially aluminum Al(OH)3 or magnesium hydroxides, sulfates, especially BaSO4 or CaSO4, natural or synthetic aluminum silicate, alumina, or mixtures thereof.

[0027] The mineral fillers block the surface ink. The presence of one or more alkaline earth metal salts according to the invention eliminates the need for mineral fillers, or at least limits their amount.

[0028] The transfer paper may be free of binder on at least the side containing one or more alkaline earth metal salts, or may contain one or more binders on this side in an amount equal to or less than 8 g / m².

[0029] The one or more binders may be selected from water-soluble binders, such as polyvinyl alcohol, starch, gelatin, soy or casein, or mixtures thereof.

[0030] The transfer paper is preferably printed by inkjet printing.

[0031] The transfer paper can also be printed by a rotary press.

[0032] The transfer paper preferably has a Bendtsen air permeability (according to standard ISO 5636-3) equal to or greater than 100 ml / min, particularly equal to or greater than 200 ml / min.

[0033] This air permeability gives the paper an open structure. This ensures that the ink applied to the transfer paper dries quickly. Therefore, by increasing the drying rate of the ink, the yield is increased compared to a lower air permeability.

[0034] The transfer paper preferably has a paper weight between 25 and 150 g / m², particularly between 30 and 75 g / m², or better equal to or less than 50 g / m². Specification 2 / 5 pages 4 CN 121875124 A

[0035] The transfer paper is typically for single use.

[0036] The invention also relates to a method for preparing transfer paper for sublimation printing, particularly as previously described, wherein a surface treatment is used to deposit one or more alkaline earth metal salts, or one or more compounds, on at least one side of a fibrous substrate, which in situ form one or more alkaline earth metal salts in the presence of one or more other compounds carried by the fibrous substrate.

[0037] The surface treatment can be a single layer or multiple layers.

[0038] The method according to the invention can include the production of the fibrous substrate.

[0039] The surface treatment can be performed online or offline.

[0040] One or more alkaline earth metal salts can be deposited or formed on one side of the fibrous substrate.

[0041] The fiber substrate may comprise natural and / or synthetic fibers, particularly long and short cellulose fibers.

[0042] A composition comprising one or more alkaline earth metal salts may be deposited on said side of the fiber substrate by surface treatment, and the amount of composition deposited on the fiber substrate may be between 0.2 and 15 g / m² on a dry weight basis, preferably between 0.5 and 8 g / m².

[0043] Surface treatment may be performed using a sizing press, a film transfer press, or a coating system, particularly curtain coating, doctor blade coating, air knife coating, crayon coating, or by engraving rollers.

[0044] The fiber substrate prior to treatment may comprise one or more compounds for forming one or more alkaline earth metal salts during the production of transfer paper.

[0045] One or more alkaline earth metal salts can be formed during the production of transfer paper by reacting a compound deposited on the fiber substrate by a surface treatment with other compounds introduced in batches during the production of the fiber substrate.

[0046] For example, one or more alkaline earth metal salts can be formed during the production of transfer paper by an acid-base reaction of calcium carbonate, which is introduced in batches during the production of the fiber substrate by coating through an acidic glue press.

[0047] The invention also relates to printed transfer paper for sublimation printing, comprising the transfer paper as defined above and at least one print on the side of the transfer paper containing one or more alkaline earth metal salts, particularly inkjet printing with at least one sublimable ink.

[0048] The invention also relates to a printing method for transfer paper for sublimation printing, wherein at least one ink is used, particularly by inkjet printing, to print on the side of the previously defined transfer paper containing one or more alkaline earth metal salts.

[0049] As a variant, printing can be performed by a rotary press.

[0050] For example, the printing may be four-color printing, wherein the ink cartridge contains primary color inks, specifically black, cyan, yellow, and magenta, and may contain synthetic colors (mixed colors). The inks are formulated from water-based sublimable pigments.

[0051] The invention also relates to a method of decorating a substrate, wherein a print on a transfer paper as described above is transferred to the substrate.

[0052] The substrate may be a metal, glass, plastic surface, or fabric, particularly a polyester fabric, preferably a predominantly polyester fabric. Detailed Description

[0053] Examples 1 to 6 The compositions described in the table below are each deposited by Mayer rods on one side of a fibrous substrate having the composition and properties described below. The fibrous substrate is treated with these compositions for transfer paper.

[0054] Pre-coating base paper instructions, page 3 / 5, CN 121875124 A. Fiber composition: 30% cork + 70% mixed short fiber. Basis weight = 60 g / m2. Cobb value 60s = 15 g / m2. Bentsen porosity = 1500 ml / min. Coating rules: Printing tests were conducted on paper using a SAWGRASS SG400 printing press according to the composition and coating in the table below, and the transfer was performed by pressing on polyester fabric at 200°C for one minute.

[0055] Black ink (SAWGRASS Sublijet Black) was deposited on one side of the fiber substrate treated with the composition. Thus, a pure black area was obtained. The transfer paper treated with the ink formed the printed transfer paper.

[0056] The optical density after transfer to polyester fabric was measured using an X-rite 500 spectrometer.

[0057] The proportions are expressed as dry weight.

[0058] The amounts of calcium carbonate, aluminum silicate, polyvinyl alcohol, sorbitol, PolyDADMAC and alkaline earth metal salts are expressed as percentages on a dry weight basis (% dry weight).

[0059]

[0060] The printed transfer paper described in Examples 1, 2, 3, 4 and 5 is paper according to the invention, which has a greater optical density than the printed transfer paper according to Example 6 which is not according to the invention.

[0061] Examples A, B and C The black ink in Examples 1, 2 and 3 was replaced in Examples A, B and C with the color of the pure red area formed by printing yellow and magenta (SAWGRASS Sublijet). The results are shown in the table below. Specification 4 / 5 pages 6 CN 121875124 A

[0062]

[0063] Calcium dichloride has excellent optical density and the color of the pure red area.Description Page 5 / 5 7 CN 121875124 A Abstract The present invention relates to a transfer paper for sublimation printing, a method for producing the same, and a method for decorating a substrate. The present invention provides a transfer paper for sublimation printing having one or more alkaline earth metal salts and an organic cationic reagent on at least one side, wherein said side contains no other formulation components, or the amount of other formulation components is less than 13 times the amount of the cationic reagent, and the other formulation components are binders, pigments, dispersants, wetting agents, thickeners, insoluble reagents, adhesives, brighteners or colorants. The present invention also provides a method for producing the transfer paper, as well as a method comprising printing on the transfer paper and the printed transfer paper. Furthermore, the present invention provides a method for decorating a substrate. .

Claims

1. A transfer paper for sublimation printing, having one or more alkaline earth metal salts and an organic cationic reagent on at least one side, wherein the side has no other formulation components or the amount of such other formulation components is less than 13 times the amount of the cationic reagent, wherein the other formulation components are binders, pigments, dispersants, wetting agents, thickeners, insoluble reagents, adhesives, gloss agents, or colorants.

2. The transfer paper according to claim 1, wherein, The alkaline earth metal salt has a concentration equal to or greater than 0.2 g / m 2 The amount exists on at least one side.

3. The transfer paper according to claim 1 or 2, wherein, The at least one side containing the alkaline earth metal salt and the organic cationic reagent has no other surface treatment formulation components.

4. The transfer paper according to claim 1 or 2, wherein, The transfer paper can be printed using inkjet printing.

5. The transfer paper according to claim 1, wherein, The alkaline earth metal salt is calcium chloride or calcium nitrate.

6. The transfer paper according to claim 1, wherein, The alkaline earth metal salt is magnesium sulfate or magnesium chloride.

7. The transfer paper according to claim 1 or 2, having a Bentson air permeability equal to or greater than 100 ml / min according to standard ISO 5636-3.

8. The transfer paper according to claim 1 or 2, having a paper weight of 25 and 150 g / m³. 2 between.

9. A method for producing transfer paper according to any one of claims 1 to 8, comprising depositing on at least one side of a fiber substrate a composition comprising one or more alkaline earth metal salts or one or more compounds, wherein the one or more compounds are formed in situ in the presence of one or more other compounds carried by the fiber substrate.

10. The method according to claim 9, wherein, The fiber substrate is manufactured and the surface treatment is applied online or offline.

11. The method according to claim 9 or 10, wherein, The amount of the composition deposited on the side of the fiber substrate is between 0.2 and 15 g / m² on a dry weight basis. 2 between.

12. The method according to claim 9 or 10, wherein, The composition is applied using a sizing press, film transfer press, or coating system, or by means of a sculpting roller.

13. A printed transfer paper comprising the transfer paper according to any one of claims 1 to 8, and at least one print on the at least one side of the transfer paper having the alkaline earth metal salt.

14. A method comprising printing a sublimable ink on at least one side of a transfer paper containing the alkaline earth metal salt according to any one of claims 1 to 8.

15. The method according to claim 14, wherein, The printing is performed using inkjet printing.

16. A method for decorating a printing substrate, comprising: A transfer paper is provided according to any one of claims 1 to 8, wherein a sublimable ink is printed on at least one side of the transfer paper having the alkaline earth metal salt, and the printed ink is transferred to the substrate by sublimation.

17. A method for producing a fiber substrate, comprising introducing calcium carbonate in batches via coating through an acidic adhesive press, wherein one or more alkaline earth metal salts are formed during the production of transfer paper by an acid-base reaction of a compound deposited on the fiber substrate by a surface treatment with the calcium carbonate.