Primer composition for surface-printed flexible packaging, ink set, surface-printed matter, and inkjet printing method

Abstract

It is an object of the present invention to provide a primer composition for surface-printed flexible packaging, an ink set, a surface-printed matter, and an inkjet printing method, which can impart excellent solid uniformity, bleeding resistance, abrasion resistance, alcohol resistance, and heat resistance to a coating film when an inkjet image is formed after applying the primer composition. Provided is a primer composition for surface-printed flexible packaging comprising an acryl-based resin emulsion emulsified with a polymer, N-oleoyl sarcosine, a hydrazine-based compound having at least two or more hydrazine residues in a molecule, and wax, wherein a content of the acryl-based resin emulsion is 3 to 40% by mass in terms of solid content, and wherein a glass transition temperature of the acryl-based resin emulsion is-40 to 30 C.

Claims

1. A primer composition for surface-printed flexible packaging, comprising an acryl-based resin emulsion emulsified with a polymer, N-oleoyl sarcosine, a hydrazine-based compound having at least two or more hydrazine residues in a molecule, and wax, wherein a content of the acryl-based resin emulsion is 3 to 40% by mass in terms of solid content, and wherein a glass transition temperature of the acryl-based resin emulsion is 40 to 30 C.

2. The primer composition for surface-printed flexible packaging of claim 1, further comprising a white pigment.

3. The primer composition for surface-printed flexible packaging of claim 1 or 2, further comprising a chlorinated polyolefin.

4. An ink set, including the primer composition for surface-printed flexible packaging of any one of claims 1 to 3 and an aqueous inkjet ink composition, wherein the aqueous inkjet ink composition comprises a pigment, a water-insoluble resin, and wax.

5. A surface-printed matter to which the primer composition for surface-printed flexible packaging and the aqueous inkjet ink composition of claim 4 are applied.

6. An inkjet printing method, including a printing step of surface-printing the primer composition for surface-printed flexible packaging and the aqueous inkjet ink composition of claim 4 on a base material.

Description

EXAMPLE

[0094] Hereinafter, the present invention will be described in more detail with reference to Examples. The present invention is not limited to these Examples. Besides, unless otherwise specified, % means % by mass, and part means part by mass.

[0095] Raw materials used and a preparation method are shown below.

<Aqueous Resin Varnish>

[0096] 20 parts by mass of an acrylic acid/n-butyl acrylate/benzyl methacrylate/styrene copolymer having a glass transition temperature at 40 C., a weight-average molecular weight of 30,000, and an acid value of 185 mgKOH/g was dissolved in a mixed solution of 2.5 parts by mass of potassium hydroxide and 77.5 parts by mass of water to obtain an aqueous resin varnish having a solid content of 20%.

<Preparation of Aqueous Black Ink Base A>

[0097] 60.3 parts by mass of water was added to 23.7 parts by mass of the aqueous resin varnish and mixed to prepare a resin varnish for pigment dispersion. To this varnish, 16 parts by mass of carbon black (Printex 90, manufactured by Orion Engineered Carbons S.A.) was further added, stirred and mixed, and then the mixture was kneaded with a wet type circulation mill to prepare an aqueous black ink base.

<Preparation of Aqueous Black Ink Base B (Cross-Linked Base)>

[0098] 2.1 parts by mass of Epolite 1600 (bifunctional epoxy compound, manufactured by Kyoeisha Chemical Co., Ltd.) and 22.9 parts by mass of water were added to 75 parts by mass of the aqueous black ink base A described above and heated at 60 C. for 24 hours to obtain an aqueous black ink base B.

<Preparation of Aqueous Yellow Ink Base>

[0099] 64.3 parts by mass of water was added to 23.7 parts by mass of the aqueous resin varnish and mixed to prepare a resin varnish for pigment dispersion. To this varnish, 12 parts by mass of a yellow pigment (Novoperm Yellow 4G01, manufactured by CLARIANT) was further added, stirred and mixed, and then the mixture was kneaded with a wet type circulation mill to prepare an aqueous yellow ink base.

<Preparation of Aqueous Magenta Ink Base>

[0100] 64.3 parts by mass of water was added to 23.7 parts by mass of the aqueous resin varnish and mixed to prepare a resin varnish for pigment dispersion. To this varnish, 12 parts by mass of a magenta pigment (Inkjet Magenta E5B02, manufactured by CLARIANT) was further added, stirred and mixed, and then the mixture was kneaded with a wet type circulation mill to prepare an aqueous magenta ink base.

<Preparation of Aqueous Cyan Ink Base>

[0101] 64.3 parts by mass of water was added to 23.7 parts by mass of the aqueous resin varnish and mixed to prepare a resin varnish for pigment dispersion. To this varnish, 12 parts by mass of a cyan pigment (Heliogen Blue L7101F, manufactured by BASF) was further added, stirred and mixed, and then the mixture was kneaded with a wet type circulation mill to prepare an aqueous cyan ink base.

<Preparation of Aqueous White Pigment Base>

[0102] 20.0 parts by mass of water was added to 40.0 parts by mass of the aqueous resin varnish and mixed to prepare a resin varnish for pigment dispersion. To this varnish, 40 parts by mass of titanium oxide (R-960, manufactured by DuPont) was further added, stirred and mixed, and then the mixture was kneaded with a wet type circulation mill to prepare an aqueous white pigment base.

<Surfactant>

[0103] OLFINE E1010 (solid content: 100%, HLB: 13-14, manufactured by Nissin Chemical Industry Co., Ltd.)

[0104] OLFINE E1004 (solid content: 100%, HLB 7-9, manufactured by Nissin Chemical Industry Co., Ltd.)

<Resin Emulsion>

(Acryl-Based Resin Emulsion Emulsified with Polymer)

[0105] PE-1126 (solid content: 41.5%, acrylic resin emulsion emulsified with a polymer, manufactured by SEIKO PMC CORPORATION, Tg: 12 C.)

[0106] JE-1113 (solid content: 42.5%, acrylic resin emulsion emulsified with a polymer, manufactured by SEIKO PMC CORPORATION, Tg: 24 C.)

[0107] HE-1335 (solid content: 45.5%, acryl-styrene resin emulsion emulsified with a polymer, manufactured by SEIKO PMC CORPORATION, Tg: 15 C.)

[0108] QE-1042 (solid content: 40.5%, acryl-styrene resin emulsion emulsified with a polymer, manufactured by SEIKO PMC CORPORATION, Tg: 53 C.)

(Acryl-Based Resin Emulsion Emulsified with Emulsifier)

[0109] Mowinyl 7320 (solid content: 40.0%, acrylic resin emulsion emulsified with an emulsifier, manufactured by Japan Coating Resin co., ltd., Tg: 20 C.)

[0110] Mowinyl 730L (solid content: 46.0%, acrylic resin emulsion emulsified with an emulsifier, manufactured by Japan Coating Resin co., ltd., Tg:13 C.)

Neo-Cryl A-1125 (solid content: 19.5%, acrylic resin emulsion emulsified with an emulsifier, manufactured by DSM NeoResins, Tg: 13 C.)

[0111] Neo-Cryl A-1093 (solid content: 45.5%, acryl-styrene resin emulsion emulsified with an emulsifier, manufactured by DSM NeoResins, Tg: 17 C.)

<Polyvinyl-Based Resin>

[0112] Neo-Cryl A-1094 (solid content: 45.5%, acryl-styrene resin emulsion, manufactured by DSM NeoResins)

[0113] Neo-Cryl A-1125 (solid content: 19.5%, acrylic resin emulsion, manufactured by DSM NeoResins)

[0114] Vinyblan 715S (solid content: 23%, vinyl chloride resin emulsion, manufactured by Nissin Chemical Industry Co., Ltd.)

[0115] AUROREN AE-301 (solid content: 30%, polyolefin resin emulsion, manufactured by Nippon Paper Industries Co., Ltd.)

[0116] JONCRYL JDX-6639 (solid content: 29%, acryl-styrene resin aqueous solution, manufactured by BASF)

[0117] 3401MA (solid content: 40%, acrylic resin aqueous solution, manufactured by Taisei Fine Chemical Co., Ltd.)

<Polyurethane-Based Resin>

[0118] SUPERFLEX 150HS (solid content: 38%, polyurethane resin emulsion, manufactured by DKS Co. Ltd.)

[0119] HYDRAN HW350 (solid content: 30%, polyester polyurethane resin aqueous solution, manufactured by DIC Corporation)

<Polyester-Based Resin>

[0120] elitel KT-9204 (solid content: 30%, polyester resin emulsion, manufactured by UNITIKA LTD.)

[0121] PLAS COAT Z-730 (solid content: 25%, polyester resin aqueous solution, manufactured by GOO Chemical Co., Ltd.)

<Wax Emulsion>

[0122] AQUACER 531 (solid content: 45%, polyethylene resin emulsion, average particle size: 160 nm, manufactured by BYK Japan KK)

[0123] AQUACER 539 (solid content: 35%, polyethylene wax emulsion, average particle size: 50 nm, manufactured by BYK Japan KK)

[0124] CHEMIPEARL W-400 (solid content: 40%, polyethylene resin emulsion, average particle size: 4.0 m, manufactured by Mitsui Chemicals, Inc.)

Example 1

[0125] Each material was mixed and stirred according to a mass ratio (% by mass) shown in Table 1 below to prepare a primer composition (P1). Storage stability of the obtained primer composition was evaluated by the following evaluation method. The results are shown in Table 1. Moreover, each material was kneaded in a paint conditioner according to a mass ratio (% by mass) shown in Table 2 below to prepare an ink composition (K1). Using an ink set consisting of the primer composition (P1) and the ink composition (K1), gravure printing was performed under the following condition to obtain a printed matter. Solid formation, bleeding of thin line (bleeding resistance), abrasion resistance, alcohol resistance, and heat resistance of the obtained printed matter were evaluated according to the following evaluation methods. The results are shown in Tables 4 and 5.

TABLE-US-00001 TABLE 1 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 Aqueous white pigment base 23.3 23.3 23.3 23.3 23.3 23.3 23.3 23.3 23.3 Resin Acryl Emulsified PE-1126 20.0 20.0 5.0 30.0 20.0 20.0 20.0 20.0 20.0 20.0 emulsion (Tg 12 C.) with polymer (solid Acryl Emulsified JE-1113 content) (Tg 24 C.) with polymer Acryl-styrene Emulsified HE-1335 (Tg 15 C.) with polymer Acryl-styrene Emulsified QE-1042 (Tg 53 C.) with polymer Acryl Emulsified Mowinyl (Tg 20 C.) with 7320 emulsifier Acryl Emulsified Mowinyl (Tg 13 C.) with 730L emulsifier Acryl Emulsified Neo-Cryl (Tg 13 C.) with A-1125 emulsifier Acryl-styrene Emulsified Neo-Cryl (Tg 17 C.) with A-1093 emulsifier Chlorinated SUPERCHLON E480T 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 5.0 polyolefin emulsion (solid content) Hydrazide Adipic acid dihydrazide 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 compound N-oleoyl sarcosine 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 Wax Polyethylene wax AQUACER531 emulsion (particle size: (solid 160 nm) content) Polyethylene wax CHEMIPEARL W-400 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 (particle size: 4 m) Water- Dipropylene glycol dimethyl ether 5.0 soluble Tripropylene glycol monobutyl ether 0.5 organic 3-methoxy-3-methyl-1-butanol 5.0 solvent Isopropanol 10.0 Water 50.8 74.1 65.8 40.8 45.8 50.3 45.8 40.8 52.8 47.8 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Storage stability P11 P12 P13 P14 P15 P16 P17 P18 P19 Aqueous white pigment base 23.3 23.3 23.3 23.3 23.3 23.3 23.3 23.3 23.3 Resin Acryl Emulsified PE-1126 20.0 20.0 20.0 20.0 20.0 20.0 20.0 emulsion (Tg 12 C.) with polymer (solid Acryl Emulsified JE-1113 20.0 content) (Tg 24 C.) with polymer Acryl-styrene Emulsified HE-1335 20.0 (Tg 15 C.) with polymer Acryl-styrene Emulsified QE-1042 (Tg 53 C.) with polymer Acryl Emulsified Mowinyl (Tg 20 C.) with 7320 emulsifier Acryl Emulsified Mowinyl (Tg 13 C.) with 730L emulsifier Acryl Emulsified Neo-Cryl (Tg 13 C.) with A-1125 emulsifier Acryl-styrene Emulsified Neo-Cryl (Tg 17 C.) with A-1093 emulsifier Chlorinated SUPERCHLON E480T 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 polyolefin emulsion (solid content) Hydrazide Adipic acid dihydrazide 0.1 5.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 compound N-oleoyl sarcosine 0.9 0.9 0.1 5.0 0.9 0.9 0.9 0.9 0.9 Wax Polyethylene wax AQUACER531 2.0 emulsion (particle size: (solid 160 nm) content) Polyethylene wax CHEMIPEARL 2.0 2.0 2.0 2.0 0.1 10.0 2.0 2.0 (particle size: W-400 4 m) Water- Dipropylene glycol dimethyl ether soluble Tripropylene glycol monobutyl ether organic 3-methoxy-3-methyl-1-butanol solvent Isopropanol Water 51.7 46.8 51.6 46.7 50.8 52.7 42.8 50.8 50.8 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Storage stability

TABLE-US-00002 TABLE 2 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 Aqueous white pigment base 23.3 23.3 23.3 23.3 23.3 23.3 23.3 23.3 23.3 23.3 Resin Acryl Emulsified PE-1126 1.0 20.0 20.0 20.0 emulsion (Tg 12 C.) with polymer (solid Acryl Emulsified JE-1113 content) (Tg 24 C.) with polymer Acryl-styrene Emulsified HE-1335 (Tg 15 C.) with polymer Acryl-styrene Emulsified QE-1042 20.0 (Tg 53 C.) with polymer Acryl Emulsified Mowinyl 20.0 (Tg 20 C.) with 7320 emulsifier Acryl Emulsified Mowinyl 20.0 (Tg 13 C.) with 730L emulsifier Acryl Emulsified Neo-Cryl 20.0 (Tg 13 C.) with A-1125 emulsifier Acryl-styrene Emulsified Neo-Cryl 20.0 (Tg 17 C.) with A-1093 emulsifier Chlorinated SUPERCHLON E480T 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 polyolefin emulsion (solid content) Hydrazide Adipic acid dihydrazide 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 compound N-oleoyl sarcosine 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 Wax Polyethylene wax AQUACER531 emulsion (particle size: (solid 160 nm) content) Polyethylene wax CHEMIPEARL W-400 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 (particle size: 4 m) Water- Dipropylene glycol dimethyl ether soluble Tripropylene glycol monobutyl ether organic 3-methoxy-3-methyl-1-butanol solvent Isopropanol Water 70.8 69.8 51.8 51.7 52.8 50.8 50.8 50.8 50.8 50.8 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Storage stability

TABLE-US-00003 TABLE 3 K1 Y1 M1 C1 K2 K3 K4 K5 K6 Aqueous black ink base A 37.5 37.5 37.5 37.5 37.5 37.5 Aqueous black ink base B Aqueous yellow ink base 50.0 Aqueous magenta ink base 50.0 Aqueous cyan ink base 34.0 Water- Polyvinyl Acryl-styrene Neo-Cryl A- 1.0 1.0 1.0 1.0 insoluble resin resin emulsion 1094 resin Acrylic resin Neo-Cryl A- 1.0 (solid emulsion 1125 content) Vinyl chloride Vinyblan 715S 1.0 resin emulsion Polyolefin AUROREN 1.0 resin emulsion AE-301 Polyurethane resin SUPERFLEX 1.0 emulsion 150HS Polyester resin elitel KT-9204 1.0 emulsion Water- Polyvinyl Acryl-styrene JONCRYL soluble resin resin aqueous JDX-6639 resin solution (solid Acrylic resin 3401MA content) aqueous solution Polyurethane resin HYDRAN aqueous solution HW350 Polyester resin PLAS COAT aqueous solution Z-730 Wax emulsion Polyethylene wax AQUACER531 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 (solid content) (particle size: 160 nm) Polyethylene wax AQUACER539 (particle size: 50 nm) Surfactant OLFINE E1010 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 OLFINE E1004 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Water-soluble organic Propylene glycol 30.0 30.0 30.0 37.0 30.0 30.0 30.0 30.0 30.0 solvent Water 29.5 17.0 17.0 26.0 29.5 29.5 29.5 29.5 29.5 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 K7 K8 K9 K10 K11 K12 K13 K14 K15 Aqueous black ink base A 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 Aqueous black ink base B 50.0 Aqueous yellow ink base Aqueous magenta ink base Aqueous cyan ink base Water- Polyvinyl Acryl-styrene Neo-Cryl 1.0 1.0 1.0 1.0 1.0 insoluble resin resin emulsion A-1094 resin Acrylic resin Neo-Cryl (solid emulsion A-1125 content) Vinyl chloride Vinyblan resin emulsion 715S Polyolefin AUROREN resin emulsion AE-301 Polyurethane resin SUPERFLEX emulsion 150HS Polyester resin elitel KT- emulsion 9204 Water- Polyvinyl Acryl-styrene JONCRYL 1.0 soluble resin resin aqueous JDX-6639 resin solution (solid Acrylic resin 3401MA 1.0 content) aqueous solution Polyurethane resin HYDRAN 1.0 aqueous solution HW350 Polyester resin PLAS COAT 1.0 aqueous solution Z-730 Wax emulsion Polyethylene wax AQUACER531 1.0 0.1 3.0 1.0 1.0 1.0 1.0 (solid content) (particle size: 160 nm) Polyethylene wax AQUACER539 1.0 (particle size: 50 nm) Surfactant OLFINE E1010 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 OLFINE E1004 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Water-soluble organic Propylene glycol 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 solvent Water 17.0 30.4 27.5 29.5 30.5 29.5 29.5 29.5 29.5 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0

Examples 2 to 31, Comparative Examples 1 to 15

[0126] According to the descriptions in Tables 1 to 3, a printed matter was produced and evaluated by the same method as in Example 1, except that types of primer compositions used (P2 to P29), types of ink compositions (K1 to K15, Y1, M1, C1), and formulations were changed. The results are shown in Tables 4 and 5.

<Storage Stability of Primer Composition>

[0127] Each of the primer compositions was placed in a glass bottle, and a viscosity at 25 C. thereof was measured using a viscometer (RE100L type, manufactured by Toki Sangyo Co., Ltd.). Then, it was sealed and stored at 60 C. for 1 month, and a viscosity (25 C.) after storage thereof was measured with a viscometer. Storage stability was evaluated with a rate of change in viscosity (100(60 C., viscosity after 1 month-viscosity before storage)/viscosity before storage).

(Evaluation Criteria)

[0128] : The rate of change in viscosity was less than 5%.

[0129] : The rate of change in viscosity was 5% or more and less than 10%.

[0130] x: The rate of change in viscosity was 10% or more and less than 30%.

<Condition for Creating Primer Layer>

[0131] The primer composition was printed under the following printing condition by utilizing a gravure printing machine on a treating surface of a base material and dried to form a primer layer.

(Printing Condition)

[0132] Base material: Biaxially oriented polypropylene film subjected to a corona discharge treatment, P-2111, manufactured by TOYOBO CO., LTD., thickness: 20 m

[0133] Printing equipment: Gravure printing machine

[0134] Printing plate: Helio 175-line solid version

[0135] Printing speed: 15 m/min

[0136] Drying condition: 80 C.

<Solid Formation>

[0137] The ink composition in Table 3 was mounted on an inkjet printer, and 20 cm11.5 cm of a solid image was printed on a surface of each primer layer as prepared above to obtain a printed matter, which was visually observed and evaluated according to the following criteria.

(Evaluation criteria)

[0138] : No unevenness and streak were observed on the printed matter.

[0139] : Slight unevenness and streak were observed on the printed matter.

[0140] x: Unevenness and streak were visually observed on the printed matter.

<Bleeding of Thin Line>

[0141] The ink composition in Table 3 was mounted on the inkjet printer, about 0.3 mm of a thin line was printed on a surface of each primer layer as prepared above, and thickening due to bleeding was visually observed and evaluated according to the following criteria.

(Evaluation Criteria)

[0142] : No bleeding was observed, and printing was possible with the thickness as it was. [0143] : Partial thickening was observed, but double or more thickening was not observed. [0144] x: Double or more thickening was observed as a whole.

<Abrasion Resistance>

[0145] The printed matter of the solid image was cut into a 2.5 cm20 cm test piece, which was rubbed on its printed surface with a bleached cloth with a reciprocating load of 500 g100 times using a Gakushin-Type Rubbing Tester (manufactured by Daiei Kagaku Seiki MFG Co., Ltd.), and abrasion resistance was evaluated from a degree of falling-off of the ink according to the following evaluation criteria.

(Evaluation Criteria)

[0146] : The coating film on which the solid image was formed did not peel off at all.

[0147] : The coating film on which the solid image was formed slightly peeled off.

[0148] x: The coating film on which the solid image was formed almost peeled off.

<Alcohol Resistance>

[0149] The printed matter of the solid image was cut into a 2.5 cm20 cm test piece, which was rubbed on its printed surface with a bleached cloth permeated with 5 drops of 70% ethanol aqueous solution using an injection needle with a reciprocating load of 200 g10 times using a Gakushin-Type Rubbing Tester (manufactured by Daiei Kagaku Seiki MFG Co., Ltd.), and ethanol resistance was evaluated from a degree of falling-off of the ink according to the following evaluation criteria.

(Evaluation criteria)

[0150] : The coating film on which the solid image was formed did not peel off at all.

[0151] : The coating film on which the solid image was formed slightly peeled off.

[0152] x: The coating film on which the solid image was formed almost peeled off.

<Heat Resistance>

[0153] Using a heat seal tester equipped with a hot plate having a thermal gradient at 160 to 200 C., a printed surface and an aluminum foil were pressed at a pressure of 2.0 kg/cm.sup.2 for 1 second. From the minimum temperature at which the ink on the printed surface transferred to the aluminum foil, heat resistance was evaluated according to the following evaluation criteria.

(Evaluation criteria)

[0154] : The minimum temperature at which the ink on the printed surface transferred to the aluminum foil was 200 C. or higher.

[0155] : The minimum temperature at which the ink on the printed surface transferred to the aluminum foil was 160 C. or higher and lower than 200 C.

[0156] x: The minimum temperature at which the ink on the printed surface transferred to the aluminum foil was lower than 160 C.

TABLE-US-00004 TABLE 4 Example 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Primer composition for surface- P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 printed flexible packaging Aqueous inkjet ink composition K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 Evaluation on IJ Solid image quality formation Bleeding of thin line Evaluation on coating Abrasion film resistance resistance Alcohol resistance Heat resistance Example 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Primer composition for surface printed P17 P18 P19 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 flexible packaging Aqueous inkjet ink composition K1 K1 K1 Y1 M1 C1 K2 K3 K4 K5 K6 K7 K8 K9 K10 Evaluation on IJ image Solid formation quality Bleeding of thin line Evaluation on coating Abrasion film resistance resistance Alcohol resistance Heat resistance

TABLE-US-00005 TABLE 5 Comparative example 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Primer composition for surface printed P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P1 P1 P1 P1 P1 flexible packaging Aqueous inkjet ink composition K1 K1 K1 K1 K1 K1 K1 K1 K1 K1 K11 K12 K13 K14 K15 Evaluation on IJ image Solid formation quality Bleeding of thin line Evaluation on coating Abrasion x film resistance resistance Alcohol x x x x x x x x x x x x x x resistance Heat x resistance