阅读说明：本技术 一种采用水性油墨印刷纸张的方法 (Method for printing paper by using water-based ink ) 是由 卿前仲 陈威 邱巳威 于 2019-09-10 设计创作，主要内容包括：本发明涉及一种采用水性油墨印刷纸张的方法,包括印刷基材和涂布在印刷基材上的油墨层,所述方法依次包括以下步骤：油墨制备、油墨印刷和油墨烘干；本发明的优点：通过色料、丙烯酸树脂、水、醇、润滑剂、表面活性剂和交联剂混合制备的油墨,依靠丙烯酸树脂为载体,不需要用任何的有机溶剂稀释,用水作溶解载体,增加油墨的附着性和成膜性,改善印刷流平,增加色饱和度,改善油墨的附着性,不污染环境、减少残留毒物、减消耗降成本,由于柔版印刷机其油墨的转移只是一个平面转移到另外一个平面,即油墨从印版的网点平面转移到印刷基材的平面上去,因为是平面对平面,油墨的转移量比较少,从而提高了油墨印刷的质量。(The invention relates to a method for printing paper by using water-based ink, which comprises a printing substrate and an ink layer coated on the printing substrate, and sequentially comprises the following steps: preparing ink, printing the ink and drying the ink; the invention has the advantages that: the ink prepared by mixing the pigment, the acrylic resin, water, alcohol, the lubricant, the surfactant and the cross-linking agent depends on the acrylic resin as a carrier, does not need to be diluted by any organic solvent, uses water as a dissolving carrier, increases the adhesiveness and the film forming property of the ink, improves the printing leveling property, increases the color saturation, improves the adhesiveness of the ink, does not pollute the environment, reduces residual toxic substances and reduces the consumption and cost.)

1. A method of printing paper with aqueous ink comprising printing a substrate, characterized in that: the printing ink further comprises an ink layer coated on the printing substrate, wherein the ink layer comprises the following components in parts by weight: 10.9-15.3 parts by weight of pigment, 22.3-35.1 parts by weight of acrylic resin, 14.3-16.1 parts by weight of water, 1.2-1.5 parts by weight of alcohol, 0.12-0.19 part by weight of lubricant, 0.11-0.15 part by weight of surfactant and 0.13-0.2 part by weight of cross-linking agent, wherein the method sequentially comprises the following steps:

the method comprises the following steps: stirring a coloring material, acrylic resin, water, alcohol, a lubricant, a surfactant and a cross-linking agent by a stirrer to form ink;

step two: printing the ink formed by stirring in the step one on the upper surface of a printing substrate by a flexographic printing machine at a printing speed of 150-180 m/min;

step three: and drying the printing ink printed in the second step by using an oven, wherein when the printing ink area M on the printing substrate is more than or equal to 70%, the temperature of the oven is 60-80 ℃, when the printing ink area M on the printing substrate is more than 70% and more than or equal to 30%, the temperature of the oven is 50-60 ℃, when the printing ink area M on the printing substrate is less than 30%, the temperature of the oven is 40-50 ℃.

2. A method of printing paper with aqueous ink according to claim 1, characterised in that: the drying oven comprises an air nozzle, the diameter of the air nozzle is not more than 3.5mm, the length of the drying oven is equal to 2m, and the air speed in the drying oven is equal to 15-20 m/s.

3. A method of printing paper with aqueous ink according to claim 1, characterised in that: the press roller in the flexographic printing machine is a rubber press roller.

4. A method of printing paper with aqueous ink according to claim 1, characterised in that: the printing base material is base paper or single copper paper, and the weight of each square of the printing base material is 25-120 g.

Technical Field

The invention relates to a method for printing paper by using water-based ink.

Background

Flexographic printing is called flexographic printing for short, and is a direct rotary printing method, wherein an elastic raised image printing plate is used, the printing plate can be adhered to a printing plate cylinder with variable length, the printing plate generally adopts a photosensitive resin plate with the thickness of 1-5 mm, the flexographic printing belongs to an embossing type, and compared with gravure printing, offset printing and traditional embossing, the flexographic printing mode has the distinct characteristics of low cost, simple equipment, high efficiency, wide range, good quality, environmental protection, rich printed product layers, distinct colors and good visual effect, is widely used for food and packaging printing at present, and has wide prospect.

The ink is generally composed of materials such as a binder, a pigment, a filler, a solvent, an auxiliary agent and the like, most of the traditional ink is an organic solvent type and often contains aromatic compounds such as toluene, xylene and the like, so that air pollution is caused in the using process, carcinogenic substances are volatilized, and harm is caused to the health of workers.

Disclosure of Invention

The invention aims to provide a method for printing paper by using water-based ink, which can improve the performance of the ink and reduce the pollution to the environment in the using process.

In order to solve the technical problems, the invention is realized by the following technical scheme: a method for printing paper by using water-based ink comprises a printing substrate and an ink layer coated on the printing substrate, wherein the ink layer comprises the following components in parts by weight: 10.9-15.3 parts by weight of pigment, 22.3-35.1 parts by weight of acrylic resin, 14.3-16.1 parts by weight of water, 1.2-1.5 parts by weight of alcohol, 0.12-0.19 part by weight of lubricant, 0.11-0.15 part by weight of surfactant and 0.13-0.2 part by weight of cross-linking agent, wherein the method sequentially comprises the following steps:

the method comprises the following steps: stirring a coloring material, acrylic resin, water, alcohol, a lubricant, a surfactant and a cross-linking agent by a stirrer to form ink;

step two: printing the ink formed by stirring in the step one on the upper surface of a printing substrate by a flexographic printing machine at a printing speed of 150-180 m/min;

step three: and drying the printing ink printed in the second step by using an oven, wherein when the printing ink area M on the printing substrate is more than or equal to 70%, the temperature of the oven is 60-80 ℃, when the printing ink area M on the printing substrate is more than 70% and more than or equal to 30%, the temperature of the oven is 50-60 ℃, when the printing ink area M on the printing substrate is less than 30%, the temperature of the oven is 40-50 ℃.

Preferably, the oven comprises an air nozzle, the diameter of the air nozzle is not more than 3.5mm, the length of the oven is equal to 2m, and the air speed in the oven is equal to 15-20 m/s.

Preferably, the press roller in the flexographic printing machine is a rubber press roller.

Preferably, the printing substrate is base paper or single copper paper, and the weight of each square of the printing substrate is 25-120 g.

In conclusion, the invention has the advantages that: the ink prepared by mixing the pigment, the acrylic resin, water, alcohol, the lubricant, the surfactant and the cross-linking agent is prepared by taking the acrylic resin as a carrier, does not need to be diluted by any organic solvent, takes water as a dissolving carrier, increases the adhesiveness and the film-forming property of the ink, improves the printing leveling property, increases the color saturation, improves the adhesiveness of the ink, and has the remarkable characteristics of environmental protection and safety: the method has the advantages that the environment is not polluted, residual toxics are reduced, consumption and cost are reduced, secondly, the drying speed of the ink can be effectively controlled through the combination of alcohol and water, the preparation efficiency of the ink is improved, then the ink is printed on the upper surface of a printing substrate through a flexible printing machine, and the ink is only transferred from one plane to the other plane through the flexible printing machine, namely the ink is transferred from a screen dot plane of a printing plate to the plane of the printing substrate, so that the transfer amount of the ink is small, the saturation degree of the ink is lower compared with that of gravure printing ink, the printing fineness of the ink is lower than that of gravure printing ink, and the printing quality of the ink is improved.

Detailed Description

A method for printing paper by using water-based ink comprises a printing substrate and an ink layer coated on the printing substrate, wherein the ink layer comprises the following components in parts by weight: 10.9-15.3 parts by weight of pigment, 22.3-35.1 parts by weight of acrylic resin, 14.3-16.1 parts by weight of water, 1.2-1.5 parts by weight of alcohol, 0.12-0.19 part by weight of lubricant, 0.11-0.15 part by weight of surfactant and 0.13-0.2 part by weight of cross-linking agent, wherein the method sequentially comprises the following steps:

the method comprises the following steps: stirring a coloring material, acrylic resin, water, alcohol, a lubricant, a surfactant and a cross-linking agent by a stirrer to form ink;

step two: printing the ink formed by stirring in the step one on the upper surface of a printing substrate by a flexographic printing machine at a printing speed of 150-180 m/min;

step three: and drying the printing ink printed in the second step by using an oven, wherein when the printing ink area M on the printing substrate is more than or equal to 70%, the temperature of the oven is 60-80 ℃, when the printing ink area M on the printing substrate is more than 70% and more than or equal to 30%, the temperature of the oven is 50-60 ℃, when the printing ink area M on the printing substrate is less than 30%, the temperature of the oven is 40-50 ℃.

The ink prepared by mixing the pigment, the acrylic resin, water, alcohol, the lubricant, the surfactant and the cross-linking agent is prepared by taking the acrylic resin as a carrier, does not need to be diluted by any organic solvent, takes water as a dissolving carrier, increases the adhesiveness and the film-forming property of the ink, improves the printing leveling property, increases the color saturation, improves the adhesiveness of the ink, and has the remarkable characteristics of environmental protection and safety: the method has the advantages that the environment is not polluted, residual toxics are reduced, consumption and cost are reduced, secondly, the drying speed of the ink can be effectively controlled through the combination of alcohol and water, the preparation efficiency of the ink is improved, then the ink is printed on the upper surface of a printing substrate through a flexible printing machine, and the ink is only transferred from one plane to the other plane through the transfer of the ink of the flexible printing machine, namely the ink is transferred from a screen dot plane of a printing plate to the plane of the printing substrate, because the planes are opposite to the planes, the transfer amount of the ink is less, the saturation degree is lower compared with that of gravure printing ink, the printing fineness is lower than that of gravure printing ink, and the printing quality of the ink is improved.

The oven includes the tuyere, the diameter of tuyere is not more than 3.5mm, just the length of oven equals 2m, wind speed in the oven equals 15 ~ 20m/s, can improve drying efficiency, compression roller among the flexographic printing machine is the rubber compression roller, the pressure of control compression roller that can be good improves the printing effect of printing ink, avoids pressure to cause the site to warp greatly easily to and the pressure produces the bad problem of printing ink rendition for a short time, the printing substrate is body paper or single copper paper, and each square the weight of printing substrate is 25 ~ 120g, can select different printing substrates according to the demand of difference, and practicality is good.