CN114958083B

CN114958083B - Printing process of environment-friendly printing ink and printing ink

Info

Publication number: CN114958083B
Application number: CN202210689110.8A
Authority: CN
Inventors: 凌龙; 凌浩; 周红军; 李似宾
Original assignee: Huizhou Jiajing Printing Products Co ltd
Current assignee: Huizhou Jiajing Printing Products Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2023-08-15
Anticipated expiration: 2042-06-17
Also published as: CN114958083A

Abstract

The application relates to a printing process of environment-friendly printing ink and the printing ink. The method comprises the following steps: weighing 0.1-0.3 part of curing agent, 5-15 parts of toner, 100-120 parts of environment-friendly ink and 35-45 parts of water according to parts by weight, and uniformly mixing to obtain printing ink; printing ink on a printing stock, and curing for 5-10s at 60-80 ℃ to obtain a printed matter; the environment-friendly ink comprises the following raw materials in parts by weight: 80-100 parts of water-based ink; 25-35 parts of wear-resistant color-preserving filler; 0.5-1 part of dispersing agent; the water-based ink is prepared from water-based acrylic resin emulsion and polyurethane acrylic emulsion in a weight ratio of 3-5:1, the printing ink does not need to be glued in the printing process, has high environmental protection, and the printed product has high glossiness, good color retention effect, wear resistance and the like.

Description

Printing process of environment-friendly printing ink and printing ink

Technical Field

The application relates to the technical field of ink, in particular to a printing process of environment-friendly printing ink and the printing ink.

Background

The ink is a uniform mixture composed of substances such as color bodies (such as pigment, dye and the like), binder, filler, additive and the like; can print and dry on the printed body; is a colored pasty adhesive body with certain fluidity. Thus, color (hue), body (rheological properties such as thinness, fluidity, etc.), and drying properties are the three most important properties of the ink. They are of various kinds and different in physical properties, and are thick and sticky; while some are quite dilute. Some of them use vegetable oil as binder; some are resins and solvents or water, etc. as binders. These are determined according to the object to be printed, that is, the substrate, the printing method, the type of printing plate, the drying method, and the like.

After printing, the printing ink is coated on the surface of the printed pattern to maintain the gloss and durability of the printed pattern, so that the glossiness and fastness of the printed product are improved, the service life of the printed product is prolonged, and meanwhile, the printing ink has the protection effects of moisture resistance, water resistance, stain resistance, wear resistance, folding resistance, chemical corrosion resistance and the like.

Disclosure of Invention

In order to improve the glossiness and the fastness of a printed matter and improve the glossiness durability of a printed pattern, the application provides a printing process of environment-friendly printing ink and the printing ink.

In a first aspect, the printing process of the environment-friendly printing ink provided by the application adopts the following technical scheme:

a printing process of environment-friendly printing ink, comprising the following steps:

weighing 0.1-0.3 part of curing agent, 5-15 parts of toner, 100-120 parts of environment-friendly ink and 35-45 parts of water according to parts by weight, and uniformly mixing to obtain printing ink; printing ink on a printing stock, and curing for 5-10s at 60-80 ℃ to obtain a printed matter;

the environment-friendly ink comprises the following raw materials in parts by weight:

aqueous ink: 80-100 parts

Wear-resistant color-preserving filler: 25-35 parts

Diffusion agent: 0.5-1 part;

the water-based ink is prepared from water-based acrylic resin emulsion and polyurethane acrylic emulsion in a weight ratio of 3-5: 1.

The printing process has the advantages of simple operation and high production efficiency, and the application does not need to carry out glue treatment on printed printing stock in the printing process, so that the environmental pollution is reduced, and the environmental protection of the printing ink is improved. Printing in the printing process can be performed by adopting convex plate printing, concave plate printing, lithography or orifice plate printing; the curing agent is selected to have the curing time of 5-10s and the curing temperature of 60-80 ℃ so as to cure the printed patterns or characters and improve the production efficiency.

Further, the composition of the raw materials and the weight part range of the raw materials are the preferred composition and dosage range of the raw materials; wherein the solid content of the aqueous propylene resin emulsion is preferably 34-36%, the viscosity is 800-1500CPS, and the brand: jitian model: e0503, pH 6-7; the acrylic resin has excellent coating performance, light resistance, heat resistance, excessive baking resistance, chemical resistance, corrosion resistance and the like, has good gloss retention and color retention, can improve the glossiness and gloss durability of printed patterns, and simultaneously reduces the phenomena of corrosion and the like of the printed patterns, and the aqueous acrylic resin comprises acrylic resin emulsion, acrylic resin aqueous dispersion (also called water dilutable acrylic acid) and acrylic resin aqueous solution. Further, the aqueous propylene resin emulsion is mainly synthesized by emulsifying oily vinyl monomers in water under the initiation of aqueous free radical azo-diisobutyronitrile, and the aqueous resin dispersion is synthesized by different processes such as free radical solution polymerization or gradual solution polymerization.

The polyurethane acrylic emulsion is a polyurethane and styrene-acrylic hybrid dispersion, the selected brand is basf, wherein the solid content is preferably 42-44%, the PH value is 8, and the viscosity is 180-220mPa.s; the polyurethane acrylic emulsion can give high composite strength, has good compatibility with toner and wear-resistant color-retaining filler, excellent transferability and printability, has high composite strength (namely, patterns or characters obtained after printing ink have better connectivity with a printing material, the patterns or characters have strong bonding property with the printing material and are not easy to peel off, and have better adhesiveness in short), and the prepared ink has good printability and has good printing effect on different base materials (printing material), so the polyurethane acrylic emulsion is used for printing ink, is convenient for printing the printing ink, and meanwhile, the printed patterns are not easy to fall off.

The wear-resistant color-retaining filler has a good color-retaining effect, the color-retaining effect of the pad printing ink is further improved, the color of the printed pattern or character is vivid and the color retention is durable, and meanwhile, the firmness of the pattern or character on a printing stock can be improved. The dispersing agent can improve the dispersibility of the environment-friendly ink raw material system, and is convenient for printing ink to print, so that the printing effect is improved.

The environment-friendly ink is prepared from the aqueous acrylic resin emulsion, the polyurethane acrylic resin emulsion, the wear-resistant color-retaining filler and the dispersing agent, so that the environment-friendly printing performance is further improved, and meanwhile, the patterns transferred and printed are not easy to shed, bright in color, durable in color retention, acid and alkali resistant and the like.

Preferably, the wear-resistant color-preserving filler consists of wear-resistant filler and connecting color-preserving material in a weight ratio of 1:3-5.

The wear-resistant filler can improve the wear resistance of the printing ink, the connection of the color retention material can improve the consistency and the adhesiveness of the printing ink, and the printed pattern has better color retention effect,

preferably, the wear-resistant filler is prepared from the following raw materials in parts by weight:

white carbon black 5-10 parts

3-8 parts of shell powder

2-5 parts of mica powder

1.5-2.5 parts of coupling agent.

The white carbon black is gas-phase white carbon black, which is one of extremely important nano-scale inorganic raw materials, has specific properties in the aspects of large specific surface area, strong surface adsorption force, large surface energy, good dispersion property, thermal resistance and the like, and can be uniformly dispersed in printing ink by virtue of excellent stability, reinforcement property, thickening property and thixotropy, so that a printed pattern has good wear resistance; the shell powder is prepared from natural shells serving as raw materials, contains 95% of calcium carbonate, chitin and a small amount of amino acid and polysaccharide substances, and has the functions of reinforcing, resisting bacteria and inhibiting bacteria; the mica powder is a novel functional green environment-friendly filler, and the unique two-dimensional flaky blocking, ultraviolet light shielding, chemical structure stability and other functions effectively improve the permeation resistance, weather resistance, wear resistance and corrosion resistance of the printed pattern; the particle sizes of the white carbon black, the mica powder and the shell powder are 100-200 meshes, and the white carbon black, the mica powder and the shell powder are compounded to play a synergistic effect, so that the wear resistance of printed patterns or characters can be enhanced, the coupling agent can play a role of bridging, the compatibility of the white carbon black, the mica powder and the shell powder in polymer species is improved, and the wear resistance of the printed patterns or characters is further improved.

Preferably, the connection preservative is prepared from the following raw materials in parts by weight:

15-20 parts of xanthan gum mother liquor with mass fraction of 1-3%

Sodium carboxymethylcellulose 0.5-1 part

0.5-0.8 part of hydroxyethyl cellulose

3-5 parts of light stabilizer

20-30 parts of water.

The xanthan gum mother liquor is obtained by dissolving xanthan gum in water, and the xanthan gum is extracellular microbial polysaccharide produced by fermenting saccharides with xanthomonas. Because of the special structure and colloid characteristic of the macromolecule, the application can be used as a stabilizer, a gel thickener, a sizing agent, a film forming agent and the like, and the application can facilitate the forming of a printed pattern by adopting the xanthan gum mother liquor with mass fraction of 1-3%, improve the combination property of the printed pattern and a printing stock, prevent the printed pattern from falling off, and the carboxymethyl cellulose sodium can be used as an adhesive; and the hydroxyethyl cellulose has a binding effect, so that the xanthan gum mother liquor, the sodium carboxymethyl cellulose and the hydroxyethyl cellulose are used in a compounding way to play a synergistic effect, and the firmness of the printed pattern and the printing stock is further enhanced.

Generally, printed patterns or characters have dark colors (not bright, matte, etc.) at high temperature or after ultraviolet irradiation, so the application reduces the absorption of ultraviolet light by the printed patterns or characters by adding the light stabilizer, prevents the damage of harmful ultraviolet light to the color or weakens the damage of the harmful ultraviolet light to the color, and further improves the photopic durability of the printed patterns or characters.

Preferably, the light stabilizer is prepared by the steps of:

1-2 parts of light stabilizer 1130, 1-3 parts of chitosan and 5-10 parts of water are weighed according to parts by weight and stirred for 10-20min to obtain the light stabilizer.

The preparation method can obtain the ultraviolet absorption effect of the light stabilizer for the printing ink, and improve the color and luster durability of the printed patterns or characters.

Light stabilizer 1130 is a benzotriazole ultraviolet light absorber for the coating industry, wherein the kinetic viscosity at 20℃is 7400mPa.s and the density at 20℃is 1.17g/cm3.

Preferably, the wear-resistant color-preserving filler is prepared by the following steps:

preparation of wear-resistant filler: weighing 1.5-2.5 parts of coupling agent by weight for hydrolysis for 0.5-1h to obtain modified liquid for later use; weighing 5-10 parts of white carbon black, 3-8 parts of shell powder and 2-5 parts of mica powder, performing ball milling for 1-3 hours to obtain a mixture, dispersing the mixture in the modified liquid, stirring for 10-30 minutes, filtering, and drying filter residues to obtain wear-resistant filler for later use;

and (3) connecting a color retention material: weighing 20-30 parts of water, heating to 45-55 ℃, sequentially adding 3-5 parts of light stabilizer, 0.5-1 part of sodium carboxymethylcellulose, 0.5-0.8 part of hydroxyethyl cellulose, uniformly stirring, vibrating for 30-50min, adding 15-20 parts of xanthan gum mother liquor with the mass fraction of 1-3%, and uniformly stirring to obtain a connection pigment for later use;

preparing wear-resistant color-preserving filler: the wear-resistant filler and the connection color retention material are weighed according to the weight ratio of 1:3-5 and are uniformly stirred, so that the wear-resistant color retention filler is obtained.

Preferably, the dispersing agent is one or more of polyethylene glycol, peregal and aqueous dispersing agent SN-5040.

Wherein the brand of the aqueous dispersant SN-5040 is Taiwan in China, the solid content is 43%, and the number is 1803; the average molecular weight of polyethylene glycol is 200-400; the manufacturer of peregal, nantong North chemical Co., ltd., model O-30; one or two of polyethylene glycol, peregal and aqueous dispersant SN-5040 are adopted to make the printing ink have better diffusion effect and improve printing adaptability.

Preferably, the toner is one of silver powder, iron oxide red, iron oxide yellow, carbon black, phthalocyanine blue and phthalocyanine green.

Preferably, the environment-friendly ink is prepared by the following steps:

the weight ratio of 3-5:1, uniformly stirring the aqueous acrylic resin emulsion and the polyurethane acrylic emulsion to obtain aqueous ink; weighing 80-100 parts of water-based ink, 25-35 parts of wear-resistant color-retaining filler and 0.5-1 part of dispersing agent, uniformly mixing, heating to 95-105 ℃, and stirring for 1-2 hours to obtain the environment-friendly ink.

The preparation method has the advantages of simple operation and high production efficiency, and the printing ink prepared from the environment-friendly ink has a good printing effect when being used for printing, so that a printed product has good gloss, lasting gloss, wear resistance, solvent resistance and the like.

In a second aspect, the present application provides a printing ink, which adopts the following technical scheme:

72 parts of aqueous acrylic resin emulsion

Polyurethane acrylic emulsion 18 parts

30 parts of wear-resistant color-preserving filler

Curing agent 0.2 part

0.2 part of dispersing agent

10 parts of toner

40 parts of water.

The raw materials and the weight parts of the raw materials of the printing ink are preferably selected, the printing ink obtained by selecting the raw materials in parts by weight has a good printing effect, and the printed patterns or characters are not easy to fall off, the glossiness is good, the color retention is durable, the acid and alkali resistance is good, and the like.

In summary, the application has the following beneficial effects:

1. the environment-friendly printing ink is prepared from the aqueous acrylic resin emulsion, the polyurethane acrylic emulsion, the wear-resistant color-retaining filler and the dispersing agent, so that the environment-friendly printing ink not only improves the printing environment-friendliness, but also is not easy to shed, bright in color, durable in color retention, acid-base-resistant and the like for the pattern placed by pad printing.

2. The application preferably adopts the composite use of the xanthan gum mother liquor, the sodium carboxymethyl cellulose and the hydroxyethyl cellulose to ensure that the patterns or characters printed by the printing ink are stably adhered on a printing stock, so that the falling of the printed patterns or characters can be reduced even if the printed patterns or characters are not glued, the ultraviolet light absorption of the printing ink can be improved by the added light stabilizer, the ultraviolet light absorption of the printed patterns or characters can be improved, the darkening of the colors of the printed patterns or characters can be reduced, and the durability of the colors can be improved.

Detailed Description

The following preparations and examples illustrate the application in further detail.

Preparation of light stabilizer

Preparation example 1

A light stabilizer, prepared by the steps of:

step 1: 1Kg of light stabilizer 1130, 1Kg of chitosan and 5Kg of water are weighed and stirred for 10min to obtain the light stabilizer.

PREPARATION EXAMPLES 2-3

Preparation examples 2 to 3 differ from preparation example 1 in that: the amounts of the raw materials and the process parameters are different, and are shown in the table 1;

TABLE 1 amounts of raw materials (Kg) and process parameters for preparation examples 1-3

Raw materials/Process parameters	Preparation example 1	Preparation example 2	Preparation example 3
				Light stabilizer 1130	1	1.5	2
Chitosan	1	2	3
				Water and its preparation method	5	8	10
Stirring time (min)	10	15	20

Preparation example of wear-resistant color-preserving filler

Preparation example 4

A wear-resistant color-preserving filler is prepared by the following steps:

Preparation examples 5 to 6

Preparation examples 5 to 6 differ from preparation example 4 in that: the amounts of raw materials and the process parameters are different, and are shown in table 2;

TABLE 2 raw materials used (Kg) and Process parameters for preparation examples 4-6

Preparation of comparative example

Preparation of comparative example 1

The preparation comparative example 1 is different from the preparation example 4 in that: the xanthan gum mother liquor is replaced with equal amount of water.

Preparation of comparative example 2

The preparation comparative example 2 is different from the preparation example 4 in that: hydroxyethyl cellulose is replaced with equal amount of water.

Preparation of comparative example 3

The preparation of comparative example 3 differs from that of preparation example 4 in that: the light stabilizer is replaced with equal amount of water.

Preparation of comparative example 4

The preparation comparative example 4 is different from the preparation example 4 in that: the shell powder is replaced by white carbon black in equal quantity.

Preparation example of printing ink

Preparation example 7

A printing ink, prepared by the steps of:

3-5 parts by weight: 1, uniformly stirring the aqueous acrylic resin emulsion and the polyurethane acrylic emulsion to obtain aqueous ink; weighing 80-100 parts of water-based ink, 25-35 parts of wear-resistant color-preserving filler in preparation example 4 and 0.5-1 part of dispersing agent, uniformly mixing, heating to 95-105 ℃, and stirring for 1-2 hours to obtain the environment-friendly ink.

Preparation examples 7 to 9

Preparation examples 7 to 9 differ from preparation example 1 in that: the amounts of the raw materials, the stirring time and the heating temperature are different, and are shown in Table 3;

TABLE 3 raw material amount (Kg), stirring time and heating temperature of preparation examples 7 to 9

Preparation examples 10 to 13

The preparation examples 10 to 13 differ from the preparation example 1 in that: the sources of the wear-resistant color-preserving fillers are different, and are shown in the table 4;

TABLE 4 sources of abrasion resistant color retention fillers of PREPARATIVE EXAMPLES 7-13

Preparation example	Source of wear-resistant colour-retaining filler
		Preparation example 7	Preparation example 4
Preparation example 8	Preparation example 5
		Preparation example 9	Preparation example 6
Preparation example 10	Preparation of comparative example 1
		PREPARATION EXAMPLE 11	Preparation of comparative example 2
Preparation example 12	Preparation of comparative example 3
		Preparation example 13	Preparation of comparative example 4

Preparation of comparative example

Preparation of comparative example 5

The preparation of comparative example 5 differs from that of preparation 7 in that: the polyurethane acrylic emulsion is replaced by the aqueous acrylic resin emulsion in equal quantity.

Preparation of comparative example 6

The preparation of comparative example 6 differs from that of preparation example 7 in that: the wear-resistant color-retaining filler is replaced by water-based acrylic resin emulsion in an equivalent way.

Example 1

weighing 0.1Kg of curing agent, 10Kg of iron oxide red, 100Kg of environment-friendly printing ink obtained in preparation example 7 and 35Kg of water, and putting into an ink stirring tank for uniform mixing to obtain printing ink; printing the printing ink on a printing stock, and curing for 5s at 60 ℃ to obtain a printed matter.

Examples 2 to 3

Examples 2-3 differ from example 1 in that: the differences of the raw material consumption, the environment-friendly ink sources, the curing time and the curing temperature are shown in the table 5;

TABLE 5 amounts of raw materials, sources of environmentally friendly inks, curing time, curing temperature for examples 1-3

Examples 4 to 8

Examples 4-8 differ from example 1 in that: the sources of the environment-friendly ink are different, and are shown in the table 6;

TABLE 6 sources of environmentally friendly inks of examples 1-8

Comparative example

Comparative example 1

Comparative example 1 differs from example 1 in that: the pattern or character printed by the printing ink is further glued, and the specific steps are as follows: heating PVC (transparent grade; brand: asian celebration plastic) to 135 deg.C and melting to obtain a glue solution, coating the glue solution on patterns or characters with a coating weight of 30g/m ² Cooling at normal temperature, and solidifying to obtain the glued printed product.

Comparative example 2

Comparative example 2 is different from example 1 in that: the ink of comparative example 6 was used as an environmental-friendly ink.

Comparative example 3

Comparative example 3 is different from example 1 in that: the printing ink used was ink produced by Winz, rey printing materials Co., ltd, and had a viscosity of 200-280PCS.

Performance test

1. Gloss level

The prints obtained in examples 1-8 and preparations 1-3 were tested for gloss using a gloss tester (model: HG 268) with reference to GB/T9754-2007, designated A1, at a test angle of 60 °; the prints obtained in examples 1-8 and preparations 1-3 were then placed in an oven at 80℃for 4 hours, and the gloss was again checked and designated A2.

2. Water resistance

The prints obtained in examples 1 to 8 and preparation examples 1 to 3 were immersed in water at 50℃for 4 hours, and the patterns were observed, and if the peeling or peeling phenomenon occurred, the prints were not acceptable, and the peeling or peeling phenomenon did not occur, the prints were acceptable.

3. Alcohol resistance

Wiping the printed matters obtained in examples 1-8 and preparation examples 1-3 with alcohol with mass fraction of 99% back and forth for 5 times to observe whether the printed matters fade or not, and if the printed matters appear to fade to be unqualified, the printed matters do not fade to be qualified;

4. abrasion resistance

The prints obtained in examples 1-8 and preparations 1-3 were subjected to abrasion resistance testing by an ink abrasion resistance tester (model: RT-01; test method: dry abrasion; reference ASTM D5264-98 (2004) standard test method for abrasion resistance of printed materials by a Su Selan De-abrasion tester), rubbed back and forth with a 5N force rubber, and when strike-through or abrasion was failed, no abrasion occurred or strike-through was accepted;

TABLE 7 Experimental data for examples 1-8 and preparation examples 1-3

As can be seen from the combination of examples 1 and comparative examples 1-3 and table 7, comparative example 1 further gummed the printed product prepared in example 1 of the present application, the gloss after gumming did not increase much, indicating that the ink printed in the present application had better gloss, whereas the printed product in comparative example 1 was significantly reduced in gloss when placed in an oven (the gloss was reduced from 95.5% to 92.3% and 3.2% after oven baking in comparative example 1, and the gloss was reduced from 95.3% to 94.5% and 0.8% after oven baking in example 1), and the gloss reduction was reduced by example 1 under high temperature baking, indicating that the printed ink of the present application was able to maintain a long gloss; in the comparative example 2, the ink of the preparation comparative example 6 is adopted, and the ink of the preparation comparative example 6 does not contain the wear-resistant color retention filler, so that the glossiness, wear resistance, solvent resistance, water resistance and the like of a printed matter are reduced, meanwhile, the glossiness after baking in an oven is reduced from 90.3% to 75.2%, the glossiness is reduced by 25.1%, and the glossiness is greatly reduced, so that the addition of the wear-resistant color retention filler can play a good role in retaining color and improving glossiness; in contrast, the printed matter obtained in comparative example 3 using the commercially available ink was significantly inferior in glossiness, and was not abrasion-resistant, solvent-resistant, water-resistant, etc., and also not good in color retention effect.

The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.

Claims

1. The printing process of the environment-friendly printing ink is characterized by comprising the following steps of:

aqueous ink: 80-100 parts

Wear-resistant color-preserving filler: 25-35 parts

Diffusion agent: 0.5-1 part;

the water-based ink is prepared from water-based acrylic resin emulsion and polyurethane acrylic emulsion in a weight ratio of 3-5:1, the composition is as follows;

the wear-resistant color-preserving filler consists of wear-resistant filler and connecting color-preserving material in a weight ratio of 1:3-5;

the wear-resistant filler is prepared from the following raw materials in parts by weight:

white carbon black 5-10 parts

3-8 parts of shell powder

2-5 parts of mica powder

1.5-2.5 parts of coupling agent;

the connection color retention material is prepared from the following raw materials in parts by weight:

15-20 parts of xanthan gum mother liquor with mass fraction of 1-3%

Sodium carboxymethylcellulose 0.5-1 part

0.5-0.8 part of hydroxyethyl cellulose

3-5 parts of light stabilizer

20-30 parts of water;

the light stabilizer is prepared by the following steps:

weighing 1-2 parts of light stabilizer 1130, 1-3 parts of chitosan and 5-10 parts of water according to parts by weight, and stirring for 10-20min to obtain the light stabilizer;

the wear-resistant color-preserving filler is prepared by the following steps:

preparing wear-resistant color-preserving filler: weighing the wear-resistant filler and the connecting color retention material according to the weight ratio of 1:3-5, and uniformly stirring to obtain the wear-resistant color retention filler;

the dispersing agent is one or more of polyethylene glycol, peregal and aqueous dispersing agent SN-5040;

the toner is one of silver powder, iron oxide red, iron oxide yellow, carbon black, phthalocyanine blue and phthalocyanine green;

the environment-friendly ink is prepared by the following steps:

2. The printing ink of claim 1, which is prepared from the following raw materials in parts by weight: