CN106592325A - Multifunctional protective liquid for paper-based material printed matters and application - Google Patents

Abstract

The invention discloses a multifunctional protective liquid for printed matter of paper-based materials, which consists of the following components in terms of mass percentage: 0.2-2.0% of nano oxides, 0.01-1.0% of dispersants, 1.0-5.0% of cellulose organic matter, and 92.9% of solvents ~98.79%, the sum of the mass percentages of the above components is 100%. Its application method: mix the nano-oxide dispersion liquid and the cellulose organic matter solution evenly, and directly coat it on the surface of the paper print; or first coat the cellulose organic matter solution on the surface of the paper print, and then The printed matter is placed in the air to dry naturally and then coated with the dispersion of nano oxides. The multifunctional protective liquid for paper-based printed matter of the present invention uses nano-oxides, cellulose organic matter, dispersants, and solvent ethanol as main raw materials to obtain a multi-functional protective liquid coating for printed matter of paper-based materials. The formula is simple and easy to implement, and it is environmentally friendly and non-toxic , The effect of pre-protection on paper printed matter is better.

Description

A kind of multifunctional protective liquid for printed matter of paper-based materials and its application

technical field

The invention belongs to the technical field of protection of paper-based printed matter, and in particular relates to a multifunctional protective liquid for printed matter of paper-based materials, and also relates to the application of the protective liquid.

Background technique

Since the invention of printing, printed matter has played the role of an important cultural information transmission medium for human beings. At present, as one of the carriers of human spiritual food, it also plays an irreplaceable role in meeting people's growing spiritual life needs, especially personalized color printed matter. Usually, after being placed for a long time, printed matter will be affected by factors such as temperature, light, humidity, etc., and it is easy to turn yellow and become brittle, which will affect its use, viewing and preservation value. Especially paper artworks are sensitive to the external environment and need to be protected from ultraviolet radiation, visible light, air pollutants, fungi and bacteria, etc. Preventive conservation is an important aspect of museum policy and collection conservation, and it is essential to create and maintain an atmosphere of conservation in order to preserve collections.

As a new type of multifunctional material, nano-oxides are not only different from microscopic systems such as molecules and atoms, but also different from general powders. They are mesoscopic systems with several new properties. Their physical and chemical properties are similar to those of bulk materials. Significant differences. Due to its small particle size, large specific surface area and specific surface energy, the number of surface atoms accounts for a large proportion, so surface effects, small size effects, quantum size effects, macroscopic quantum tunneling effects, etc. appear, and derived from this Such as reduction of phase transition temperature and melting point, enhancement of adsorption capacity and catalytic activity, etc. Similarly, nanoscale oxides have good ultraviolet shielding properties, transparency to visible light, photocatalytic activity, and supersurface amphiphilic properties, which expand the application fields of nanoscale oxides. However, the strong photocatalytic activity of nano-oxides will affect the performance of the loaded objects, so it must be surface treated to reduce its photocatalytic performance and improve its dispersion performance in organic solvents.

In recent years, nano-oxides have been widely used in rubber, plastics, ink, coatings and other industries, but there are few applications in the pre-protection of paper printed products.

Contents of the invention

The purpose of the present invention is to provide a multifunctional protective liquid for printed matter of paper-based materials, which has a significant effect on improving the photothermal aging of paper and printed matter.

Another object of the present invention is to provide the application of the above-mentioned multifunctional protective liquid for printed matter of paper-based materials.

The technical solution adopted in the present invention is a multifunctional protective liquid for printed matter of paper-based materials, which is composed of the following components by mass percentage: 0.2-2.0% of nano-oxides, 0.01-1.0% of dispersants, and 1.0-1.0% of cellulose organic matter 5.0%, solvent 92.9-98.79%, and the sum of the mass percentages of the above components is 100%.

The present invention is also characterized in that,

The nano oxide is nano TiO ₂ , ZnO, SiO ₂ or MgO.

The dispersant is Tween-80, sodium hexametaphosphate, polyethylene glycol, sodium dodecylbenzenesulfonate or dodecylbenzenesulfonic acid.

Cellulosic organic matter is hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, cellulose acetate, carboxymethyl cellulose or cellulose acetate butyrate.

The solvent is absolute ethanol, butanol or propanol.

Another technical solution adopted in the present invention is the application method of the multifunctional protective liquid for printed matter of paper-based materials, which is specifically implemented according to the following steps:

Step 1, weigh the following components according to mass percentage: nano oxide 0.2-2.0%, dispersant 0.01-1.0%, cellulose organic matter 1.0-5.0%, solvent 92.9-98.79%, the sum of the mass percentages of the above components is 100%;

Step 2, mixing the nano-oxide with a part of the solvent, adding a dispersant, and then ultrasonically dispersing to obtain a dispersion of the nano-oxide;

Step 3, heating the remaining solvent to the dissolution temperature of the cellulose-based organic matter, adding the cellulose-based organic matter while stirring until dissolved, and obtaining a cellulose-based organic matter solution;

Step 4, mixing the nano oxide dispersion obtained in step 2 with the cellulose organic solution obtained in step 3, stirring evenly, and directly coating the surface of the paper print;

Alternatively, first coat the cellulose organic matter solution obtained in step 3 on the surface of the paper print, place the paper print in the air to dry naturally, and then coat the nano-oxide dispersion obtained in step 2.

The present invention is also characterized in that,

In step 1, the nano oxide is nano TiO ₂ , ZnO, SiO ₂ or MgO; the dispersant is Tween-80, sodium hexametaphosphate, polyethylene glycol, sodium dodecylbenzenesulfonate or dodecylbenzene Sulfonic acid; Cellulosic organic matter is hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, cellulose acetate, carboxymethyl cellulose or cellulose acetate butyrate; solvent is absolute ethanol, butanol or propanol.

The time for ultrasonic dispersion in step 2 is 10-25 minutes.

In step 3, the stirring speed is 1000-1400 rpm, and the stirring time is 60-120 min.

In step 4, the stirring time is 30-60 minutes, and the stirring speed is 1000-1400 rpm.

The beneficial effect of the present invention is that the multifunctional protective liquid for paper-based printed matter of the present invention uses nano-oxides, cellulose organic matter, dispersants, and solvent ethanol as main raw materials to obtain a multi-functional protective liquid coating for printed matter of paper-based materials. Simple and easy to operate, environmentally friendly and non-toxic, and has a good pre-protection effect on paper printed products.

The multifunctional protective liquid for printed matter of paper-based materials of the present invention first uses a dispersant to disperse the nano-oxides to improve the dispersion stability of the nano-oxides in the protective liquid, and then adopts the method of direct blending coating or layered coating with the Cellulose organic matter is coated to form a stable and uniform nano-oxide-cellulose organic matter protective liquid system. Due to the excellent similar compatibility between cellulose organic matter and paper fibers, and when it is coated on the surface of paper, it has good ductility and flexibility, and because it also has certain anti-aging properties, Thereby effectively improving the strength of paper prints, isolating outside air and pollutants to a certain extent, and having a good effect on the pre-protection of paper prints. At the same time, due to the existence of nano-oxides, it has a certain shielding effect on the ultraviolet rays in sunlight, and the unique photocatalytic properties of nano-oxides will have a certain antibacterial effect on paper printed products, thereby achieving antibacterial effects on paper. The role of pre-protection of printed matter.

Description of drawings

Figure 1 is the effect of different coating methods on the tensile strength of paper before and after aging;

Figure 2 shows the cyan (C) color difference △E before and after aging in different coating methods;

Figure 3 shows the color difference △E of magenta (M) before and after aging in different coating methods;

Figure 4 shows the yellow (Y) color difference ΔE before and after aging in different coating methods;

Figure 5 shows the black (K) color difference ΔE before and after aging in different coating methods.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The multifunctional protective liquid for printed matter of paper-based materials of the present invention is composed of the following components by mass percentage: 0.2-2.0% of nano oxides, 0.01-1.0% of dispersants, 1.0-5.0% of cellulose organic matter, 92.9-98.79% of solvents, The sum of the mass percentages of the above components is 100%.

The nano oxide is nano TiO ₂ , ZnO, SiO ₂ or MgO; the dispersant is Tween-80, sodium hexametaphosphate, polyethylene glycol, sodium dodecylbenzenesulfonate or dodecylbenzenesulfonic acid; The cellulose organic matter is hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, cellulose acetate, carboxymethyl cellulose or cellulose acetate butyrate; the solvent is absolute ethanol, butanol or propanol.

The preparation method of the multi-functional protective liquid for paper printed products includes firstly mixing the nano-oxide with a part, adding a dispersant, and then ultrasonically dispersing, and the dispersion time is 10-25 minutes to obtain a dispersion liquid of the nano-oxide.

Heat the remaining solvent to the dissolution temperature of the cellulose organic matter, and gradually add the cellulose organic matter until it dissolves under the condition of high-speed stirring, the stirring speed is 1000-1400 rpm, and the stirring time is 60-120 minutes to obtain the cellulose organic solution.

The application method of the multifunctional protective liquid for paper-based material printed matter of the present invention is divided into two types: one is a mixed coating method, and the mixed coating method directly mixes the dispersion liquid of nano-oxides with the cellulose organic matter solution at room temperature, Mix evenly by stirring and dispersing. The stirring speed is 1000-1400 rpm, and the stirring time is 30-60 minutes. It is directly coated on the surface of paper prints. The amount of coating is based on the complete soaking of the paper. The coating method Apply by spraying with high-pressure spray gun, dipping, coater or sizer. The second is the layered coating method. First, the cellulose organic matter solution is coated on the surface of the paper print, and the paper print is placed in the air to dry naturally for 30 to 60 minutes, and then the dispersion of nano-oxide is coated. , the amount of coating is based on the complete soaking of the paper, and the coating method uses high-pressure spray gun spraying, dipping, coating machine or sizing machine for coating.

Example 1

1) Preparation method:

Add 0.4g of nano-titanium dioxide to 47.58g of absolute ethanol, and add 0.02g of Tween-80, and ultrasonically disperse for 15 minutes to obtain a dispersion of nano-titanium dioxide; take another 50g of absolute ethanol, heat it to 60°C, and add it while stirring 2.0 g of hydroxypropyl cellulose, the stirring speed is 1200 rpm, and the stirring time is 100 minutes, so that the hydroxypropyl cellulose is completely dissolved.

2) Application method:

The hydroxypropyl cellulose solution obtained in 1) is coated on the surface of the paper print, and after it is completely dry, the nano titanium dioxide dispersion is coated thereon. Coating method Use a laboratory sizing machine to coat the surface of the printed matter and let it dry naturally.

Example 2

1) Preparation method:

Add 0.4g of nano-titanium dioxide to 47.58g of absolute ethanol, and add 0.02g of Tween-80, and ultrasonically disperse for 15 minutes to obtain a dispersion of nano-titanium dioxide; take another 50g of absolute ethanol, heat it to 60°C, and add it while stirring 2.0 g of hydroxypropyl cellulose, the stirring speed was 1200 rpm, and the stirring time was 100 minutes to obtain a hydroxypropyl cellulose solution.

The nano-titanium dioxide dispersion liquid is directly mixed with the hydroxypropyl cellulose solution, and the mixture is uniformly dispersed by stirring, the stirring speed is 1200 rpm, and the stirring time is 40 minutes, and the protective liquid is obtained.

2) Application method:

Apply the protective solution obtained in 1) on the surface of the printed matter using a laboratory sizing machine, and let it dry naturally.

Example 3

1) Preparation method:

Add 0.2g of nano-zinc dioxide to 45g of absolute ethanol, and add 0.8g of sodium hexametaphosphate, ultrasonically disperse for 10 minutes to obtain a nano-zinc dioxide dispersion; take another 50g of absolute ethanol, heat it to 60°C, and Add 4.0 g of hydroxypropyl methylcellulose while stirring, the stirring speed is 1000 rpm, and the stirring time is 120 minutes, so that the hydroxypropyl methylcellulose is completely dissolved.

2) Application method:

The hydroxypropyl methylcellulose solution obtained in 1) is coated on the surface of the paper print, and after it is completely dried, the nanometer zinc dioxide dispersion is coated thereon. Coating method Use a laboratory sizing machine to coat the surface of the printed matter and let it dry naturally.

Example 4

1) Preparation method:

Add 2.0g of nano-silica to 45g of butanol, add 0.6g of polyethylene glycol, and disperse with ultrasonic waves for 25 minutes to obtain a dispersion of nano-silica; take another 49.4g of butanol, heat and keep it warm to 60°C, and stir While adding 3.0 g of hydroxyethyl cellulose, the stirring speed was 1400 rpm, and the stirring time was 60 minutes, so that the hydroxyethyl cellulose was completely dissolved.

2) Application method:

Coat the hydroxyethyl cellulose solution obtained in 1) on the surface of the paper print, wait for it to dry completely, and then coat the nano-silica dispersion on it. Coating method Use a laboratory sizing machine to coat the surface of the printed matter and let it dry naturally.

Example 5

1) Preparation method:

Add 2.0g of nano-magnesium dioxide to 43.58g of propanol, and add 0.1g of sodium dodecylbenzenesulfonate, ultrasonically disperse for 20 minutes to obtain a dispersion of nano-magnesium dioxide; take another 49.32g of propanol, heat and keep it until 60°C, add 5.0 g of cellulose acetate while stirring, the stirring speed is 1300 rpm, and the stirring time is 80 minutes, so that the cellulose acetate is completely dissolved.

The nano-magnesium dioxide dispersion liquid is directly mixed with the cellulose acetate solution, and the mixture is uniformly dispersed by stirring, the stirring speed is 1400 rpm, and the stirring time is 30 minutes, and the protective solution is obtained.

2) Application method:

Apply the protective solution obtained in 1) on the surface of the printed matter using a laboratory sizing machine, and let it dry naturally.

Example 6

1) Preparation method:

Add 1.2g of nano-titanium dioxide to 48.79g of absolute ethanol, and add 0.01g of dodecylbenzenesulfonic acid, and ultrasonically disperse for 20 minutes to obtain a dispersion of nano-titanium dioxide; Add 1.0 g of hydroxymethylcellulose while stirring, the stirring speed is 1100 rpm, and the stirring time is 90 minutes, so that the hydroxymethylcellulose is completely dissolved.

Directly blend the nano-titanium dioxide dispersion liquid with the hydroxymethyl cellulose solution, stir and disperse to make them evenly mixed, the stirring speed is 1000 rpm, and the stirring time is 60 minutes to obtain the protection liquid.

2) Application method:

Apply the protective solution obtained in 1) on the surface of the printed matter using a laboratory sizing machine, and let it dry naturally.

The characteristics of the protective solution of the present invention are further described below,

(1) Paper print sample preparation:

Take the drawing paper, and cut the paper into a size of 160mm×270mm after balancing the moisture in a constant temperature and humidity room. Select GAFT company's special standard ladder ruler as the test table, edit and make CMYK color blocks with different dot areas (100%, 80%, 60%, 40%, 20%, 10%, 0%) with PhotoshopCS5 image processing software. Inkjet printing on drawing paper. The coating adopts the bar coating method. After coating, the paper sample is volatilized and air-dried at room temperature and pressure, and then stored for analysis and detection.

(2) Performance test:

The samples of paper prints (0 ^# ), coated with nano-titanium dioxide (1 ^# ), and coated with hydroxypropyl cellulose solution (2 ^# ) were used as comparison samples. It was compared with paper printed matter coated with multifunctional protective liquid (3 ^# ) and directly coated with multifunctional protective liquid (4 ^# ).

a) Strength performance: Uncoated protective solution (0 ^# ), coated with nano-titanium dioxide (1 ^# ), coated with hydroxypropyl cellulose solution (2 ^# ) and layered with multifunctional protective solution (3 ^# ) , Directly coated with multi-functional protective liquid (4 ^# ), the paper is put into the anti-yellowing test machine, after the aging time is 24h, 48h, 72h, 100h, the paper is placed at a temperature of 23±1°C and a relative humidity of 50±2% The constant temperature and humidity chamber was balanced for 24h to measure the tensile strength of the paper according to the ISO standard method.

Figure 1 is a diagram of the influence of different coating methods on the tensile strength of paper before and after aging, in which 0 ^# , 1 ^# , 2 ^# , 3 ^# , 4 ^# coated samples are compared, and the paper's Tensile strength is also differentiated. Generally speaking, the tensile strength of the paper sample layered with hydroxypropyl cellulose solution is higher than that of the other two paper samples, indicating that hydroxypropyl cellulose plays the role of reinforcing agent in the paper sample. Effect; with the prolongation of aging time, the tensile strength decreases, among which the tensile strength of 3 ^# paper sample and 4 ^# paper sample decreases less, and when the aging time reaches 100h, the tensile strength is also high on uncoated paper samples. From the above analysis, it can be concluded that the paper strength of layered coating and direct coating of multi-functional protective liquid has a slow decline trend with the prolongation of aging time, which is better than the other three groups of comparison samples.

b) Anti-yellowing property of printed matter: uncoated paper printed matter (0 ^# ), coated with nano-titanium dioxide (1 ^# ), coated with hydroxypropyl cellulose solution (2 ^# ) and layered Put the paper printed matter coated with multi-functional protective liquid (3 ^# ) or directly coated with multi-functional protective liquid (4 ^# ) into the anti-yellowing testing machine. After the aging time is 24h, 48h, 72h, 100h, measure the printing The Lab value of the color block, and calculate the color difference value before and after aging according to its Lab value. The change in color difference represents the yellowing resistance of the printed product, the smaller the color difference, the better the yellowing resistance.

Figure 2 is the cyan (C) color difference △E diagram before and after aging in different coating methods, Figure 3 is the magenta (M) color difference △E diagram before and after aging in different coating methods, and Figure 4 is the yellow (Y) color difference before and after aging in different coating methods Color difference △E diagram, Figure 5 is the black (K) color difference △E diagram before and after aging in different coating methods, analyze the above diagram, and compare 0 ^# , 1 ^# , 2 ^# , 3 ^# coated samples, with aging With the prolongation of time, the color difference of layered coating multi-functional protective liquid (3 ^# ) is smaller, and the average color difference is 2.72, 1.81, 2.54, 2.21. Compared with the other three groups, the color difference is reduced, and the protection of The base paper and printed characters of paper printed products have a good inhibitory effect on photothermal aging.

Among them, 0 ^# , 1 ^# , 2 ^# , and 4 ^# coated samples were compared. With the prolongation of the aging time, the color difference of the sample (4 ^# ) directly coated with protective liquid was smaller, and the average color difference was 2.28 and 1.66 respectively. , 2.43, 1.77, compared with the other three groups, the chromatic aberration is reduced, the base paper and printed characters of paper printed products are protected to a large extent, and it has a good inhibitory effect on photothermal aging.

Claims (10)

1. a kind of paper base material leaflet multifunction protection liquid, it is characterised in that composed of the following components by mass percentage：Receive Rice oxide 0.2～2.0%, dispersant 0.01～1.0%, cellulose family Organic substance 1.0～5.0%, solvent 92.9～ 98.79%, said components mass percent sum is 100%.

2. paper base material leaflet multifunction protection liquid according to claim 1, it is characterised in that the nano-oxide For nano-TiO₂、ZnO、SiO₂Or MgO.

3. paper base material leaflet multifunction protection liquid according to claim 1, it is characterised in that the dispersant is to tell Temperature -80, sodium hexameta phosphate, Polyethylene Glycol, dodecylbenzene sodium sulfonate or DBSA.

4. paper base material leaflet multifunction protection liquid according to claim 1, it is characterised in that the cellulose family has Machine thing is hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, cellulose acetate, carboxymethyl cellulose or vinegar Sour cellulose butyrate.

5. paper base material leaflet multifunction protection liquid according to claim 1, it is characterised in that the solvent is anhydrous Ethanol, butanol or propanol.

6. the application process according to the arbitrary described paper base material leaflet multifunction protection liquid of Claims 1 to 5, its feature exist In specifically according to following steps enforcement：

Step 1, weighs following components by mass percentage respectively：Nano-oxide 0.2～2.0%, dispersant 0.01～ 1.0%, cellulose family Organic substance 1.0～5.0%, solvent 92.9～98.79%, said components mass percent sum is 100%；

Step 2, adds dispersant after nano-oxide is mixed with partial solvent, then carry out ultrasonic disperse, obtain nano oxygen The dispersion liquid of compound；

Remaining solvent is heated to the solution temperature of cellulose family Organic substance by step 3, adds cellulose family organic while stirring Thing is until dissolving, obtains cellulose family organic solution；

Step 4, the cellulose family organic solution that dispersion liquid and the step 3 of the nano-oxide that step 2 is obtained are obtained mix, Stir, be directly coated on papery printing product surface；

Or the cellulose family organic solution for first obtaining step 3 is coated on papery printing product surface, and papery printing is positioned over The dispersion liquid of the nano-oxide that step 2 is obtained is coated with after spontaneously drying in air.

7. the application process of paper base material leaflet multifunction protection liquid according to claim 6, it is characterised in that step In 1, nano-oxide is nano-TiO₂、ZnO、SiO₂Or MgO；Dispersant be tween 80, sodium hexameta phosphate, Polyethylene Glycol, 12 Sodium alkyl benzene sulfonate or DBSA；Cellulose family Organic substance is hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxyl Ethyl cellulose, cellulose acetate, carboxymethyl cellulose or acetylbutyrylcellulose；Solvent is dehydrated alcohol, butanol or propanol.

8. the application process of paper base material leaflet multifunction protection liquid according to claim 6, it is characterised in that step In 2, the time of ultrasonic disperse is 10～25min.

9. the application process of paper base material leaflet multifunction protection liquid according to claim 6, it is characterised in that step 1000～1400 revs/min of mixing speed in 3, mixing time are 60～120min.

10. the application process of paper base material leaflet multifunction protection liquid according to claim 6, it is characterised in that step In rapid 4, mixing time is 30～60min, and mixing speed is 1000～1400 revs/min.