CN112724736B

CN112724736B - Glass deinking method

Info

Publication number: CN112724736B
Application number: CN202011593082.7A
Authority: CN
Inventors: 王世军; 彭晓林; 陈建章; 丁雄风
Original assignee: Wanjin Industrial Chibi Co Ltd
Current assignee: Wanjin Industrial Chibi Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2022-06-03
Anticipated expiration: 2040-12-29
Also published as: CN112724736A

Abstract

The invention relates to a glass deinking method, which comprises the following steps: baking the glass to be deinked at 380-420 ℃ for 5-20 min, then placing the glass in a deinking agent, and carrying out deinking treatment at 40-65 ℃; the deinking agent comprises the following components: 0.5 to 2 weight percent of alkali, 0.3 to 2 weight percent of penetrating agent, 0.3 to 1 weight percent of dispersing agent, 0.1 to 0.3 weight percent of chelating agent, 0.1 to 0.3 weight percent of auxiliary agent, 0.3 to 2 weight percent of organic solvent and water. The deinking method of the invention firstly reduces the content of alkaline components in the deinking agent formula and simultaneously reduces the use temperature, so that the glass product does not generate obvious corrosion, the scratch number caused by deinking is controlled, and the glass product is baked before deinking treatment, thereby ensuring that excellent deinking effect can be still realized under the conditions of low alkaline substances and low temperature.

Description

Glass deinking method

Technical Field

The invention relates to the technical field of glass, in particular to a glass deinking method.

Background

In the production of glass panels such as mobile phones and tablet computers, ink printing or surface spraying treatment is generally required to be carried out on the glass panels, and when defective products are printed or sprayed, deinking treatment is carried out on the glass with poor ink coatings, so that the product yield and the enterprise profitability can be improved. Deinking treatment requires the use of a deinking agent, and in the field of optical glass, the deinking agent is widely varied and mainly divided into a solvent-based deinking agent, a semi-aqueous deinking agent and an aqueous deinking agent. At present, most of deinking agents used in deinking treatment in the industry use strong alkali or other substances with strong corrosion on glass as main agents, and the deinking agents generally need to be heated to about 90 ℃ in the use process, have too strong corrosion on glass, can cause a large amount of scratches on the surface of the glass, even have 20% of deep scratches which cannot be abraded after polishing in severe cases, and directly cause product scrapping. Other deinking agents used in an acidic environment can reduce glass scratches, but cannot treat oily substances on the surface of glass cleanly, and have the risk of concave and convex points if tempering is needed again.

Disclosure of Invention

Accordingly, there is a need for a glass deinking method with a low scratch rate and a good deinking effect.

A method of deinking glass comprising the steps of:

baking the glass to be deinked at 380-420 ℃ for 5-20 min, then placing the glass in a deinking agent, and carrying out deinking treatment at 40-65 ℃;

the deinking agent comprises the following components: 0.5 to 2 weight percent of alkali, 0.3 to 2 weight percent of penetrating agent, 0.3 to 1 weight percent of dispersing agent, 0.1 to 0.3 weight percent of chelating agent, 0.1 to 0.3 weight percent of auxiliary agent, 0.3 to 2 weight percent of organic solvent and water.

The deinking method of the invention firstly reduces the content of alkaline components in the deinking agent formula and reduces the use temperature, so that the glass product can not generate obvious corrosion in the deinking treatment process, thereby controlling the number of scratches caused by deinking. In the deinking agent used in the deinking method of the invention, a small amount of alkaline components can saponify the ink on the glass surface, the penetrating agent soaks to separate the ink from the glass surface, and the dispersing agent prevents dirt from being attached to the glass surface again, thereby achieving the deinking effect. And before deinking treatment by using the deinking agent, the glass product is baked for 5-20 min at 380-420 ℃, so that the deinking effect can be improved, and the excellent deinking effect can be still realized under the conditions of low-alkaline substances and low temperature. For poor silk-screen printing products, such as poor products such as edge penetration and oil overflow, if the poor products such as scratches are not generated in deinking, silk-screen printing can be directly performed again after deinking and cleaning, so that the procedures such as polishing, cleaning and tempering are reduced, the straight-through yield of products can be improved, and the production cost of enterprises is saved.

In one embodiment, the deinking agent comprises the following components: 1 to 1.5 weight percent of alkali, 0.5 to 1 weight percent of penetrating agent, 0.3 to 0.5 weight percent of dispersant, 0.1 to 0.2 weight percent of chelating agent, 0.1 to 0.2 weight percent of auxiliary agent, 0.8 to 1.5 weight percent of organic solvent and water.

In one embodiment, the base is one or more of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, and potassium ethoxide.

In one embodiment, the alkali comprises potassium carbonate and potassium hydroxide, and the mass ratio of the potassium carbonate to the potassium hydroxide is (0.06-0.3): 1.

In one embodiment, the penetrant is one or more of aminoethylpiperazine, sodium isooctanol polyoxyethylene ether phosphate and diisooctyl maleate sulfonate.

In one embodiment, the penetrant comprises aminoethylpiperazine and diisooctyl maleate sulfonate, and the mass ratio of aminoethylpiperazine to diisooctyl maleate sulfonate is (1-3): 1.

In one embodiment, the dispersant is one or more of polyacrylamide, sodium tripolyphosphate, and potassium pyrophosphate.

In one embodiment, the chelating agent is one or more of sodium citrate, disodium edetate and sodium gluconate.

In one embodiment, the chelating agent comprises disodium ethylene diamine tetraacetate and sodium gluconate, and the mass ratio of the disodium ethylene diamine tetraacetate to the sodium gluconate is (0.8-1.2): 1.

In one embodiment, the auxiliary agent is one or more of sodium silicate and sodium borate, and the organic solvent is one or more of ethylene glycol butyl ether, triethanolamine and styrene.

Detailed Description

In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention.

The glass deinking method of one embodiment of the present invention includes the steps of:

The electronic glass mainly comprises high aluminosilicate, the main component of the electronic glass is silicon dioxide which can react with strong alkali, and in the traditional deinking method, the deinking agent contains the strong alkali in too high a proportion, so that a glass product is easily scratched in a large quantity after deinking and cannot be worn off in serious conditions. In the deinking process under the acidic environment, although the glass can be prevented from being scratched in a large quantity, oily substances on the surface of the glass cannot be treated cleanly, and the risk of concave and convex points exists if tempering is needed. Therefore, it is difficult to ensure both a low scratch rate and an excellent deinking effect.

The deinking method of the invention firstly reduces the content of alkaline components in the deinking agent formula and reduces the use temperature, so that the glass product can not generate obvious corrosion in the deinking treatment process, thereby controlling the number of scratches caused by deinking. In the deinking agent used in the demolding method, a small amount of alkaline components can saponify the ink on the surface of the glass, the penetrating agent soaks the ink to separate the ink from the surface of the glass, and the dispersing agent prevents dirt from being attached to the surface of the glass again, so that the deinking effect is achieved. And before deinking treatment by using the deinking agent, the glass product is baked for 5-20 min at 380-420 ℃, thereby improving deinking effect and ensuring that excellent deinking effect can be still realized under low-alkaline substances and low-temperature conditions. For poor silk-screen printing products, such as poor products such as edge penetration and oil overflow, if the poor products such as scratches are not generated in deinking, silk-screen printing can be directly performed again after deinking and cleaning, so that the procedures such as polishing, cleaning and tempering are reduced, the straight-through yield of products can be improved, and the production cost of enterprises is saved.

In one particular example, the deinking agent includes the following components: 1 to 1.5 weight percent of alkali, 0.5 to 1 weight percent of penetrating agent, 0.3 to 0.5 weight percent of dispersant, 0.1 to 0.2 weight percent of chelating agent, 0.1 to 0.2 weight percent of auxiliary agent, 0.8 to 1.5 weight percent of organic solvent and water. When the alkaline component in the deinking agent is less than 1.0 wt%, oily substances on the surface of the glass are not easy to remove, and when the proportion of the alkaline component is more than 1.5wt%, the scratch ratio of the surface of the glass after deinking is increased to a certain extent; the proportion of the penetrating agent is preferably not less than 0.5wt%, the wetting action of the penetrating agent can enable the granular dirt or massive ink on the surface of the glass to be separated from the surface of the glass, and when the proportion of the penetrating agent in the deinking agent is lower, the ink on the surface of the glass is not easy to fall off.

In one particular example, the base is one or more of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, and potassium ethoxide. Preferably, the alkali comprises potassium carbonate and potassium hydroxide, and the mass ratio of the potassium carbonate to the potassium hydroxide is (0.06-0.3): 1, preferably (0.15-0.25): 1.

In one particular example, the osmotic agent is one or more of Aminoethylpiperazine (AEP), sodium isooctanol polyoxyethylene ether phosphate (OEP-70), and diisooctyl maleate sulfonate (fast osmotic agent T). Preferably, the penetrant comprises aminoethylpiperazine and diisooctyl maleate sulfonate, and the mass ratio of aminoethylpiperazine to diisooctyl maleate sulfonate is (1-3): 1.

In one particular example, the dispersant is one or more of polyacrylamide, sodium tripolyphosphate, and potassium pyrophosphate.

In one particular example, the chelating agent is one or more of sodium citrate, disodium edetate, and sodium gluconate. Preferably, the chelating agent comprises disodium ethylene diamine tetraacetate and sodium gluconate, and the mass ratio of the disodium ethylene diamine tetraacetate to the sodium gluconate is (0.8-1.2): 1.

In one particular example, the adjuvant is one or more of sodium silicate and sodium borate. In a specific example, the organic solvent is one or more of ethylene glycol butyl ether, triethanolamine and styrene, preferably ethylene glycol butyl ether or triethanolamine.

In one specific example, the preparation method of the deinking agent comprises the following steps: weighing a proper amount of water, adding the alkali, cooling to 35-45 ℃, adding the organic solvent, the auxiliary agent, the chelating agent, the penetrating agent and the dispersing agent, and uniformly stirring to obtain the deinking agent.

The present invention is further illustrated in detail by the following specific examples.

Example 1

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the table below.

Baking the glass to be deinked at 380 ℃ for 10min, then placing the glass in a deinking agent, and carrying out deinking treatment at 60 ℃ until the printing ink completely falls off.

Example 2

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the following table, and the difference from the example 1 is the mass percentage of the alkali.

Example 3

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the proportion are shown in the following table, and the difference from the embodiment 2 is the composition of the alkali.

Example 4

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the following table, and the difference from the example 3 is the mass percentage of the penetrating agent.

Example 5

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the following table, and the differences from the embodiment 3 are the components and the mass percentage of the penetrating agent.

Example 6

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the proportion are shown in the following table, and the difference from the example 5 is the deinking treatment temperature.

Baking the glass to be deinked at 380 ℃ for 10min, then placing the glass in a deinking agent, and carrying out deinking treatment at 50 ℃ until the printing ink completely falls off.

Example 7

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the following table, and the deinking agent is different from the deinking agent in example 1 in mass percentage.

Example 8

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the following table, and the difference from the example 1 is the mass percentage of the penetrating agent.

Example 9

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the proportion are shown in the following table, and the difference from the embodiment 5 is the composition of the alkali.

Example 10

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the proportion are shown in the following table, and the difference from the embodiment 5 is the composition of the chelating agent.

Example 11

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the proportion are shown in the following table, and the difference from the embodiment 5 is the composition of the penetrating agent.

Example 12

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the following table, and the difference from the example 5 is the composition of the dispersing agent.

Example 13

The difference from example 1 is mainly the baking temperature and the deinking temperature: baking the glass to be deinked at 420 ℃ for 5min, then placing the glass in a deinking agent, and carrying out deinking treatment at 40 ℃ until the printing ink completely falls off.

Comparative example 1

This comparative example differs from example 1 in that a sea breeze company AK200 deinking agent was used, which was mainly composed of 30 wt% of potassium hydroxide, 5wt% of zinc acetate, 5wt% of heneicosic acid, 15 wt% of triethanolamine, 5wt% of alkylolamide phosphate, 30 wt% of isohexane glycol, and 10 wt% of water.

Baking the glass to be deinked at 380 ℃ for 10min, then placing the glass in a deinking agent, and carrying out deinking treatment at 100 ℃ until the printing ink completely falls off.

Comparative example 2

The difference between the comparative example and the example 1 is that the mountain wind improving scratch deinking agent WIN-456 mainly comprises 22 wt% of sodium hydroxide, 2wt% of sodium silicate, 2wt% of sodium gluconate, 16 wt% of ethylene glycol ethyl ether, 2wt% of ethylene glycol, 3wt% of fatty alcohol-polyoxyethylene ether and 53 wt% of water.

Baking the glass to be deinked at 380 ℃ for 10min, then placing the glass in a deinking agent, and carrying out deinking treatment at 80 ℃ until the printing ink completely falls off.

Comparative example 3

This comparative example differs from example 1 in that a deinking agent consisting of the following components was used: 30 wt% of titanium dioxide, 15 wt% of humic acid, 5wt% of sodium gluconate, 30 wt% of DMC and 20 wt% of water.

Comparative example 4

This comparative example differs from example 1 in that a deinking agent consisting of the following components was used: 20 wt% of potassium hydroxide, 3wt% of triethanolamine borate, 2wt% of acetone-condensed glycerol, 18 wt% of glycerol, 3.2 wt% of isooctanol ether phosphate, 6.8 wt% of monoethanolamine and the balance of water.

Comparative example 5

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the table.

The difference from example 1 is that the glass to be deinked is not baked and is placed directly in a deinking agent and deinked at 60 ℃ until the ink is completely removed.

Comparative example 6

The difference from example 1 is the baking temperature: baking the glass to be deinked at 350 ℃ for 10min, then placing the glass in a deinking agent, and carrying out deinking treatment at 60 ℃ until the printing ink completely falls off.

Comparative example 7

The difference from example 1 is the deinking temperature: baking the glass to be deinked at 380 ℃ for 10min, then placing the glass in a deinking agent, and carrying out deinking treatment at 30 ℃ until the printing ink completely falls off.

Comparative example 8

The difference from example 1 is the deinking temperature: baking the glass to be deinked at 380 ℃ for 10min, then placing the glass in a deinking agent, and carrying out deinking treatment at 80 ℃ until the printing ink completely falls off.

Comparative example 9

Weighing a proper amount of water, adding alkali, cooling to 40 ℃, adding an organic solvent, an auxiliary agent, a chelating agent, a penetrating agent and a dispersing agent, and uniformly stirring to obtain the deinking agent, wherein the specific components and the ratio are shown in the table, and the deinking agent is different from the deinking agent in example 1 in mass percentage.

Comparative example 10

The deinking completion time of each of the above examples and comparative examples was measured, i.e., a timer was started when the glass to be deinked was put into the deinking agent until the ink was completely removed (i.e., whether or not the particles remained on the glass surface was confirmed by the strong flashlight irradiation). The above examples and comparative examples were tested for scratch number, i.e., after deinking, rinsing with pure water, oven drying, and then the scratch number was confirmed by inspection by a stationary worker. The test results are shown in the following table.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of deinking glass comprising the steps of:

the deinking agent comprises the following components: 1-1.5 wt% of alkali, 0.5-1 wt% of penetrating agent, 0.3-0.5 wt% of dispersing agent, 0.1-0.2 wt% of chelating agent, 0.1-0.2 wt% of auxiliary agent, 0.8-1.5 wt% of organic solvent and water;

the alkali is one or more of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate and potassium ethoxide, the penetrating agent is one or more of aminoethyl piperazine, isooctanol polyoxyethylene ether sodium phosphate and maleic acid diisooctyl ester sulfonate, the dispersing agent is one or more of polyacrylamide, sodium tripolyphosphate and potassium pyrophosphate, the chelating agent is one or more of sodium citrate, disodium ethylene diamine tetraacetate and sodium gluconate, and the auxiliary agent is one or more of sodium silicate and sodium borate.

2. The glass deinking method according to claim 1, wherein the alkali comprises potassium carbonate and potassium hydroxide, and the mass ratio of the potassium carbonate to the potassium hydroxide is (0.06-0.3): 1.

3. The glass deinking method according to claim 1, wherein the alkali comprises potassium carbonate and potassium hydroxide, and the mass ratio of the potassium carbonate to the potassium hydroxide is (0.15-0.25): 1.

4. The glass deinking method according to claim 1, wherein the penetrant comprises aminoethylpiperazine and diisooctyl maleate sulfonate, and the mass ratio of aminoethylpiperazine to diisooctyl maleate sulfonate is (1-3): 1.

5. The glass deinking method according to claim 1, wherein said organic solvent is ethylene glycol butyl ether.

6. The glass deinking method according to claim 1, wherein the chelating agent comprises disodium ethylenediaminetetraacetate and sodium gluconate, and the mass ratio of the disodium ethylenediaminetetraacetate to the sodium gluconate is (0.8-1.2): 1.

7. The glass deinking method as claimed in claim 1, wherein said deinking agent comprises the following components: 1.5wt% of alkali, 0.6wt% of penetrating agent, 0.4wt% of dispersing agent, 0.1wt% of chelating agent, 0.1wt% of auxiliary agent, 0.8wt% of organic solvent and water;

the alkali is potassium hydroxide or potassium carbonate and potassium hydroxide in a mass ratio of 0.2:1, the penetrating agent is aminoethylpiperazine and diisooctyl maleate sulfonate in a mass ratio of 2:1, the dispersing agent is polyacrylamide, the chelating agent is sodium gluconate, and the auxiliary agent is sodium silicate.

8. The glass deinking method as claimed in claim 1, wherein said deinking agent comprises the following components: 1.5wt% of alkali, 0.6wt% of penetrating agent, 0.4wt% of dispersing agent, 0.1wt% of chelating agent, 0.1wt% of auxiliary agent, 0.8wt% of organic solvent and water;

the alkali is potassium hydroxide, the penetrating agent is selected from aminoethylpiperazine and diisooctyl maleate sulfonate with the mass ratio of 2:1, the dispersing agent is polyacrylamide, the chelating agent is ethylene diamine tetraacetic acid and sodium gluconate with the mass ratio of 1:1, and the auxiliary agent is sodium silicate.

9. The glass deinking method according to claim 1, characterized in that the deinking agent comprises the following components: 1.5wt% of alkali, 0.6wt% of penetrating agent, 0.4wt% of dispersing agent, 0.1wt% of chelating agent, 0.1wt% of auxiliary agent, 0.8wt% of organic solvent and water;

the alkali is potassium hydroxide, the penetrating agent is selected from amino ethyl piperazine and isooctanol polyoxyethylene ether sodium phosphate with the mass ratio of 2:1, the dispersing agent is polyacrylamide, the chelating agent is sodium gluconate, and the auxiliary agent is sodium silicate.

10. The glass deinking method as claimed in claim 1, wherein said deinking agent comprises the following components: 1.5wt% of alkali, 0.6wt% of penetrating agent, 0.4wt% of dispersing agent, 0.1wt% of chelating agent, 0.1wt% of auxiliary agent, 0.8wt% of organic solvent and water;

the alkali is potassium hydroxide, the penetrating agent is selected from aminoethyl piperazine and diisooctyl maleate sulfonate with the mass ratio of 2:1, the dispersing agent is sodium tripolyphosphate, the chelating agent is sodium gluconate, and the auxiliary agent is sodium silicate.