CN110590183A - Deplating liquid and deplating method for alkali-resistant protective ink on deplated glass - Google Patents
Deplating liquid and deplating method for alkali-resistant protective ink on deplated glass Download PDFInfo
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- CN110590183A CN110590183A CN201910910488.4A CN201910910488A CN110590183A CN 110590183 A CN110590183 A CN 110590183A CN 201910910488 A CN201910910488 A CN 201910910488A CN 110590183 A CN110590183 A CN 110590183A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/0075—Cleaning of glass
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/005—Chemical paint or ink removers containing organic solvents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/04—Chemical paint or ink removers with surface-active agents
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Abstract
The invention belongs to the technical field of deinking, and particularly relates to a deplating liquid and a deplating method for alkali-resistant protective printing ink on deplated glass. The deplating solution provided by the invention comprises: 8-12 wt% of potassium hydroxide; 6-15 wt% of diethylene glycol; 6-15 wt% of ethylene glycol ethyl ether; 6-10 wt% of ethylene glycol phenyl ether; 6-10 wt% of benzyl alcohol; 2-10 wt% of alcohol amine; 0.2-1 wt% of a surfactant; 0.1-1 wt% of alkyl glycoside; the balance of water. The stripping solution provided by the invention has stable property, strong removal force, difficult volatilization, difficult decomposition and strong endurance, and can not scratch and cause other defects to glass; the additive does not contain toxic substances such as sulfur, chlorine, benzene, heavy metals and the like; can effectively remove the alkali-resistant protective printing ink on the glass.
Description
Technical Field
The invention belongs to the technical field of deinking, and particularly relates to a deplating liquid and a deplating method for alkali-resistant protective printing ink on deplated glass.
Background
With the continuous acceleration of technological innovation speed, the style of the rear cover glass of the mobile phone is also continuously innovated. The sand blasting glass is highly favored by the market due to the variable patterns and surface effects, and is already applied to the manufacture of the rear cover glass of the mobile phone at present.
The preparation process of the sand blasting glass is various, and the current adopted common preparation process flow is as follows: firstly, the back surface of the glass is printed with alkali-resistant protective printing ink in a silk-screen mode, then the front surface of the glass is subjected to sand blasting, then chemical polishing is carried out, and finally the alkali-resistant protective printing ink is deplated in a groove type deplating machine filled with deplating liquid. However, the use effect of the existing stripping liquid is not ideal, so that not only can the alkali-resistant protective ink not fall off completely, but also the glass can have bad phenomena of scratching, bluing, fogging and the like.
Disclosure of Invention
In view of the above, the present invention aims to provide a stripping solution and a stripping method for stripping alkali-resistant protective ink on glass, the stripping solution provided by the present invention can rapidly and effectively strip the alkali-resistant protective ink on the glass, and the stripped glass has no scratch or other defects.
The invention provides a stripping solution for alkali-resistant protective printing ink on stripped glass, which comprises the following components in percentage by mass:
the total content of the diethylene glycol and the ethylene glycol ethyl ether in the deplating solution is 18-26 wt%;
the total content of the ethylene glycol phenyl ether and the benzyl alcohol in the deplating solution is 16-20 wt%;
wherein the potassium hydroxide plays a role in exfoliation in the present invention; the benzyl alcohol and the ethylene glycol phenyl ether are used for synergistically improving the solubility of the deplating solution in the invention; the ethylene glycol ethyl ether and diethylene glycol are used in the invention to synergistically improve the osmotic swelling property of the deplating solution; the alcohol amine is used in the invention to improve the alkalinity and permeability of the stripping solution; the surfactants and alkyl glycosides are used in the present invention to synergistically increase the permeability of the stripping solution; the water acts as a solvent in the present invention.
Preferably, the alcohol amine comprises one or more of monoethanolamine, diethanolamine, triethanolamine and isopropanolamine.
Preferably, the surfactant comprises isooctanol ether phosphate and/or fatty alcohol-polyoxyethylene ether.
The invention provides a deplating method, which comprises the following steps:
a) soaking the glass to be deplated with the alkali-resistant protective printing ink in the deplating solution in the technical scheme;
b) and taking the glass out of the deplating solution, and then washing and drying to obtain the glass without the alkali-resistant protective ink.
Preferably, in the step a), the soaking temperature is 85-95 ℃; the soaking time is 200-600 s.
Preferably, step a) specifically comprises:
and sequentially soaking the glass to be deplated with the alkali-resistant protective printing ink in a plurality of deplating tanks filled with the deplating liquid.
Preferably, the number of the deplating tanks is 3-6;
the residence time of the glass to be deplated with the alkali-resistant protective printing ink in each deplating tank is 80-100 s.
Preferably, in step b), the washing specifically comprises: and sequentially carrying out water washing, alkali washing and rinsing.
Preferably, in step b), the drying specifically comprises: and air drying and drying are sequentially carried out.
Preferably, the alkali-resistant protective ink comprises the following components in parts by weight:
compared with the prior art, the invention provides a deplating solution and a deplating method for the alkali-resistant protective ink on deplated glass. The deplating solution provided by the invention comprises: 8-12 wt% of potassium hydroxide; 6-15 wt% of diethylene glycol; 6-15 wt% of ethylene glycol ethyl ether; 6-10 wt% of ethylene glycol phenyl ether; 6-10 wt% of benzyl alcohol; 2-10 wt% of alcohol amine; 0.2-1 wt% of a surfactant; 0.1-1 wt% of alkyl glycoside; the balance of water; the total content of the diethylene glycol and the ethylene glycol ethyl ether in the deplating solution is 18-26 wt%; the total content of the ethylene glycol phenyl ether and the benzyl alcohol in the deplating solution is 16-20 wt%. The stripping solution provided by the invention has stable property, strong removal force, difficult volatilization, difficult decomposition and strong endurance, and can not scratch and cause other defects to glass; the additive does not contain toxic substances such as sulfur, chlorine, benzene, heavy metals and the like; can effectively remove the alkali-resistant protective printing ink on the glass.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a stripping solution for alkali-resistant protective printing ink on stripped glass, which comprises the following components in percentage by mass:
the total content of the diethylene glycol and the ethylene glycol ethyl ether in the deplating solution is 18-26 wt%;
the total content of the ethylene glycol phenyl ether and the benzyl alcohol in the deplating solution is 16-20 wt%.
The stripping solution provided by the invention comprises potassium hydroxide, diethylene glycol, ethylene glycol ethyl ether, ethylene glycol phenyl ether, benzyl alcohol, alcohol amine, a surfactant, alkyl glycoside (APG) and water. Wherein the content of the potassium hydroxide in the deplating solution is 8-12 wt%, and specifically 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt% or 12 wt%.
In the present invention, the content of the diethylene glycol in the deplating solution is 6 to 15 wt%, specifically 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt%, 12 wt%, 12.5 wt%, 13 wt%, 13.5 wt%, 14 wt%, 14.5 wt%, or 15 wt%.
In the present invention, the content of the ethylene glycol ethyl ether in the deplating solution is 6 to 15 wt%, specifically 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt%, 12 wt%, 12.5 wt%, 13 wt%, 13.5 wt%, 14 wt%, 14.5 wt%, or 15 wt%.
In the present invention, the total content of the diethylene glycol and the ethylene glycol ethyl ether in the deplating solution is 18 to 26 wt%, and specifically may be 18 wt%, 18.5 wt%, 19 wt%, 19.5 wt%, 20 wt%, 20.5 wt%, 21 wt%, 21.5 wt%, 22 wt%, 22.5 wt%, 23 wt%, 23.5 wt%, 24 wt%, 24.5 wt%, 25 wt%, 25.5 wt%, or 26 wt%.
In the invention, the content of the ethylene glycol phenyl ether in the deplating solution is 6 to 10 wt%, specifically 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt% or 10 wt%.
In the present invention, the content of the benzyl alcohol in the deplating solution is 6 to 10 wt%, specifically 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, or 10 wt%.
In the invention, the total content of the ethylene glycol phenyl ether and the benzyl alcohol in the deplating solution is 16-20 wt%, and specifically 16 wt%, 16.5 wt%, 17 wt%, 17.5 wt%, 18 wt%, 18.5 wt%, 19 wt%, 19.5 wt% or 20 wt%.
In the present invention, the alcohol amine preferably includes one or more of monoethanolamine, diethanolamine, triethanolamine and isopropanolamine; the content of the alcohol amine in the deplating solution is 2 to 10 wt%, specifically 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, or 10 wt%.
In the present invention, the surfactant preferably includes isooctanol ether phosphate and/or fatty alcohol-polyoxyethylene ether (JFC); the surfactant may be contained in the deplating solution in an amount of 0.2 to 1 wt%, specifically 0.2 wt%, 0.25 wt%, 0.3 wt%, 0.35 wt%, 0.4 wt%, 0.45 wt%, 0.5 wt%, 0.55 wt%, 0.6 wt%, 0.65 wt%, 0.7 wt%, 0.75 wt%, 0.8 wt%, 0.85 wt%, 0.9 wt%, 0.95 wt%, or 1 wt%.
In the present invention, the content of the Alkylglycoside (APG) in the deplating solution is 0.1 to 1 wt%, specifically 0.1 wt%, 0.15 wt%, 0.2 wt%, 0.25 wt%, 0.3 wt%, 0.35 wt%, 0.4 wt%, 0.45 wt%, 0.5 wt%, 0.55 wt%, 0.6 wt%, 0.65 wt%, 0.7 wt%, 0.75 wt%, 0.8 wt%, 0.85 wt%, 0.9 wt%, 0.95 wt%, or 1 wt%.
In the present invention, the method for preparing the deplating solution is not particularly limited, and the components may be uniformly mixed in proportion.
According to the invention, through the optimized design of the composition and the content of each component of the deplating solution, each performance of the deplating solution is obviously improved, the deplating solution takes water as a solvent, potassium hydroxide plays a role in stripping, benzyl alcohol and ethylene glycol phenyl ether are used for synergistically improving the solubility of the deplating solution, ethylene glycol ethyl ether and diethylene glycol are used for synergistically improving the osmotic swelling property of the deplating solution, alcohol amine is used for improving the alkalinity and the permeability of the deplating solution, and a surfactant and alkyl glycoside are used for synergistically improving the permeability of the deplating solution.
The deplating liquid provided by the invention has stable property, strong removing force, difficult volatilization, difficult decomposition and strong lasting force, and can not generate scratches and other defects on glass; the additive does not contain toxic substances such as sulfur, chlorine, benzene, heavy metals and the like; can effectively remove the alkali-resistant protective printing ink on the glass.
The invention also provides a deplating method, which comprises the following steps:
a) soaking the glass to be deplated with the alkali-resistant protective printing ink in the deplating solution in the technical scheme;
b) and taking the glass out of the deplating solution, and then washing and drying to obtain the glass without the alkali-resistant protective ink.
In the deplating method provided by the invention, firstly, the glass to be deplated with the alkali-resistant protective printing ink is soaked in a deplating solution. Wherein, the alkali-resistant protective ink refers to protective ink which can resist alkali polishing solution. In one embodiment provided by the present invention, the alkali-resistant protective ink comprises, by weight: 100 parts of epoxy resin, 5-15 parts of organosilicon modified epoxy resin, 5-15 parts of barium sulfate, 5-15 parts of talcum powder, 1-5 parts of coupling agent, 2-10 parts of pigment, 0.5-3 parts of defoaming agent, 0.1-1 part of dispersing agent, 0.1-1 part of flatting agent, 5-15 parts of amine curing agent and 6-10 parts of isophorone solvent. Wherein the epoxy designation preferably includes NPPN631 and/or NPPN638, which designations are available from south Asia epoxy Limited; the grade of the organic silicon modified epoxy resin preferably comprises GR-5002 and/or 023-7, the grade of the organic silicon modified epoxy resin GR-5002 is provided by Dongguan Nippon nanometer material Co., Ltd, the grade of the organic silicon modified epoxy resin 023-7 is provided by New four sea chemical engineering in Hubei, and the content of the organic silicon modified epoxy resin in the alkali-resistant protective ink can be specifically 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight or 15 parts by weight; the content of the barium sulfate in the alkali-resistant protective ink can be 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight or 15 parts by weight; the content of the talcum powder in the alkali-resistant protective ink can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts or 15 parts by weight; the grade of the coupling agent preferably comprises KH-560 and/or KH-570, and the content of the coupling agent in the alkali-resistant protective ink can be 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight or 5 parts by weight; the pigment is preferably a bazedoary blue K7090, and the content of the pigment in the alkali-resistant protective ink can be 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight or 10 parts by weight; the grade of the defoaming agent preferably comprises DQ-3132 and/or DQ-3130, the grade of the defoaming agent is provided by centuries macrographic chemical industry, and the content of the defoaming agent in the alkali-resistant protective ink can be specifically 0.5 part by weight, 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight or 3 parts by weight; the grade of the dispersant preferably comprises BYK-163, and the content of the dispersant in the alkali-resistant protective ink can be specifically 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, 0.7 part by weight, 0.8 part by weight, 0.9 part by weight or 1 part by weight; the grade of the leveling agent preferably comprises BYK-333, and the content of the leveling agent in the alkali-resistant protective printing ink can be specifically 0.1 part by weight, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, 0.7 part by weight, 0.8 part by weight, 0.9 part by weight or 1 part by weight; the amine curing agent preferably comprises a T-31 modified curing agent and/or a polyamide curing agent, and the content of the amine curing agent in the alkali-resistant protective ink can be 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight or 15 parts by weight. In the invention, the alkali-resistant protective ink is preferably arranged on the back surface of glass in a screen printing manner, the glass is preferably white glass, and the thickness of the screen printing is preferably 5-50 μm, and specifically may be 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm. In one embodiment provided by the invention, the glass printed with the alkali-resistant protective ink cannot be dissolved after being soaked in a mixed solution of 30 wt% of sodium hydroxide and 10 wt% of sodium gluconate at 100 ℃ for 2-5 hours.
In the deplating method provided by the invention, the temperature for soaking the glass to be deplated with the alkali-resistant protective printing ink in the deplating liquid is preferably 85-95 ℃, and specifically can be 85 ℃, 86 ℃, 87 ℃, 88 ℃, 89 ℃, 90 ℃, 91 ℃, 92 ℃, 93 ℃, 94 ℃ or 95 ℃; the soaking time is preferably 200-600 s, and specifically may be 200s, 210s, 220s, 230s, 240s, 250s, 260s, 270s, 280s, 290s, 300s, 310s, 320s, 330s, 340s, 350s, 360s, 370s, 380s, 390s, 400s, 410s, 420s, 430s, 440s, 450s, 460s, 470s, 480s, 490s, 500s, 510s, 520s, 530s, 540s, 550s, 560s, 570s, 580s, 590s or 600 s. In an embodiment provided by the present invention, the glass to be deplated with the alkali-resistant protective ink is preferably sequentially soaked in a plurality of deplating tanks containing the deplating solution, the number of the deplating tanks is preferably 3 to 6, and specifically may be 3, 4, 5, or 6, and the residence time of the glass to be deplated with the alkali-resistant protective ink in each deplating tank is preferably 80 to 100s, and specifically may be 80s, 85s, 90s, 95s, or 100 s.
In the deplating method provided by the invention, after the glass deplated with the alkali-resistant protective printing ink is soaked in the deplating solution, the glass is taken out of the deplating solution and washed. Wherein the washing process preferably comprises: and sequentially carrying out water washing, alkali washing and rinsing. In the present invention, the specific mode of the glass washing is preferably: putting the glass into a rinsing bath for spray washing; the water temperature of the spray washing is preferably 15-35 ℃, and specifically can be 15 ℃, 20 ℃, 25 ℃ (room temperature), 30 ℃ or 35 ℃; the residence time of the glass in the rinsing bath is preferably 80-100 s, and specifically can be 80s, 85s, 90s, 95s or 100 s. In the invention, the temperature of the alkali washing is preferably 50-70 ℃, and specifically can be 50 ℃, 55 ℃, 60 ℃, 65 ℃ or 70 ℃; the specific way of carrying out the alkali washing on the glass is preferably as follows: the glass is sequentially soaked in a plurality of alkaline washing grooves filled with alkaline washing agents, the number of the alkaline washing grooves is preferably 1-3, specifically 1, 2 or 3, and the residence time of the glass in each alkaline washing groove is preferably 80-100 s, specifically 80s, 85s, 90s, 95s or 100 s. In the present invention, the detergent used for the rinsing is pure water; the rinsing temperature is preferably 30-50 ℃, and specifically can be 30 ℃, 35 ℃, 40 ℃, 45 ℃ or 50 ℃; the specific manner in which the glass is subjected to said rinsing is preferably: the glass is sequentially soaked in a plurality of rinsing tanks containing pure water, the number of the rinsing tanks is preferably 3-8, specifically 3, 4, 5, 6, 7 or 8, and the residence time of the glass in each rinsing tank is preferably 40-80 s, specifically 40s, 45s, 50s, 55s, 60s, 65s, 70s, 75s or 80 s.
In the deplating method provided by the invention, after the glass is washed, the glass is dried. Wherein, the drying process preferably comprises: and air drying and drying are sequentially carried out. In the present invention, the condition parameters such as the specific temperature and time of the drying are not particularly limited, and the surface of the glass may be completely dried.
The method provided by the invention adopts the stripping liquid provided by the invention to strip the alkali-resistant protective ink on the glass, the alkali-resistant protective ink on the glass can be rapidly and effectively stripped, and the stripped glass has no scratch and other defects.
For the sake of clarity, the following examples are given in detail.
In the following examples and comparative examples of the invention, glasses to be deplated with alkali-resistant protective inks were obtained according to the following procedure:
firstly, the back of white glass (sixth generation glass produced by corning corporation) is silk-screened with alkali-resistant protective ink, the silk-screen thickness is 20 μm, and the alkali-resistant protective ink comprises the following components: 100 parts of epoxy resin (NPPN631), 10 parts of organosilicon modified epoxy resin (GR-5002), 10 parts of barium sulfate, 10 parts of talcum powder, 3 parts of coupling agent (KH-560), 5 parts of pigment (BASF phthalocyanine blue K7090), 1 part of defoaming agent (DQ-3132), 0.5 part of dispersing agent (BYK-163), 0.5 part of flatting agent (BYK-333), 10 parts of amine curing agent (T-31 modified curing agent) and 8 parts of isophorone;
then, sand blasting is performed on the front surface of the glass in a manner of physical impact of alumina.
And finally, chemically polishing the glass in a specific mode: the glass is soaked in a mixed solution of 30 wt% of sodium hydroxide and 10 wt% of sodium gluconate for 2h at 100 ℃.
In the following examples and comparative examples of the present invention, 5 wt% of alkaline cleaner used was diluted with alkaline cleaner whose components included: 25 wt% of potassium hydroxide, 5 wt% of sodium hydroxide, 8 wt% of sodium citrate, 5 wt% of sodium gluconate, 2 wt% of potassium pyrophosphate, 2 wt% of tetrasodium ethylenediamine tetraacetate, 1 wt% of APG, 1 wt% of 8390 surfactant and the balance of water.
Example 1
1) Stripping liquid:
mixing the raw materials according to the following mixture ratio: 10 wt% of potassium hydroxide, 10 wt% of diethylene glycol, 10 wt% of ethylene glycol ethyl ether, 8 wt% of ethylene glycol phenyl ether, 8 wt% of benzyl alcohol, 4 wt% of monoethanolamine, 0.4 wt% of isooctyl alcohol ether phosphate, 0.2 wt% of APG and the balance of water. And after uniform mixing, obtaining the deplating solution.
2) The deplating method comprises the following steps:
and sequentially treating the glass to be deplated with the alkali-resistant protective printing ink in 1-12 grooves, and then air-drying and drying to obtain the glass from which the alkali-resistant protective printing ink is removed.
Wherein, the 1-4 tanks are deplating tanks, the deplating solution is contained in the tanks, the temperature of the tanks is 90 ℃, and the residence time of the glass in each tank is 90 s; the 5 tank is a rinsing tank and is used for spraying and washing the glass, the washing temperature is room temperature, and the retention time of the glass in the 5 tank is 90 s; 6-7 grooves are alkaline washing grooves, alkaline washing agents (5 wt% of alkaline washing agents) are contained in the grooves, the temperature of the grooves is 60 ℃, and the residence time of the glass in each groove is 90 s; and the 8-12 tanks are rinsing tanks, pure water is filled in the tanks, the temperature of the tanks is 40 ℃, and the residence time of the glass in each tank is 60 s.
The glass from which the alkali-resistant protective ink is removed is observed, and the result is as follows: the alkali resistance protects the printing ink from falling off completely without residue, and the glass is not scratched, blued and fogged.
In addition, the boiling points of the components except water in the deplating solution provided by the embodiment are higher than 120 ℃, and the components are not easy to volatilize under the conditions of 10% alkalinity and the temperature of 85-95 ℃; the service life of the deplating liquid can reach 3-5 days and the endurance is strong.
Example 2
1) Stripping liquid:
mixing the raw materials according to the following mixture ratio: 12 wt% of potassium hydroxide, 8 wt% of diethylene glycol, 6 wt% of ethylene glycol ethyl ether, 6 wt% of ethylene glycol phenyl ether, 10 wt% of benzyl alcohol, 5 wt% of monoethanolamine, 0.6 wt% of isooctyl alcohol ether phosphate, 0.4 wt% of APG and the balance of water. And after uniform mixing, obtaining the deplating solution.
2) The deplating method comprises the following steps:
and sequentially treating the glass to be deplated with the alkali-resistant protective printing ink in 1-12 grooves, and then air-drying and drying to obtain the glass from which the alkali-resistant protective printing ink is removed.
Wherein, the 1-4 tanks are deplating tanks, the deplating solution is contained in the tanks, the temperature of the tanks is 90 ℃, and the residence time of the glass in each tank is 90 s; the 5 tank is a rinsing tank and is used for spraying and washing the glass, the washing temperature is room temperature, and the retention time of the glass in the 5 tank is 90 s; 6-7 grooves are alkaline washing grooves, alkaline washing agents (5 wt% of alkaline washing agents) are contained in the grooves, the temperature of the grooves is 60 ℃, and the residence time of the glass in each groove is 90 s; and the 8-12 tanks are rinsing tanks, pure water is filled in the tanks, the temperature of the tanks is 40 ℃, and the residence time of the glass in each tank is 60 s.
The glass from which the alkali-resistant protective ink is removed is observed, and the result is as follows: the alkali resistance protects the printing ink from falling off completely without residue, and the glass is not scratched, blued and fogged.
In addition, the boiling points of the components except water in the deplating solution provided by the embodiment are higher than 120 ℃, and the components are not easy to volatilize under the conditions of 10% alkalinity and the temperature of 85-95 ℃; the service life of the deplating liquid can reach 3-5 days and the endurance is strong.
Comparative example 1
1) Stripping liquid:
mixing the raw materials according to the following mixture ratio: 25 wt% of potassium hydroxide, 5 wt% of diethylene glycol, 12 wt% of tetrahydrofurfuryl alcohol, 2 wt% of sodium citrate, 4 wt% of triethanolamine and the balance of water. And after uniform mixing, obtaining the deplating solution.
2) The deplating method comprises the following steps:
and sequentially treating the glass to be deplated with the alkali-resistant protective printing ink in 1-12 grooves, and then air-drying and drying to obtain the glass from which the alkali-resistant protective printing ink is removed.
Wherein, the 1-4 tanks are deplating tanks, the deplating solution is contained in the tanks, the temperature of the tanks is 90 ℃, and the residence time of the glass in each tank is 150 s; the 5 tank is a rinsing tank and is used for spraying and washing the glass, the washing temperature is room temperature, and the retention time of the glass in the 5 tank is 150 s; 6-7 grooves are alkaline washing grooves, alkaline washing agents (5 wt% of alkaline washing agents) are contained in the grooves, the temperature of the grooves is 60 ℃, and the residence time of the glass in each groove is 150 s; and the 8-12 tanks are rinsing tanks, pure water is filled in the tanks, the temperature of the tanks is 40 ℃, and the residence time of the glass in each tank is 60 s.
The glass from which the alkali-resistant protective ink is removed is observed, and the result is as follows: the alkali resistance protects the ink from falling off incompletely, a small amount of residue exists, and the glass has scratches, blueness and fogging.
Comparative example 2
1) Stripping liquid:
mixing the raw materials according to the following mixture ratio: 4 wt% of potassium hydroxide, 18 wt% of diethylene glycol, 4 wt% of ethylene glycol ethyl ether, 4 wt% of benzyl alcohol, 4 wt% of ethylene glycol phenyl ether, 1 wt% of monoethanolamine, 0.1 wt% of isooctanol ether phosphate, 0.1 wt% of APG and the balance of water. And after uniform mixing, obtaining the deplating solution.
2) The deplating method comprises the following steps:
and sequentially treating the glass to be deplated with the alkali-resistant protective printing ink in 1-12 grooves, and then air-drying and drying to obtain the glass from which the alkali-resistant protective printing ink is removed.
Wherein, the 1-4 tanks are deplating tanks, the deplating solution is contained in the tanks, the temperature of the tanks is 90 ℃, and the residence time of the glass in each tank is 150 s; the 5 tank is a rinsing tank and is used for spraying and washing the glass, the washing temperature is room temperature, and the retention time of the glass in the 5 tank is 150 s; 6-7 grooves are alkaline washing grooves, alkaline washing agents (5 wt% of alkaline washing agents) are contained in the grooves, the temperature of the grooves is 60 ℃, and the residence time of the glass in each groove is 150 s; and the 8-12 tanks are rinsing tanks, pure water is filled in the tanks, the temperature of the tanks is 40 ℃, and the residence time of the glass in each tank is 60 s.
The glass from which the alkali-resistant protective ink is removed is observed, and the result is as follows: the alkali resistance protects the ink from falling incompletely and has a small amount of residue.
Comparative example 3
1) Stripping liquid:
mixing the raw materials according to the following mixture ratio: 25 wt% of sodium hydroxide, 10 wt% of diethylene glycol, 12 wt% of ethylene glycol ethyl ether, 2 wt% of benzyl alcohol, 2 wt% of ethylene glycol phenyl ether, 2 wt% of monoethanolamine, 0.1 wt% of isooctyl alcohol ether phosphate, 0.1 wt% of APG and the balance of water. And after uniform mixing, obtaining the deplating solution.
2) The deplating method comprises the following steps:
and sequentially treating the glass to be deplated with the alkali-resistant protective printing ink in 1-12 grooves, and then air-drying and drying to obtain the glass from which the alkali-resistant protective printing ink is removed.
Wherein, the 1-4 tanks are deplating tanks, the deplating solution is contained in the tanks, the temperature of the tanks is 90 ℃, and the residence time of the glass in each tank is 150 s; the 5 tank is a rinsing tank and is used for spraying and washing the glass, the washing temperature is room temperature, and the retention time of the glass in the 5 tank is 150 s; 6-7 grooves are alkaline washing grooves, alkaline washing agents (5 wt% of alkaline washing agents) are contained in the grooves, the temperature of the grooves is 60 ℃, and the residence time of the glass in each groove is 150 s; and the 8-12 tanks are rinsing tanks, pure water is filled in the tanks, the temperature of the tanks is 40 ℃, and the residence time of the glass in each tank is 60 s.
The glass from which the alkali-resistant protective ink is removed is observed, and the result is as follows: glass has scratches, blueing and fogging.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A deplating liquid for alkali-resistant protective printing ink on deplated glass comprises the following components in percentage by mass:
the total content of the diethylene glycol and the ethylene glycol ethyl ether in the deplating solution is 18-26 wt%;
the total content of the ethylene glycol phenyl ether and the benzyl alcohol in the deplating solution is 16-20 wt%.
2. The stripping solution of claim 1, wherein the alcohol amine comprises one or more of monoethanolamine, diethanolamine, triethanolamine, and isopropanolamine.
3. The stripping solution of claim 1, wherein the surfactant comprises isooctyl alcohol ether phosphate and/or fatty alcohol-polyoxyethylene ether.
4. A deplating method comprises the following steps:
a) soaking glass to be deplated with alkali-resistant protective ink in the deplating solution according to any one of claims 1 to 3;
b) and taking the glass out of the deplating solution, and then washing and drying to obtain the glass without the alkali-resistant protective ink.
5. The deplating method according to claim 4, wherein in the step a), the soaking temperature is 85-95 ℃; the soaking time is 200-600 s.
6. The deplating method according to claim 4, wherein the step a) specifically comprises:
and sequentially soaking the glass to be deplated with the alkali-resistant protective printing ink in a plurality of deplating tanks filled with the deplating liquid.
7. The deplating method according to claim 6, wherein the number of the deplating tanks is 3-6;
the residence time of the glass to be deplated with the alkali-resistant protective printing ink in each deplating tank is 80-100 s.
8. The deplating method according to claim 4, wherein in step b), the washing specifically comprises: and sequentially carrying out water washing, alkali washing and rinsing.
9. The deplating method according to claim 4, wherein in step b), the drying specifically comprises: and air drying and drying are sequentially carried out.
10. The deplating method according to any one of claims 4 to 9, wherein the alkali-resistant protective ink comprises, in parts by weight:
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