CN113388344A - Dry-particle glaze glue and preparation method thereof - Google Patents
Dry-particle glaze glue and preparation method thereof Download PDFInfo
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- CN113388344A CN113388344A CN202110637395.6A CN202110637395A CN113388344A CN 113388344 A CN113388344 A CN 113388344A CN 202110637395 A CN202110637395 A CN 202110637395A CN 113388344 A CN113388344 A CN 113388344A
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J139/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Adhesives based on derivatives of such polymers
- C09J139/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
- C09J139/06—Homopolymers or copolymers of N-vinyl-pyrrolidones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses dry glaze glue and a preparation method thereof, relating to the technical field of ceramic glaze, wherein the dry glaze glue comprises the following raw materials in percentage by mass: 1-3% of ethylene-vinyl acetate copolymer emulsion, 0.5-2% of polyvinylpyrrolidone, 0.5-1% of modified gum arabic, 0.5-1.5% of industrial sucrose, 90-95% of solvent, 0.5-1% of flatting agent and 1.6-3.3% of auxiliary agent. The dry particle glaze glue can keep the drying speed of the surface and the inner part of the dry particle consistent in the drying process, and has strong binding power. In the using process, the air bubbles of the glaze surface are small, the color development of the glaze surface is bright, and the color tone is pure.
Description
Technical Field
The invention relates to the technical field of ceramic glaze, in particular to dry-particle glaze glue and a preparation method thereof.
Background
At present, rock plate products are gradually developed as explosive products in the building ceramic industry. Conventional rock plates are increasingly larger in size and thinner in thickness, and these product characteristics place higher demands on the existing glazing process. The body of the large-size ultrathin rock plate is thin, and the control of water in the glazing process of the rock plate body is extremely strict in order to avoid the phenomenon of brick explosion caused by excessive water absorption during glazing in the kiln and influence on the product quality. Therefore, dry particle products are introduced into the building ceramic industry to serve as substitutes of conventional water glaze, so that the production yield of the rock plate is improved. If the dry particles are uniformly distributed on the surface of the rock board blank and are not fixed, the brick blank is easily blown away by a fan near the kiln mouth when entering a kiln for burning, so that the glaze surface is uneven, and the product quality is seriously influenced. In order to solve the problems, a layer of dry glue is sprayed after the dry particles are distributed, the dry particles can be firmly fixed on the surface of a blank body after drying, the dry particles are prevented from being blown away by a fan, and the product quality is improved.
There are many problems with conventional dry glues on the market today, such as: the adhesion force of the dry-method glue is not enough, and the use amount of the glue needs to be increased when the bonding strength of dry particles is improved, so that the green body absorbs water excessively; the dry-method glue has too many organic matters and high impurity content, and the volume of bubbles in the glaze is large and the amount of the bubbles is large after dry particles are fired, so that the polishing yield is influenced; the dry-process glue has poor permeability, and often a layer on the surface of a dry particle is stuck, while the inside of the dry particle is still in a loose state, so that the phenomena of glaze separation, cracking and the like after sintering are caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing dry glaze glue which is high in drying speed and strong in binding power. In the using process, the air bubbles of the glaze surface are small, the color development of the glaze surface is bright, and the color tone is pure.
The technical problem to be solved by the invention is to provide a preparation method of the dry-particle glaze glue.
In order to achieve the technical effect, the invention provides dry-particle glaze glue which comprises the following raw materials in percentage by mass:
1-3% of ethylene-vinyl acetate copolymer emulsion, 0.5-2% of polyvinylpyrrolidone, 0.5-1% of modified gum arabic, 0.5-1.5% of industrial sucrose, 90-95% of solvent and 1.6-3.3% of assistant.
Preferably, the vinyl acetate content in the ethylene-vinyl acetate copolymer emulsion is 70-95 wt%.
Preferably, the average molecular mass of the polyvinylpyrrolidone is 3000-16000; the modified Arabic gum has the relative molecular mass of 20000-35000.
Preferably, the auxiliary agent comprises the following components in percentage by mass:
0.5-1% of flatting agent, 0.5-1% of defoaming agent, 0.1-0.3% of pH regulator and 0.5-1% of preservative.
Preferably, the solvent is one or more selected from water, ethanol, glycol and glycerol;
the leveling agent is polyether modified organic silicon;
the defoaming agent is solvent-type organic silicon and/or water-based organic silicon;
the pH regulator is an alcohol amine compound and/or basic amino acid;
the preservative is cason and/or benzoic acid.
Preferably, the solvent is a mixture of water, ethylene glycol and glycerol, and the weight ratio of the three is as follows: the dosage of the ethylene glycol is as follows: the dosage of glycerol is as follows: the dosage of water is (5-10): (3-6): (85-90).
In order to achieve the technical effect, the invention provides a preparation method of dry-particle glaze glue, which comprises the following steps:
A. heating the solvent to 50-70 ℃, sequentially adding polyvinylpyrrolidone, modified gum arabic and industrial sucrose, and continuously stirring until the mixture is uniformly dispersed to obtain a first mixed solution;
B. adding the ethylene-vinyl acetate copolymer emulsion into the first mixed solution according to the proportion, stirring and mixing until the emulsion is uniform and milky white, and stopping stirring to obtain a second mixed solution;
C. after the second mixed solution is cooled to room temperature, adding an auxiliary agent according to the proportion, and uniformly stirring to obtain a third mixed solution;
D. and sieving the third mixed solution by using a screen to obtain the dry-particle glaze glue.
Preferably, in the step A, the stirring time is 1-3 h, and the first mixed solution is in a light yellow transparent state;
in the step B, the stirring time is 0.5-2 h;
in the step C, stirring for 0.5-2 h;
in the step D, the mesh number of the screen is 200-400 meshes.
Preferably, the viscosity of the dry particle glaze glue is 10-15 mPa · s, the surface tension is 33-38 mN/m, and the pH is 7-8.
The invention also provides a use method of the dry-particle glaze glue, which comprises the following steps:
mixing the dry-particle glaze glue and the protective glaze slurry, and spraying the mixture on the surface of the blank to form a first glue layer on the surface of the blank;
applying dry glaze on the surface of the first glue layer to form a dry glaze layer;
spraying a mixed solution of the dry glaze glue and the protective glaze slurry on the surface of the dry glaze layer to form a second glue layer;
and drying the green body forming the second glue layer, and sintering after drying to obtain a finished product.
The implementation of the invention has the following beneficial effects:
1. the main raw materials of the dry-particle glaze glue are ethylene-vinyl acetate copolymer emulsion, polyvinylpyrrolidone, arabic resin and industrial sucrose, the four raw materials are viscous materials, aqueous solutions of the viscous materials have certain viscosity, and particularly, the bonding force is more stable after the solution is dried. Will four kinds of raw materials are used after mixing, can adjust the dry temperature gradient of dry grain glaze glue, reduce the temperature that begins futilely of dry grain glaze glue for the surface and the inside drying rate on dry grain glaze layer keep almost the same, guarantee the fixed effect of dry grain glaze, avoided near kiln mouth fan to blow off dry grain, also avoided dry grain glaze to burn when becoming because of the glaze layer inside glue not dry and residual liquid, and then the glaze absciss layer that causes, the cracked defect, promoted the yield of rock plate product.
2. The raw materials of the dry-particle glaze glue adopt the low-molecular-weight ethylene-vinyl acetate copolymer emulsion, the polyvinylpyrrolidone, the Arabic resin and the industrial sucrose, so that the strong water solubility of the raw materials is ensured, the raw materials are not easy to layer when being mixed for use, and the stability of a mixed system is improved.
3. The ethylene-vinyl acetate copolymer emulsion with low molecular weight, the polyvinyl pyrrolidone, the arabic resin and the industrial sucrose in the raw materials of the dry-particle glaze glue are low in carbonization temperature, and are easy to degrade at high temperature and remove from the dry-particle glaze in the sintering stage of the dry-particle glaze, pinholes and bubbles are not generated, white spots are prevented from being generated in the subsequent polishing and waxing processes, and the appearance quality of the product is improved.
4. The glue has high raw material grade and low impurity content, is easy to remove when a dry glaze layer is fired, is beneficial to maintaining the color development of dry glaze, enables the color tone to be fresh, and is convenient for the pattern design of high-grade rock plate products.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below.
In order to achieve the technical effect, the invention provides dry-particle glaze glue which comprises the following raw materials in percentage by mass:
1-3% of ethylene-vinyl acetate copolymer emulsion, 0.5-2% of polyvinylpyrrolidone, 0.5-1% of modified gum arabic, 0.5-1.5% of industrial sucrose, 90-95% of solvent and 1.6-3.3% of assistant.
The dry-particle glaze glue is mainly prepared from ethylene-vinyl acetate copolymer emulsion, polyvinylpyrrolidone, arabic resin and industrial sucrose, wherein the four raw materials are viscous materials, aqueous solutions of the viscous materials have certain viscosity, and particularly, the bonding force is firmer after the solution is dried. When the four raw materials are used as glue, the drying speeds of the four raw materials are different, generally, the drying speed of the industrial sucrose is higher than that of the polyvinylpyrrolidone solution and that of the araben resin than that of the ethylene-vinyl acetate copolymer emulsion. The drying temperature gradient that can adjust dry grain glaze glue is used to four kinds of raw materials after mixing, reduces dry grain glaze glue's the beginning dry temperature, compares with the glue that uses single kind, dry grain glaze glue can make the surface of dry grain glaze layer and inside drying rate keep unanimous relatively, guarantees the fixed effect of dry grain glaze, has avoided near the fan of kiln mouth to blow off dry grain, has also avoided dry grain glaze to burn into because of the inside glue of glaze layer not dry and residual liquid, and then the glaze absciss layer that causes, defects such as chap have finally promoted the yield of rock plate product. The invention has the advantages that through small-test and middle-test production, the produced ceramic product has stable quality, stable and reliable production process, low raw material cost, simple processing process and low use cost, is beneficial to mass production, and can be widely popularized and applied.
In particular, a polyvinyl acetate-ethylene (hereinafter abbreviated as EVA) emulsion is a common adhesive, is usually prepared by an emulsion polymerization process, and is widely used for bonding materials such as plastic veneers such as wood and PVC, paper, non-woven fabrics, and leather due to low cost and good bonding performance. In the emulsion polymerization process, partially hydrolyzed polyvinyl alcohol is usually adopted as a stabilizer, and compared with a system with a stable micromolecule emulsifier, the product has the advantages of good construction performance, high wet viscosity, high drying speed and good heat resistance, in the dry-particle glaze glue described in the patent, the mass percentage of the ethylene-vinyl acetate copolymer emulsion is 1-3%, and the mass percentage of the exemplified ethylene-vinyl acetate copolymer emulsion is 1.5%, 2% and 2.5%, but the invention is not limited thereto.
Compared with polyethylene, EVA has lowered crystallinity, raised flexibility, impact resistance, stuffing mixing performance and heat sealing performance, and excellent flexibility, impact strength, environment stress cracking resistance and optical performance in relatively wide temperature range. Generally, the physical and chemical properties of the EVA emulsion are mainly related to the content of vinyl acetate in the molecular chain (hereinafter referred to as VA content). When the VA content is high, the elasticity, flexibility, adhesiveness, intermiscibility, transparency and solubility of the EVA emulsion are improved; if the VA content is lower, the EVA emulsion performance is close to that of polyethylene. Therefore, in order to improve the adhesion and compatibility of the dry glaze glue, the content of vinyl acetate in the ethylene-vinyl acetate copolymer emulsion is 70-95 wt%, and the appearance of the emulsion is milky-white to yellowish, and the content of vinyl acetate in the exemplary ethylene-vinyl acetate copolymer emulsion is 75 wt%, 80 wt%, 85 wt% and 90 wt%, but not limited thereto.
Polyvinylpyrrolidone (PVP) in the raw material formula of the dry-particle glaze glue is a non-ionic high-molecular compound, is the most distinctive of N-vinyl amide polymers, and is the most deeply and widely researched fine chemicals. The average molecular weight of PVP is conventionally expressed in terms of K, which is generally divided into four classes, namely K-15, K-30, K-60, K-90, which correspond to average molecular weights in the respective ranges 10000, 40000, 160000, 360000. The viscosity of PVP with different molecular weight is different, the larger the average molecular weight of PVP is, the larger the K value is, the larger the viscosity is, and the opposite is true. The average molecular weight of PVP in the raw material formula of the dry-particle glaze glue is 3000-16000, the dry-particle glaze glue belongs to PVP with a low K value, the viscosity is relatively low, the dry-particle glaze glue is easily soluble in water, and an aqueous solution is colorless and transparent. The low molecular weight PVP is more conducive to use with other viscous materials in the formulation and is more easily removed during subsequent firing. The mass percent of the polyvinylpyrrolidone is 0.5-2%, and the mass percent of the polyvinylpyrrolidone is 0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.6%, 1.8% for example, but not limited thereto.
In addition, the raw materials of the dry-particle glaze glue comprise modified gum arabic and industrial sucrose. The modified gum arabic is a light yellow or tawny semitransparent block, is a polyelectrolyte with the molecular weight of 20000-35000, and has certain viscosity and thickening effect. The modified gum arabic is 0.5-1% by mass, and exemplary gum arabic is 0.6%, 0.7%, 0.8%, 0.9% by mass, but not limited thereto.
The industrial sucrose is a yellow-white crystal or powder, has a molecular weight of about 342, is very soluble in water, and has viscosity in an aqueous solution. The mass percent of the industrial sucrose is 0.5-1.5%, and the mass percent of the exemplary industrial sucrose is 0.6%, 0.9%, 1%, 1.2%, but not limited thereto
Further, the auxiliary agent in the raw materials of the dry-particle glaze glue comprises one or more of a leveling agent, a defoaming agent, a pH regulator and a preservative, and preferably, the auxiliary agent comprises the leveling agent, the defoaming agent, the pH regulator and the preservative. The leveling agent is polyether modified organic silicon, and preferably, the leveling agent is one or more of BYK-300, EFKA-3033 and DEUCHEM 466. The mass percent of the leveling agent is 0.5-1%, and the mass percent of the exemplary leveling agent is 0.6%, 0.7%, 0.8% and 0.9%, but not limited thereto.
The defoaming agent is solvent-type silicone and/or water-based silicone, and preferably, the defoaming agent is one or more of BYK-323, BYK-390, BYK-022 and BYK-024. The mass percent of the defoaming agent is 0.5-1%, and the mass percent of the exemplary defoaming agent is 0.6%, 0.7%, 0.8% and 0.9%, but not limited thereto.
The pH regulator is an alcohol amine compound and/or basic amino acid, preferably the pH regulator is an alcohol amine compound, and most preferably the pH regulator is one or more of dimethylethanolamine and triethanolamine. The weight percentage of the pH regulator is 0.1-0.3%, and the weight percentage of the exemplified pH regulator is 0.15%, 0.2%, 0.25%, but not limited thereto.
The preservative is cason and benzoic acid, preferably, the preservative is cason, and the main active ingredient of the preservative is isothiazolinone compounds. The mass percent of the preservative is 0.5-1%, and the mass percent of the exemplary preservative is 0.6%, 0.7%, 0.8%, 0.9%, but not limited thereto.
In the raw materials of the dry-particle glaze glue, the content of a solvent is 90-95% by mass, and the solvent is one or more of water, ethanol, ethylene glycol and glycerol. Preferably, the solvent is a mixture of water, glycol and glycerol, and the weight ratio of the three is: the dosage of the ethylene glycol is as follows: the dosage of glycerol is as follows: the dosage of water is (5-10): (3-6): (85-90). In the preparation process of the dry-particle glaze glue, the solvent plays a role in dispersing and moisturizing, and provides a reaction system for preparation.
Correspondingly, the preparation method of the dry-particle glaze glue comprises the following steps:
A. heating the solvent to 50-70 ℃, sequentially adding polyvinylpyrrolidone, modified gum arabic and industrial sucrose, and continuously stirring until the mixture is uniformly dispersed to obtain a first mixed solution;
B. adding the ethylene-vinyl acetate copolymer emulsion into the first mixed solution according to the proportion, stirring and mixing until the emulsion is uniform and milky white, and stopping stirring to obtain a second mixed solution;
C. after the second mixed solution is cooled to room temperature, adding an auxiliary agent into the second mixed solution according to the proportion, and uniformly stirring to obtain a third mixed solution;
specifically, when the auxiliary agent is added, the leveling agent, the defoaming agent, the pH regulator and the preservative should be added in sequence.
D. And sieving the third mixed solution by using a screen to obtain the dry-particle glaze glue.
In the preparation process, the stirring time in the step A is 1-3 h, the first mixed solution is in a light yellow transparent state, the stirring time in the step B is 0.5-2 h, the stirring time in the step C is 0.5-2 h, and the mesh number in the step D is 400 meshes, preferably 350 meshes, and most preferably 325 meshes. The viscosity of the prepared dry-particle glaze glue is 10-15 mPa · s, the surface tension is 33-38 mN/m, and the pH is 7-8.
The dry glaze glue is used in the dry glaze glazing process, and the specific use method is as follows:
mixing the dry-particle glaze glue and the protective glaze slurry, and spraying the mixture on the surface of the blank with the pattern to form a first glue layer on the surface of the blank; glazing with dry glaze on the surface of the first glue layer to form a dry glaze layer; continuously spraying the mixed liquid of the dry glaze glue and the protective glaze on the surface of the dry glaze layer to form a second glue layer; and sending the blank sprayed with the second glue layer to a drying kiln for drying, and sending the dried blank to a kiln for sintering to obtain a finished product.
Specifically, the dry-particle glaze glue and the protective glaze slurry are mixed, the mixture is adjusted to the specific gravity of 1.18-1.22, and the mixture is sprayed on a blank with a pattern by a high-pressure spray gun, wherein the application amount is 115-120 g/m2Forming a first glue layer on the surface of the blank; then, a layer of uniform dry particles is distributed on the surface of the first glue layer through a dry particle distributing machine to form a dry particle glaze layer; finally spraying a layer of mixed liquid of dry glaze glue and protective glaze on the surface of the dry glaze layer by using a high-pressure spray gun, wherein the application amount is 195-205 g/m2Forming a second glue layer; and sending the blank sprayed with the second glue layer to a drying kiln for drying, and sending the dried blank to the kiln for firing to obtain a finished product, wherein the drying temperature of the drying kiln is 120-130 ℃.
The raw materials of the dry-particle glaze glue adopt low-molecular-weight EVA emulsion, PVP, Arabic resin and industrial sucrose, so that the strong water solubility of the raw materials is ensured, the raw materials are not easy to layer when being mixed for use, the stability of a mixing system is high, and the dry-particle glaze glue is more uniform and consistent in the spraying process. In addition, in the firing stage of the dry particle glaze, the carbonization temperature of the low-molecular-weight EVA emulsion, PVP, the Arabic resin and industrial cane sugar is low, so that the EVA emulsion, the PVP, the Arabic resin and the industrial cane sugar are more easily degraded at high temperature and removed from the dry particle glaze, pinholes and bubbles are not generated, white spots are prevented from being generated in the subsequent polishing and waxing procedures, and the appearance quality of the product is improved. In addition, the glue has high raw material grade and low impurity content, is easy to remove when a dry glaze layer is fired, is favorable for maintaining the color of the dry glaze, enables the color tone to be fresh and is convenient for the pattern design of high-grade rock plate products.
For a better understanding of the invention, the following examples are included in the present description:
examples 1 to 6
The raw materials and contents of the dry glaze glue particles of examples 1-6 are shown in Table 1.
Table 1 examples 1 to 6 raw materials and contents (% by mass) of dry glaze glue
The raw materials and the contents shown in table 1 are mixed, and the preparation process of the dry-particle glaze glue described in the embodiment 1-6 is as follows:
weighing a solvent according to the proportion shown in the embodiment 1-6, adding the solvent into a double-layer glass reaction kettle, heating to 60 ℃, sequentially adding PVP, modified Arabic resin and industrial sucrose raw materials according to the proportion, and continuously stirring for 1.5-2 hours until the raw materials are dissolved and react completely, wherein the whole solution system is in a light yellow and transparent state.
And adding the EVA emulsion according to the proportion shown in the embodiment 1-6, continuously stirring and uniformly mixing for 0.5-1 h, standing after the whole reaction system presents uniform milky white, and cooling to room temperature.
And sequentially adding the auxiliary agents into the mixed liquid, continuously stirring for 0.5-1 h, and after stirring, screening by using a 325-mesh screen to obtain dry-particle glaze glue.
Test examples 1 to 6
The dry glaze glue prepared in the embodiments 1 to 6 is subjected to viscosity detection, and the viscosity, surface tension and pH value of the dry glaze glue are mainly detected. And detecting the performance indexes by using a viscosity tester, a surface tension tester and a pH value tester.
In order to evaluate the use effect of the dry-particle glaze glue, the dry-particle glaze glue prepared in the examples 1 to 6 was applied to a ceramic rock plate, the dry-particle glaze glue prepared in the examples 1 to 6 was mixed with a protective glaze slurry, the slurry with the specific gravity of 1.2 was adjusted, and the mixture was sprayed on a blank with a pattern by a high-pressure spray gun, wherein the application amount was 115g/m2Then a layer of uniform dry particles is coated on the dry particle distributing machine, and finally the mixed solution of the dry particle glaze glue and the protective glaze prepared in the embodiments 1-6 is sprayed by a high-pressure spray gun, wherein the application amount is 195g/m2And drying the rock plate in a drying kiln at 120 ℃ and then putting the rock plate into the kiln to be fired into a rock plate finished product. And evaluating the prepared rock plate finished product, and qualitatively evaluating the surface condition, pinhole defect, cracking defect, bubble defect and glaze color development of the rock plate finished product according to experience by observing with naked eyes by technicians. Specifically, the performance test results of the dry glaze glue particles of test examples 1-6 are shown in table 2.
Table 2 test examples 1-6 dry glaze glue performance test results
The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various changes and modifications may be made by one skilled in the art without departing from the spirit of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.
Claims (10)
1. The dry-particle glaze glue is characterized by comprising the following raw materials in percentage by mass:
1-3% of ethylene-vinyl acetate copolymer emulsion, 0.5-2% of polyvinylpyrrolidone, 0.5-1% of modified gum arabic, 0.5-1.5% of industrial sucrose, 90-95% of solvent and 1.6-3.3% of auxiliary agent.
2. The dry bead glaze glue of claim 1, wherein the vinyl acetate content in the ethylene-vinyl acetate copolymer emulsion is 70-95 wt%.
3. The dry bead glaze glue of claim 1, wherein the polyvinylpyrrolidone has an average molecular weight of 3000 to 16000; the modified Arabic gum has the relative molecular mass of 20000-35000.
4. The dry bead glaze glue of claim 1, wherein the auxiliary agent comprises, in mass percent:
0.5-1% of flatting agent, 0.5-1% of defoaming agent, 0.1-0.3% of pH regulator and 0.5-1% of preservative.
5. The dry bead glaze glue of claim 4, wherein said solvent is selected from one or more of water, ethanol, ethylene glycol, and glycerol;
the leveling agent is polyether modified organic silicon;
the defoaming agent is solvent-type organic silicon and/or water-based organic silicon;
the pH regulator is an alcohol amine compound and/or basic amino acid;
the preservative is cason and/or benzoic acid.
6. The dry bead glaze glue of claim 1 or 5, wherein the solvent is a mixture of water, ethylene glycol and glycerol, and the weight ratio of the three is: the dosage of the ethylene glycol is as follows: the dosage of glycerol is as follows: the dosage of water is (5-10): (3-6): (85-90).
7. A method of preparing a dry-particle glaze glue according to any one of claims 1 to 6, comprising the following steps:
A. heating the solvent to 50-70 ℃, sequentially adding polyvinylpyrrolidone, modified gum arabic and industrial sucrose, and continuously stirring until the mixture is uniformly dispersed to obtain a first mixed solution;
B. adding the ethylene-vinyl acetate copolymer emulsion into the first mixed solution according to the proportion, stirring and mixing until the emulsion is uniform and milky white, and stopping stirring to obtain a second mixed solution;
C. after the second mixed solution is cooled to room temperature, adding an auxiliary agent according to the proportion, and uniformly stirring to obtain a third mixed solution;
D. and sieving the third mixed solution by using a screen to obtain the dry-particle glaze glue.
8. The method for preparing the dry-particle glaze glue according to claim 7, wherein in the step A, the stirring time is 1-3 hours, and the first mixed solution is in a light yellow transparent state;
in the step B, the stirring time is 0.5-2 h;
in the step C, stirring for 0.5-2 h;
in the step D, the mesh number of the screen is 200-400 meshes.
9. The method for preparing the dry glaze glue according to claim 7, wherein the viscosity of the dry glaze glue is 10-15 mPa.s, the surface tension is 33-38 mN/m, and the pH is 7-8.
10. Use of a dry-particle glaze glue according to any one of claims 1 to 6, characterized in that it comprises:
mixing the dry-particle glaze glue and the protective glaze slurry, and spraying the mixture on the surface of the blank to form a first glue layer on the surface of the blank;
applying dry glaze on the surface of the first glue layer to form a dry glaze layer;
spraying a mixed solution of the dry glaze glue and the protective glaze slurry on the surface of the dry glaze layer to form a second glue layer;
and drying the green body forming the second glue layer, and sintering after drying to obtain a finished product.
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| CN202110637395.6A Active CN113388344B (en) | 2021-06-08 | 2021-06-08 | Dry-particle glaze glue and preparation method thereof |
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| CN115196993A (en) * | 2022-07-13 | 2022-10-18 | 九江诺贝尔陶瓷有限公司 | Dry particles and production method of once-fired double-digital decorative colorful rock plate by using dry particles |
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