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CN112341166A - Ceramic hand mold coating suitable for nitrile rubber glove production and preparation method thereof - Google Patents

Ceramic hand mold coating suitable for nitrile rubber glove production and preparation method thereof Download PDF

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Publication number
CN112341166A
CN112341166A CN202011412127.6A CN202011412127A CN112341166A CN 112341166 A CN112341166 A CN 112341166A CN 202011412127 A CN202011412127 A CN 202011412127A CN 112341166 A CN112341166 A CN 112341166A
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China
Prior art keywords
parts
nitrile rubber
ceramic hand
coating suitable
hand mold
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Granted
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CN202011412127.6A
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Chinese (zh)
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CN112341166B (en
Inventor
耿宪兵
王丙志
刘新玉
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Zibo Haoxiang Mould Technology Co ltd
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Zibo Haoxiang Mould Technology Co ltd
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Abstract

The invention belongs to the technical field of ceramic hand mold preparation, and particularly relates to a ceramic hand mold coating suitable for nitrile rubber glove production and a preparation method thereof. The feed is prepared from the following raw materials in parts by weight: 12-17 parts of feldspar, 10-15 parts of wollastonite, 22-27 parts of spodumene, 15-18 parts of magnesite, 28-33 parts of high-alumina bauxite, 5-10 parts of bentonite, 4.0-6.0 parts of boron carbide, 4.0-5.5 parts of titanium diboride, 5.0-8.5 parts of tin oxide, 6.5-8.0 parts of zinc oxide, 5.0-8.0 parts of cerium oxide, 0.3-0.5 part of sodium silicate and 0.3-0.5 part of sodium hydrogen phosphate. According to the ceramic hand mold coating suitable for producing the nitrile rubber gloves, the coating and the blank are sintered together, chemical reaction occurs between the components of the coating through sintering, the binding force with the blank is good, the process is simple, the prepared coating is compact, and the corrosion resistance and the thermal shock resistance are good.

Description

Ceramic hand mold coating suitable for nitrile rubber glove production and preparation method thereof
Technical Field
The invention belongs to the technical field of ceramic hand mold preparation, and particularly relates to a ceramic hand mold coating suitable for nitrile rubber glove production and a preparation method thereof.
Background
The butyronitrile gloves are mainly processed by butyronitrile rubber, and are indispensable protective articles for protecting hands and preventing cross infection in scientific research industries of medical treatment, medicine and health, hairdressing and beauty, food processing, chemical engineering biology and the like. The nitrile rubber does not contain protein, so that anaphylactic reaction can not be caused, and the nitrile rubber has the performances of static resistance, ageing resistance and oil resistance, is designed according to the hand shape of a human body, has higher flexibility, better tensile property and puncture resistance, higher tensile strength and better wear resistance, and is widely used.
The butyronitrile gloves are mainly prepared by the processes of dipping butyronitrile latex, molding, vulcanizing, surface treatment, dust-free cleaning and the like. In the preparation process, firstly, the used hand mold needs to be subjected to acid washing, alkali washing, rinsing and drying, then the hand mold is dipped in coagulant solution and latex raw materials, and demolding is carried out after vulcanization. The acid washing adopts acid solution such as nitric acid and the like, the alkali washing adopts alkaline solution such as aqueous solution of sodium hydroxide and the like, the rinsing adopts chlorine water, the chlorine washing time is about 20-30min, the temperature of the dipping coagulant solution is 60-70 ℃, the temperature of the dipping latex raw material is 20-30 ℃, the temperature of vulcanization is 120-130 ℃, and the temperature difference between the continuous steps is large.
Therefore, the hand mold for preparing the nitrile rubber gloves is required to have good acid and alkali corrosion resistance, oxidation resistance, higher thermal shock resistance stability when subjected to rapid cooling and rapid heating, uniform rubber hanging and good performance of easy demolding after vulcanization.
The traditional hand mold coating has the defects of poor acid resistance and alkali resistance and difficult cleaning, is not suitable for a ceramic hand mold used in the preparation process of nitrile rubber gloves, and in order to improve market competitiveness, the microcrystalline phase structure of the ceramic hand mold needs to be improved, the preparation process of a product needs to be further simplified, the energy consumption is reduced, and the online service life and the qualified rate need to be further improved.
Disclosure of Invention
The purpose of the invention is: providing a ceramic hand mold coating suitable for producing nitrile rubber gloves; the ceramic hand mold coating has acid and alkali resistance, oxidation resistance and thermal shock resistance stability; the invention also provides a preparation method thereof.
The ceramic hand mold coating suitable for producing nitrile rubber gloves is prepared from the following raw materials in parts by weight: 12-17 parts of feldspar, 10-15 parts of wollastonite, 22-27 parts of spodumene, 15-18 parts of magnesite, 28-33 parts of high-alumina bauxite, 5-10 parts of bentonite, 4.0-6.0 parts of boron carbide, 4.0-5.5 parts of titanium diboride, 5.0-8.5 parts of tin oxide, 6.5-8.0 parts of zinc oxide, 5.0-8.0 parts of cerium oxide, 0.3-0.5 part of sodium silicate and 0.3-0.5 part of sodium hydrogen phosphate.
Preferably, the ceramic hand mold coating suitable for producing nitrile rubber gloves is prepared from the following raw materials in parts by weight: 12-15 parts of feldspar, 10-12 parts of wollastonite, 22-25 parts of spodumene, 16-18 parts of magnesite, 28-30 parts of high-alumina bauxite, 5-8 parts of bentonite, 4.0-5.0 parts of boron carbide, 4.0-5.0 parts of titanium diboride, 7.0-8.5 parts of tin oxide, 7.0-8.0 parts of zinc oxide, 6.0-8.0 parts of cerium oxide, 0.3-0.5 part of sodium silicate and 0.3-0.5 part of sodium hydrogen phosphate.
Most preferably, the ceramic hand mold coating suitable for producing nitrile rubber gloves is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 10 parts of wollastonite, 25 parts of spodumene, 18 parts of magnesite, 28 parts of high-alumina bauxite, 8 parts of bentonite, 5.0 parts of boron carbide, 5.0 parts of titanium diboride, 8.0 parts of tin oxide, 7.0 parts of zinc oxide, 6.5 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The ceramic hand mold coating suitable for producing nitrile rubber gloves, provided by the invention, is prepared by taking high-alumina bauxite and spodumene as main materials and adding magnesite, feldspar and wollastonite, so that the formation of a cordierite phase and a mullite phase is ensured, the corrosion resistance of the prepared coating is improved due to the matching of metal oxide and rare earth elements, and the oxidation resistance of the coating is improved due to the addition of boron carbide and titanium diboride while the corrosion resistance is further improved.
The invention relates to a preparation method of a ceramic hand mold coating suitable for producing nitrile rubber gloves, which comprises the following steps:
(1) performing wet ball milling on pulping raw materials, namely ball stone and water according to the proportion of 1:1.8-2.0:0.8-1.2 to prepare slurry;
(2) removing iron from the slurry, adding water, adjusting to a certain concentration, and sieving;
(3) the coating is sprayed on the surface of a ceramic hand mold blank, and then the ceramic hand mold blank is sintered in a kiln, and the ceramic hand mold coating suitable for producing nitrile rubber gloves is obtained after post-treatment.
Wherein:
the ball milling time in the step (1) is 40-45h, and when the ball milling is carried out until the proportion of the ball milling particles with the particle size less than 10 mu m is 75-80%, discharging slurry and milling.
And (3) adding water to adjust the Baume degree of the slurry to be 38-40 degrees in the step (2), and sieving the slurry with a 300-350-mesh sieve.
In the step (3), the temperature is raised from room temperature to 600-.
The ceramic hand die blank in the step (3) is prepared from the following raw materials in parts by weight: 30 parts of kaolin, 15 parts of kyanite, 10 parts of waste porcelain powder, 35 parts of calcined bauxite, 5 parts of potassium sodium sand, 12 parts of wollastonite, 20 parts of spodumene, 5 parts of bentonite, 5 parts of sawdust, 3 parts of aluminum fluoride, 0.4 part of vanadium pentoxide and 2 parts of titanium nitride.
And (3) performing surface micro-polishing treatment by using a ceramic ball grinding hand machine, and performing surface integral polishing by using a cloth wheel polishing machine.
Compared with the prior art, the invention has the following beneficial effects:
(1) the ceramic hand mold coating suitable for producing nitrile rubber gloves disclosed by the invention has good binding force with a ceramic hand mold blank, and the rare earth oxide is matched with tin oxide and zinc oxide, so that the coating is more compact and uniform, the corrosion resistance of the coating is improved, the corrosion resistance of the coating is further improved by adding boron carbide, and the oxidation resistance of the coating is improved by adding titanium diboride.
(2) The ceramic hand mold coating suitable for producing nitrile rubber gloves, disclosed by the invention, takes high-alumina bauxite, spodumene, feldspar, wollastonite and magnesite as main raw materials, so that the formation of a mullite phase and a cordierite phase is ensured, the coating has good chemical properties, and the addition of bentonite, sodium silicate and sodium hydrogen phosphate ensures that slurry has good fluidity.
(3) According to the preparation method of the ceramic hand mold coating suitable for producing the nitrile rubber gloves, the coating and the blank are sintered together, so that the energy consumption is reduced, chemical reaction is generated among all components of the coating through sintering, the bonding force with the blank is good, the process is simple, the cost is low, special equipment is not needed, the popularization and the use are easy to realize, the prepared coating is compact, and the corrosion resistance and the thermal shock resistance are good.
Detailed Description
The present invention is further described below with reference to examples.
The ceramic hand die blank disclosed by the invention comprises the following raw materials in parts by weight: 30 parts of kaolin, 15 parts of kyanite, 10 parts of waste porcelain powder, 35 parts of calcined bauxite, 5 parts of potassium sodium sand, 12 parts of wollastonite, 20 parts of spodumene, 5 parts of bentonite, 5 parts of sawdust, 3 parts of aluminum fluoride, 0.4 part of vanadium pentoxide and 2 parts of titanium nitride.
Example 1
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in embodiment 1 is prepared from the following raw materials in parts by weight: 12 parts of feldspar, 10 parts of wollastonite, 22 parts of spodumene, 15 parts of magnesite, 33 parts of high-alumina bauxite, 5 parts of bentonite, 4.0 parts of boron carbide, 5.0 parts of titanium diboride, 5.0 parts of tin oxide, 6.5 parts of zinc oxide, 5.0 parts of cerium oxide, 0.3 part of sodium silicate and 0.3 part of sodium hydrogen phosphate.
The preparation method of the ceramic hand mold coating suitable for producing nitrile rubber gloves described in embodiment 1 comprises the following steps:
(1) performing wet ball milling on pulping raw materials, namely ball stone and water according to the proportion of 1:1.8:0.8 to prepare slurry;
(2) removing iron from the slurry, adding water, adjusting to a certain concentration, and sieving;
(3) the coating is sprayed on the surface of a ceramic hand mold blank, and then the ceramic hand mold blank is sintered in a kiln, and the ceramic hand mold coating suitable for producing nitrile rubber gloves is obtained after post-treatment.
Wherein:
the ball milling time in the step (1) is 45 hours, and when the ball milling is carried out until the proportion of less than 10 mu m is 75 percent, the slurry is discharged and milled.
Adding water to adjust the Baume degree of the slurry to be 38 degrees in the step (2), and sieving the slurry with a 300-mesh sieve.
And (3) firstly raising the temperature from room temperature to 600 ℃ at the temperature raising speed of 5 ℃/min, preserving the heat for 30min, then raising the temperature to 850 ℃ at the temperature raising speed of 2 ℃/min, preserving the heat for 30min, and finally raising the temperature to 1200 ℃ at the temperature raising speed of 2 ℃/min, preserving the heat for 20min and firing.
And (3) performing surface micro-polishing treatment by using a ceramic ball grinding hand machine, and performing surface integral polishing by using a cloth wheel polishing machine.
Example 2
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in embodiment 2 is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 11 parts of wollastonite, 24 parts of spodumene, 17 parts of magnesite, 28 parts of high-alumina bauxite, 7 parts of bentonite, 5.0 parts of boron carbide, 4.0 parts of titanium diboride, 7.0 parts of tin oxide, 7.0 parts of zinc oxide, 6.0 parts of cerium oxide, 0.4 part of sodium silicate and 0.4 part of sodium hydrogen phosphate.
The preparation method of the ceramic hand mold coating suitable for producing nitrile rubber gloves described in embodiment 2 comprises the following steps:
(1) performing wet ball milling on pulping raw materials, namely ball stone and water according to the proportion of 1:1.8:1.2 to prepare slurry;
(2) removing iron from the slurry, adding water, adjusting to a certain concentration, and sieving;
(3) the coating is sprayed on the surface of a ceramic hand mold blank, and then the ceramic hand mold blank is sintered in a kiln, and the ceramic hand mold coating suitable for producing nitrile rubber gloves is obtained after post-treatment.
Wherein:
and (2) performing ball milling for 43h in the step (1), and discharging slurry and milling when the ball milling is performed until the proportion of the ball milling particles smaller than 10 mu m is 80%.
Adding water to adjust the Baume degree of the slurry to 40 degrees in the step (2), and sieving the slurry with a 350-mesh sieve.
And (3) firstly raising the temperature from room temperature to 670 ℃ at the heating rate of 7 ℃/min, keeping the temperature for 35min, then raising the temperature to 900 ℃ at the heating rate of 3 ℃/min, keeping the temperature for 35min, and finally raising the temperature to 1250 ℃ at the heating rate of 2 ℃/min, keeping the temperature for 30min and firing.
And (3) performing surface micro-polishing treatment by using a ceramic ball grinding hand machine, and performing surface integral polishing by using a cloth wheel polishing machine.
Example 3
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in this embodiment 3 is prepared from the following raw materials in parts by weight: 17 parts of feldspar, 13 parts of wollastonite, 25 parts of spodumene, 17 parts of magnesite, 28 parts of high-alumina bauxite, 8 parts of bentonite, 5.0 parts of boron carbide, 4.0 parts of titanium diboride, 8.5 parts of tin oxide, 8.0 parts of zinc oxide, 8.0 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The preparation method of the ceramic hand mold coating suitable for producing nitrile rubber gloves described in embodiment 3 comprises the following steps:
(1) performing wet ball milling on pulping raw materials, namely ball stone and water according to the proportion of 1:2.0:1.2 to prepare slurry;
(2) removing iron from the slurry, adding water, adjusting to a certain concentration, and sieving;
(3) the coating is sprayed on the surface of a ceramic hand mold blank, and then the ceramic hand mold blank is sintered in a kiln, and the ceramic hand mold coating suitable for producing nitrile rubber gloves is obtained after post-treatment.
Wherein:
the ball milling time in the step (1) is 40h, and when the ball milling is carried out until the proportion of less than 10 mu m is 80%, slurry is discharged and milled.
Adding water to adjust the Baume degree of the slurry to 40 degrees in the step (2), and sieving the slurry with a 350-mesh sieve.
And (3) firstly heating from room temperature to 630 ℃ at the heating rate of 5 ℃/min, keeping the temperature for 30min, then heating to 900 ℃ at the heating rate of 3 ℃/min, keeping the temperature for 35min, and finally heating to 1230 ℃ at the heating rate of 2 ℃/min, keeping the temperature for 25min, and firing.
And (3) performing surface micro-polishing treatment by using a ceramic ball grinding hand machine, and performing surface integral polishing by using a cloth wheel polishing machine.
Example 4
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in this embodiment 4 is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 10 parts of wollastonite, 25 parts of spodumene, 18 parts of magnesite, 28 parts of high-alumina bauxite, 8 parts of bentonite, 5.0 parts of boron carbide, 5.0 parts of titanium diboride, 8.0 parts of tin oxide, 7.0 parts of zinc oxide, 6.5 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The preparation method of the ceramic hand mold coating suitable for producing nitrile rubber gloves described in this embodiment 4 comprises the following steps:
(1) performing wet ball milling on pulping raw materials, namely ball stone and water according to the proportion of 1:1.8:1.0 to prepare slurry;
(2) removing iron from the slurry, adding water, adjusting to a certain concentration, and sieving;
(3) the coating is sprayed on the surface of a ceramic hand mold blank, and then the ceramic hand mold blank is sintered in a kiln, and the ceramic hand mold coating suitable for producing nitrile rubber gloves is obtained after post-treatment.
Wherein:
the ball milling time in the step (1) is 45 hours, and when the ball milling is carried out until the proportion of less than 10 mu m is 78%, slurry is discharged and milled.
And (3) adding water to adjust the Baume degree of the slurry to be 40 degrees in the step (2), and sieving the slurry with a 300-mesh sieve.
And (3) firstly raising the temperature from room temperature to 650 ℃ at the heating rate of 6 ℃/min, keeping the temperature for 30min, then raising the temperature to 950 ℃ at the heating rate of 3 ℃/min, keeping the temperature for 35min, and finally raising the temperature to 1250 ℃ at the heating rate of 1 ℃/min, keeping the temperature for 30min and firing.
And (3) performing surface micro-polishing treatment by using a ceramic ball grinding hand machine, and performing surface integral polishing by using a cloth wheel polishing machine.
Comparative example 1
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in comparative example 1 is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 10 parts of wollastonite, 25 parts of spodumene, 18 parts of magnesite, 28 parts of high-alumina bauxite, 8 parts of bentonite, 5.0 parts of boron carbide, 5.0 parts of titanium diboride, 8.0 parts of tin oxide, 7.0 parts of zinc oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The preparation method described in this comparative example 1 is the same as in example 4.
Comparative example 2
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in this embodiment 4 is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 10 parts of wollastonite, 25 parts of spodumene, 18 parts of magnesite, 28 parts of high-alumina bauxite, 8 parts of bentonite, 5.0 parts of boron carbide, 5.0 parts of titanium diboride, 8.0 parts of tin oxide, 6.5 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The preparation method described in this comparative example 2 is the same as that of example 4.
Comparative example 3
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in comparative example 3 is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 10 parts of wollastonite, 25 parts of spodumene, 18 parts of magnesite, 28 parts of high-alumina bauxite, 8 parts of bentonite, 8.0 parts of tin oxide, 7.0 parts of zinc oxide, 6.5 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The preparation method described in this comparative example 3 is the same as that of example 4.
Comparative example 4
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in comparative example 4 is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 10 parts of wollastonite, 18 parts of spodumene, 18 parts of magnesite, 40 parts of high-alumina bauxite, 8 parts of bentonite, 5.0 parts of boron carbide, 5.0 parts of titanium diboride, 8.0 parts of tin oxide, 7.0 parts of zinc oxide, 6.5 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The preparation method described in this comparative example 4 is the same as that of example 4.
Comparative example 5
The ceramic hand mold coating suitable for producing nitrile rubber gloves described in comparative example 5 is prepared from the following raw materials in parts by weight: 43 parts of feldspar, 10 parts of wollastonite, 25 parts of spodumene, 18 parts of magnesite, 8 parts of bentonite, 5.0 parts of boron carbide, 5.0 parts of titanium diboride, 8.0 parts of tin oxide, 7.0 parts of zinc oxide, 6.5 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
The preparation method described in this comparative example 5 is the same as that of example 4.
The ceramic hand mold coatings prepared in examples 1-4 and comparative examples 1-5, which were suitable for use in the production of nitrile rubber gloves, were subjected to performance testing, the results of which are shown in table 1 below:
the acid and alkali resistance test method comprises the following steps: slightly boiling for 1 hour in a sulfuric acid solution (10%) or sodium hydroxide solution (10%) medium, and determining the percentage of the mass of the sample after corrosion to the initial mass of the sample, namely the acid/alkali resistance of the ceramic hand mold.
The water absorption and the volume density are detected according to QB/T1642-2012, the acid and alkali resistance is detected according to GB/T4738-2015, and the thermal shock resistance is tested according to the GB/T3298-2008 thermal shock resistance test method for the domestic ceramic (the product is heated to 180 ℃, kept warm for 30min, put into water at 20 +/-2 ℃, subjected to heat exchange, and the heat exchange times are recorded).
TABLE 1 ceramic hand mold coating Performance test results
Figure BDA0002818766700000061
Figure BDA0002818766700000071

Claims (9)

1. The utility model provides a pottery hand former coating suitable for nitrile rubber gloves production which characterized in that: the feed is prepared from the following raw materials in parts by weight: 12-17 parts of feldspar, 10-15 parts of wollastonite, 22-27 parts of spodumene, 15-18 parts of magnesite, 28-33 parts of high-alumina bauxite, 5-10 parts of bentonite, 4.0-6.0 parts of boron carbide, 4.0-5.5 parts of titanium diboride, 5.0-8.5 parts of tin oxide, 6.5-8.0 parts of zinc oxide, 5.0-8.0 parts of cerium oxide, 0.3-0.5 part of sodium silicate and 0.3-0.5 part of sodium hydrogen phosphate.
2. The ceramic hand mold coating suitable for nitrile rubber glove production according to claim 1, wherein: the feed is prepared from the following raw materials in parts by weight: 12-15 parts of feldspar, 10-12 parts of wollastonite, 22-25 parts of spodumene, 16-18 parts of magnesite, 28-30 parts of high-alumina bauxite, 5-8 parts of bentonite, 4.0-5.0 parts of boron carbide, 4.0-5.0 parts of titanium diboride, 7.0-8.5 parts of tin oxide, 7.0-8.0 parts of zinc oxide, 6.0-8.0 parts of cerium oxide, 0.3-0.5 part of sodium silicate and 0.3-0.5 part of sodium hydrogen phosphate.
3. The ceramic hand mold coating suitable for nitrile rubber glove production according to claim 1, wherein: the feed is prepared from the following raw materials in parts by weight: 15 parts of feldspar, 10 parts of wollastonite, 25 parts of spodumene, 18 parts of magnesite, 28 parts of high-alumina bauxite, 8 parts of bentonite, 5.0 parts of boron carbide, 5.0 parts of titanium diboride, 8.0 parts of tin oxide, 7.0 parts of zinc oxide, 6.5 parts of cerium oxide, 0.5 part of sodium silicate and 0.5 part of sodium hydrogen phosphate.
4. A method for preparing a ceramic hand former coating suitable for nitrile rubber glove production according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
(1) performing wet ball milling on pulping raw materials, namely ball stone and water according to the proportion of 1:1.8-2.0:0.8-1.2 to prepare slurry;
(2) removing iron from the slurry, adding water, adjusting to a certain concentration, and sieving;
(3) the coating is sprayed on the surface of a ceramic hand mold blank, and then the ceramic hand mold blank is sintered in a kiln, and the ceramic hand mold coating suitable for producing nitrile rubber gloves is obtained after post-treatment.
5. The method for preparing a ceramic hand former coating suitable for nitrile rubber glove production according to claim 4, wherein: the ball milling time in the step (1) is 40-45h, and when the ball milling is carried out until the proportion of the ball milling particles with the particle size less than 10 mu m is 75-80%, discharging slurry and milling.
6. The method for preparing a ceramic hand former coating suitable for nitrile rubber glove production according to claim 4, wherein: and (3) adding water to adjust the Baume degree of the slurry to be 38-40 degrees in the step (2), and sieving the slurry with a 300-350-mesh sieve.
7. The method for preparing a ceramic hand former coating suitable for nitrile rubber glove production according to claim 4, wherein: in the step (3), the temperature is raised from room temperature to 600-.
8. The method for preparing a ceramic hand former coating suitable for nitrile rubber glove production according to claim 4, wherein: and (3) performing surface micro-polishing treatment by using a ceramic ball grinding hand machine, and performing surface integral polishing by using a cloth wheel polishing machine.
9. The method for preparing a ceramic hand former coating suitable for nitrile rubber glove production according to claim 4, wherein: the ceramic hand die blank in the step (3) is prepared from the following raw materials in parts by weight: 30 parts of kaolin, 15 parts of kyanite, 10 parts of waste porcelain powder, 35 parts of calcined bauxite, 5 parts of potassium sodium sand, 12 parts of wollastonite, 20 parts of spodumene, 5 parts of bentonite, 5 parts of sawdust, 3 parts of aluminum fluoride, 0.4 part of vanadium pentoxide and 2 parts of titanium nitride.
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