Rubber glove box protective glove with latex coating and manufacturing method of rubber glove box protective glove

Abstract

The invention discloses a rubber glove box protective glove with a latex coating and a manufacturing method. The glove comprises a mould pressing rubber layer and a local latex coating. The mold pressing rubber layer is prepared through mold pressing vulcanization forming and comprises rubber, a shielding component, a reinforcing filler, a filling agent, an active agent, an anti-aging agent, a plasticizer, a lubricating release agent, a vulcanizing agent and an accelerant. The local latex coating is prepared through latex impregnation, and latex components comprise latex, reinforcing filler, a stabilizer, a diffuser, an active agent, an anti-aging agent, a vulcanizing agent, an accelerant, a thickening agent, a defoaming agent and a coloring agent. Through formula design of the mold pressing rubber layer and the local latex coating and optimization of a latex dipping process, the glove box glove with high mechanical hazard protection performance in the local position is obtained on the premise that the ray protection function and wearing comfort are guaranteed, and the service life of the glove box glove is prolonged. And the service life of the glove box protective glove under the radiation and mechanical dual harm scenes is prolonged.

Description

A rubber glove box protective glove with latex coating and its manufacturing method. Technical Field

[0001] This invention belongs to the field of protective glove manufacturing technology, and particularly relates to a rubber glove box protective glove with latex coating and its manufacturing method. Background Technology

[0002] When gloves are used in glove cases, wear and damage to the glove surface are not evenly distributed. Areas such as the palms and fingertips, due to frequent contact with tools, parts, and the inner walls of the glove case, are high-risk areas for mechanical damage (such as abrasion, cutting, and puncture). Once a localized area is damaged, the entire glove's sealing and protective functions completely fail, posing a risk of radioactive material leakage and potentially causing serious radiation exposure and environmental pollution. Therefore, there is an urgent need to develop a method to locally enhance the mechanical properties of protective gloves for rubber glove cases. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a rubber glove box protective glove with a latex coating and its manufacturing method. The glove box protective glove includes a molded rubber layer and a localized latex coating that enhances mechanical properties. By designing the formulation components of the molded rubber layer and the localized latex coating, a glove box glove with high mechanical hazard protection in localized areas is obtained while ensuring radiation protection and wearing comfort. This not only improves the service life of the glove box protective glove in scenarios with both radiation and mechanical hazards but also does not affect the overall softness of the protective glove.

[0004] In a first aspect, the present invention discloses a rubber glove box protective glove with a latex coating, comprising a molded rubber layer and a partial latex coating; the molded rubber layer comprises the following components in parts by weight: 100 parts rubber, 50-400 parts shielding component, 5-25 parts reinforcing filler, 5-15 parts filler, 3-13 parts activator, 0.5-2 parts antioxidant, 5-20 parts plasticizer, 1-6 parts lubricating release agent, 0.5-5 parts vulcanizing agent, and accelerator. The latex coating is obtained by latex impregnation, and the latex comprises the following components by weight on a dry basis: 100 parts latex, 5-25 parts reinforcing filler, 1-15 parts stabilizer, 3-15 parts dispersant, 3-13 parts activator, 0.5-2 parts antioxidant, 0.5-5 parts vulcanizing agent, 1-5 parts accelerator, 0.05-1 part thickener, 0.05-0.5 parts defoamer, and 0.1-2 parts colorant.

[0005] Furthermore, the rubber is selected from at least one of butyl rubber, halogenated butyl rubber, chloroprene rubber, ethylene propylene diene monomer (EPDM) rubber, and chlorosulfonated polyethylene rubber.

[0006] Furthermore, the latex is selected from at least one of natural latex, nitrile latex, carboxylated nitrile latex, styrene-butadiene latex, chloroprene latex, and butyl latex.

[0007] Furthermore, the shielding component includes at least one of tungsten, tungsten oxide, tungsten pentaboride, tungsten boride, iron tetroxide, bismuth, and bismuth trioxide.

[0008] Furthermore, for the molded rubber layer, the reinforcing filler includes at least one of carbon black and silica; for the partial latex coating, the reinforcing filler is selected from at least one of calcium carbonate, kaolin, carbon black, silica, and sericite.

[0009] Furthermore, the filler is selected from at least one of talc, clay, barium sulfate, calcium carbonate, sericite, titanium dioxide, and nanofibers.

[0010] Secondly, the present invention also discloses a method for manufacturing a rubber glove box protective glove with a latex coating. The rubber glove box protective glove with a latex coating is the protective glove of the first aspect of the present invention. The manufacturing method includes: laying a rubber sheet flat on the surface of a glove molding mold, molding and vulcanizing it at a high temperature of 140~170°C, and obtaining a single-layer rubber glove box protective glove after demolding; placing the single-layer rubber glove box protective glove on a similar immersion molding mold, immersing it in a coagulant, removing it and drying it, then immersing it in a compound latex, removing it and drying it again; filtering the protective glove in a water bath, and then vulcanizing it to obtain a local latex coating; adjusting the thickness of the local latex coating by repeating the steps of immersion in coagulant-drying-immersion in compound latex-drying.

[0011] Furthermore, the preparation method of the rubber sheet includes: weighing each raw material according to the component ratio in the molding rubber layer, feeding the rubber into an internal mixer for plasticizing, then adding plasticizer, antioxidant, lubricant, release agent, and activator for a first mixing, then adding reinforcing filler, shielding component, and filler for a second mixing, and discharging the rubber when the temperature reaches 110~140℃; passing the rubber through a two-roll mill and extruding it into sheets to obtain section A compound rubber; after cooling, feeding section A compound rubber, vulcanizing agent, and accelerator into an internal mixer for a third mixing, and discharging the rubber when the temperature reaches 80~110℃; passing the rubber through a two-roll mill and extruding it into strips to obtain section B compound rubber strips; feeding section B compound rubber strips into a calender and calendering them into sheets of a fixed thickness, and then cooling them before winding or cutting to obtain the rubber sheet.

[0012] Furthermore, the coagulant is an ethanol solution of calcium chloride, calcium nitrate, or zinc chloride, with a mass concentration of 5-30%.

[0013] Furthermore, the preparation method of the compound latex includes: weighing each raw material according to the dry mass ratio of each component in the latex, adding the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, defoamer, colorant dispersion, accelerator dispersion, and vulcanizing agent dispersion to the latex in sequence, stirring evenly, adding deionized water and thickener to adjust the viscosity of the compound latex, and obtaining a compound latex with a viscosity of 200~1000 mPa·s.

[0014] Furthermore, the preparation method of the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, colorant dispersion, vulcanizing agent dispersion, and accelerator dispersion includes: dividing the stabilizer and dispersant into six parts according to the mass ratio of antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator, and adding them respectively to deionized water to prepare six aqueous solutions with a mass concentration of 10-40% for each of the antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator; and ball milling the six aqueous solutions to obtain the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, colorant dispersion, vulcanizing agent dispersion, and accelerator dispersion.

[0015] This invention provides a rubber glove box protective glove with a latex coating and a method for manufacturing the same. Compared with the prior art, this invention has at least the following advantages: 1. By optimizing the component ratio of the molded rubber layer, this invention not only provides the protective glove with excellent radiation shielding performance, but also greatly improves the basic mechanical properties of the molded rubber layer.

[0016] 2. This invention uses a latex impregnation process to prepare a latex coating in localized areas of rubber gloves where additional mechanical hazard protection is required. The latex coating is tightly bonded to the rubber substrate, significantly enhancing the mechanical hazard protection performance of the protective gloves. Detailed Implementation

[0017] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] Unless otherwise specified, all temperatures mentioned herein are in degrees Celsius, and the preferred embodiments can be freely combined as needed. Those skilled in the art will understand that the data and parameters described in the examples are merely exemplary and do not constitute a limitation of the invention. All components used in the following examples and comparative examples are compounds known in the art, and all equipment used is equipment publicly known in the art. All components and equipment used in this invention can be obtained commercially or prepared using known techniques.

[0019] This invention provides a rubber glove box protective glove with a latex coating, comprising a molded rubber layer and a partial latex coating; the molded rubber layer comprises the following components in parts by weight: 100 parts rubber, 50-400 parts shielding component, 5-25 parts reinforcing filler, 5-15 parts filler, 3-13 parts activator, 0.5-2 parts antioxidant, 5-20 parts plasticizer, 1-6 parts lubricating release agent, 0.5-5 parts vulcanizing agent, and 1 part accelerator. ~4 parts; the local latex coating is obtained by latex impregnation, and the latex comprises the following components by weight on a dry basis: 100 parts latex, 5~25 parts reinforcing filler, 1~15 parts stabilizer, 3~15 parts dispersant, 3~13 parts activator, 0.5~2 parts antioxidant, 0.5~5 parts vulcanizing agent, 1~5 parts accelerator, 0.05~1 part thickener, 0.05~0.5 parts defoamer, and 0.1~2 parts colorant.

[0020] Preferably, the rubber is selected from at least one of butyl rubber, halogenated butyl rubber, chloroprene rubber, ethylene propylene diene monomer (EPDM) rubber, and chlorosulfonated polyethylene rubber, and the latex is selected from at least one of natural latex, nitrile latex, carboxylated nitrile latex, styrene-butadiene latex, chloroprene latex, and butyl latex.

[0021] The shielding component of the present invention preferably includes at least one of tungsten, tungsten oxide, tungsten pentaboride, tungsten boride, iron tetroxide, bismuth, and bismuth trioxide.

[0022] For the molded rubber layer, the reinforcing filler of the present invention preferably includes carbon black and / or silica; for the local latex coating, the reinforcing filler of the present invention is preferably selected from at least one of calcium carbonate, kaolin, carbon black, silica, and sericite.

[0023] Preferably, the filler is selected from at least one of talc, clay, barium sulfate, calcium carbonate, sericite, titanium dioxide, and nanofibers.

[0024] For the molded rubber layer, the activator of the present invention is preferably selected from at least one of magnesium oxide, zinc oxide, and stearic acid; for the partial latex coating, the activator of the present invention is preferably selected from at least one of zinc oxide, zinc stearate, and zinc carbonate.

[0025] Preferably, the antioxidant is selected from at least one of phenolic antioxidants and amine antioxidants.

[0026] Preferably, the plasticizer is selected from at least one of petroleum resin, ester plasticizer, and oil plasticizer.

[0027] Preferably, the lubricating release agent is selected from at least one of paraffin wax, surfactant, fatty acid, and fatty acid salt.

[0028] When the rubber of the present invention contains chloroprene rubber or chlorosulfonated polyethylene rubber, the vulcanizing agent of the molding rubber layer is preferably zinc oxide; when the rubber of the present invention does not contain chloroprene rubber or chlorosulfonated polyethylene rubber, the vulcanizing agent of the molding rubber layer is preferably at least one selected from sulfur, peroxide, reactive phenolic resin, and active oxide; for partial latex coatings, the vulcanizing agent is preferably at least one selected from sulfur, peroxide, and metal oxide.

[0029] For the molded rubber layer, the accelerator of the present invention is preferably selected from at least one of the following: thiuram, thiazole, sulfenamide, dithiocarbamate, guanidine, thiophosphate, and thiourea accelerators; for the local latex coating, the accelerator of the present invention is preferably selected from one of the following: dithiocarbamate, thiuram, and thiazole.

[0030] Preferably, the stabilizer of the present invention is selected from at least one of casein, gelatin, potassium hydroxide, sodium hydroxide, dimethylamine, diethylamine, alkyl sulfate, acyl sulfonate, fatty acid salt, and laurate.

[0031] The preferred dispersant in this invention is NF.

[0032] Preferably, the thickener of the present invention is selected from at least one of polyvinyl alcohol, polyacrylate, polyacrylic acid, polyacrylamide, cellulose, and cellulose salts.

[0033] Preferably, the defoamer is selected from organosiloxanes and / or siloxane-ether copolymers.

[0034] Preferably, the colorant is selected from water-soluble pigments and / or color pastes.

[0035] This invention also provides a method for manufacturing a rubber glove box protective glove with a latex coating. The rubber glove box protective glove with a latex coating is the protective glove provided by this invention. The manufacturing method includes: laying a rubber sheet flat on the surface of a glove molding mold, molding and vulcanizing it at a high temperature of 140~170℃ for 10~25min, and obtaining a single-layer rubber glove box protective glove after demolding; placing the single-layer rubber glove box protective glove on a similar immersion molding mold, immersing it in a coagulant for 10~20s, removing it and drying it in an oven; then immersing it in a compound latex for 10~50s, removing it and drying it in an oven; filtering the protective glove in a water bath at 70~100℃ for 5~10min; then vulcanizing it in an oven at 110~130℃ for 20~40min to obtain a local latex coating; adjusting the thickness of the local latex coating by repeating the steps of immersion in coagulant-drying-immersion in compound latex-drying.

[0036] This invention allows for the creation of localized latex coatings of varying thicknesses by adjusting the number of immersions and the duration of the latex.

[0037] The preparation method of the rubber sheet of the present invention includes the following steps: weighing each raw material according to the component ratio in the molding rubber layer; feeding the rubber into an internal mixer for plasticizing, preferably for 1 minute; adding plasticizer, antioxidant, lubricant, release agent, and activator for a first mixing, preferably for 2 minutes; adding reinforcing filler and shielding component for a second mixing, and discharging the rubber when the temperature reaches 110~140℃; thinning and sheeting on an open mill to obtain section A compound rubber, and letting it cool, preferably for ≥8 hours; feeding section A compound rubber, vulcanizing agent, and accelerator into an internal mixer for a third mixing, and discharging the rubber when the temperature reaches 80~110℃; thinning and stripping on an open mill to obtain section B compound rubber strip; feeding section B compound rubber strip into a calender and calendering it into a sheet of fixed thickness, and then cooling and winding or cutting to obtain the rubber sheet. The thickness of the rubber sheet of the present invention is preferably 1~3mm.

[0038] The coagulant of the present invention is preferably an ethanol solution of calcium chloride, calcium nitrate or zinc chloride, with a mass concentration of 5-30%.

[0039] The preparation method of the compound latex of the present invention includes the following steps: weighing each raw material according to the dry mass ratio of each component in the compound latex; adding the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, defoamer, colorant dispersion, and accelerator dispersion to the latex in sequence, stirring evenly, and then letting the mixture stand at room temperature for more than 24 hours; then adding the vulcanizing agent dispersion, stirring evenly, and further adjusting the viscosity of the compound latex by adding deionized water and thickener to obtain a compound latex with a viscosity of 200~1000 mPa·s; after obtaining the compound latex with the required viscosity, filtering it through a three-layer 80-mesh filter for later use.

[0040] The preparation method of the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, colorant dispersion, vulcanizing agent dispersion, and accelerator dispersion of the present invention includes the following steps: Stabilizer and dispersant are divided into six portions according to the mass ratio of antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator; each portion is added to deionized water along with the antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator to prepare six aqueous solutions with a mass concentration of 10-40% for each of the antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator; the six aqueous solutions are then placed in a ball mill jar for wet ball milling at a ball-to-material mass ratio of 9:2 for 1-3 hours to obtain the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, colorant dispersion, vulcanizing agent dispersion, and accelerator dispersion.

[0041] Because the above six additives are prone to agglomeration and difficult to disperse uniformly in latex, this invention first prepares the six additives into an additive dispersion before adding them to the latex to improve the uniformity of dispersion. The purpose of using stabilizers and dispersants in this invention is to improve the dispersibility of the six additives in deionized water and in latex. Therefore, to fully utilize the effects of stabilizers and dispersants, it is preferable to distribute the stabilizers and dispersants according to the dry weight ratio of the six additives, so that the amount of stabilizers and dispersants in the six portions is proportional to the amount of the six additives used.

[0042] This invention significantly improves the mechanical hazard protection performance of the glove box protective gloves, both overall and in specific areas, by optimizing the design of the formulation components of the single-layer rubber protective gloves and the impregnated latex, as well as adjusting and controlling the number of impregnation times and time.

[0043] The present invention will now be described in more detail with reference to exemplary embodiments. The following embodiments or experimental data are intended to illustrate the present invention by way of example, and those skilled in the art should understand that the present invention is not limited to these embodiments or experimental data.

[0044] Example 1The preparation of a rubber glove box protective glove with a latex coating includes the following steps: S1. Preparation of rubber sheet: Weigh each raw material according to the component ratio in the molding rubber layer. The molding rubber layer includes the following components: 100 parts butyl rubber (rubber), 240 parts tungsten powder (shielding component), 15 parts carbon black N110 (reinforcing filler), 8 parts zinc oxide (activator), 1 part antioxidant D (antioxidant), 8 parts naphthenic oil (plasticizer), 5 parts stearic acid (plasticizer), 4 parts paraffin wax (lubricant and release agent), 8 parts sericite powder (filler), 2 parts nanofiber powder (filler), 0.5 parts sulfur (vulcanizing agent), 1 part thiuram accelerator TBzTD (accelerator), and 1 part thiazole accelerator MBTS. 1.5 parts (accelerator); Rubber is added to an internal mixer and plasticized for 1 min; Plasticizer naphthenic oil and stearic acid, antioxidant D, lubricant and release agent paraffin wax, and activator zinc oxide are added for a first mixing for 2 min; Reinforcing filler carbon black N110, shielding component tungsten powder, filler sericite powder and nanofiber powder are added for a second mixing, and the rubber is discharged when the temperature reaches 130℃; Thin-pass and sheet-forming are performed on an open mill to obtain section A compound rubber, which is then left to cool for 8 h; Section A compound rubber, vulcanizing agent sulfur, accelerator TBzTD and MBTS are added to an internal mixer for a third mixing, and the rubber is discharged when the temperature reaches 105℃; Thin-pass and strip-forming are performed on an open mill to obtain section B compound rubber strip; Section B compound rubber strip is added to a calender and calendered into a sheet of fixed thickness, cooled and then wound up to obtain a rubber sheet with a thickness of about 2 mm.

[0045] S2. Molding preparation of single-layer rubber glove box protective gloves: Rubber sheet is laid flat on the surface of glove molding mold, and high temperature molding and vulcanization is carried out at 160℃ for 15 minutes. After demolding, single-layer rubber glove box protective gloves are obtained with a thickness of 0.83mm.

[0046] S3. Preparation of Compound Latex S3-1. Weighing Raw Materials Weigh each raw material according to the dry mass ratio of each component in the compound latex. The latex includes the following components: 100 parts nitrile latex (latex), 15 parts silica (reinforcing filler), 5 parts potassium hydroxide (stabilizer), 3 parts casein (stabilizer), 9 parts dispersant NF (dispersant), 8 parts zinc oxide (activator), 1 part antioxidant D (antioxidant), 3 parts sulfur (vulcanizing agent), and 1 part accelerator TMTD. 3 parts (accelerator), 0.08 parts sodium polyacrylate (thickener), 0.3 parts silicone oil (defoamer), 1 part titanium dioxide (colorant); S3-2. Preparation of the additive dispersion: According to the mass ratio of antioxidant D, reinforcing filler silica, activator zinc oxide, colorant titanium dioxide, vulcanizing agent sulfur, and accelerator TMTD, the stabilizer potassium hydroxide, casein, and dispersant NF are divided into six parts, and then added to deionized water respectively with antioxidant D, reinforcing filler silica, activator zinc oxide, colorant titanium dioxide, vulcanizing agent sulfur, and accelerator TMTD to obtain an antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator, each with a mass concentration of 25%. Six aqueous solutions were prepared. The six aqueous solutions were placed in a ball mill jar and wet-milled at a ball-to-material mass ratio of 9:2 for 2 hours to obtain an antioxidant dispersion, a reinforcing filler dispersion, an activator dispersion, a colorant dispersion, a vulcanizing agent dispersion, and an accelerator dispersion. S3-3. Latex Preparation: The antioxidant dispersion, reinforcing filler dispersion, activator dispersion, defoamer silicone oil, colorant dispersion, and accelerator dispersion were added to the latex in sequence and stirred evenly. The mixture was then left to stand at room temperature for 24 hours. The vulcanizing agent dispersion was then added and stirred evenly. The viscosity of the compound latex was adjusted by adding deionized water and sodium polyacrylate thickener to obtain a compound latex with a viscosity of 600 mPa·s. The latex was then filtered through a three-layer 80-mesh filter for later use.

[0047] S4. Prepare a coagulant by preparing an 18% zinc chloride ethanol solution.

[0048] S5. Preparation of local latex coating by impregnation: Place the single-layer rubber glove box protective glove on the same type of impregnation mold, immerse it in the coagulant for 15 seconds, remove it and dry it in a 70℃ oven; then immerse it in the compound latex for 30 seconds, remove it and dry it in a 90℃ oven; repeat the steps of immersion in coagulant-drying-immersion in compound latex-drying 5 times, and after completion, dry it in a 90℃ oven for 30 minutes; filter the protective glove in a 90℃ water bath for 8 minutes; then place it in a 120℃ oven for vulcanization for 30 minutes to obtain a local latex coating. The total thickness of the protective glove in the local latex coating area is about 1.22 mm.

[0049] Example 2The preparation of a rubber glove box protective glove with a latex coating includes the following steps: S1. Preparation of rubber sheet: Weigh each raw material according to the component ratio in the molding rubber layer. The molding rubber layer includes the following components: 100 parts of chloroprene rubber (rubber), 100 parts of bismuth trioxide (shielding component), 5 parts of carbon black N330 (reinforcing filler), 3 parts of magnesium oxide (activator), 0.5 parts of antioxidant 4020 (antioxidant), 5 parts of petroleum resin (plasticizer), 1 part of surfactant 935P (lubricating release agent), 3 parts of talc (filler), 2 parts of titanium dioxide (filler), and thiazole accelerator DM. 0.5 parts (accelerator), 3 parts (zinc oxide, vulcanizing agent); put the rubber into a mixer and plasticize for 1 min; add plasticizer petroleum resin, antioxidant 4020, lubricant release agent surfactant 935P, and surfactant magnesium oxide for a first mixing for 2 min; add reinforcing filler carbon black N330, shielding component bismuth trioxide, filler talc and titanium dioxide for a second mixing, and discharge the rubber when the temperature reaches 110℃; pass through a two-roll mill and sheet to obtain section A compound rubber, and let it cool for 9 h; put section A compound rubber, accelerator DM, and vulcanizing agent zinc oxide into a mixer for a third mixing, and discharge the rubber when the temperature reaches 80℃; pass through a two-roll mill and strip to obtain section B compound rubber strip; put section B compound rubber strip into a calender and calender into a sheet of fixed thickness, cool and then wind it to obtain a rubber sheet with a thickness of about 2 mm.

[0050] S2. Molding preparation of single-layer rubber glove box protective gloves: Rubber sheet is laid flat on the surface of glove molding mold, and high temperature molding and vulcanization is carried out at 140℃ for 25 minutes. After demolding, single-layer rubber glove box protective gloves are obtained with a thickness of 0.90mm.

[0051] S3. Preparation of Compound Latex S3-1. Weighing Raw Materials Weigh each raw material according to the dry weight ratio of each component in the compound latex. The latex includes the following components: 80 parts natural rubber latex (latex), 20 parts chloroprene latex (latex), 5 parts silica (reinforcing filler), 1 part dimethylamine (stabilizer), 3 parts dispersant NF (dispersant), 3 parts zinc stearate (activator), 0.5 parts antioxidant 4020 (antioxidant), 0.5 parts sulfur (vulcanizing agent), and 0.5 parts accelerator DM. 1 part (accelerator), 0.05 parts polyvinyl alcohol (thickener), 0.05 parts silicone oil (defoamer), 0.1 parts titanium dioxide (colorant); S3-2. Preparation of additive dispersion: According to the mass ratio of antioxidant 4020, reinforcing filler N330, activator zinc stearate, colorant titanium dioxide, vulcanizing agent sulfur, and accelerator DM, the stabilizer dimethylamine and dispersant NF are divided into six parts, and then added to deionized water respectively with antioxidant 4020, reinforcing filler N330, activator zinc stearate, colorant titanium dioxide, vulcanizing agent sulfur, and accelerator DM to obtain the antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator at the following mass concentrations. Six aqueous solutions of 10% were prepared. The six aqueous solutions were placed in a ball mill jar and wet-milled at a ball-to-material mass ratio of 9:2 for 1 hour to obtain dispersions of antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator. S3-3. Latex preparation: The antioxidant, reinforcing filler, activator, defoamer (silicone oil), colorant, and accelerator dispersions were added to the latex in sequence and stirred until homogeneous. The mixture was then left to stand at room temperature for 24 hours. The vulcanizing agent dispersion was added and stirred until homogeneous. The viscosity of the compound latex was adjusted by adding deionized water and thickener (polyvinyl alcohol) to obtain a compound latex with a viscosity of approximately 200 mPa·s. The latex was then filtered through a three-layer 80-mesh filter for later use.

[0052] S4. Prepare a coagulant by preparing a 5% (w / w) calcium chloride ethanol solution.

[0053] S5. Preparation of local latex coating by impregnation: Place the single-layer rubber glove box protective glove on the same type of impregnation molding mold, immerse it in the coagulant for 10 seconds, remove it and dry it in a 60℃ oven; then immerse it in the compound latex for 10 seconds, remove it and place it in an 80℃ oven; repeat the steps of immersion in coagulant-drying-immersion in compound latex-drying 5 times, and after completion, dry it in an 80℃ oven for 1 hour; filter the protective glove in a 70℃ water bath for 10 minutes; then place it in a 110℃ oven for vulcanization for 40 minutes to obtain a local latex coating. The total thickness of the protective glove in the local latex coating area is about 1.12 mm.

[0054] Example 3The preparation of rubber glove box protective gloves with latex coating includes the following steps: S1. Preparation of rubber sheet: Weigh each raw material according to the component ratio in the molding rubber layer. The molding rubber layer includes the following components: 100 parts of EPDM rubber (rubber), 400 parts of ferric oxide (shielding component), 25 parts of silica (reinforcing filler), 13 parts of zinc oxide (activator), 2 parts of antioxidant 2246 (antioxidant), 15 parts of paraffin oil (plasticizer), 5 parts of paraffin wax (plasticizer), 6 parts of stearic acid (lubricating and release agent), 13 parts of clay (filler), 2 parts of nanofiber powder (filler), 5 parts of sulfur (vulcanizing agent), 2 parts of thiuram-based accelerator TMTD (accelerator), and 2 parts of thiazole-based accelerator DM. 2 parts (accelerator); put the rubber into a mixer and plasticize for 1 minute; add plasticizer paraffin oil and paraffin, antioxidant 2246, lubricant and release agent stearic acid, and activator zinc oxide for a first mixing for 2 minutes; add reinforcing filler silica, shielding component iron oxide, filler clay and nanofiber powder for a second mixing, and discharge the rubber when the temperature reaches 140℃; pass through a two-roll mill and sheet to obtain section A compound rubber, and let it stand and cool for 10 hours; put section A compound rubber, vulcanizing agent sulfur, accelerator TMTD and DM into a mixer for a third mixing, and discharge the rubber when the temperature reaches 110℃; pass through a two-roll mill and strip to obtain section B compound rubber strip; put section B compound rubber strip into a calender and calender into a sheet of fixed thickness, cool and then roll it up to obtain a rubber sheet with a thickness of about 2mm.

[0055] S2. Molding preparation of single-layer rubber glove box protective gloves: Rubber sheet is laid flat on the surface of glove molding mold, and high temperature molding and vulcanization is carried out at 170℃ for 10 minutes. After demolding, single-layer rubber glove box protective gloves are obtained with a thickness of 0.96mm.

[0056] S3. Preparation of Compound Latex S3-1. Weighing Raw Materials Weigh each raw material according to the dry weight ratio of each component in the compound latex. The latex includes the following components: 100 parts styrene-butadiene latex (latex), 15 parts calcium carbonate (reinforcing filler), 10 parts sericite (reinforcing filler), 10 parts potassium hydroxide (stabilizer), 5 parts gelatin (stabilizer), 15 parts dispersant NF (dispersant), 13 parts zinc carbonate (activator), 2 parts antioxidant 2246 (antioxidant), 5 parts sulfur (vulcanizing agent), and TMTD accelerator. 5 parts (accelerator), 1 part polyacrylamide (thickener), 0.5 parts silicone oil (defoamer), 2 parts titanium dioxide (colorant); S3-2. Preparation of additive dispersion: According to the weight ratio of antioxidant 2246, reinforcing fillers calcium carbonate and sericite, activator zinc carbonate, colorant titanium dioxide, vulcanizing agent sulfur, and accelerator TMTD, the stabilizer potassium hydroxide and gelatin, and the dispersing agent NF are divided into six parts, and then added to deionized water respectively with antioxidant 2246, reinforcing fillers calcium carbonate and sericite, activator zinc carbonate, colorant titanium dioxide, vulcanizing agent sulfur, and accelerator TMTD to obtain the mass concentration of antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator. Six aqueous solutions, each at 40%, were prepared. These solutions were then wet-milled in a ball mill jar at a ball-to-material mass ratio of 9:2 for 3 hours to obtain dispersions of antioxidants, reinforcing fillers, activators, colorants, vulcanizing agents, and accelerators. S3-3. Latex Preparation: The antioxidant, reinforcing filler, activator, defoamer (silicone oil), colorant, and accelerator dispersions were added to the latex in sequence and stirred until homogeneous. The mixture was then left to stand at room temperature for 24 hours. The vulcanizing agent dispersion was added, and the mixture was stirred until homogeneous. Deionized water and polyacrylamide (a thickener) were then added to adjust the viscosity of the latex, resulting in a latex with a viscosity of 1000 mPa·s. The latex was then filtered through a three-layer 80-mesh filter for later use.

[0057] S4. Prepare a coagulant solution of calcium nitrate in ethanol with a mass concentration of 30%.

[0058] S5. Preparation of local latex coating by impregnation: Place the single-layer rubber glove box protective glove on the same type of impregnation mold, immerse it in the coagulant for 20 seconds, remove it and dry it in an 80℃ oven; then immerse it in the compound latex for 50 seconds, remove it and dry it in a 90℃ oven; repeat the steps of immersion in coagulant-drying-immersion in compound latex-drying 5 times, and after completion, dry it in a 90℃ oven for 1 hour; filter the protective glove in a 95℃ water bath for 5 minutes; then place it in a 130℃ oven for vulcanization for 20 minutes to obtain a local latex coating. The total thickness of the protective glove in the local latex coating area is about 1.50 mm.

[0059] Comparative Example 1The preparation of a rubber glove box protective glove with a latex coating includes the following steps: S1. Preparation of rubber sheet: Weigh each raw material according to the component ratio in the molding rubber layer. The molding rubber layer includes the following components: 100 parts butyl rubber (rubber), 240 parts tungsten powder (shielding component), 15 parts carbon black N110 (reinforcing filler), 8 parts zinc oxide (activator), 1 part antioxidant D (antioxidant), 8 parts naphthenic oil (plasticizer), 5 parts stearic acid (plasticizer), 8 parts sericite powder (filler), 2 parts nanofiber powder (filler), 4 parts paraffin wax (lubricating and mold release agent), 0.5 parts sulfur (vulcanizing agent), 1 part thiuram accelerator TBzTD (accelerator), and 1 part thiazole accelerator MBTS. 1.5 parts (accelerator); Rubber is added to an internal mixer and plasticized for 1 min; Plasticizer naphthenic oil and stearic acid, antioxidant D, lubricant and release agent paraffin wax, and activator zinc oxide are added for a first mixing for 2 min; Reinforcing filler carbon black N110, shielding component tungsten powder, filler sericite powder and nanofiber powder are added for a second mixing, and the rubber is discharged when the temperature reaches 130℃; Thin-pass and sheet-forming are performed on an open mill to obtain section A compound rubber, which is then left to cool for 8 h; Section A compound rubber, vulcanizing agent sulfur, accelerator TBzTD and MBTS are added to an internal mixer for a third mixing, and the rubber is discharged when the temperature reaches 105℃; Thin-pass and strip-forming are performed on an open mill to obtain section B compound rubber strip; Section B compound rubber strip is added to a calender and calendered into a sheet of fixed thickness, cooled and then wound up to obtain a rubber sheet with a thickness of about 2 mm.

[0060] S2. Molding preparation of single-layer rubber glove box protective gloves: Rubber sheet is laid flat on the surface of glove molding mold, and high temperature molding and vulcanization is carried out at 160℃ for 15 minutes. After demolding, single-layer rubber glove box protective gloves are obtained with a thickness of 0.83mm.

[0061] Hazard protection performance testing and analysis of protective gloves The radiation and mechanical hazard protection performance of the rubber glove boxes manufactured in Examples 1-3 and Comparative Example 1 was tested, and the test results are shown in Table 1.

[0062] Table 1. Test results of radiation and mechanical hazard protection performance of the protective gloves in the examples and comparative examples.

[0063] It should be noted that the lead equivalent used in this invention 60Co was used as the radiation source, and the radiation shielding performance was tested according to standard GB6Z / T 147-2002. The airtightness of the protective gloves was tested according to standard EJ / T 1096-1999, with the highest airtightness level being Class 1. The hardness of the protective gloves was tested according to standard GB / T 531.1-2008. The tear resistance, puncture resistance, cut resistance, and abrasion resistance of the molded rubber layer substrate and the local latex coating area of ​​the protective gloves were tested according to standard GB 24541-2022. Table 1 shows the tests conducted on the palm area of ​​the single-layer rubber glove box protective gloves with local latex coating in each embodiment, and the comparative examples also show the tests conducted on the palm area of ​​the single-layer rubber glove box protective gloves.

[0064] As shown in Table 1, the present invention optimizes the component ratio of the molded rubber layer, resulting in protective gloves that not only have excellent radiation shielding performance but also significantly improved mechanical properties. Because Comparative Example 1 did not impregnate the surface of the single-layer rubber glove box protective gloves with a latex coating, the mechanical properties of the gloves in Comparative Example 1 were significantly lower than those in Examples 1-3.

[0065] Furthermore, by comparing the radiation shielding performance and mechanical properties of the coating area and the molded rubber layer in each embodiment in Table 1, it can be found that the present invention prepares a local latex coating in the local area of ​​the rubber glove where additional mechanical hazard protection is required through a latex impregnation process. Moreover, the local latex coating is tightly bonded to the rubber substrate, which significantly enhances the mechanical hazard protection performance of the local area of ​​the protective glove and effectively improves the service life of the rubber glove box protective glove in the dual hazard scenarios of radiation and mechanical damage.

[0066] All raw materials used in this invention are commercially available and can be purchased from retail sources. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rubber glove box protective glove with a latex coating, characterized in that, It includes a molded rubber layer and a partial latex coating; the molded rubber layer comprises the following components in parts by weight: 100 parts rubber, 50-400 parts shielding component, 5-25 parts reinforcing filler, 5-15 parts filler, 3-13 parts activator, 0.5-2 parts antioxidant, 5-20 parts plasticizer, 1-6 parts lubricating release agent, 0.5-5 parts vulcanizing agent, and 1-4 parts accelerator; The local latex coating is obtained by latex impregnation, and the latex comprises the following components by weight on a dry basis: 100 parts latex, 5-25 parts reinforcing filler, 1-15 parts stabilizer, 3-15 parts dispersant, 3-13 parts activator, 0.5-2 parts antioxidant, 0.5-5 parts vulcanizing agent, 1-5 parts accelerator, 0.05-1 part thickener, 0.05-0.5 parts defoamer, and 0.1-2 parts colorant.

2. The rubber glove box protective glove according to claim 1, characterized in that, The rubber is selected from at least one of butyl rubber, halogenated butyl rubber, chloroprene rubber, ethylene propylene diene monomer (EPDM) rubber, and chlorosulfonated polyethylene rubber.

3. The protective glove for the rubber glove box according to claim 1, characterized in that, The latex is selected from at least one of natural latex, nitrile latex, carboxylated nitrile latex, styrene-butadiene latex, chloroprene latex, and butyl latex.

4. The rubber glove box protective glove according to claim 1, characterized in that, The shielding component includes at least one of tungsten, tungsten oxide, tungsten pentaboride, tungsten boride, iron tetroxide, bismuth, and bismuth trioxide.

5. The protective glove for the rubber glove box according to claim 1, characterized in that, For the molded rubber layer, the reinforcing filler includes at least one of carbon black and silica; for the partial latex coating, the reinforcing filler is selected from at least one of calcium carbonate, kaolin, carbon black, silica, and sericite.

6. The protective glove for the rubber glove box according to claim 1, characterized in that, The filler is selected from at least one of talc, clay, barium sulfate, calcium carbonate, sericite, titanium dioxide, and nanofibers.

7. A method for manufacturing protective gloves for a rubber glove box with a latex coating, characterized in that, The rubber glove box protective glove with latex coating is the protective glove as described in any one of claims 1-6. The manufacturing method includes: laying a rubber sheet flat on the surface of a glove molding mold, molding and vulcanizing it at a high temperature of 140~170℃, and obtaining a single-layer rubber glove box protective glove after demolding; placing the single-layer rubber glove box protective glove on a similar immersion molding mold, immersing it in a coagulant, removing it and drying it, then immersing it in a compound latex, removing it and drying it again; filtering the protective glove in a water bath, and then vulcanizing it to obtain a local latex coating; adjusting the thickness of the local latex coating by repeating the steps of immersion in coagulant-drying-immersion in compound latex-drying.

8. The method for manufacturing protective gloves for a rubber glove box according to claim 7, characterized in that, The method for preparing the rubber sheet includes: weighing each raw material according to the component ratio in the molding rubber layer; feeding the rubber into an internal mixer for plasticizing; then adding plasticizer, antioxidant, lubricant, release agent, and activator for a first mixing; then adding reinforcing filler, shielding component, and filler for a second mixing; discharging the rubber when the temperature reaches 110~140℃; passing the rubber through a two-roll mill and extruding it into sheets to obtain section A compound rubber; after cooling, feeding section A compound rubber, vulcanizing agent, and accelerator into an internal mixer for a third mixing; discharging the rubber when the temperature reaches 80~110℃; passing the rubber through a two-roll mill and extruding it into strips to obtain section B compound rubber strips; feeding section B compound rubber strips into a calender and calendering them into sheets of a fixed thickness; and then cooling them before winding or cutting them to obtain the rubber sheet.

9. The method for manufacturing protective gloves for a rubber glove box according to claim 7, characterized in that, The coagulant is an ethanol solution of calcium chloride, calcium nitrate, or zinc chloride, with a mass concentration of 5-30%.

10. The method for manufacturing protective gloves for a rubber glove box according to claim 7, characterized in that, The preparation method of the compound latex includes: weighing each raw material according to the dry mass ratio of each component in the latex, adding the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, defoamer, colorant dispersion, accelerator dispersion, and vulcanizing agent dispersion to the latex in sequence, stirring evenly, adding deionized water and thickener to adjust the viscosity of the compound latex, and obtaining a compound latex with a viscosity of 200~1000 mPa·s.

11. The method for manufacturing protective gloves for a rubber glove box according to claim 10, characterized in that, The preparation method of the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, colorant dispersion, vulcanizing agent dispersion, and accelerator dispersion includes: dividing the stabilizer and dispersant into six parts according to the mass ratio of antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator, and adding them respectively to deionized water to prepare six aqueous solutions with a mass concentration of 10-40% for each of the antioxidant, reinforcing filler, activator, colorant, vulcanizing agent, and accelerator; and ball milling the six aqueous solutions to obtain the antioxidant dispersion, reinforcing filler dispersion, activator dispersion, colorant dispersion, vulcanizing agent dispersion, and accelerator dispersion.

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