Acid and alkali permeation resistant protective gloves for glove box and preparation method of acid and alkali permeation resistant protective gloves

Abstract

The invention relates to an acid-base permeation-resistant protective glove for a glove box and a preparation method thereof, the glove adopts ethylene propylene diene monomer, butyl rubber, halogenated butyl rubber, chloroprene rubber, chlorosulfonated polyethylene rubber and other base materials to significantly improve the acid-base resistance and mechanical properties of the glove, and the glove is especially suitable for strong corrosive environments such as concentrated nitric acid and the like. The preparation method comprises a multi-step mixing process, the shielding component, the reinforcing filler and the filler are reasonably configured, and the particle size of the shielding component is controlled, so that the shielding component is uniformly dispersed in the rubber, and the permeation resistance of the glove is effectively improved. In addition, the wear-resistant furnace black, the white carbon black, the PTFE, the high-density polyethylene, the ultra-high molecular weight polyethylene and other fillers are selected, so that the glove has a higher wear-resistant grade (grade 4), and the service life is prolonged. The preparation method of the glove is simple and easy to implement, and the finished product has excellent acid and alkali permeability resistance, mechanical property, wear resistance and radiation protection property.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear radiation protection materials, and in particular to an acid- and alkali-resistant protective glove for a glove box and a preparation method thereof. Background Art

[0002] Highly wear-resistant radiation hazard glove box protective gloves that are resistant to acid and alkali penetration have important applications in the nuclear industry and nuclear technology, especially in complex environments where radioactive materials and mechanical damage coexist. With the development of the nuclear industry, the demand for the operation and handling of radioactive materials in scenarios such as nuclear fuel processing, nuclear waste treatment, and nuclear power plant maintenance is increasing. Safe and efficient protection measures have become the key to protecting operators from radiation and chemical corrosion.

[0003] At present, the application of glove box protective gloves is mainly concentrated in the following aspects: (1) In the nuclear industry, they are used in industrial scenarios such as nuclear fuel processing, nuclear waste treatment and nuclear power plant maintenance; (2) In scientific research and production, protective gloves are used to protect operators during experiments using radioactive materials, radiation instruments, chemical reagents or mechanical hazards; (3) In the medical field, during the development and treatment of radioactive drugs, gloves are used to protect medical staff from radiation damage. The operation methods of gloves mainly include glove box operation and use with the middle sleeve to maintain negative pressure in the box and filter radioactive gases to ensure safety.

[0004] Although existing gloves can provide a certain degree of protection, in actual use scenarios, gloves need to resist multiple hazardous factors such as radiation, acid and alkali reagents, strong oxidizing reagents and organic reagents. Especially in operations involving highly corrosive chemicals such as 96% sulfuric acid, different concentrations of nitric acid, hydrochloric acid, hydrofluoric acid, acetic acid and sodium hydroxide, and requiring the grasping of rough tools, gloves must not only be resistant to acids and alkalis, but also have extremely high wear resistance. However, gloves that are not corrosion-resistant are prone to aging, resulting in protection failure, and gloves that are not wear-resistant are very easy to wear out during high-frequency use and cannot meet long-term safety protection needs.

[0005] Existing protective gloves face the following problems: Existing technologies are difficult to meet the needs in complex environments. The published patent CN 117757168A introduces a glove box radiation protection glove, which uses chloroprene and EPDM as rubber substrates, but the patent does not specify the types of vulcanizing agents required for EPDM vulcanization, such as sulfur, peroxide or resin vulcanizing agents, and accelerators (such as thiurams, thiazoles, sulfonamides, etc.), so it is difficult to achieve the best vulcanization effect in practical applications. In addition, the chloroprene rubber used in the prior art is easily powdered after being soaked in high-concentration nitric acid, resulting in a significant decrease in mechanical properties. In order to increase flexibility, a large amount of ester and oil plasticizers are used in the formula, which further reduces the acid and alkali resistance of the gloves, making it difficult to use them effectively for a long time in nuclear industry sites.

[0006] The current industry standard GB38452 "Hand Protection Gloves for Ionizing Radiation and Radioactive Contaminants" requires only a wear resistance level of 1 and a penetration resistance level of 2, but the actual use environment such as the nuclear industry requires gloves to have a wear resistance of 3-4 and a penetration resistance of 4. Existing glove penetration tests are mostly for 96% sulfuric acid and 40% sodium hydroxide, but the performance of existing protective gloves is still difficult to meet the requirements for a variety of acid and alkali chemicals in nuclear industry applications. Therefore, there is an urgent need for a glove that can perform well in terms of radiation resistance, acid and alkali penetration resistance, and wear resistance to better protect the safety of workers and extend the service life of the gloves.

[0007] In view of the above problems, the present invention is proposed. Summary of the invention

[0008] The invention discloses an acid and alkali penetration resistant protective glove for a glove box and a preparation method thereof, aiming to solve the technical problems existing in the prior art.

[0009] According to one aspect of the present invention, there is provided a method for preparing acid and alkali penetration resistant protective gloves for a glove box, comprising the following steps:

[0010] S1: Weigh the raw materials as follows: 100 parts of rubber, 0-500 parts of shielding component, 5-35 parts of reinforcing filler, 5-20 parts of filler, 3-13 parts of activator, 0.5-2 parts of antioxidant, 5-20 parts of plasticizer, 1-6 parts of lubricating release agent, 0.5-20 parts of vulcanizing agent, and 1-4 parts of accelerator;

[0011] S2: performing a first plasticizing process on the rubber to obtain a first plasticized product;

[0012] S3: adding a plasticizer, an antioxidant, a lubricating release agent and an active agent to the first plasticized product for first mixing to obtain a first mixed product;

[0013] S4: adding a shielding component, a reinforcing filler and a filler to the first mixed product for a second mixing to obtain a second mixed product, performing a thin layer grinding treatment on the second mixed product and pressing it into a sheet to obtain a stage A mixed film;

[0014] S5: performing a third mixing process on the mixed rubber sheet, accelerator and vulcanizer of stage A, and performing thin layer processing and stripping to obtain the mixed rubber strip of stage B;

[0015] S6: rolling the mixed rubber strip of stage B into a sheet, and rolling or cutting it after cooling to room temperature to obtain a sheet;

[0016] S7: placing the sheet in a glove mold for compression vulcanization, and demolding to obtain acid and alkali resistant protective gloves;

[0017] The particle size of the shielding component ranges from 20 nm to 20 μm to ensure uniform dispersion in the rubber and enhance the anti-penetration performance.

[0018] As a preferred technical solution, the temperature of the first plasticizing is 60-100°C, and the time is 30s-2min; the temperature of the first mixing is 70-120°C, and the time is 1-3min; the temperature of the second mixing is 100-160°C, and the time is 2-6min; the temperature of the third mixing is 70-110°C, and the time is 30s-4min.

[0019] As a preferred technical solution, in step S4, after the mixed film of section A is obtained, it is parked for ≥8 hours.

[0020] As a preferred technical solution, in step S7, the temperature of the compression vulcanization is 150-170° C. and the time is 8-15 minutes.

[0021] As a preferred technical solution, the rubber is one or more of the following blended composite rubbers: EPDM rubber, butyl rubber, halogenated butyl rubber, chloroprene rubber, and chlorosulfonated polyethylene rubber.

[0022] As a preferred technical solution, when the rubber is chloroprene rubber, chlorosulfonated polyethylene rubber, or a blended composite rubber containing chloroprene rubber and chlorosulfonated polyethylene rubber, the activating agent is the same as the vulcanizing agent.

[0023] As a preferred technical solution, the shielding component is lead-free, including one or more of tungsten, tungsten oxide, tungsten pentaboride, tungsten boride, ferroferric oxide, bismuth, and bismuth trioxide.

[0024] As a preferred technical solution, the reinforcing filler is at least one of wear-resistant furnace black and white carbon black.

[0025] As a preferred technical solution, the wear-resistant furnace black adopts one or more of N110, N220 and N330.

[0026] As a preferred technical solution, the filler is one or more of talcum powder, clay, titanium dioxide, barium sulfate, PTFE, high-density polyethylene, and ultra-high molecular weight polyethylene.

[0027] As a preferred technical solution, the plasticizer is a resin plasticizer.

[0028] As a preferred technical solution, the plasticizer is one or more of C5 petroleum resin, C9 petroleum resin, and coumarone resin.

[0029] As a preferred technical solution, the lubricating release agent is one or more of paraffin, surfactant, fatty acid, and fatty acid salt.

[0030] As a preferred technical solution, the vulcanizing agent is one or more of sulfur, peroxide, reactive phenolic resin, and active oxide.

[0031] As a preferred technical solution, the accelerator is one or more of thiurams, thiazoles, sulfenamides, dithiocarbamates, guanidines, thiophosphates, and thioureas.

[0032] According to another aspect of the present invention, there is also provided an acid and alkali penetration resistant protective glove for a glove box, which is prepared by the above-mentioned preparation method.

[0033] The technical solution adopted by the present invention can achieve at least one of the following beneficial effects:

[0034] 1. The present invention adopts a glove material of specific components, with one or more of EPDM rubber, butyl rubber, halogenated butyl rubber, chloroprene rubber and chlorosulfonated polyethylene rubber as the base material, which significantly improves the acid and alkali resistance of the gloves, especially in the strong corrosive environment such as concentrated nitric acid, so that the gloves have excellent performance in harsh chemical environments and are suitable for a variety of experiments and industrial uses.

[0035] 2. The glove material used in the present invention provides acid and alkali resistance without sacrificing mechanical properties, so that the gloves have good flexibility and high tear resistance, puncture resistance and cutting resistance, reaching at least one level of mechanical protection. These properties enable the gloves to provide safe and reliable protection in harsh operating environments.

[0036] 3. The present invention controls the particle size of the shielding component between 20 nm and 20 μm to ensure its uniform dispersion in the rubber, thereby effectively improving the anti-penetration performance of the gloves, especially being able to effectively block acid and alkali penetration, ensuring that the gloves still maintain efficient protective functions under long-term use.

[0037] 4. The reinforcing filler of the present invention uses wear-resistant furnace black and white carbon black, and the filler uses talcum powder, PTFE (polytetrafluoroethylene), high-density polyethylene and ultra-high molecular polyethylene, which significantly improves the wear resistance level of the gloves to level 4. This high wear resistance extends the service life of the gloves, especially showing longer durability in high-frequency operating environments.

[0038] 5. By adjusting the content of shielding components, the protection ability of the gloves against gamma rays can be adjusted within the range of 0-0.25mmPb, providing more options for special applications that require radiation protection and a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0040] Figure 1 The present invention is a schematic diagram of the preparation process of an acid and alkali penetration resistant protective glove for a glove box. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0042] Unless expressly indicated to the contrary, the numerical parameters in this specification and the appended claims may be approximate values ​​and can be changed according to the desired properties obtained by the content of the present invention. Specifically, all numbers used in the specification and claims to express the content of the composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases. In general, the meaning of the expression is to include a change of ±10% in some embodiments, a change of ±5% in some embodiments, a change of ±1% in some embodiments, and a change of ±0.5% in some embodiments by a specific number.

[0043] Furthermore, the word "comprising" does not exclude the presence of materials or steps not listed in the claims. Ordinal numbers such as "first", "second", "third" and Arabic numerals, letters, etc. used in the specification and claims to modify corresponding elements or steps do not themselves mean the order of the manufacturing method. The use of these ordinals is only used to make the steps clearly distinguishable.

[0044] In addition, unless the steps are specifically described or must occur in sequence, the order of the above steps is not limited to the above list, and can be changed or rearranged according to the required design. And the above embodiments can be mixed and matched with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments.

[0045] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In order to solve the problems existing in the prior art, an embodiment of the present invention provides an acid and alkali penetration resistant protective glove for a glove box and a preparation method thereof.

[0047] The protective gloves used in the present invention are composed of the following raw materials:

[0048] Calculated by mass: 100 parts of rubber, 0-500 parts of shielding components, 5-35 parts of reinforcing fillers, 5-20 parts of fillers, 3-13 parts of active agents, 0.5-2 parts of antioxidants, 5-20 parts of plasticizers, 1-6 parts of lubricating release agents, 0.5-20 parts of vulcanizing agents, and 1-4 parts of accelerators.

[0049] like Figure 1 As shown, a method for preparing acid and alkali penetration resistant protective gloves for a glove box comprises the following steps:

[0050] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0051] First mastication step S2: putting 100 parts of the raw rubber into an internal mixer for first mastication to obtain a first masticated product;

[0052] First mixing step S3: adding 5-20 parts of plasticizer, 0.5-2 parts of antioxidant, 1-6 parts of lubricating release agent and 3-13 parts of active agent to the first plasticized product for first mixing to obtain a first mixed product;

[0053] Second mixing step S4: adding 0-500 parts of shielding component, 5-35 parts of reinforcing filler and 5-20 parts of filler to the first mixing material for second mixing to obtain a second mixing material, performing a thin layer grinding treatment on the second mixing material using an open mixing mill, and then pressing it into a sheet to obtain a mixed rubber sheet of stage A;

[0054] The third mixing step S5: putting the mixed rubber sheet of stage A, 1-4 parts of accelerator and 0.5-20 parts of vulcanizer into an internal mixer for the third mixing, and thin-layer processing and stripping through an open mixer to obtain the mixed rubber strip of stage B;

[0055] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0056] Molding and demoulding step S7: placing the sheet in a glove mold for molding and vulcanization, and after demoulding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0057] The present invention discloses a method for preparing acid- and alkali-resistant protective gloves for glove boxes, which forms a glove material with excellent acid- and alkali-resistant performance through a multi-step mixing and plasticizing process. The gloves of the present invention use a variety of raw material components, including rubber, shielding components, reinforcing fillers, fillers, plasticizers, etc., which effectively enhance the anti-penetration performance, durability and softness of the gloves. Specifically, by introducing plasticizers, antioxidants and activators in the first mixing step, the fluidity and elasticity of the rubber material are improved; by adding shielding components, reinforcing fillers and fillers in the second mixing step, the strengthening and anti-penetration properties of the material are achieved; and by adding accelerators and vulcanizers in the third mixing step, the material is further cross-linked and vulcanized, thereby enhancing the acid- and alkali-resistant and mechanical properties of the gloves.

[0058] The preparation method of the present invention is characterized in that each component is added step by step and plasticized, mixed and vulcanized to ensure that each component is evenly distributed, thereby improving the overall performance of the material. In addition, thin-layer grinding and calendering into sheets are performed on an open mill to make the material high in density and uniform in thickness, ensuring that the protective effect of the finished gloves is stable. The final compression molding and vulcanization process ensures the durability and puncture resistance of the gloves during use.

[0059] Preferably, the particle size of the shielding component is in the range of 20nm-20μm, which can effectively improve the anti-penetration performance and mechanical properties of the gloves. Within this range, the particles of the shielding component are small enough to be evenly distributed in the rubber matrix to form a continuous and dense shielding layer, achieving a good radiation shielding effect; at the same time, the particle size is not too small, avoiding the agglomeration of particles, thereby ensuring the uniformity and structural stability of the material. In addition, the shielding component in this particle size range can better interact with other components in the rubber, enhance the wear resistance and tear resistance of the gloves, and ensure the durability and efficient protection of the gloves in harsh working environments.

[0060] In some preferred embodiments, the temperature of the first plasticizing is 60-100°C and the time is 30s-2min. The temperature of the first mixing is 70-120°C and the time is 1-3min. The temperature of the second mixing is 100-160°C and the time is 2-6min. The temperature of the third mixing is 70-120°C and the time is 30s-4min.

[0061] In some preferred embodiments, in the second mixing step S4, after obtaining the mixed film of stage A, the storage time is ≥ 8 hours.

[0062] In some preferred embodiments, in the molding and demolding step S7, the molding and vulcanization temperature is 150-170° C. and the time is 8-15 min.

[0063] In some preferred embodiments, in the molding and demolding step S7, the dimensions of the glove mold are: length is (700-800) ± 5 mm, and the cuff diameter is (150, 165, 180, 200, 285) ± 2 mm.

[0064] In some preferred embodiments, the thickness of the gloves is 0.4, 0.6, 0.8, 1.0 mm, with an error of -0.1 mm / +0.2 mm; and the diameter of the glove hem is 5±0.5 mm.

[0065] In some preferred embodiments, the rubber is one or more of the following blended composite rubbers: EPDM rubber, butyl rubber, halogenated butyl rubber, chloroprene rubber, and chlorosulfonated polyethylene rubber.

[0066] In some preferred embodiments, the shielding component is of a lead-free type and includes one or more of tungsten, tungsten oxide, tungsten pentaboride, tungsten boride, ferrosoferric oxide, bismuth, and bismuth trioxide.

[0067] In some preferred embodiments, the reinforcing filler is at least one of wear-resistant furnace black and white carbon black. Preferably, the wear-resistant furnace black is one or more of N110, N220, and N330.

[0068] In some preferred embodiments, the filler is one or more of talcum powder, clay, titanium dioxide, barium sulfate, PTFE, high-density polyethylene, and ultra-high molecular polyethylene. These fillers have good dispersibility and help improve the chemical resistance and wear resistance of the gloves. For example, talcum powder and clay can improve the rigidity and durability of the gloves, titanium dioxide and barium sulfate can improve the chemical resistance and shielding effect of the gloves, and PTFE, high-density polyethylene and ultra-high molecular polyethylene provide excellent chemical corrosion resistance, mechanical properties and self-lubricating effect, and enhance the protective ability of the gloves in acidic and alkaline environments.

[0069] In some preferred embodiments, the active agent is one or more of magnesium oxide, zinc oxide, and stearic acid.

[0070] In some preferred embodiments, the antioxidant is one or more of a phenolic antioxidant and an amine antioxidant.

[0071] In some preferred embodiments, the plasticizer is one or more of C5 petroleum resin, C9 petroleum resin, and coumarone resin, which belong to resin plasticizers. The use of resin plasticizers instead of traditional ester or oil plasticizers brings multiple advantages. Resin plasticizers have excellent compatibility and can be evenly integrated with the rubber matrix to enhance the flexibility and durability of the material. Compared with ester or oil plasticizers, the molecular structure of resin plasticizers is more stable, showing higher heat resistance and aging resistance, thereby extending the service life of protective gloves in extreme temperatures and chemical environments. In addition, resin plasticizers have lower volatility, which can significantly reduce the migration or loss of plasticizers during long-term use, maintain the stability of the material, and effectively improve the chemical corrosion resistance of the gloves.

[0072] In some preferred embodiments, the lubricating release agent is one or more of paraffin wax, surfactant, fatty acid, and fatty acid salt.

[0073] In some preferred embodiments, the vulcanizing agent is one or more of sulfur, peroxide, reactive phenolic resin, and active oxide.

[0074] In some preferred embodiments, the rubber is chloroprene or chlorosulfonated polyethylene, or a mixed rubber containing chloroprene or chlorosulfonated polyethylene, and the activator is the same as the vulcanizing agent.

[0075] In some preferred embodiments, the accelerator is one or more of thiurams, thiazoles, sulfenamides, dithiocarbamates, guanidines, thiophosphates, and thioureas, which have excellent performance in accelerating the vulcanization reaction. These accelerators can achieve rapid vulcanization at a lower temperature, shorten production time, reduce energy consumption, and improve production efficiency. In addition, the combination of different types of accelerators can provide excellent synergistic effects, ensure processing safety, increase the crosslinking density during the vulcanization process, and give the material good mechanical strength and elasticity.

[0076] Embodiment 1:

[0077] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0078] 100 parts of butyl rubber, 100 parts of tungsten powder, 25 parts of N110, 10 parts of PTFE, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of paraffin, 1 part of antioxidant D, 5 parts of C9 petroleum resin, 1.2 parts of sulfur, 1 part of thiuram accelerator DPTT, and 1.5 parts of thiazole accelerator MBTS.

[0079] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0080] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0081] First mastication step S2: 100 parts of butyl rubber raw rubber are put into an internal mixer for first mastication at a temperature of 85° C. for 1 minute to obtain a first masticated product;

[0082] First mixing step S3: adding 5 parts of C9 petroleum resin, 1 part of antioxidant D, 5 parts of zinc oxide, 1 part of stearic acid, and 2 parts of paraffin to the first plasticized product for first mixing at a temperature of 120° C. for 2 minutes to obtain a first mixed product;

[0083] The second mixing step S4: add 100 parts of tungsten powder, 25 parts of N110, and 10 parts of PTFE to the first mixing product for second mixing at a temperature of 150° C. for 6 minutes to obtain a second mixing product, perform a thin layer grinding treatment on the second mixing product using an open mixing mill, and then press it into a sheet to obtain a mixed film of stage A, and park it for a parking time of ≥8 hours;

[0084] The third mixing step S5: the mixed rubber sheet of stage A, 1 part of thiuram accelerator DPTT, 1.5 parts of thiazole accelerator MBTS and 1.2 parts of sulfur are put into an internal mixer for the third mixing at a temperature of 90° C. for 2 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0085] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0086] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 160° C. for 9 minutes, and after demolding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0087] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0088]

[0089] Embodiment 2:

[0090] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0091] 100 parts of butyl rubber, 350 parts of bismuth powder, 20 parts of N330, 5 parts of ultra-high molecular polyethylene, 10 parts of zinc oxide, 1 part of stearic acid, 1681 parts of antioxidant, 10 parts of C9 petroleum resin, 5 parts of paraffin, 3 parts of peroxide DCP, 0.8 parts of sulfur, 0.3 parts of thiuram accelerator TMTD, and 1.5 parts of thiazole accelerator MBTS.

[0092] The preparation method of the protective gloves comprises the following steps, measured by weight: raw material preparation step S1: weighing each raw material according to the above raw material components;

[0093] First mastication step S2: 100 parts of butyl rubber raw rubber are put into an internal mixer for first mastication at a temperature of 85° C. for 1 minute to obtain a first masticated product;

[0094] First mixing step S3: adding 10 parts of C9 petroleum resin, 1681 parts of antioxidant, 10 parts of zinc oxide, 1 part of stearic acid, and 5 parts of paraffin to the first plasticized product for first mixing at a temperature of 115° C. for 3 minutes to obtain a first mixed product;

[0095] Second mixing step S4: adding 350 parts of bismuth powder, 20 parts of N330, and 5 parts of ultra-high molecular weight polyethylene to the first mixed product for second mixing at a temperature of 160° C. for 3 minutes to obtain a second mixed product, performing a thin layer grinding treatment on the second mixed product using an open mill, and then pressing it into a sheet to obtain a stage A mixed film, and parking it for a parking time of ≥8 hours;

[0096] The third mixing step S5: the mixed rubber sheet of stage A, 0.3 parts of thiuram accelerator TMTD, 1.5 parts of thiazole accelerator MBTS, 3 parts of peroxide DCP, and 0.8 parts of sulfur are put into an internal mixer for the third mixing at a temperature of 105° C. for 2 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0097] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0098] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 150° C. for 9 minutes, and after demolding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0099] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0100]

[0101] Embodiment 3:

[0102] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0103] 100 parts of butyl rubber, 150 parts of tungsten oxide, 20 parts of white carbon black, 10 parts of barium sulfate, 4 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant A, 15 parts of C5 petroleum resin, interface release agent 935P, 1.5 parts of sulfur, 1 part of thiuram accelerator DPTT, and 1.5 parts of thiazole accelerator MBTS.

[0104] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0105] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0106] First mastication step S2: 100 parts of butyl rubber raw rubber are put into an internal mixer for first mastication at a temperature of 85° C. for 1 minute to obtain a first masticated product;

[0107] First mixing step S3: adding 15 parts of C5 petroleum resin, 1 part of antioxidant A, 4 parts of zinc oxide, 1 part of stearic acid, and interface release agent 935P to the first plasticized product for first mixing at a temperature of 120° C. for 2 minutes to obtain a first mixed product;

[0108] Second mixing step S4: adding 150 parts of tungsten oxide, 20 parts of white carbon black and 10 parts of barium sulfate to the first mixed material for 2 minutes for second mixing at a temperature of 150° C. for 6 minutes to obtain a second mixed material, performing a thin layer grinding treatment on the second mixed material using an open mill, and then pressing it into a sheet to obtain a mixed film of stage A, and parking it for a parking time of ≥8 hours;

[0109] The third mixing step S5: the mixed rubber sheet of stage A, 1 part of thiuram accelerator DPTT, 1.5 parts of thiazole accelerator MBTS, and 1.5 parts of sulfur are put into an internal mixer for the third mixing at a temperature of 100° C. for 5 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0110] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0111] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 160° C. for 12 minutes, and after demolding, the above-mentioned acid and alkali resistant protective gloves are obtained.

[0112] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0113]

[0114] Embodiment 4:

[0115] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0116] 100 parts of EPDM rubber, 300 parts of tungsten boride, 35 parts of N550, 10 parts of high-density polyethylene, 5 parts of zinc oxide, 2 parts of stearic acid, 1681 parts of antioxidant, 10 parts of coumarone resin, 1.5 parts of sulfur, 1 part of zinc stearate, 1.5 parts of sulfonamide accelerator CZ, and 1 part of thiazole accelerator MBTS.

[0117] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0118] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0119] First plasticizing step S2: 100 parts of EPDM raw rubber are put into an internal mixer for first plasticizing at a temperature of 90° C. for 30 seconds to obtain a first plasticized product;

[0120] First mixing step S3: adding 10 parts of coumarone resin, 1681 parts of antioxidant, 5 parts of zinc oxide, 2 parts of stearic acid, and 1 part of zinc stearate to the first plasticized product for first mixing at a temperature of 100° C. for 2 minutes to obtain a first mixed product;

[0121] Second mixing step S4: adding 300 parts of tungsten boride, 35 parts of N550, and 10 parts of high-density polyethylene to the first mixed material for second mixing at a temperature of 140° C. for 4 minutes to obtain a second mixed material, performing a thin layer grinding treatment on the second mixed material using an open mill, and then pressing it into a sheet to obtain a stage A mixed film, and parking it for a parking time of ≥8 hours;

[0122] The third mixing step S5: the mixed rubber sheet of stage A, 1.5 parts of sulfonamide accelerator CZ, 1 part of thiazole accelerator MBTS, and 1.5 parts of sulfur are put into an internal mixer for the third mixing at a temperature of 105° C. for 3 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0123] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0124] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 100° C. for 15 minutes, and after demolding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0125] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0126]

[0127] Embodiment 5:

[0128] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0129] 100 parts of EPDM rubber, 400 parts of ferrosoferric oxide, 25 parts of N110, 10 parts of PTFE, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant D, 10 parts of C5 petroleum resin, 2 parts of paraffin, 1.2 parts of sulfur, 0.5 parts of thiuram accelerator TETD, and 1.5 parts of thiazole accelerator MBTS.

[0130] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0131] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0132] First plasticizing step S2: 100 parts of EPDM raw rubber are put into an internal mixer for first plasticizing at a temperature of 90° C. for 1 minute to obtain a first plasticized product;

[0133] First mixing step S3: adding 10 parts of C5 petroleum resin, 1 part of antioxidant D, 5 parts of zinc oxide, 1 part of stearic acid, and 2 parts of paraffin to the first plasticized product for first mixing at a temperature of 110° C. for 2 minutes to obtain a first mixed product;

[0134] Second mixing step S4: adding 400 parts of ferroferric oxide, 25 parts of N110, and 10 parts of PTFE to the first mixed product for second mixing at a temperature of 140° C. for 6 minutes to obtain a second mixed product, performing a thin layer grinding treatment on the second mixed product using an open mixing mill, and then pressing it into a sheet to obtain a mixed film of stage A, and parking it for a parking time of ≥8 hours;

[0135] The third mixing step S5: the mixed rubber sheet of stage A, 0.5 parts of thiuram accelerator TETD, 1.5 parts of thiazole accelerator MBTS, and 1.2 parts of sulfur are put into an internal mixer for the third mixing at a temperature of 90° C. for 3 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0136] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0137] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 160° C. for 9 minutes, and after demolding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0138] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0139]

[0140] Embodiment 6:

[0141] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0142] 100 parts of brominated butyl rubber, 250 parts of tungsten powder, 25 parts of N330, 10 parts of PTFE, 5 parts of zinc oxide, 0.25 parts of magnesium oxide, 1 part of stearic acid, 22461 parts of antioxidant, 5 parts of coumarone resin, 3 parts of interface release agent 935P, 0.5 parts of thiuram accelerator TMTD, and 1 part of thiazole accelerator MBTS.

[0143] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0144] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0145] First mastication step S2: 100 parts of bromobutyl rubber raw rubber are put into an internal mixer for first mastication at a temperature of 70° C. for 2 minutes to obtain a first masticated product;

[0146] First mixing step S3: adding 5 parts of coumarone resin, 22461 parts of antioxidant, 0.25 parts of magnesium oxide, 1 part of stearic acid, and 3 parts of interface release agent 935P to the first plasticized product for first mixing at a temperature of 90° C. for 2 minutes to obtain a first mixed product;

[0147] The second mixing step S4: adding 250 parts of tungsten powder, 25 parts of N330, and 10 parts of PTFE to the first mixing product for second mixing at a temperature of 130° C. for 5 minutes to obtain a second mixing product, performing a thin layer grinding treatment on the second mixing product using an open mixing mill, and then pressing it into a sheet to obtain a mixed film of stage A, and parking it for a parking time of ≥8 hours;

[0148] The third mixing step S5: the mixed rubber sheet of stage A, 5 parts of zinc oxide, 0.5 parts of thiuram accelerator TMTD, and 1 part of thiazole accelerator MBTS are put into an internal mixer for the third mixing at a temperature of 80° C. for 4 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0149] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0150] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 150° C. for 12 minutes, and after demolding, the above-mentioned acid and alkali resistant protective gloves are obtained.

[0151] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0152]

[0153] Embodiment 7:

[0154] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0155] 870 parts of butyl rubber, 20 parts of chlorosulfonated polyethylene, 300 parts of bismuth powder, 25 parts of N220, 10 parts of titanium dioxide, 1 part of magnesium oxide, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of paraffin, 1 part of antioxidant A, 5 parts of C5 petroleum resin, 1 part of sulfur, 1 part of thiuram accelerator TMTD, and 1.5 parts of thiazole accelerator MBTS.

[0156] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0157] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0158] First plasticizing step S2: 870 parts of butyl rubber and 20 parts of chlorosulfonated polyethylene are put into an internal mixer for first plasticizing at a temperature of 90° C. for 1 minute to obtain a first plasticized product;

[0159] First mixing step S3: adding C5 petroleum resin, 1 part of antioxidant A, 1 part of magnesium oxide, 5 parts of zinc oxide, 2 parts of stearic acid, and 2 parts of paraffin to the first plasticized product for first mixing at a temperature of 110° C. for 2 minutes to obtain a first mixed product;

[0160] Second mixing step S4: adding 300 parts of bismuth powder, 25 parts of N220, and 10 parts of titanium dioxide to the first mixed product for second mixing at a temperature of 140° C. for 6 minutes to obtain a second mixed product, performing a thin layer grinding treatment on the second mixed product using an open mill, and then pressing it into a sheet to obtain a stage A mixed film, and parking it for a parking time of ≥8 hours;

[0161] The third mixing step S5: the mixed rubber sheet of stage A, 1 part of sulfur, 1 part of thiuram accelerator TMTD, and 1.5 parts of thiazole accelerator MBTS are put into an internal mixer for the third mixing at a temperature of 90° C. for 4 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0162] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0163] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 160° C. for 10 min, and after demolding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0164] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0165]

[0166] Embodiment 8:

[0167] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0168] 70 parts of EPDM rubber, 30 parts of chloroprene rubber, 60 parts of tungsten powder, 20 parts of white carbon black, 10 parts of barium sulfate, 1.2 parts of magnesium oxide, 5 parts of zinc oxide, 1 part of stearic acid, 22460.5 parts of antioxidant, 10 parts of coumarone, 2 parts of zinc stearate, 1.2 parts of sulfur, 0.5 parts of thiuram accelerator TMTD, and 1 part of thiazole accelerator MBTS.

[0169] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0170] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0171] First plasticizing step S2: 70 parts of EPDM rubber and 30 parts of chloroprene rubber are put into an internal mixer for first plasticizing at a temperature of 80° C. for 2 minutes to obtain a first plasticized product;

[0172] First mixing step S3: adding 10 parts of coumarone, 22460.5 parts of antioxidant, 1.2 parts of magnesium oxide, 5 parts of zinc oxide, 1 part of stearic acid, and 2 parts of zinc stearate to the first plasticized product for first mixing at a temperature of 90° C. for 3 minutes to obtain a first mixed product;

[0173] Second mixing step S4: adding 60 parts of tungsten powder, 20 parts of white carbon black and 10 parts of barium sulfate to the first mixed product for second mixing at a temperature of 120° C. for 5 minutes to obtain a second mixed product, performing a thin layer grinding treatment on the second mixed product using an open mill, and then pressing it into a sheet to obtain a mixed film of stage A, and parking it for a parking time of ≥8 hours;

[0174] The third mixing step S5: the mixed rubber sheet of stage A, 1.2 parts of sulfur, 0.5 parts of thiuram accelerator TMTD, and 1 part of thiazole accelerator MBTS are put into an internal mixer for the third mixing at a temperature of 80° C. for 3 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0175] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0176] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 155° C. for 15 minutes, and after demolding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0177] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0178]

[0179] Embodiment 9:

[0180] This embodiment provides an acid and alkali penetration resistant protective glove for a glove box. The raw materials include the following components by weight:

[0181] 60 parts of brominated butyl rubber, 40 parts of chloroprene rubber, 450 parts of tungsten oxide, 35 parts of N330, 10 parts of PTFE, 4 parts of magnesium oxide, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant D, 10 parts of C9 petroleum resin, 3 parts of paraffin, and 0.5 parts of thiourea accelerator NA-22.

[0182] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0183] Raw material preparation step S1: weigh each raw material according to the above raw material components;

[0184] First plasticizing step S2: putting 60 parts of bromobutyl rubber and 40 parts of chloroprene rubber into an internal mixer for first plasticizing at a temperature of 80° C. for 1 minute to obtain a first plasticized product;

[0185] First mixing step S3: adding 10 parts of C9 petroleum resin, 1 part of antioxidant D, 4 parts of magnesium oxide, 1 part of stearic acid, and 3 parts of paraffin to the first plasticized product for first mixing at a temperature of 110° C. for 2 minutes to obtain a first mixed product;

[0186] Second mixing step S4: adding 450 parts of tungsten oxide, 35 parts of N330 and 10 parts of PTFE to the first mixing product for second mixing at a temperature of 130° C. for 6 minutes to obtain a second mixing product, performing a thin layer grinding treatment on the second mixing product using an open mixing mill, and then pressing it into a sheet to obtain a mixed film of stage A, and parking it for a parking time of ≥8 hours;

[0187] The third mixing step S5: the mixed rubber sheet of stage A, 5 parts of zinc oxide and 0.5 parts of thiourea accelerator NA-22 are put into an internal mixer for the third mixing at a temperature of 85° C. for 4 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0188] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0189] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 150° C. for 12 minutes, and after demolding, the above-mentioned acid and alkali resistant protective gloves are obtained.

[0190] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0191]

[0192] Comparative Example 1:

[0193] This comparative example provides a protective glove, and the raw materials include the following components by weight:

[0194] 100 parts of butyl rubber, 100 parts of tungsten powder, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant D, 10 parts of naphthenic oil, 1.2 parts of sulfur, 1 part of thiuram accelerator DPTT, and 1.5 parts of thiazole accelerator MBTS.

[0195] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0196] First mastication step S2: 100 parts of butyl rubber raw rubber are put into an internal mixer for first mastication at a temperature of 85° C. for 1 minute to obtain a first masticated product;

[0197] First mixing step S3: adding 10 parts of naphthenic oil, 1 part of antioxidant D, 5 parts of zinc oxide, and 1 part of stearic acid to the first plasticized product for first mixing at a temperature of 120° C. for 2 minutes to obtain a first mixed product;

[0198] Second mixing step S4: adding 100 parts of tungsten powder to the first mixing product for second mixing at a temperature of 150° C. for 3 minutes to obtain a second mixing product, performing a thin layer grinding treatment on the second mixing product using an open mixing mill, and then pressing it into a sheet to obtain a mixed film of stage A, and parking it for a parking time of ≥8 hours;

[0199] The third mixing step S5: the mixed rubber sheet of stage A, 1.2 parts of sulfur, 1 part of thiuram accelerator DPTT, and 1.5 parts of thiazole accelerator MBTS are put into an internal mixer for the third mixing at a temperature of 85° C. for 4 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0200] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0201] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 160° C. for 15 minutes, and after demolding, the above-mentioned acid and alkali resistant protective gloves are obtained.

[0202] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0203]

[0204] Comparative Example 2:

[0205] This comparative example provides a protective glove, and the raw materials include the following components by weight:

[0206] 100 parts of natural rubber, 100 parts of tungsten powder, 30 parts of N110, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant D, 1.2 parts of sulfur, and 5 parts of thiuram accelerator DPTT.

[0207] The preparation method of the protective gloves comprises the following steps, measured by weight:

[0208] First mastication step S2: 100 parts of natural rubber raw rubber are put into an internal mixer for first mastication at a temperature of 70°C for 1 minute to obtain a first masticated product;

[0209] First mixing step S3: adding 1 part of antioxidant D, 5 parts of zinc oxide and 1 part of stearic acid to the first plasticized product for first mixing at a temperature of 100° C. for 2 minutes to obtain a first mixed product;

[0210] The second mixing step S4: adding 100 parts of tungsten powder and 30 parts of N110 to the first mixing material for the second mixing, the temperature is 130°C, the time is 4 minutes, and the second mixing material is obtained. The second mixing material is subjected to a thin layer grinding treatment by an open mixing mill, and then pressed into a sheet to obtain a mixed film of stage A, and parked for a parking time of ≥8 hours;

[0211] The third mixing step S5: the mixed rubber sheet of stage A, 1.2 parts of sulfur, and 5 parts of thiuram accelerator DPTT are put into an internal mixer for the third mixing at a temperature of 85° C. for 3 minutes, and thin layer processing is performed on an open mixer to produce a strip, thereby obtaining a mixed rubber strip of stage B;

[0212] Calendering into sheets step S6: putting the mixed rubber strip of stage B into an extrusion calender, calendering it into a sheet of fixed thickness, and then winding or cutting it after cooling it to room temperature to obtain a sheet;

[0213] Molding and demolding step S7: placing the sheet in a glove mold for compression vulcanization at a temperature of 150° C. for 8 minutes, and after demolding, obtaining the above-mentioned acid and alkali resistant protective gloves.

[0214] The palm of the gloves was selected to test its anti-penetration performance and wear resistance in different chemical reagents. The chemical reagents include: sodium hydroxide (mass fraction 40%), sulfuric acid (mass fraction 96%), nitric acid (mass fraction 65%), acetic acid (mass fraction 99%), hydrofluoric acid (mass fraction 40%), etc. In addition, the lead equivalent ( 60 Co source) and its uniformity were measured. The test results of this embodiment are as follows:

[0215]

[0216] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for preparing acid and alkali penetration resistant protective gloves for glove boxes, characterized in that: The steps include: S1: Weigh the raw materials as follows: 100 parts of rubber, 0-500 parts of shielding component, 5-35 parts of reinforcing filler, 5-20 parts of filler, 3-13 parts of activator, 0.5-2 parts of antioxidant, 5-20 parts of plasticizer, 1-6 parts of lubricating release agent, 0.5-20 parts of vulcanizing agent, and 1-4 parts of accelerator; S2: performing a first mastication on the rubber to obtain a first masticated product; S3: adding the plasticizer, the antioxidant, the lubricating release agent and the activator to the first plasticized product for first mixing to obtain a first mixed product; S4: adding the shielding component, the reinforcing filler and the filler to the first mixed product for a second mixing to obtain a second mixed product, and performing a thin layer grinding treatment on the second mixed product and pressing it into a sheet to obtain a stage A mixed film; S5: performing a third mixing process on the mixed rubber sheet of stage A, the accelerator and the vulcanizing agent, and performing thin layer processing and stripping to obtain the mixed rubber strip of stage B; S6: rolling the mixed rubber strip of stage B into a sheet, and rolling or cutting it after cooling to room temperature to obtain a sheet; S7: placing the sheet material in a glove mold for compression vulcanization, and demolding to obtain the acid and alkali resistant protective gloves; The particle size of the shielding component ranges from 20 nm to 20 μm to ensure uniform dispersion in the rubber and improve the anti-penetration performance.

2. The preparation method according to claim 1, characterized in that: In the steps S2-S5, the temperature of the first plasticizing is 60-100°C, and the time is 30s-2min; the temperature of the first mixing is 70-120°C, and the time is 1-3min; the temperature of the second mixing is 100-160°C, and the time is 2-6min; the temperature of the third mixing is 70-120°C, and the time is 30s-4min.

3. The preparation method according to claim 1, characterized in that: In the step S4, after the mixed film of stage A is obtained, it is left to stand for ≥8 hours.

4. The preparation method according to claim 1, characterized in that: In step S7, the temperature of the compression vulcanization is 150-170° C. and the time is 8-15 minutes.

5. The preparation method according to claim 1, characterized in that: The rubber is one or more of EPDM rubber, butyl rubber, halogenated butyl rubber, chloroprene rubber, and chlorosulfonated polyethylene rubber.

6. The preparation method according to claim 5, characterized in that: When the rubber is chloroprene rubber, chlorosulfonated polyethylene rubber, or a blended composite rubber containing chloroprene rubber and chlorosulfonated polyethylene rubber, the activating agent is the same as the vulcanizing agent.

7. The preparation method according to claim 1, characterized in that: The shielding component is lead-free and includes one or more of tungsten, tungsten oxide, tungsten pentaboride, tungsten boride, ferroferric oxide, bismuth, and bismuth trioxide.

8. The preparation method according to claim 1, characterized in that: The reinforcing filler is at least one of wear-resistant furnace black and white carbon black.

9. The preparation method according to claim 7, characterized in that: The wear-resistant furnace black is one or more of N110, N220 and N330.

10. The preparation method according to claim 1, characterized in that: The filler is one or more of talcum powder, clay, titanium dioxide, barium sulfate, PTFE, high-density polyethylene, and ultra-high molecular polyethylene.

11. The preparation method according to claim 1, characterized in that: The plasticizer is a resin plasticizer.

12. The preparation method according to claim 11, characterized in that: The plasticizer is one or more of C5 petroleum resin, C9 petroleum resin and coumarone resin.

13. The preparation method according to claim 1, characterized in that: The lubricating release agent is one or more of paraffin, surfactant, fatty acid and fatty acid salt.

14. The preparation method according to claim 1, characterized in that: The vulcanizing agent is one or more of sulfur, peroxide, reactive phenolic resin and active oxide.

15. The preparation method according to claim 1, characterized in that: The accelerator is one or more of thiurams, thiazoles, sulfenamides, dithiocarbamates, guanidines, thiophosphates, and thioureas.

16. A protective glove for glove box that resists acid and alkali penetration, characterized in that: Prepared by the preparation method according to any one of claims 1 to 15.

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