Manufacturing method for anti-static and chemical protective rubber gloves

Abstract

To provide a manufacturing method of rubber gloves having a good balance of other functions (e.g. electric conductivity, flexibility, strength, etc.) in addition to chemical deterioration resistance and chemical permeation resistance and to provide a composition for manufacturing rubber products and the rubber gloves.SOLUTION: A manufacturing method of rubber gloves includes the steps of: mixing rubber materials and carbon nanotubes to produce a rubber compound; dissolving the rubber compound with an organic solvent to produce a rubber solution; immersing a glove mold in the rubber solution to form a rubber composition; and vulcanizing the rubber composition.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention provides Anti-static and chemical protection This relates to a method for manufacturing rubber gloves. [Background technology]

[0002] Traditionally, rubber protective gloves for industrial use (rubber gloves) have been equipped with specific functions according to the intended use, such as those that prevent chemicals from seeping in (those resistant to chemical deterioration), those that prevent chemicals from passing through (passing through at the molecular level (as gas)) (those with an anti-permeation effect (chemical permeation resistance)), or those with an anti-static effect (electrical conductivity).

[0003] For example, known examples of chemical-permeation-resistant rubber gloves include chemical protective gloves that can inhibit the permeation of harmful chemicals through a membrane with a film thickness of 0.3 to 1.0 mm for at least one hour (see, for example, Patent Document 1). Also, known protective gloves have a polymer foam layer containing carbon fiber (see, for example, Patent Document 2). Furthermore, protective gloves that combine solvent degradation resistance and electrical conductivity by using a thermoplastic polyurethane solution with dispersed carbon black (see, for example, Patent Document 3) and gloves that combine solvent degradation resistance and chemical permeation resistance are also available. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 1864770 [Patent Document 2] Special Publication No. 2022-536038 [Patent Document 3] Special Publication No. 53-35104 Summary of the Invention [Problem to be solved by the invention]

[0005] However, there is a demand for further functions to be added to conventional rubber gloves with chemical permeation resistance. Specifically, for example, chemical permeation resistance and antistatic effect (for example, electrical resistance of 1×10 based on the European standard EN16350) are required. 8 It is desired to develop a product that has both a resistance to chemical permeation (less than Ω) and suitable flexibility and strength as a glove. Specifically, it is possible to impart electrical conductivity to conventional rubber gloves that have chemical permeation resistance by adding, for example, carbon black, but when the amount of carbon black is increased to the extent that an antistatic effect is obtained, flexibility decreases, and so on, and there are both advantages and disadvantages.

[0006] In view of the above circumstances, the present invention provides a polymer that has a good balance of chemical deterioration resistance and chemical permeation resistance as well as other functions (for example, electrical conductivity, flexibility, strength, etc.). Anti-static and chemical protection The present invention provides a method for manufacturing rubber gloves. [Means for solving the problem]

[0007] The present invention provides The first amount For solid rubber materials The second amount Solid carbon nanotubes and a third amount of carbon black. and kneading the mixture in a kneader to produce a rubber compound; dissolving the rubber compound in an organic solvent to produce a rubber solution; immersing a glove mold in the rubber solution to form a rubber composition; and vulcanizing the rubber composition to produce a rubber composition having an electrical resistance of 1×10 8 and a step of reducing the resistance to less than Ω. death, In the step of producing the rubber compound, The third amount is 20 phr or more and less than 30 phr, and the second amount is more than 0.05 phr and less than 0.3 phr, or the third amount is 30 phr, and the second amount is more than 0.025 phr and less than 0.3 phr. Characterized by Anti-static and chemical protection This relates to a method for manufacturing rubber gloves. [Effects of the Invention]

[0010] According to the present invention, in addition to chemical deterioration resistance and chemical permeation resistance, other functions (e.g., electrical conductivity, flexibility, strength, etc.) are well balanced. Anti-static and chemical protection rubber gloves It is possible to provide a manufacturing method of This can have an excellent effect. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a flow diagram illustrating an embodiment of the present invention. [Figure 2] 1 is a table showing the evaluation results of Example 1. [Figure 3] 1 is a table summarizing the evaluation results of Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is a flow diagram showing an example of a method for manufacturing a rubber glove in this embodiment. The method for manufacturing a rubber glove includes the steps of: mixing a rubber material and carbon nanotubes (CNTs) to produce a rubber compound (step S01); dissolving the rubber compound in an organic solvent to produce a rubber solution (step S03); degassing the rubber solution (step S05); applying the rubber solution to a glove mold to form a rubber composition of a desired shape (step S07); and vulcanizing the rubber composition (step S09).

[0013] In the following, in the present embodiment, the rubber gloves will be described as industrial or industrial rubber gloves. In particular, the rubber gloves of the present embodiment are protective rubber gloves (protective gloves, chemical protective gloves) that have a good balance of chemical deterioration resistance, chemical permeation resistance, electrical conductivity, flexibility, strength, etc.

[0014] In step S01, rubber material and carbon nanotubes are mixed to produce a rubber compound. The rubber material in this embodiment is either "natural rubber (raw rubber)" made from the sap of rubber trees or "synthetic rubber" made from petroleum and naphtha. Furthermore, the rubber material is capable of exhibiting resistance to chemical degradation and chemical permeation when made into a finished product (rubber gloves). Here, "chemicals" that are resistant to chemical degradation and chemical permeation specifically include organic solvents, organic bases, inorganic bases, organic acids, and inorganic acids. Specific examples of rubber materials include natural rubber, nitrile rubber, chloroprene rubber, polyisoprene rubber, polyurethane, butyl rubber, fluororubber, chlorosulfonated polyethylene (CSM), silicone rubber, and epichlorohydrin rubber. The rubber material is appropriately selected to prevent degradation and permeation by the target chemicals.

[0015] Carbon nanotubes are solid, specifically powder, but they can also be in the form of a carbon nanotube mixture (e.g., a masterbatch) in which carbon nanotubes are kneaded into materials such as resin or rubber. Furthermore, carbon nanotubes can be single-walled carbon nanotubes, which consist of only one tube, or multi-walled carbon nanotubes, which have a nested structure of multiple tubes. For example, multi-walled carbon nanotubes are generally less expensive. On the other hand, single-walled carbon nanotubes have the advantage of being able to demonstrate their performance even in small amounts. Considering the dispersibility of carbon nanotubes, single-walled carbon nanotubes are particularly desirable when molding rubber products from liquids (solutions in which carbon nanotubes or the like are added to rubber materials and then dissolved and stirred).

[0016] In this embodiment, carbon black is further mixed into the rubber material. The carbon black may be in the form of powder or a carbon black mixture (e.g., masterbatch) in which carbon black is kneaded into materials such as resin or rubber. Furthermore, it is desirable that the carbon black have a DBP (dibutyl phthalate) absorption of 140 ml / 100 g or less and an iodine adsorption of 100 mg / g or less, for example.

[0017] In this embodiment, the above-mentioned carbon nanotubes and carbon black, as well as various compounding agents, are added to a rubber material and kneaded in a rubber mixer (e.g., a Banbury mixer, an internal mixer, a kneader, an open roll, etc.) to produce a rubber compound.

[0018] The amount of carbon nanotubes added is, for example, 0.5 phr or less, desirably 0.01 phr to 0.5 phr, preferably 0.025 phr to less than 0.5 phr, more preferably 0.025 phr to 0.3 phr, even more preferably 0.025 phr to less than 0.3 phr, and particularly preferably more than 0.025 phr to less than 0.3 phr. Here, "phr" refers to the parts by weight of the substance (here, carbon nanotubes) per 100 parts by weight of raw rubber in the rubber compound. The amount of carbon black added is less than 40 phr, desirably 5 phr to 35 phr, preferably 10 phr to 35 phr, more preferably more than 10 phr to 30 phr, and even more preferably 20 phr to 30 phr.

[0019] The various compounding agents include reinforcing agents, antioxidants, vulcanizing agents, vulcanization accelerators, and the like, which are known in the manufacture of rubber.

[0020] In step S03, the rubber compound is dissolved in an organic solvent, stirred, and uniformly dispersed, and the viscosity is adjusted to the desired level to produce a rubber solution. Examples of organic solvents include toluene, xylene, acetone, methyl ethyl ketone, cyclohexane, dimethylformamide, N-methyl-2-pyrrolidone, ethyl acetate, methyl acetate, and alcohol-based solvents. The viscosity of the rubber solution is, for example, approximately 0.5 Pa·s to 25 Pa·s, desirably approximately 1 Pa·s to 20 Pa·s, preferably approximately 3 Pa·s to 15 Pa·s, and more preferably approximately 5 Pa·s to 10 Pa·s. Furthermore, if necessary, additives (e.g., an antifoaming agent) are added to the rubber solution, which is then stirred to uniformly disperse the mixture.

[0021] Next, in step S05, the rubber solution is degassed as needed. Air bubbles may be present in the rubber solution during the dissolving and stirring processes. These air bubbles can cause pinholes in rubber gloves, which is a fatal defect, especially in chemical protective gloves. Therefore, when manufacturing chemical protective gloves, the rubber solution is left to stand for a predetermined period of time (e.g., 24 hours) in this step to remove any air bubbles present in the rubber solution.

[0022] In step S07, the rubber solution is applied to a molding die to form a rubber composition of the desired shape. The molding die is, for example, a glove mold. That is, the glove mold is immersed in the degassed rubber solution and then pulled out of the rubber solution, thereby applying the rubber solution to the surface of the glove mold. The glove mold with the rubber solution applied thereto is then placed in a dryer and dried. If necessary, the process from immersing the glove mold in the rubber solution to drying is repeated multiple times to form a rubber composition. The thickness of the rubber composition is adjusted by the number of times the process from immersing the glove mold in the rubber solution to drying is repeated. The thickness of the rubber composition increases with the number of repetitions. The thickness is, for example, about 0.1 mm to 2 mm, desirably about 0.2 mm to 1.0 mm, preferably about 0.3 mm to 0.7 mm, and more preferably about 0.3 mm to 0.5 mm.

[0023] In step S09, the rubber composition molded into a glove shape is placed in a vulcanization oven, heated to crosslink, and the desired rubber properties are developed. After that, the rubber composition is removed from the vulcanization oven and peeled (released) from the glove mold. This completes the formation of a rubber glove.

[0024] In conventional protective gloves (especially chemical protective gloves), there has been a demand for multiple properties (e.g., electrical conductivity, flexibility, strength, etc.) in addition to chemical deterioration resistance and chemical permeation resistance. The rubber gloves manufactured by the manufacturing method of this embodiment contain 0.5 phr or less of carbon nanotubes and less than 40 phr of carbon black per 100 parts by weight of rubber material, and thus can have predetermined electrical conductivity, flexibility, and strength in addition to chemical deterioration resistance and chemical permeation resistance.

[0025] In step S07, after the fiber gloves are placed on the glove mold, they may be immersed in a rubber dissolving solution to form a rubber composition on the upper layer (outer layer) of the fiber gloves. This allows the formation of rubber gloves with a fiber glove on the lower layer (inner layer). In this case, the fiber gloves may be made of, for example, cotton, nylon, polyester, aramid fiber, high-density polyethylene, etc. Alternatively, conductive fiber gloves may be used instead of these fiber gloves, or conductive fiber gloves may be added (superimposed) on top of these fiber gloves. The fiber gloves may be sewn gloves or knitted gloves.

[0026] This embodiment also relates to a composition for producing rubber products that combines chemical degradation resistance, chemical permeation resistance, electrical conductivity, flexibility, strength, and other properties in a well-balanced manner. The composition for producing rubber products contains a first amount of a rubber material, a second amount of carbon nanotubes, and a third amount of carbon black greater than the second amount, where the second amount is 0.5 phr or less and the third amount is less than 40 phr. The composition for producing rubber products of this embodiment can be used to produce, for example, protective gloves (chemical protective gloves), shoes (boots), shoe soles, and protective clothing (aprons, etc.) by molding it into a desired shape.

[0027] As described above, the applicant of the present application has found a manufacturing method of rubber gloves which can provide protective gloves, particularly chemical protective gloves, with chemical deterioration resistance, chemical permeation resistance, predetermined electrical conductivity, and predetermined properties (flexibility and strength) by kneading carbon nanotubes and carbon black into a rubber material, dissolving the mixture, and molding the mixture.

[0028] The present inventors have also discovered a composition for producing rubber products, which contains 0.5 phr or less of carbon nanotubes and less than 40 phr of carbon black in a rubber material.

[0029] The results of examining the mixing ratio of carbon nanotubes and carbon black are shown below. [Example]

[0030] Butyl rubber was used as the rubber material, and the properties of 15 types of samples (rubber compositions) containing varying amounts of carbon nanotubes and carbon black were compared.

[0031] For all samples, the manufacturing method of the rubber composition was the same as that of the above-described embodiment, except that the amounts of carbon nanotubes and carbon black added were varied. Specifically, butyl rubber was used as the rubber material, and carbon nanotubes, carbon black, and various compounding agents (zinc oxide, stearic acid, sulfur, and vulcanization accelerator) were added to the rubber material and kneaded to obtain a rubber compound. The rubber compound was dissolved in the organic solvent described above and adjusted to the desired viscosity to produce a rubber solution. After removing air bubbles from the rubber solution, a glove mold was immersed in the solution, dried, and vulcanized to obtain a rubber composition.

[0032] Samples No. 1 to No. 5 were prepared by adding 10 phr of carbon black (CB) and different amounts of carbon nanotubes (CNT) to butyl rubber, with the respective amounts of carbon nanotubes added for No. 1 to No. 5 being 0.025, 0.05, 0.1, 0.3, and 0.5 (all in phr, the same applies below).

[0033] Samples No. 6 to No. 10 were prepared by adding 20 phr of carbon black and different amounts of carbon nanotubes to butyl rubber, with the respective amounts of carbon nanotubes added being 0.025, 0.05, 0.1, 0.3, and 0.5, respectively.

[0034] Samples No. 11 to No. 15 were prepared by adding 30 phr of carbon black and different amounts of carbon nanotubes to butyl rubber, with the respective amounts of carbon nanotubes added being 0.025, 0.05, 0.1, 0.3, and 0.5, respectively.

[0035] Tensile tests and tear tests were conducted on 15 types of samples to evaluate strength and flexibility, and swelling tests and permeation tests were conducted to evaluate the chemical resistance required for chemical protective gloves. Electrical resistance was also measured to evaluate electrical conductivity. Flexibility as a chemical protective glove is evaluated, for example, when the 100% tensile stress (the stress applied when the test piece is stretched 100% (stretched to twice its original length) in a tensile test conforming to JIS K 6251:2023) is 6 kgf / cm. 2 Regarding strength, for example, the tensile strength required to break the test piece in the same tensile test is 100 kgf / cm 2 The electrical resistance is preferably 1 x 10 or more, which is the value based on the European standard EN16350. 8 Less than Ω (e.g., 1×10 3 Ω~1×10 7 Furthermore, the suitability of the rubber gloves as chemical protective gloves was evaluated comprehensively from the viewpoint of dispersibility.

[0036] The specific details of the tensile test, tear test, swelling test, and permeation test are shown below. Note that the values ​​in brackets [ ] are the evaluation criteria for suitability as rubber gloves (chemical protective gloves).

[0037] The tensile test involves measuring the maximum stress (the maximum stress at which the test piece breaks when pulled at a constant speed) [100 kgf / cm 2or more], 100% tensile stress [6kgf / cm 2 The tear test involves measuring the maximum tear strength (the force required to tear the rubber material) [20 kgf / cm 2 The maximum point stress and maximum tearing force are mainly used as evaluation indexes for strength, while the 100% tensile stress and elongation at break are mainly used as evaluation indexes for flexibility (stretchability).

[0038] The swelling test involves measuring the swelling ratio for butyl acetate (a value indicating how many times the surface area of ​​a test piece increases in comparison to its original size when immersed in butyl acetate for 30 minutes) [less than 1.5], and the permeation test involves measuring the breakthrough time for ethyl acetate (the time from when the chemical comes into contact with the test piece until it breaks through) [60 minutes or more]. The swelling test and permeation test are used as evaluation indicators for chemical resistance. Electrical conductivity is measured when the electrical resistance value is 1 x 10 8 When the resistance was less than Ω, it was judged that "antistatic effect was present," and the dispersibility was judged by appearance (visual inspection).

[0039] These results are shown in Figure 2. All of Samples No. 1 to No. 15 were within the evaluation standards for the swelling test, permeation test, and dispersion, fulfilling the values ​​required for chemical protective gloves. However, there were advantages and disadvantages for maximum point stress, 100% tensile stress, elongation at break, maximum tear strength, and electrical resistance. Therefore, we evaluated the balance between multiple properties comprehensively using our own evaluation criteria, and the results are shown in Figure 2.

[0040] Specifically, for each of Samples No. 1 to No. 15, each evaluation item, i.e., maximum point stress, 100% tensile stress, elongation at break, maximum tear strength, and electrical resistance, was first evaluated relative to the required standard (required value) and categorized into four levels (◎, ◯, △, ×) (excluding dispersibility). "◎" indicates that the required standard is fully met (very suitable), "◯" indicates that the required standard is met (suitable), "△" indicates that the required standard is met but the difference from the standard is small, and "×" indicates that the required standard is not met. Furthermore, the "degree" of the standard, such as "fully" meeting the standard or "small" difference from the standard, was determined for each evaluation item based on knowledge gained in rubber glove manufacturing.

[0041] Furthermore, to perform a comprehensive evaluation for each of Samples No. 1 to No. 15, the relative evaluation was assigned a score of 3 for "◎", 2 for "〇", 1 for "△", and 0 for "×", and the total score (point) of the relative evaluation was calculated for each of Samples No. 1 to No. 15, with 13 or more being evaluated as "A", 10 to 12 as "B", and less than 10 as "C". Furthermore, even if the total relative evaluation was "B", samples that had an evaluation item that was "×" in the relative evaluation were evaluated as "C".

[0042] In other words, "A" is the highest overall rating, and is the most suitable chemical protective glove for the purpose of this study, which combines resistance to chemical deterioration and chemical permeation with the required electrical conductivity and also has a good balance of the required properties (flexibility and strength). "B" and "C" are ranked in order, and the overall ratings are relatively lower compared to "A".

[0043] In addition, the specified electrical resistance value (1×10 8 To obtain a hardness of less than Ω, an amount of carbon black of 40 phr or more was required, but in that case, flexibility was insufficient and dispersibility was poor, which in turn led to a decrease in strength, and the desired results were not obtained. Therefore, an investigation was conducted into the case where the amount of carbon black added was less than 40 phr.

[0044] Furthermore, the electrical resistance value decreases as the amount of carbon nanotubes added increases, but costs increase significantly. Therefore, we investigated the amount of carbon nanotubes added, which is sufficient, at 0.5 phr or less.

[0045] In addition to the samples shown in Figure 2, powdered carbon black (20 phr) was mixed with the rubber material and dissolved in an organic solvent (first rubber solution), to which powdered carbon nanotubes (0.1 phr) were added and stirred to produce a rubber solution (second rubber solution). Rubber gloves molded from this second rubber solution were also examined. In this case, the target electrical resistance value (10 3 Ω~10 7 Although the Ω value was achieved, the dispersion of the carbon nanotubes in the first rubber solution was poor, making it impossible to realize as a product.

[0046] As can be seen from Figure 2, samples No. 1 to No. 7 were rated C, sample No. 8 was rated A, sample No. 9 was rated B, sample No. 10 was rated C, sample No. 11 was rated B, samples No. 12 and No. 13 were rated A, and samples No. 14 and No. 15 were rated C.

[0047] Figure 3 summarizes the relationship between the amount (phr) of carbon black and carbon nanotubes added to rubber materials based on the results of Figure 2. The vertical axis represents the amount of carbon black (CB) added, and the horizontal axis represents the amount of carbon nanotubes (CNT) added. "A," "B," and "C" in Figure 3 represent the overall evaluation in Figure 2.

[0048] 2 and 3, in this embodiment, the amount of carbon black added is less than 40 phr, and the amount of carbon nanotubes added is 0.5 phr or less. The amount of carbon black added is desirably 5 phr to 35 phr, preferably 10 phr to 35 phr, more preferably more than 10 phr to 30 phr, and even more preferably 20 phr to 30 phr. The amount of carbon nanotubes added is desirably 0.01 phr to 0.5 phr, preferably 0.025 phr to less than 0.5 phr, more preferably 0.025 phr to 0.3 phr, even more preferably 0.025 phr to less than 0.3 phr, and particularly preferably more than 0.025 phr to less than 0.3 phr.

[0049] Alternatively, the amount of carbon black and carbon nanotubes added in this embodiment is such that the amount of carbon black added is less than 40 phr and the amount of carbon nanotubes added is 0.5 phr or less. For example, the amount of carbon black added is preferably 5 phr to 35 phr and the amount of carbon nanotubes added is 0.01 phr to 0.5 phr, more preferably more than 10 phr to 30 phr and the amount of carbon nanotubes added is 0.025 phr to less than 0.5 phr, and more preferably less than 10 phr. Preferably, the carbon black content is greater than 10 phr and less than 30 phr, and the carbon nanotube content is between 0.025 phr and 0.3 phr, or greater than 10 phr and less than 30 phr, and the carbon nanotube content is between 0.025 phr and 0.5 phr, more preferably, the carbon black content is greater than 10 phr and less than 30 phr, and the carbon nanotube content is between 0.025 phr and 0.3 phr, and particularly preferably, the carbon black content is between 20 phr and 30 phr, and the carbon nanotube content is between 0.05 phr and 0.1 phr.

[0050] Alternatively, the amounts of carbon black and carbon nanotubes added in this embodiment are desirably 30 phr to 35 phr and 0.01 phr to less than 0.3 phr, or more than 10 phr to less than 30 phr and more than 0.05 phr to less than 0.5 phr, and preferably 30 phr to 35 phr and 0. The carbon black content is preferably from 30 phr to 35 phr and the carbon nanotube content is preferably from 0.025 phr to less than 0.3 phr, or from 10 phr to less than 30 phr and the carbon nanotube content is preferably from 0.05 phr to less than 0.5 phr, and more preferably from 30 phr to 35 phr and the carbon nanotube content is preferably from 0.025 phr to less than 0.3 phr, or from 10 phr to less than 30 phr and the carbon nanotube content is preferably from 0.05 phr to less than 0.3 phr.

[0051] However, there is also concern that increasing the amount of carbon nanotubes added will increase costs. Therefore, when cost is a consideration, it is desirable to add as little carbon nanotubes as possible. For example, if the amount of carbon nanotubes added exceeds 0.3 phr, costs will rise significantly. Therefore, when using carbon nanotubes in commercially available chemical protective gloves, it is desirable to add carbon nanotubes at a level of 0.025 phr or more but less than 0.3 phr.

[0052] In particular, at a time when accidents such as fires and explosions believed to be caused by static electricity are frequent, for example, in workplaces where highly volatile organic solvents are handled, coupled with the Ministry of Health, Labor and Welfare's notification on the selection and use of chemical protective gloves in 2017 and the amendments to the Industrial Safety and Health Regulations, etc. (new regulations to prevent industrial accidents caused by chemical substances), there has been an urgent need in recent years to commercialize protective gloves (chemical protective gloves) that combine resistance to chemical deterioration and chemical permeation with electrical conductivity. Furthermore, from the perspective of workability, protective gloves also need to have a certain degree of strength and flexibility.

[0053] The manufacturing method of rubber gloves (or the composition for manufacturing rubber products) of the present embodiment provides resistance to chemical deterioration and chemical permeation and electrical conductivity (electrical resistance value of 1×10) that can comply with the above notifications and regulatory amendments. 8 Less than Ω (e.g., 1×10 3 Ω~1×10 7 It is possible to provide chemical protective gloves that have a good resistance to water vapor and good flexibility and strength.

[0054] Specifically, as shown in FIGS. 2 and 3, for example, Sample No. 8 (when the carbon black addition amount is 20 phr and the carbon nanotube addition amount is 0.1 phr), Sample No. 12 (when the carbon black addition amount is 30 phr and the carbon nanotube addition amount is 0.05 phr), and Sample No. 13 (when the carbon black addition amount is 30 phr and the carbon nanotube addition amount is 0.1 phr) can satisfy the above evaluation criteria for chemical protective gloves in terms of strength, flexibility, and electrical resistance (receive a rating of A), and furthermore, can suppress increases in cost.

[0055] While the above embodiments have been described with reference to rubber gloves (e.g., protective gloves, chemical protective gloves), the present invention can also be applied to rubber products other than rubber gloves. Specific examples of rubber products that require resistance to chemical deterioration, resistance to chemical permeation, and electrical conductivity include protective clothing (aprons) and shoes (boots, shoe soles) as human body protection equipment.

[0056] In this case, the method for manufacturing a rubber product includes the steps of: mixing a rubber material with carbon nanotubes to produce a rubber compound; molding the rubber compound into a predetermined shape to form a rubber composition; and vulcanizing the rubber composition. The rubber compound is preferably made by mixing (equivalent amounts of) carbon nanotubes and carbon black, as in the above embodiment.

[0057] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

Claims

1. A method for producing a rubber compound, comprising: adding a second amount of solid carbon nanotubes and a third amount of carbon black to a first amount of solid rubber material, and kneading the resulting mixture in a kneader; a step of dissolving the rubber compound in an organic solvent to produce a rubber solution; a step of immersing a glove mold in the rubber solution to form a rubber composition; The rubber composition was vulcanized, and the electrical resistance was adjusted to 1×10 ８ and reducing the resistance to less than Ω; In the step of producing the rubber compound, the third amount is equal to or greater than 20 phr but less than 30 phr, and the second amount is greater than 0.05 phr but less than 0.3 phr; or the third amount is 30 phr and the second amount is greater than 0.025 phr but less than 0.3 phr; A method for manufacturing anti-static and chemical protective rubber gloves.

2. The rubber composition is formed after the rubber solution is degassed.

2. The method for manufacturing the anti-static and chemical protective rubber glove according to claim 1.

3. A fiber glove is placed on the glove mold and then immersed in the rubber solution.

2. The method for manufacturing the anti-static and chemical protective rubber glove according to claim 1.

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