CN108384078B

CN108384078B - Preparation method of conductive protective colloid gloves

Info

Publication number: CN108384078B
Application number: CN201810156556.8A
Authority: CN
Inventors: 周星余; 孙永峰
Original assignee: SHANDONG XINGYU GLOVES CO Ltd
Current assignee: SHANDONG XINGYU GLOVES CO Ltd
Priority date: 2018-02-24
Filing date: 2018-02-24
Publication date: 2021-03-05
Anticipated expiration: 2038-02-24
Also published as: CN108384078A

Abstract

The invention relates to a method for preparing conductive protective colloid gloves, which comprises dipping glove blanks in dipping glue containing conductive carbon black; vulcanizing and drying to obtain the conductive protective colloid gloves. The glove product prepared by the method has the resistivity of only 0.1-0.4 megaohm, the conductivity is improved by 1200-5000 times, and a user can operate a touch screen or adapt to the operation in a clean room after wearing the glove product.

Description

Preparation method of conductive protective colloid gloves

Technical Field

The invention relates to a preparation method of protective gloves, in particular to a preparation method of conductive protective colloid gloves.

Background

When the hand labor is used, the touch screen is frequently required to be operated, but the conventional insulating gloves cannot meet the use requirement, and when a smart phone needs to be connected and played or a person needs to operate the touch screen of some electronic control equipment or devices, the user needs to take off the gloves first and then operate the gloves, which is very inconvenient. In a semiconductor manufacturing process, a coating process, a clean room operation, or the like, it is necessary to use a work glove having conductivity. In this case, the advent of conductive gloves is well suited to meet the dual needs of labor protection and touch screen control. At present, the conductive gloves are mainly formed by improving knitted wires of glove blanks and adding conductive silk threads (such as silver threads, copper threads, carbon fibers and the like) into the glove blanks to increase the conductive function. For example, chinese patent CN102469838B discloses a work glove which is knitted wholly or partially from composite filaments containing filaments and conductive fibers, and the finished glove has a hard hand feel, is not soft and has pricked feeling. In addition, there are also some conductive gloves such as composite yarns obtained by knitting conductive fibers obtained by dyeing acrylic fibers with copper sulfide or by coating acrylic fibers with polypyrrole into filaments such as wool nylon, wool-like polyester filaments, and the like.

The conductive gloves have the advantages that although the conductivity is still good, the manufacturing process of the wires is complex, the price of the conductive fibers is high, the weaving process is complicated, the cost of the conductive gloves knitted by the composite wires is high, the situation that the conductivity is lost due to the fact that the wires are taken off from the textile gloves is easy to occur, and the gloves do not have the waterproof property of the rubber gloves.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a method for preparing conductive protective rubber gloves, which is mainly characterized in that conductive carbon black is doped into latex in the process of preparing dipping mucilage, so that finished products of the gloves have conductivity due to the doping of the conductive carbon black, and the protective rubber gloves suitable for operating touch screens or semiconductor manufacturing processes are prepared.

In order to achieve the purpose, the invention adopts the main technical scheme that: a method for preparing conductive protective colloid gloves comprises dipping glove blanks in dipping mucilage containing conductive carbon black; vulcanizing and drying to obtain the conductive protective colloid gloves.

According to one embodiment of the invention, the conductive carbon black is added to the latex in the form of an aqueous conductive carbon black dispersion to form a dipping cement. The water-dispersed conductive carbon black is adopted, so that toxic volatile organic solvents such as dimethyl formamide DMF and the like can be avoided. In addition, through a plurality of experiments, the glove product manufactured by adding the water-dispersible conductive carbon black into the impregnated rubber cement has better conductivity than the glove product manufactured by adding the oil-soluble conductive carbon black.

Preferably, the conductive carbon black is nano conductive carbon black with the particle size of less than or equal to 100 mu m, and more preferably 20-100 nm. In the present invention, the smaller the particle diameter of the conductive carbon black, the greater the number of conductive carbon black particles per unit volume in the aqueous conductive carbon black dispersion, which is more advantageous for improving the conductivity of the product.

According to one embodiment of the present invention, the conductive carbon black aqueous dispersion is prepared by: by weight, 90-120 parts of conductive carbon black, 2-7 parts of a dispersing agent, 0-5 parts of alkali and 750 parts of 600-750 parts of water are mixed and homogenized to prepare the conductive carbon black water dispersion liquid.

Wherein the alkali is added in an amount of more than 0(2, 5)]The method can be used for adjusting the pH of the conductive carbon black aqueous dispersion to alkalinity and increasing the compatibility and mixing homogeneity of the conductive carbon black aqueous dispersion and latex (the latex is alkaline). In a water washing system, the particles are dispersed stably mainly by steric hindrance repulsion and electric repulsion, and the dispersion stability of the particles in water can be influenced by changing the electric repulsion among the particles by adjusting the pH value. The conductive carbon black is composed of a series of polycyclic aromatic hydrocarbons in different oxidation stages, different cyclic compounds are overlapped to form microcrystals, and the microcrystals are further staggered and gathered to form carbon black particles of about 100 nm. Due to different post-treatment processes, the surface of the carbon black is provided with oxidation functional groups with different degrees, such as-OH, -COOH, -COOR and the like, so that the surface of the carbon black is in different acid-base states, and protons (H) are easily adsorbed in an aqueous dispersion system⁺) Or hydroxyl particles (OH)^-) But exhibit different acidity or basicity. Wherein, the alkali in the step S1 is one or a combination of more of potassium hydroxide, sodium hydroxide and ammonia water.

According to one embodiment of the invention, 3-8 parts of coupling agent is further added during preparation of the conductive carbon black water dispersion liquid.

The addition of the coupling agent can enable the conductive carbon black and the latex to generate crosslinking, improve the dispersion degree and stability of the conductive carbon black in the dipping mucilage and avoid the conductive carbon black from being separated out of a product. The coupling agent is also called a bridge because the two ends of the coupling agent can combine two substances with different properties by chemical or physical action. In step S1, the conductive carbon black is physically or chemically treated by the coupling agent, so that the conductive carbon black is changed from a polar hydrophilic surface to an oleophilic surface, thereby achieving tight bonding with latex and improving various performances of the dipping mucilage. The coupling agent is preferably one or a combination of more of silane coupling agents and titanate coupling agents.

The silane coupling agent can improve the heat resistance, water resistance, weather resistance and other performances of the product, and the molecular formula of the silane coupling agent is RsiX₃Wherein R is a non-hydrolyzable reactive organic functional group such as epoxy, vinyl, methacrylate, etc., and X is a hydrolyzable group such as halogen, alkoxy, acyloxy, etc. Therefore, the silane coupling agent can interact with hydroxyl in the conductive carbon black and long molecular chains in the latex, so that two materials with different properties are coupled, and the purpose of improving the colloidal property of the product is achieved.

The titanate coupling agent can obviously improve the impact strength of the product colloid, has better melt fluidity at the processing temperature, and can provide various functions of corrosion resistance, heat resistance, oxidation resistance and the like, so that the titanate coupling agent not only can be a coupling agent, but also has various effects of a dispersing agent, an adhesion promoter, a curing catalyst, a flame retardant and the like in the dipping mortar. Titanate coupling agent of the general formula (RO)_m-Ti-(OX-R’-Y)_nWherein m is more than or equal to 1 and less than or equal to 4, and m + n is less than or equal to 6; r is short carbon chain alkyl; r' is a long carbon chain alkyl group; x is C, N, S element; y is a double bond or the like.

According to one embodiment of the invention, the impregnating cement is prepared by: mixing 90-120 parts by weight of pre-vulcanized latex with 4-10 parts by weight of conductive carbon black aqueous dispersion, 0-3 parts by weight of foaming agent and 0.5-5 parts by weight of thickening agent, and blending to obtain dipping mucilage; wherein the prevulcanization latex is one or a combination of a prevulcanization butyronitrile latex, a prevulcanization neoprene latex, a prevulcanization butylbenzene latex and a prevulcanization natural latex. In the present invention, polyurethane latex is not recommended because polyurethane is subjected to a chemical foaming process in the presence of an organic solvent and water, and the gum of the glove product is easily peeled/degummed.

Wherein, the coupling agent can be added in the preparation of the conductive carbon black aqueous dispersion or the preparation of the dipping mucilage, and if the coupling agent is not added in the preparation of the conductive carbon black aqueous dispersion, the dipping mucilage is prepared by the following method: mixing 90-120 parts by weight of pre-vulcanized latex with 4-10 parts by weight of conductive carbon black aqueous dispersion, 0-3 parts by weight of foaming agent, 0.5-5 parts by weight of thickening agent and 0.05-0.12 part by weight of coupling agent, and blending to obtain dipping cement; wherein the prevulcanization latex is one or a combination of a prevulcanization butyronitrile latex, a prevulcanization neoprene latex, a prevulcanization butylbenzene latex and a prevulcanization natural latex.

Wherein the foaming agent is 0-3 parts, and when the foaming agent is 0 part, the prepared dipping mucilage is non-foaming mucilage; when the foaming agent is more than 0, the prepared dipping mucilage is foaming mucilage. The foaming agent is one or any combination of potassium oleate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and potassium laurate.

Preferably, when the adding part of the foaming agent is more than 0 (not containing 0), the glove intermediate product after gum dipping is dipped into a surface treatment agent containing alcohol and organic acid for 2-5 seconds, so that a frosted rough surface is formed on the surface of the foamed rubber surface of the glove under the double actions of emulsion breaking and solidification of the surface treatment agent, and then the conductive protective frosted-like rubber glove is prepared through vulcanization and drying. Wherein the surface treatment agent comprises 10 parts by mass of alcohol and 2-5 parts by mass of organic acid; wherein the alcohol is methanol, ethanol or propanol, and the organic acid is acetic acid, benzoic acid, phenylacetic acid or formic acid. The alcohol in the surface treating agent is used for demulsification on one hand to enable the foamed rubber surface of the glove blank to form a dimpled and dimpled sand-imitating rough surface, and the alcohol in the surface treating agent is used as a curing agent on the other hand to promote the coagulation of the rubber cement on the surface of the glove blank. Organic acid (formic acid, acetic acid or benzoic acid, phenylacetic acid) in the surface treating agent reacts with the alkaline latex, and mainly plays a role in promoting the coagulation of the rubber surface.

If the addition part of the foaming agent is more than 0 (not containing 0), but the processing is not carried out, the conductive protective foaming smooth surface rubber glove is obtained after vulcanization and drying.

Preferably, the dispersant is one or a combination of several of sodium methylene dinaphthalenesulfonate (a diffusant NNO) and sodium dibutyl naphthalenesulfonate. The dispersing agent is beneficial to improving the dispersibility of the conductive carbon black in the dipping mucilage, improving the mixing speed with latex, improving the adhesiveness of the dipping mucilage and improving the hardness and the wear resistance of a final product. The dispersant is a surfactant which has two opposite properties of lipophilicity and hydrophilcity in a molecule. The amphiphilic agents required to uniformly disperse solid and liquid particles that are difficult to dissolve in liquids, while also preventing settling and agglomeration of the particles, to form stable suspensions/dispersions. The methylene dinaphthalene sodium sulfonate and the dibutyl dinaphthalene sodium sulfonate are anionic surfactants substantially, have good diffusibility and low foaming capacity, and can be mixed with other anionic and nonionic surfactants. The sodium dibutylnaphthalenesulfonate can be used as a penetrant, an emulsifier, etc. in addition to a dispersant. The anionic surfactant can make the prepared impregnating mucilage more stable than the cationic surfactant.

Preferably, the thickener used is one of sodium carboxymethylcellulose CMC, sodium polyacrylate, casein, polyvinyl alcohol PVA, hydroxymethylethylcellulose, hydroxyethylpropylcellulose or any combination of the foregoing. The dipping mucilage is prepared to the viscosity of 1400-2500 mpa.s by the thickening agent. The viscosity determines the thickness of the glove product colloid, and the viscosity can be adjusted to a required value according to the requirement; the viscosity of the impregnating size may be suitably high when it is desired to form a frosted surface, whereby the glove article does not become excessively thick after the frosted surface has been formed by the surface treatment.

Preferably, the used glove blank is a chemical fiber knitted glove blank or a cotton wool cloth glove blank, and when the glove blank is the chemical fiber knitted glove blank, before gum dipping treatment, the glove blank further comprises a pretreatment step of dipping a coagulant, wherein the coagulant is an alcoholic solution of calcium chloride, an alcoholic solution of calcium nitrate or an alcoholic solution of zinc chloride, the alcohol is liquid alcohol such as methanol, ethanol, propanol and the like at normal temperature, and the temperature of the glove blank is 45-55 ℃ when the coagulant is dipped.

The holes of the blank of the chemical fiber knitted glove are large, if the pre-dipping coagulant treatment is not carried out, the glue can permeate into the inner side (the side contacted with the skin of the hand) of the blank of the glove during dipping, so that the user feels uncomfortable and the product is not satisfactory. The holes of the cotton interlock gloves are very small, and the cotton interlock gloves can not permeate the inner side after being dipped with glue. When the coagulant is soaked, the glove blank needs to be heated to a certain temperature, so that alcohol (liquid alcohol such as methanol or ethanol at normal temperature) in the coagulant can be volatilized quickly, otherwise, if the temperature of the glove when the glove is soaked in the coagulant is too low, the alcohol liquid is difficult to volatilize in time, a series of problems such as dripping, glue permeation or peeling can occur during subsequent gum dipping processing, and therefore the glove blank needs to have a certain temperature, preferably 45-55 ℃ when the coagulant is soaked.

Preferably, the vulcanization drying comprises two stages of low-temperature vulcanization drying and high-temperature vulcanization drying; the low-temperature vulcanization drying temperature is 65-85 ℃ and the time is 25-45 min; the high-temperature vulcanization temperature is 100-120 ℃ and the time is 60-90 min.

The vulcanization drying is divided into two steps for treatment, and the advantages are that: because the latex film forming process is slow, a compact accumulation process is required, if high-temperature vulcanization is used at the beginning, a compact film is easily formed on the surface of a product to seal moisture, and because the moisture in the interior of the product is more, the water vapor cannot be discharged, and only bubbles can be formed on the surface of the product, so that serious product defects are caused, especially for latex dipping thick products, the low-temperature vulcanization (less than or equal to 85 ℃) is required for about 30 minutes, so that the product is easier to process, and the defects are avoided; and then carrying out high-temperature vulcanization (not less than 100 ℃) for more than 60 minutes to achieve the product usability and production standard.

In the present application, the prevulcanised latex: the latex dispersion is prepared by adding a certain amount of vulcanizing agent into the latex dispersion and carrying out vulcanization pretreatment under the heating condition.

The invention has the beneficial effects that:

compared with the gloves prepared by changing the knitting fiber components of the glove blanks, or wrapping/winding the conductive wires by the knitting fibers before knitting or doping the conductive wires in the knitting process, the gloves prepared by the method have the advantages that the production cost is reduced by more than 50 percent, and the conductivity of the glove products is equivalent to that of the gloves with the conductive wires. Therefore, the method of the invention can save mass production cost, the hand feeling of the manufactured gloves is more comfortable and the gloves are soft and fit, and meanwhile, the production efficiency can be obviously improved because the conductive fibers are not used to be embedded into the glove blanks.

According to the invention, when the impregnating adhesive cement is prepared, the conductive carbon black water dispersion liquid is doped, so that on one hand, the use of DMF (dimethyl formamide) toxic volatile organic solvent can be avoided, and simultaneously, the final glove product has better conductivity. The addition of the coupling agent can enable the conductive carbon black and the latex to generate crosslinking, improve the dispersity and stability of the conductive carbon black in the dipping mucilage, avoid the conductive carbon black from being separated out of a product, and simultaneously improve the heat resistance, the corrosion resistance and the oxidation resistance of a glove product. When preparing the conductive carbon black aqueous dispersion, adding alkali to change the surface property of the conductive carbon black, adjusting the pH value to be alkaline, and increasing steric repulsion and electric repulsion between the conductive carbon black aqueous dispersion and alkaline latex particles so as to achieve stable dispersion.

Tests show that the surface resistivity of the rubber gloves produced by dipping the rubber cement prepared by the conventional method is as high as 500 megaohms, while the glove product prepared by the method has the resistivity of only 0.1-0.4 megaohms, the conductivity is improved by 1200-5000 times, and a user can control a touch screen or adapt to dust-free indoor operation after wearing the glove product. Meanwhile, the wear resistance, corrosion resistance, heat resistance, comfort, softness and fitting degree reach the industrial standard or use requirement.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1

Step S1, preparing a conductive carbon black water dispersion liquid: by weight, 100 parts of conductive carbon black (average particle size 100nm), 4 parts of dispersant NNO, 5 parts of titanate coupling agent, 1.5 parts of potassium hydroxide and 650 parts of water were mixed and homogenized to prepare a conductive carbon black aqueous dispersion.

Step S2, preparing dipping mucilage: and (2) taking 100 parts by weight of pre-vulcanized butyronitrile latex, 7 parts by weight of the conductive carbon black aqueous dispersion prepared in the step S1, 2 parts by weight of a potassium oleate foaming agent and 2 parts by weight of CMC (mass fraction of 2%) and foaming to 1.3 times to obtain the foaming dipping adhesive cement with the viscosity of 2500 mpa.s.

Step S3, dipping the glove blank into glue: and (3) when the temperature of the chemical fiber knitted glove blank is 50 ℃, soaking the chemical fiber knitted glove blank into a 2% calcium nitrate methanol solution coagulant for coagulating agent soaking treatment, and then soaking the chemical fiber knitted glove blank into the foaming soaking glue paste prepared in the step S2.

Step S_3-4Dipping surface treating agent: the method comprises the following steps of (1) preparing methanol: and (4) mixing acetic acid according to the mass ratio of 8:1 to prepare a surface treating agent, and soaking the glove intermediate product treated in the step S3 in the surface treating agent for 2-3 seconds and then taking out.

Step S4, vulcanization drying: and (3) pre-vulcanizing and drying the glove intermediate product at 75 ℃ for 30min, and finally preparing the conductive protective frostlike rubber glove at the high-temperature vulcanization temperature of 110-115 ℃ for 80 min.

Example 2

Step S1, preparing a conductive carbon black water dispersion liquid: by weight, 100 parts of conductive carbon black (average particle diameter 100nm), 4 parts of dispersant NNO, 1.5 parts of potassium hydroxide, 650 parts of water were mixed and homogenized to prepare a conductive carbon black aqueous dispersion.

Step S2, preparing dipping mucilage: and (2) mixing 100 parts by weight of pre-vulcanized butyronitrile latex with 7 parts by weight of the conductive carbon black aqueous dispersion prepared in the step S1, 0.075 part by weight of a titanate coupling agent, 2 parts by weight of a potassium oleate foaming agent and 2 parts by weight of CMC (2%), and foaming to 1.3 times to obtain the foaming dipping mortar with the viscosity of 2500 mpa.s.

Step S_3-4Dipping surface treating agent: the method comprises the following steps of (1) preparing methanol: and (4) mixing formic acid according to the mass ratio of 8:1 to prepare a surface treating agent, and soaking the glove intermediate product treated in the step S3 in the surface treating agent for 2-3 seconds and then taking out.

The difference between example 2 and example 1 is that the titanate coupling agent is added in step S2 and mixed into the impregnating cement, whereas example 1 is that the coupling agent is added in S1. The coupling agent mainly serves the purpose of binding the latex material with the conductive carbon black, and therefore may be added in step S1 or step S2.

Example 3

Step S1, preparing a conductive carbon black water dispersion liquid: by weight, 90 parts of conductive carbon black (average particle diameter 100nm), 2 parts of dispersant NNO, 3 parts of silane coupling agent, and 600 parts of water were mixed and homogenized to prepare a conductive carbon black water dispersion.

Step S2, preparing dipping mucilage: by weight, 90 parts of prevulcanized neoprene latex, 4 parts of the conductive carbon black aqueous dispersion prepared in the step S1 and 0.5 part of hydroxymethyl ethyl cellulose are mixed to prepare dipping mucilage with the viscosity of 1700 mpa.s.

Step S3, dipping the glove blank into glue: and (3) when the temperature of the chemical fiber knitted glove blank is 50 ℃, soaking the chemical fiber knitted glove blank into a 5% zinc chloride methanol solution coagulant for coagulating agent treatment, and then soaking the chemical fiber knitted glove blank into the soaking glue paste prepared in the step S2.

Step S4, vulcanization drying: pre-vulcanizing and drying the glove intermediate product at 65 ℃ for 45min, and finally preparing the conductive protective flat plate (smooth surface) colloid glove at the high-temperature vulcanization temperature of 100 ℃ for 90 min.

The main difference between example 3 and example 1 is that no base is added to adjust the pH in step S1 and no foaming agent is added in step S, so the impregnating cement prepared is a non-foamed cement. In addition, embodiment 3 also does not include step S_3-4Dipping surface treating agent, so that the gloves obtained by vulcanization and drying are flat plate rubber gloves with conductivity。

Example 4

Step S1, preparing a conductive carbon black water dispersion liquid: by weight, 120 parts of conductive carbon black (average particle size 100nm), 7 parts of dispersant sodium dibutylnaphthalenesulfonate, 8 parts of silane coupling agent, 5 parts of sodium hydroxide, and 750 parts of water were mixed and homogenized to prepare a conductive carbon black aqueous dispersion.

Step S2, preparing dipping mucilage: and (2) mixing 120 parts by weight of pre-vulcanized styrene-butadiene latex, 10 parts by weight of the conductive carbon black aqueous dispersion prepared in the step S1, 3 parts by weight of a potassium laurate foaming agent and 5 parts by weight of a thickening agent PVA, and foaming to 1.2 times to obtain the foaming dipping mucilage with the viscosity of 2000 mpa.s.

Step S3, dipping the glove blank into glue: and (3) when the temperature of the chemical fiber knitted glove blank is 55 ℃, soaking the chemical fiber knitted glove blank into a 5% calcium chloride ethanol solution coagulant, soaking the coagulant in the coagulant, and then soaking the chemical fiber knitted glove blank into the foaming soaking glue paste prepared in the step S2.

Step S_3-4Dipping surface treating agent: the method comprises the following steps of: and (3) mixing benzoic acid according to the mass ratio of 10:2 to prepare a surface treating agent, and soaking the glove intermediate product treated in the step S3 in the surface treating agent for 2-3 seconds and then taking out.

Step S4, vulcanization drying: and (3) pre-vulcanizing and drying the glove intermediate product at 70 ℃ for 35min, and finally preparing the conductive protective frostlike rubber glove at the high-temperature vulcanization temperature of 110-115 ℃ for 75 min.

Example 5

Step S1, preparing a conductive carbon black water dispersion liquid: by weight, 100 parts of conductive carbon black (average particle diameter 100nm), 4 parts of dispersant NNO, 4 parts of silane coupling agent, and 700 parts of water were mixed and homogenized to prepare a conductive carbon black aqueous dispersion.

Step S2, preparing dipping mucilage: and (2) mixing 100 parts by weight of pre-vulcanized natural latex, 8 parts by weight of the conductive carbon black aqueous dispersion prepared in the step S1, 2 parts by weight of a sodium oleate foaming agent and 4 parts by weight of a thickening agent casein, and foaming to 1.2 times to obtain the foaming dipping adhesive cement.

Step S3, dipping the glove blank into glue: and (3) when the temperature of the chemical fiber knitted glove blank is 55 ℃, soaking the chemical fiber knitted glove blank into a 4% calcium chloride ethanol solution coagulant, and soaking the chemical fiber knitted glove blank into the foaming soaking glue paste prepared in the step S2 after the coagulant is soaked.

Step S4, vulcanization drying: and (3) pre-vulcanizing and drying the glove intermediate product at 70 ℃ for 35min, and finally preparing the conductive protective foamed rubber glove with the flat surface at the high-temperature vulcanization temperature of 110-115 ℃ for 75 min.

In the difference between example 5 and example 4, although 2 parts of foaming agent is added in step S2, this example does not include the treatment of impregnating surface treatment agent, so that the conductive protective foamed rubber glove with flat surface is prepared after vulcanization and drying.

Example 6

Step S1, preparing a conductive carbon black water dispersion liquid: by weight, 100 parts of conductive carbon black (average particle size 100nm), 4 parts of dispersant NNO, 5 parts of ammonia water (mass fraction 25-28%), 6 parts of silane coupling agent and 700 parts of water are mixed and homogenized to prepare the conductive carbon black water dispersion.

Step S2, preparing dipping mucilage: and (2) mixing 110 parts by weight of pre-vulcanized neoprene latex, 6 parts by weight of the conductive carbon black aqueous dispersion prepared in the step S1, 3 parts by weight of a lauric acid foaming agent and 4 parts by weight of a thickening agent hydroxymethyl ethyl cellulose, and foaming to 1.2 times to obtain the foaming dipping mucilage.

Step S3, dipping the glove blank into glue: and (3) when the temperature of the chemical fiber knitted glove blank is 50 ℃, soaking the chemical fiber knitted glove blank into a 3% zinc chloride ethanol solution coagulant, soaking the coagulant in the coagulant, and then soaking the chemical fiber knitted glove blank into the foaming soaking glue paste prepared in the step S2.

Step S_3-4Dipping surface treating agent: the method comprises the following steps of (1) preparing propyl alcohol: benzoic acid was mixed at a mass ratio of 10:4 to prepare a surface treatment agent, and the glove intermediate treated in step S3 was dipped in the surface treatment agent for 3 seconds and then taken out.

Step S4, vulcanization drying: and (3) pre-vulcanizing and drying the glove intermediate product at 75 ℃ for 3min, and finally preparing the conductive protective colloid glove with the frosted surface at the high-temperature vulcanization temperature of 115-120 ℃ for 70 min.

Gloves made according to the methods of examples 1-6 meet industry standards or use requirements for abrasion resistance, corrosion resistance, heat resistance, comfort, softness, and fit. Meanwhile, through resistivity test, the resistivity of the glove prepared by the method is between 0.1 and 0.4 megaohms, and the glove can be used for operating a touch screen of a smart phone; compared with the glove product treated by the sizing material prepared by the conductive carbon black-free water dispersion liquid, the resistivity of the glove product is up to 500 megaohms. The process of the invention can therefore be used to produce protective gloves having electrically conductive properties.

Claims

1. A preparation method of conductive protective colloid gloves is characterized in that: dipping the glove blank in dipping mucilage containing conductive carbon black;

dipping the glove intermediate product subjected to gum dipping treatment into a surface treatment agent containing alcohol and organic acid to form a frosted rough surface; the surface treatment agent comprises 10 parts by mass of alcohol and 2-5 parts by mass of organic acid; wherein the alcohol is methanol, ethanol or propanol, and the organic acid is acetic acid, benzoic acid, phenylacetic acid or formic acid;

vulcanizing and drying to obtain the conductive protective colloid gloves;

adding the conductive carbon black into latex in the form of conductive carbon black water dispersion to form dipping mucilage; the conductive carbon black aqueous dispersion is prepared by the following method: mixing and homogenizing 90-120 parts by weight of conductive carbon black, 2-7 parts by weight of a dispersing agent, 0-5 parts by weight of alkali, 3-8 parts by weight of a silane coupling agent or a titanate coupling agent and 600-750 parts by weight of water to prepare a conductive carbon black water dispersion liquid; the addition part of the alkali is more than 0, and the alkali is used for adjusting the pH of the conductive carbon black water dispersion liquid to be alkaline, and the alkali is one or a combination of potassium hydroxide, sodium hydroxide and ammonia water.

2. The method of claim 1, wherein: the dipping mucilage is prepared by the following method: mixing 90-120 parts by weight of pre-vulcanized latex with 4-10 parts by weight of conductive carbon black aqueous dispersion, 0-3 parts by weight of foaming agent and 0.5-5 parts by weight of thickening agent, and blending to obtain dipping mucilage; the pre-vulcanized latex is one or a combination of a plurality of pre-vulcanized butyronitrile latex, pre-vulcanized neoprene latex, pre-vulcanized butadiene-styrene latex and pre-vulcanized natural latex.

3. The method of claim 1, wherein: the dipping mucilage is prepared by the following method: mixing 90-120 parts by weight of pre-vulcanized latex with 4-10 parts by weight of conductive carbon black aqueous dispersion, 0.05-0.12 part by weight of coupling agent, 0-3 parts by weight of foaming agent and 0.5-5 parts by weight of thickening agent, and blending to obtain dipping adhesive cement; the pre-vulcanized latex is one or a combination of a plurality of pre-vulcanized butyronitrile latex, pre-vulcanized neoprene latex, pre-vulcanized butadiene-styrene latex and pre-vulcanized natural latex.

4. The production method according to claim 2 or 3, wherein the addition part of the foaming agent is more than 0; the foaming agent is one or any combination of potassium oleate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and potassium laurate.

5. The preparation method according to claim 1 or 3, wherein the coupling agent is one or more of a silane coupling agent and a titanate coupling agent.