CN112029208A - Oil-resistant polyvinyl chloride gloves and preparation process thereof - Google Patents
Oil-resistant polyvinyl chloride gloves and preparation process thereof Download PDFInfo
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- C08J5/02—Direct processing of dispersions, e.g. latex, to articles
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
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- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
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Abstract
The invention discloses an oil-resistant polyvinyl chloride glove and a preparation process thereof, wherein the prepared glove has good elasticity and stretching degree through the mutual matching of PVC resin powder and rubber, the appearance of the glove can be smoother through the addition of water-based PU (polyurethane) rubber, and the oil resistance of the glove can be improved through the mutual matching of carboxyl butyronitrile latex and an oil resistant agent.
Description
Technical Field
The invention relates to the technical field of glove manufacturing, in particular to an oil-resistant polyvinyl chloride glove and a preparation process thereof.
Background
The PVC gloves are made of polyvinyl chloride through a special process, do not contain allergens, powder, dust and other components, have high chemical resistance, good flexibility and touch feeling, are convenient and comfortable to wear, have antistatic performance, and can be used in a dust-free environment, and are characterized in that the gloves are free of powder, low in dust generation amount, low in ion content, free of plasticizer, ester, silicone oil and other components: the oil-resistant polyvinyl chloride gloves have weak acid and weak base resistance, low ion content and good flexibility and touch feeling, are suitable for production processes of semiconductors, liquid crystals, hard disks and the like, but have poor oil-resistant effect in the existing polyvinyl chloride gloves.
Disclosure of Invention
The invention aims to provide an oil-resistant polyvinyl chloride glove and a preparation process thereof, and aims to solve the technical problem of oil resistance of the polyvinyl chloride glove in the prior art.
In order to achieve the purpose, the oil-resistant polyvinyl chloride gloves are prepared from the following raw materials in parts by mass:
80-100 parts of carboxylated nitrile latex, 15-25 parts of vulcanizing agent, 180-200 parts of PVC resin powder, 40-60 parts of plasticizer, 10-20 parts of stabilizer, 20-30 parts of oil resistant agent, 20-30 parts of rubber, 15-25 parts of viscosity reducer, 10-30 parts of coagulant, 10-30 parts of surface treating agent and 10-20 parts of aqueous PU adhesive.
The invention also provides a preparation process of the oil-resistant polyvinyl chloride gloves, which comprises the following steps:
heating and mixing the carboxylated nitrile latex and a vulcanizing agent in parts by mass to prepare a first colloid;
heating and mixing PVC resin powder and rubber in parts by mass, sequentially adding a plasticizer, a stabilizer, an oil resistance agent and a viscosity reducer, and heating and mixing to obtain a second colloid;
preheating the hand mold, immersing the preheated hand mold into a first colloid, then immersing into a coagulant in a coagulation tank, then baking for the first time, then immersing into a surface treatment agent, and then baking for the second time;
immersing the hand mold after the second baking into a second colloid, then spraying slurry, putting the hand mold after slurry spraying into an oven for third baking, putting the hand mold into a sand material for sand leaching after the third baking is finished, then spraying sand, and putting the hand mold into the oven for fourth baking after sand spraying is finished;
adding the aqueous PU glue in parts by mass into softened water, stirring, adding ammonia water to adjust the pH value to 8-10, feeding the mixture into a PU trough, and placing the hand mold baked for the fourth time into the PU trough;
and taking out the hand mold in the PU trough, putting the hand mold into an oven for baking for the fifth time, and sequentially rolling the hand mold subjected to baking for the fifth time, demolding, inspecting and sorting to obtain the oil-resistant polyvinyl chloride glove.
Wherein, in the step of preparing the first colloid by heating and mixing the carboxylated nitrile latex and the vulcanizing agent in parts by mass:
the carboxylic butyronitrile emulsion and the vulcanizing agent are stirred by a stirrer and heated by a heater, the stirring speed is 400-600 r/min, the heating temperature is 100-120 ℃, and the stirring and heating time is 20-30 min, wherein the vulcanizing agent consists of 8-10 parts of sulfur, 12-16 parts of zinc oxide, 3-5 parts of an anti-aging agent, 4-6 parts of TMTD, 6-8 parts of titanium dioxide, 4-6 parts of 3% CMC, 5-7 parts of water, 6-8 parts of sulfur monochloride and 3-5 parts of benzoyl peroxide.
Wherein, in the step of taking the mass portion of PVC resin powder and rubber to heat and mix, and adding the plasticizer, the stabilizer, the oil resistant agent and the viscosity reducer in turn to heat and mix, so as to prepare a second colloid:
the PVC resin powder and the rubber are heated and mixed by a stirrer and a heater, wherein the stirring speed is 500-700 r/min, the heating temperature is 130-160 ℃, and the stirring and heating time is 15-25 min;
in the heating and mixing process of sequentially adding the plasticizer, the stabilizer, the oil resistance agent and the viscosity reducer, the stirring speed is 600-800 r/min, the heating temperature is 150-170 ℃, and the stirring and heating time is 10-20 min;
the plasticizer is one or more of epoxy fatty acid methyl ester, DINCH, DBE and TXIB;
the stabilizer is one or more of ATBC, CZ-F990 and zinc stearate;
the viscosity reducer is D70 or D80.
Wherein the oil proofing agent comprises polyoxyethylene-polyoxypropylene octyl ether caprylate, polyoxy alkylene ether, propyl palmitate, sodium alkyl sulfonate, dodecylamine polyoxypropylene monododecenyl succinate, sodium dodecyl sulfate and erucamide propyl betaine.
The method comprises the following steps of preheating a hand model, filtering a first colloid and a second colloid by using a 1000-1200-mesh filter screen, defoaming the filtered first colloid and the filtered second colloid for 5-7 times in vacuum, keeping the first colloid and the filtered second colloid at a negative pressure of-0.1-0.9 MP, standing for 5-10 min/time, and preheating for 1-2 h.
Wherein, preheating the hand model, immersing the preheated hand model into a first colloid, then immersing into a coagulant in a coagulation tank, then carrying out first drying, then immersing into a surface treating agent, and then carrying out second drying:
preheating the hand mold at the temperature of 50-70 ℃, dipping the preheated hand mold into a first colloid, dripping for 2-3 min, dipping into a coagulant in a coagulation tank, performing first baking at the temperature of 100-120 ℃ for 8-10 min, dipping into a surface treating agent after the first baking is completed, and performing second baking at the temperature of 110-130 ℃ for 4-6 min;
wherein the coagulant is a methanol solution of calcium nitrate with the mass concentration of 3-6%, and the surface treating agent is a toluene solution of PUD with the mass concentration of 40-50%.
Wherein, immerging the hand former after toasting the second time to the second colloid in, then drench the thick liquid, drench the hand former after the thick liquid and put into to the oven and carry out the third time and toast, put into the sand material after the third time toasts and soak the sand, later drench the sand again, drench put into the step of carrying out the fourth toasting in the oven with the hand former after the sand is accomplished:
the slurry pouring time is 2-4 min, the third baking temperature is 150-160 ℃, the time is 5-7 min, the viscosity of the sand material is 700-900 Pa.s, the sand leaching time is 4-8 min, the sand pouring time is 3-5 min, the fourth baking temperature is 180-200 ℃, and the time is 8-12 min.
Wherein, taking out the hand mould in the PU silo, putting into the oven to bake for the fifth time, and the hand mould baked for the fifth time is in the step of obtaining the oil-proof polyvinyl chloride gloves after the lip curling, demoulding, checking and sorting in sequence:
the fifth baking temperature is 200-240 ℃, and the time is 10-20 min.
The invention has the beneficial effects that: the prepared gloves have good elasticity and stretching degree through the mutual matching of the PVC resin powder and the rubber, the appearance of the gloves is smoother due to the addition of the water-based PU glue, and the oil resistance of the gloves can be improved due to the mutual matching of the carboxyl butyronitrile latex and the oil resistant agent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the steps of example 1 of the present invention.
Fig. 2 is a flowchart of the steps of embodiment 2 of the present invention.
Fig. 3 is a flowchart of the steps of embodiment 3 of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The invention provides an oil-resistant polyvinyl chloride glove and a preparation process thereof, wherein the oil-resistant polyvinyl chloride glove adopts 80-100 parts of carboxyl butyronitrile latex, 15-25 parts of vulcanizing agent, 180-200 parts of PVC resin powder, 40-60 parts of plasticizer, 10-20 parts of stabilizer, 20-30 parts of oil-resistant agent, 20-30 parts of rubber, 15-25 parts of viscosity reducer, 10-30 parts of coagulant, 10-30 parts of surface treating agent and 10-20 parts of aqueous PU collagen material, and also adopts 6-8 parts of dichloroethylene, 6-8 parts of tert-butyl acrylate, 6-8 parts of ethylene glycol dimethacrylate, 6-8 parts of diallyl maleate, 10-12 parts of polybutene and 10-12 parts of antistatic agent, and 6-8 parts of dichloroethylene, 6-8 parts of tert-butyl acrylate, 6-8 parts of ethylene glycol dimethacrylate, 6-8 parts of diallyl maleate, 10-12 parts of polybutene and 10-12 parts of antistatic agent are heated and mixed together with the carboxylated butyronitrile latex and the vulcanizing agent; the rubber is one or more of styrene butadiene rubber, nitrile butadiene rubber, ethylene propylene diene monomer rubber and isoprene rubber.
Please refer to FIG. 1, example 1
S100: 80 parts of carboxylic acrylonitrile butadiene latex, 15 parts of vulcanizing agent, 6 parts of dichloroethylene, 6 parts of tert-butyl acrylate, 6 parts of ethylene glycol dimethacrylate, 6 parts of diallyl maleate, 10 parts of polybutene and 10 parts of antistatic agent are taken to be heated and mixed at the stirring speed of 400r/min, the heating temperature of 100 ℃ and the time of 20min to prepare a first colloid;
s200: heating and mixing 180 parts of PVC resin powder and 20 parts of styrene butadiene rubber at the rotating speed of 500r/min and the heating temperature of 130 ℃ for 15min, sequentially adding 40 parts of DINCH, 10 parts of ATBC, 20 parts of oil resistant agent and 15 parts of D70, and heating and mixing at the heating temperature of 150 ℃ for 10min to prepare a second colloid;
s300: filtering the first colloid and the second colloid by using a 1000-mesh filter screen, and carrying out vacuum defoamation on the filtered first colloid and the filtered second colloid for 5 times, wherein the negative pressure is-0.1 MP, standing for 5 min/time, and preheating for 1 h;
s400: preheating a hand mold to 50 ℃, immersing the preheated hand mold into a first colloid, taking out, dripping for 2min, then immersing into a methanol solution of 3% calcium nitrate by mass concentration in a solidification pool, then carrying out primary baking at 100 ℃ for 8min, then immersing into a toluene solution of 40% PUD by mass concentration, and then carrying out secondary baking at 110 ℃ for 4 min;
s500: immersing the hand mold after the second baking into a second colloid, then spraying slurry for 2min, putting the hand mold after slurry spraying into an oven, baking for the third time at the temperature of 150 ℃ for 5min, putting the hand mold into a sand material with the viscosity of 700Pa.s after the third baking is finished, carrying out sand soaking for 4min, then spraying sand for 3min, putting the hand mold into the oven after sand spraying is finished, and carrying out fourth baking at the temperature of 180 ℃ for 8 min;
s600: adding 10 parts of aqueous PU glue into softened water, stirring, adding ammonia water to adjust the pH value to 8, sending the mixture into a PU trough, and then placing the hand mold baked for the fourth time into the PU trough;
s700: and taking out the hand mold in the PU trough, putting the hand mold into an oven, baking for the fifth time at the temperature of 200 ℃ for 10min, and sequentially rolling the hand mold subjected to the fifth baking to obtain the oil-resistant polyvinyl chloride gloves after demolding, inspecting and sorting.
In the embodiment, the carboxylated nitrile latex is an anionic high-molecular polymer emulsion, and the latex has uniform molecular weight and particle size distribution, oil resistance, solvent resistance and acid and alkali resistance, so that the prepared gloves have good oil resistance and acid and alkali resistance by adding the carboxylated nitrile latex, and the prepared gloves can be modified by adding dichloroethylene, tert-butyl acrylate, ethylene glycol dimethacrylate, diallyl maleate and polybutylene, so that the adhesion, film forming property and oil resistance of the gloves are improved, the quality and the performance of the prepared gloves are improved, wherein the antistatic agent can be added to improve the antistatic property of the gloves, and the modified carboxylated nitrile latex can be vulcanized by a vulcanizing agent consisting of 8 parts of sulfur, 12 parts of zinc oxide, 3 parts of anti-aging agent, 4 parts of TMTD, 6 parts of titanium dioxide, 4 parts of 3% CMC, 5 parts of water, 6 parts of sulfur monochloride and 3 parts of benzoyl peroxide And (2) treating, heating and stirring to prepare a first colloid, and heating and mixing PVC resin powder, styrene butadiene rubber, DINCH, ATBC, an oil resistant agent and D70 to prepare a second colloid, wherein the PVC resin powder and the styrene butadiene rubber are heated and mixed to ensure that the prepared gloves have good elasticity and stretching degree and improve the glove quality, and the styrene butadiene rubber is a polystyrene butadiene copolymer. The physical mechanism performance, the processing performance and the service performance of the product are close to those of natural rubber, some performances such as wear resistance, heat resistance, aging resistance and vulcanization speed are better than those of the natural rubber, and the oil resistance of the glove can be further improved by using an oil resistant agent consisting of polyoxyethylene-polyoxypropylene octyl ether caprylate, polyoxy alkylene ether, propyl palmitate, sodium alkyl sulfonate, dodecylamine polyoxypropylene monododecenyl succinate, sodium dodecyl sulfate and erucamide propyl betaine; after the first colloid and the second colloid are prepared, the first colloid and the second colloid are filtered by a 1000-mesh stainless steel filter screen, large granular substances are filtered out, and the filtered first colloid and the filtered second colloid are subjected to vacuum defoaming, so that the prepared glove is more delicate in texture. Then immersing the preheated hand mold into a first colloid, taking out the preheated hand mold to drop, then immersing the hand mold into a 3% calcium nitrate methanol solution in a solidification tank, then carrying out primary baking, then immersing the hand mold into a 40% PUD toluene solution, carrying out secondary baking, immersing the hand mold after the secondary baking into a second colloid, then carrying out slurry spraying, putting the hand mold after slurry spraying into an oven for carrying out tertiary baking, carrying out sand soaking after the tertiary baking is finished, then carrying out sand spraying, and putting the hand mold into the oven for carrying out the tertiary baking after the sand spraying is finished; and then adding the water-based PU glue into softened water, stirring, adding ammonia water to adjust the pH value to 8, sending the mixture into a PU trough, placing the hand mold baked for the fourth time into the PU trough, taking out the hand mold in the PU trough, placing the hand mold into an oven to bake for the fifth time, and sequentially rolling the hand mold baked for the fifth time to form a lip, and demolding, inspecting and sorting the lip to obtain the oil-resistant polyvinyl chloride glove.
Please refer to fig. 2, example 2
S100: taking 100 parts of carboxylated nitrile latex, 25 parts of vulcanizing agent, 8 parts of dichloroethylene, 8 parts of tert-butyl acrylate, 8 parts of ethylene glycol dimethacrylate, 8 parts of diallyl maleate, 12 parts of polybutene and 12 parts of antistatic agent, and heating and mixing at the stirring speed of 600r/min, the heating temperature of 120 ℃ and the time of 30min to prepare a first colloid;
s200: heating and mixing 200 parts of PVC resin powder and 30 parts of ethylene propylene diene monomer at the rotating speed of 700r/min and the heating temperature of 160 ℃ for 25min, sequentially adding 60 parts of DBE, 20 parts of CZ-F990, 30 parts of oil resistant agent and 25 parts of D70, and heating and mixing at the heating temperature of 170 ℃ for 20min to prepare a second colloid;
s300: filtering the first colloid and the second colloid by using a 1200-mesh filter screen, and carrying out vacuum defoamation on the filtered first colloid and the filtered second colloid for 7 times, wherein the negative pressure is-0.9 MP, standing for 10 min/time, and preheating for 2 h;
s400: preheating a hand mold to 70 ℃, immersing the preheated hand mold into a first colloid, taking out, dripping for 3min, then immersing into a methanol solution of 6% calcium nitrate by mass concentration in a solidification pool, then carrying out primary baking at 120 ℃ for 10min, then immersing into a toluene solution of 50% PUD by mass concentration, and then carrying out secondary baking at 130 ℃ for 6 min;
s500: immersing the hand mold after the second baking into a second colloid, then spraying slurry for 4min, putting the hand mold after slurry spraying into an oven, baking for the third time at the temperature of 160 ℃ for 7min, putting the hand mold into a sand material with the viscosity of 900Pa.s after the third baking is finished, carrying out sand soaking for 8min, then spraying sand for 5min, putting the hand mold into the oven after sand spraying is finished, and baking for the fourth time at the temperature of 200 ℃ for 12 min;
s600: adding 20 parts of aqueous PU glue into softened water, stirring, adding ammonia water to adjust the pH value to 10, sending the mixture into a PU trough, and then placing the hand mold baked for the fourth time into the PU trough;
s700: and taking out the hand mold in the PU trough, putting the hand mold into an oven, baking for the fifth time at the temperature of 240 ℃ for 20min, and sequentially rolling the hand mold subjected to the fifth baking to obtain the oil-resistant polyvinyl chloride gloves after demolding, inspecting and sorting.
In the embodiment, the carboxylated nitrile latex is an anionic high-molecular polymer emulsion, and the latex has uniform molecular weight and particle size distribution, oil resistance, solvent resistance and acid and alkali resistance, so that the prepared gloves have good oil resistance and acid and alkali resistance by adding the carboxylated nitrile latex, and the prepared gloves can be modified by adding dichloroethylene, tert-butyl acrylate, ethylene glycol dimethacrylate, diallyl maleate and polybutylene, so that the adhesion, film forming property and oil resistance of the gloves are improved, the quality and the performance of the prepared gloves are improved, wherein the antistatic agent can be added to improve the antistatic property of the gloves, and the modified carboxylated nitrile latex can be vulcanized by a vulcanizing agent consisting of 10 parts of sulfur, 14 parts of zinc oxide, 5 parts of anti-aging agent, 6 parts of TMTD, 8 parts of titanium dioxide, 6 parts of 3% CMC, 7 parts of water, 8 parts of sulfur monochloride and 5 parts of benzoyl peroxide Treating, heating and stirring to obtain a first colloid, heating and mixing PVC resin powder, ethylene propylene diene monomer, DBE, CZ-F990, an oil resistant agent and D70 to obtain a second colloid, wherein the PVC resin powder and the ethylene propylene diene monomer are heated and mixed, so that the prepared gloves have good elasticity and stretching degree, the glove quality is improved, wherein the main chain of the ethylene propylene diene monomer is composed of chemically stable saturated hydrocarbon, and only the side chain contains unsaturated double bonds, so the ethylene propylene diene monomer has excellent ozone resistance, heat resistance, weather resistance and other aging resistance, the oil resistance of the gloves can be further improved by using an oil resistant agent consisting of polyoxyethylene-polyoxypropylene octyl ether caprylate, polyoxy alkylene ether, propyl palmitate, sodium alkyl sulfonate, dodecylamine polyoxypropylene monododecenyl succinate, sodium dodecyl sulfate and erucamide propyl betaine; after the first colloid and the second colloid are prepared, the first colloid and the second colloid are filtered by a 1200-mesh stainless steel filter screen, large granular substances are filtered out, and the filtered first colloid and the filtered second colloid are subjected to vacuum defoaming, so that the prepared glove is more delicate in texture. Then immersing the preheated hand mold into a first colloid, taking out the preheated hand mold to drop, then immersing the hand mold into a 6% calcium nitrate methanol solution in a solidification tank, then carrying out primary baking, then immersing the hand mold into a 50% PUD toluene solution, carrying out secondary baking, immersing the hand mold after the secondary baking into a second colloid, then carrying out slurry spraying, putting the hand mold after slurry spraying into an oven for carrying out tertiary baking, carrying out sand soaking after the tertiary baking is finished, then carrying out sand spraying, and putting the hand mold into the oven for carrying out the tertiary baking after the sand spraying is finished; and then adding the water-based PU glue into softened water, stirring, adding ammonia water to adjust the pH value to 10, sending the mixture into a PU trough, placing the hand mold baked for the fourth time into the PU trough, taking out the hand mold in the PU trough, placing the hand mold into an oven to bake for the fifth time, and sequentially rolling the hand mold baked for the fifth time to form a lip, and demolding, inspecting and sorting the lip to obtain the oil-resistant polyvinyl chloride glove.
Please refer to fig. 3, example 3
S100: heating and mixing 90 parts of carboxylated butyronitrile latex, 20 parts of vulcanizing agent, 7 parts of dichloroethylene, 7 parts of tert-butyl acrylate, 7 parts of ethylene glycol dimethacrylate, 7 parts of diallyl maleate, 11 parts of polybutene and 11 parts of antistatic agent at the stirring speed of 500r/min, the heating temperature of 110 ℃ for 25min to prepare a first colloid;
s200: heating and mixing 190 parts of PVC resin powder and 25 parts of styrene butadiene rubber at the rotating speed of 600r/min and the heating temperature of 145 ℃ for 20min, sequentially adding 50 parts of epoxy fatty acid methyl ester, 15 parts of ATBC, 25 parts of oil resistant agent and 20 parts of D80, and heating and mixing at the heating temperature of 160 ℃ for 15min to prepare a second colloid;
s300: filtering the first colloid and the second colloid by using a 1100-mesh filter screen, and carrying out vacuum defoamation on the filtered first colloid and the filtered second colloid for 6 times, wherein the negative pressure is-0.5 MP, standing for 8 min/time, and preheating for 1.5 h;
s400: preheating the hand mold to 60 ℃, immersing the preheated hand mold into a first colloid, taking out, dripping for 2.5min, then immersing into a methanol solution of calcium nitrate with the mass concentration of 4% in a solidification pool, then carrying out primary baking with the temperature of 110 ℃ for 9min, then immersing into a toluene solution of PUD with the mass concentration of 45%, and then carrying out secondary baking with the temperature of 120 ℃ for 5 min;
s500: immersing the hand mold after the second baking into a second colloid, then carrying out slurry spraying for 3min, putting the hand mold after slurry spraying into an oven, carrying out third baking at the temperature of 155 ℃ for 6min, putting the hand mold into a sand material with the viscosity of 800Pa.s for sand soaking for 6min after the third baking is finished, then carrying out sand spraying for 4min, putting the hand mold into the oven after the sand spraying is finished, and carrying out fourth baking at the temperature of 190 ℃ for 10 min;
s600: adding 15 parts of aqueous PU glue into softened water, stirring, adding ammonia water to adjust the pH value to 9, sending the mixture into a PU trough, and then placing the hand mold baked for the fourth time into the PU trough;
s700: and taking out the hand mold in the PU trough, putting the hand mold into an oven, baking for the fifth time at 220 ℃ for 15min, and sequentially rolling the hand mold subjected to the fifth baking to obtain the oil-resistant polyvinyl chloride gloves after demolding, inspecting and sorting.
In the embodiment, the carboxylated nitrile latex is an anionic high-molecular polymer emulsion, and the latex has uniform molecular weight and particle size distribution, oil resistance, solvent resistance and acid and alkali resistance, so that the prepared gloves have good oil resistance and acid and alkali resistance by adding the carboxylated nitrile latex, and the prepared gloves can be modified by adding dichloroethylene, tert-butyl acrylate, ethylene glycol dimethacrylate, diallyl maleate and polybutylene, so that the adhesion, film forming property and oil resistance of the gloves are improved, the quality and the performance of the prepared gloves are improved, wherein the antistatic agent can be added to improve the antistatic property of the gloves, and the modified carboxylated nitrile latex can be vulcanized by using a vulcanizing agent consisting of 9 parts of sulfur, 14 parts of zinc oxide, 4 parts of anti-aging agent, 5 parts of TMTD, 7 parts of titanium dioxide, 5 parts of 3% CMC, 6 parts of water, 7 parts of sulfur monochloride and 4 parts of benzoyl peroxide And (2) treating, heating and stirring to prepare a first colloid, and heating and mixing PVC resin powder, styrene butadiene rubber, epoxy fatty acid methyl ester, ATBC, an oil resistant agent and D80 to prepare a second colloid, wherein the PVC resin powder and the styrene butadiene rubber are heated and mixed to ensure that the prepared glove has good elasticity and stretching degree, and the glove quality is improved, wherein the styrene butadiene rubber is a polystyrene butadiene copolymer. The physical mechanism performance, the processing performance and the service performance of the product are close to those of natural rubber, some performances such as wear resistance, heat resistance, aging resistance and vulcanization speed are better than those of the natural rubber, and the oil resistance of the glove can be further improved by using an oil resistant agent consisting of polyoxyethylene-polyoxypropylene octyl ether caprylate, polyoxy alkylene ether, propyl palmitate, sodium alkyl sulfonate, dodecylamine polyoxypropylene monododecenyl succinate, sodium dodecyl sulfate and erucamide propyl betaine; after the first colloid and the second colloid are prepared, the first colloid and the second colloid are filtered by utilizing a stainless steel filter screen of 1100 meshes, large granular substances are filtered out, and the filtered first colloid and the filtered second colloid are subjected to vacuum defoaming, so that the prepared glove is more delicate in texture. Then immersing the preheated hand mold into a first colloid, taking out the preheated hand mold to drop, then immersing the hand mold into a methanol solution of calcium nitrate with the mass concentration of 4% in a solidification tank, then carrying out primary baking, then immersing the hand mold into a toluene solution of PUD with the mass concentration of 45%, carrying out secondary baking, immersing the hand mold after the secondary baking into a second colloid, then carrying out slurry spraying, putting the hand mold after slurry spraying into an oven to carry out tertiary baking, carrying out sand soaking after the tertiary baking is finished, then carrying out sand spraying, and putting the hand mold into the oven to carry out the tertiary baking after the sand spraying is finished; and then adding the water-based PU glue into softened water, stirring, adding ammonia water to adjust the pH value to 9, sending the mixture into a PU trough, placing the hand mold baked for the fourth time into the PU trough, taking out the hand mold in the PU trough, placing the hand mold into an oven to bake for the fifth time, and sequentially rolling the hand mold baked for the fifth time to form a lip, and demolding, inspecting and sorting the lip to obtain the oil-resistant polyvinyl chloride glove.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The oil-resistant polyvinyl chloride gloves are characterized by being prepared from the following raw materials in parts by mass:
80-100 parts of carboxylated nitrile latex, 15-25 parts of vulcanizing agent, 180-200 parts of PVC resin powder, 40-60 parts of plasticizer, 10-20 parts of stabilizer, 20-30 parts of oil resistant agent, 20-30 parts of rubber, 15-25 parts of viscosity reducer, 10-30 parts of coagulant, 10-30 parts of surface treating agent and 10-20 parts of aqueous PU adhesive.
2. The oil-resistant polyvinyl chloride gloves according to claim 1, wherein the process for preparing the oil-resistant polyvinyl chloride gloves comprises the following steps:
heating and mixing the carboxylated nitrile latex and a vulcanizing agent in parts by mass to prepare a first colloid;
heating and mixing PVC resin powder and rubber in parts by mass, sequentially adding a plasticizer, a stabilizer, an oil resistance agent and a viscosity reducer, and heating and mixing to obtain a second colloid;
preheating the hand mold, immersing the preheated hand mold into a first colloid, then immersing into a coagulant in a coagulation tank, then baking for the first time, then immersing into a surface treatment agent, and then baking for the second time;
immersing the hand mold after the second baking into a second colloid, then spraying slurry, putting the hand mold after slurry spraying into an oven for third baking, putting the hand mold into a sand material for sand leaching after the third baking is finished, then spraying sand, and putting the hand mold into the oven for fourth baking after sand spraying is finished;
adding the aqueous PU glue in parts by mass into softened water, stirring, adding ammonia water to adjust the pH value to 8-10, feeding the mixture into a PU trough, and placing the hand mold baked for the fourth time into the PU trough;
and taking out the hand mold in the PU trough, putting the hand mold into an oven for baking for the fifth time, and sequentially rolling the hand mold subjected to baking for the fifth time, demolding, inspecting and sorting to obtain the oil-resistant polyvinyl chloride glove.
3. The process for preparing oil-resistant polyvinyl chloride gloves according to claim 2, wherein in the step of preparing the first colloid by heating and mixing the carboxylated nitrile latex and the vulcanizing agent in parts by mass:
the carboxylic butyronitrile emulsion and the vulcanizing agent are stirred by a stirrer and heated by a heater, the stirring speed is 400-600 r/min, the heating temperature is 100-120 ℃, and the stirring and heating time is 20-30 min, wherein the vulcanizing agent consists of 8-10 parts of sulfur, 12-16 parts of zinc oxide, 3-5 parts of an anti-aging agent, 4-6 parts of TMTD, 6-8 parts of titanium dioxide, 4-6 parts of 3% CMC, 5-7 parts of water, 6-8 parts of sulfur monochloride and 3-5 parts of benzoyl peroxide.
4. The process for preparing oil-resistant polyvinyl chloride gloves according to claim 2, wherein in the step of heating and mixing the PVC resin powder and the rubber in parts by mass, and sequentially adding the plasticizer, the stabilizer, the oil-resistant agent and the viscosity reducer for heating and mixing to prepare the second colloid:
the PVC resin powder and the rubber are heated and mixed by a stirrer and a heater, wherein the stirring speed is 500-700 r/min, the heating temperature is 130-160 ℃, and the stirring and heating time is 15-25 min;
in the heating and mixing process of sequentially adding the plasticizer, the stabilizer, the oil resistance agent and the viscosity reducer, the stirring speed is 600-800 r/min, the heating temperature is 150-170 ℃, and the stirring and heating time is 10-20 min;
the plasticizer is one or more of epoxy fatty acid methyl ester, DINCH, DBE and TXIB;
the stabilizer is one or more of ATBC, CZ-F990 and zinc stearate;
the viscosity reducer is D70 or D80.
5. The process for making oil resistant polyvinyl chloride gloves of claim 4,
the oil proofing agent consists of polyoxyethylene-polyoxypropylene octyl ether caprylate, polyoxy alkylene ether, propyl palmitate, sodium alkyl sulfonate, dodecylamine polyoxypropylene monododecenyl succinate, sodium dodecyl sulfate and erucamide propyl betaine.
6. The process for preparing oil-resistant polyvinyl chloride gloves according to claim 2,
before preheating the hand mold, filtering the first colloid and the second colloid by using a 1000-1200 mesh filter screen, defoaming the filtered first colloid and the filtered second colloid for 5-7 times in vacuum, keeping the first colloid and the filtered second colloid at a negative pressure of-0.1-0.9 MP for 5-10 min/time, and preheating for 1-2 h.
7. The process for preparing oil-resistant polyvinyl chloride gloves according to claim 6, wherein in the steps of preheating the hand mold, immersing the preheated hand mold in the first colloid, then in the coagulant in the coagulation bath, then performing the first drying, then immersing in the surface treatment agent, and then performing the second drying:
preheating the hand mold at the temperature of 50-70 ℃, dipping the preheated hand mold into a first colloid, dripping for 2-3 min, dipping into a coagulant in a coagulation tank, performing first baking at the temperature of 100-120 ℃ for 8-10 min, dipping into a surface treating agent after the first baking is completed, and performing second baking at the temperature of 110-130 ℃ for 4-6 min;
wherein the coagulant is a methanol solution of calcium nitrate with the mass concentration of 3-6%, and the surface treating agent is a toluene solution of PUD with the mass concentration of 40-50%.
8. The process for preparing the oil-resistant polyvinyl chloride gloves according to claim 7, wherein the step of immersing the hand mold after the second baking into the second colloid, then pouring the slurry, putting the hand mold after the slurry pouring into an oven for the third baking, putting the hand mold into a sand material for sand dipping after the third baking is finished, then pouring the sand, and putting the hand mold into the oven for the fourth baking after the sand pouring is finished is that:
the slurry pouring time is 2-4 min, the third baking temperature is 150-160 ℃, the time is 5-7 min, the viscosity of the sand material is 700-900 Pa.s, the sand leaching time is 4-8 min, the sand pouring time is 3-5 min, the fourth baking temperature is 180-200 ℃, and the time is 8-12 min.
9. The process for preparing the oil-resistant polyvinyl chloride gloves according to claim 8, wherein in the step of taking out the hand mold in the PU trough, putting the hand mold into an oven for fifth baking, and sequentially carrying out lip rolling, demolding, inspecting and sorting on the hand mold after the fifth baking to obtain the oil-resistant polyvinyl chloride gloves:
the fifth baking temperature is 200-240 ℃, and the time is 10-20 min.
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