Puncture-proof wear-resistant medical gloves and preparation process thereof

Abstract

The invention relates to the technical field of medical gloves, in particular to a puncture-proof wear-resistant medical glove and a preparation process thereof. The invention discloses a preparation process of stab-resistant and wear-resistant medical gloves, which comprises the following steps: firstly, by taking vanillin and bromopropene as raw materials, carrying out allylation modification on the vanillin to obtain allylated vanillin, carrying out hydrosilylation reaction on the allylated vanillin and 1, 1, 3, 3-tetramethyldisiloxane, and then carrying out Schiff base reaction with ethanolamine to synthesize silicon-containing dihydric alcohol; the preparation method comprises the following steps: carrying out a reaction on silicon-containing dihydric alcohol, polytetrahydrofuran ether glycol and toluene diisocynate to obtain a polyurethane emulsion; mixing the polyurethane emulsion, a foaming agent, a stabilizing agent, color paste and a water-based thickening agent according to a specific proportion, and preparing polyurethane foaming slurry by a mechanical foaming method; sleeving a mold with the nylon glove core, sequentially soaking the nylon glove core in the solidification liquid, the polyurethane foaming slurry and the surface treatment liquid, baking, washing with water, and demolding to obtain a finished product, namely the puncture-proof and wear-resistant medical glove.

Description

Technical Field

[0001] This invention relates to the field of medical glove technology, specifically to a puncture-resistant and abrasion-resistant medical glove and its manufacturing process. Background Technology

[0002] Currently, in the medical and health field, commonly used traditional gloves include natural rubber gloves, polyvinyl chloride gloves, nitrile gloves, and polyethylene gloves. Among them, nitrile gloves have the best overall performance and are the most commonly used, but they have drawbacks such as a stiff feel, poor elasticity, low strength, and susceptibility to tearing, which limits their use. Compared with nitrile gloves, polyurethane-impregnated gloves have better abrasion resistance, higher elasticity, a softer feel, and excellent comfort.

[0003] However, traditional oil-based polyurethane-impregnated gloves require the use of organic solvents in their manufacturing process, which are highly toxic and can harm the human body. Water-based polyurethane-impregnated gloves, on the other hand, suffer from poor abrasion resistance and antibacterial properties, limiting their application in the medical glove field. Therefore, it is essential to invent a puncture-resistant and abrasion-resistant medical glove. Summary of the Invention

[0004] The purpose of this invention is to provide a puncture-resistant and abrasion-resistant medical glove and its manufacturing process, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a puncture-resistant and abrasion-resistant medical glove and its manufacturing process, comprising the following steps:

[0006] Step 1:

[0007] A polyurethane foam slurry is prepared by mixing polyurethane emulsion, foaming agent, stabilizer, color paste, and water-based thickener and then mechanically foaming it.

[0008] Step 2:

[0009] The nylon glove core is placed on the mold and then immersed in the coagulation liquid for 1-2 seconds, the polyurethane foam slurry for 1-2 seconds, and the surface treatment liquid for 1-2 seconds. After being removed, it is left to stand for 5-10 minutes and then baked at a temperature of 70-100℃ for 1-1.5 hours. After washing with water, it is dried, cooled, and demolded to obtain puncture-resistant and abrasion-resistant medical gloves.

[0010] Further, in step 1, the content of each component in the polyurethane foam slurry, by weight, is 90-95 parts polyurethane emulsion, 1-3 parts foaming agent, 1-3 parts stabilizer, 0.1-0.3 parts color paste, and 1-2 parts water-based thickener.

[0011] Furthermore, in step 1, the method for preparing the polyurethane emulsion includes the following steps:

[0012] S1: Vanillin was dispersed in anhydrous ethanol, heated to 40-50℃, anhydrous potassium carbonate was added, stirred for 10-15 min, bromopropene was added, heated to 70-80℃ and refluxed for 40-48 h, filtered, rotary evaporated, extracted and dried to obtain allyl vanillin.

[0013] S2: Allyl vanillin is dispersed in tetrahydrofuran and heated to 60-70°C. Using isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane is added under argon atmosphere. After reacting at this temperature for 8-10 hours, ethanolamine is added. The mixture is then refluxed under nitrogen atmosphere for 3-5 hours. After removing the solvent by rotary evaporation, the mixture is washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol.

[0014] S3: Mix the silicon-containing diol and polytetrahydrofuran ether diol 2000, and dehydrate them at 100-120℃ to obtain a composite diol; using dibutyltin dilaurate as a catalyst, react the dehydrated composite diol and toluene diisocyanate at 70-80℃ under nitrogen protection for 2-3 hours, cool to 40-50℃, add the chain extender 1,4-butanediol, and heat to 60-80℃ for 1-2 hours for chain extension reaction, and emulsify with water to obtain a polyurethane emulsion.

[0015] Furthermore, in S1, vanillin, anhydrous potassium carbonate, and bromopropene react in a weight ratio of (7.7–8):(14–15):(7–8).

[0016] Furthermore, in S2, allyl vanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine react in a molar ratio of 2:1:2.

[0017] Furthermore, in S3, the molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated composite diol, and the hydroxyl group of the chain extender is (2-3):1:(1-2).

[0018] Furthermore, in S3, the weight ratio of the composite diol containing silicon diol and polytetrahydrofuran ether diol 2000 is 1:(3-4).

[0019] Furthermore, in S3, the solid content of the polyurethane emulsion is 45-50%.

[0020] Furthermore, in step 2, the content of each component in the coagulation liquid, by weight percentage, is 1-5% calcium nitrate and 95-99% methanol; the content of each component in the surface treatment liquid, by weight percentage, is 2-5% calcium chloride and 95-98% hydrochloric acid.

[0021] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention provides a manufacturing process for puncture-resistant and abrasion-resistant medical gloves. This invention mixes polyurethane emulsion, foaming agent, stabilizer, colorant, and water-based thickener in a specific ratio, and prepares a polyurethane foaming slurry using a mechanical foaming method; a nylon glove core is placed on a mold and sequentially immersed in a coagulation liquid, a polyurethane foaming slurry, and a surface treatment liquid; after baking, washing, and demolding, the finished puncture-resistant and abrasion-resistant medical gloves are obtained.

[0022] In preparing the polyurethane emulsion, this invention first uses vanillin and bromopropylene as raw materials to allylate vanillin, introducing unsaturated carbon-carbon double bonds to obtain allylvanillin. Allylvanillin and 1,1,3,3-tetramethyldisiloxane are then grafted via a hydrosilylation reaction, followed by a Schiff base reaction with ethanolamine to introduce hydroxyl groups, thereby obtaining a silicon-containing diol. In the above reaction, the molar ratio of the reactants allylvanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine is 2:1:2. The silicon-containing diol is mixed with polytetrahydrofuran ether diol as a soft segment and reacted with toluene diisocyanate to introduce organosilicon into the polyurethane. Organosilicon has a low surface energy, making the polyurethane surface smoother and flatter, greatly reducing the coefficient of friction of the material, avoiding severe wear due to frequent friction during use, and improving the wear resistance of the gloves. In silicon-containing diols, the presence of flexible Si-O-Si segments increases the toughness of polyurethane materials to a certain extent, effectively enhancing the flexibility and elongation of the polyurethane molecular chains. Puncture resistance largely depends on the material's impact resistance and toughness. Therefore, the polyurethane prepared in this invention can effectively disperse local stress and reduce the possibility of breakage when punctured by sharp objects (such as nails or punctures). By using silicon-containing diols as soft segments, the polyurethane molecular chains become more flexible, thus improving the primary puncture resistance.

[0023] Furthermore, during the synthesis of silicon-containing diols, allylated vanillin reacts with ethanolamine to generate Schiff base compounds. Schiff base compounds themselves possess excellent antibacterial properties, and since the raw material contains vanillin, which also has antibacterial effects, the two can produce a synergistic effect. Therefore, silicon-containing diols exhibit good antibacterial activity. Introducing silicon-containing diols and polytetrahydrofuran ether diols as a soft segment into polyurethane can impart high antibacterial properties to gloves, thus meeting their requirements for use in the medical and health fields. However, it should be noted that excessive amounts of silicon-containing diols can lead to a decrease in the mechanical properties of the polyurethane. Therefore, the optimal performance of medical gloves prepared by mixing silicon-containing diols and polytetrahydrofuran ether diol 2000 at a weight ratio of 1:(3-4) yields the best results. Detailed Implementation

[0024] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Materials and sources used in this invention: foaming agent is trichlorofluoromethane, stabilizer is sodium dodecyl sulfate, water-based thickener is carboxymethyl cellulose; color paste is from Yingde Kedi Pigment Technology Co., Ltd., model B6153; nylon glove core is from Linyi Yipin Labor Protection Products Co., Ltd., model STX-001.

[0026] Example 1: A puncture-resistant and abrasion-resistant medical glove and its manufacturing process, comprising the following steps:

[0027] Step 1:

[0028] S11: Disperse 8 kg of vanillin in anhydrous ethanol, heat to 40 °C, add 14 kg of anhydrous potassium carbonate, stir for 10 min, add 8 kg of bromopropene, heat to 70 °C and reflux for 40 h, filter, rotary evaporate, extract and dry to obtain allyl vanillin.

[0029] S12: Allyl vanillin was dispersed in tetrahydrofuran and heated to 60°C. Using an isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane was added under argon atmosphere. After reacting at this temperature for 8 hours, ethanolamine was added. The mixture was then refluxed under nitrogen atmosphere for 3 hours. After removing the solvent by rotary evaporation, the mixture was washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol. The allyl vanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine reacted in a molar ratio of 2:1:2.

[0030] S13: A silicon-containing diol and polytetrahydrofuran ether diol 2000 are mixed at a weight ratio of 1:4 and dehydrated at 100°C to obtain a composite diol. Using dibutyltin dilaurate as a catalyst, the dehydrated composite diol and toluene diisocyanate are reacted at 70°C under nitrogen protection for 2 hours. The temperature is then lowered to 40°C, and 1,4-butanediol, a chain extender, is added. The temperature is then raised to 60°C for a chain extension reaction for 1 hour. The mixture is then emulsified with water to obtain a polyurethane emulsion with a solid content of 50%. The molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated composite diol, and the hydroxyl group of the chain extender is 2.5:1:1.5.

[0031] Step 2:

[0032] S21: Mix 90kg of polyurethane emulsion, 1kg of foaming agent, 2kg of stabilizer, 0.2kg of color paste, and 1.5kg of water-based thickener, and prepare polyurethane foam slurry by mechanical foaming;

[0033] S22: Place the nylon glove core onto the mold, immerse it sequentially in the coagulation liquid for 1 second, in the polyurethane foam slurry for 1 second, and in the surface treatment liquid for 1 second. After removal, place it for 5 minutes, bake it at 70℃ for 1 hour, wash it with water, dry it, cool it and demold it to obtain puncture-resistant and abrasion-resistant medical gloves. The coagulation liquid contains, by weight percentage, 5% calcium nitrate and 95% methanol. The surface treatment liquid contains, by weight percentage, 5% calcium chloride and 95% hydrochloric acid.

[0034] Example 2: A puncture-resistant and abrasion-resistant medical glove and its manufacturing process, comprising the following steps:

[0035] Step 1:

[0036] S11: Disperse 8 kg of vanillin in anhydrous ethanol, heat to 45 °C, add 14 kg of anhydrous potassium carbonate, stir for 12 min, add 8 kg of bromopropene, heat to 75 °C and reflux for 44 h, filter, rotary evaporate, extract and dry to obtain allyl vanillin.

[0037] S12: Allyl vanillin was dispersed in tetrahydrofuran and heated to 65°C. Using an isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane was added under argon atmosphere. After reacting at this temperature for 9 hours, ethanolamine was added. The mixture was then refluxed under nitrogen atmosphere for 4 hours. After removing the solvent by rotary evaporation, the mixture was washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol. Allyl vanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine reacted in a molar ratio of 2:1:2.

[0038] S13: A silicon-containing diol and polytetrahydrofuran ether diol 2000 are mixed at a weight ratio of 1:3.5 and dehydrated at 100°C to obtain a composite diol. Using dibutyltin dilaurate as a catalyst, the dehydrated composite diol and toluene diisocyanate are reacted at 75°C under nitrogen protection for 2.5 hours. The mixture is then cooled to 45°C, and 1,4-butanediol, a chain extender, is added. The mixture is heated to 70°C for a chain extension reaction of 1.5 hours. The mixture is then emulsified with water to obtain a polyurethane emulsion with a solid content of 50%. The molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated composite diol, and the hydroxyl group of the chain extender is 2.5:1:1.5.

[0039] Step 2:

[0040] S21: Mix 90kg of polyurethane emulsion, 1kg of foaming agent, 2kg of stabilizer, 0.2kg of color paste, and 1.5kg of water-based thickener, and prepare polyurethane foam slurry by mechanical foaming;

[0041] S22: Place the nylon glove core onto the mold, immerse it sequentially in the coagulation liquid for 2 seconds, in the polyurethane foam slurry for 2 seconds, and in the surface treatment liquid for 2 seconds. After removal, let it stand for 8 minutes, bake it at 85℃ for 1 hour, wash it with water, dry it, cool it and demold it to obtain puncture-resistant and abrasion-resistant medical gloves. The coagulation liquid contains, by weight percentage, 5% calcium nitrate and 95% methanol; the surface treatment liquid contains, by weight percentage, 5% calcium chloride and 95% hydrochloric acid.

[0042] Example 3: A puncture-resistant and abrasion-resistant medical glove and its manufacturing process, comprising the following steps:

[0043] Step 1:

[0044] S11: Disperse 8 kg of vanillin in anhydrous ethanol, heat to 50 °C, add 14 kg of anhydrous potassium carbonate, stir for 15 min, add 8 kg of bromopropene, heat to 80 °C and reflux for 48 h, filter, rotary evaporate, extract and dry to obtain allyl vanillin.

[0045] S12: Allyl vanillin was dispersed in tetrahydrofuran and heated to 70°C. Using an isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane was added under argon atmosphere. After reacting at this temperature for 10 hours, ethanolamine was added. The mixture was then refluxed under nitrogen atmosphere for 5 hours. After removing the solvent by rotary evaporation, the mixture was washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol. Allyl vanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine reacted in a molar ratio of 2:1:2.

[0046] S13: A silicon-containing diol and polytetrahydrofuran ether diol 2000 are mixed at a weight ratio of 1:3 and dehydrated at 100°C to obtain a composite diol. Using dibutyltin dilaurate as a catalyst, the dehydrated composite diol and toluene diisocyanate are reacted at 80°C under nitrogen protection for 3 hours. The mixture is then cooled to 50°C, and 1,4-butanediol, a chain extender, is added. The mixture is then heated to 80°C for a chain extension reaction for 2 hours. Water is added for emulsification to obtain a polyurethane emulsion with a solid content of 50%. The molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated composite diol, and the hydroxyl group of the chain extender is 2.5:1:1.5.

[0047] Step 2:

[0048] S21: Mix 90kg of polyurethane emulsion, 1kg of foaming agent, 2kg of stabilizer, 0.2kg of color paste, and 1.5kg of water-based thickener, and prepare polyurethane foam slurry by mechanical foaming;

[0049] S22: Place the nylon glove core onto the mold, immerse it sequentially in the coagulation liquid for 2 seconds, in the polyurethane foam slurry for 2 seconds, and in the surface treatment liquid for 2 seconds. After removal, let it stand for 10 minutes, bake it at 100℃ for 1.5 hours, wash it with water, dry it, cool it and demold it to obtain puncture-resistant and abrasion-resistant medical gloves. The coagulation liquid contains, by weight percentage, 5% calcium nitrate and 95% methanol; the surface treatment liquid contains, by weight percentage, 5% calcium chloride and 95% hydrochloric acid.

[0050] Example 4: A puncture-resistant and abrasion-resistant medical glove and its manufacturing process, comprising the following steps:

[0051] Step 1:

[0052] S11: Disperse 8 kg of vanillin in anhydrous ethanol, heat to 45 °C, add 14 kg of anhydrous potassium carbonate, stir for 12 min, add 8 kg of bromopropene, heat to 75 °C and reflux for 44 h, filter, rotary evaporate, extract and dry to obtain allyl vanillin.

[0053] S12: Allyl vanillin was dispersed in tetrahydrofuran and heated to 65°C. Using an isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane was added under argon atmosphere. After reacting at this temperature for 9 hours, ethanolamine was added. The mixture was then refluxed under nitrogen atmosphere for 4 hours. After removing the solvent by rotary evaporation, the mixture was washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol. Allyl vanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine reacted in a molar ratio of 2:1:2.

[0054] S13: A silicon-containing diol and polytetrahydrofuran ether diol 2000 are mixed at a weight ratio of 1:3.5 and dehydrated at 100°C to obtain a composite diol. Using dibutyltin dilaurate as a catalyst, the dehydrated composite diol and toluene diisocyanate are reacted at 75°C under nitrogen protection for 2.5 hours. The mixture is then cooled to 45°C, and 1,4-butanediol, a chain extender, is added. The mixture is heated to 70°C for a chain extension reaction of 1.5 hours. The mixture is then emulsified with water to obtain a polyurethane emulsion with a solid content of 50%. The molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated composite diol, and the hydroxyl group of the chain extender is 2.5:1:1.5.

[0055] Step 2:

[0056] S21: Mix 90kg of polyurethane emulsion, 1kg of foaming agent, 2kg of stabilizer, 0.2kg of color paste, and 1.5kg of water-based thickener, and prepare polyurethane foam slurry by mechanical foaming;

[0057] S22: Place the nylon glove core onto the mold, immerse it sequentially in the coagulation liquid for 1 second, in the polyurethane foam slurry for 2 seconds, and in the surface treatment liquid for 1 second. After removal, place it for 8 minutes, bake it at 85℃ for 1 hour, wash it with water, dry it, cool it and demold it to obtain puncture-resistant and abrasion-resistant medical gloves. The coagulation liquid contains, by weight percentage, 3% calcium nitrate and 97% methanol; the surface treatment liquid contains, by weight percentage, 5% calcium chloride and 95% hydrochloric acid.

[0058] Comparative Example 1: No silicon-containing diol was added, and the other parameters were the same as in Example 1.

[0059] Step 1:

[0060] Polytetrahydrofuran ether glycol 2000 was dehydrated at 100°C. Using dibutyltin dilaurate as a catalyst, the dehydrated polytetrahydrofuran ether glycol 2000 and toluene diisocyanate were reacted at 70°C under nitrogen protection for 2 hours. The mixture was then cooled to 40°C, and 1,4-butanediol, a chain extender, was added. The reaction was then heated to 60°C for 1 hour to extend the chain. Water was added for emulsification to obtain a polyurethane emulsion with a solid content of 50%. The molar ratio of the isocyanate groups of toluene diisocyanate, the hydroxyl groups of polytetrahydrofuran ether glycol 2000, and the hydroxyl groups of the chain extender was 2.5:1:1.5.

[0061] Step 2:

[0062] S21: Mix 90kg of polyurethane emulsion, 1kg of foaming agent, 2kg of stabilizer, 0.2kg of color paste, and 1.5kg of water-based thickener, and prepare polyurethane foam slurry by mechanical foaming;

[0063] S22: Place the nylon glove core onto the mold, immerse it sequentially in the coagulation liquid for 1 second, in the polyurethane foam slurry for 1 second, and in the surface treatment liquid for 1 second. After removal, place it for 5 minutes, bake it at 70℃ for 1 hour, wash it with water, dry it, cool it and demold it to obtain puncture-resistant and abrasion-resistant medical gloves. The coagulation liquid contains, by weight percentage, 5% calcium nitrate and 95% methanol. The surface treatment liquid contains, by weight percentage, 5% calcium chloride and 95% hydrochloric acid.

[0064] Comparative Example 2: Silicon-containing diols were prepared by using acrolein instead of vanillin, with the remaining parameters being the same as in Example 2.

[0065] Step 1:

[0066] S11: Acrolein was dispersed in tetrahydrofuran and heated to 50°C. Using an isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane was added under argon atmosphere. After reacting at this temperature for 9 hours, ethanolamine was added. The mixture was then refluxed under nitrogen atmosphere for 4 hours. After removing the solvent by rotary evaporation, the mixture was washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol. The reaction was carried out in a molar ratio of 2:1:2 for acrolein, 1,1,3,3-tetramethyldisiloxane, and ethanolamine.

[0067] S12: A silicon-containing diol and polytetrahydrofuran ether diol 2000 are mixed at a weight ratio of 1:3.5 and dehydrated at 100°C to obtain a composite diol. Using dibutyltin dilaurate as a catalyst, the dehydrated composite diol and toluene diisocyanate are reacted at 75°C under nitrogen protection for 2.5 hours. The mixture is then cooled to 45°C, and 1,4-butanediol, a chain extender, is added. The mixture is heated to 70°C for a chain extension reaction of 1.5 hours. The mixture is then emulsified with water to obtain a polyurethane emulsion with a solid content of 50%. The molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated composite diol, and the hydroxyl group of the chain extender is 2.5:1:1.5.

[0068] Step 2:

[0069] S21: Mix 90kg of polyurethane emulsion, 1kg of foaming agent, 2kg of stabilizer, 0.2kg of color paste, and 1.5kg of water-based thickener, and prepare polyurethane foam slurry by mechanical foaming;

[0070] S22: Place the nylon glove core onto the mold, immerse it sequentially in the coagulation liquid for 2 seconds, in the polyurethane foam slurry for 2 seconds, and in the surface treatment liquid for 2 seconds. After removal, let it stand for 8 minutes, bake it at 85℃ for 1 hour, wash it with water, dry it, cool it and demold it to obtain puncture-resistant and abrasion-resistant medical gloves. The coagulation liquid contains, by weight percentage, 5% calcium nitrate and 95% methanol; the surface treatment liquid contains, by weight percentage, 5% calcium chloride and 95% hydrochloric acid.

[0071] Comparative Example 3: The content of silicon-containing diol in the composite diol was increased, and the other parameters were the same as in Example 3.

[0072] Step 1:

[0073] S11: Disperse 8 kg of vanillin in anhydrous ethanol, heat to 50 °C, add 14 kg of anhydrous potassium carbonate, stir for 15 min, add 8 kg of bromopropene, heat to 80 °C and reflux for 48 h, filter, rotary evaporate, extract and dry to obtain allyl vanillin.

[0074] S12: Allyl vanillin was dispersed in tetrahydrofuran and heated to 70°C. Using an isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane was added under argon atmosphere. After reacting at this temperature for 10 hours, ethanolamine was added. The mixture was then refluxed under nitrogen atmosphere for 5 hours. After removing the solvent by rotary evaporation, the mixture was washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol. Allyl vanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine reacted in a molar ratio of 2:1:2.

[0075] S13: A silicon-containing diol and polytetrahydrofuran ether diol 2000 are mixed in a weight ratio of 1:1 and dehydrated at 100°C to obtain a composite diol. Using dibutyltin dilaurate as a catalyst, the dehydrated composite diol and toluene diisocyanate are reacted at 80°C under nitrogen protection for 3 hours. The temperature is then lowered to 50°C, and 1,4-butanediol, a chain extender, is added. The temperature is then raised to 80°C for a chain extension reaction for 2 hours. The mixture is then emulsified with water to obtain a polyurethane emulsion with a solid content of 50%. The molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated composite diol, and the hydroxyl group of the chain extender is 2.5:1:1.5.

[0076] Step 2:

[0077] S21: Mix 90kg of polyurethane emulsion, 1kg of foaming agent, 2kg of stabilizer, 0.2kg of color paste, and 1.5kg of water-based thickener, and prepare polyurethane foam slurry by mechanical foaming;

[0078] S22: Place the nylon glove core onto the mold, immerse it sequentially in the coagulation liquid for 2 seconds, in the polyurethane foam slurry for 2 seconds, and in the surface treatment liquid for 2 seconds. After removal, let it stand for 10 minutes, bake it at 100℃ for 1.5 hours, wash it with water, dry it, cool it and demold it to obtain puncture-resistant and abrasion-resistant medical gloves. The coagulation liquid contains, by weight percentage, 5% calcium nitrate and 95% methanol; the surface treatment liquid contains, by weight percentage, 5% calcium chloride and 95% hydrochloric acid.

[0079] Experiment: The puncture-resistant and abrasion-resistant medical gloves prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to performance tests. Abrasion resistance and puncture resistance were tested according to the EU standard EN388; antibacterial performance was tested according to HG / T4301-2012, with Staphylococcus aureus as the selected bacterial strain.

[0080] The experimental results are shown in Table 1 below.

[0081] Table 1: Test results of various performance characteristics of a puncture-resistant and abrasion-resistant medical glove

[0082] project Puncture resistance rating Abrasion resistance rating Antibacterial rate Example 1 3 4 97.6％ Example 2 3 4 98.2％ Example 3 3 4 98.5％ Example 4 3 4 98.3％ Comparative Example 1 2 2 78.8％ Comparative Example 2 2 3 90.4％ Comparative Example 3 2 2 98.5％

[0083] Conclusions: Data from Examples 1-4 show that the medical gloves prepared by this invention have good performance. Data from Example 1 and Comparative Example 1 show that the prepared medical gloves have good abrasion resistance, puncture resistance, and antibacterial properties when no silicon-containing diol is added. Data from Example 2 and Comparative Example 2 show that when acrolein is used instead of vanillin, the puncture resistance, antibacterial properties, and abrasion resistance of the prepared medical gloves decrease. Data from Example 3 and Comparative Example 3 show that increasing the amount of silicon-containing diol decreases the puncture resistance, antibacterial properties, and abrasion resistance of the prepared medical gloves.

[0084] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manufacturing process for a puncture-resistant and abrasion-resistant medical glove, characterized in that: Includes the following steps: Step 1: A polyurethane foam slurry is prepared by mixing polyurethane emulsion, foaming agent, stabilizer, color paste, and water-based thickener and then mechanically foaming it. Step 2: The nylon glove core is placed on the mold and then immersed in the coagulation liquid for 1-2 seconds, the polyurethane foam slurry for 1-2 seconds, and the surface treatment liquid for 1-2 seconds. After being removed, it is left to stand for 5-10 minutes and then baked at a temperature of 70-100℃ for 1-1.5 hours. After washing with water, it is dried, cooled, and demolded to obtain puncture-resistant and abrasion-resistant medical gloves.

2. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 1, characterized in that: In step 1, the content of each component in the polyurethane foam slurry, by weight, is 90-95 parts polyurethane emulsion, 1-3 parts foaming agent, 1-3 parts stabilizer, 0.1-0.3 parts color paste, and 1-2 parts water-based thickener.

3. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 1, characterized in that: Step 1, the method for preparing the polyurethane emulsion, includes the following steps: S1: Vanillin was dispersed in anhydrous ethanol, heated to 40-50℃, anhydrous potassium carbonate was added, stirred for 10-15 min, bromopropene was added, heated to 70-80℃ and refluxed for 40-48 h, filtered, rotary evaporated, extracted and dried to obtain allyl vanillin. S2: Allyl vanillin is dispersed in tetrahydrofuran and heated to 60-70°C. Using isopropanol solution of chloroplatinic acid as a catalyst, 1,1,3,3-tetramethyldisiloxane is added under argon atmosphere. After reacting at this temperature for 8-10 hours, ethanolamine is added. The mixture is then refluxed under nitrogen atmosphere for 3-5 hours. After removing the solvent by rotary evaporation, the mixture is washed with cold anhydrous ethanol and dried under vacuum to obtain a silicon-containing diol. S3: Mix the silicon-containing diol and polytetrahydrofuran ether diol 2000, and dehydrate them at 100-120℃ to obtain a composite diol; using dibutyltin dilaurate as a catalyst, react the dehydrated composite diol and toluene diisocyanate at 70-80℃ under nitrogen protection for 2-3 hours, cool to 40-50℃, add the chain extender 1,4-butanediol, and heat to 60-80℃ for 1-2 hours for chain extension reaction, and emulsify with water to obtain a polyurethane emulsion.

4. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 3, characterized in that: In S1, vanillin, anhydrous potassium carbonate, and bromopropene react in a weight ratio of (7.7–8):(14–15):(7–8).

5. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 3, characterized in that: In S2, allyl vanillin, 1,1,3,3-tetramethyldisiloxane, and ethanolamine react in a molar ratio of 2:1:

2.

6. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 1, characterized in that: In S3, the molar ratio of the isocyanate group of toluene diisocyanate, the hydroxyl group of the dehydrated complex diol, and the hydroxyl group of the chain extender is (2-3):1:(1-2).

7. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 1, characterized in that: In S3, the weight ratio of the composite diol containing silicon diol and polytetrahydrofuran ether diol 2000 is 1:(3-4).

8. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 1, characterized in that: In S3, the solid content of the polyurethane emulsion is 45-50%.

9. The manufacturing process of a puncture-resistant and abrasion-resistant medical glove according to claim 1, characterized in that: In step 2, the content of each component in the coagulation liquid, by weight percentage, is 1-5% calcium nitrate and 95-99% methanol; the content of each component in the surface treatment liquid, by weight percentage, is 2-5% calcium chloride and 95-98% hydrochloric acid.

10. The puncture-resistant and abrasion-resistant medical gloves prepared by the method according to any one of claims 1 to 9.