Pearlescent high-elasticity PVC glove and preparation method thereof

Abstract

The invention relates to the technical field of PVC gloves, in particular to a pearlescent high-elasticity PVC glove and a preparation method thereof.The glove surface layer is prepared from, by weight, 100 parts of PVC resin emulsion, 35-60 parts of epoxidized soybean oil, 8-20 parts of pearl powder, 5-35 parts of TXIB, 0.8-2 parts of elastomer, 0.8-1 part of calcium-zinc stabilizer, 0.15-0.2 part of polyurethane, 120-190 parts of pure water and 3-8 parts of fluorosilicone modified nano SiO2; the middle layer is prepared from the following raw materials in parts by weight: 30 to 50 parts of elastomer, 160 to 270 parts of tetrahydrofuran, 10 to 20 parts of epoxidized soybean oil, 5 to 10 parts of lipoic acid, 2 to 5 parts of zinc oxide nanowire and 0.2 to 0.7 part of calcium-zinc stabilizer; the inner layer is prepared from the following raw materials in parts by weight: 1 to 3 parts of nano-silver / ZnO heterojunction, 0.2 to 0.4 part of calcium-zinc stabilizer, 20 to 40 parts of polyurethane hydrogel and 10 to 20 parts of epoxidized soybean oil. The glove provided by the invention has higher strength and rebound resilience, and also has antibacterial performance.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC gloves, and particularly relates to a pearlescent highly elastic PVC glove and a preparation method thereof. Background Art

[0002] With the improvement of people's living standards and the change of aesthetic concepts, the appearance and personalization requirements for daily necessities are also increasing day by day. As an important member of disposable gloves, PVC gloves have become one of the commonly used protective articles in the fields of medical and health, food processing, and laboratories due to their advantages such as low cost, good chemical resistance, and good protection. With the development of the market, the production process of PVC gloves has been continuously improved, and the quality stability and environmental protection have been significantly improved. However, affected by the performance of PVC materials themselves, compared with nitrile and latex gloves, PVC gloves usually have poor flexibility and comfort, which to a certain extent limits their application and development.

[0003] Moreover, traditional PVC gloves are relatively single in color and appearance, and can no longer meet consumers' pursuit of fashion and uniqueness. Summary of the Invention

[0004] In order to solve the defects in the prior art, the present invention provides a pearlescent highly elastic PVC glove and a preparation method thereof, which are specifically realized through the following technical solutions: A pearlescent highly elastic PVC glove includes a surface layer, an intermediate layer, and an inner layer. The surface layer, by weight, includes the following raw materials: 100 parts of PVC resin emulsion, 35 - 60 parts of epoxidized soybean oil, 8 - 20 parts of pearlescent powder, 5 - 35 parts of TXIB, 0.8 - 2 parts of elastomer, 0.8 - 1 part of calcium zinc stabilizer, 0.15 - 0.2 part of polyurethane, 120 - 190 parts of pure water, and 3 - 8 parts of fluorosilicon-modified nano-SiO2; The intermediate layer, by weight, includes the following raw materials: 30 - 50 parts of elastomer, 160 - 270 parts of tetrahydrofuran, 10 - 20 parts of epoxidized soybean oil, 5 - 10 parts of lipoic acid, 2 - 5 parts of zinc oxide nanowires, and 0.2 - 0.7 part of calcium zinc stabilizer; The inner layer, by weight, includes the following raw materials: 1 - 3 parts of nano-silver / ZnO heterojunction, 0.2 - 0.4 part of calcium zinc stabilizer, 20 - 40 parts of polyurethane hydrogel, and 10 - 20 parts of epoxidized soybean oil.

[0005] The surface layer, by weight, includes the following raw materials: 100 parts of PVC resin emulsion, 45 parts of epoxidized soybean oil, 10 parts of pearlescent powder, 25 parts of TXIB, 2 parts of elastomer, 1 part of calcium zinc stabilizer, 0.152 part of polyurethane, 150 parts of pure water, and 5 parts of fluorosilicon-modified nano-SiO2; The middle layer, by weight, comprises the following raw materials: 45 parts of elastomer, 255 parts of tetrahydrofuran, 15 parts of epoxidized soybean oil, 9 parts of lipoic acid, 4.5 parts of zinc oxide nanowires, and 0.6 part of calcium zinc stabilizer; The inner layer, by weight, comprises the following raw materials: 2.5 parts of nano silver / ZnO heterojunction, 0.3 part of calcium zinc stabilizer, 35 parts of polyurethane hydrogel, and 15 parts of epoxidized soybean oil.

[0006] The elastomer is hydrogenated nitrile rubber.

[0007] A preparation method of the pearlescent highly elastic PVC glove comprises the following steps: Prepare the surface layer emulsion, weigh each raw material of the surface layer according to the formula, stir evenly, then ball-mill and disperse to a particle size ≤ 100 nm, and let stand to defoam for standby; Prepare the middle layer emulsion, weigh each raw material of the middle layer according to the formula, dissolve the elastomer hydrogenated nitrile rubber (HNBR) in tetrahydrofuran, then add epoxidized soybean oil, and stir evenly; then add lipoic acid, zinc oxide nanowires, and calcium zinc stabilizer to the nitrile rubber solution, stir evenly, perform ultrasonic treatment, and let stand to defoam for standby; Prepare the inner layer emulsion, weigh each raw material of the inner layer according to the formula, disperse the nano silver / ZnO heterojunction and calcium zinc stabilizer in polyurethane hydrogel, then add epoxidized soybean oil, stir evenly, and let stand to defoam for standby; Prepare the glove, preheat and warm the hand mold to 60 °C, then dip it in the surface layer emulsion, place it in a curing box for curing to form a porous pearlescent layer; then dip it in the middle layer emulsion, place it in a curing box for curing to form an elastic network; then dip it in the inner layer emulsion, place it in a curing box for curing to form a breathable adsorption layer; Demold the glove and package it.

[0008] During ultrasonic treatment, control the temperature of the middle layer emulsion not to exceed 60 degrees Celsius.

[0009] During ultrasonic treatment, the ultrasonic power is 250 - 400 watts, and the ultrasonic treatment duration is 50 - 110 minutes.

[0010] The surface layer emulsion is cured by 365 nm UV curing.

[0011] The curing condition of the middle layer emulsion is curing at 80 degrees Celsius for five minutes.

[0012] When the inner layer emulsion is cured, microwave curing is adopted, and the curing duration is 30 seconds.

[0013] The UV curing duration is 10 seconds.

[0014] The technical solution of the present invention has the following advantages: First, compared with traditional PVC gloves, this paste system can basically maintain the same state as traditional PVC paste, with good stability. The viscosity of the paste can be reduced to below 50 without anti-sticking, thus meeting the production requirements of glove products with different weights in different scenarios. Secondly, under the same production process conditions, this product has higher strength and resilience, better softness and comfort than traditional PVC gloves.

[0015] Second, compared with the existing synthetic imitation nitrile PVC gloves in the market, this product not only has a more stable paste system, which can reduce the difficulty of batching and production risks, but also can meet the production requirements of various weights, especially low-weight products. The hand feel is closer to that of nitrile, with good softness and flexibility.

[0016] Third, adding pearlescent powder can also increase the aesthetics of the gloves, making them more attractive in appearance. It greatly expands the market application and multi-scenario practicability of PVC gloves, is conducive to expanding the target user group, and promotes the development of the PVC glove industry towards a better and stronger direction.

[0017] The dynamic TA-Zn²⁺ coordination bond realizes microcrack repair within 5 minutes at 60°C, and the tensile strength recovery rate ≥ 92%.

[0018] The Ag / ZnO heterojunction generates reactive oxygen species (ROS) under visible light, and the antibacterial rate against Escherichia coli and Staphylococcus aureus > 99.9%.

[0019] The moisture permeability of the multi-layer structure > 2000 g / m²·24 h (JISL1099), and the moisture absorption of the inner hydrogel reaches 3 times its own weight.

[0020] Using epoxy soybean oil to replace DOTP, the VOC emission is reduced by 80%; there is no permanent deformation after 100 stretching cycles. Detailed implementation mode

[0021] The present invention will be described in detail below through specific embodiments.

[0022] The present invention provides a pearlescent high-elasticity PVC glove, which includes a surface layer, an intermediate layer and an inner layer; wherein the surface layer is a PVC layer, the intermediate layer is a self-repairing and antibacterial layer, and the inner layer is a moisture-absorbing and antibacterial layer.

[0023] Among them, by weight, the surface layer includes the following raw materials: 100 parts of PVC resin emulsion, 35 - 60 parts of epoxy soybean oil, 8 - 20 parts of pearlescent powder, 5 - 35 parts of TXIB, 0.8 - 2 parts of elastomer, 0.8 - 1 part of calcium-zinc stabilizer, 0.15 - 0.2 part of polyurethane, 120 - 190 parts of pure water, and 3 - 8 parts of fluorosilicon-modified nano-SiO2.

[0024] The intermediate layer, by weight parts, comprises the following raw materials: 30 - 50 parts of elastomer, 160 - 270 parts of tetrahydrofuran, 10 - 20 parts of epoxidized soybean oil, 5 - 10 parts of lipoic acid, 2 - 5 parts of zinc oxide nanowires, and 0.2 - 0.7 parts of calcium zinc stabilizer.

[0025] The inner layer, by weight parts, comprises the following raw materials: 1 - 3 parts of nano silver / ZnO heterojunction, 0.2 - 0.4 parts of calcium zinc stabilizer, 20 - 40 parts of polyurethane hydrogel, and 10 - 20 parts of epoxidized soybean oil.

[0026] The above - mentioned gloves are prepared by the following method: Weigh each raw material of the surface layer according to the formula, stir evenly in a stirring kettle, and then ball - mill and disperse until the particle size ≤ 100 nm to obtain the surface layer emulsion, which is left standing for defoaming and standby.

[0027] Weigh each raw material of the surface layer. Dissolve the elastomer hydrogenated nitrile rubber (HNBR) in tetrahydrofuran, then add epoxidized soybean oil, and stir evenly; then add lipoic acid, zinc oxide nanowires, and calcium zinc stabilizer to the nitrile rubber solution, stir evenly, and then maintain the temperature not exceeding 60 °C, and perform ultrasonic treatment at 250 - 400 W for 50 - 110 minutes to form a dynamic coordination network prepolymer, obtaining the intermediate layer emulsion, which is left standing for defoaming and standby.

[0028] Weigh each raw material of the inner layer. Disperse the nano silver / ZnO heterojunction and calcium zinc stabilizer in the polyurethane hydrogel, then add epoxidized soybean oil, stir evenly, and leave standing for defoaming and standby.

[0029] Preheat and warm the hand mold to 60 °C, then immerse it in the surface layer emulsion, place it in a curing box, and perform UV curing (365 nm) for 10 s to form a porous pearlescent layer; Then immerse it in the intermediate layer emulsion, place it in a curing box, and cure at 80 °C for five minutes to form an elastic network.

[0030] Then immerse it in the inner layer emulsion, place it in a microwave curing box, and cure at 2.45 GHz for 30 s to form a breathable adsorption layer.

[0031] Then demold the gloves and package them to obtain the finished product.

[0032] The Ag / ZnO heterojunction has an antibacterial rate against Escherichia coli and Staphylococcus aureus > 99.9%.

[0033] The moisture absorption of the inner layer hydrogel reaches 3 times its own weight.

[0034] Using epoxidized soybean oil to replace DOTP, the VOC emission is reduced by 80%; there is no permanent deformation after 100 stretching cycles.

[0035] The UV / thermal / microwave curing process is compatible with existing PVC glove production lines, eliminating the need for additional large-scale equipment and saving costs.

[0036] The self-healing function in this technical solution is based on the chemical mechanism of the dynamic thioctic acid-zinc ion (TA-Zn²⁺) coordination network, combined with the physical synergistic effect of the bionic multi-layer structure, to achieve active repair of material microcracks.

[0037] Structural characteristics of thioctic acid (TA) The thioctic acid molecule contains a disulfide bond (-S-S-) and a carboxylic acid group (-COOH). Its carboxylic acid group can form a coordination bond with Zn 2+ to form a stable three-dimensional cross-linked network.

[0038] Zn 2+ Coordination of zinc ions The zinc ion (Zn 2+ ²⁺) acts as a coordination center and forms dynamic metal-ligand bonds with the carboxylic acid groups of TA. This bond is reversible: when external forces cause cracks in the material, the local stress will break the coordination bond; when external energy (such as heat) is applied, Zn 2+ recoordinates with the carboxylic acid groups of TA to restore the network structure.

[0039] Reinforcement of zinc oxide nanowires (ZnO) As physical cross-linking points, the surface hydroxyl groups (-OH) of ZnO nanowires form hydrogen bonds with the carboxylic acid groups of TA, further stabilizing the network structure. At the same time, the nano-scale dispersion of ZnO improves the mechanical strength of the material and prevents crack propagation.

[0040] The TA-Zn 2+ network in the middle layer (self-healing elastic layer) is embedded in the hydrogenated nitrile rubber (HNBR) matrix to form a bionic structure with alternating "hard-soft" layers. When cracks propagate, the elastic buffering effect of HNBR disperses the stress, and the dynamic coordination network preferentially reorganizes at the crack tip to inhibit further cracking.

[0041] The present invention will be described in detail below through specific examples.

[0042] All raw materials in the following examples are in parts by weight.

[0043] Example 1 First, prepare the surface layer emulsion.

[0044] Take 100 parts of PVC resin emulsion, 60 parts of epoxidized soybean oil, 8 parts of pearlescent powder, 5 parts of TXIB, 1 part of elastomeric hydrogenated nitrile rubber, 0.8 part of calcium-zinc stabilizer, 0.2 part of polyurethane, 120 parts of pure water, and 3 parts of fluorosilicon-modified nano-SiO2, add them to a stirring kettle and stir evenly, then ball-mill and disperse to a particle size ≤ 100 nm to obtain the surface layer emulsion, and let it stand for defoaming for later use.

[0045] Prepare the intermediate layer emulsion.

[0046] Dissolve 30 parts of the elastomer hydrogenated nitrile rubber (HNBR) in 160 parts of tetrahydrofuran, then add 10 parts of epoxidized soybean oil, and stir evenly.

[0047] Then add 5 parts of lipoic acid and 2 parts of zinc oxide nanowires to the nitrile rubber solution, then add 0.2 parts of calcium-zinc stabilizer, stir evenly, then maintain the temperature not exceeding 60 °C, and perform ultrasonic treatment at 300 W for 60 minutes to form a dynamic coordination network prepolymer, obtaining the intermediate layer emulsion, and let it stand for defoaming for standby.

[0048] Prepare the inner layer emulsion.

[0049] Disperse 1 part of nano-silver / ZnO heterojunction and 0.2 parts of calcium-zinc stabilizer in 20 parts of polyurethane hydrogel, then add 11 parts of epoxidized soybean oil, stir evenly, and let it stand for defoaming for standby.

[0050] Prepare the gloves.

[0051] Preheat the hand mold to 60 °C, then dip it in the surface layer emulsion, place it in the curing box, and cure it by UV (365 nm) for 10 s to form a porous pearlescent layer; Then dip it in the intermediate layer emulsion, place it in the curing box, and cure it at 80 °C for five minutes to form an elastic network.

[0052] Then dip it in the inner layer emulsion, place it in the microwave curing box, and cure it at 2.45 GHz for 30 s to form a breathable adsorption layer.

[0053] Then demold the gloves and package them to obtain the finished product.

[0054] Example 2 Take 100 parts of PVC, 50 parts of epoxidized soybean oil, 10 parts of pearlescent powder, 15 parts of TXIB, 1 part of elastomer hydrogenated nitrile rubber, 1 part of calcium-zinc stabilizer, 0.2 part of polyurethane, 150 parts of pure water, and 3.5 parts of fluorosilicon-modified nano-SiO2, add them to the stirring kettle and stir evenly, then ball mill and disperse to a particle size ≤ 100 nm to obtain the surface layer emulsion, and let it stand for defoaming for standby.

[0055] Prepare the intermediate layer emulsion Dissolve 35 parts of the elastomer hydrogenated nitrile rubber (HNBR) in 170 parts of tetrahydrofuran, then add 10 parts of epoxidized soybean oil, and stir evenly.

[0056] Then add 7 parts of lipoic acid and 3.5 parts of zinc oxide nanowires to the nitrile rubber solution, and stir evenly with 0.3 parts of calcium-zinc stabilizer. Then maintain the temperature not exceeding 60 °C, and perform ultrasonic treatment at 300 W for 60 minutes to form a dynamic coordination network prepolymer, obtaining the intermediate layer emulsion, and let it stand for defoaming for standby.

[0057] Prepare the inner layer emulsion.

[0058] Disperse 1 part of the nano silver / ZnO heterojunction and 0.2 part of the calcium-zinc stabilizer in 35 parts of the polyurethane hydrogel, then add 10 parts of the epoxy soybean oil, and stir evenly. Let it stand for defoaming for later use.

[0059] Prepare the gloves.

[0060] Preheat the hand mold to 60 °C, then dip it in the surface layer emulsion, place it in the curing box, and cure it by UV (365 nm) for 10 s to form a porous pearlescent layer; Then dip it in the intermediate layer emulsion, place it in the curing box, and cure it at 80 °C for five minutes to form an elastic network.

[0061] Then dip it in the inner layer emulsion, place it in the microwave curing box, and cure it at 2.45 GHz for 30 s to form a breathable adsorption layer.

[0062] Then demold the gloves and package them to obtain the finished product.

[0063] Example 3 First, prepare the surface layer emulsion.

[0064] Take 100 parts of the PVC resin emulsion, 45 parts of the epoxy soybean oil, 10 parts of the pearlescent powder, 25 parts of the TXIB, 2 parts of the elastomer hydrogenated nitrile rubber, 1 part of the calcium-zinc stabilizer, 0.15 part of the polyurethane, 150 parts of the pure water, and 5 parts of the fluorosilicon-modified nano-SiO2, add them to the stirring kettle and stir evenly, then ball mill and disperse them until the particle size ≤ 100 nm to obtain the surface layer emulsion. Let it stand for defoaming for later use.

[0065] Prepare the intermediate layer emulsion Dissolve 45 parts of the elastomer hydrogenated nitrile rubber (HNBR) in 255 parts of the tetrahydrofuran, then add 15 parts of the epoxy soybean oil, and stir evenly.

[0066] Then add 9 parts of the lipoic acid and 4.5 parts of the zinc oxide nanowires to the nitrile rubber solution, then add 0.6 part of the calcium-zinc stabilizer, stir evenly, and then maintain the temperature not exceeding 60 °C and perform ultrasonic treatment at 400 W for 50 minutes to form a dynamic coordination network prepolymer to obtain the intermediate layer emulsion. Let it stand for defoaming for later use.

[0067] Prepare the inner layer emulsion.

[0068] Disperse 2.5 parts of the nano silver / ZnO heterojunction and 0.3 part of the calcium-zinc stabilizer in 40 parts of the polyurethane hydrogel, then add 15 parts of the epoxy soybean oil, stir evenly, and let it stand for defoaming for later use.

[0069] Prepare the gloves.

[0070] Preheat the hand mold to 60°C, then immerse it in the surface layer emulsion, place it in the curing chamber, and cure it by UV (365nm) for 10s to form a porous pearlescent layer; Then immerse it in the intermediate layer emulsion, place it in the curing chamber, and cure it at 80°C for five minutes to form an elastic network.

[0071] Then immerse it in the inner layer emulsion, place it in the microwave curing chamber, and cure it at 2.45GHz for 30s to form a breathable adsorption layer.

[0072] Then demold the glove and package it to obtain the finished product.

[0073] Example 4 First, prepare the surface layer emulsion.

[0074] Take 100 parts of PVC resin emulsion, 55 parts of epoxidized soybean oil, 15 parts of pearlescent powder, 15 parts of TXIB, 1.5 parts of elastomeric hydrogenated nitrile rubber, 1 part of calcium-zinc stabilizer, 0.2 part of polyurethane, 170 parts of pure water, and 7 parts of fluorosilicon-modified nano-SiO2, add them to the stirring kettle and stir evenly, then ball mill and disperse to a particle size ≤100nm to obtain the surface layer emulsion, and let it stand for defoaming for later use.

[0075] Prepare the intermediate layer emulsion Dissolve 40 parts of elastomeric hydrogenated nitrile rubber (HNBR) in 190 parts of tetrahydrofuran, then add 20 parts of epoxidized soybean oil and stir evenly.

[0076] Then add 10 parts of lipoic acid and 5 parts of zinc oxide nanowires to the nitrile rubber solution, then add 0.5 part of calcium-zinc stabilizer, stir evenly, and then maintain the temperature not exceeding 60°C and perform ultrasonic treatment at 300W for 70 minutes to form a dynamic coordination network prepolymer to obtain the intermediate layer emulsion, and let it stand for defoaming for later use.

[0077] Prepare the inner layer emulsion.

[0078] Disperse 1.5 parts of nano-silver / ZnO heterojunction and 0.2 part of calcium-zinc stabilizer in 20 parts of polyurethane hydrogel, then add 20 parts of epoxidized soybean oil and stir evenly, and let it stand for defoaming for later use.

[0079] Prepare the glove.

[0080] Preheat the hand mold to 60°C, then immerse it in the surface layer emulsion, place it in the curing chamber, and cure it by UV (365nm) for 10s to form a porous pearlescent layer; Then immerse it in the intermediate layer emulsion, place it in the curing chamber, and cure it at 80°C for five minutes to form an elastic network.

[0081] Then immerse it in the inner layer emulsion, place it in the microwave curing chamber, and cure it at 2.45GHz for 30s to form a breathable adsorption layer.

[0082] Then, the glove is demolded and packaged to obtain the finished product.

[0083] Example 5 First, prepare the surface layer emulsion.

[0084] Take 100 parts of PVC resin emulsion, 60 parts of epoxidized soybean oil, 20 parts of pearlescent powder, 10 parts of TXIB, 2 parts of elastomeric hydrogenated nitrile rubber, 0.8 parts of calcium-zinc stabilizer, 0.2 parts of polyurethane, 190 parts of pure water, and 6.5 parts of fluorosilicon-modified nano-SiO2, add them to a stirring kettle and stir evenly, then ball mill and disperse to a particle size ≤ 100 nm to obtain the surface layer emulsion, and let it stand for defoaming for later use.

[0085] Prepare the intermediate layer emulsion Dissolve 38 parts of elastomeric hydrogenated nitrile rubber (HNBR) in 230 parts of tetrahydrofuran, then add 13 parts of epoxidized soybean oil and stir evenly.

[0086] Then add 6 parts of lipoic acid and 3 parts of zinc oxide nanowires to the nitrile rubber solution, then add 0.7 parts of calcium-zinc stabilizer, stir evenly, then maintain the temperature not exceeding 60 °C, and perform ultrasonic treatment at 250 W for 95 minutes to form a dynamic coordination network prepolymer to obtain the intermediate layer emulsion, and let it stand for defoaming for later use.

[0087] Prepare the inner layer emulsion.

[0088] Disperse 2 parts of nano-silver / ZnO heterojunction and 0.4 parts of calcium-zinc stabilizer in 18 parts of polyurethane hydrogel, then add 11 parts of epoxidized soybean oil and stir evenly, and let it stand for defoaming for later use.

[0089] Prepare the glove.

[0090] Preheat the hand mold to 60 °C, then immerse it in the surface layer emulsion, place it in a curing box, and cure it by UV (365 nm) for 10 s to form a porous pearlescent layer; Then immerse it in the intermediate layer emulsion, place it in a curing box, and cure it at 80 °C for five minutes to form an elastic network.

[0091] Then immerse it in the inner layer emulsion, place it in a microwave curing box, and cure it at 2.45 GHz for 30 s to form a breathable adsorption layer.

[0092] Then, the glove is demolded and packaged to obtain the finished product.

[0093] Example 6 First, prepare the surface layer emulsion.

[0094] Take 100 parts of PVC resin emulsion, 35 parts of epoxidized soybean oil, 15 parts of pearlescent powder, 35 parts of TXIB, 0.8 part of elastomeric hydrogenated nitrile rubber, 0.8 part of calcium-zinc stabilizer, 0.2 part of polyurethane, 175 parts of pure water, and 8 parts of fluorosilicon-modified nano-SiO₂, add them to a stirring kettle and stir evenly, then ball-mill and disperse to a particle size ≤ 100 nm to obtain a surface layer emulsion, and let it stand for defoaming for later use.

[0095] Prepare the intermediate layer emulsion Dissolve 50 parts of elastomeric hydrogenated nitrile rubber (HNBR) in 370 parts of tetrahydrofuran, then add 17 parts of epoxidized soybean oil and stir evenly.

[0096] Then add 7 parts of lipoic acid and 3.5 parts of zinc oxide nanowires to the nitrile rubber solution, then add 0.5 part of calcium-zinc stabilizer, stir evenly, then maintain the temperature not exceeding 60 °C and perform ultrasonic treatment at 250 W for 110 minutes to form a dynamic coordination network prepolymer to obtain the intermediate layer emulsion, and let it stand for defoaming for later use. During ultrasonic treatment, pause for 2 minutes every 10 minutes of work.

[0097] Prepare the inner layer emulsion.

[0098] Disperse 3 parts of nano-silver / ZnO heterojunction and 0.3 part of calcium-zinc stabilizer in 35 parts of polyurethane hydrogel, then add 13 parts of epoxidized soybean oil and stir evenly, and let it stand for defoaming for later use.

[0099] Prepare gloves.

[0100] Preheat the hand mold to 60 °C, then dip it in the surface layer emulsion, place it in a curing box, and cure it by UV (365 nm) for 10 s to form a porous pearlescent layer; Then dip it in the intermediate layer emulsion, place it in a curing box, and cure it at 80 °C for five minutes to form an elastic network.

[0101] Then dip it in the inner layer emulsion, place it in a microwave curing box, and cure it at 2.45 GHz for 30 s to form a breathable adsorption layer.

[0102] Then demold the gloves and package them to obtain the finished product.

[0103] The mass concentration of the polyurethane hydrogel in the above examples is 18%.

[0104] The preparation method of the nano-silver / ZnO heterojunction in the above examples is prior art and will not be elaborated here.

[0105] Comparative Example 1 A pearlescent PVC glove added with elastomeric rubber. By weight fraction, the raw material composition is as follows: 100 parts of PVC resin emulsion, 50 parts of DOTP, 10 parts of pearlescent powder, 15 parts of TXIB, 1 part of elastomeric hydrogenated nitrile rubber, 1 part of calcium-zinc stabilizer, 0.2 part of polyurethane, and 150 parts of pure water. The preparation process is as follows: Mix the above raw materials in proportion, stir well, stand for defoaming, preheat the hand mold to 60 °C, then dip the surface layer emulsion, place it in a curing box, preheat the hand mold to 60 °C, then dip the surface layer emulsion, place it in a curing box, cure at 80 °C for five minutes; then crimp and demold, and package the finished product to obtain the product, which has a soft touch, good resilience, and a pearlescent luster.

[0106] Comparative Example 2 A pearlescent PVC glove added with elastomeric rubber. By weight fraction, the raw material composition is as follows: 100 parts of PVC resin emulsion, 45 parts of DOTP, 10 parts of pearlescent powder, 25 parts of TXIB, 2 parts of elastomeric hydrogenated nitrile rubber, 1 part of calcium-zinc stabilizer, 0.15 part of polyurethane, and 150 parts of pure water. The preparation process is as follows: Mix the above raw materials in proportion, stir well, stand for defoaming, then dip the surface layer emulsion, place it in a curing box, cure at 80 °C for five minutes, crimp and demold, and package the finished product to obtain the product, which has a soft touch, good resilience, and a pearlescent luster.

[0107] In the above examples and comparative examples, the pearlescent powder is mica powder; TXIB environmental protection plasticizer is a multi-purpose modifier for polyvinyl chloride (PVC) and other resins, and is an excellent primary plasticizer.

[0108] Test the tensile strength, elongation at break, antibacterial rate, moisture permeability rate, self-healing rate, etc. of the gloves in the above examples and comparative examples.

[0109] The tensile strength and elongation at break are carried out in accordance with GB / T528.

[0110] The antibacterial rate is measured by the following method: Take the glove sample, cut it into pieces of 0.5 cm * 0.5 cm, weigh 1.00 g, and place it in a 200 ml conical flask; add 100 ml of phosphate buffer solution and 5 ml of Staphylococcus aureus bacterial solution (23500 vfu▪mL -1 ), and culture at 25 °C and 200 revolutions per minute for 2.5 hours.

[0111] Self-healing rate test: Refer to GB / T528 to obtain the specimen, stretch the specimen until cracks appear, heat it at 60 °C for 5 minutes, and utilize the thermoreversibility of the thioctic acid dynamic disulfide bond to achieve recombination, and compare the tensile strength before and after repair.

[0112]

[0113] The above embodiments are merely examples given for clear illustration, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. A pearlescent high-elasticity PVC glove, characterized in that: It includes a surface layer, an intermediate layer and an inner layer. The surface layer, by weight, comprises the following raw materials: 100 parts of PVC resin emulsion, 35 - 60 parts of epoxy soybean oil, 8 - 20 parts of pearlescent powder, 5 - 35 parts of TXIB, 0.8 - 2 parts of elastomer, 0.8 - 1 part of calcium-zinc stabilizer, 0.15 - 0.2 part of polyurethane, 120 - 190 parts of pure water, and 3 - 8 parts of fluorosilicon-modified nano-SiO₂; The intermediate layer, by weight, comprises the following raw materials: 30 - 50 parts of elastomer, 160 - 270 parts of tetrahydrofuran, 10 - 20 parts of epoxy soybean oil, 5 - 10 parts of lipoic acid, 2 - 5 parts of zinc oxide nanowires, and 0.2 - 0.7 part of calcium-zinc stabilizer; The inner layer, by weight, comprises the following raw materials: 1 - 3 parts of nano-silver / ZnO heterojunction, 0.2 - 0.4 part of calcium-zinc stabilizer, 20 - 40 parts of polyurethane hydrogel, and 10 - 20 parts of epoxy soybean oil.

2. The pearlescent high-elastic PVC glove according to claim 1, wherein: The surface layer, by weight, comprises the following raw materials: 100 parts of PVC resin emulsion, 45 parts of epoxy soybean oil, 10 parts of pearlescent powder, 25 parts of TXIB, 2 parts of elastomer, 1 part of calcium-zinc stabilizer, 0.152 part of polyurethane, 150 parts of pure water, and 5 parts of fluorosilicon-modified nano-SiO₂; The intermediate layer, by weight, comprises the following raw materials: 45 parts of elastomer, 255 parts of tetrahydrofuran, 15 parts of epoxy soybean oil, 9 parts of lipoic acid, 4.5 parts of zinc oxide nanowires, and 0.6 part of calcium-zinc stabilizer; The inner layer, by weight, comprises the following raw materials: 2.5 parts of nano-silver / ZnO heterojunction, 0.3 part of calcium-zinc stabilizer, 35 parts of polyurethane hydrogel, and 15 parts of epoxy soybean oil.

3. The pearlescent highly elastic PVC glove according to claim 1 or 2, characterized in that: The elastomer is hydrogenated nitrile rubber.

4. The preparation method of the pearlescent highly elastic PVC glove according to claim 1 or 2, characterized in that, It includes the following steps: Prepare the surface layer emulsion. Weigh each raw material of the surface layer according to the formula, stir evenly, then ball-mill and disperse to a particle size ≤ 100 nm, and let it stand for defoaming for later use; Prepare the intermediate layer emulsion. Weigh each raw material of the intermediate layer according to the formula. Dissolve the elastomer hydrogenated nitrile rubber in tetrahydrofuran, then add epoxy soybean oil and stir evenly; then add lipoic acid, zinc oxide nanowires, and calcium-zinc stabilizer to the nitrile rubber solution, stir evenly, perform ultrasonic treatment, and let it stand for defoaming for later use; Prepare the inner layer emulsion. Weigh each raw material of the inner layer according to the formula. Disperse the nano-silver / ZnO heterojunction and calcium-zinc stabilizer in the polyurethane hydrogel, then add epoxy soybean oil, stir evenly, and let it stand for defoaming for later use; Prepare the glove. Preheat and warm the hand mold to 60 °C, then dip it in the surface layer emulsion, place it in a curing box for curing to form a porous pearlescent layer; then dip it in the intermediate layer emulsion, place it in a curing box for curing to form an elastic network; then dip it in the inner layer emulsion, place it in a curing box for curing to form a breathable adsorption layer; Demold the glove and package it.

5. The preparation method of the pearlescent highly elastic PVC glove according to claim 4, characterized in that, During ultrasonic treatment, control the temperature of the intermediate layer emulsion not to exceed 60 degrees Celsius.

6. The preparation method of the pearlescent highly elastic PVC glove according to claim 4 or 5, characterized in that, During ultrasonic treatment, the ultrasonic power is 250 - 400 watts, and the ultrasonic treatment duration is 50 - 110 minutes.

7. The preparation method of the pearlescent highly elastic PVC gloves according to claim 4, characterized in that, The surface layer emulsion is cured by 365 nm UV curing.

8. The preparation method of the pearlescent highly elastic PVC glove according to claim 4, characterized in that, The curing condition of the intermediate layer emulsion is curing at 80 degrees Celsius for five minutes.

9. The preparation method of the pearlescent highly elastic PVC glove according to claim 4, characterized in that, The inner layer emulsion is cured by microwave curing, and the curing duration is 30 seconds.

10. The preparation method of the pearlescent highly elastic PVC glove according to claim 7, characterized in that, The UV curing duration is 10 seconds.

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