High-elasticity and high-toughness glove material and preparation method thereof

Abstract

The invention relates to the technical field of material preparation, and particularly discloses a high-elasticity and high-toughness glove material and a preparation method thereof. The high-elasticity and high-toughness glove material is prepared from the following raw material components in parts by mass: 100 parts of a rubber matrix, 3 to 4 parts of a vulcanizing agent, 2 to 3 parts of an activating agent, 8 to 10 parts of a reinforcing agent, 5 to 7 parts of a toughening agent, 2 to 4 parts of nano zinc oxide, 2 to 4 parts of polyethylene glycol and 3 to 5 parts of an auxiliary agent, the rubber matrix comprises brominated butyl rubber, acrylate rubber and chlorosulfonated polyethylene rubber; the reinforcing agent is prepared from polycaprolactone modified sodium bentonite. According to the high-elasticity and high-toughness glove material provided by the invention, the brominated butyl rubber, the acrylate rubber and the chlorosulfonated polyethylene rubber are used as rubber matrixes, the polycaprolactone modified sodium bentonite is used as a reinforcing agent, and the toughness and resilience of the glove material can be obviously improved by optimizing the components of the glove material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material preparation, and particularly relates to a high-elasticity and high-toughness glove material and a preparation method thereof. BACKGROUND

[0002] Rubber gloves are widely used in medical care, chemical operation, daily cleaning and other fields due to good isolation and protection performance, and the safety and comfort of the rubber gloves directly depend on the elasticity and toughness of the material. However, the existing rubber glove material generally has the technical defects of insufficient toughness and poor elastic recovery performance, which seriously limits the application of the rubber glove material in complex working conditions.

[0003] In actual use, the traditional rubber gloves are prone to tearing, puncture and damage, and the risk of rupture is significantly increased, especially when contacting sharp objects or repeatedly bending and stretching. Meanwhile, the rubber gloves are prone to permanent deformation after long-term wearing or stress, and cannot quickly recover to the original state, which leads to a decrease in wearing fit and affects the operation flexibility. The above problems may be caused by the following factors. On the one hand, the existing gloves commonly use single or simple composite rubber matrixes such as natural rubber and nitrile rubber, and the uniformity of the cross-linking of the molecular chain structure is poor, and it is difficult to balance the elasticity and toughness. On the other hand, the existing vulcanization process mostly uses single high-temperature vulcanization, which easily causes uneven cross-linking density, and the increased brittleness of the over-cross-linked part and the poor elasticity of the insufficiently cross-linked part. In addition, the compatibility of the traditional reinforcing and toughening system with the rubber matrix is poor, and the reinforcing and toughening system is not uniformly dispersed, which cannot effectively improve the mechanical properties of the material, and even may cause local stress concentration due to agglomeration, further aggravating the toughness defect. Therefore, in view of the core problems of the poor elastic recovery and insufficient toughness of the existing rubber glove material, it is a technical requirement to be solved in the current field to develop a glove material that can improve the elastic recovery and toughness by optimizing the rubber matrix ratio, improving the vulcanization process and the reinforcing and toughening system. SUMMARY

[0004] In view of this, the present application provides a high-elasticity and high-toughness glove material and a preparation method thereof. The present application solves the problems of poor elastic recovery and insufficient toughness of the existing rubber glove material by optimizing the composition of the high-elasticity and high-toughness glove material.

[0005] To achieve the above-mentioned application purposes, the present application adopts the following technical solutions: The present application provides a high-elasticity and high-toughness glove material, which comprises the following raw material components in mass fraction: 100 parts of a rubber matrix, 3-4 parts of a vulcanizing agent, 2-3 parts of an activator, 8-10 parts of a reinforcing agent, 5-7 parts of a toughening agent, 2-4 parts of nano zinc oxide, 2-4 parts of polyethylene glycol and 3-5 parts of an auxiliary agent. The rubber matrix comprises brominated butyl rubber, acrylate rubber and chlorosulfonated polyethylene rubber. The reinforcing agent comprises poly-caprolactone modified sodium bentonite.

[0006] Compared with the prior art, the high-elasticity and high-toughness glove material provided by the application can ensure excellent resilience of the glove material due to the brominated butyl rubber, excellent cross-linking activity of the acrylate rubber, stable network structure of the glove material due to the acrylate rubber, and excellent tear resistance of the chlorosulfonated polyethylene rubber, which can further enhance the toughness of the glove material. The three kinds of rubber are combined creatively, and the three-component system synergizes to significantly improve and balance the elasticity and toughness of the glove, so that the glove has high elasticity and high toughness. The vulcanizing agent and nano zinc oxide can fully activate the vulcanization active sites of the three rubber matrices, promote the formation of a uniform and dense three-dimensional cross-linking network, and further improve the toughness and resilience of the glove material. The sodium-based bentonite modified by polycaprolactone can hinder the sliding of rubber molecular chains under external force, improve the elastic resilience, and the modified sodium-based bentonite can also absorb impact energy and inhibit crack propagation, thereby improving the toughness of the glove material. The polyethylene glycol can also effectively avoid the agglomeration of the reinforcing agent and nano zinc oxide and other powders, thereby improving the performance of the glove material.

[0007] The high-elasticity and high-toughness glove material provided by the application uses brominated butyl rubber, acrylate rubber and chlorosulfonated polyethylene rubber as the rubber matrix, and uses sodium-based bentonite modified by polycaprolactone as the reinforcing agent. The composition of the glove material is optimized, and the toughness and resilience of the glove material can be significantly improved.

[0008] Preferably, the preparation method of the sodium-based bentonite modified by polycaprolactone comprises the following steps: S1, dissolving polycaprolactone in tetrahydrofuran to obtain a polycaprolactone mixture; S2, adding sodium-based bentonite and silane coupling agent to the polycaprolactone mixture to react to obtain the sodium-based bentonite modified by polycaprolactone.

[0009] The preparation method of the sodium-based bentonite modified by polycaprolactone provided by the application uses tetrahydrofuran as the solvent, which is beneficial to the intercalation of polycaprolactone into sodium-based bentonite, and the silane coupling agent helps to strengthen the combination of the two. The sodium-based bentonite modified by polycaprolactone prepared by the above method can be applied to glove material, which can significantly improve the toughness and resilience of the glove material.

[0010] Preferably, in S1, the mass-volume ratio of the polycaprolactone and tetrahydrofuran is 10g: (90-110) mL.

[0011] It should be further pointed out that in S2, the sodium-based bentonite also needs to be pretreated and dried at 100-110℃.

[0012] Preferably, in S2, the particle size of the sodium-based bentonite is 150-300nm.

[0013] Preferably, in S2, the silane coupling agent is KH-550.

[0014] Preferably, in S2, the mass ratio of the sodium bentonite and the polycaprolactone is 10: (3~5).

[0015] Preferably, in S2, the mass ratio of the sodium bentonite and the silane coupling agent is 10: (0.5~1).

[0016] Preferably, in S2, the temperature of the reaction is 40~50℃.

[0017] Preferably, in S2, the time of the reaction is 45~55min.

[0018] Preferably, in S2, the reaction is performed by ultrasonic treatment, the power of the ultrasonic is 300~400W, and the frequency of the ultrasonic is 40kHz.

[0019] It is further explained that, in S2, the reaction system after the reaction is finished is subjected to vacuum distillation, washing, and drying to obtain the polycaprolactone modified sodium bentonite.

[0020] Preferably, the rubber matrix comprises the following components in the following mass percentages: bromobutyl rubber 40%~50%, acrylate rubber 25%~35%, and chlorosulfonated polyethylene rubber 20%~30%.

[0021] The present application further limits the ratio of the components in the rubber matrix, which is beneficial to further improve the performance of the rubber matrix.

[0022] Preferably, the vulcanizing agent comprises 2-mercaptobenzothiazyl zinc salt and trimethylolpropane trimethacrylate.

[0023] The preferred vulcanizing agent can promote the rubber matrix to form a uniform and dense crosslinking network, thereby effectively improving the resilience and toughness of the glove material.

[0024] Further preferably, the vulcanizing agent comprises 2-mercaptobenzothiazyl zinc salt and trimethylolpropane trimethacrylate in a mass ratio of (1.5~2):1.

[0025] Preferably, the toughening agent comprises chlorinated polyethylene.

[0026] Preferably, the polyethylene glycol is polyethylene glycol 400.

[0027] Preferably, the particle size of the nano-zinc oxide is 20~50nm.

[0028] Preferably, the auxiliary agent comprises zinc stearate and hindered phenolic antioxidant.

[0029] Further preferably, the auxiliary agent comprises zinc stearate and hindered phenolic antioxidant in a mass ratio of (1-1.5):(0.5-1).

[0030] Preferably, the activator comprises magnesium oxide.

[0031] Further preferably, the magnesium oxide has a particle size of 1-3 μm.

[0032] The present application provides a method for preparing the high-elasticity and high-toughness glove material as described above, comprising the following steps: Step 1. First-time mixing of the weighed rubber matrix to obtain a first-time mixed rubber; Step 2. Mixing the activator, nano-zinc oxide, reinforcing agent, polyethylene glycol and auxiliary agent uniformly and then adding them to the first-time mixed rubber for second-time mixing to obtain a second-time mixed mixture; Step 3. Adding the toughening agent to the second-time mixed mixture for third-time mixing to obtain a third-time mixed mixture; Step 4. Adding the vulcanizing agent to the third-time mixed mixture for fourth-time mixing and vulcanization to obtain the high-elasticity and high-toughness glove material.

[0033] Preferably, in Step 1, the temperature of the first-time mixing is 80-90°C and the time is 3-5 min.

[0034] Preferably, in Step 2, the temperature of the second-time mixing is 80-90°C and the time is 5-8 min.

[0035] Preferably, in Step 3, the temperature of the third-time mixing is 80-90°C and the time is 2-3 min.

[0036] Preferably, in Step 4, the temperature of the fourth-time mixing is 60-70°C and the time is 2-3 min.

[0037] Preferably, in Step 4, the vulcanization is divided into first-time vulcanization treatment and second-time vulcanization treatment.

[0038] Further preferably, the temperature of the first-time vulcanization treatment is 150-160°C and the time is 15-20 min.

[0039] Further preferably, the temperature of the second-time vulcanization treatment is 120-130°C and the time is 2-3 min.

[0040] In the method for preparing the high-elasticity and high-toughness glove material provided by the present application, the process of partial mixing and partial vulcanization significantly improves the elasticity and toughness of the glove material. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0042] In the examples and comparative examples of the present application, the brominated butyl rubber is purchased from Shanghai Panren International Trade Co., Ltd., and the type number is 2030; the acrylate rubber is purchased from Anhui Lixin Rubber Technology Co., Ltd., and the type number is ACM; the chlorosulfonated polyethylene rubber is purchased from Guangzhou Liben Rubber Raw Material Trade Co., Ltd., and the type number is CSM; the hindered phenolic antioxidant is purchased from Dongguan Dinghai Plastic Chemical Co., Ltd., and the product type number is antioxidant AO-60 (1010); and the polycaprolactone is purchased from Wuhan Chengtian Fine Chemical Co., Ltd.

[0043] The raw materials and reagents used in the present application are all conventional commercially available products unless otherwise specified; and the methods used in the present application are all conventional methods in the art unless otherwise specified.

[0044] Example 1 The present embodiment provides a high-elasticity and high-toughness glove material, which comprises the following raw material components in mass fraction: 100 parts of a rubber matrix, 4 parts of a vulcanizing agent, 2 parts of magnesium oxide with a particle size of 1-3 μm, 8 parts of polycaprolactone modified sodium-based bentonite, 7 parts of chlorinated polyethylene, 2 parts of nano-zinc oxide with a particle size of 20-30 nm, 2 parts of polyethylene glycol 400, and 5 parts of an additive. The rubber matrix comprises the following components in mass percentage: 40% of brominated butyl rubber, 30% of acrylate rubber, and 30% of chlorosulfonated polyethylene rubber. The preparation method of the polycaprolactone modified sodium-based bentonite comprises the following steps: S1, polycaprolactone is dissolved in tetrahydrofuran at a mass-volume ratio of 10 g:100 mL to obtain a polycaprolactone mixture; S2, dry sodium-based bentonite with a particle size of 150-200 nm and silane coupling agent KH-550 are added to the polycaprolactone mixture, ultrasonic treatment is carried out at 40°C for 50 min, the power is 300 W, the ultrasonic frequency is 40 kHz, after the ultrasonic treatment is completed, the product is subjected to vacuum distillation, washing, and drying to obtain polycaprolactone modified sodium-based bentonite; wherein the mass ratio of sodium-based bentonite to polycaprolactone is 10:5, and the mass ratio of sodium-based bentonite to silane coupling agent is 10:1; The vulcanizing agent comprises 2-mercaptobenzothiazole zinc salt and trimethylolpropane trimethacrylate at a mass ratio of 2:1; The additive comprises zinc stearate and hindered phenolic antioxidant at a mass ratio of 1:1.

[0045] The present embodiment also provides a preparation method of the above-mentioned material, which comprises the following steps: Step 1, the weighed rubber matrix is mixed at 90℃ for 5 min to obtain a first mixing rubber; Step 2, magnesium oxide, nano zinc oxide, polycaprolactone modified sodium bentonite, polyethylene glycol 400 and auxiliary agent are mixed uniformly and then added into the first mixing rubber, and mixed at 90℃ for 8 min to obtain a second mixing mixture; Step 3, chlorinated polyethylene is added into the second mixing mixture, and mixed at 90℃ for 2 min to obtain a third mixing mixture; Step 4, curing agent is added into the third mixing mixture, and mixed at 60℃ for 2 min, and then treated at 150℃ for 15 min and at 130℃ for 3 min to obtain the high-elastic and high-toughness glove material.

[0046] Example 2 The present embodiment provides a high-elastic and high-toughness glove material, which comprises the following raw material components in mass fraction: rubber matrix 100 parts, curing agent 3 parts, magnesium oxide with particle size of 1-3 μm 3 parts, polycaprolactone modified sodium bentonite 10 parts, chlorinated polyethylene 5 parts, nano zinc oxide with particle size of 40-50 nm 4 parts, polyethylene glycol 400 4 parts, and auxiliary agent 3 parts. The rubber matrix comprises the following components in mass percentage: brominated butyl rubber 50%, acrylate rubber 25%, and chlorosulfonated polyethylene rubber 25%; The preparation method of the polycaprolactone modified sodium bentonite comprises the following steps: S1, polycaprolactone is dissolved in tetrahydrofuran at a mass-volume ratio of 10g:90mL to obtain a polycaprolactone mixture; S2, dry sodium bentonite with particle size of 250-300 nm and silane coupling agent KH-550 are added into the polycaprolactone mixture, and ultrasonic treatment is carried out at 50℃ for 45 min, with power of 350W and ultrasonic frequency of 40kHz; after the ultrasonic treatment, the product is subjected to vacuum distillation, washing and drying to obtain the polycaprolactone modified sodium bentonite; wherein the mass ratio of sodium bentonite to polycaprolactone is 10:3, and the mass ratio of sodium bentonite to silane coupling agent is 10:0.5; The curing agent comprises 2-mercaptobenzothiazole zinc salt and trimethylolpropane trimethacrylate at a mass ratio of 1.5:1; The auxiliary agent comprises zinc stearate and hindered phenolic antioxidant at a mass ratio of 1.5:1.

[0047] The present embodiment also provides a preparation method of the above material, which comprises the following steps: Step 1, the weighed rubber matrix is mixed at 80℃ for 3 min to obtain a first mixing rubber; Step 2, magnesium oxide, nano zinc oxide, polycaprolactone modified sodium bentonite, polyethylene glycol 400 and auxiliary agent are mixed uniformly and then added into the once-mixed rubber, and then mixed at 80℃ for 5min to obtain a twice-mixed mixture; Step 3, chlorinated polyethylene is added into the twice-mixed mixture, and then mixed at 90℃ for 3min to obtain a thrice-mixed mixture; Step 4, curing agent is added into the thrice-mixed mixture, and then mixed at 70℃ for 3min, and then treated at 160℃ for 20min, and then treated at 120℃ for 2min to obtain the high-elasticity and high-toughness glove material.

[0048] Example 3 The embodiment provides a high-elasticity and high-toughness glove material, which comprises the following raw material components in mass fractions: rubber matrix 100 parts, curing agent 3 parts, magnesium oxide with a particle size of 1-3μm 3 parts, polycaprolactone modified sodium bentonite 10 parts, chlorinated polyethylene 7 parts, nano zinc oxide with a particle size of 40-50nm 4 parts, polyethylene glycol 400 4 parts, and auxiliary agent 3 parts. The rubber matrix comprises the following components in mass percentages: brominated butyl rubber 45%, acrylate rubber 30%, and chlorosulfonated polyethylene rubber 25%. The preparation method of the polycaprolactone modified sodium bentonite comprises the following steps: S1, polycaprolactone is dissolved in tetrahydrofuran according to a mass-volume ratio of 10g:110mL to obtain a polycaprolactone mixture; S2, dry sodium bentonite with a particle size of 250-300nm and silane coupling agent KH-550 are added into the polycaprolactone mixture, and then treated by ultrasonic at 50℃ for 55min, wherein the power is 400W and the frequency is 40kHz; after the ultrasonic treatment, the product is subjected to vacuum distillation, washing and drying to obtain the polycaprolactone modified sodium bentonite; wherein the mass ratio of sodium bentonite to polycaprolactone is 10:4, and the mass ratio of sodium bentonite to silane coupling agent is 10:1. The curing agent comprises 2-mercaptobenzothiazole zinc salt and trimethylolpropane trimethacrylate in a mass ratio of 2:1. The auxiliary agent comprises zinc stearate and hindered phenolic antioxidant in a mass ratio of 1:0.5.

[0049] The embodiment also provides a preparation method of the above material, which comprises the following steps: Step 1, the weighed rubber matrix is mixed at 80℃ for 4min to obtain once-mixed rubber; Step 2, magnesium oxide, nano zinc oxide, polycaprolactone modified sodium bentonite, polyethylene glycol 400 and auxiliary agent are mixed uniformly and then added into the once-mixed rubber, and then mixed at 85℃ for 6min to obtain a twice-mixed mixture; Step 3, chlorinated polyethylene is added into the secondary internal mixer mixture, and is internally mixed for 3 min at 90℃ to obtain a tertiary internal mixer mixture; Step 4, the vulcanizing agent is added into the tertiary internal mixer mixture, and is internally mixed for 3 min at 70℃, and is vulcanized for 20 min at 160℃, and then is vulcanized for 2 min at 120℃ to obtain the high-elastic high-toughness glove material.

[0050] Comparative Example 1 This comparative example provides a glove material, which is different from Example 1 in that polycaprolactone is replaced by an equal amount of polylactic acid, which is purchased from Shanghai Baohua Li'nen Plastic Co., Ltd.; Specifically, the raw material components include the following mass fractions: 100 parts of rubber matrix, 4 parts of vulcanizing agent, 2 parts of magnesium oxide with a particle size of 1-3 μm, 8 parts of polylactic acid modified sodium-based bentonite, 7 parts of chlorinated polyethylene, 2 parts of nano-zinc oxide with a particle size of 20-30 nm, 2 parts of polyethylene glycol 400, and 5 parts of auxiliary agent; The rubber matrix includes the following mass percentages of components: 40% of brominated butyl rubber, 30% of acrylate rubber, and 30% of chlorosulfonated polyethylene rubber; The preparation method of the polylactic acid modified sodium-based bentonite includes the following steps: S1, polylactic acid is dissolved in tetrahydrofuran at a mass-volume ratio of 10 g:100 mL to obtain a polylactic acid mixture; S2, dry sodium-based bentonite with a particle size of 150-200 nm and silane coupling agent KH-550 are added into the polylactic acid mixture, and are ultrasonically treated at 40℃ for 50 min, with a power of 300 W and a frequency of 40 kHz. After ultrasonic treatment, the product is subjected to vacuum distillation, washing, and drying to obtain the polylactic acid modified sodium-based bentonite. The mass ratio of sodium-based bentonite to polylactic acid is 10:5, and the mass ratio of sodium-based bentonite to silane coupling agent is 10:1; The vulcanizing agent includes 2-mercaptobenzothiazole zinc salt and trimethylolpropane trimethacrylate at a mass ratio of 2:1; The auxiliary agent includes zinc stearate and hindered phenolic antioxidant at a mass ratio of 1:1.

[0051] The preparation method of the above glove material is the same as that of Example 1, and only the substances need to be replaced. Details are not described here.

[0052] Comparative Example 2 This comparative example provides a glove material, which is different from Example 1 in that brominated butyl rubber is replaced by an equal amount of chlorosulfonated polyethylene rubber; The raw material components specifically include the following mass fractions: a rubber matrix 100 parts, a vulcanizing agent 4 parts, magnesium oxide with a particle size of 1-3 μm 2 parts, polycaprolactone modified sodium-based bentonite 8 parts, chlorinated polyethylene 7 parts, nano zinc oxide with a particle size of 20-30 nm 2 parts, polyethylene glycol 400 2 parts, and an auxiliary agent 5 parts; The rubber matrix includes the following mass percentages of components: 30% of acrylate rubber and 70% of chlorosulfonated polyethylene rubber; The preparation method of the polycaprolactone modified sodium-based bentonite includes the following steps: S1, polycaprolactone is dissolved in tetrahydrofuran at a mass-volume ratio of 10 g:100 mL to obtain a polycaprolactone mixed solution; S2, dry sodium-based bentonite with a particle size of 150-200 nm and silane coupling agent KH-550 are added to the polycaprolactone mixed solution, ultrasonic treatment is performed at 40°C for 50 min, the power is 300 W, the ultrasonic frequency is 40 kHz, after the ultrasonic treatment is completed, the product is subjected to vacuum distillation, washing, and drying to obtain polycaprolactone modified sodium-based bentonite; wherein the mass ratio of sodium-based bentonite to polycaprolactone is 10:5, and the mass ratio of sodium-based bentonite to silane coupling agent is 10:1; The vulcanizing agent includes 2-mercaptobenzothiazole zinc salt and trimethylolpropane trimethacrylate at a mass ratio of 2:1; The auxiliary agent includes zinc stearate and hindered phenolic antioxidant at a mass ratio of 1:1.

[0053] The preparation method of the glove material is the same as that of Example 1, and only the substances are replaced, which will not be described here.

[0054] Comparative Example 3 This comparative example provides a glove material, which is different from Example 1 in that brominated butyl rubber is replaced by an equal amount of nitrile rubber, which is purchased from Jingjiang Kanggaote New Material Technology Co., Ltd.; The raw material components specifically include the following mass fractions: a rubber matrix 100 parts, a vulcanizing agent 4 parts, magnesium oxide with a particle size of 1-3 μm 2 parts, polycaprolactone modified sodium-based bentonite 8 parts, chlorinated polyethylene 7 parts, nano zinc oxide with a particle size of 20-30 nm 2 parts, polyethylene glycol 400 2 parts, and an auxiliary agent 5 parts; The rubber matrix includes the following mass percentages of components: 40% of nitrile rubber, 30% of acrylate rubber, and 30% of chlorosulfonated polyethylene rubber; The preparation method of the polycaprolactone modified sodium-based bentonite includes the following steps: S1, polycaprolactone is dissolved in tetrahydrofuran at a mass-volume ratio of 10 g:100 mL to obtain a polycaprolactone mixed solution; S2, dry sodium bentonite with a particle size of 150-200 nm and silane coupling agent KH-550 are added to the polycaprolactone mixed solution, and ultrasonic treatment is carried out at 40℃ for 50min, the power is 300W, the frequency of ultrasonic is 40kHz, after ultrasonic treatment, the product is subjected to vacuum distillation, washing, drying, and polycaprolactone modified sodium bentonite is obtained; wherein, the mass ratio of sodium bentonite and polycaprolactone is 10:5, and the mass ratio of sodium bentonite and silane coupling agent is 10:1; The vulcanizing agent includes 2-mercaptobenzothiazole zinc salt and trimethylolpropane trimethacrylate in a mass ratio of 2:1; The auxiliary agent includes zinc stearate and hindered phenolic antioxidant in a mass ratio of 1:1.

[0055] The preparation method of the glove material is the same as that of embodiment 1, and only the substances are replaced, which will not be repeated here.

[0056] Effect example The glove materials prepared in embodiments 1-3 and comparative examples 1-3 are detected, and the specific detection indexes and performances are as follows: The tensile elongation at break is detected according to GB / T 528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber". The resilience is tested by tensile resilience method: prepare A-shaped dumbbell-shaped sample (gauge length 25mm), measure the initial gauge length L0; stretch the sample at a rate of 50mm / min to an elongation of 50%, unload after 10s, and measure the recovery gauge length L1 after 30s.

[0057] Calculate the resilience: resilience (%) = [(L1 L0) / (0.5L0)] x 100% (the closer the value is to 0, the better the resilience is).

[0058] Result determination: resilience ≤10% is high resilience (almost no permanent deformation), 10%-20% is medium, and >20% is poor resilience (easy to collapse).

[0059] The specific detection results are shown in Table 1: Table 1

[0060] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, any modification, equivalent replacement or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-elasticity, high-toughness glove material, characterized in that, The raw material components include the following parts by weight: 100 parts rubber matrix, 3-4 parts vulcanizing agent, 2-3 parts activator, 8-10 parts reinforcing agent, 5-7 parts toughening agent, 2-4 parts nano zinc oxide, 2-4 parts polyethylene glycol, and 3-5 parts additives. The rubber matrix includes brominated butyl rubber, acrylate rubber, and chlorosulfonated polyethylene rubber; The reinforcing agent includes polycaprolactone-modified sodium bentonite.

2. The high-elasticity, high-toughness glove material as described in claim 1, characterized in that, The preparation method of the polycaprolactone-modified sodium bentonite includes the following steps: S1. Dissolve polycaprolactone in tetrahydrofuran to obtain a polycaprolactone mixture; S2. Sodium-based bentonite and silane coupling agent are added to a polycaprolactone mixture for reaction to obtain the polycaprolactone-modified sodium-based bentonite.

3. The high-elasticity, high-toughness glove material as described in claim 2, characterized in that, In S1, the mass-to-volume ratio of polycaprolactone to tetrahydrofuran is 10 g: (90~110) mL; In S2, the particle size of the sodium-based bentonite is 150~300nm; In S2, the silane coupling agent is KH-550.

4. The high-elasticity, high-toughness glove material as described in claim 2, characterized in that, In S2, the mass ratio of sodium bentonite to polycaprolactone is 10:(3~5). In S2, the mass ratio of sodium-based bentonite to silane coupling agent is 10:(0.5~1). In S2, the reaction temperature is 40~50℃; In S2, the reaction time is 45-55 minutes.

5. The high-elasticity, high-toughness glove material as described in claim 2 or 4, characterized in that, In S2, the reaction is performed using ultrasonic treatment with a power of 300-400W and a frequency of 40kHz.

6. The high-elasticity, high-toughness glove material as described in claim 1, characterized in that, The rubber matrix comprises the following components by weight percentage: 40%~50% brominated butyl rubber, 25%~35% acrylate rubber, and 20%~30% chlorosulfonated polyethylene rubber.

7. The high-elasticity, high-toughness glove material as described in claim 1, characterized in that, The vulcanizing agent includes 2-mercaptobenzothiazole zinc salt and trimethylolpropane trimethacrylate; The toughening agent includes chlorinated polyethylene; The particle size of the nano zinc oxide is 20~50nm; The additives include zinc stearate and hindered phenolic antioxidants; The activator includes magnesium oxide.

8. The high-elasticity, high-toughness glove material as described in claim 1 or 7, characterized in that, The vulcanizing agent comprises 2-thiol benzothiazole zinc salt and trimethylolpropane trimethacrylate in a mass ratio of (1.5~2):

1.

9. The high-elasticity, high-toughness glove material as described in claim 1 or 7, characterized in that, The additives include zinc stearate and hindered phenolic antioxidants in a mass ratio of (1~1.5):(0.5~1).

10. A method for preparing a high-elasticity, high-toughness glove material according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: The weighed rubber matrix is ​​subjected to a first internal mixing to obtain a first-mixed rubber. Step 2: After the activator, nano zinc oxide, reinforcing agent, polyethylene glycol and additives are mixed evenly, they are added to the primary internal mixing rubber for a second internal mixing to obtain a secondary internal mixing mixture; Step 3: Add the toughening agent to the secondary intensive mixing mixture and perform a third intensive mixing to obtain a tertiary intensive mixing mixture; Step 4: Add the vulcanizing agent to the three-stage mixing mixture for a fourth mixing and vulcanization to obtain a high-elasticity and high-toughness glove material.

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