A method for manufacturing a glove with enhanced palm grip

Abstract

The present application belongs to the technical field of glove preparation, and particularly relates to a preparation method of a palm grip force enhanced glove, comprising the following steps: S1, glove core preparation and sleeve mold: braiding a glove core, and stretching and sleeving the glove core on a hand mold; S2, immersion coagulant treatment: immersing the glove core after the sleeve mold in a coagulant solution, and draining the excess solution on the surface after taking out; S3, preparation of grip force enhanced sizing material: mixing base glue, additives and modified anti-skid agent in proportion, stirring uniformly to form a uniformly dispersed sizing material system; when the sizing material system needs to pass through crosslinking to improve the performance, a vulcanizing agent also needs to be added. The present application improves the friction force and contact stability of the palm of the glove through the combined design of palm differentiation impregnation, palm strengthening and anti-skid treatment, and addition of modified anti-skid agent to the sizing material, and solves the core problems of insufficient palm grip force and easy skidding of the existing glove in dry state, wet state and oil pollution environment.

Description

Technical Field

[0001] This invention belongs to the field of glove manufacturing technology, and particularly relates to a method for manufacturing a glove with enhanced palm grip strength. Background Technology

[0002] Gloves, as hand protection and operational aids, are widely used in various scenarios such as industrial production, medical care, outdoor work, and daily housework. Their grip performance directly affects operational safety, accuracy, and work efficiency. Especially in complex environments such as dry, wet, or oily conditions, the palm of the glove must have a stable grip to prevent objects from slipping and reduce operational risks.

[0003] Currently, the production processes for mainstream protective gloves (such as nitrile gloves, latex gloves, and polyurethane gloves) are relatively mature. Their core processes typically include glove core weaving, impregnation with a coagulant, rubber impregnation, anti-slip treatment, drying, vulcanization (for some materials), and demolding. To improve grip performance, existing technologies often employ a single anti-slip method: spraying anti-slip powder (such as a mixture of salt and sodium sulfate) onto the glove surface, or enhancing the adhesiveness of the rubber layer by adjusting the basic rubber compound formulation.

[0004] However, existing technologies still have significant shortcomings: First, the anti-slip design lacks specificity, failing to focus on the palm as the core gripping area. The uniform distribution of the rubber layer thickness results in insufficient palm friction, while redundant rubber layers in non-palm areas affect wearing flexibility. Second, the anti-slip effect is limited and environmental adaptability is poor. Relying solely on anti-slip powder spraying leads to easy powder shedding, and grip strength decreases sharply in wet or oily environments, making it difficult to meet the needs of complex scenarios. Third, the synergy between the rubber layer's abrasion resistance and grip strength is poor. Existing rubber formulations lack dedicated anti-slip enhancement components, relying solely on conventional vulcanization to improve mechanical properties. This results in rapid rubber layer wear after long-term use and insufficient grip strength durability. Fourth, the process lacks versatility. In the production processes of gloves made of different materials (nitrile, latex, polyurethane), there is a lack of unified adaptation schemes for anti-slip treatment and rubber formulations, leading to inconsistent grip performance optimization effects for gloves made of different materials.

[0005] Therefore, in response to the problems of insufficient grip, poor environmental adaptability, limited abrasion resistance, and lack of process versatility in existing gloves, there is an urgent need to develop a glove manufacturing method that can precisely enhance palm grip through targeted structural design and formula optimization, while taking into account abrasion resistance and process compatibility, in order to meet the usage needs in multiple scenarios. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a method for preparing a glove with enhanced palm grip strength.

[0007] In view of this, the present invention proposes a method for preparing a glove with enhanced palm grip strength, comprising the following steps: S1, Glove core preparation and molding: Weaving the glove core and stretching the glove core onto the hand mold; S2, Coagulant Immersion Treatment: Immerse the molded glove core into the coagulant solution, remove it and drain off excess solution from the surface; S3, Preparation of grip-enhanced rubber compound: Mix the base rubber, additives and modified anti-slip agent in proportion and stir evenly to form a uniformly dispersed rubber compound system; when the rubber compound system needs to improve performance through cross-linking, a vulcanizing agent also needs to be added; S4, Differentiated impregnation of the palm area: The glove core treated with a coagulant is immersed in the adhesive material, wherein the impregnation time of the palm area is longer than that of other areas, so that the thickness of the adhesive layer on the palm is greater than that of other areas. S5, Palm reinforcement anti-slip treatment: Spray an anti-slip composition onto the palm area of ​​the dipped glove to embed the anti-slip composition into the palm rubber layer surface; S6, Segmented Drying: The adhesive layer is first dried at low temperature to remove volatile components, and then dried at high temperature to initially cure the adhesive layer. S7, vulcanization treatment: When the performance of the rubber system needs to be improved through cross-linking, the gloves after preliminary curing are vulcanized to make the rubber macromolecules cross-link to form a three-dimensional network structure. S8, Soaking and Secondary Drying: Soak the gloves in a washing tank to remove residual impurities, and then dry them to the preset moisture content; S9, Demolding and Inspection: Demold the gloves after they have cooled, and then inspect and screen the qualified products.

[0008] Furthermore, in step S1, the yarn of the glove core is a blend of polyester yarn, nylon yarn and anti-cut yarn, and the knitting needle type is 7 needle, 8 needle, 10 needle, 13 needle, 15 needle or 18 needle, 21 needle, 24 needle.

[0009] Furthermore, in step S2, the coagulant solution comprises the following parts by weight: 95-98 parts methanol, 1-3 parts calcium nitrate, and 0.5-1.5 parts glacial acetic acid, or 95-98 parts methanol and 2-4 parts calcium chloride; the immersion time in the coagulant is 0.1-30 seconds.

[0010] Furthermore, in step S3, the modified antislip agent is a composite of nano-silica and graphene, comprising the following parts by weight: 80-90 parts of nano-silica and 10-20 parts of graphene, with a nano-silica particle size of 20-50 nm; the modified antislip agent is added to the adhesive in an amount of 1.5-3 parts.

[0011] Furthermore, in step S3, the viscosity of the rubber compound is controlled to be 500-1500 mPa·s; the base rubber is one of nitrile rubber, natural latex or polyurethane base rubber; the vulcanizing agent is sulfur; and the additives include zinc oxide and antioxidants.

[0012] Furthermore, in step S4, the immersion time of the palm area is 10-20 seconds longer than that of other areas, and the thickness of the adhesive layer in the palm area is 0.1-0.3 mm thicker than that in other areas; the hand mold rotation speed is 30-50 r / min during the immersion process, the immersion environment is a closed space, and the temperature of the adhesive tank is controlled at 25-35℃.

[0013] Furthermore, in step S5, the anti-slip composition comprises the following raw materials in parts by weight: 60-70 parts anti-slip powder, 2-5 parts silane coupling agent, 1-3 parts dispersant, and 20-24 parts water.

[0014] Furthermore, the anti-slip powder is a mixture of salt and sodium sulfate, comprising the following parts by weight: 20-30 parts salt, 70-80 parts sodium sulfate, and the particle size of the anti-slip powder is 50-100 μm.

[0015] Furthermore, in step S5, the spraying amount of the anti-slip composition is 0.5-1.0 g / cm³. 2 After spraying, gently press the palm with an elastic roller at a pressure of 0.1-0.3MPa.

[0016] Furthermore, in step S6, the low-temperature drying temperature is 60-70℃ and the drying time is 20-30 minutes; during high-temperature drying, the drying temperature for nitrile gloves and latex gloves is 90±5℃ and the drying time is 30 minutes, while the drying temperature for polyurethane gloves is 100-120℃ and the drying time is 60-90 minutes.

[0017] The beneficial effects of this invention are: This invention improves the friction and contact stability of the palm of the glove by combining differentiated palm impregnation, enhanced anti-slip treatment of the palm, and the addition of modified anti-slip agents to the rubber material. This solves the core problem of insufficient palm grip and easy slippage of existing gloves in dry, wet and oily environments. This invention employs a design that allows for the addition of vulcanizing agents to the rubber compound system as needed, along with an independent vulcanization process. This design allows for compatibility with three mainstream glove base rubbers—nitrile rubber, natural latex, and polyurethane—without requiring adjustments to the core process. It is compatible with existing production lines, reduces process modification costs, and meets the production needs of gloves made of different materials. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will be clearly described below. Obviously, the described embodiments are only some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application are within the scope of protection of this application.

[0019] A method for preparing a glove with enhanced palm grip strength includes the following steps: S1, Glove core preparation and molding: Weaving the glove core and stretching the glove core onto the hand mold; S2, Coagulant Immersion Treatment: Immerse the molded glove core into the coagulant solution, remove it and drain off excess solution from the surface; S3, Preparation of grip-enhanced rubber compound: Mix the base rubber, additives and modified anti-slip agent in proportion and stir evenly to form a uniformly dispersed rubber compound system; when the rubber compound system needs to improve performance through cross-linking, a vulcanizing agent also needs to be added; S4, Differentiated impregnation of the palm area: The glove core treated with a coagulant is immersed in the adhesive material, wherein the impregnation time of the palm area is longer than that of other areas, so that the thickness of the adhesive layer on the palm is greater than that of other areas. S5, Palm reinforcement anti-slip treatment: Spray an anti-slip composition onto the palm area of ​​the dipped glove to embed the anti-slip composition into the palm rubber layer surface; S6, Segmented Drying: The adhesive layer is first dried at low temperature to remove volatile components, and then dried at high temperature to initially cure the adhesive layer. S7, vulcanization treatment: When the performance of the rubber system needs to be improved through cross-linking, the gloves after preliminary curing are vulcanized to make the rubber macromolecules cross-link to form a three-dimensional network structure. S8, Soaking and Secondary Drying: Soak the gloves in a washing tank to remove residual impurities, and then dry them to the preset moisture content; S9, Demolding and Inspection: Demold the gloves after they have cooled, and then inspect and screen the qualified products.

[0020] This invention improves the friction and contact stability of the palm (the core gripping area) of the glove by combining differentiated palm impregnation, enhanced anti-slip treatment of the palm, and the addition of modified anti-slip agents to the rubber material. This solves the core problem of insufficient palm grip and easy slippage in existing gloves under dry, wet and oily conditions. This invention employs a design that allows for the addition of vulcanizing agents to the rubber compound system as needed, along with an independent vulcanization process. This design allows for compatibility with three mainstream glove base rubbers—nitrile rubber, natural latex, and polyurethane—without requiring adjustments to the core process. It is compatible with existing production lines, reduces process modification costs, and meets the production needs of gloves made of different materials.

[0021] In the example of this application, in step S1, the yarn of the glove core is a blend of polyester yarn, nylon yarn and anti-cut yarn, and the knitting needle type is 7 needle, 8 needle, 10 needle, 13 needle, 15 needle or 18 needle, 21 needle or 24 needle.

[0022] As a preferred example of the present invention, the blended yarn of polyester yarn, nylon yarn and cut-resistant yarn has high strength, flexibility and cut-resistant properties, which solves the problem of insufficient strength or poor flexibility of single yarn, provides stable support for subsequent impregnation and gripping, and avoids the deformation of the glove core from affecting the gripping accuracy. The structural stability of the blended yarn is compatible with various needle types such as 7-needle, 8-needle, and 10-needle, and can be knitted into glove cores with different densities. This ensures that the glove core fits tightly with the hand mold and the adhesive layer without wrinkles or gaps, preventing the adhesive layer from falling off or uneven stress in some areas after dipping, thus improving the feel and stability during the gripping process. The addition of anti-cutting yarn gives the gloves both gripping and anti-slip functions as well as anti-cutting features. With the thickness adjustment corresponding to different needle types, they can be adapted to various scenarios such as industrial operations and outdoor work, thus broadening the application range of the product.

[0023] In the example of this application, in step S2, the coagulant solution comprises the following parts by weight: 95-98 parts methanol, 1-3 parts calcium nitrate, and 0.5-1.5 parts glacial acetic acid, or 95-98 parts methanol and 2-4 parts calcium chloride; the immersion time in the coagulant is 0.1-30 seconds.

[0024] As a preferred example of this invention, a formulation with methanol as the main component and supplemented with calcium nitrate / calcium chloride + glacial acetic acid further enhances the anti-permeability performance of the coagulant, completely avoiding product defects caused by the adhesive material penetrating the glove core, ensuring that the adhesive layer only adheres to the surface of the glove core, and guaranteeing the efficiency of the adhesive layer during gripping; the 10-30 second immersion time is matched with the formulation concentration, allowing the coagulant to form a uniform film on the surface of the glove core, preventing anti-permeability failure due to insufficient immersion and preventing coagulant accumulation due to excessive immersion, providing a uniform and stable base for subsequent dipping processes, and improving the uniformity of adhesive layer adhesion; the formulation supplements methanol with a small amount of functional components, ensuring the anti-permeability effect while reducing unnecessary component waste and volatilization, reducing methanol exhaust gas generation, and improving the environmental friendliness of the process.

[0025] In the example of this application, in step S3, the modified antislip agent is a composite of nano-silica and graphene, comprising the following parts by weight: 80-90 parts of nano-silica and 10-20 parts of graphene, with the nano-silica having a particle size of 20-50 nm; the modified antislip agent is added to the adhesive in an amount of 1.5-3 parts.

[0026] As a preferred example of the present invention, the high hardness and rough surface of nano-silica (80-90 parts) provide basic anti-slip performance, while the high conductivity and mechanical reinforcing effect of graphene (10-20 parts) enhance the toughness of the adhesive. The composite formed by the two not only enhances the anti-slip effect of the adhesive itself, but also avoids the problem of adhesive layer embrittlement caused by a single anti-slip agent. The 20-50nm nano-silica particle size is compatible with the adhesive system, and the addition amount is controlled at 1.5-3 parts to ensure that the modified anti-slip agent is uniformly dispersed in the adhesive without agglomeration. This ensures that the anti-slip effect is consistent in every area of ​​the glove's palm, without compromising the flexibility and adhesion of the adhesive. The addition of the modified anti-slip agent significantly improves the wear resistance of the adhesive layer, reduces the attenuation of gripping force caused by wear of the adhesive layer during gripping, and enables the glove to maintain a stable anti-slip effect after long-term use, thus extending the product's service life.

[0027] In the example of this application, in step S3, the viscosity of the rubber compound is controlled to be 500-1500 mPa·s; the base rubber is one of nitrile rubber, natural latex or polyurethane base rubber; the vulcanizing agent is sulfur; and the additives include zinc oxide and antioxidants.

[0028] As a preferred example of the present invention, a viscosity range of 500-1500 mPa·s is adapted to the dipping process, ensuring that the rubber compound has sufficient fluidity to adhere evenly to the glove core surface, while avoiding excessively low viscosity leading to an overly thin rubber layer or excessively high viscosity leading to rubber layer accumulation, thus ensuring that the thickness of the thickened rubber layer in the palm is controllable; sulfur, as a vulcanizing agent, enables the nitrile / latex compound to fully crosslink, zinc oxide improves the crosslinking efficiency, and antioxidants delay the aging of the rubber compound. The synergistic effect of these three agents gives the rubber layer high strength, high elasticity, and anti-aging properties, providing lasting performance support for grip strength; the compatibility optimization of additives with the base rubber and modified antislip agents avoids component conflicts that lead to rubber compound deterioration or rubber layer defects, improves process stability during production, and reduces the defect rate.

[0029] In the example of this application, in step S4, the immersion time of the palm area is 10-20 seconds longer than that of other areas, and the thickness of the palm adhesive layer is 0.1-0.3 mm thicker than that of other areas; the hand mold rotation speed is 30-50 r / min during the immersion process, the immersion environment is a closed space, and the temperature of the adhesive tank is controlled at 25-35℃.

[0030] As a preferred example of the present invention, the palm dip time is extended by 10-20 seconds and the adhesive layer thickness is increased by 0.1-0.3mm, precisely increasing the contact area and friction of the adhesive layer in the core gripping area, while avoiding the problem of bulky wearing caused by excessively thick adhesive layers in non-palm areas, achieving a balance between "enhanced grip and comfortable wearing"; the hand mold rotation speed of 30-50r / min ensures that the adhesive material evenly covers the glove core, avoiding localized missing or accumulated adhesive; the adhesive bath temperature of 25-35℃ ensures stable adhesive flow, and the closed environment reduces the volatilization of exhaust gases such as methanol, which not only improves the uniformity and adhesion of the adhesive layer, but also improves the production environment and reduces environmental pressure; the quantitative control of various parameters ensures that the thickness and uniformity of the palm adhesive layer of different batches of gloves are consistent, avoiding differences in gripping force caused by process fluctuations and improving product quality stability.

[0031] In the example of this application, in step S5, the anti-slip composition comprises the following parts by weight: 60-70 parts of anti-slip powder, 2-5 parts of silane coupling agent, 1-3 parts of dispersant, and 20-24 parts of water.

[0032] As a preferred example of the present invention, 60-70 parts of anti-slip powder are the core anti-slip component, 2-5 parts of silane coupling agent enhance the adhesion between the anti-slip powder and the adhesive layer, 1-3 parts of dispersant ensure that the anti-slip powder is uniformly dispersed in the composition, and 20-24 parts of water adjust the fluidity of the composition. These four components work synergistically to ensure that the anti-slip composition, after spraying, can evenly cover the palm and firmly embed itself in the adhesive layer, preventing it from falling off during use. The controlled water ratio ensures that the anti-slip composition has suitable fluidity, facilitating precise application to the palm area via a spraying device, avoiding spray blockage due to an overly thick composition or uneven coverage due to an overly thin composition, thus improving process operability. The appropriate proportions of each component in the formula ensure both immediate anti-slip effect and, through the binding effect of the silane coupling agent, extend the adhesion life of the anti-slip powder, ensuring that the gloves maintain stable grip even after long-term use. In the example of this application, the anti-slip powder is a mixture of salt and sodium sulfate, comprising the following parts by weight: 20-30 parts salt, 70-80 parts sodium sulfate, and the particle size of the anti-slip powder is 50-100 μm.

[0033] As a preferred example of the present invention, the mixture of salt (20-30 parts) and sodium sulfate (70-80 parts) has both hygroscopic and rough surface properties, providing stable friction in both dry and wet environments, solving the problem of single anti-slip powder failing to prevent slipping under specific conditions; the 50-100μm particle size design ensures that the anti-slip powder can form effective anti-slip protrusions without causing a foreign body sensation due to excessive particle size, achieving a balance of "high anti-slip + high comfort"; both salt and sodium sulfate are widely available and inexpensive raw materials, reducing the cost of raw materials for production; both are chemically stable and will not react harmfully with adhesives or other components, nor will they release harmful substances during use, improving the environmental friendliness of the product.

[0034] In the example of this application, in step S5, the spraying amount of the anti-slip composition is 0.5-1.0 g / cm³. 2 After spraying, gently press the palm with an elastic roller at a pressure of 0.1-0.3MPa.

[0035] As a preferred example of the present invention, 0.5-1.0 g / cm³ 2 The spray amount ensures sufficient coverage of anti-slip powder on the palm, preventing both insufficient spraying leading to poor anti-slip effect and excessive spraying causing powder buildup and detachment. Light pressure from the elastic roller at 0.1-0.3 MPa evenly embeds the anti-slip powder into the adhesive layer surface, enhancing the bond between the powder and the adhesive layer while preventing damage caused by excessive pressure. This creates a stable anti-slip structure, improving grip stability. The rolling process smooths out any localized protrusions that may appear after spraying, resulting in a palm adhesive layer surface that is both rough and relatively flat, preventing excessive protrusions from affecting grip feel and operational precision.

[0036] In the example of this application, in step S6, the low-temperature drying temperature is 60-70℃ and the drying time is 20-30 minutes; during high-temperature drying, the drying temperature for nitrile gloves and latex gloves is 90±5℃ and the drying time is 30 minutes, while the drying temperature for polyurethane gloves is 100-120℃ and the drying time is 60-90 minutes.

[0037] As a preferred example of this invention, low-temperature drying at 60-70℃ for 20-30 minutes can effectively remove volatile components such as methanol and acetone from the adhesive and coagulant, avoiding residual components from affecting the feel of the gloves or causing odors in the usage environment due to volatilization, thus improving product safety and comfort. Differentiated high-temperature drying parameters are designed for different base adhesives (nitrile / latex 90±5℃ / 30 minutes, polyurethane 100-120℃ / 60-90 minutes) to ensure that all types of adhesive layers can be fully initially cured, ensuring the strength of the adhesive layer and laying the foundation for subsequent vulcanization (nitrile / latex) or final molding (polyurethane). The optimization of drying temperature and time, while ensuring the curing effect, avoids energy waste and adhesive layer aging caused by overheating, improving production efficiency while reducing production costs, and balancing economy and product performance.

[0038] To verify the grip strength and abrasion resistance of the palm grip-enhancing glove described in this invention under dry, wet, and oily environments, the following comparison of the performance differences between multiple embodiments and existing gloves demonstrates that the overall performance of the glove of this invention is superior to that of the prior art.

[0039] Experimental sample preparation: Three key parameters affecting grip strength in this invention were selected, and three groups of experimental samples (denoted as S1, S2, and S3) were set according to "minimum value, median value, and maximum value". At the same time, a control group sample (denoted as CK) was prepared according to existing technology. All samples used nitrile rubber as the base rubber (the mainstream material in existing technology, with strong representativeness), and other non-critical process parameters (such as the ratio of glove core yarn, coagulant formula, drying temperature, etc.) were kept consistent to ensure the uniqueness of variables.

[0040] Core parameter settings: S1: Modified antislip agent addition amount 1.5 parts by weight, palm dip extension time 10 seconds, antislip composition spraying amount 0.5 g / cm³ 2 , is the minimum combination of wood-based formulas.

[0041] S2: Modified antislip agent addition amount 2.25 parts by weight, palm dip extension time 15 seconds, antislip composition spraying amount 0.75 g / cm³ 2 , which is the intermediate value combination of the formulation of this invention.

[0042] S3: Modified anti-slip agent addition amount 3.0 parts by weight, palm dip extension time 20 seconds, anti-slip composition spraying amount 1.0 g / cm³ 2 , which represents the maximum combination of the formulas of this invention.

[0043] CK: Modified antislip agent addition 0 (no modified antislip agent, according to original process), palm dip extension time 0 (no palm dip differentiation), antislip composition spraying amount 0.3g / cm 2 (Existing conventional spraying amount), prepared according to the original nitrile glove process (no modified antislip agent, no palm thickening and impregnation, only spraying pure salt-sodium sulfate antislip powder).

[0044] Sample preparation process: 1. All samples were made from a blended yarn of “55% polyester filament + 35% nylon filament + 10% anti-cut yarn”. The glove core was knitted on a 7-needle computer knitting machine. After molding, the glove was immersed in a coagulant (97 parts methanol + 2 parts calcium nitrate + 1 part glacial acetic acid) for 30 seconds.

[0045] 2. The samples of this invention (S1 / S2 / S3) are prepared according to the corresponding parameters to form a grip-enhancing rubber compound (96 parts of nitrile rubber + 0.8 parts of sulfur + 1.5 parts of zinc oxide + 1 part of antioxidant + modified antislip agent, with the viscosity controlled at 1000 mPa·s); the prior art sample (CK) rubber compound does not contain modified antislip agent, and the viscosity is the same as 1000 mPa·s.

[0046] 3. After impregnation, the palm of the sample of the present invention is sprayed with an anti-slip composition (65 parts anti-slip powder + 3 parts silane coupling agent + 2 parts dispersant + 20 parts water, the anti-slip powder is 25 parts salt + 75 parts sodium sulfate, particle size 80μm); CK is sprayed with pure salt-sodium sulfate anti-slip powder (20% salt + 80% sodium sulfate).

[0047] 4. Segmented drying (low temperature 65℃ / 25 minutes, high temperature 90℃ / 30 minutes), vulcanization treatment (120℃ / 30 minutes, humidity 70%), soaking and washing (40℃ / 15 minutes), secondary drying (95℃ / 25 minutes), and screening of defect-free samples after demolding for later use.

[0048] Experimental instruments and materials: Electronic tensile testing machine: measuring range 0-500N, accuracy ±0.1N, testing speed 50mm / min.

[0049] Martindale abrasion tester: pressure 4.9N, friction speed 20 times / min, friction medium is standard cotton cloth (GB / T21196.3-2007).

[0050] Standard test plates: stainless steel plate (roughness Ra=0.8μm), solid wood board (oak, polished), PVC plastic board.

[0051] Auxiliary materials: distilled water (for wet testing), industrial machine oil (model 40#, for oily environment testing).

[0052] Sample clamp: Fits the glove size and can fix the palm area of ​​the glove to fit the test plate.

[0053] Experimental methods: Grip strength test: 1. Test principle: The maximum static friction between the palm area of ​​the glove and the standard test plate is tested by a tensile testing machine. Static friction is used to characterize grip strength (the greater the static friction, the stronger the grip).

[0054] 2. Test conditions: Dry state: the test panel surface is dry, room temperature 25℃, humidity 50%±5%; Wet state: the test panel surface is evenly sprayed with distilled water (with no obvious water droplet residue), room temperature 25℃; Oily state: the test panel surface is evenly coated with industrial machine oil (thickness 0.1mm), room temperature 25℃.

[0055] 3. Testing Procedure: Secure the glove to the upper clamp of the tensile testing machine, and fix the test plate to the lower clamp, ensuring that the palm of the glove is in complete contact with the test plate (contact area 10cm²). 2 Start the tensile testing machine and stretch it upwards at a speed of 50 mm / min. Record the maximum static friction force. Test each sample 5 times and take the average value (remove outliers).

[0056] Abrasion resistance test: 1. Test principle: The test uses a Martindale tester to simulate the frictional wear of gloves during gripping, and tests the number of abrasion cycles and the retention rate of gripping force after wear.

[0057] 2. Test Procedure: Fix the sample on the abrasion machine fixture, bring it into contact with the friction medium (cotton cloth), apply a pressure of 4.9N, and start the machine to perform friction; after every 100 friction cycles, remove the sample and test the dry gripping force (stainless steel plate), and record the gripping force value; when the gripping force drops to 50% of the initial value, stop the test and record the total number of abrasion cycles; if the gripping force is still ≥ 50% of the initial value after 500 friction cycles, record the gripping force retention rate at 500 cycles.

[0058] Data processing: All experimental data were analyzed using Excel to calculate the mean ($\bar{x}$) and standard deviation (S). One-way ANOVA was performed using SPSS 26.0 to test the significance of differences between samples (P<0.05 was considered significant, and P<0.01 was considered highly significant).

[0059] Experimental Results and Analysis: Grip strength test results: 1. Dry environment: S1: Stainless steel plate 48.6N, solid wood plate 52.3N, PVC plastic plate 45.8N, average 48.9N, standard deviation 2.71, the difference from CK is +12.4N, the difference is extremely significant (P<0.01).

[0060] S2: Stainless steel plate 56.8N, solid wood plate 60.5N, PVC plastic plate 53.2N, mean 56.8N, standard deviation 3.15, the difference from CK is +20.3N, the difference is extremely significant (P<0.01).

[0061] S3: Stainless steel plate 63.5N, solid wood plate 67.2N, PVC plastic plate 60.1N, mean 63.6N, standard deviation 3.42, the difference from CK is +27.1N, the difference is extremely significant (P<0.01).

[0062] CK (Prior Technology): Stainless steel plate 36.2N, solid wood plate 40.1N, PVC plastic plate 33.4N, average 36.5N, standard deviation 3.08.

[0063] Humid environment: S1: Stainless steel plate 39.5N, solid wood plate 43.2N, PVC plastic plate 37.1N, mean 39.9N, standard deviation 2.58, the difference from CK is +10.3N, the difference is extremely significant (P<0.01).

[0064] S2: Stainless steel plate 47.8N, solid wood plate 51.5N, PVC plastic plate 44.6N, average 48.0N, standard deviation 2.93, the difference from CK is +18.4N, the difference is extremely significant (P<0.01).

[0065] S3: Stainless steel plate 55.2N, solid wood plate 59.3N, PVC plastic plate 52.4N, mean 55.6N, standard deviation 3.11, the difference from CK is +25.7N, the difference is extremely significant (P<0.01).

[0066] CK: Stainless steel plate 29.6N, solid wood plate 32.9N, PVC plastic plate 26.8N, average 29.6N, standard deviation 2.85.

[0067] Oily environment: S1: Stainless steel plate 32.8N, solid wood plate 36.5N, PVC plastic plate 30.2N, mean 33.2N, standard deviation 2.64, the difference from CK is +8.7N, the difference is extremely significant (P<0.01).

[0068] S2: Stainless steel plate 41.3N, solid wood plate 45.1N, PVC plastic plate 38.6N, average 41.7N, standard deviation 2.89, the difference from CK is +17.2N, the difference is extremely significant (P<0.01).

[0069] S3: Stainless steel plate 48.6N, solid wood plate 52.4N, PVC plastic plate 46.3N, average 49.1N, standard deviation 3.05, the difference from CK is +24.6N, the difference is extremely significant (P<0.01).

[0070] CK: Stainless steel plate 24.5N, solid wood plate 27.8N, PVC plastic plate 21.5N, average 24.5N, standard deviation 2.73.

[0071] Abrasion resistance test results: S1: Initial dry grip strength 48.9N, grip strength after 100 abrasion cycles 47.2N, grip strength after 300 abrasion cycles 42.5N, grip strength after 500 abrasion cycles 39.8N, grip strength retention rate 81.4%, number of abrasion cycles to 50% of initial value >500.

[0072] S2: Initial dry grip strength 56.8N, grip strength after 100 abrasions 55.3N, grip strength after 300 abrasions 50.1N, grip strength after 500 abrasions 47.6N, grip strength retention rate 83.8%, number of abrasions to 50% of initial value >500 times.

[0073] S3: Initial dry grip strength 63.6N, grip strength after 100 abrasions 62.1N, grip strength after 300 abrasions 57.8N, grip strength after 500 abrasions 55.2N, grip strength retention rate 86.8%, number of abrasions to 50% of initial value >500 times.

[0074] CK: Initial dry grip strength 36.5N, grip strength after 100 abrasion cycles 32.8N, grip strength after 300 abrasion cycles 25.7N, grip strength after 500 abrasion cycles 18.3N, grip strength retention rate 50.1%, number of abrasion cycles to 50% of initial value 480.

[0075] Results analysis: The present invention exhibits significant advantages in grip strength: In a dry environment, the average grip strength of gloves S1, S2, and S3 of the present invention is improved by 33.9%, 55.6%, and 74.2% respectively compared to the prior art (CK); in a wet environment, the improvements are 34.8%, 62.2%, and 87.8% respectively; and in an oily environment (the most severe scenario), the improvements are 35.9%, 70.2%, and 99.6% respectively, with all differences reaching a highly significant level (P<0.01). The core reason is that the rough surface of the modified anti-slip agent (nano-silica + graphene) enhances friction, the differentiated impregnation of the palm thickens the adhesive layer to expand the contact area, and the anti-slip composition is embedded in the adhesive layer to form a stable anti-slip structure. The synergistic effect of these three factors far exceeds the effect of simply spraying anti-slip powder in the prior art.

[0076] This invention offers superior abrasion resistance: Existing gloves experience a decrease in grip strength to 50% of their initial value after 480 cycles of friction, while the gloves of this invention retain 81.4% of their grip strength after 500 cycles, even with the minimum formulation, and 86.8% with the maximum formulation. This demonstrates that the adhesive layer of this invention exhibits stronger abrasion resistance and greater grip strength durability. The core reason is the synergistic effect of the modified anti-slip agent and the adhesive compound, which enhances the hardness and toughness of the adhesive layer. The thickened adhesive layer at the palm reduces the wear rate and extends the glove's lifespan.

[0077] The formulation of this invention has good stability: the performance of the gloves of this invention under the "minimum value" formulation (S1) is significantly better than that of the prior art, and the performance of the intermediate and maximum value formulations continues to improve, indicating that the technical effect of "enhanced grip" can be achieved within the parameter range defined by this invention, and the process compatibility and formulation stability are strong.

[0078] In summary, the palm grip enhancement glove of this invention, through a synergistic design of "modified anti-slip agent addition + differentiated palm impregnation + enhanced palm anti-slip treatment," exhibits significantly superior grip and abrasion resistance compared to existing technologies in dry, wet, and oily environments. Whether considering the minimum, intermediate, or maximum values ​​of the formulation parameters, its overall performance surpasses that of existing gloves. The maximum formulation, in oily conditions, demonstrates nearly double the grip strength and over 80% improvement in abrasion resistance compared to existing technologies, fully proving the technical advantages and practicality of this invention.

[0079] The embodiments of this application have been described above. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for preparing a glove with enhanced palm grip strength, characterized in that, Includes the following steps: S1, Glove core preparation and molding: Weaving the glove core and stretching the glove core onto the hand mold; S2, Coagulant Immersion Treatment: Immerse the molded glove core into the coagulant solution, remove it and drain off excess solution from the surface; S3, Preparation of grip-enhanced rubber compound: Mix the base rubber, additives and modified anti-slip agent in proportion and stir evenly to form a uniformly dispersed rubber compound system; when the rubber compound system needs to improve performance through cross-linking, a vulcanizing agent also needs to be added; S4, Differentiated impregnation of the palm area: The glove core treated with a coagulant is immersed in the adhesive material, wherein the impregnation time of the palm area is longer than that of other areas, so that the thickness of the adhesive layer on the palm is greater than that of other areas. S5, Palm reinforcement anti-slip treatment: Spray an anti-slip composition onto the palm area of ​​the dipped glove to embed the anti-slip composition into the palm rubber layer surface; S6, Segmented Drying: The adhesive layer is first dried at low temperature to remove volatile components, and then dried at high temperature to initially cure the adhesive layer. S7, vulcanization treatment: When the performance of the rubber system needs to be improved through cross-linking, the gloves after preliminary curing are vulcanized to make the rubber macromolecules cross-link to form a three-dimensional network structure. S8, Soaking and Secondary Drying: Soak the gloves in a washing tank to remove residual impurities, and then dry them to the preset moisture content; S9, Demolding and Inspection: Demold the gloves after they have cooled, and then inspect and screen the qualified products.

2. The method for preparing a palm grip enhancement glove according to claim 1, characterized in that, In step S1, the yarn of the glove core is a blend of polyester yarn, nylon yarn and anti-cut yarn, and the knitting needle type is 7 needle, 8 needle, 10 needle, 13 needle, 15 needle or 18 needle, 21 needle or 24 needle.

3. The method for preparing a glove with enhanced palm grip according to claim 2, characterized in that, In step S2, the coagulant solution comprises the following parts by weight: 95-98 parts methanol, 1-3 parts calcium nitrate, and 0.5-1.5 parts glacial acetic acid, or 95-98 parts methanol and 2-4 parts calcium chloride; the immersion time in the coagulant is 0.1-30 seconds.

4. The method for preparing a palm grip enhancement glove according to claim 3, characterized in that, In step S3, the modified antislip agent is a composite of nano-silica and graphene, comprising the following parts by weight: 80-90 parts of nano-silica and 10-20 parts of graphene, with a nano-silica particle size of 20-50 nm; the modified antislip agent is added to the adhesive in an amount of 1.5-3 parts.

5. The method for preparing a palm grip enhancement glove according to claim 4, characterized in that, In step S3, the viscosity of the rubber compound is controlled to be 500-1500 mPa·s; the base rubber is one of nitrile rubber, natural latex or polyurethane base rubber; the vulcanizing agent is sulfur; and the additives include zinc oxide and antioxidants.

6. A method for preparing a palm grip enhancement glove according to claim 5, characterized in that, In step S4, the immersion time of the palm area is 10-20 seconds longer than that of other areas, and the thickness of the adhesive layer in the palm area is 0.1-0.3 mm thicker than that in other areas. During the immersion process, the hand mold rotation speed is 30-50 r / min, the immersion environment is a closed space, and the temperature of the adhesive tank is controlled at 25-35℃.

7. A method for preparing a palm grip enhancement glove according to claim 6, characterized in that, In step S5, the anti-slip composition comprises the following parts by weight: 60-70 parts anti-slip powder, 2-5 parts silane coupling agent, 1-3 parts dispersant, and 20-24 parts water.

8. A method for preparing a palm grip enhancement glove according to claim 7, characterized in that, The anti-slip powder is a mixture of salt and sodium sulfate, comprising the following parts by weight: 20-30 parts salt, 70-80 parts sodium sulfate, and the particle size of the anti-slip powder is 50-100μm.

9. A method for preparing a palm grip enhancement glove according to claim 8, characterized in that, In step S5, the spraying amount of the anti-slip composition is 0.5-1.0 g / cm³. 2 After spraying, gently press the palm with an elastic roller at a pressure of 0.1-0.3MPa.

10. A method for preparing a palm grip enhancement glove according to claim 1, characterized in that, In step S6, the low-temperature drying temperature is 60-70℃ and the drying time is 20-30 minutes; during high-temperature drying, the drying temperature for nitrile gloves and latex gloves is 90±5℃ and the drying time is 30 minutes, while the drying temperature for polyurethane gloves is 100-120℃ and the drying time is 60-90 minutes.