White high-transparency and high-durability butyronitrile glove and manufacturing method thereof

Abstract

The invention discloses a white high-transparency and high-durability butyronitrile glove and a manufacturing method thereof, and relates to the technical field of glove manufacturing. The glove is prepared from the following raw materials in parts by weight: 100 parts of nitrile rubber latex, 1.0-2.0 parts of a stabilizer, 0.8-1.5 parts of a vulcanizing agent, 1.0-2.5 parts of an active agent, 0.3-1.4 parts of an accelerant, 0.0-2.0 parts of an anti-aging agent, 0.0-3.0 parts of a titanium dioxide agent and 45-55 parts of soft water. The coagulant comprises the following raw materials in parts by weight: 10.0-25.0 parts of calcium nitrate, 1.0-2.5 parts of a separant, 0.1 part of a wetting agent and 2.0-5.0 parts of soft water. The invention further provides a preparation method, and the prepared white high-transparency high-durability butyronitrile gloves are more comfortable and more durable than common butyronitrile gloves, and are more pleasant in mood when being used. Specific example data prove that compared with common butyronitrile gloves which can be broken after being worn for 1-4 hours, the high-transparency and high-durability butyronitrile gloves are still not damaged after being worn for 12 hours.

Description

Technical Field

[0001] The invention belongs to the technical field of glove manufacturing, and in particular relates to a white, highly transparent and highly durable nitrile glove and a manufacturing method thereof. Background Art

[0002] Disposable rubber gloves are widely used in medical examination, health protection, food industry and other fields. They are easy to use and disposable. Gloves used for medical purposes can be further divided into latex gloves with natural rubber latex as the main raw material, nitrile gloves with nitrile rubber latex as the main raw material, PVC gloves with polyvinyl chloride paste resin and plasticizer as the main raw materials, etc. Among them, nitrile gloves are reasonably priced, and their oil and solvent resistance far exceeds that of latex gloves and PVC gloves, so they are widely used.

[0003] Existing nitrile gloves have the problem of poor wear resistance, especially when the elongation of the gloves is high, such as gloves with an elongation of more than 600%, which will be damaged if worn continuously for no more than 60 minutes. Many nitrile gloves will develop cracks and holes after being worn continuously and used normally for more than 90 minutes, especially in the base of the thumb, between fingers and other places that are subjected to more force during daily use. Not only does it require users to change gloves frequently, which invisibly increases costs, but also because minor damage during use is not easy to detect, there is a potential risk of losing the protective effect. In view of this, the present invention proposes a white, highly transparent and highly durable nitrile glove and a method for making the same. Summary of the invention

[0004] The object of the present invention is to provide a white, highly transparent and highly durable nitrile glove and a method for making the same, so as to solve the problem of the poor wear resistance of the nitrile rubber gloves in the prior art mentioned in the above background technology.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A white, highly transparent and highly durable nitrile glove, wherein the raw materials for preparing the glove include nitrile rubber latex and a coagulant;

[0007] The nitrile rubber latex comprises the following raw material formula in parts by weight: 100 parts of nitrile rubber latex, 1.0-2.0 parts of stabilizer, 0.8-1.5 parts of vulcanizer, 1.0-2.5 parts of activator, 0.3-1.4 parts of accelerator, 0.0-2.0 parts of antioxidant, 0.0-3.0 parts of titanium dioxide and 45-55 parts of soft water;

[0008] The coagulant comprises the following raw material formula in parts by weight: 10.0 to 25.0 parts of calcium nitrate, 1.0 to 2.5 parts of a separator, 0.1 parts of a wetting agent and 2.0 to 5.0 parts of soft water.

[0009] Preferably, the preparation method of the nitrile rubber latex is as follows:

[0010] A1. Put the nitrile rubber latex into a stirring barrel, start stirring, slowly add stabilizer, vulcanizer, activator, accelerator and soft water under stirring, and stir for 24 hours;

[0011] A2. Continue stirring. Under stirring, further add diluted titanium dioxide and soft water to make the solid content of the mixed solution in the stirring barrel reach 20-35%. Use a 200-mesh sieve to filter and transfer the mixed solution in the stirring barrel. After filtration, let it stand for 24-48 hours to defoam the prepared mixed nitrile latex for standby use.

[0012] Preferably, the preparation method of the coagulant is as follows:

[0013] Place calcium nitrate in a mixing bucket filled with soft water and start stirring. After the calcium nitrate is fully dissolved, add a release agent and a wetting agent, stir and defoam for 24 to 48 hours, and set aside.

[0014] A method for making white, highly transparent and highly durable nitrile gloves comprises the following steps:

[0015] S1. Mold washing: clean the hand mold for glove preparation, and then put it into an electric constant temperature drying oven for drying until the moisture on the surface of the hand mold is completely dry;

[0016] S2, dipping in coagulant: dipping the hand model processed in S1 into a coagulant preheated to 50-60 degrees Celsius until the coagulant liquid level slightly exceeds the preset mold line on the top of the hand model;

[0017] S3, coagulant drying: putting the hand model treated in S2 into an electric constant temperature drying box for drying;

[0018] S4, first dipping: put the prepared nitrile latex into a stirring barrel for stirring. After the stirring is completed, remove the stirring blade from the nitrile latex to remove the rubber and bubbles on the surface of the latex. Then slowly put the hand model processed in S3 into the latex until the latex liquid surface is immersed in the preset mold line on the top of the hand model and keep it for 5 to 10 seconds. Then lift the hand model, turn the hand model over continuously to make the latex flow evenly, and then let the hand model with the film stand to dry;

[0019] S5, second dipping: after the first layer of latex is completely solidified, the hand model covered with the first layer of latex is immersed in the mixing barrel again and kept for 5 to 10 seconds, then the hand model is lifted up, and the hand model is turned over continuously to make the latex flow evenly, and then left to dry;

[0020] S6, shaping: putting the hand model processed in S5 into an electric constant temperature drying oven for drying, so that the latex on the surface of the hand model is completely shaped;

[0021] S7, pre-leaching: immerse the shaped hand model in clean hot water at 60-70 degrees Celsius for 30-40 seconds, lift the hand model, and drain the water on the surface of the hand model;

[0022] S8, curling: after the leaching is completed, the top of the latex on the surface of the hand mold is manually curled;

[0023] S9, vulcanization and drying: putting the hand model treated in S8 into an electric constant temperature drying box for vulcanization and drying;

[0024] S10, chlorine treatment: After the vulcanization and drying is completed, the hand mold is cooled to room temperature, then immersed in chlorine water for 20 to 25 seconds and taken out;

[0025] S11, neutralization: immerse the hand model treated with chlorine for 20 to 25 seconds and take it out;

[0026] S12, post-leaching: After the neutralization treatment is completed, the hand mold is immersed in hot water at a temperature of 60 to 70 degrees Celsius for 60 to 80 seconds and then taken out;

[0027] S13, post-drying: putting the hand model processed in S12 into the electric constant temperature drying box again for drying;

[0028] S14, demoulding: taking out the dried hand mold and manually demoulding the latex on the surface of the hand mold;

[0029] S15. Inspection: Inspect the appearance of the gloves taken off, select those that do not meet the appearance requirements, and pack and store the qualified ones.

[0030] Preferably, the drying temperature in S1 is 80-90 degrees Celsius, and the drying is stopped when the hand mold reaches 50-60 degrees Celsius;

[0031] In S3, the drying temperature is 80 to 90 degrees Celsius and the drying time is 5 to 10 minutes;

[0032] In S6, the drying temperature is 80 to 100 degrees Celsius and the drying time is 5 to 10 minutes;

[0033] In S13, the drying temperature is 90 to 100 degrees Celsius, and the drying time is 10 to 15 minutes.

[0034] Preferably, in the early stage of drying and vulcanization in S9, the temperature is controlled at 80-90 degrees Celsius, and the drying time is 20-25 minutes; in the later stage of drying and vulcanization, the temperature is raised to 120-130 degrees Celsius, and the drying time is 25-30 minutes.

[0035] Preferably, the TDS of the hot water used in the pre-leaching and post-leaching is ≤1000.

[0036] Compared with the prior art, the present invention provides a white, highly transparent and highly durable nitrile glove and a manufacturing method thereof, which has the following beneficial effects:

[0037] The present invention provides a white, highly transparent, and highly durable nitrile glove and a method for making the same, which can appropriately control the gloves according to the customer's requirements for the thickness, whiteness, transparency, and comfort of the gloves. The present invention optimizes the formula and preparation method of the nitrile gloves, and the prepared white, highly transparent, and highly durable nitrile gloves are more comfortable and durable to wear than ordinary nitrile gloves, and are more pleasant to use. The present invention proves through specific example data that compared to ordinary nitrile gloves that will be torn after 1-4 hours of wearing, the highly transparent and highly durable nitrile gloves will not be damaged after wearing for 12 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a process flow chart of a method for producing white, highly transparent and highly durable nitrile gloves proposed by the present invention;

[0039] Figure 2 This is a physical picture of a white, highly transparent, durable nitrile glove proposed by the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Embodiment 1:

[0042] The present invention provides a white, highly transparent and highly durable nitrile glove, the specific formula of which is as follows.

[0043] 1. Ingredients

[0044] 1.1. Formula of nitrile rubber latex

[0045] 1.1.1. Latex formula and proportion

[0046] raw material Ratio Dosage / Serving Nitrile rubber latex 100 20000 Stabilizer KOH 1.5 135 Vulcanizing agent ①S 1.0 90 Vulcanizing agent ②ZnO 1.5 135 Accelerator BZ 0.8 72 Antioxidant 0.5 45 Titanium dioxide 0.05 4.5 soft water Moderate 11048.5 Solid content% / 30

[0047] 1.1.2. Preparation of latex

[0048] Preparation operation points:

[0049] A1. Put the nitrile rubber latex into a mixing bucket, slowly add the diluted stabilizer KOH, then slowly add the vulcanizing agent (S, ZnO), accelerator BZ and antioxidant, then add appropriate amount of soft water and stir for 24 hours;

[0050] A2. After the stirring time reaches the standard, add the remaining soft water to the nitrile latex initially prepared in A1 and continue stirring. Filter it into another bucket with a 200-mesh sieve to remove the bubbles on the surface of the latex and stir for another 4 hours for standby use.

[0051] 1.2. Configuration of coagulant

[0052] 1.2.1. Formula and proportion of coagulant

[0053]

[0054]

[0055] 1.2.2 Key points for coagulant configuration

[0056] Put soft water into the mixing bucket used for preparing coagulant, add calcium nitrate while stirring, then add the isolation agent and wetting agent, stir for 24 hours to eliminate the bubbles, and set aside.

[0057] 1.3. Key points for glove preparation:

[0058] 1.3.1 Specific preparation process

[0059] A. Mold washing: prepare the hand mold, coagulant for dipping, nitrile rubber latex and clean water for leaching, electric constant temperature drying box for vulcanization and drying, etc. Wash the hand mold, and then put the hand mold into the electric constant temperature drying box for drying at a temperature of 80-90℃, until the water on the surface of the hand mold is completely dry and the surface temperature of the hand mold is 50-60℃;

[0060] B. Dip the heated hand model into the coagulant heated to 50°C until the hand model is slightly above the blue line of the hand model;

[0061] C. Coagulant drying: put the hand model soaked in coagulant into an electric constant temperature drying oven for drying at a temperature of 80-90°C for 5-10 minutes;

[0062] D. First dip: Stop stirring the first glue layer in the glue barrel, remove the stirring blade, remove the rubber or bubbles on the surface of the colloid, slowly dip the hand model that has reached the temperature standard and has been dipped in coagulant into the latex, dip it to the top blue line of the hand model and keep dipping for 5 seconds, slowly lift the hand model, turn the hand model over by hand to make the latex flow evenly, and place the hand model with the film on the table for a few minutes;

[0063] E. Second dip: After the first layer of latex on the hand model is completely solidified, check the latex of the second layer of glue, stop stirring and move the stirring blade to the side, remove the rubber and bubbles, and immerse the hand model covered with the first layer of glue film into the latex of the second layer of glue film for about 5 seconds, slowly lift the hand model out and rotate the hand model;

[0064] F. Shaping: Put the hand model processed in E into an electric constant temperature drying oven for 5 to 10 minutes, and control the temperature of the oven at 80 to 100°C;

[0065] G. Pre-leaching: Immerse the shaped hand mold in clean hot water (TDS≦1000) at 60-70℃ for 30s, lift the hand mold, drip off the water, and put it in a drying oven for vulcanization and drying;

[0066] H. Curling: Curl the hand model after leaching manually;

[0067] I. Drying and vulcanization: The temperature of drying and vulcanization is controlled at 80-90℃ in the early stage, and the time is about 20 minutes. Then the drying temperature is raised to 120-130℃ and the drying time is about 25 minutes.

[0068] J. Chlorine treatment: After the gloves have been cured and dried, cool them to room temperature and immerse them in chlorine water for 20 seconds, then take them out;

[0069] K. Neutralization: Immerse the chlorine-treated hand model in a baking soda solution for 20 seconds and take it out;

[0070] M. Post-leaching: Immerse the hand mold in hot water (TDS≦1000) at a temperature of 60-70°C for 60 seconds and take it out;

[0071] N. Post-drying: Dry the handle mold in an oven at 90-100℃ for 10 minutes;

[0072] O. Demoulding: Take out the dried hand mould and demould manually, and be careful not to tear or fold the gloves;

[0073] P. Inspection: Inspect the appearance of the gloves after removal, select those that do not meet the appearance requirements, and pack the qualified ones.

[0074] Embodiment 2:

[0075] The present invention provides a white, highly transparent and highly durable nitrile glove, the specific formula of which is as follows.

[0076] 1. Ingredients

[0077] 1.1. Formula of nitrile latex

[0078] 1.1.1. Glue formula and configuration ratio

[0079]

[0080]

[0081] 1.1.2. Preparation of latex

[0082] Preparation operation points:

[0083] A1. Put the nitrile rubber latex into a mixing bucket, slowly add the diluted stabilizer KOH, then slowly add the vulcanizing agent (S, ZnO), accelerator BZ and antioxidant, then add appropriate amount of soft water and stir for 24 hours;

[0084] A2. After the stirring time reaches the standard, add the remaining soft water to the nitrile latex initially prepared in A1 and continue stirring. Filter it into another bucket with a 200-mesh sieve to remove the bubbles on the surface of the latex and stir for another 4 hours for standby use.

[0085] 1.2. Preparation of coagulant

[0086] 1.2.1. Formula and proportion of coagulant

[0087] raw material Ratio Dosage / Serving Calcium Nitrate 17.5 3.5 Release agent 2.0 0.4 Wetting agent 0.1 0.02 soft water Moderate 16.08 total 100 20

[0088] 1.2.2. Key points for preparing coagulant

[0089] Put soft water into the mixing bucket used for preparing coagulant, add calcium nitrate while stirring, then add the isolation agent and wetting agent, stir for 24 hours to eliminate the bubbles, and set aside.

[0090] 1.3. Key points for glove preparation:

[0091] The specific preparation process is the same as that in Example 1.

[0092] The tensile properties of the nitrile gloves prepared in Example 1 above were tested, and the specific results are as follows:

[0093] before aging

[0094] serial number Breaking force / N Tensile strength / MPa Elongation at break / % 1 18.5 38.5 560 2 17.7 36.9 640 3 17.6 37.0 560 4 16.9 35.8 650 5 18.3 38.4 620 6 17.6 37.3 660 7 17.5 36.5 580 8 18.8 39.2 610 9 17.9 37.3 580 10 18.6 39.4 540 11 17.2 36.8 580 12 17.8 37.7 560 13 18.6 39.7 570

[0095] After aging

[0096]

[0097]

[0098] The above test results meet the tensile performance requirements of GB110213 "Disposable Medical Rubber Examination Gloves". Specific example data proves that compared with ordinary nitrile gloves that will be torn after 1-4 hours of wearing, this highly transparent and highly durable nitrile gloves will not be damaged after 12 hours of wearing.

[0099] The above description is only used to help understand the method of the present invention and its core essence, but the protection scope of the present invention is not limited thereto. For those skilled in the art in the art, equivalent replacement or change according to the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A white, highly transparent and highly durable nitrile glove, characterized in that: The raw materials for preparing the gloves include nitrile rubber latex and a coagulant; The nitrile rubber latex comprises the following raw material formula in parts by weight: 100 parts of nitrile rubber latex, 1.0-2.0 parts of stabilizer, 0.8-1.5 parts of vulcanizer, 1.0-2.5 parts of activator, 0.3-1.4 parts of accelerator, 0.0-2.0 parts of antioxidant, 0.0-3.0 parts of titanium dioxide and 45-55 parts of soft water; The coagulant comprises the following raw material formula in parts by weight: 10.0 to 25.0 parts of calcium nitrate, 1.0 to 2.5 parts of a separator, 0.1 parts of a wetting agent and 2.0 to 5.0 parts of soft water.

2. A white, highly transparent and highly durable nitrile glove according to claim 1, characterized in that: The preparation method of described nitrile rubber latex is as follows: A1. Put the nitrile rubber latex into a stirring barrel, start stirring, slowly add stabilizer, vulcanizer, activator, accelerator and soft water under stirring, and stir for 24 hours; A2. Continue stirring. Under stirring, further add diluted titanium dioxide and soft water to make the solid content of the mixed solution in the stirring barrel reach 20-35%. Use a 200-mesh screen to filter and transfer the mixed solution in the stirring barrel. After filtering, let it stand for 24-48 hours to defoam the prepared mixed nitrile rubber latex for standby use.

3. A white, highly transparent and highly durable nitrile glove according to claim 1, characterized in that: The preparation method of the coagulant is as follows: Place calcium nitrate in a mixing bucket filled with soft water and start stirring. After the calcium nitrate is fully dissolved, add a release agent and a wetting agent, stir and defoam for 24 to 48 hours, and set aside.

4. A method for making a white, highly transparent and highly durable nitrile glove as described in claims 1-3, characterized in that: The steps include: S1. Mold washing: clean the hand mold for glove preparation, and then put it into an electric constant temperature drying oven for drying until the moisture on the surface of the hand mold is completely dry; S2, dipping in coagulant: dipping the hand model processed in S1 into a coagulant preheated to 50-60 degrees Celsius until the coagulant liquid level slightly exceeds the preset mold line on the top of the hand model; S3, coagulant drying: putting the hand model treated in S2 into an electric constant temperature drying box for drying; S4, first dipping: put the prepared nitrile rubber latex into a stirring barrel for stirring, remove the stirring blade from the nitrile rubber latex after stirring, remove the rubber and bubbles on the surface of the latex, and then slowly put the hand model processed in S3 into the latex until the latex liquid surface is immersed in the preset mold line on the top of the hand model and keep it for 5 to 10 seconds, then lift the hand model, and keep turning the hand model to make the latex flow evenly, and then let the hand model with the film stand to dry; S5, second dipping: after the first layer of latex is completely solidified, the hand model covered with the first layer of latex is immersed in the mixing barrel again and kept for 5 to 10 seconds, then the hand model is lifted up, and the hand model is turned over continuously to make the latex flow evenly, and then left to dry; S6, shaping: putting the hand model processed in S5 into an electric constant temperature drying oven for drying, so that the latex on the surface of the hand model is completely shaped; S7, pre-leaching: immerse the shaped hand model in clean hot water at 60-70 degrees Celsius for 30-40 seconds, lift the hand model, and drain the water on the surface of the hand model; S8, curling: after the leaching is completed, the top of the latex on the surface of the hand mold is manually curled; S9, vulcanization and drying: putting the hand model treated in S8 into an electric constant temperature drying box for vulcanization and drying; S10, chlorine treatment: After the vulcanization and drying is completed, the hand mold is cooled to room temperature, then immersed in chlorine water for 20 to 25 seconds and taken out; S11, neutralization: immerse the hand model treated with chlorine for 20 to 25 seconds and take it out; S12, post-leaching: After the neutralization treatment is completed, the hand mold is immersed in hot water at a temperature of 60 to 70 degrees Celsius for 60 to 80 seconds and then taken out; S13, post-drying: putting the hand model processed in S12 into the electric constant temperature drying box again for drying; S14, demoulding: taking out the dried hand mold and manually demoulding the latex on the surface of the hand mold; S15. Inspection: Inspect the appearance of the gloves taken off, select those that do not meet the appearance requirements, and pack and store the qualified ones.

5. The method for making white, highly transparent and durable nitrile gloves according to claim 4, characterized in that: The drying temperature in S1 is 80-90 degrees Celsius, and the drying stops when the hand mold reaches 50-60 degrees Celsius; In S3, the drying temperature is 80 to 90 degrees Celsius and the drying time is 5 to 10 minutes; In S6, the drying temperature is 80 to 100 degrees Celsius and the drying time is 5 to 10 minutes; In S13, the drying temperature is 90 to 100 degrees Celsius, and the drying time is 10 to 15 minutes.

6. The method for making white, highly transparent and durable nitrile gloves according to claim 4, characterized in that: In the early stage of drying and vulcanization described in S9, the temperature is controlled at 80-90 degrees Celsius, and the drying time is 20-25 minutes; in the later stage of drying and vulcanization, the temperature is raised to 120-130 degrees Celsius, and the drying time is 25-30 minutes.

7. The method for making white, highly transparent and durable nitrile gloves according to claim 4, characterized in that: The TDS of the hot water used in the pre-leaching and post-leaching is ≤1000.

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