A disposable degradable environmentally friendly nitrile latex glove and its processing technology

Abstract

This application relates to the technical field of nitrile latex gloves, and specifically discloses a disposable degradable and environmentally friendly nitrile latex glove and its processing technology. A disposable degradable and environmentally friendly nitrile latex glove, which comprises the following raw materials in parts by weight: 80-100 parts of carboxylated nitrile latex, 10-30 parts of modified starch, 0.1-0.3 part of antioxidant 616, 1-3 parts of phosphite, 3-5 parts of vulcanizing agent, 1-3 parts of zinc oxide, 1-3 parts of sodium dodecylbenzenesulfonate, and 0.5-1 part of sodium methylenebis(naphthalenesulfonate); the modified starch is obtained by coating and modifying with epoxidized soybean oil. The degradation rates of the nitrile latex gloves obtained in this application when buried in the soil for 1 month, 2 months, and 3 months are at most 53%, 74%, and 95% respectively, and complete degradation occurs in 4 months, improving the degradability of the nitrile latex gloves.

Description

Technical Field

[0001] This application relates to the technical field of nitrile latex gloves. More specifically, it relates to a disposable degradable environmentally friendly nitrile latex glove and its processing technology. Background Art

[0002] Nitrile latex gloves are essential protective supplies for hand protection and preventing cross-infection. They are non-toxic and harmless, have high stretchability, puncture resistance, tensile strength, and abrasion resistance, cause minimal harm to human skin, and have high adhesion. They can be widely used in factories such as electronics, chemical industry, and food, as well as in hospitals and scientific research.

[0003] Currently, the global market demand for nitrile latex gloves is still increasing year by year, and the consumption is also gradually increasing, resulting in more and more discarded nitrile latex gloves. When disposing of discarded nitrile latex gloves, people generally use landfilling methods. However, the landfilled nitrile latex gloves are not easily degradable, which increases the environmental burden. Summary of the Invention

[0004] In order to improve the degradability of nitrile latex gloves, this application provides a disposable degradable environmentally friendly nitrile latex glove and its processing technology.

[0005] In the first aspect, this application provides a disposable degradable environmentally friendly nitrile latex glove, which adopts the following technical solution:

[0006] The disposable degradable environmentally friendly nitrile latex glove includes the following raw materials in parts by weight: 80-100 parts of carboxylated nitrile latex, 10-30 parts of modified starch, 0.15-0.25 parts of antioxidant 616, 1.5-2.5 parts of phosphite, 3-5 parts of vulcanizing agent, 1-3 parts of zinc oxide, 1-3 parts of sodium dodecylbenzenesulfonate, and 0.5-1 part of sodium methylenebis(naphthalenesulfonate); the modified starch is obtained by coating and modifying with epoxidized soybean oil.

[0007] This application's nitrile latex gloves can select 80-100 parts of carboxylated nitrile latex, 10-30 parts of modified starch, 0.15-0.25 parts of antioxidant 616, 1.5-2.5 parts of phosphite, 3-5 parts of vulcanizing agent, 1-3 parts of zinc oxide, 1-3 parts of sodium dodecylbenzenesulfonate, and 0.5-1 part of sodium methylenebis(naphthalenesulfonate). Any value within their respective ranges can be selected, and it can improve the degradability of nitrile latex gloves. Moreover, 90 parts of carboxylated nitrile latex, 20 parts of modified starch, 0.2 part of antioxidant 616, 2 parts of phosphite, 4 parts of vulcanizing agent, 2 parts of zinc oxide, 2 parts of sodium dodecylbenzenesulfonate, and 0.8 part of sodium methylenebis(naphthalenesulfonate) have the best effect.

[0008] By adopting the above technical solution, the modified starch is obtained by coating and modification with epoxy soybean oil, forming a flexible protective shell on the surface of the starch. On the one hand, it improves the water resistance of the starch and the mechanical properties of the nitrile latex gloves. On the other hand, it improves the interfacial compatibility between the starch and the nitrile latex, thereby enhancing the degradation effect of the starch in the nitrile latex gloves.

[0009] Carboxylated nitrile latex is an anionic polymer emulsion. The molecular weight and particle size distribution of this latex are relatively uniform. It is resistant to oil, solvents, acids, and alkalis. Moreover, the latex particles and the vulcanizing agent particles collide with each other. During the process where the vulcanizing agent particles enter the rubber phase and crosslink with the latex particles, chemical crosslinking occurs, making the properties of the nitrile latex more stable. Zinc oxide is added as a vulcanization activator, which can improve the activity of aziridine and the vulcanizing agent, thereby accelerating the vulcanization of the latex and playing a role in strengthening and anti-aging. Sodium dodecylbenzenesulfonate is added as a stabilizer. It is easily soluble in water and chemically stable to alkalis, dilute acids, and hard water, which can improve the stability of the nitrile latex. Sodium methylene bisnaphthalenesulfonate is added as a dispersant to improve the dispersibility of each raw material of the gloves.

[0010] Preferably: A disposable degradable and environmentally friendly nitrile latex glove comprises the following raw materials in parts by weight: 85 - 95 parts of carboxylated nitrile latex, 15 - 25 parts of modified starch, 0.15 - 0.25 part of antioxidant 616, 1.5 - 2.5 parts of phosphite, 3.5 - 4.5 parts of vulcanizing agent, 1.5 - 2.5 parts of zinc oxide, 1.5 - 2.5 parts of sodium dodecylbenzenesulfonate, and 0.7 - 0.9 part of sodium methylene bisnaphthalenesulfonate.

[0011] In this application, the nitrile latex glove can select 85 - 95 parts of carboxylated nitrile latex, 15 - 25 parts of modified starch, 0.15 - 0.25 part of antioxidant 616, 1.5 - 2.5 parts of phosphite, 3.5 - 4.5 parts of vulcanizing agent, 1.5 - 2.5 parts of zinc oxide, 1.5 - 2.5 parts of sodium dodecylbenzenesulfonate, and 0.7 - 0.9 part of sodium methylene bisnaphthalenesulfonate. Any value within their respective ranges can be selected, and it can improve the degradability of the nitrile latex glove.

[0012] Preferably: The modified starch is prepared through the following operation steps: Mix 10 - 20 kg of starch with 0.2 - 0.4 kg of bis(3-triethoxysilylpropyl)tetrasulfide for reaction, and then add it to 1 - 3 L of epoxy soybean oil for mixing and stirring reaction to obtain the modified starch.

[0013] By adopting the above technical solution, the starch is mixed with bis(3-triethoxysilylpropyl)tetrasulfide to form a gas film coating on the surface of the starch, improving the affinity between the starch and the epoxy soybean oil. On the other hand, it can improve the tensile strength and tear strength of the starch. Then it is mixed with epoxy soybean oil to improve the interfacial compatibility between the starch and the nitrile latex, thereby enhancing the degradability of the nitrile latex glove.

[0014] Preferably, the starch is at least one of corn starch, tapioca starch, potato starch or rice starch.

[0015] Preferably, the disposable degradable environmentally friendly nitrile latex glove further comprises the following raw materials in parts by weight: 5-10 parts of hydroxypropyl methylcellulose ether.

[0016] By adopting the above technical solution, hydroxypropyl methylcellulose ether has good viscosity stability. As a thickening film-forming agent added, it has high compatibility with each raw material. Adding hydroxypropyl methylcellulose ether can improve the film-forming strength of starch, thereby improving the mechanical properties of nitrile latex gloves.

[0017] Preferably, the weight ratio of the hydroxypropyl methylcellulose ether to the modified starch is 1:(2-5).

[0018] By adopting the above technical solution, adjusting the weight ratio of the hydroxypropyl methylcellulose ether to the modified starch can further improve the film-forming strength of starch.

[0019] Preferably, the disposable degradable environmentally friendly nitrile latex glove further comprises the following raw materials in parts by weight: 0.5-0.1 part of 4-octylphenol ethoxylate and 1-2 parts of isosorbide diacetate.

[0020] By adopting the above technical solution, 4-octylphenol ethoxylate and isosorbide diacetate are added as plasticizers. Both of them are degradable. On the one hand, they play a plasticizing role, and on the other hand, they improve the degradability of nitrile latex gloves.

[0021] Preferably, the disposable degradable environmentally friendly nitrile latex glove further comprises the following raw materials in parts by weight: 5-10 parts of polyvinyl alcohol.

[0022] By adopting the above technical solution, polyvinyl alcohol is added as a biodegradant. On the one hand, it improves the degradability of nitrile latex gloves, and on the other hand, it can also improve the mechanical properties of starch, thereby improving the strength of nitrile latex gloves.

[0023] In the second aspect, the present application provides a preparation method of any one of the above-mentioned disposable degradable environmentally friendly nitrile latex gloves.

[0024] A preparation method of a disposable degradable environmentally friendly nitrile latex glove, which comprises the following operating steps:

[0025] Mix the raw materials of the nitrile latex glove, stir evenly to obtain a nitrile latex mixture;

[0026] Preheat the hand mold, immerse it in the nitrile latex mixture, heat and vulcanize, curl the edge, cool and demold to obtain a nitrile latex glove.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] (1) By adjusting the types and dosages of the raw materials of the nitrile latex gloves, the present application enables the tensile strength, elongation at break, anti-aging grade, and abrasion resistance grade of the nitrile latex gloves to be up to 30 MPa, 544%, grade 2, and grade 4 respectively, showing relatively high mechanical properties.

[0029] (2) By adjusting the types and dosages of the raw materials of the nitrile latex gloves and the dosage of the modified starch, the degradation rates of the nitrile latex gloves buried in the soil for 1 month, 2 months, 3 months, and 4 months are 40%, 63%, 86%, and 92% respectively, improving the degradability of the nitrile latex gloves.

[0030] (3) By adding propyl methyl cellulose ether to the raw materials of the nitrile latex gloves and adjusting the weight ratio of propyl methyl cellulose ether to the modified starch, the degradation rates of the nitrile latex gloves buried in the soil for 1 month, 2 months, 3 months, and 4 months are 42 - 44%, 65 - 67%, 88 - 89%, and 93 - 94% respectively, further improving the degradability of the nitrile latex gloves.

[0031] (4) By adding octylphenol ethoxylate and isosorbide 2 - acetate on the basis of adding propyl methyl cellulose ether to the raw materials of the nitrile latex gloves, the degradation rates of the nitrile latex gloves buried in the soil for 1 month, 2 months, 3 months, and 4 months are 47%, 70%, 93%, and 98% respectively, improving the degradability of the nitrile latex gloves.

[0032] (5) By adding polyvinyl alcohol on the basis of adding propyl methyl cellulose ether, octylphenol ethoxylate, and isosorbide 2 - acetate to the raw materials of the nitrile latex gloves, the degradation rates of the nitrile latex gloves buried in the soil for 1 month, 2 months, 3 months, and 4 months are 53%, 74%, 95%, and complete degradation respectively, further improving the degradability of the nitrile latex gloves. Detailed Embodiments

[0033] The following further elaborates on the present application in conjunction with specific embodiments.

[0034] The following raw materials in this application are all commercially available products. To fully disclose the raw materials of this application, it should not be construed as restricting the source of the raw materials. Specifically: carboxylated nitrile latex, with an active substance content of 99%; vulcanizing agent, sulfur is selected; zinc oxide, with a particle size of 30 nm; sodium dodecylbenzenesulfonate, with an active substance content of 99%; sodium methylenebis(naphthalenesulfonate), with a diffusion rate of 95%; starch, tapioca starch is selected; bis(3-triethoxysilylpropyl)tetrasulfide, with an active substance content of 99%; epoxidized soybean oil, with an active substance content of 99%; hydroxypropyl methylcellulose ether, with an active substance content of 99%; octylphenol ethoxide, with a particle size of 80 mesh; isosorbide diacetate, with an active substance content of 99.9%; polyvinyl alcohol, with an active substance content of 99.9%.

[0035] The following are preparation examples of modified starch

[0036] Preparation Example 1

[0037] The modified starch of Preparation Example 1 was prepared through the following operating steps:

[0038] 10 kg of starch was mixed and reacted with 0.1 kg of bis(3-triethoxysilylpropyl)tetrasulfide, and then added to 2 L of epoxidized soybean oil and mixed, followed by stirring and reacting to obtain the modified starch.

[0039] Preparation Examples 2 - 5

[0040] The preparation method of Emulsifier A in Preparation Examples 2 - 5 was the same as that of Preparation Example 1, except that the dosages of bis(3-triethoxysilylpropyl)tetrasulfide were 2 kg, 3 kg, 4 kg, and 5 kg respectively, and the remaining operations were the same as those in Preparation Example 1.

[0041] Example 1

[0042] The disposable degradable environmentally friendly nitrile latex gloves of Example 1 were prepared through the following preparation method:

[0043] According to the dosages in Table 1, carboxylated nitrile latex, modified starch, antioxidant 616, phosphite, vulcanizing agent, zinc oxide, sodium dodecylbenzenesulfonate, and sodium methylenebis(naphthalenesulfonate) were mixed and stirred evenly to obtain a nitrile latex mixture;

[0044] The hand mold was preheated to 62 °C, immersed in the nitrile latex mixture, heated and vulcanized, crimped, and cooled and demolded to obtain nitrile latex gloves.

[0045] Among them, the modified starch selected was the modified starch prepared in Preparation Example 1.

[0046] Examples 2 - 3

[0047] The preparation method of the disposable degradable environmentally friendly nitrile latex gloves in Example 2-3 is the same as that in Example 1, except that the dosages of each raw material are different. For details, see Table 2 below.

[0048] Table 1 Dosages of each raw material of the disposable degradable environmentally friendly nitrile latex gloves in Examples 1-3 (kg)

[0049]

[0050]

[0051] Examples 4-8

[0052] The preparation method of the disposable degradable environmentally friendly nitrile latex gloves in Examples 4-8 is the same as that in Example 2, except that the raw materials also include hydroxypropyl methylcellulose ether. For details, see Table 2 below.

[0053] Table 2 Dosages of each raw material of the disposable degradable environmentally friendly nitrile latex gloves in Examples 4-8 (kg)

[0054]

[0055] Examples 9-13

[0056] The preparation method of the disposable degradable environmentally friendly nitrile latex gloves in Examples 9-13 is the same as that in Example 6, except that the raw materials also include octylphenol ethoxide and isosorbide 2-acetate. For details, see Table 3 below.

[0057] Table 3 Dosages of each raw material of the disposable degradable environmentally friendly nitrile latex gloves in Examples 9-13 (kg)

[0058]

[0059]

[0060] Examples 14-16

[0061] The preparation method of the disposable degradable environmentally friendly nitrile latex gloves in Examples 14-16 is the same as that in Example 12, except that the raw materials also include polyvinyl alcohol. For details, see Table 4 below.

[0062] Table 4 Dosages of each raw material of the disposable degradable environmentally friendly nitrile latex gloves in Examples 14-16 (kg)

[0063]

[0064] Examples 17-20

[0065] The preparation method of the disposable degradable environmentally friendly nitrile latex gloves of Examples 17 - 20 is the same as that of Example 15, except that the modified starch is the modified starch prepared in Preparation Examples 2 - 5, and the types and dosages of the remaining raw materials are the same as those in Example 15.

[0066] Comparative Example 1

[0067] The preparation method of the disposable degradable environmentally friendly nitrile latex gloves of Comparative Example 1 is the same as that of Example 1, except that the starch is not modified, and the types and dosages of the remaining raw materials are the same as those in Example 1.

[0068] Performance Testing

[0069] The performance of the disposable degradable environmentally friendly nitrile latex gloves obtained in different Examples 1 - 20 and Comparative Example 1 was tested respectively using the following testing standards or methods. The test results are shown in Table 5.

[0070] Tensile Strength: The tensile strength of the nitrile latex gloves was tested in accordance with ASTM D412 - 16 standard.

[0071] Elongation at Break: The elongation at break of the nitrile latex gloves was tested in accordance with ASTM D412 - 16 standard.

[0072] Anti - aging Grade: The anti - aging grade of the nitrile latex gloves was tested in accordance with GB 10006 - 1988 "Test Method for Coefficient of Friction of Plastic Films and Sheets".

[0073] Wear Resistance: The wear resistance of the nitrile latex gloves was tested in accordance with EN388.

[0074] Table 5 Performance Test Results of Different Nitrile Latex Gloves

[0075]

[0076]

[0077] The test results in Table 5 show that the highest tensile strength, elongation at break, anti - aging grade and wear resistance grade of the nitrile latex gloves obtained in this application are 30 MPa, 544%, Grade 2 and Grade 4 respectively, having relatively high mechanical properties.

[0078] Combined with the performance test data of the nitrile latex gloves in Examples 1 - 3, it can be seen that the highest tensile strength, elongation at break, anti - aging grade and wear resistance grade of the nitrile latex gloves in Example 2 are 23 MPa, 524%, Grade 2 and Grade 4 respectively, all higher than the mechanical properties of the nitrile latex gloves in Example 1 and Example 3, indicating that the dosage of the modified starch in the raw materials of the nitrile latex gloves in Example 2 is more appropriate, improving the mechanical properties of the nitrile latex gloves.

[0079] Combined with the performance test data of the nitrile latex gloves in Examples 4-8, it can be seen that the highest tensile strength, elongation at break, anti-aging grade, and wear resistance grade of the nitrile latex gloves in Examples 5-7 are 25-26 MPa, 530-532%, Grade 2, and Grade 4 respectively, all of which are higher than the mechanical properties of the nitrile latex gloves in Examples 1 and 2. This indicates that the weight ratio of hydroxypropyl methylcellulose ether to modified starch being 1:(2-5) is more appropriate, improving the mechanical properties of the nitrile latex gloves. It may be related to adjusting the weight ratio of hydroxypropyl methylcellulose ether to modified starch, which can further improve the film-forming strength of the starch.

[0080] Combined with the performance test data of the nitrile latex gloves in Examples 9-13, it can be seen that the highest tensile strength, elongation at break, anti-aging grade, and wear resistance grade of the nitrile latex gloves in Example 12 are 28 MPa, 536%, Grade 2, and Grade 4 respectively, all of which are higher than the mechanical properties of the nitrile latex gloves in Examples 9-11 and 13. This indicates that the dosages of octylphenol ethoxylate and isosorbide 2-acetate in the raw materials of the nitrile latex gloves in Example 12 are more appropriate, improving the mechanical properties of the nitrile latex gloves.

[0081] Combined with the performance test data of the nitrile latex gloves in Examples 14-16, it can be seen that the highest tensile strength, elongation at break, anti-aging grade, and wear resistance grade of the nitrile latex gloves in Example 15 are 30 MPa, 544%, Grade 2, and Grade 4 respectively, higher than the mechanical properties of the nitrile latex gloves in Examples 14 and 16. This indicates that the dosage of polyvinyl alcohol in the raw materials of the nitrile latex gloves in Example 15 is more appropriate, improving the mechanical properties of the nitrile latex gloves.

[0082] Combined with the performance test data of the nitrile latex gloves in Example 15 and Examples 17-20, it can be seen that the highest tensile strength, elongation at break, anti-aging grade, and wear resistance grade of the nitrile latex gloves in Examples 17-19 are 31-32 MPa, 554-547%, Grade 2, and Grade 4 respectively, higher than the mechanical properties of the nitrile latex gloves in Examples 15 and 20. This indicates that the dosages of bis(3-triethoxysilylpropyl)tetrasulfide in the modified starch of Examples 17-20 are more appropriate, improving the mechanical properties of the nitrile latex gloves.

[0083] In addition, by combining the various index data of the nitrile latex gloves in Comparative Example 1 and Example 1, it is found that adding modified starch to the raw materials of the nitrile latex gloves in this application improves the mechanical properties of the nitrile latex gloves.

[0084] Performance Test (II)

[0085] Degradation rate: The disposable degradable environmentally friendly nitrile latex gloves obtained in Examples 1-20 and Comparative Example 1 were buried in the soil, and the degradation of the nitrile latex gloves was regularly checked at 1 month, 2 months, 4 months, and 6 months. The test results are shown in Table 6.

[0086] Table 6 Performance test results of different nitrile latex gloves

[0087]

[0088]

[0089] The test results in Table 6 show that the highest degradation rates of the nitrile latex gloves obtained in this application when buried in the soil for 1 month, 2 months, and 3 months are 53%, 74%, and 95% respectively, and complete degradation occurs at 4 months, improving the degradability of the nitrile latex gloves.

[0090] Combined with the performance test data of the nitrile latex gloves in Examples 1-3, it can be seen that the degradation rates of the nitrile latex gloves in Example 2 when buried in the soil for 1 month, 2 months, 3 months, and 4 months are 40%, 63%, 86%, and 92% respectively, which are higher than those of the nitrile latex gloves in Example 1 and Example 2, indicating that the dosage of the modified starch in the raw materials of the nitrile latex gloves in Example 2 is more appropriate, improving the degradability of the nitrile latex gloves. This may be related to the fact that the modified starch is obtained by coating and modifying with epoxy soybean oil, forming a flexible protective shell on the surface of the starch, improving the water resistance of the starch on the one hand and the interfacial compatibility between the starch and the nitrile latex on the other hand, thus enhancing the degradation effect of the starch in the nitrile latex gloves.

[0091] Combined with the performance test data of the nitrile latex gloves in Examples 4-8, it can be seen that the degradation rates of the nitrile latex gloves in Examples 4-8 when buried in the soil for 1 month, 2 months, 3 months, and 4 months are 40-41%, 63-64%, 86-87%, and 92-93% respectively, indicating that adjusting the weight ratio of hydroxypropyl methyl cellulose ether to modified starch has no obvious effect on improving the degradability of the nitrile latex gloves.

[0092] Combined with the performance test data of the nitrile latex gloves in Examples 9-13, it can be seen that the degradation rates of the nitrile latex gloves in Example 12 when buried in the soil for 1 month, 2 months, 3 months, and 4 months are 47%, 70%, 93%, and 98% respectively, which are higher than those of the nitrile latex gloves in Examples 9-11 and Example 13, indicating that the dosages of octylphenol ethoxide and isosorbide 2-acetate in the raw materials of the nitrile latex gloves in Example 12 are more appropriate, improving the degradability of the nitrile latex gloves. This may be related to the addition of octylphenol ethoxide and isosorbide 2-acetate as photo-degradants, promoting the degradation of the nitrile latex gloves under sunlight irradiation, thus improving the degradability of the nitrile latex gloves.

[0093] Combined with the performance test data of the nitrile latex gloves in Examples 14 - 16, it can be seen that the degradation rates of the nitrile latex gloves in Example 15 buried in the soil for 1 month, 2 months, 3 months, and 4 months are 53%, 74%, 95%, and complete degradation respectively, which are higher than the degradation rates of the nitrile latex gloves in Example 14 and Example 16, indicating that the dosage of polyvinyl alcohol in the raw materials of the nitrile latex gloves in Example 15 is more appropriate, improving the degradability of the nitrile latex gloves. This may be related to the addition of polyvinyl alcohol as a biodegradant, which can further improve the degradability of the nitrile latex gloves.

[0094] Combined with the performance test data of the nitrile latex gloves in Example 15 and Examples 17 - 20, it can be seen that the degradation rates of the nitrile latex gloves in Examples 17 - 19 buried in the soil for 1 month, 2 months, 3 months, and 4 months are 54 - 56%, 75 - 78%, 96 - 98%, and complete degradation respectively, which are higher than the degradation rates of the nitrile latex gloves in Example 15 and Example 20, indicating that the dosage of bis(3 - triethoxysilylpropyl)tetrasulfide in the modified starch in Examples 17 - 19 is more appropriate, improving the degradability of the nitrile latex gloves.

[0095] In addition, by combining the various index data of the nitrile latex gloves in Comparative Example 1 and Example 1, it is found that adding modified starch to the raw materials of the nitrile latex gloves in this application improves the degradability of the nitrile latex gloves.

[0096] This specific embodiment is only an interpretation of this application and is not a limitation to this application. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A disposable degradable environmentally friendly nitrile latex glove, characterized in that, It comprises the following raw materials in parts by weight: 80-100 parts of carboxylated nitrile latex, 10-30 parts of modified starch, 0.1-0.3 part of antioxidant 616, 1-3 parts of phosphite, 3-5 parts of vulcanizing agent, 1-3 parts of zinc oxide, 1-3 parts of sodium dodecylbenzenesulfonate, and 0.5-1 part of sodium methylenebis(naphthalenesulfonate); the modified starch is obtained by coating and modification with epoxidized soybean oil. The modified starch is prepared through the following operating steps: mixing and reacting 10-20 kg of starch with 0.2-0.4 kg of bis(3-triethoxysilylpropyl)tetrasulfide, adding the mixture to 1-3 L of epoxidized soybean oil for mixing, and stirring and reacting to obtain the modified starch; the disposable degradable environmentally friendly nitrile latex glove further comprises the following raw materials in parts by weight: 5-10 parts of hydroxypropyl methylcellulose ether; the weight ratio of the hydroxypropyl methylcellulose ether to the modified starch is 1:(2-5).

2. The disposable degradable environmentally friendly nitrile latex gloves according to claim 1, characterized in that, It comprises the following raw materials in parts by weight: 85-95 parts of carboxylated nitrile latex, 15-25 parts of modified starch, 0.15-0.25 part of antioxidant 616, 1.5-2.5 parts of phosphite, 3.5-4.5 parts of vulcanizing agent, 1.5-2.5 parts of zinc oxide, 1.5-2.5 parts of sodium dodecylbenzenesulfonate, and 0.7-0.9 part of sodium methylenebis(naphthalenesulfonate).

3. The disposable degradable environmentally friendly nitrile latex gloves according to claim 1, characterized in that, The starch is at least one of corn starch, cassava starch, potato starch, or rice starch.

4. The disposable degradable environmentally friendly nitrile latex gloves according to claim 1, wherein: The disposable degradable environmentally friendly nitrile latex glove further comprises the following raw materials in parts by weight: 0.5-1 part of octylphenol ethoxylate, 1-2 parts of isosorbide diacetate.

5. The disposable degradable environmentally friendly nitrile latex gloves according to claim 1, characterized in that: The disposable degradable environmentally friendly nitrile latex glove further comprises the following raw materials in parts by weight: 5-10 parts of polyvinyl alcohol.

6. A preparation method of the disposable degradable environmentally friendly nitrile latex glove according to any one of claims 1-5, characterized in that, It comprises the following operating steps: Mixing the raw materials of the nitrile latex glove and stirring evenly to obtain a nitrile latex mixture; Preheating the hand mold, dipping it into the nitrile latex mixture, heating and vulcanizing, curling the edge, cooling and demolding to obtain a nitrile latex glove.

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