A coating composition and its use in the manufacture of coated gloves

Abstract

The present application relates to glove processing technical field, specifically to a kind of coating composition and its application in the preparation of coating gloves, the coating composition includes hyaluronic acid or its salt, glycerol and butanediol, the mass fraction of the hyaluronic acid or its salt is 0.06-0.29 parts, the mass fraction of the glycerol is 6-29 parts, the mass fraction of the butanediol is 1-5 parts.The coating gloves prepared by the coating composition provided by the present application can effectively improve the water content of the wearer's hand skin.In addition, the coating composition provided by the present application has simple preparation process, and the raw materials are easy to obtain, which is suitable for industrial production.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 202310942992.9, filed on July 28, 2023, with a priority date of June 30, 2023, entitled "A Glove with Coating". Technical Field

[0002] This invention relates to the field of glove processing technology, and more specifically to a coating composition and its application in the preparation of coated gloves. Background Technology

[0003] Disposable gloves are a common type of disposable protective gloves, currently widely used in medical examinations, healthcare, laboratories, electronics manufacturing, food processing, fast food services, and many other fields. With the continuous development of the global economy and changing consumer attitudes, people are placing greater demands on the functionality of gloves.

[0004] Wearing gloves (such as nitrile gloves) for extended periods can cause discomfort, especially leading to dry, rough skin on the hands, and in some cases, allergic reactions and redness. Chinese patent CN202504246U discloses a glove with an aloe vera coating, which has moisturizing effects on the skin. However, the preparation of the coated glove requires a sufficient volume of coating solution, and some waste occurs during use; furthermore, the use of aloe vera results in high costs. Chinese patent CN104621798A discloses a green aloe vera skin-care nitrile glove and its production method, which adds aloe vera powder during the preparation of nitrile latex to obtain skin-care nitrile gloves; however, this also suffers from high costs. Summary of the Invention

[0005] On one hand, the present invention provides a coating composition comprising hyaluronic acid or a salt thereof, glycerin and butylene glycol, wherein the hyaluronic acid or a salt thereof is present in parts by mass of 0.06-0.29, the glycerin in parts by mass of 6-29, and the butylene glycol in parts by mass of 1-5.

[0006] On the one hand, the present invention provides the use of the coating composition in the preparation of coated gloves.

[0007] On one hand, the present invention provides a coated glove having an inner surface for contact with the skin of a user's hand, the inner surface being provided with a coating comprising the coating composition.

[0008] In some embodiments, the coating on the inner surface of the coated glove increases the moisture content of the user's hand skin upon contact with the coating.

[0009] In one aspect, the present application provides a method for preparing the coated glove, comprising:

[0010] mixing the components of the coating composition by stirring to obtain a coating solution; immersing the glove in the coating solution, and after taking out, drying to obtain the coated glove.

[0011] In one aspect, the present application provides a method for preparing the coated glove, comprising the following steps:

[0012] (1) preparing a coating solution: mixing the components of the coating composition by stirring to obtain a coating solution;

[0013] (2) preparing a glove body: heating the glove model to 50-70℃, immersing in the coagulant solution for 1-5 seconds, and after taking out, drying; immersing the glove model in the nitrile latex auxiliary for 1-5 seconds, and after taking out, drying, vulcanization, chlorine washing and leaching to obtain the glove body;

[0014] (3) attaching the glove body to the hand mold, immersing in the coating solution, and after taking out, baking and demolding to obtain the coated glove.

[0015] In some embodiments, the glove model is a ceramic glove model.

[0016] In some embodiments, in step (2), the coagulant solution comprises a soluble salt, a release agent and water.

[0017] In some embodiments, the soluble salt is selected from one or more of calcium nitrate, calcium chloride, magnesium nitrate, magnesium chloride, zinc nitrate and zinc chloride.

[0018] In some embodiments, the release agent is selected from calcium stearate.

[0019] In some embodiments, the mass ratio of the soluble salt, the release agent and water is 6-12:0.5-1.5:70-90.

[0020] In some embodiments, in step (2), the nitrile latex auxiliary contains the following raw material components in mass fraction: zinc oxide powder 5-10 parts, sulfur powder 3-8 parts, accelerator BZ powder 0.5-3 parts, titanium white powder 1-5 parts, antioxidant powder 0.5-3 parts, dispersant powder 0.1-1.5 parts and water 130-150 parts.

[0021] In some embodiments, the nitrile latex auxiliary is prepared by the following method: adding the raw material components of the nitrile latex auxiliary into a dispersion stirring tank, adding water, and dispersing and stirring for 10-20 hours; the obtained dispersion liquid is circulated and ground in a sand mill for 4-8 hours until the particle size of the powder in the dispersion liquid is ≤5 μm to obtain the nitrile latex auxiliary.

[0022] In some embodiments, the solid content of the butyronitrile latex adjuvant is 45-55%.

[0023] In some embodiments, the dispersant is NNO.

[0024] In some embodiments, the anti-aging agent is KY-616, available from Jiangsu Feiya Chemical Industry Co., Ltd.

[0025] In some embodiments, the particle size of each raw material component of the butyronitrile latex is ≤5 μm.

[0026] In some embodiments, in step (2), the vulcanization temperature is 105-135°C, and the vulcanization time is 0.3-0.6 h.

[0027] In some embodiments, in step (3), the dipping is constant-temperature uniform-speed dipping, the dipping temperature is 50-70°C, and the dipping speed is 5 cm / s.

[0028] In some embodiments, the coating composition comprises hyaluronic acid or a salt thereof, glycerol, and butanediol, the mass fraction of the hyaluronic acid or the salt thereof is 0.06-0.29 parts, the mass fraction of the glycerol is 6-29 parts, and the mass fraction of the butanediol is 1-5 parts.

[0029] In some embodiments, the hyaluronic acid or the salt thereof is 0.1-0.2 parts, and the glycerol is 10-20 parts.

[0030] In some embodiments, the hyaluronic acid or the salt thereof is 0.11-0.18 parts, and the glycerol is 11-18 parts.

[0031] In some embodiments, the hyaluronic acid or the salt thereof is 0.12-0.17 parts, and the glycerol is 12-17 parts.

[0032] In some embodiments, the hyaluronic acid or the salt thereof is 0.13-0.17 parts, and the glycerol is 13-17 parts.

[0033] In some embodiments, the hyaluronic acid or the salt thereof is 0.14-0.17 parts, and the glycerol is 13-16 parts.

[0034] In some embodiments, the hyaluronic acid or the salt thereof is 0.14-0.16 parts, and the glycerol is 14-16 parts.

[0035] In some embodiments, the hyaluronic acid or the salt thereof is 0.15-0.16 parts, and the glycerol is 14-15 parts.

[0036] In some embodiments, the hyaluronic acid or the salt thereof is 0.16 parts, and the glycerol is 14 parts.

[0037] In some embodiments, the mass fraction of the butanediol is 3-4 parts.

[0038] In some embodiments, the mass fraction of the butanediol is 2 parts.

[0039] In some embodiments, the hyaluronic acid salt is sodium hyaluronate, potassium hyaluronate, or calcium hyaluronate.

[0040] In some embodiments, the hyaluronic acid salt is sodium hyaluronate.

[0041] In some embodiments, the coating composition further comprises water.

[0042] In some embodiments, the mass fraction of the water is 140-175 parts.

[0043] In some embodiments, the mass fraction of the water is 150-170 parts.

[0044] In some embodiments, the glove is a nitrile glove.

[0045] In some embodiments, the rubber-based glue used in the present application is nitrile rubber.

[0046] Terminology

[0047] Skin water content refers to the water content of the stratum corneum of the skin.

[0048] Skin water content change refers to the change in skin water content (%) of the subject before and after wearing the glove, and the calculation formula is = [(skin water content after wearing - skin water content before wearing) / skin water content before wearing] * 100%. DETAILED DESCRIPTION

[0049] The technical solutions of the present application are further illustrated by specific examples below, which do not represent a limitation on the scope of protection of the present application. Some non-essential modifications and adjustments made by others according to the concept of the present application still fall within the scope of protection of the present application.

[0050] Sodium hyaluronate was purchased from Dongying Fosite Biological Engineering Co., Ltd., with product number 1% sodium hyaluronate aqueous solution (mass fraction of sodium hyaluronate in the aqueous solution is 1%).

[0051] Glycerol was purchased from Wujiang Huitong Chemical Co., Ltd., with product number HT-045.

[0052] Allantoin was purchased from Qiansi Guangzhou Chemical Co., Ltd., with product number 126464163164.

[0053] Aloe extract was purchased from Xi'an Tiankang Biological Technology Co., Ltd., with product number TKLH20221017.

[0054] Butanediol was purchased from Jinan Xisuper Chemical Co., Ltd., item number 021.

[0055] Propylene glycol was purchased from Thailand Dow Chemical Co., Ltd., item number 0002.

[0056] Preparation of glove coating in Example 1

[0057] (1) Preparation of glove body:

[0058] S1, Preparation of butyronitrile latex auxiliary: zinc oxide powder 5 parts, sulfur powder 8 parts, accelerator BZ powder 3 parts, titanium white powder 5 parts, antioxidant powder 3 parts, dispersant powder 1.5 parts and water 200 parts were added to a dispersion stirring tank and dispersed and stirred for 10 hours to obtain a dispersion liquid. The dispersion liquid was circulated and ground in a sand mill for 4 hours until the particle size of the powder in the dispersion liquid was ≤5 μm to obtain the butyronitrile latex auxiliary. The solid content of the butyronitrile latex auxiliary was about 45%.

[0059] S2, after heating the glove model to 50-70℃, immerse in coagulant solution for 5 seconds, take out and dry, wherein the coagulant solution is calcium nitrate solution, the release agent is calcium stearate, and the mass ratio of the coagulant solution, release agent and water is 6:0.5:70.

[0060] S3, immerse the glove model obtained in step S2 in butyronitrile latex auxiliary for 5 seconds, take out and dry, vulcanize, chlorinate and leach to obtain butyronitrile gloves. The vulcanization temperature is 105℃ and the vulcanization time is 0.5h.

[0061] (2) Preparation of coating solution:

[0062] Mix the coating solution raw materials as shown in Table 1, and fully stir to disperse uniformly.

[0063] (3) Preparation of gloves containing coating:

[0064] Attach the butyronitrile gloves to the ceramic hand mold, immerse in the coating solution prepared in step (2) for 5 seconds, take out and perform oven baking and release processing to obtain the gloves. The immersion is constant temperature uniform immersion, the immersion temperature is 55℃, and the immersion speed is 5 cm / s.

[0065] Wearing experiment in Example 2

[0066] The coated gloves prepared in Example 1 were used for experiments, 10 people in each group. Before the test, the hands of the subjects were wiped with a paper towel to reduce the influence of sweat secretion. Then the skin moisture content of the back of the hand before wearing the gloves was tested using a skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series). After wearing the gloves for 40 min, they were taken off, and the skin surface of the hands was gently wiped with a paper towel to remove any sweat that may have appeared. Then the skin moisture content of the back of the hand after wearing the gloves was tested using a skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series). Finally, the change in skin moisture content before and after wearing the gloves was calculated (%). The test results are shown in Table 1. Change in skin moisture content before and after wearing gloves (%) = [(skin moisture content after wearing - skin moisture content before wearing) / skin moisture content before wearing] * 100%.

[0067] Table 1 Coating composition of different groups and wearing experiment results

[0068]

[0069]

[0070]

[0071] Note: The sodium hyaluronate solution described in Group A of Table 1 is a 1% sodium hyaluronate aqueous solution. The cost calculation is based on the current market reference price - the average price of a 1% sodium hyaluronate aqueous solution is 25-30 yuan / kg, the average price of a cosmetic-grade aloe extract is 35-50 yuan / kg, the average price of a cosmetic-grade allantoin is 40-50 yuan / kg, the average price of butanediol is about 10-20 yuan / kg, the average price of glycerol is about 10-20 yuan, and the average price of propylene glycol is about 10-20 yuan.

[0072] The change in moisture content of the back of the hand of the wearer after wearing the gloves prepared by coating was investigated. The results showed that the coated gloves of each group improved the skin moisture content of the wearer after taking off the gloves, and no redness was found in any of the test subjects. Compared with other groups, the subjects in Group A1 and Group A2 had a more refreshing and non-greasy feeling on their hands after taking off the gloves.

[0073] The experiment found that, as a glove coating formula, the sodium hyaluronate + glycerol (group A1, A2) complex group had the best effect, which was significantly better than the sodium hyaluronate + allantoin group (group A3) (P<0.05), the aloe + glycerol group (group A5) (P<0.05), or the allantoin + glycerol group (group A4) (P<0.05); it was slightly better than the sodium hyaluronate + aloe group (group A6, A7). Since the coating solution needs to be configured with sufficient volume for the preparation process of the glove, and there will be a certain waste of the coating solution, the cost is an important consideration factor. Glycerol, as a low-cost raw material, makes the sodium hyaluronate complex group of gloves skin care effect play well, not only can replace aloe coating to become a lower cost coating glove, and in effect, there is no more than. The skin care effect of the gloves of group A1 is the best, the skin care effect of the gloves of group A2 is better, and the cost of group A1 and group A2 is at the lowest level, which is an ideal glove coating group.

[0074] Example 3 glove coating preparation

[0075] (1) Preparation of glove body: the preparation method is the same as that of example 1.

[0076] (2) Preparation of coating solution: after mixing the coating solution raw materials shown in Table 2, fully stir to disperse uniformly.

[0077] (3) Preparation of gloves containing coating: attach the nitrile glove to the ceramic hand mold, immerse it in the coating solution prepared in step (2) for 5 seconds, take it out and perform the baking demolding process to obtain the gloves.

[0078] Example 4 wearing experiment

[0079] The coating gloves prepared in example 3 were used for the experiment, 10 people in each group, the test subjects used paper towels to wipe their hands before the test to reduce the influence of sweat secretion, then used a skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series) to test the moisture content of the back of the hand before wearing the gloves, then wore the gloves for 40 minutes and took them off, used a paper towel to gently wipe the sweat that may appear on the surface of the skin of the hand, then used a skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series) to test the moisture content of the back of the hand after wearing the gloves, finally calculated the change of skin moisture content (%) before and after wearing. The test results are shown in Table 2. The change of skin moisture content (%) before and after wearing = [(skin moisture content after wearing - skin moisture content before wearing) / skin moisture content before wearing] * 100%.

[0080] Table 2 different groups of coating components and wearing experiment results

[0081]

[0082]

[0083] Note: The hyaluronic acid sodium solution described in Table 2 Component A is a 1% hyaluronic acid sodium aqueous solution. The cost calculation is based on the current market reference price - the average price of 1% hyaluronic acid sodium aqueous solution is 25-30 yuan / kg, the average price of aloe extract is 35-50 yuan / kg, the average price of allantoin is 40-50 yuan / kg, the average price of butanediol is about 10-20 yuan / kg, the average price of glycerol is about 10-20 yuan, and the average price of propylene glycol is about 10-20 yuan.

[0084] The change of moisture of the back of the wearer's hand after wearing the gloves prepared by coating for a period of time was investigated. The results showed that the coating gloves of each group improved the skin moisture of the wearer after taking off the gloves, and no redness was found in any of the test subjects. Compared with other groups, the subjects of group B8, group B9, group C11, group C12, group D14, group D15, group E17, group E18, group F20 and group F21 had smoother and less greasy skin after taking off the gloves.

[0085] It was found that the combination of hyaluronic acid sodium + glycerol + butanediol (group B8, group C11, group D14, group E17, group F20) as the glove coating formula composition had better effect, which was specifically reflected in that group B8 was significantly better than the hyaluronic acid sodium + aloe + allantoin group (group B10) (P<0.05), group C11 was significantly better than the hyaluronic acid sodium + aloe + allantoin group (group C13) (P<0.05), group D14 was significantly better than the hyaluronic acid sodium + aloe + allantoin group (group D16) (P<0.05), group E17 was significantly better than the hyaluronic acid sodium + aloe + allantoin group (group E19) (P<0.05), and group F20 was significantly better than the hyaluronic acid sodium + aloe + allantoin group (group F22) (P<0.05).

[0086] Similarly, since the coating solution needs to be prepared in sufficient volume for the preparation of gloves, and there will be a certain waste of coating solution, cost is an important consideration factor. Glycerol, butanediol or propylene glycol as low-cost raw materials make the skin care effect of hyaluronic acid sodium combination group gloves well, and the cost is relatively low, which is an ideal glove coating formula.

[0087] In addition, as a glove coating formulation, the "sodium hyaluronate + glycerin + propylene glycol" group, although not as good as the "sodium hyaluronate + glycerin + butylene glycol" group, is still better than other groups. For example, group C12 is significantly better than the sodium hyaluronate + aloe + allantoin group (group C13) (P <0.05), group D15 is significantly better than the sodium hyaluronate + aloe + allantoin group (group D16) (P <0.05), group E18 is significantly better than the sodium hyaluronate + aloe + allantoin group (group E19) (P <0.05), group F21 is significantly better than the sodium hyaluronate + aloe + allantoin group (group F22) (P <0.05), and group B9 is not significantly better than the sodium hyaluronate + aloe + allantoin group (group B10) (P >0.05), but group B9 is slightly better than group B10 in terms of cost, which is much lower than group B10. Therefore, glycerin and propylene glycol, as low-cost raw materials, make the sodium hyaluronate complex group's glove skin care effect better, and the cost is relatively low. It is also an ideal glove coating group.

[0088] Compared with the "sodium hyaluronate + glycerin + propylene glycol" group, the "sodium hyaluronate + glycerin + butylene glycol" group has more outstanding advantages overall, and can obtain significantly better moisturizing effect in a larger "sodium hyaluronate: glycerin" ratio range. The "sodium hyaluronate + glycerin + propylene glycol" group needs to be more strictly compounded "sodium hyaluronate: glycerin" ratio to further improve the moisturizing effect. But in terms of moisturizing / cost indicators, both groups are significantly better than other groups.

[0089] Example 5 glove coating preparation

[0090] (1) Preparation of glove body: the preparation method is the same as that of Example 1.

[0091] (2) Preparation of coating solution: mix the coating solution raw materials as shown in Table 3, and fully stir to disperse uniformly.

[0092] (3) Preparation of gloves containing coating: attach the butyronitrile gloves to the ceramic hand mold, immerse in the coating solution prepared in step (2) for 5 seconds, and then take out and perform baking and demolding treatment to obtain the gloves.

[0093] Example 6 wearing experiment

[0094] The gloves coated with the coating prepared in Example 5 were used for the experiment, 10 persons in each group. Before the test, the hands of the subjects were wiped with a paper towel to reduce the influence of sweat secretion. Then, the water content of the back of the hand was tested before wearing the gloves using a skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series). After wearing the gloves for 40 min, the gloves were taken off, and the skin surface of the hands was gently wiped with a paper towel to remove the sweat. Then, the water content of the back of the hand after wearing the gloves was tested using a skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series). Finally, the change in the water content of the skin before and after wearing the gloves was calculated (%). The test results are shown in Table 3. Change in water content of the skin before and after wearing the gloves (%) = [(water content of the skin after wearing the gloves - water content of the skin before wearing the gloves) / water content of the skin before wearing the gloves] * 100%.

[0095] Table 3 Coating components of different groups and wearing experiment results

[0096]

[0097]

[0098]

[0099] Note: The sodium hyaluronate solution described in Group A of Table 3 is a 1% sodium hyaluronate aqueous solution.

[0100] The change in the water content of the back of the hand of the wearer after wearing the gloves prepared by coating was investigated. The results showed that the coating gloves of each group improved the water content of the skin of the wearer after taking off the gloves, and no redness was found in any of the test subjects.

[0101] It was found that, as the amount of the glove coating formula, the combination of Group G1 was the best in Groups G1-G5, which was significantly better than Group G2 (P < 0.05), Group G3 (P < 0.05), Group G4 (P < 0.05), or Group G5 (P < 0.05). Therefore, by adjusting the suitable ratio of sodium hyaluronate and glycerol, the water content of the skin of the wearer can be better improved within a certain amount range.

[0102] In addition, as the amount of the glove coating formula, the combinations of Groups H1-H18 were better. Therefore, by adjusting the suitable ratio of sodium hyaluronate + glycerol, and butylene glycol or allantoin or propylene glycol, the water content of the skin of the wearer can be better improved within a certain amount range.

[0103] Example 7 Mechanical property test of gloves

[0104] The coated gloves prepared from Group B8, Group C10, Group D13, Group E16 and Group F19 of Example 4 were tested for glove performance according to American Standard ASTM D6319, and the results are shown in Table 4.

[0105] Table 4 Test results of glove mechanical properties

[0106] Group Maximum force / N Tensile strength / Mpa Elongation at break / % B8 11.040 28.643 597.006 C10 10.279 26.919 541.604 D13 9.922 24.915 515.469 E16 10.985 29.951 520.088 F19 11.040 28.643 597.006

[0107] The results show that the coated gloves prepared from Group B8, Group C10, Group D13, Group E16 and Group F19 have a tensile strength ≥ 25 MPa and an elongation at break ≥ 500%, and have better tensile strength and elongation at break compared with ordinary pure butyronitrile gloves.

[0108] The above examples are only used to illustrate the technical solutions of the present application but not to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. The application of a coating composition in the preparation of coated gloves, characterized in that, The coating composition comprises hyaluronic acid or its salt, glycerin and butylene glycol, wherein the hyaluronic acid or its salt is present in parts by mass of 0.06-0.29, the glycerin in parts by mass of 6-29, and the butylene glycol in parts by mass of 1-5.

2. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt comprises 0.1-0.2 parts, and glycerol comprises 10-20 parts.

3. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt comprises 0.11-0.18 parts, and glycerol comprises 11-18 parts.

4. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt comprises 0.12-0.17 parts, and glycerol comprises 12-17 parts.

5. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt comprises 0.13-0.17 parts, and glycerol comprises 13-17 parts.

6. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt comprises 0.14-0.17 parts, and glycerol comprises 13-16 parts.

7. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt comprises 0.14-0.16 parts, and glycerol comprises 14-16 parts.

8. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt comprises 0.15-0.16 parts, and glycerol comprises 14-15 parts.

9. The application as described in claim 1, characterized in that, The hyaluronic acid or its salt is 0.16 parts, and the glycerin is 14 parts.

10. The application as described in claim 1, characterized in that, The butanediol is present in 3-4 parts by mass.

11. The application as described in claim 1, characterized in that, The butanediol is present in 2 parts by mass.

12. The application as described in claim 1, characterized in that, The hyaluronic acid salt is sodium hyaluronate, potassium hyaluronate, or calcium hyaluronate.

13. The application as described in claim 1, characterized in that, The hyaluronic acid salt is sodium hyaluronate.

14. The application as described in claim 1, characterized in that, The coating composition also includes water.

15. The application as described in claim 14, characterized in that, The water has a mass fraction of 140-175 parts.

16. The application as described in claim 14, characterized in that, The water has a mass fraction of 150-170 parts.

17. A coated glove, characterized in that, The coated glove has an inner surface for contact with the user's skin, the inner surface being provided with a coating, the coating being prepared from a coating composition comprising hyaluronic acid or a salt thereof, glycerin and butylene glycol, wherein the hyaluronic acid or a salt thereof is present in parts by mass of 0.06-0.29, the glycerin in parts by mass of 6-29, and the butylene glycol in parts by mass of 1-5.

18. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt comprises 0.1-0.2 parts, and glycerol comprises 10-20 parts.

19. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt comprises 0.11-0.18 parts, and glycerol comprises 11-18 parts.

20. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt comprises 0.12-0.17 parts, and glycerol comprises 12-17 parts.

21. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt comprises 0.13-0.17 parts, and glycerol comprises 13-17 parts.

22. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt comprises 0.14-0.17 parts, and glycerol comprises 13-16 parts.

23. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt comprises 0.14-0.16 parts, and glycerol comprises 14-16 parts.

24. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt comprises 0.15-0.16 parts, and glycerol comprises 14-15 parts.

25. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid or its salt is 0.16 parts, and the glycerin is 14 parts.

26. The coated glove as claimed in claim 17, characterized in that, The butanediol is present in 3-4 parts by mass.

27. The coated glove as claimed in claim 17, characterized in that, The butanediol is present in 2 parts by mass.

28. The coated gloves as claimed in claim 17, characterized in that, The hyaluronic acid salt is sodium hyaluronate, potassium hyaluronate, or calcium hyaluronate.

29. The coated glove as claimed in claim 17, characterized in that, The hyaluronic acid salt is sodium hyaluronate.

30. The coated glove as claimed in claim 17, characterized in that, The coating composition also includes water.

31. The coated glove as claimed in claim 30, characterized in that, The water has a mass fraction of 140-175 parts.

32. The coated glove as claimed in claim 30, characterized in that, The water has a mass fraction of 150-170 parts.

33. The coated gloves as claimed in claim 17, characterized in that, The coating on the inner surface of the coated gloves increases the moisture content of the user's hands after it comes into contact with the user's skin.

34. A method for preparing coated gloves as described in any one of claims 17-33, characterized in that, include: The components of the coating composition are stirred and mixed to obtain a coating solution; The gloves are immersed in a coating solution, removed, and then dried to obtain the coated gloves.

35. The method as described in claim 34, characterized in that, The gloves are nitrile gloves.

Images