Glove with coating

Abstract

The invention relates to the technical field of glove processing, in particular to a glove containing a coating and a preparation method thereof.The glove is provided with an inner surface used for making contact with the hand skin of a user, the inner surface is provided with the coating, and the coating comprises hyaluronic acid or salt thereof and glycerin. According to the glove containing the coating, the water content of the hand skin of a wearer can be effectively increased, meanwhile, the preparation process of the coating is simple, raw materials are easy to obtain, and the glove is suitable for industrial production.

Description

Technical Field

[0001] The present invention relates to the technical field of glove processing, and in particular to a glove containing a coating and a preparation method thereof. Background Art

[0002] Disposable gloves are a common type of disposable isolation protective gloves, which are currently widely used in many fields such as medical examination, medical care, laboratories, electronic product processing, food processing, fast food services, etc. With the continuous development of the world economy and the continuous changes in people's consumption concepts, people have put forward more requirements on the functions of gloves.

[0003] Wearing gloves (such as nitrile gloves) for a long time may cause discomfort to the wearer, especially when the wearer wears the gloves for a long time, the skin of the hands is prone to dryness and astringency, and some individuals also experience allergic redness and other phenomena. Chinese patent CN202504246U discloses a pair of gloves with aloe vera coating, which has a moisturizing effect on the skin, but because in the preparation process of the coated gloves, a sufficient volume of coating solution needs to be configured, and the coating solution will be wasted during use, the cost of using aloe vera is relatively high. Chinese patent CN104621798A discloses a green aloe vera skin-care nitrile glove and a production method thereof, which prepares nitrile gloves with skin-care properties by adding aloe vera powder in the process of preparing nitrile latex, but there is also a problem of high cost. Summary of the invention

[0004] In one aspect, the present invention provides a glove comprising a coating, wherein the glove has an inner surface for contacting with the skin of a user's hand, wherein the inner surface is provided with a coating, wherein the coating comprises hyaluronic acid or a salt thereof, and glycerol.

[0005] In some embodiments, the coating on the inner surface of the glove increases the moisture content of the user's hand skin after contact with the user's skin.

[0006] In some embodiments, the coating comprises, by weight, 0.06-0.29 parts of hyaluronic acid or a salt thereof and 6-29 parts of glycerol.

[0007] In some embodiments, hyaluronic acid or its salt is 0.1-0.2 parts, and glycerol is 10-20 parts.

[0008] In some embodiments, hyaluronic acid or its salt is 0.11-0.18 parts, and glycerol is 11-18 parts.

[0009] In some embodiments, hyaluronic acid or its salt is 0.12-0.17 parts, and glycerol is 12-17 parts.

[0010] In some embodiments, hyaluronic acid or its salt is 0.13-0.17 parts, and glycerol is 13-17 parts.

[0011] In some embodiments, the hyaluronic acid or its salt is 0.14-0.17 parts and the glycerol is 13-16 parts.

[0012] In some embodiments, hyaluronic acid or its salt is 0.14-0.16 parts, and glycerol is 14-16 parts.

[0013] In some embodiments, hyaluronic acid or its salt is 0.15-0.16 parts, and glycerol is 14-15 parts.

[0014] In some embodiments, hyaluronic acid or its salt is 0.16 parts and glycerol is 14 parts.

[0015] In some embodiments, the coating further comprises one of butylene glycol, allantoin, or propylene glycol.

[0016] In some embodiments, the mass fraction of the butylene glycol, or allantoin, or propylene glycol is 1-5 parts.

[0017] In some embodiments, the mass fraction of the butylene glycol, allantoin or propylene glycol is 3-4 parts.

[0018] In some embodiments, the mass fraction of the butylene glycol, allantoin or propylene glycol is 2 parts.

[0019] In some embodiments, the hyaluronate salt is sodium hyaluronate, potassium hyaluronate, or calcium hyaluronate.

[0020] In some embodiments, the hyaluronate is sodium hyaluronate.

[0021] In another aspect, the present invention further provides a coating solution, comprising hyaluronic acid or a salt thereof, and glycerol.

[0022] In some embodiments, the mass fraction of the hyaluronic acid or its salt is 0.06-0.29 parts, and the mass fraction of the glycerol is 6-29 parts.

[0023] In some embodiments, hyaluronic acid or its salt is 0.1-0.2 parts, and glycerol is 10-20 parts.

[0024] In some embodiments, hyaluronic acid or its salt is 0.11-0.18 parts, and glycerol is 11-18 parts.

[0025] In some embodiments, hyaluronic acid or its salt is 0.12-0.17 parts, and glycerol is 12-17 parts.

[0026] In some embodiments, hyaluronic acid or its salt is 0.13-0.17 parts, and glycerol is 13-17 parts.

[0027] In some embodiments, the hyaluronic acid or its salt is 0.14-0.17 parts and the glycerol is 13-16 parts.

[0028] In some embodiments, hyaluronic acid or its salt is 0.14-0.16 parts, and glycerol is 14-16 parts.

[0029] In some embodiments, hyaluronic acid or its salt is 0.15-0.16 parts, and glycerol is 14-15 parts.

[0030] In some embodiments, hyaluronic acid or its salt is 0.16 parts and glycerol is 14 parts.

[0031] In some embodiments, the coating solution further includes one of butylene glycol, allantoin, or propylene glycol.

[0032] In some embodiments, the mass fraction of the butylene glycol, allantoin or propylene glycol is 1-5 parts.

[0033] In some embodiments, the mass fraction of the butylene glycol, allantoin or propylene glycol is 3-4 parts.

[0034] In some embodiments, the mass fraction of the butylene glycol, allantoin or propylene glycol is 2 parts.

[0035] In some embodiments, preferably, the coating solution further comprises water.

[0036] In some embodiments, the mass fraction of water is 140-175 parts.

[0037] In some embodiments, the mass fraction of water is 150-170 parts.

[0038] In some embodiments, the hyaluronate salt is sodium hyaluronate, potassium hyaluronate, or calcium hyaluronate.

[0039] In some embodiments, the hyaluronate is sodium hyaluronate.

[0040] On the other hand, the present invention also provides a method for preparing gloves, comprising the following steps:

[0041] S1: preparing the coating solution: stirring and mixing the components to obtain the coating solution;

[0042] S2: Immerse the gloves in the coating solution prepared in step S1, take them out and dry them to obtain the gloves.

[0043] On the other hand, the present invention also provides a glove having an inner surface for contacting with the skin of a user's hand, wherein the glove is obtained by immersing the inner surface in the above-mentioned coating solution and then taking it out and drying it.

[0044] In some embodiments, the gloves are nitrile gloves.

[0045] In some embodiments, the gloves can also be prepared by the following steps:

[0046] (1) preparing the above-mentioned coating solution, stirring and mixing the components to obtain the coating solution;

[0047] (2) After heating the glove former to 50-70° C., immerse it in the coagulant solution for 1-5 seconds, and then take it out and dry it;

[0048] (3) dipping the glove model obtained in step (2) into the nitrile latex auxiliary material for 1-5 seconds, taking it out, drying, vulcanizing, chlorine washing and leaching to obtain a nitrile glove, and attaching the nitrile glove to the ceramic hand model;

[0049] (4) The glove attached to the ceramic hand mold obtained in step (3) is immersed in the coating solution prepared in step (1), taken out and subjected to baking and demolding treatment to obtain the glove.

[0050] In some embodiments, in step (2), the coagulant solution comprises a soluble salt, a release agent and water.

[0051] 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.

[0052] In some embodiments, the release agent is selected from calcium stearate.

[0053] In some embodiments, the mass ratio of the soluble salt, the release agent and water is 6-12:0.5-1.5:70-90.

[0054] In some embodiments, in step (3), the nitrile latex auxiliary material comprises the following raw material components in parts by weight: 5-10 parts of zinc oxide powder, 3-8 parts of sulfur powder, 0.5-3 parts of accelerator BZ powder, 1-5 parts of titanium dioxide, 0.5-3 parts of antioxidant powder, 0.1-1.5 parts of dispersant powder and 130-150 parts of water.

[0055] In some embodiments, the nitrile latex auxiliary material is prepared by the following method:

[0056] The raw material components of the nitrile latex auxiliary material are added into a dispersion stirring tank, water is added, and the dispersion is stirred for 10-20 hours. The obtained dispersion is cyclically ground in a sand mill for 4-8 hours until the powder particle size in the dispersion is ≤5 μm, thereby obtaining the nitrile latex auxiliary material.

[0057] In some embodiments, the solid content of the nitrile latex auxiliary material is 45-55%.

[0058] In some embodiments, the dispersant is NNO.

[0059] In some embodiments, the antioxidant is KY-616.

[0060] In some embodiments, the particle size of each raw material component of the nitrile latex is ≤5 μm.

[0061] In some embodiments, the rubber base selected in the present invention is nitrile rubber.

[0062] In some embodiments, in step (3), the vulcanization temperature is 105-135° C., and the vulcanization time is 0.3-0.6 h.

[0063] In some embodiments, in step (4), the impregnation is a constant temperature and uniform speed impregnation, the impregnation temperature is 50-70° C., and the impregnation speed is 5 cm / s.

[0064] Explanation of terms

[0065] Skin moisture content refers to the water content of the skin's stratum corneum.

[0066] Skin moisture content change refers to the change in skin moisture content (%) before and after the subject wears the gloves, and its calculation formula = [(skin moisture content after wearing - skin moisture content before wearing) / skin moisture content before wearing] * 100%. DETAILED DESCRIPTION

[0067] The technical solution of the present invention is further described below by specific embodiments, which do not limit the protection scope of the present invention. Some non-essential modifications and adjustments made by others based on the concept of the present invention still fall within the protection scope of the present invention.

[0068] Sodium hyaluronate was purchased from Dongying First Bioengineering Co., Ltd., Cat. No. 1% sodium hyaluronate aqueous solution (the mass fraction of sodium hyaluronate in the aqueous solution is 1%).

[0069] Glycerol was purchased from Wujiang Huitong Chemical Co., Ltd., product number HT-045.

[0070] Allantoin was purchased from Qiansiguang (Guangzhou) Chemical Co., Ltd., product number 126464163164.

[0071] Aloe vera extract was purchased from Xi’an Tiankang Biotechnology Co., Ltd., product number TKLH20221017.

[0072] Butanediol was purchased from Jinan Xinchaorui Chemical Co., Ltd., product number 021.

[0073] Propylene glycol was purchased from The Dow Chemical Company, Thailand, product number 0002.

[0074] Example 1 Glove coating preparation

[0075] (1) Preparation of the glove body:

[0076] S1, preparation of nitrile latex auxiliary material: add 5 parts of zinc oxide powder, 8 parts of sulfur powder, 3 parts of accelerator BZ powder, 5 parts of titanium dioxide, 3 parts of antioxidant powder, 1.5 parts of dispersant powder and 200 parts of water into a dispersing and stirring tank, disperse and stir for 10 hours to obtain a dispersion. The dispersion is circulated and ground in a sand mill for 4 hours until the powder particle size in the dispersion is ≤5μm to obtain the nitrile latex auxiliary material. The solid content of the nitrile latex auxiliary material is about 45%.

[0077] S2. After heating the glove former to 50-70° C., immerse it in a coagulant solution for 5 seconds, take it out and dry it, wherein the coagulant solution is a calcium nitrate solution, the release agent is calcium stearate, and the mass ratio of the coagulant solution, the release agent and water is 6:0.5:70.

[0078] S3. The glove former obtained in step S2 is immersed in the nitrile latex auxiliary material for 5 seconds, taken out, dried, vulcanized, chlorine washed and leached to obtain the nitrile gloves.

[0079] (2) Preparation of coating solution:

[0080] After mixing the coating solution raw materials shown in Table 1, stir them thoroughly to make them dispersed evenly.

[0081] (3) Preparation of coated gloves:

[0082] The nitrile gloves are attached to the ceramic hand mold, immersed in the coating solution prepared in step (2) for 5 seconds, taken out and baked for demoulding treatment to obtain the gloves.

[0083] Example 2 Wearing experiment

[0084] The coated gloves prepared in Example 1 were used for the experiment, with 10 subjects in each group. Before the test, the subjects wiped their hands with a paper towel to reduce the influence of sweat secretion, and 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 skin before wearing the gloves. Then, the gloves were taken off after wearing for 40 minutes, and the sweat that may appear on the surface of the hand skin was gently wiped with a paper towel. Then, the skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series) was used to test the moisture content of the back of the hand skin after wearing the gloves, and finally the change in skin moisture before and after wearing (%) was calculated. The test results are shown in Table 1. Change in skin moisture before and after wearing % = [(skin moisture after wearing-skin moisture before wearing) / skin moisture before wearing]*100%.

[0085] Table 1 Coating composition and wearing test results of different groups

[0086]

[0087]

[0088] Note: The sodium hyaluronate solution described in component A of Table 1 is an aqueous solution with a mass fraction of sodium hyaluronate of 1%. The cost calculation is based on the current market reference price: the average price of a 1% aqueous solution of sodium hyaluronate is 25-30 yuan / kg, the average price of cosmetic-grade raw material aloe extract is 35-50 yuan / kg, the average price of cosmetic-grade allantoin is 40-50 yuan / kg, the average price of butylene glycol is about 10-20 yuan / kg, the average price of glycerin is about 10-20 yuan, and the average price of propylene glycol is about 10-20 yuan.

[0089] The changes in moisture of the wearer's back skin after wearing the gloves prepared by coating for a period of time were investigated. The results showed that the coated gloves in each group increased the moisture of the wearer's skin after taking off the gloves, and no redness was found in any of the test subjects. Compared with the other groups, the hands of the subjects in groups A1 and A2 were more refreshed and did not feel greasy after taking off the gloves.

[0090] The experiment found that as a glove coating formula, the compound group of sodium hyaluronate + glycerol (group A1, A2) had the best effect, which was significantly better than the sodium hyaluronate + allantoin group (group A3) (P<0.05), aloe + glycerol group (group A5) (P<0.05), or allantoin + glycerol group (group A4) (P<0.05); slightly better than the sodium hyaluronate + aloe group (group A6, A7). Since it is used as a coating solution in the preparation process of gloves, it is necessary to configure a sufficient volume of coating solution, and there will be a certain amount of waste in the coating solution, so cost is an important consideration. Glycerol, as a low-cost raw material, makes the glove skin care effect of the sodium hyaluronate compound group play a good role, which can not only replace the aloe coating to become a coated glove with a lower production cost, but also has better effect. The gloves of group A1 have the best skin care effect, and the gloves of group A2 have better skin care effect. The costs of groups A1 and A2 are at the lowest level, which is an ideal glove coating formula.

[0091] Example 3 Glove coating preparation

[0092] (1) Preparation of glove body: The preparation method is the same as that in Example 1.

[0093] (2) Preparation of coating solution: Mix the coating solution raw materials shown in Table 2 and stir them thoroughly to make them evenly dispersed.

[0094] (3) Preparation of coated gloves: attaching a nitrile glove to a ceramic hand mold, dipping the glove in the coating solution prepared in step (2) for 5 seconds, taking the glove out and performing a baking and demoulding treatment to obtain the glove.

[0095] Example 4 Wearing experiment

[0096] The coated gloves prepared in Example 3 were used for the experiment, with 10 subjects in each group. Before the test, the subjects wiped their hands with a paper towel to reduce the influence of sweat secretion, and 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 skin before wearing the gloves. Then, the gloves were taken off after wearing for 40 minutes, and the sweat that may appear on the surface of the hand skin was gently wiped with a paper towel. Then, the skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series) was used to test the moisture content of the back of the hand skin after wearing the gloves, and finally the change in skin moisture before and after wearing (%) was calculated. The test results are shown in Table 2 below. Change in skin moisture before and after wearing % = [(skin moisture after wearing - skin moisture before wearing) / skin moisture before wearing] * 100%.

[0097] Table 2 Composition of coating components in different groups and wearing test results

[0098]

[0099]

[0100]

[0101] Note: The sodium hyaluronate solution described in component A of Table 2 is an aqueous solution with a mass fraction of sodium hyaluronate of 1%. The cost calculation is based on the current market reference price: the average price of a 1% aqueous solution of sodium hyaluronate is 25-30 yuan / kg, the average price of cosmetic-grade raw material aloe extract is 35-50 yuan / kg, the average price of cosmetic-grade allantoin is 40-50 yuan / kg, the average price of butylene glycol is about 10-20 yuan / kg, the average price of glycerin is about 10-20 yuan, and the average price of propylene glycol is about 10-20 yuan.

[0102] The moisture changes of the wearer's back skin after wearing the gloves prepared by coating for a period of time were investigated. The results showed that the coated gloves in each group increased the moisture of the wearer's skin after taking off the gloves, and no redness was found in the test subjects. Compared with other groups, the hands of the subjects in groups B8, B9, C11, C12, D14, D15, E17, E18, F20 and F21 were more refreshing and did not feel greasy after taking off the gloves.

[0103] The experiment found that as the composition of the glove coating formula, the compound group of sodium hyaluronate + glycerol + butylene glycol (group B8, group C11, group D14, group E17, group F20) had better effect, specifically: group B8 was significantly better than the sodium hyaluronate + aloe + allantoin group (group B10) (P<0.05), group C11 was significantly better than the sodium hyaluronate + aloe + allantoin group (group C13) (P<0.05), group D14 was significantly better than the sodium hyaluronate + aloe + allantoin group (group D16) (P<0.05), group E17 was significantly better than the sodium hyaluronate + aloe + allantoin group (group E19) (P<0.05), and group F20 was significantly better than the sodium hyaluronate + aloe + allantoin group (group F22) (P<0.05).

[0104] Similarly, since the coating solution used in the preparation process of gloves requires a sufficient volume of coating solution and there will be a certain amount of waste in the coating solution, cost is an important consideration. Glycerin, butylene glycol or propylene glycol are low-cost raw materials, which enable the sodium hyaluronate compound group to achieve a good skin care effect on gloves, while the cost is relatively low, making it an ideal glove coating formula.

[0105] In addition, as a glove coating formula, although the "sodium hyaluronate + glycerol + propylene glycol" group was not as effective as the "sodium hyaluronate + glycerol + butylene glycol" group, it also had obvious advantages over other groups. For example, group C12 was significantly better than the sodium hyaluronate + aloe + allantoin group (group C13) (P<0.05), group D15 was significantly better than the sodium hyaluronate + aloe + allantoin group (group D16) (P<0.05), group E18 was significantly better than the sodium hyaluronate + aloe + allantoin group (group E19) (P<0.05), group F21 was significantly better than the sodium hyaluronate + aloe + allantoin group (group F22) (P<0.05), and although group B9 was not significantly better than the sodium hyaluronate + aloe + allantoin group (group B10) (P>0.05), group B9 had a slightly better effect than group B10, and its preparation cost was much lower than that of group B10. Therefore, glycerin and propylene glycol, as low-cost raw materials, enable the sodium hyaluronate compound group to achieve good skin care effects on gloves, while the cost is relatively low, and it is also an ideal glove coating formula.

[0106] Compared with the "sodium hyaluronate + glycerin + propylene glycol" group, the "sodium hyaluronate + glycerin + butylene glycol" group has more prominent advantages overall. It can achieve significantly better moisturizing effects within a larger "sodium hyaluronate: glycerin" ratio range; while the "sodium hyaluronate + glycerin + propylene glycol" group requires a more stringent "sodium hyaluronate: glycerin" ratio to further enhance the moisturizing effect. However, in terms of comprehensive moisturizing / cost indicators, these two groups have significantly better effects than other groups.

[0107] Example 5 Glove Coating Preparation

[0108] (1) Preparation of glove body: The preparation method is the same as that in Example 1.

[0109] (2) Preparation of coating solution: Mix the coating solution raw materials shown in Table 3 and stir them thoroughly to make them evenly dispersed.

[0110] (3) Preparation of coated gloves: attaching a nitrile glove to a ceramic hand mold, dipping the glove in the coating solution prepared in step (2) for 5 seconds, taking the glove out and performing a baking and demoulding treatment to obtain the glove.

[0111] Example 6 Wearing experiment

[0112] The coated gloves prepared in Example 5 were used for the experiment, with 10 subjects in each group. Before the test, the subjects wiped their hands with a paper towel to reduce the influence of sweat secretion, and 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 skin before wearing the gloves. Then, the gloves were taken off after wearing for 40 minutes, and the sweat that may appear on the surface of the hand skin was gently wiped with a paper towel. Then, the skin tester (purchased from Shenzhen Fuhengtong Technology Co., Ltd., IMATE series) was used to test the moisture content of the back of the hand skin after wearing the gloves, and finally the change in skin moisture before and after wearing (%) was calculated. The test results are shown in Table 3 below. Change in skin moisture before and after wearing % = [(skin moisture after wearing - skin moisture before wearing) / skin moisture before wearing] * 100%.

[0113] Table 3 Composition of coating components in different groups and wearing test results

[0114]

[0115]

[0116]

[0117]

[0118] Note: The sodium hyaluronate solution described in component A of Table 3 is an aqueous solution with a mass fraction of sodium hyaluronate of 1%.

[0119] The changes in moisture content of the wearer's back skin after wearing the gloves prepared by coating for a period of time were investigated. The results showed that the coated gloves in each group increased the moisture content of the wearer's skin after taking off the gloves, and no redness was found in any of the test subjects.

[0120] The experiment found that as the dosage of glove coating formula, among the G1-G5 groups, the compound group of group G1 had the best effect, 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). It can be seen that regulating the appropriate ratio of sodium hyaluronate and glycerol can better improve the moisture content of the wearer's skin within a certain dosage range.

[0121] Also, as the dosage of glove coating formula, the compound groups of group H1-group H18 have better effects. It can be seen that regulating the appropriate ratio of sodium hyaluronate + glycerol and butylene glycol or allantoin or propylene glycol can better improve the moisture content of the wearer's skin within a certain dosage range.

[0122] Example 7 Glove Mechanical Properties Test

[0123] The coated gloves made from group B8, group C10, group D13, group E16 and group F19 of Example 4 were tested for glove properties according to the U.S. standard ASTM D6319. The results are shown in Table 4.

[0124] Table 4 Glove mechanical properties test results

[0125]

[0126]

[0127] The results showed that the coated gloves made from group B8, group C10, group D13, group E16 and group F19 had a tensile strength ≥ 25 MPa and an elongation at break ≥ 500%, which had better tensile strength and elongation at break than ordinary pure nitrile gloves.

[0128] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention 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 invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A glove, characterized in that: The glove has an inner surface for contacting with the skin of a user's hand, and the inner surface is provided with a coating, which contains hyaluronic acid or a salt thereof, and glycerin.

2. The glove according to claim 1, characterized in that After the coating on the inner surface of the glove contacts the user's skin, the moisture content of the user's hand skin increases.

3. The glove according to claim 1, characterized in that The coating comprises, by weight, 0.06-0.29 parts of hyaluronic acid or its salt and 6-29 parts of glycerol; Preferably, 0.1-0.2 parts of hyaluronic acid or its salt, 10-20 parts of glycerol; More preferably, 0.11-0.18 parts of hyaluronic acid or its salt, 11-18 parts of glycerol; More preferably, 0.12-0.17 parts of hyaluronic acid or its salt, 12-17 parts of glycerol; More preferably, 0.13-0.17 parts of hyaluronic acid or its salt, 13-17 parts of glycerol; More preferably, 0.14-0.17 parts of hyaluronic acid or its salt, 13-16 parts of glycerol; More preferably, 0.14-0.16 parts of hyaluronic acid or its salt, 14-16 parts of glycerol; More preferably, 0.15-0.16 parts of hyaluronic acid or its salt, 14-15 parts of glycerol; More preferably, 0.16 parts of hyaluronic acid or its salt and 14 parts of glycerol.

4. The glove according to claim 1, characterized in that The coating further comprises one of butylene glycol, allantoin or propylene glycol; Preferably, the mass fraction of the butylene glycol, allantoin or propylene glycol is 1-5 parts; More preferably, the mass fraction of the butylene glycol, allantoin or propylene glycol is 3-4 parts; Or more preferably, the mass fraction of the butylene glycol, allantoin or propylene glycol is 2 parts; Preferably, the hyaluronate is sodium hyaluronate, potassium hyaluronate or calcium hyaluronate; Preferably, the hyaluronate is sodium hyaluronate.

5. A coating solution, characterized in that: The coating solution includes hyaluronic acid or a salt thereof, and glycerol.

6. The coating solution according to claim 5, characterized in that The mass fraction of the hyaluronic acid or its salt is 0.06-0.29 parts, and the mass fraction of the glycerol is 6-29 parts; Preferably, 0.1-0.2 parts of hyaluronic acid or its salt, 10-20 parts of glycerol; More preferably, 0.11-0.18 parts of hyaluronic acid or its salt, 11-18 parts of glycerol; More preferably, 0.12-0.17 parts of hyaluronic acid or its salt, 12-17 parts of glycerol; More preferably, 0.13-0.17 parts of hyaluronic acid or its salt, 13-17 parts of glycerol; More preferably, 0.14-0.17 parts of hyaluronic acid or its salt, 13-16 parts of glycerol; More preferably, 0.14-0.16 parts of hyaluronic acid or its salt, 14-16 parts of glycerol; More preferably, 0.15-0.16 parts of hyaluronic acid or its salt, 14-15 parts of glycerol; More preferably, 0.16 parts of hyaluronic acid or its salt and 14 parts of glycerol.

7. The coating solution according to claim 5, characterized in that The coating solution further includes one of butylene glycol, allantoin or propylene glycol; Preferably, the mass fraction of the butylene glycol, allantoin or propylene glycol is 1-5 parts; More preferably, the mass fraction of the butylene glycol, allantoin or propylene glycol is 3-4 parts; Or more preferably, the mass fraction of the butylene glycol, allantoin or propylene glycol is 2 parts; Preferably, the coating solution further comprises water; Preferably, the mass fraction of the water is 140-175 parts; Preferably, the mass fraction of the water is 150-170 parts; Preferably, the hyaluronate is sodium hyaluronate, potassium hyaluronate, or calcium hyaluronate; Preferably, the hyaluronate is sodium hyaluronate.

8. A method for preparing gloves, characterized in that: The following steps are involved: S1: preparing the coating solution as claimed in claim 5: stirring and mixing the components to obtain the coating solution; S2: Immerse the gloves in the coating solution prepared in step S1, take them out and dry them to obtain the gloves.

9. A glove, characterized in that: The glove has an inner surface for contacting with the skin of a user's hand, and the glove is made by dipping the inner surface into the coating solution as claimed in claim 5 and then taking it out for drying.

10. The glove according to claims 1-4, or the coating solution according to claims 5-7, or the method according to claim 8, or the glove according to claim 9, characterized in that: The gloves are nitrile gloves.

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