Moisturizing skin care coating, method for preparing the same, and disposable moisturizing elastic glove

Abstract

To provide one kind of moisturizing skin care coating, a method for preparing the coating, and a disposable moisturizing elastic glove.SOLUTION: Provided are moisturizing skin care coating, a method for producing the coating, and a disposable moisturizing elastic glove. The moisturizing skin care coating is calculated by the a total weight of a coating, and contains 2.65 wt% to 3.50 wt% of chitosan solution, 85.40 wt% to 86.20 wt% of moisturizing liquid, and 11.10 wt% to 11.25 wt% of additive agent. The chitosan solution is formed by decomposing chitosan having the density of N-ethyl removal rate of 55% or more and 0.3 g / ml or more in acidic aqueous solution. The acidic aqueous solution is solution having pH value of less than 6.5 which is formed by organic acid dissolved into deionized water. The moisturizing liquid contains carrier solution and at least one kind of moisturizing agent, and additive contains cellulose. The moisturizing skin care coating of the present invention is uniformly dispersed into the glove through solution formed of chitosan and organic acid to provide a disposable wearing experience, and a moisturizing skin care effect is achieved.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to the technical field of disposable elastic gloves, in particular to a moisturizing skin care coating and a method for preparing the same, and to a disposable moisturizing elastic glove. [Background technology]

[0002] Disposable elastic gloves, including medical gloves, are widely used as a form of workplace protection by isolating the hands from the objects being handled. To facilitate easier handling of objects, disposable elastic gloves are typically made of thin, stretchy materials that provide "comfort and excellent fit" to the wearer's hands, allowing the wearer to wear them for extended periods of time. However, due to the lack of breathability of glove materials, sweating is a common problem for wearers. Furthermore, glove materials tend to adhere to the skin of the hands over long periods of wear, leading to moisture loss and undermining the protection provided by the stratum corneum. Sweating and moisture on the hands not only leads to extreme dryness and sensitivity, but can also lead to infections and, in severe cases, ultimately to more serious skin diseases.

[0003] To solve the above problems, U.S. Patent No. 5,614,202 discloses moisturizing gloves with an intermediate layer containing lotion or cream, which allows the lotion to pass through the intermediate layer via a porous inner layer design and come into contact with the skin of the user's hand. U.S. Patent No. 5,869,072 also discloses moisturizing gloves for medical treatment, in which a mixture (containing a mixture of a certain amount of polyvinyl alcohol, water, moisturizing cream, and vitamins) is applied to the porous inner layer and pores in the glove body that form the porous inner layer, and then cured.

[0004] The aforementioned US patent is based on incorporating skin care ingredients into the inner layer of gloves to provide skin care and moisturizing effects to the skin of the hands. However, the use of oil-based emollients in lotions and creams can cause an unpleasant greasiness on the skin and can lead to "uncomfortable wear" due to the "wet phase" of the gloves and potential stickiness of the "glove donning surface" (i.e., the inner surface that comes into contact with the skin).

[0005] Therefore, there is a need to improve the overall integrity and user comfort and convenience in the field of disposable medical and non-medical gloves. Even more challenging, meeting these physical and comfort requirements requires gloves that are easy to don, repairable, and gentle on the skin while maintaining the properties and functionality of medical and non-medical gloves. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] U.S. Patent No. 5,614,202 [Patent Document 2] U.S. Patent No. 5,869,072 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above circumstances, the present invention provides a moisturizing skin care coating and a method for preparing the same, as well as disposable moisturizing elastic gloves, to overcome problems such as excessive dryness of the skin on the hands caused by the inner surface of existing disposable elastic gloves that do not contain moisturizing ingredients, or stickiness of the skin on the hands and inconvenience in wearing the gloves when emulsions or creams are used as moisturizing ingredients. [Means for solving the problem]

[0008] The object of the present invention is to provide a moisturizing skin care coating and a method for preparing the same. The chitosan solution is obtained by removing 55% or more of chitosan dissolved in a citric acid aqueous solution using N-ethyl groups. This allows the chitosan to be uniformly dispersed in the moisturizing skin care coating, which can be applied to the inner surface of disposable moisturizing elastic gloves and effectively moisturize the skin when it comes into contact with the skin of the hand.

[0009] Specifically, the present invention provides a skin care coating comprising, calculated by the total weight of the coating, 2.65 wt% to 3.50 wt% chitosan solution, 85.40 wt% to 86.20 wt% moisturizing solution, and 11.10 wt% to 11.25 wt% additives. The chitosan solution is formed by dissolving chitosan having an N-ethyl removal rate of 55% or more and a density of 0.3 g / ml or more in an acidic aqueous solution. The acidic aqueous solution is a solution obtained by dissolving an organic acid in ion-exchanged water and having a pH value of less than 6.5. The moisturizing solution includes a carrier solution and at least one moisturizer, and the additive includes cellulose.

[0010] Specifically, the N-ethyl removal rate of chitosan can be 55% or more, preferably 55% to 95%, and more preferably 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, and the N-ethyl removal rate of chitosan can be within any two of the above ranges, but is not limited thereto.

[0011] Specifically, the density of chitosan can reach 0.3 g / ml or more, preferably 0.3 g / ml to 0.6 g / ml, more preferably 0.3 g / ml, 0.35 g / ml, 0.4 g / ml, 0.5 g / ml, or 0.6 g / ml, or between any two of the above values, but is not limited thereto.

[0012] According to an embodiment of the present invention, the organic acid may be selected from formic acid, acetic acid, adipic acid, lactic acid, citric acid, malic acid, propionic acid or succinic acid.

[0013] In one embodiment of the present invention, the organic acid is preferably citric acid. Citric acid is a weak organic acid that belongs to the polyacid category. Because polyacids are acids with multiple releasable hydrogen atoms, when citric acid is added to water, it gradually ionizes, i.e., gradually loses hydrogen atoms, forming hydrated ions (H3O+) in the solution when citric acid is mixed with water. Chitosan is a weakly alkaline substance and is insoluble in water and organic solvents. However, chitosan is soluble in weakly acidic aqueous solutions with a pH of 6.5 or less. This is due to the fact that chitosan is composed of glucosamine (a sugar derivative). In an acidic environment with a pH below 6.5, the acid imparts additional polarity or charge to the glucosamine units, converting them into a water-soluble form that is more easily able to interact with water molecules, effectively improving chitosan's solubility. Therefore, the decomposition and protonation process of chitosan in citric acid aqueous solution destroys the original intermolecular and intramolecular hydrogen bonds of chitosan and changes the molecular chain of chitosan through cross-linking with citric acid, so the solubility of chitosan in citric acid aqueous solution is better than that in aqueous solutions of other weak organic acids.

[0014] In one embodiment of the present invention, when the organic acid aqueous solution is a citric acid aqueous solution, the concentration of the citric acid aqueous solution may be 1.5 wt% to 17.5 wt%, and the weight ratio of chitosan to citric acid may be 1:4 to 1:1.

[0015] Specifically, the citric acid aqueous solution is prepared by mixing citric acid and deionized water. The concentration of the citric acid aqueous solution can be 1.5 wt%, 3.5 wt%, 5.5 wt%, 7.5 wt%, 9.5 wt%, 11.5 wt%, 13.5 wt%, 15.5 wt%, or 17.5 wt%. The concentration of the citric acid aqueous solution may be within the range of any two of the values described above, but is not limited thereto.

[0016] Specifically, the weight ratio of chitosan to citric acid is 1:4, 1:3, 1:2 or 1:1, and the weight ratio of chitosan to citric acid may be within the range of any two of the above values, but is not limited thereto.

[0017] According to an embodiment of the present invention, a method for preparing a moisturizing skin care coating includes adding chitosan with an N-ethyl removal rate of 55% or more and a density of 0.3 g / ml or more to an aqueous solution of citric acid, mixing, and stirring until dissolved, to obtain a chitosan solution, where the concentration of the aqueous solution of citric acid is 1.5 wt% to 17.5 wt%, and the weight ratio of chitosan to citric acid is 1:4 to 1:1.

[0018] At least one of a carrier solution and a moisturizing agent is prepared, and a moisturizing liquid formed from the carrier solution and the moisturizing agent is added to the chitosan solution, followed by stirring to obtain a mixed solution.

[0019] At least one kind of additive is prepared, and the additive is added one by one to the mixed solution, and the mixed solution is stirred until the additive is mixed and dissolved in the mixed solution, to obtain a moisturizing skin care coating.

[0020] Calculated based on the total weight of the skin care moisturizing material, the skin care moisturizing material contains 2.65 wt% to 3.50 wt% chitosan solution, 85.40 wt% to 86.20 wt% moisturizing liquid, and 11.10 wt% to 11.25 wt% additives.

[0021] According to an embodiment of the present invention, the humectant is selected from one or a combination of two or more of glycerin, sorbitol and dimethicone.

[0022] In one embodiment of the present invention, the humectant comprises glycerin. In another embodiment of the present invention, the humectant comprises glycerin and sorbitol. In another embodiment of the present invention, the humectant comprises glycerin and dimethicone. In another embodiment of the present invention, the humectant comprises glycerin, sorbitol, and dimethicone.

[0023] In one embodiment of the present invention, the content of glycerin, calculated based on the total weight of the moisturizing skin care coating, can be 0.05 wt% to 0.30 wt%, preferably 0.10 wt% to 0.20 wt%. In one embodiment of the present invention, the content of sorbitol, calculated based on the total weight of the moisturizing skin care coating, can be 0.10 wt% to 0.60 wt%, preferably 0.30 wt% to 0.40 wt%. In one embodiment of the present invention, the content of dimethicone oil, calculated based on the total weight of the moisturizing skin care coating, can be 0.10 wt% to 0.40 wt%, preferably 0.20 wt% to 0.30 wt%. In one embodiment of the present invention, the content of glycerin, sorbitol, and dimethicone, calculated based on the total weight of the moisturizing skin care coating, can be 0.1 wt%, 0.3 wt%, and 0.2 wt%, respectively.

[0024] According to an embodiment of the present invention, the carrier solution is an aqueous solution of citric acid with a concentration of 0.020 wt% to 0.120 wt%.

[0025] Specifically, the carrier solution is prepared by mixing citric acid and ion-exchanged water. Preferably, the carrier solution is an aqueous citric acid solution with a concentration of 0.020 wt%, 0.234 wt%, 0.024 wt%, 0.08182 wt%, 0.0848 wt%, or 0.085 wt%. The concentration of the carrier solution may be within the range of any two of the above values, but is not limited thereto.

[0026] According to an embodiment of the present invention, the additive is selected from one or a combination of two or more of cetylpyridinium chloride, silicone dispersion, preservative, triethanolamine (also known as TEA), and cellulose.

[0027] According to an embodiment of the present invention, cellulose is a cellulose thickener, also known as a gelling agent, used to increase the viscosity of latexes and liquids. The cellulose may be selected from one or a combination of two or more of methylcellulose, carboxymethylcellulose, carboxyethylcellulose, and carboxypropylmethylcellulose. In an embodiment of the present invention, the amount of cellulose added, calculated based on the total weight of the moisturizing skin care coating, may be 0.05 wt% to 0.50 wt%, preferably 0.10 wt% to 0.20 wt%. Specifically, the amount of cellulose added may be 0.05 wt%, 0.10 wt%, 0.15 wt%, 0.20 wt%, 0.25 wt%, 0.30 wt%, 0.40 wt%, or 0.50 wt%.

[0028] According to an embodiment of the present invention, triethanolamine (TEA), an alkaline pH adjuster, can be optionally added to the moisturizing skin care coating to adjust the final pH value of the moisturizing skin care coating and maintain the stability and efficacy of the coating formulation. In an embodiment of the present invention, the amount of triethanolamine added, calculated based on the total weight of the moisturizing skin care coating, can be 0 wt% to 0.60 wt%, preferably 0.35 wt% to 0.45 wt%. Specifically, the amount of triethanolamine added is 0.05 wt%, 0.10 wt%, 0.15 wt%, 0.30 wt%, or 0.40 wt%.

[0029] According to an embodiment of the present invention, the organosilicon emulsion is a type of polysiloxane emulsion or anti-sticking agent, and is optionally added to the moisturizing skin care coating to reduce the viscosity (or surface friction) of the rubber surface and make it easier to don the glove. According to an embodiment of the present invention, calculated based on the total weight of the moisturizing skin care coating, the amount of the organosilicon emulsion added can be 0.10 wt% to 0.40 wt%, preferably 0.20 wt% to 0.30 wt%. Specifically, the amount of the organosilicon emulsion added is 0.10 wt%, 0.15 wt%, 0.2 wt%, 0.30 wt%, or 0.40 wt%.

[0030] According to an embodiment of the present invention, cetylpyridine chloride is a cationic quaternary ammonium compound widely used in mouthwashes, toothpastes, lozenges, throat sprays, respiratory sprays, and nasal drops. Cetylpyridine chloride is also an antiseptic that kills bacteria and other microorganisms. Cetylpyridine chloride can be selectively added to moisturizing skin care coatings to enhance the wet-donning function of surgical gloves. In an embodiment of the present invention, the amount of cetylpyridine chloride added, calculated based on the total weight of the moisturizing skin care coating, can be 0.20 wt% to 0.60 wt%, preferably 0.30 wt% to 0.40 wt%. Specifically, the amount of cetylpyridine chloride added is 0.20 wt%, 0.30 wt%, 0.4 wt%, 0.50 wt%, or 0.60 wt%.

[0031] According to an embodiment of the present invention, a preservative can be selectively added to the moisturizing skin care coating to prevent microbial growth and reduce product deterioration, spoilage, and contamination. In an embodiment of the present invention, the preservative is selected from one or a combination of two or more of sodium benzoate, sodium hydroxymethylglycinate, triazine compounds, and 1,2-benzisothiazolin-3-one. In an embodiment of the present invention, the amount of the preservative added, calculated based on the total weight of the moisturizing skin care coating, can be 0.01 wt% to 0.10 wt%, preferably 0.04 wt% to 0.06 wt%. Specifically, the amount of the preservative added is 0.01 wt%, 0.02 wt%, 0.03 wt%, 0.04 wt%, 0.05 wt%, 0.06 wt%, 0.07 wt%, 0.08 wt%, 0.09 wt%, or 0.10 wt%.

[0032] According to an embodiment of the present invention, since the preferred pH value of most human skin is about 4.70 to 5.75, if the pH value of a skin care product applied to the skin surface is too high or too low, it may cause skin irritation, peeling, and inflammation. Therefore, in one embodiment of the present invention, the final pH value of the moisturizing skin care coating can be adjusted to about pH 4.50 to pH 6.00, and preferably, the final pH of the moisturizing skin care coating can be adjusted to about pH 4.77 to pH 5.70. More preferably, the final pH value of the moisturizing skin care coating can be adjusted to approximately pH 4.77, pH 4.8, pH 4.85, pH 4.9, pH 4.95, pH 5.0, pH 5.05, pH 5.1, pH 5.15, pH 5.2, pH 5.25, pH 5.3, pH 5.35, pH 5.4, pH 5.45, pH 5.5, pH 5.55, pH 5.65, or pH 5.7. The final pH value of the moisturizing skin care coating can be adjusted to, but is not limited to, a range consisting of any two of the above values.

[0033] According to an embodiment of the present invention, the total solids content of the moisturizing skin care coating of the present invention affects its effectiveness on the surface of human skin after application to the inner surface of a glove. For example, if the solids content is too high, too much coating may be applied to the inner surface of the glove, which may result in problems such as coating peeling, adhesion to the inner surface, and skin irritation. Conversely, if the solids content is too low, the skin care effect may be less pronounced or reduced. Therefore, in one embodiment of the present invention, the solids content (total solids, TSC, unit: wt%) of the moisturizing skin care coating may be 1.00 wt% to 1.50 wt%. Preferably, the solids content of the moisturizing skin care coating may be 1.20 wt% to 1.34 wt%. Preferably, the solids content of the moisturizing skin care coating can be 1.20 wt%, 1.21 wt%, 1.22 wt%, 1.23 wt%, 1.24 wt%, 1.25 wt%, 1.26 wt%, 1.27 wt%, 1.28 wt%, 1.29 wt%, 1.30 wt%, 1.31 wt%, 1.32 wt%, 1.33 wt%, or 1.34 wt%. The solids content of the moisturizing skin care coating can be within the range formed by any two of the values listed above, but is not limited to this.

[0034] A second objective of the present invention is to provide disposable moisturizing elastic gloves, whereby the inner surface of the gloves that comes into contact with the skin is coated with the aforementioned moisturizing skin care coating to form a dry coating, providing a good and uninterrupted wearing experience when the gloves are not in use or when the hands are dry. When sweat or water vapor migrates from the surface of the hand into the gap between the hand and the glove, the sweat or water vapor absorbs the dry coating, forming a moisturizing compress coating layer that provides moisture to the skin of the hand and provides moisturizing skin care.

[0035] To achieve the above objectives, the present invention provides a disposable moisturizing elastic glove, which includes a glove body having an inner surface that contacts the skin and a coating applied to the inner surface of the glove body. The coating is a dry coating formed by applying a moisturizing skin care coating to the inner surface of the glove body and drying. According to an embodiment of the present invention, the glove body of the disposable moisturizing elastic glove can be made of a rubber material. Preferably, the glove body may be made of synthetic rubber latex and / or natural rubber latex. Preferably, when the glove body is made of synthetic rubber latex, it can be selected from nitrile (NBR) latex, polyisoprene (IR) latex, chloroprene (CR) latex, or any of their polymer blends.

[0036] According to embodiments of the present invention, application of disposable moisturized elastic gloves can be achieved by online or offline methods. Online methods include online impregnation and / or online spraying, and offline methods include offline spraying and offline tumbling.

[0037] In one embodiment of the present invention, the manufacturing process for preparing disposable moisturized elastic gloves using the online impregnation method is broadly configured as follows. First, the inner surface (i.e., the donning surface) of a preformed glove body is exposed and immersed in an impregnation tank located on an impregnation production line containing a moisturizing skin care coating. After immersion and coating, the glove body and the surface of the coating are heated and dried together in a molding process, followed by a cooling process and demolding process before being removed from the impregnation production line. In other words, disposable moisturizing elastic gloves with a moisturizing skin care coating on the inner surface are completed. In this embodiment of the online impregnation method for preparing disposable moisturizing elastic gloves, no further offline processes are required.

[0038] In one embodiment of the present invention, the offline spraying method is an embodiment in which a moisturizing skin care coating is applied to the inner surface (i.e., the donning surface) of a glove body using a spray device. Specifically, the preparation process for preparing disposable moisturizing elastic gloves using the offline spraying method roughly includes the following steps: The inner surface (i.e., the donning surface) of a preformed glove body is exposed to the outside and placed in a drum equipped with a spray device. A moisturizing skin care coating is sprayed in a fine mist through an intermittent spraying and drying process to coat the inner surface of the glove body (at this time, the coating rotates outward to form on the outer surface). The moisturizing skin care coating is dried and shaped on the inner surface of the glove body by the spray and heating during tumbling. After cooling, the glove is removed from the drum equipped with the spray device. In other words, the preparation of disposable moisturizing elastic gloves with a moisturizing skin care coating on the inner surface is completed.

[0039] In one embodiment of the present invention, the manufacturing process for preparing disposable moisturized elastic gloves using an offline tumbling method roughly includes the following: The preformed glove body is placed in a drum with the inner surface (i.e., the donning surface) exposed, and then a flowing moisturizing skin care coating is filled into the drum. The flowing moisturizing skin care coating is applied to the inner surface of the glove body using a tumbling drum. The moisturizing skin care coating is then dry-molded onto the inner surface of the glove body by heating (e.g., by blowing hot air into the drum), and the glove is then cooled and removed from the drum. This completes the preparation of disposable moisturizing elastic gloves with a moisturizing skin care coating applied to the inner surface.

[0040] These and other objects, features and advantages of the present invention will be more fully embodied in the following detailed description and appended claims, and may be realized by means of the instrumentalities, devices and combinations particularly pointed out in the appended claims. [Effects of the Invention]

[0041] The present invention provides a moisturizing skin care coating and a manufacturing method thereof, as well as disposable moisturizing elastic gloves, so that the moisturizing skin care coating is evenly distributed on the inside of the gloves, providing a disposable wearing experience and achieving a moisturizing skin care effect. DETAILED DESCRIPTION OF THE INVENTION

[0042] Detailed embodiments of the present invention will now be disclosed. However, it should be understood that the disclosed embodiments are merely exemplary of the present invention, and that the present invention may be embodied in various alternative forms. Therefore, the embodiments recited herein are not intended to be limiting, but rather are based on the following claims and are representative principles for describing different embodiments to those skilled in the art. In order to facilitate understanding of the present invention, examples of the present invention are listed below, and several comparative examples are also provided for comparison, so that those skilled in the art can easily understand the advantages and effects that can be achieved by the present invention through the contents of the following comparative examples.

[0043] <<Moisturizing Skin Care Coating>>: Examples 1 to 4 (E1 to E4) The moisturizing skin care coatings of Examples 1-4 were prepared according to the methods described below and the proportions of Sample Codes E1-E4 shown in Table 1. First, calculate the total weight of the skin care moisturizing material, and provide the components of Examples 1 to 4 according to Table 1. Chitosan with an N-ethyl removal rate of 55% or more and a density of 0.3 g / ml or more is added to a citric acid aqueous solution prepared from citric acid and deionized water, and the mixture is stirred until the chitosan is mixed and dissolved to obtain a chitosan solution. Next, a moisturizing agent such as glycerin, sorbitol, or dimethicone is added to a carrier solution consisting of citric acid and ion-exchanged water to form a moisturizing solution, which is then added to the chitosan solution and stirred to obtain a mixed solution. Finally, add the additives, such as cetylpyridine chloride, silicone emulsion, preservatives, triethanolamine, and cellulose, one by one to the mixed solution. Rinse the small beaker or container used for measuring the ingredients with a small amount of deionized water (approximately 10 wt%) to ensure that all ingredients are completely transferred to the mixed solution and stirred and mixed. Stir until the additives are mixed and dissolved in the mixed solution, resulting in a moisturizing skin care coating. Table 1: Moisturizing skin care coating composition and proportion (wt%) of Examples 1 to 4 (E to E4) JPEG2025118120000001.jpg101130

[0044] <Moisturizing Skin Care Coating>: Comparative Examples 1-3 (C1-C3) Comparative Examples 1 and 2 (C1 and C2) First, Table 2 shows a comparison of the ingredients of Examples 1 and 2 based on the total weight of the skin care moisturizer. The entire amount of deionized water is then added to the beaker, and the other ingredients listed in Table 2 are added one by one with continuous stirring to form the composition. The composition is stirred at room temperature for at least about 60 minutes to form a stable, homogeneous solution and provide a moisturizing skin care coating. Comparative Example 3 First, the composition of Comparative Example 3 is shown in Table 2 based on the total weight of the skin care moisturizing material. Next, most of the ion-exchanged water (approximately 88.25 wt%) is added to the beaker and the composition is formed by continuously stirring while adding the other ingredients listed in Table 2 one by one. A small amount of deionized water (approximately 10 wt%) is reserved to rinse the small beaker or container used to measure the ingredients, ensuring that all ingredients are completely transferred to the beaker and stirred and mixed. The composition is stirred at room temperature for at least 60 minutes to form a stable, homogeneous solution. Table 2: Moisturizing skin care coating composition and proportion (wt%) of Examples 1 to 3 (C1 to C3) JPEG2025118120000002.jpg112141

[0045] Test Example 1: Solid content, pH value, and viscosity of moisturizing skin care coating The moisturizing skin care coatings of Examples 1 to 4 (E1 to E4) and Comparative Examples 1 to 3 (C1 to C3) were tested. The solids content, pH, and viscosity of each sample (E1 to E4 and C1 to C3) were determined according to Sections 8, 11, and 15 of ASTM D1076-02: Standard Specification for Rubber - Concentrated, Ammonia-Preserved, Creamed, and Centrifuged Natural Latex. The solid content test method in this test example was as follows. 1) 2.5±0.5 grams of moisturizing skin care coating sample is placed in a glass, tin-plated aluminum, flat-bottom cover, and plate and weighed to milligram accuracy. 2) Each moisturizing skin care coating sample is evenly distributed over an area of approximately 32 square centimeters (or 5 square inches). 3) Dry the sample of the aforementioned moisturizing skin care coating in a ventilated oven at 100±5°C for approximately 60 minutes. 4) Cover the dish, cool it in a desiccator at room temperature, and weigh it. 5) Repeat steps 1) to 4) twice, then dry to a constant weight with a tolerance of 1 mg, and calculate the average weight of the two runs according to the following formula: % Total Solids = Dry Weight of Moisture-Retaining Coating Material X 100 / (Wet Weight of Moisture-Retaining Coating Sample). The measurement results are shown in Table 3 below. As can be seen from Table 3, the solid content of Examples 1 to 4 (E1 to E4) was maintained at approximately 1.20% to 1.31%, respectively, and the viscosity was maintained between approximately 5 cps and 13 cps, respectively. In contrast, the solid content and viscosity of Comparative Example 1 (C1) were 1 to 4 times those of Examples 1 to 4, and therefore the viscosity of Comparative Example 1 was also significantly higher than those of Examples 1 to 4.

[0046] The results in Table 3 demonstrate that the solids content and viscosity ranges of the moisturizing skin care coatings in Examples 1 to 4 can effectively control the uniformity and overall thickness of the skin care coating applied to gloves. By uniformly applying an appropriate amount of skin care material to the glove surface, problems such as stickiness and peeling caused by applying too much skin care material to the surface can be prevented. Furthermore, it is reasonable to assume that the moisturizing skin care coating agent in Comparative Example 1 must have difficulty forming a uniform, thin film due to its high viscosity. As a result, the coating formed in Comparative Example 1 was prone to peeling, making the gloves difficult to don, and other problems that seriously affected the glove-wearing experience. Furthermore, the solid content and viscosity of Comparative Examples 2 and 3 (C2, C3) were lower than those of Examples 1 to 4, and therefore Comparative Examples 2 and 3 could not be applied uniformly to the surface of the glove due to insufficient leveling, insufficient adhesion, insufficient thickness of the coating film, etc., which indirectly affected the load capacity of the moisturizing skin care coating on the surface of the glove, and may result in poor moisturizing skin care function.

[0047] Table 3: Comparison of the solid content, pH value, viscosity, and other results determined in Test Example 1 for the moisturizing skin care coatings of Examples 1 to 4 (E1 to E4) and the moisturizing skin care coatings of Examples 1 to 3 (C1 to C3). JPEG2025118120000003.jpg51111

[0048] Disposable Moisture-Retaining Elastic Gloves: Examples 1A to 4A (E1A to E4A), Comparative Examples 1A to 3A (C1A to C3A) The disposable moisturizing elastic gloves of Examples 1A to 4A and Comparative Examples 1A to 3A were produced by the offline spray method described below. The preparation process for disposable moisturized elastic gloves prepared by the offline spray method generally includes the following: The inner surface of a preformed glove body (i.e., the inner surface that contacts the skin and is also the donning surface) is exposed to the outside and placed in a drum equipped with a spray device. Through intermittent spraying and drying processes, the moisturizing skin care coating of Examples 1-4 (E1-E4) and Comparative Examples 1-3 (C1-C3) is formed into a fine mist and sprayed. This applies the moisturizing skin care coating to the inner surface of the glove body (the outer surface is formed by turning it outward). The moisturizing skin care coating is dried and formed into the inner surface of the glove body by heating during the spraying and tumbling process. After cooling, the glove is removed from the drum equipped with the spray device, completing the production of disposable moisturizing elastic gloves of Examples 1A-4A (E1A-E4A) and Comparative Examples 1A-3A (C1A-C3A). The inner surface of the disposable moisturizing elastic gloves is coated with a dry coating formed from the moisturizing skin care coating of Examples 1-4 (E1-E4) and Comparative Examples 1-3 (C1-C3).

[0049] Test Example 2: Composition and content of active ingredients in the dry coating of disposable moisturizing elastic gloves The test samples in this test example were disposable moisturizing elastic gloves of Examples 1A to 4A (E1A to E4A) and Comparative Examples 1A to 3A (C1A to C3A). According to the test method of Test Example 1, the solids content of the dry coating of each tested sample (E1A to E4A and C1A to C3A) was determined. The results are shown in Table 4A below. Table 4B below shows the composition of the moisturizing skin care coating of Examples 1 to 4 (E to E4) and the total weight content (wt%) of the coating.

[0050] Table 4A: Comparison of dry coating solids for Examples 1A-4A (E1A-E4A) and Examples 1A-3A (C1A-C3A). JPEG2025118120000004.jpg17137Table 4B: Compositions of moisturizing skin care coatings of Examples 1 to 4 (E1 to E4) and their total weight contents (wt%). JPEG2025118120000005.jpg60137

[0051] As shown in Table 4C below, this test performed theoretical calculations based on the data in Tables 4A and 4B to obtain the ingredient contents of the moisturizing skin care coating calculated from the dry coating of each tested sample. Taking Example 1A as an example, the solids content of the dry coating formed by the moisturizing skin care coating in Example 1A was about 2.02% (as shown in Table 4A), and the chitosan content in the moisturizing skin care coating was about 0.10% (as shown in Table 4B), so the chitosan content in the dry coating was calculated to be (0.10 wt% / 2.02 wt%) × 100% = about 5%.

[0052] As can be seen from Table 4C, the dry coating active ingredient compositions of Examples 1A-4A (E1A-E4A) are superior to those of Comparative Examples 1A-3A (C1A-C3A). The comparison is as follows: 1. The chitosan content in Examples 1A-4A is higher than that in Comparative Examples 1A-3A, which may help the coating moisturizing function of Examples 1A-4A to last longer. Conversely, Comparative Examples 1A-3A do not have the function of sustaining moisturizing. 2. The chitosan in the moisturizing skin care coating formulas of Examples 1A to 4A is first dissolved in an aqueous solution of citric acid, which helps improve the solubility of chitosan and effectively improves the overall efficacy of the moisturizing skin care coating. In Comparative Examples 1A to 3A, the chitosan is not pre-dissolved in an aqueous solution of oleic acid or citric acid, so the chitosan does not completely dissolve in the skin care coating, affecting its overall skin care efficacy. 3. The moisturizing skin care coatings of Examples 1A to 4A contain dimethicone, but the coating of Comparative Example 1A does not contain dimethicone, so the coatings of Examples 1A to 4A have obvious brightening or whitening effects. 4. The coating formula of Comparative Example 1A contains hydroxypanthenol and gluconolactone, which have lower boiling points than glycerin and sorbitol, limiting the temperature at which the coating of Comparative Example 1A can be dried. Furthermore, the solids content and viscosity of the coating of Comparative Example 1A are higher than those of Examples 1A to 4A. This indicates that the coating of Comparative Example 1A is only suitable for offline processing, whereas the moisturizing skin care coatings of Examples 1A to 4A are more suitable for both online and offline production. Table 4C: Results of the active ingredient composition and content in the dry coating of disposable moisturizing elastic gloves determined in Examples 1A to 4A (E1A to E4A) and Comparative Examples 1A to 3A (C1A to C3A). JPEG2025118120000006.jpg65136

[0053] Test Example 3: Wearability (ease of donning) test of disposable moisturizing elastic gloves In this test, the disposable moisturizing elastic gloves of Examples 1A to 4A (E1A to E4A) and Comparative Examples 1A to 3A (C1A to C3A) were used as test samples. In this test example, a 10-member evaluation team was instructed to wear the sample gloves and test the wearing performance of each sample (E1A to E4A, C1A to C3A), i.e., verify the ease of wearing the gloves. First, team members donned the test glove samples with dry hands and rated the dry donning performance of each sample glove on a scale of 1 to 4, with "1 point" indicating poor or difficult donning and "4 point" indicating excellent donning performance or ease of donning. Next, team members donned the test sample gloves with wet hands and rated the wet donning performance of each sample glove on a scale of 1 to 4, with "1 point" indicating poor or difficult donning and "4 points" indicating excellent performance or ease of donning. The results are shown in Table 5 below. As can be seen from Table 5, the ease of use of the disposable moisturizing elastic gloves of Examples 1A to 4A (E1A to E4A) and Comparative Examples 1A to 3A (C1A to C3A) was comparable when worn dry, with a score of 3.5 points. However, when worn with wet hands, the disposable moisturizing elastic gloves of Examples 1A to 4A, whose inner surfaces were coated with the moisturizing skin care coatings of Examples 1 to 4 of the present invention, still maintained a rating of up to 3 points. On the other hand, the rating of the disposable moisturizing elastic gloves of Comparative Examples 1A and 2A, whose inner surfaces were coated with the moisturizing skin care coatings, significantly decreased. When comparing only the wet donning performance of Comparative Example 3A with Examples 1A to 4A, it also achieved 3 points. This is thought to be because the total amount of each component of the moisturizing skin care coating of Comparative Example 3A was the same or similar to the total amount of each component of the moisturizing skin care coatings of Examples 1 to 4 of the present invention, allowing it to maintain good donning performance even when worn wet.

[0054] It is also worth noting that the solid composition and viscosity of the moisturizing skin care coating of Example C1A are higher than those of the other coatings, which may be the reason why the moisturizing skin care coating loading of Example C1A glove is higher than that of the other gloves. And the high loading coating directly affects the viscosity of the glove surface, which reduces the wet donning function of the glove, so Example C1A receives the lowest wet donning score.

[0055] Table 5: Results of measurement of glove wearing performance in Test Example 3 for disposable moisturizing elastic gloves of Examples 1A to 4A (E1A to E4A) and Comparative Examples 1A to 3A (C1A to C3A). JPEG2025118120000007.jpg19137

[0056] Test Example 4: Moisturizing and whitening effect test of disposable moisturizing elastic gloves In this test example, the disposable moisturizing elastic gloves of Examples 1A to 4A (E1A to E4A) and Comparative Examples 1A to 3A (C1A to C3A) were used as test samples. In this test, the moisturizing and whitening effects were tested using the Ameni Skin Tester (brand name: Ameni, imate). The tester uses bioelectrical impedance pulse technology, with an inductive probe that senses the skin's condition. After the tester's probe is placed against the skin for three seconds, the detector's analyzer analyzes the data and calculates the skin's moisture content (moisturizing effect) and whiteness (whitening effect). The skin tester's reference values are 25% to 35% for hand moisture content and 76% to 99% for hand whiteness. In other words, the moisture content and whiteness measured by the skin tester must fall within the aforementioned ranges. The skin tester's reference values for skin moisture content and whiteness measured in summer have a ±3% error, while those measured in winter have a ±5% error. The results are shown in Table 6 below.

[0057] As can be seen from Table 6, the glove samples of Examples 1A to 4A, when coated on the inner surface with the moisturizing skin care coatings of Examples 1 to 4 (chitosan is first dispersed in a citric acid solution, and then other moisturizing ingredients and additives are added), show significantly better and longer-lasting moisturizing effects. This is because the moisturizing skin care coating made of chitosan is dispersed in the citric acid solution in advance, which allows the chitosan to disperse well and promotes the film-forming properties of the moisturizing skin care coating on the inner surface of the glove, providing significantly better moisturizing effects than the comparative examples after wearing.

[0058] Referring to Tables 1, 2 and 6, when comparing the glove of Comparative Example 1A with the gloves of Examples 1A to 3A, it can be seen that the moisturizing skin care coating of the glove of Comparative Example 1A and the moisturizing skin care coating of the gloves of Examples 1A to 3A have the same amount of chitosan added but are prepared by different methods. However, the moisturizing performance of the glove of Comparative Example 1A decreased by 65% after 60 minutes of testing. Not only was the moisturizing effect not measured at 70 minutes, but also the whitening effect of the glove of Comparative Example 1A was not detectable.

[0059] Referring to Tables 1, 2, and 6, the moisturizing skin care coatings of the gloves of Comparative Example 2A and Example 1A are compared. Under conditions where the total amount of each ingredient added is exactly the same but the preparation methods are different, the moisturizing effect of the gloves of Example 1A still reaches 100% after 60 minutes of testing, and even after 90 minutes of testing, it remains at a maximum of 60%. On the other hand, the moisturizing performance of the gloves of Comparative Example 2A not only declines to 85% after 60 minutes, but also has a low moisturizing effect of 39% after 90 minutes. Regarding whitening effect, the whiteness measured on the gloves of Example 1A was 88%, which falls within the range of the above-mentioned tester's better hand whiteness standard. However, the whiteness measured on the gloves of Comparative Example 2A was only 56%, which is below the lower limit (76%) of the above-mentioned tester's better hand whiteness standard range. From the above, it can be seen that Example 1A is superior to the gloves of Comparative Example 2A in moisturizing performance and whitening performance, since it is based on a preparation method in which chitosan is first dispersed in a citric acid solution and then other moisturizing ingredients and additives are added.

[0060] Referring to Tables 1, 2, and 6, the moisturizing skin care coatings of the gloves of Comparative Example 3A and Example 1A are similar, and the total amount of each ingredient added is similar, but the preparation methods are different. After 60 minutes of testing, the moisturizing effect of the gloves of Comparative Example 3A still reaches 100%, but after 90 minutes, the moisturizing effect drops sharply to 27%. This is much lower than that of the gloves of Example 1A, which still has a moisturizing effect of 60% even after 90 minutes of testing, indicating that the moisturizing skin care coating of the gloves of Comparative Example 3A does not have good moisturizing effect. In terms of whitening effect, the whiteness measured for the gloves of Comparative Example 3A is only 65%, which is not only much lower than the whiteness of the gloves of Example 1A (88%), but also lower than the lower limit of the range of better whiteness standards for the skin testers mentioned above (76%). From the above, it has been shown that Example 1A is superior to the gloves of Comparative Example 3A in moisturizing and whitening properties, since it is based on a preparation method in which chitosan is first dispersed in a citric acid solution and then other moisturizing ingredients and additives are added.

[0061] Table 6: Results of measurements of the moisturizing and whitening effects of disposable moisturizing elastic gloves of Examples 1A to 4A (E1A to E4A) and Comparative Examples 1A to 3A (C1A to C3A) worn in Test Example 4. JPEG2025118120000008.jpg50124

[0062] The specific examples described in the specification of the present invention are merely for the convenience of explaining the technical contents of the present invention, and the present invention is not limited to the above examples. Various modifications can be made without departing from the spirit of the present invention and the scope of the claims, and still fall within the scope of the present invention.

Claims

1. Calculated by the total weight of the moisturizing skin care coating. The composition comprises 2.65 wt% to 3.50 wt% of a chitosan solution, 85.40 wt% to 86.20 wt% of a moisturizing solution, and 11.10 wt% to 11.25 wt% of an additive; The chitosan solution is made from chitosan that is decomposed in an acidic aqueous solution with a removal rate of 55% or more and a density of 0.3 g / ml or more, the acidic aqueous solution being a solution with a pH value of less than 6.5 formed by dissolving an organic acid in deionized water, and the moisturizing solution includes a carrier solution and at least one moisturizing agent; The additive includes cellulose, The acidic aqueous solution of the moisturizing skin care coating is a citric acid aqueous solution formed by dissolving citric acid in ion-exchanged water, the concentration of the citric acid aqueous solution is 1.5 wt% to 17.5 wt%, and the weight ratio of the chitosan to the citric acid is 1:4 to 1:

1.

2. 10. The moisturizing skin care coating of claim 1, wherein the moisturizing agent is selected from one or a combination of two or more of glycerin, sorbitol, and dimethicone.

3. The moisturizing skin care coating of claim 1, wherein the carrier solution is an aqueous solution of citric acid with a concentration of 0.020 wt% to 0.120 wt%.

4. 10. The moisturizing skin care coating of claim 1, wherein the additive is selected from one or a combination of two or more of cetylpyridine chloride, silicone emulsion, preservative, triethanolamine, and cellulose.

5. The preparation method for moisturizing skin care coating includes the following steps: N-ethyl chitosan having a removal rate of 55% or more and a density of 0.3 g / ml or more is added to an aqueous citric acid solution and stirred until the chitosan is mixed and dissolved, thereby obtaining a chitosan solution, wherein the concentration of the aqueous citric acid solution is 1.5 wt% to 17.5 wt%, and the weight ratio of the chitosan to citric acid is 1:4 to 1:1; A carrier solution and at least one moisturizing agent are prepared, and a moisturizing liquid formed by the carrier solution and the moisturizing agent is added to the chitosan solution, and after stirring, a mixed solution is obtained; providing at least one additive, adding the additive one by one to the mixed solution, and stirring until the additive is mixed and dissolved in the mixed solution, thereby obtaining a moisturizing skin care coating; 1. A method for preparing a moisturizing skin care coating, wherein the moisturizing skin care coating comprises, based on the total weight of the moisturizing skin care coating, 2.65 wt% to 3.50 wt% of a chitosan solution, 85.40 wt% to 86.20 wt% of a moisturizing liquid, and 11.10 wt% to 11.25 wt% of additives.

6. 6. The method for preparing a moisturizing skin care coating according to claim 5, wherein the moisturizing agent is selected from one or a combination of two or more of glycerin, sorbitol, and dimethicone.

7. 7. The method for preparing a moisturizing skin care coating according to claim 5 or 6, wherein the carrier solution is an aqueous solution of citric acid with a concentration of 0.020 wt% to 0.120 wt%.

8. 6. The method for preparing a moisturizing skin care coating according to claim 5, wherein the additive is selected from one or a combination of two or more of cetylpyridine chloride, silicone emulsion, preservative, triethanolamine, and cellulose.

9. A disposable moisturizing elastic glove, The glove includes a glove body having an inner surface that contacts the skin, and a coating applied to the inner surface of the glove body, 6. A moisturizing elastic glove, characterized in that the coating is a dry coating formed by the moisturizing skin care coating according to any one of claims 1 to 5, which is applied to the inner surface of the glove body and dried.

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