Washing glove and preparation method thereof

Abstract

The invention provides washing gloves and a preparation method thereof. The preparation method comprises the following steps: A, preparing a sizing material and a coagulator; b, after the hand mold sleeved with the glove blank is preheated, the hand mold is sequentially soaked in a coagulating agent, soaked in a sizing material, subjected to glue uniformizing and flushed with water; and C, vulcanizing the flushed hand mold, and demolding to obtain the washable glove. According to the invention, the unique coagulator and sizing material are adopted, can be quickly and stably attached to the glove blank, and can not be washed away as far as possible when being flushed with water, so that the rubber consumption in the preparation process is reduced by 20%, and the cost is reduced by 30%. Furthermore, the total time of coagulating agent dipping, sizing material dipping, glue uniformizing and water flushing is controlled to be only 30-65 s by adopting the method, the preparation time is effectively shortened, the prepared washing gloves do not have the phenomena of glue penetration and glue leakage, the wear resistance of the washing gloves can reach 8000 revolutions or above, and the wear resistance grade can reach grade 4 according to an EN388 test.

Description

Technical Field

[0001] This invention relates to the field of security glove technology, specifically to a washable glove and its preparation method. Background Technology

[0002] Nitrile rubber work gloves possess excellent oil resistance, abrasion resistance, and wearing comfort. With a wide range of raw material sources, their usage has increased significantly in recent years. Consequently, various types of work gloves with knitted linings coated with nitrile rubber have been developed for use in various fields.

[0003] Washable gloves are manufactured using a rinsing process, specifically for work gloves with a knitted lining coated with a nitrile butadiene coating. However, during this process, rinsing removes about 60% of the adhesive, resulting in material waste and environmental pollution. Therefore, accurately removing the adhesive during the rinsing process is a pressing technical challenge. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a washable glove and a method for preparing the same.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] In a first aspect, the present invention provides a method for preparing washable gloves, comprising the following steps:

[0007] A. Prepare the adhesive and coagulant;

[0008] B. After preheating the hand mold with the glove blank, immerse it in the coagulant, immerse it in the adhesive, coat it evenly, and rinse it with water.

[0009] C. After rinsing the hand mold, vulcanize it and then demold to obtain the washable gloves.

[0010] As a preferred embodiment, in step A, the adhesive comprises the following components in the following mass percentages: 40-80% nitrile rubber, 5-30% water-washed PU adhesive, 1-6% zinc oxide, 2-10% sulfur, 0.5-5% KOH, 1-6% color paste, 0.1-3% thickener, and 0.1-3% surfactant.

[0011] As a preferred embodiment, the surfactant is at least one of nonylphenol polyoxyethylene ether, sodium fatty alcohol polyoxyethylene ether sulfate, sodium fatty alcohol polyoxyethylene ether, and disodium sulfosuccinate monoester.

[0012] As a preferred embodiment, the thickener is at least one of hydroxypropyl methylcellulose, sodium carboxymethylcellulose, sodium starch phosphate, and methylcellulose.

[0013] As a preferred embodiment, the viscosity of the adhesive is 6000-10000 mm² / s.

[0014] As a preferred embodiment, in step A, the coagulant is a mixture of at least one of calcium nitrate, acetic acid, carbonic acid, zinc chloride, and calcium chloride with an alcohol.

[0015] As a preferred embodiment, the mass concentration of at least one of calcium nitrate, acetic acid, carbonic acid, zinc chloride, and calcium chloride is 5-20%.

[0016] As a preferred embodiment, the alcohol is selected from at least one of methanol and ethanol.

[0017] As a preferred embodiment, in step B, the glove blank is woven from one or more of Johnson PE fiber, nylon fiber, polyester fiber, and spandex fiber using any one of the following processes: 13-needle, 15-needle, 18-needle, and 21-needle.

[0018] As a preferred embodiment, in step B, the preheating temperature of the glove blank is 35-65℃;

[0019] As a preferred embodiment, the total time for impregnating the coagulant, impregnating the adhesive, homogenizing the adhesive, and rinsing with water is 30-65 seconds.

[0020] As a preferred embodiment, in step C, the specific drying conditions are: first drying at 50-90℃ for 15-40 minutes, then drying at 90-150℃ for 40-90 minutes. Good results can be obtained by using the drying conditions of this invention.

[0021] Secondly, the present invention provides a washable glove prepared according to the aforementioned method.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention utilizes a unique coagulant and adhesive compound, which can quickly and firmly adhere to the glove blank, minimizing its removal during rinsing. This reduces adhesive usage by 20% and costs by 30% during preparation. Furthermore, the total time for impregnating the coagulant, impregnating the adhesive compound, homogenizing, and rinsing using this invention is only 30-65 seconds, effectively shortening the preparation time. The resulting washable gloves exhibit no adhesive leakage or seepage, and their abrasion resistance can reach over 8000 revolutions, achieving an abrasion resistance level of 4 according to EN388 testing. Attached Figure Description

[0024] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1This is a photograph of the washable gloves prepared in Example 1 of the present invention. Detailed Implementation

[0026] Unless otherwise defined, the technical or scientific terms used in this specification and claims shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. All values ​​listed herein, ranging from the minimum to the maximum, refer to all values ​​obtained by incrementing the minimum and maximum values ​​by one unit when the difference between the minimum and maximum values ​​is more than two units.

[0027] The following describes specific embodiments of this application. It should be noted that, in order to provide a concise description, this specification cannot provide a detailed description of all features of the actual embodiments. Without departing from the spirit and scope of this application, those skilled in the art can modify and substitute the embodiments of this application, and the resulting embodiments are also within the protection scope of this application.

[0028] Example

[0029] The embodiments of this application will be described in detail below. These embodiments are implemented based on the technical solution of this application, and detailed implementation methods and specific operation processes are given. However, the protection scope of this application is not limited to the following embodiments.

[0030] In the following embodiments, all raw materials and reagents used were prepared by conventional methods or obtained by purchasing commercially available products. This invention does not impose any special limitations.

[0031] Example 1

[0032] This embodiment provides a method for preparing washable gloves, the specific steps of which are as follows:

[0033] 1. Weigh each component according to the following mass percentages, mix and stir evenly to prepare the adhesive compound:

[0034] The composition is as follows: 64% nitrile rubber, 20% water-washed PU adhesive, 3% zinc oxide, 5% sulfur, 3% KOH, 2% black pigment, 1% thickener (hydroxypropyl methylcellulose), and 2% surfactant (sodium fatty alcohol polyoxyethylene ether sulfate).

[0035] 2. Prepare a calcium nitrate-methanol solution with a calcium nitrate mass concentration of 10% as a coagulant.

[0036] 3. Place the adhesive and coagulant in the barrel.

[0037] 4. Use Johnson PE fiber to knit a glove blank with 15 stitches, then put the glove blank on the hand mold. After preheating the hand mold to 45°C, impregnate it with coagulant, impregnate it with rubber, homogenize the glue, and rinse it with water in sequence. Control the total time for impregnation with coagulant, impregnation with rubber, homogenization and rinsing with water to be 45 seconds.

[0038] 5. After rinsing, the hand mold is vulcanized in two ovens in sequence. The temperature of the first oven is 60℃ and the time is 20 minutes; the temperature of the second oven is 110℃ and the time is 60 minutes.

[0039] 6. Cool and demold to obtain washable gloves. (Glove photo shown) Figure 1 As shown, there is no glue leakage or seepage.

[0040] Example 2

[0041] This embodiment provides a method for preparing washable gloves, the specific steps of which are as follows:

[0042] 1. Weigh each component according to the following mass percentages, mix and stir evenly to prepare the adhesive compound:

[0043] The composition is as follows: 44% nitrile rubber, 30% water-washed PU adhesive, 6% zinc oxide, 10% sulfur, 5% KOH, 1% black pigment, 3% thickener (hydroxypropyl methylcellulose), and 1% surfactant (sodium fatty alcohol polyoxyethylene ether sulfate).

[0044] 2. Prepare an acetic acid-ethanol solution with a mass concentration of 20% as a coagulant.

[0045] 3. Place the adhesive and coagulant in the barrel.

[0046] 4. Use nylon fiber to knit a glove blank with 21 stitches, then put the glove blank on the hand mold. After preheating the hand mold to 35°C, impregnate it with coagulant, impregnate it with rubber, homogenize the glue, and rinse it with water in sequence. Control the total time for impregnation with coagulant, impregnation with rubber, homogenization, and rinsing with water to be 65 seconds.

[0047] 5. After rinsing, the hand mold is vulcanized in two ovens in sequence. The temperature of the first oven is 90℃ and the time is 15 minutes; the temperature of the second oven is 150℃ and the time is 40 minutes.

[0048] 6. Cool and demold to obtain washable gloves. The gloves show no glue leakage or seepage.

[0049] Example 3

[0050] This embodiment provides a method for preparing washable gloves, the specific steps of which are as follows:

[0051] 1. Weigh each component according to the following mass percentages, mix and stir evenly to prepare the adhesive compound:

[0052] The composition is as follows: 70% nitrile rubber, 15% water-washed PU adhesive, 2% zinc oxide, 3% sulfur, 3% KOH, 6% black pigment, 0.9% thickener (hydroxypropyl methylcellulose), and 0.1% surfactant (sodium fatty alcohol polyoxyethylene ether sulfate).

[0053] 2. Prepare a carbonic acid-ethanol solution with a carbonic acid mass concentration of 15% as a coagulant.

[0054] 3. Place the adhesive and coagulant in the barrel.

[0055] 4. Use polyester fiber to knit a glove blank with 15 stitches, then put the glove blank on the hand mold. After preheating the hand mold to 55°C, impregnate it with coagulant, impregnate it with rubber, coat it with glue, and rinse it with water in sequence. Control the total time for impregnation with coagulant, impregnation with rubber, coating with glue, and rinsing with water to be 40 seconds.

[0056] 5. After rinsing, the hand mold is vulcanized in two ovens in sequence. The temperature of the first oven is 70℃ and the time is 30 minutes; the temperature of the second oven is 130℃ and the time is 70 minutes.

[0057] 6. Cool and demold to obtain washable gloves. The gloves show no glue leakage or seepage.

[0058] Example 4

[0059] This embodiment provides a method for preparing washable gloves, the specific steps of which are as follows:

[0060] 1. Weigh each component according to the following mass percentages, mix and stir evenly to prepare the adhesive compound:

[0061] The composition is as follows: 80% nitrile rubber, 10% water-washed PU adhesive, 1% zinc oxide, 2% sulfur, 0.5% KOH, 4.4% black pigment, 0.1% thickener (sodium starch phosphate), and 2% surfactant (nonylphenol polyoxyethylene ether).

[0062] 3. Prepare a zinc chloride-ethanol solution with a zinc chloride mass concentration of 5% as a coagulant.

[0063] 3. Place the adhesive and coagulant in the barrel.

[0064] 4. Use polyester fiber to knit a glove blank with 15 stitches, then put the glove blank on the hand mold. After preheating the hand mold to 65°C, impregnate it with coagulant, impregnate it with rubber, coat it with glue, and rinse it with water in sequence. Control the total time for impregnation with coagulant, impregnation with rubber, coating with glue, and rinsing with water to be 30 seconds.

[0065] 5. After rinsing, the hand mold is vulcanized in two ovens in sequence. The temperature of the first oven is 50℃ and the time is 40 minutes; the temperature of the second oven is 90℃ and the time is 90 minutes.

[0066] 7. Cool and demold to obtain washable gloves. The gloves show no glue leakage or seepage.

[0067] Comparative Example 1

[0068] This comparative example provides a method for preparing washable gloves. The specific steps are basically the same as in Example 4, except that in step 2 of this comparative example, a zinc chloride-ethanol solution with a zinc chloride mass concentration of 2% is used as a coagulant. The washable gloves prepared using this comparative example exhibit glue leakage.

[0069] Comparative Example 2

[0070] This comparative example provides a method for preparing washable gloves. The specific steps are basically the same as in Example 2, except that in step 2 of this comparative example, an acetic acid-ethanol solution with a mass concentration of 25% acetic acid is used as a coagulant. The gloves prepared using this comparative example show no glue leakage or seepage.

[0071] Comparative Example 3

[0072] This comparative example provides a method for preparing washable gloves. The specific steps are basically the same as those in Example 2, except that in step 1 of this comparative example, each component is weighed according to the following mass percentages, mixed and stirred evenly to prepare the adhesive:

[0073] Acrylonitrile rubber 45%, water-washed PU rubber 30%, zinc oxide 6%, sulfur 10%, KOH 5%, black pigment 1%, thickener (hydroxypropyl methylcellulose) 3%.

[0074] The gloves prepared using this comparative example exhibited glue leakage.

[0075] Comparative Example 4

[0076] This comparative example provides a method for preparing washable gloves. The specific steps are basically the same as those in Example 4, except that in step 1 of this comparative example, each component is weighed according to the following mass percentages, mixed and stirred evenly to prepare the adhesive:

[0077] The formula consists of 90% nitrile rubber, 1% zinc oxide, 2% sulfur, 0.5% KOH, 4.4% black pigment, 0.1% thickener (sodium starch phosphate), and 2% surfactant (nonylphenol polyoxyethylene ether).

[0078] The gloves prepared using this comparative example exhibit glue leakage.

[0079] Comparative Example 5

[0080] This comparative example provides a method for preparing washable gloves. The specific steps are basically the same as those in Example 2, except that in step 1 of this comparative example, each component is weighed according to the following mass percentages, mixed and stirred evenly to prepare the adhesive:

[0081] The composition is as follows: 64% nitrile rubber, 20% water-washed PU adhesive, 3% zinc oxide, 5% sulfur, 3% KOH, 2% black pigment, 1% thickener (hydroxypropyl methylcellulose), and 2% surfactant (sodium dodecylbenzenesulfonate).

[0082] The gloves prepared using this comparative example exhibit glue leakage.

[0083] Performance testing:

[0084] The abrasion resistance of the washable gloves prepared in each embodiment and comparative example was tested using the EN388:2016 method, and the results are shown in Table 1.

[0085] Table 1

[0086] silicone Abrasion resistance rating Example 1 4 Example 2 4 Example 3 4 Example 4 4 Comparative Example 1 2 Comparative Example 2 3 Comparative Example 3 2 Comparative Example 4 2 Comparative Example 5 3

[0087] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method of making a water wash glove characterized by, Includes the following steps: A. Prepare the adhesive and coagulant; B. After preheating the hand mold with the glove blank, immerse it in the coagulant, immerse it in the adhesive, coat it evenly, and rinse it with water. C. After rinsing the hand mold, vulcanize it and then demold to obtain the washable gloves.

2. The method of making a water washed glove according to claim 1, wherein, In step A, the adhesive comprises the following components in the following mass percentages: 40-80% nitrile rubber, 5-30% water-washed PU adhesive, 1-6% zinc oxide, 2-10% sulfur, 0.5-5% KOH, 1-6% color paste, 0.1-3% thickener, and 0.1-3% surfactant.

3. The method of making a water washed glove according to claim 2, wherein, The surfactant is at least one of nonylphenol polyoxyethylene ether, sodium fatty alcohol polyoxyethylene ether sulfate, sodium fatty alcohol polyoxyethylene ether, and disodium sulfosuccinate monoester.

4. The method of manufacturing a water washed glove according to claim 2, wherein, The thickener is at least one of hydroxypropyl methylcellulose, sodium carboxymethylcellulose, sodium starch phosphate, and methylcellulose.

5. The method of making a water washed glove according to any one of claims 1-4, wherein, The viscosity of the sizing is 6000-10000 mm 2 / s.

6. The process for producing a water washed glove according to claim 1, characterized by, In step A, the coagulant is a mixture of at least one of calcium nitrate, acetic acid, carbonic acid, zinc chloride, and calcium chloride with an alcohol; The mass concentration of at least one of the following: calcium nitrate, acetic acid, carbonic acid, zinc chloride, and calcium chloride is 5-20%. The alcohol is selected from at least one of methanol and ethanol.

7. The process for producing a water washed glove according to claim 1, characterized by, In step B, the glove blank is woven from one or more of Johnson PE fiber, nylon fiber, polyester fiber, and spandex fiber using any one of the following processes: 13-needle, 15-needle, 18-needle, and 21-needle.

8. The method of making a water washed glove according to claim 1, wherein, In step B, the preheating temperature of the glove blank is 35-65℃; The total time for impregnating the coagulant, impregnating the adhesive, homogenizing the adhesive, and rinsing with water is 30-65 seconds.

9. The process for producing a water washed glove according to claim 1, characterized by, In step C, the specific drying conditions are as follows: first dry at 50-90℃ for 15-40 minutes, then dry at 90-150℃ for 40-90 minutes.

10. A washable glove prepared by the method according to any one of claims 1-9.

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