A kind of production method and equipment of hand-free gel

Abstract

The invention discloses a production method and equipment for hand-free gel. A hand-free gel equipment includes a pure water unit, a high-position dispersion kettle, a main dispersion stirring kettle, an online viscometer, a condenser, a high-position metering cylinder, an alcohol recovery tank, a circulating water inlet pipe, a circulating water return pipe, a first tube body, a second tube body and a third tube body; the end of the circulating water inlet pipe is connected to the pure water unit, the output end of the pure water unit is connected to the high-position dispersion kettle through the first tube body, the discharge port is connected to the main dispersion stirring kettle through the second tube body, the condenser is connected to the main dispersion stirring kettle, the condensation branch pipe is connected to the circulating water inlet pipe, the drain pipe is connected to the circulating water return pipe, the high-position metering cylinder is connected to the main dispersion stirring kettle through the third tube body, the online viscometer is provided with a test tube, and the online viscometer is connected to the main dispersion stirring kettle through the test tube. The beneficial effects are: reducing production costs, ensuring 100% qualified product output; and effectively reducing the loss of edible alcohol.

Description

Technical Field

[0001] The invention relates to the technical field of hand-free gel, in particular to a production method and equipment of hand-free gel. Background Art

[0002] Hand sanitizer gels include alcohol gels, but most of the gels produced have the risk of leakage during storage and transportation when the gel viscosity is too low because the gel fluidity is too good; when the gel viscosity is too high, the user will feel sticky after applying it on the hands because the evaporation speed is slow. In addition, in the process of processing the gel, the prior art does not recycle the alcohol used in the production of hand sanitizer gel, which greatly increases the processing cost of hand sanitizer gel;

[0003] In addition, many hand sanitizer gels on the market, especially alcohol-containing disinfectant gel products, have pH values ​​between 5.5 and 6.5, which are slightly acidic. In the "multiple complete skin irritation test", the closer the pH value is to neutral 7, the gentler and less irritating it is to the hands. Summary of the invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to provide a device for making hand-free gel that can effectively control the viscosity of the gel during the normal production process.

[0005] Another object of the present invention is to provide a production method for the above-mentioned hand-free gel, which ensures that 100% of the hand-free gel is produced as qualified products with good product quality.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A production equipment for hand-free gel, comprising a pure water unit, a high-position dispersion kettle, a main dispersion stirring kettle, an online viscometer, a condenser, a high-position metering cylinder, an alcohol recovery tank, a circulating water inlet pipe, a circulating water return pipe, a first pipe body, a second pipe body and a third pipe body;

[0008] The end of the circulating water inlet pipe is connected to the pure water unit, the output end of the pure water unit is connected to the high-position dispersion kettle through the first tube body, the discharge port of the high-position dispersion kettle is connected to the main dispersion stirring kettle through the second tube body, and the end of the second tube body is provided with a first filter, the condenser is connected to the main dispersion stirring kettle, the condenser is provided with a condensation branch pipe, the condensation branch pipe is connected to the circulating water inlet pipe, the condensation branch pipe is provided with a control valve, the condenser is provided with a drain pipe, the drain pipe is connected to the circulating water return pipe, the high-position metering cylinder is connected to the main dispersion stirring kettle through the third tube body, the online viscometer is arranged on either side of the main dispersion stirring kettle, the online viscometer is provided with a test tube, the end of the test tube is provided with a driving pump, and the online viscometer is connected to the main dispersion stirring kettle through the test tube.

[0009] Preferably, in the above-mentioned production equipment for hand-free gel, a constant temperature water cylinder is provided on any side of the main dispersing stirring tank, at least one constant temperature branch pipe is provided near the head end of the circulating water inlet pipe, the constant temperature branch pipe is connected to the constant temperature water cylinder, the constant temperature water cylinder is provided with a fourth tube body, at least one circulating pump is provided at the head end of the fourth tube body, and the constant temperature water cylinder is connected to the jacket of the main dispersing stirring tank through the fourth tube body.

[0010] Preferably, in the above-mentioned production equipment for hand-free gel, the jacket of the main dispersing stirring kettle is provided with a reflux pipe, and the main dispersing stirring kettle is connected to the constant temperature water cylinder through the reflux pipe.

[0011] Preferably, in the above-mentioned production equipment for hand-free gel, an alcohol recovery tank is provided on either side of the condenser, the alcohol recovery tank is connected to the condenser, an introduction pipe is provided on one side of the alcohol recovery tank, and the alcohol recovery tank is connected to the main dispersing stirring tank through the introduction pipe.

[0012] Preferably, in the above-mentioned production equipment for hand-free gel, the discharge port of the main dispersing stirring kettle is provided with a discharge pipe, and the end of the discharge pipe is provided with a second filter.

[0013] Preferably, in the production equipment of the hand-free gel, an automatic packaging machine is provided on either side of the main dispersing stirring kettle, and the feed end of the automatic packaging machine is connected to the main dispersing stirring kettle through the discharge pipe.

[0014] Preferably, the above-mentioned production equipment for hand-free gel is provided with a booster pump near the end of the circulating water inlet pipe.

[0015] A method for producing a hand-free gel, wherein the production steps include:

[0016] Gel powder dissolving solution preparation stage:

[0017] S1: Deliver an appropriate amount of pure water with a conductivity of less than 5.1 to the high-position dispersion kettle;

[0018] S2: adding the water-retaining gel powder and the thickening gel powder into pure water in sequence, dissolving and dispersing at high speed until the mixed material is completely swollen to obtain a gel powder solution, and then stopping the machine to stand and mature for more than 12 hours for standby use;

[0019] PH regulator solution preparation stage:

[0020] S3: diluting the pH regulator with an appropriate amount of pure water, filtering to obtain a pH regulator solution, and transferring the pH regulator solution into a high-position metering cylinder for standby use;

[0021] Mixing preparation stage:

[0022] S4: adding an appropriate amount of filtered and impurity-free food-grade alcohol into the main dispersing stirring kettle, extracting an appropriate amount of the gel powder solution from the high-position dispersing kettle, filtering, and adding to the main dispersing stirring kettle, and stirring the main dispersing stirring kettle at a speed of 100-200 rpm until the materials are uniformly stirred to obtain a secondary mixed material;

[0023] S5: adjusting the rotation speed of the main dispersing stirring kettle, reading the initial viscosity of the secondary mixed material with an online viscometer, and slowly adding the pH regulator solution to the main dispersing stirring kettle using the high-level metering cylinder according to the viscosity test result, until the viscosity of the mixed material reaches a preset range, stopping stirring, and obtaining a gel solution;

[0024] S6: testing the pH value of the gel solution by sampling, and when the pH value is within the set neutral range, the gel solution is qualified, and the qualified product is filtered and packaged by a second filter and an automatic packaging machine;

[0025] The gel powder dissolving solution preparation stage and the pH regulator solution preparation stage are performed in no particular order.

[0026] Preferably, in the above-mentioned method for producing hand-free gel, the step S5 further comprises the following steps: when the viscosity of the online viscometer is displayed in the range of 6500-7000 cps / °C, stop slowly dripping the pH regulator solution into the main dispersing stirring tank;

[0027] The step S4 also includes the following steps: the alcohol is an edible alcohol solution with a purity of 75%.

[0028] Preferably, in the above-mentioned method for producing hand-free gel, step S6 further comprises the following contents:

[0029] The pH value of the gel solution is detected by sampling. When the pH value is not within the set neutral range, it is a defective product. The defective product is subjected to the steps S5 and S6 in sequence until it is re-tested as a qualified product and then filtered and packaged.

[0030] Beneficial effects of the present invention:

[0031] (1) It first produces pure water through a pure water unit, and then transports the pure water to a high-level dispersing kettle according to the formula amount through a first pipe body, and sequentially adds a gel powder with water retention and a gel powder with thickening properties into the pure water according to the formula amount, and then dissolves and matures the gel powder through a high-speed dispersing kettle at high speed, and then puts the filtered and impurity-removed alcohol into a main dispersing stirring kettle, and then adds the formulated amount of matured gel powder solution from the high-level dispersing kettle, and then starts the main kettle to rotate, and after stirring and mixing evenly, the pH regulator solution is slowly added to the main dispersing stirring kettle by the high-level metering cylinder until the viscosity of the mixed material reaches a preset range, and then the stirring is stopped to obtain a gel solution, and the viscosity and pH value of the gel solution in the main dispersing stirring kettle are recorded and adjusted by an online viscometer. Such a design can monitor the viscosity online, avoid the possible cross contamination of materials in the central control link, reduce production costs, and ensure 100% qualified product output.

[0032] (2) The main dispersing stirring kettle will naturally heat up during the stirring process, causing the alcohol in the main dispersing stirring kettle to volatilize. Since the main dispersing stirring kettle is connected to the condenser, the alcohol vapor can be cooled into alcohol liquid. This design can effectively reduce the loss of edible alcohol and ensure the formula feed amount and the disinfection and antibacterial effect of the gel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] Wherein: it includes: pure water unit 11, high-level dispersion kettle 12, main dispersion stirring kettle 13, online viscometer 14, condenser 15, high-level metering cylinder 16, alcohol recovery tank 17, introduction pipe 171, circulating water inlet pipe 18, circulating water return pipe 19, first tube body 22, second tube body 23, third tube body 24, first filter 25, condensation branch pipe 26, control valve 27, drain pipe 28, test tube 29, drive pump 30, constant temperature water cylinder 33, constant temperature branch pipe 34, fourth tube body 35, circulation pump 36, reflux pipe 37, discharge pipe 38, second filter 44, automatic packaging machine 45, booster pump 46. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figure 1As shown, a production equipment for hand-free gel includes a pure water unit 11, a high-level dispersion kettle 12, a main dispersion stirring kettle 13, an online viscometer 14, a condenser 15, a high-level metering cylinder 16, an alcohol recovery tank 17, a circulating water inlet pipe 18, a circulating water return pipe 19, a first tube body 22, a second tube body 23 and a third tube body 24;

[0037] The end of the circulating water inlet pipe 18 is connected to the pure water unit 11, the output end of the pure water unit 11 is connected to the high-position dispersion kettle 12 through the first tube body 22, the discharge port of the high-position dispersion kettle 12 is connected to the main dispersion stirring kettle 13 through the second tube body 23, and the end of the second tube body 23 is provided with a first filter 25, the condenser 15 is connected to the main dispersion stirring kettle 13, the condenser 15 is provided with a condensation branch pipe 26, the condensation branch pipe 26 is connected to the circulating water inlet pipe 18, the condensation branch pipe 26 is provided with a control valve 27, the condenser 15 is provided with a drain pipe 28, the drain The water pipe 28 is connected to the circulating water return pipe 19, the high-level metering cylinder 16 is connected to the main dispersing stirring kettle 13 through the third pipe body 24, the online viscometer 14 is arranged on either side of the main dispersing stirring kettle 13, the online viscometer 14 is provided with a test tube 29, the end of the test tube 29 is provided with a driving pump 30, and the online viscometer 14 is connected to the main dispersing stirring kettle 13 through the test tube 29; in the gel production process, firstly, pure water is produced by the pure water unit 11, and the pure water is transported to the high-level dispersing kettle 12 according to the formula through the first pipe body 22, and the water-retaining gel is The powder and thickening gel powder are sequentially added into the pure water according to the formula amount, and the high-position dispersing kettle 12 is used for high-speed dispersing and dissolving and standing for maturation. The filtered and impurity-removed alcohol is added into the main dispersing stirring kettle 13, and the formula amount of the matured gel powder solution is added from the high-position dispersing kettle 12. The main kettle is started and rotated. After stirring and mixing evenly, the PH regulator solution is slowly added to the main dispersing stirring kettle 13 by using the high-position metering cylinder until the viscosity of the mixed material reaches the preset range, and the stirring is stopped to obtain the gel solution. The viscosity of the main dispersing stirring kettle 13 is recorded and adjusted by the online viscometer 14. The viscosity and pH value of the inner gel liquid. Such a design can monitor the viscosity online and avoid the possible cross-contamination of materials in the central control link, reducing production costs and ensuring 100% qualified product output; the main dispersing stirring kettle 13 will naturally heat up during the stirring process, causing the alcohol in the main dispersing stirring kettle 13 to volatilize. Since the main dispersing stirring kettle 13 is connected to the condenser 15, the alcohol volatilization vapor can be cooled into alcohol liquid. Such a design can effectively reduce the loss of edible alcohol and ensure the formula feed amount and the disinfection and antibacterial effect of the gel.

[0038] The production equipment of the hand-free gel in the present invention, wherein a constant temperature water cylinder 33 is arranged on any side of the main dispersing stirring kettle 13, at least one constant temperature branch pipe 34 is arranged near the head end of the circulating water inlet pipe 18, the constant temperature branch pipe 34 is connected to the constant temperature water cylinder 33, the constant temperature water cylinder 33 is provided with a fourth tube body 35, and at least one circulating pump 36 is arranged at the head end of the fourth tube body 35. The constant temperature water cylinder 33 is connected to the jacket of the main dispersing stirring kettle 13 through the fourth tube body 35. Since the constant temperature water cylinder 33 is connected to the jacket of the main dispersing stirring kettle 13, such a design can maintain a constant room temperature of the main dispersing stirring kettle 13, so that the viscosity data measured by the online viscometer 14 is more accurate.

[0039] In the production equipment of the hand-free gel of the present invention, the jacket of the main dispersing stirring kettle 13 is provided with a reflux pipe 37, and the main dispersing stirring kettle 13 is connected to the constant temperature water cylinder 33 through the reflux pipe 37. The design of the reflux pipe 37 can cooperate with the fourth tube body 35 to form a reflux channel, which can better maintain the constant temperature of the main dispersing stirring kettle 13.

[0040] In the production equipment of the hand-free gel of the present invention, an alcohol recovery tank 17 is arranged on either side of the condenser 15, the alcohol recovery tank 17 is connected to the condenser 15, an introduction pipe 171 is arranged on one side of the alcohol recovery tank 17, and the alcohol recovery tank 17 is connected to the main dispersing stirring tank 13 through the introduction pipe 171. Such a design facilitates the condenser 15 to cool the alcohol vapor into alcohol liquid, and then flow it back to the alcohol recovery tank 17 for storage, and when alcohol is needed again, the recovered alcohol can be used preferentially, and the recovered alcohol can be introduced into the main dispersing stirring tank 13 through the introduction pipe 171, so that the alcohol is not easy to spill and is safer, and the formula feed amount and the disinfection and antibacterial effect of the gel can also be ensured.

[0041] In the production equipment of the hand-free gel of the present invention, the discharge port of the main dispersing stirring kettle 13 is provided with a discharge pipe 38, and the end of the discharge pipe 38 is provided with a second filter 44. The material discharged from the discharge port is filtered for the second time through the second filter 44. Such a design makes the product quality better.

[0042] The production equipment of the hand-free gel in the present invention is provided with an automatic packaging machine 45 on either side of the main dispersing stirring kettle 13, and the feeding end of the automatic packaging machine 45 is connected to the main dispersing stirring kettle 13 through a discharge pipe 38. When the product production is completed, the main dispersing stirring kettle 13 flows the finished product into the automatic packaging machine 45 through the discharge pipe 38, and the automatic packaging machine 45 automatically performs packaging and packaging. Such a design has a high degree of automation and improves work efficiency.

[0043] In the production equipment of the hand-free gel of the present invention, a booster pump 46 is arranged near the end of the circulating water inlet pipe 18. Such a design can increase the pressure of the circulating water inlet pipe 18, thereby increasing the water intake of the circulating water inlet pipe 18.

[0044] A method for producing a hand-free gel, wherein the production steps include:

[0045] Preparation stage of gel powder dissolving solution:

[0046] S1: delivering an appropriate amount of pure water with a conductivity of less than 5.1 to the high-position dispersion kettle 12;

[0047] S2: adding the water-retaining gel powder and the thickening gel powder into pure water in sequence, dissolving and dispersing at high speed until the mixed material is completely swollen to obtain a gel powder solution, and then stopping the machine to stand and mature for more than 12 hours for standby use;

[0048] PH regulator solution preparation stage:

[0049] S3: diluting the pH regulator with an appropriate amount of pure water, filtering to obtain a pH regulator solution, and transferring the pH regulator solution into a high-level metering cylinder for standby use;

[0050] Mixing preparation stage:

[0051] S4: Add an appropriate amount of filtered and impurity-free food-grade alcohol into the main dispersing stirring kettle 13, extract an appropriate amount of gel powder solution from the high-position dispersing kettle, filter it, and add it to the main dispersing stirring kettle 13, and stir the main dispersing stirring kettle 13 at a speed of 100-200 rpm until the materials are uniformly stirred to obtain a secondary mixed material;

[0052] S5: adjusting the rotation speed of the main dispersing stirring tank 13, reading the initial viscosity of the secondary mixed material by the online viscometer 14, and slowly adding the pH regulator solution to the main dispersing stirring tank 13 by using the high-level metering cylinder according to the viscosity test result, until the viscosity of the mixed material reaches within a preset range, stopping stirring, and obtaining a gel solution;

[0053] S6: The pH value of the gel liquid is detected by sampling. When the pH value is within the set neutral range, the gel liquid is qualified. The qualified product is filtered and packaged by the second filter 44 and the automatic packaging machine;

[0054] The gel powder solution preparation stage and the pH regulator solution preparation stage are not prioritized. A total formula amount of 17.95% of pure water with qualified conductivity, a total formula amount of 0.21% of gel powder with water retention, and a total formula amount of 0.14% of gel powder with thickening properties are put into a high-position dispersion kettle 12 for high-speed dissolution and dispersion until the mixed material is completely swollen to obtain a gel powder solution. The machine can be stopped and left to mature for more than 12 hours for use. The water-retaining gel powder uses Carbomer934, which is heated at 104°C for 2 hours without affecting its thickening properties. The thickening gel powder uses U20, which also has a certain salt resistance. Due to the addition of two types of gel powder and stirring, the predetermined pH value and viscosity can be better achieved at the same time. The pH regulator is diluted with an appropriate amount of pure water, and the pH regulator solution of the formula amount is obtained after filtration, and the total formula amount is 11.7% PH regulator solution is transferred to a high-level metering cylinder for standby use, and then 70% of the total formula amount of filtered and impurity-free food-grade alcohol is added to the main dispersing stirring kettle 13, and an appropriate amount of gel powder solution is extracted from the high-level dispersing kettle, filtered, and added to the main dispersing stirring kettle 13. The main dispersing stirring kettle 13 is stirred at a speed of 100-200 rpm until the material is stirred evenly to obtain a secondary mixed material, and the speed of the main dispersing stirring kettle 13 is adjusted. The initial viscosity of the secondary mixed material is read by the online viscometer 14. According to the viscosity test result, the PH regulator solution is slowly added to the main dispersing stirring kettle 13 by using a high-level metering cylinder until the viscosity of the mixed material reaches a preset range, and the stirring is stopped to obtain a gel solution. The PH value of the gel solution is detected by sampling. When the PH value is within the set neutral range, it is a qualified product. The qualified product is filtered and packaged through a second filter 44 and an automatic packaging machine.

[0055] The method for producing hand-free gel of the present invention comprises the following steps:

[0056] Step S5 also includes the following steps: when the viscosity of the online viscometer 14 is displayed in the range of 6500-7000cps / 25°C, stop slowly dripping the pH regulator solution into the main dispersing stirring tank 13; the alcohol is an edible alcohol solution with a purity of 75%. The gel product of the above-mentioned specified viscosity acts on the hands for about 1 minute and is suitable for use. 75±5% alcohol has a good antibacterial effect and a fast evaporation rate.

[0057] The method for producing hand-free gel of the present invention, wherein step S6 also includes the following contents:

[0058] The pH value of the gel liquid is tested by sampling. When the pH value is not within the set neutral range, it is a defective product. The defective products are subjected to steps S5 and S6 in sequence until they are re-tested as qualified products and then filtered and packaged. This design can better control the product quality, thereby improving the product quality.

[0059] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A production equipment for hand-free gel, characterized in that: It includes a pure water unit, a high-level dispersion kettle, a main dispersion stirring kettle, an online viscometer, a condenser, a high-level metering cylinder, an alcohol recovery tank, a circulating water inlet pipe, a circulating water return pipe, a first pipe body, a second pipe body and a third pipe body; The end of the circulating water inlet pipe is connected to the pure water unit, the output end of the pure water unit is connected to the high-position dispersion kettle through the first tube body, the discharge port of the high-position dispersion kettle is connected to the main dispersion stirring kettle through the second tube body, and the end of the second tube body is provided with a first filter, the condenser is connected to the main dispersion stirring kettle, the condenser is provided with a condensation branch pipe, the condensation branch pipe is connected to the circulating water inlet pipe, the condensation branch pipe is provided with a control valve, the condenser is provided with a drain pipe, the drain pipe is connected to the circulating water return pipe, the high-position metering cylinder is connected to the main dispersion stirring kettle through the third tube body, the online viscometer is arranged on either side of the main dispersion stirring kettle, the online viscometer is provided with a test tube, the end of the test tube is provided with a driving pump, and the online viscometer is connected to the main dispersion stirring kettle through the test tube; A constant temperature water cylinder is arranged on any side of the main dispersing stirring kettle, at least one constant temperature branch pipe is arranged near the head end of the circulating water inlet pipe, the constant temperature branch pipe is connected to the constant temperature water cylinder, the constant temperature water cylinder is arranged with a fourth pipe body, at least one circulating pump is arranged at the head end of the fourth pipe body, and the constant temperature water cylinder is connected to the jacket of the main dispersing stirring kettle through the fourth pipe body; The jacket of the main dispersing stirring kettle is provided with a reflux pipe, and the main dispersing stirring kettle is connected to the constant temperature water cylinder through the reflux pipe; An alcohol recovery tank is provided on either side of the condenser, the alcohol recovery tank is connected to the condenser, an introduction pipe is provided on one side of the alcohol recovery tank, and the alcohol recovery tank is connected to the main dispersion stirring tank through the introduction pipe; The high-position metering cylinder is used to store and slowly drip the pH adjusting agent solution into the main dispersing stirring tank; when the viscosity of the online viscometer is displayed in the range of 6500-7000cps / 25°C, the high-position metering cylinder stops slowly dripping the pH adjusting agent solution into the main dispersing stirring tank.

2. The production equipment of hand-free gel according to claim 1, characterized in that: The discharge port of the main dispersing stirring kettle is provided with a discharge pipe, and the end of the discharge pipe is provided with a second filter.

3. The production equipment of hand-free gel according to claim 2, characterized in that: An automatic packaging machine is arranged on any side of the main dispersing stirring kettle, and a feeding end of the automatic packaging machine is connected to the main dispersing stirring kettle through the discharging pipe.

4. The production equipment of hand-free gel according to claim 1, characterized in that: A booster pump is arranged near the end of the circulating water inlet pipe.

5. A method for producing a hand-free gel, characterized in that: The production equipment for the hand-free gel according to any one of claims 1 to 4 comprises the following production steps: Preparation stage of gel powder dissolving solution: S1: Deliver an appropriate amount of pure water with a conductivity of less than 5.1 to the high-position dispersion kettle; S2: adding the water-retaining gel powder and the thickening gel powder into pure water in sequence, dissolving and dispersing at high speed until the mixed material is completely swollen to obtain a gel powder solution, and then stopping the machine to stand and mature for more than 12 hours for standby use; pH adjuster solution preparation stage: S3: diluting the pH regulator with an appropriate amount of pure water, filtering to obtain a pH regulator solution, and transferring the pH regulator solution into a high-position metering cylinder for standby use; Mixing preparation stage: S4: adding an appropriate amount of filtered and impurity-free food-grade alcohol into the main dispersing stirring kettle, extracting an appropriate amount of the gel powder solution from the high-position dispersing kettle, filtering, and adding to the main dispersing stirring kettle, and stirring the main dispersing stirring kettle at a speed of 100-200 rpm until the materials are uniformly stirred to obtain a secondary mixed material; S5: adjusting the rotation speed of the main dispersing stirring kettle, reading the initial viscosity of the secondary mixed material by the online viscometer, and slowly adding the pH adjusting agent solution to the main dispersing stirring kettle by the high-level metering cylinder according to the viscosity test result; when the viscosity of the online viscometer is displayed in the range of 6500-7000cps / 25°C, stopping slowly adding the pH adjusting agent solution to the main dispersing stirring kettle and stopping stirring to obtain a gel solution; S6: testing the pH value of the gel solution by sampling, and when the pH value is within the set neutral range, the gel solution is qualified, and the qualified product is filtered and packaged through a second filter and an automatic packaging machine; The gel powder dissolving solution preparation stage and the pH adjusting agent solution preparation stage are performed in no particular order.

6. The method for producing the hand-free gel according to claim 5, characterized in that: The step S6 also includes the following contents: The pH value of the gel solution is detected by sampling. When the pH value is not within the set neutral range, it is a defective product. The defective product is subjected to the steps S5 and S6 in sequence until it is re-tested as a qualified product and then filtered and packaged.

Images