Paper diaper permeability tester

Abstract

The utility model relates to the technical field of testing devices, and discloses a paper diaper permeability tester which comprises a tester body, a first lifting device and a second lifting device which are arranged on the same horizontal line are arranged at the top of the inner side of the tester body, and a translation device is arranged at the corresponding position of the bottom of the tester body; a liquid adding module is arranged on the first lifting device, a pressurizing module is arranged on the second lifting device, and a sample holder is arranged on the moving device; the liquid adding module is connected with a liquid adding device, the liquid adding device comprises a water pipe, and the liquid adding device is connected with the liquid adding module through the water pipe. The tester is simple in structure, suitable for batch production in factories, high in automation degree, accurate in testing and capable of automatically processing data and effectively saving labor cost.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a diaper permeability tester. Background Art

[0002] Diapers are common in daily life. When it comes to the production of diapers, some testing equipment is needed to test the quality of diapers. The diaper permeability tester is used to measure the permeability properties of diapers and diapers, such as absorption rate, re-seepage and leakage. Diaper permeability includes absorption rate, re-seepage and leakage. The absorption rate refers to the time required for the sample to absorb a certain amount of test solution; the re-seepage refers to the mass of the test solution that returns to the surface layer under a certain pressure after the sample absorbs a certain amount of test solution; the leakage refers to the mass of the test solution that passes through the leak-proof bottom film under a certain pressure after the sample absorbs a certain amount of test solution.

[0003] The traditional measurement method involves artificially injecting water and then measuring the permeability properties of diapers, such as absorption rate, rewet volume and leakage volume. The measurement process is cumbersome, consumes a lot of labor costs, and can also lead to inaccurate absorption rate test results. Summary of the invention

[0004] The utility model aims at the deficiencies of the prior art and provides a diaper permeability tester.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A diaper permeability tester, the tester comprising an instrument body, a first lifting device and a second lifting device on the same horizontal line are arranged at the top of the inner side of the instrument body, and a translation device is arranged at a corresponding position at the bottom;

[0007] The first lifting device is provided with a liquid adding module, the second lifting device is provided with a pressurizing module, and the moving device is provided with a sample rack;

[0008] The liquid adding module is connected with a liquid adding device, and the liquid adding device comprises a water pipe, and the liquid adding device is connected with the liquid adding module through the water pipe.

[0009] Preferably, the translation device includes a first motor, a ball screw, a guide rail and a translation connector, the first motor is connected to the ball screw through a belt; the guide rails are arranged on both sides of the ball screw, and the ball screw and the guide rails are connected through the translation connector.

[0010] Preferably, a nut is provided on the ball screw, and a slider is provided on the guide rail; the nut and the slider are fixedly arranged at the bottom of the translation connector.

[0011] Preferably, the sample rack is arranged above the translation connection member, and a support plate is arranged between the sample rack and the translation connection member.

[0012] Preferably, the first lifting device and the second lifting device are electric push rods.

[0013] Preferably, the electric push rod includes a second motor and a driving screw.

[0014] Preferably, the liquid adding device further comprises a constant temperature water bath and a peristaltic pump. The constant temperature water bath is arranged behind the sample rack and connected to the liquid adding module through a water pipe. The peristaltic pump is arranged on the water pipe.

[0015] Preferably, the sample rack comprises a sample support and a U-shaped sample base, and the sample support is arranged inside the U-shaped sample base.

[0016] Preferably, a stainless steel weight block is provided in the pressurizing module.

[0017] Preferably, the measuring instrument also includes a USB interface, an RS232 serial port and a WIFI network module.

[0018] Since the utility model adopts the above-mentioned technical scheme, the principle of the test is as follows: the sample is put on the sample holder and placed in a U-shaped sample base lined with absorbent paper. The standard liquid adding module is placed in the absorption area on the surface of the sample. The sample is under a certain pressure, and the liquid adding device injects a certain volume of physiological saline into the standard liquid adding module. The automatic timing device records the time from the start of liquid addition to the complete absorption of physiological saline by the sample. Each sample is added with liquid twice, and the absorption speed of the sample is represented by the two absorption times. After the second liquid addition is completed, the standard liquid adding module is taken out, and after a certain number of layers of absorbent paper are placed on the sample, the standard pressurizing module is placed, and the pressurization is performed for a specified time under a certain pressure. The mass increase of the absorbent paper on the sample represents the back-infiltration amount of the sample, and the mass increase of the absorbent paper at the bottom of the sample represents the leakage amount of the sample. The diaper permeability tester provided by the utility model has a simple structure, is suitable for factory batch production, has a high degree of automation, accurate testing, automatic data processing, and effectively saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the external structure of the diaper permeability tester.

[0020] Figure 2 This is a schematic diagram of the internal structure of a diaper permeability tester.

[0021] Figure 3 Schematic diagram of the connection structure between the translation device and the sample holder.

[0022] Figure 4It is a structural schematic diagram of the translation device. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0024] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] like Figure 1-4 The diaper permeability tester shown in the figure comprises an instrument body 1, a first lifting device 21 and a second lifting device 22 on the same horizontal line are arranged on the top of the inner side of the instrument body 1, and a translation device 3 is arranged at the corresponding position of the bottom. A liquid adding module 4 is arranged on the first lifting device 21, a pressurizing module 5 is arranged on the second lifting device 22, and a sample rack 6 is arranged on the moving device.

[0026] The translation device 3 includes a first motor 31, a ball screw 32, a guide rail 33 and a translation connector 34. The first motor 31 is connected to the ball screw 32 through a belt, the guide rail 33 is arranged on both sides of the ball screw 32, a nut 35 is arranged on the ball screw 32, a slider 36 is arranged on the guide rail 33, and the nut 35 and the slider 36 are fixedly arranged at the bottom of the translation connector 34.

[0027] The sample rack 6 is arranged above the translation connection member 34, and a support plate 37 is arranged between the sample rack 6 and the translation connection member 34. The sample rack 6 includes a sample support 61 and a U-shaped sample base 62, and the sample support 61 is arranged inside the U-shaped sample base 62.

[0028] The first lifting device 21 and the second lifting device 22 are electric push rods, and the electric push rods include a second motor 23 and a driving screw 24 .

[0029] The liquid adding module 4 is connected to a liquid adding device, which includes a water pipe 73 , a constant temperature water bath 71 and a peristaltic pump 72 . The constant temperature water bath 71 is arranged behind the sample rack 6 and connected to the liquid adding module 4 through the water pipe 73 . The peristaltic pump 72 is arranged on the water pipe 73 .

[0030] A stainless steel weight block is arranged inside the pressurizing module 5 .

[0031] This utility model instrument has a variety of connection forms, and can be connected to the computer through USB, RS232 serial port, WIFI network, and transmit the test data to the designated local or cloud server. After networking, the test results can be saved to the cloud server, and through the dedicated PN-QMS series quality management system, data query, management, reporting, big data analysis statistics and visual large-screen display can be performed.

[0032] The operating steps of the above-mentioned measuring instrument are as follows: 1. Preparation before measurement

[0033] 1. Prepare normal saline solution

[0034] Weigh 9.00 g of sodium chloride into a measuring cup, add water to 1000 mL mark and shake well.

[0035] 2. Turn on the computer

[0036] Pour an appropriate amount of physiological saline into the liquid storage device, turn on the machine, and it will automatically heat up when the liquid is detected, and stop heating when the temperature reaches the set temperature.

[0037] 2. Choose sample type and sample size

[0038] Automatically switches the standard liquid addition flow rate and liquid removal volume according to the selected sample type and sample size.

[0039] Sample types: diapers and diapers.

[0040] Sample sizes: Children-Small, Children-Medium, Children-Large, Adult-Moderate and Adult-Severe.

[0041] 3. Select test accessories

[0042] According to the specifications of the tested sample, select the corresponding model of U-shaped sample base, sample holder, standard liquid adding module, and standard pressurizing module.

[0043] 4. Weigh the quality of absorbent paper before measurement

[0044] Enter the weighing center, place absorbent paper on the balance, and when the value stabilizes, click Write directly at the corresponding position.

[0045] 5. Rinse

[0046] Automatically rinse twice.

[0047] Note: Place the measuring cup at the bottom of the liquid outlet during rinsing; if no liquid flows out, press the "Rinse" button again to exhaust the air in the tube.

[0048] 6. Install the sample

[0049] Take a sample (elastic bands should be cut for adult diapers) and put it on the sample holder. The leakproof edge of the sample should be outside the sample holder. The surface of the sample should be as flat as possible and there should be no obvious dead folds. Place the U-shaped sample base (or the curved sample base for adult diapers) on a horizontal table and put several layers of absorbent paper of known mass in the U-shaped test area. When placing, the center of the absorbent paper should coincide with the center of the U-shaped sample base. Gently place the sample holder with the sample in the U-shaped test area of ​​the U-shaped sample base with absorbent paper. When placing, the front end of the sample should be on the left (L) side of the U-shaped sample base and the rear end should be on the right (R) side of the U-shaped sample base. Then place the U-shaped sample base with the sample in the fixed position of the instrument.

[0050] 7. Testing

[0051] (1) First absorption test

[0052] Enter the test center and click the button to start the test. The standard liquid adding module first presses the sample, then injects physiological saline, and starts the timing at the same time. The absorption time is recorded until the liquid level disappears at the lowest point of the absorption area. After pressurizing for 1 minute, the standard liquid adding module is reset to complete the first absorption test.

[0053] (2) Second absorption test

[0054] After the first absorption test, wipe the bottom of the standard liquid adding module with a clean paper towel. Repeat (1) 8 minutes after the start of liquid addition to conduct the second absorption test. The absorption time of this time is the second absorption speed of the sample.

[0055] (3) Determination of back-infiltration volume

[0056] Counting from the first addition of liquid, 15 minutes later, quickly place 10 layers of absorbent paper (15 layers for adult diapers) of known mass on the surface of the sample. At 16 minutes, the standard pressurizing module automatically moves to press on the absorbent paper and applies a pressure of (4.0±0.2) kPa. After 1 minute of pressurization, the standard pressurizing module automatically resets.

[0057] Take out the absorbent paper and weigh the mass of the absorbent paper with a balance. Operation method: Place the absorbent paper on the balance, wait for the value to stabilize, and then directly click on the corresponding position on the instrument screen to write. The re-seepage amount is automatically calculated, expressed as the mass difference before and after the absorbent paper test on the sample surface.

[0058] (4) Determination of leakage

[0059] After the back-seepage is measured, remove the sample and quickly weigh the mass of the absorbent paper placed at the bottom of the sample. Operation method: Place the absorbent paper on the balance, and after the value stabilizes, directly click on the corresponding position on the instrument screen to write. The leakage amount is automatically calculated and expressed as the mass difference of the absorbent paper at the bottom of the sample before and after the test.

[0060] After the test is completed, wipe the bottom of the standard liquid adding module and the standard pressure module with clean paper towels, remove the U-shaped sample seat, take out the tested sample, and prepare for the next test. For data with abnormal test results, remove them after eliminating the reasons for the sample. At least 5 valid data are measured for each sample.

[0061] 8. Cleaning

[0062] After completing all tests, replace the liquid storage tank with distilled water or deionized water, press the rinse button several times to automatically clean the dosing device and the standard dosing module.

[0063] IX. Data query, statistics and printing

[0064] Each screen displays 5 groups of test data. Data printing is divided into single printing and statistical printing. Select one of the data for single printing; do not select or press the key first and then the key for statistical printing.

[0065] The above is a description of the embodiments of the utility model. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed in this article.

Claims

1. A diaper permeability tester, characterized in that: The measuring instrument comprises an instrument body (1), wherein a first lifting device (21) and a second lifting device (22) are arranged on the same horizontal line at the top of the inner side of the instrument body (1), and a translation device (3) is arranged at a corresponding position at the bottom; The first lifting device (21) is provided with a liquid adding module (4), the second lifting device (22) is provided with a pressurizing module (5), and the moving device is provided with a sample rack (6); The liquid adding module (4) is connected to a liquid adding device, the liquid adding device comprises a water pipe (73), and the liquid adding device is connected to the liquid adding module (4) via the water pipe (73).

2. The measuring instrument according to claim 1, characterized in that: The translation device (3) comprises a first motor (31), a ball screw (32), a guide rail (33) and a translation connection member (34); the first motor (31) is connected to the ball screw (32) via a belt; the guide rail (33) is arranged on both sides of the ball screw (32); the ball screw (32) and the guide rail (33) are connected via the translation connection member (34).

3. The measuring instrument according to claim 2, characterized in that: The ball screw (32) is provided with a nut (35), and the guide rail (33) is provided with a slider (36); the nut (35) and the slider (36) are fixedly arranged at the bottom of the translation connecting member (34).

4. The measuring instrument according to claim 2, characterized in that: The sample rack (6) is arranged above the translation connection member (34), and a support plate (37) is arranged between the sample rack (6) and the translation connection member (34).

5. The measuring instrument according to claim 1, characterized in that: The first lifting device (21) and the second lifting device (22) are electric push rods.

6. The measuring instrument according to claim 5, characterized in that: The electric push rod comprises a second motor (23) and a driving screw (24).

7. The measuring instrument according to claim 1, characterized in that: The liquid adding device further comprises a constant temperature water bath (71) and a peristaltic pump (72); the constant temperature water bath (71) is arranged behind the sample rack (6) and connected to the liquid adding module (4) via a water pipe (73); and the peristaltic pump (72) is arranged on the water pipe (73).

8. The measuring instrument according to claim 1, characterized in that: The sample rack (6) comprises a sample support (61) and a U-shaped sample base (62), wherein the sample support (61) is arranged inside the U-shaped sample base (62).

9. The measuring instrument according to claim 1, characterized in that: A stainless steel weight block is arranged in the pressurizing module (5).

10. The measuring instrument according to claim 1, characterized in that: The measuring instrument also includes a USB interface, an RS232 serial port and a WIFI network module.

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