A device and method for testing the absorbency of diapers

Abstract

This invention discloses a device and method for testing the absorbency of diapers, belonging to the field of diaper production. The device includes a frame; a top plate fixedly connected to the upper left side of the frame, with a funnel movably connected to the center of the top plate; a recycling box fixedly connected to the upper right side of the frame, with a rotating shaft fixedly connected between the recycling box and the left side of the frame, and a fixed plate fixedly connected to the upper end of the rotating shaft; a guide channel fixedly connected to the front and rear ends of the fixed plate, with the right side of the guide channel open; and a motor fixedly connected to the upper center of the frame, with a drive disc fixedly connected to the motor's output shaft, and a driven disc fixedly connected to the lower center of the fixed plate, with the driven disc in contact with the circumferential side of the drive disc. This allows for comprehensive testing of the diaper's side leakage, seepage, and water-locking properties, improving the accuracy of the absorbency test data.

Description

Technical Field

[0001] This invention relates to the field of diaper manufacturing, and more specifically, to a device and method for testing the absorbency of diapers. Background Technology

[0002] Disposable diapers are a common daily necessity for babies. Dry diapers can keep babies sleeping soundly all night long. Therefore, the absorbency of disposable diapers largely determines their quality.

[0003] During diaper production, diaper samples need to be taken for absorbency testing. A common diaper absorbency test involves laying the diaper flat on a table, pouring a solution containing a color developer on it, and then wiping the diaper with toilet paper to observe whether the toilet paper becomes damp in order to determine the absorbency of the diaper.

[0004] The above testing methods are static tests. However, when a baby wears a diaper, the baby will be in a state of motion. Therefore, the static test values ​​can only be used as a reference and cannot be used as accurate data on the absorbency of the baby's diaper.

[0005] A published patent (publication number: CN111982895A) discloses a device for testing the absorbency of diapers. By setting an adjustable tilt angle hydraulic telescopic rod above the base, and cooperating with the clamping components on the testing table, the diaper can be tilted or laid flat to test the absorbency of the diaper under different conditions. It is simple to operate, highly practical, and easy for users to use.

[0006] Although the aforementioned comparative documents tested the absorbency of diapers under different conditions by tilting or laying them flat, babies' movements are not limited to lying down and standing up; babies also roll over from time to time, so the leak-proof performance of diapers also needs to be tested. Summary of the Invention

[0007] 1. Technical problems to be solved

[0008] In view of the problems existing in the prior art, the purpose of this invention is to provide a device and method for testing the absorbency of diapers, which can realize comprehensive testing of side leakage, seepage and water retention of diapers, and improve the accuracy of absorbency test data.

[0009] 2. Technical Solution

[0010] To solve the above problems, the present invention adopts the following technical solution.

[0011] A device for testing the absorbency of diapers, comprising a frame;

[0012] The top plate is fixedly connected to the upper left side of the frame, and a funnel is movably connected to the middle of the top plate;

[0013] A recycling mechanism for recovering the solution that overflows during water absorption testing, including a recycling box fixedly connected to the upper right side of the frame;

[0014] A flow guiding mechanism is used to receive the overflowing solution during the side leakage detection and to guide the received solution into the recovery mechanism, including flow guiding grooves fixedly connected to the front and rear ends of the fixed plate;

[0015] The drive mechanism, used to drive the diaper to swing back and forth during the absorbency test, in order to facilitate the side leakage test of the diaper, includes a motor fixedly connected to the middle of the upper part of the frame.

[0016] Furthermore, a rotating shaft is fixedly connected between the recycling box and the left side of the frame, a fixing plate is fixedly connected to the upper end of the rotating shaft, the right side of the guide channel is open, a drive disk is fixedly connected to the output shaft of the motor, a driven disk is fixedly connected to the lower middle part of the fixing plate, and the driven disk and the circumferential side of the drive disk are in contact.

[0017] Furthermore, a pressing mechanism is provided on the right side of the top plate. The pressing mechanism includes a connecting arm rotatably connected to the middle of the right side of the top plate, and a pressure cylinder is fixedly connected to the lower end of the connecting arm. The bottom wall of the pressure cylinder is made of magnetic metal, and the fixing plate is a magnetic plate. The magnetic attraction force of the fixing plate on the pressure cylinder is 40N.

[0018] Furthermore, the top plate has grooves on the middle right side and the left side of the connecting arm, and connecting balls are rotatably connected between the two grooves.

[0019] Furthermore, a raised edge extends downward from the bottom edge of the pressure cylinder, and an end cap is movably fitted onto the outside of the raised edge. The bottom of the end cap has a mesh opening, and a paper towel is placed inside the end cap.

[0020] Furthermore, the frictional force between the connecting ball and the groove is greater than the sum of the weights of the connecting arm and the pressure cylinder, and the pressure cylinder is made of transparent plastic.

[0021] Furthermore, the set flow rate of the funnel is 10 ml / s, and the sum of the widths of the fixing plate and the guide channel is equal to the width of the recycling box.

[0022] Furthermore, the frictional force between the driving disc and the driven disc is greater than the frictional resistance encountered when the rotating shaft drives the fixed plate to rotate, and the rotating shaft tilts forward and backward by no more than 30 degrees.

[0023] Furthermore, the angle between the fixing plate and the upper surface of the frame is 30 degrees, and clamps are fixedly connected to the upper corners of the fixing plate.

[0024] A method for testing the absorbency of diapers includes the following steps:

[0025] S: Fixing: Lay the diaper flat on the fixing board and fix the corners of the diaper with clamps;

[0026] S: Solution preparation and pouring: Prepare a 0.9% sodium chloride solution to simulate baby's urine, add a color developer to the solution, and then pour the prepared solution into a funnel and pour the solution onto the surface of the diaper through the funnel;

[0027] S: Oscillation, the drive disk is rotated by the motor, so that the drive disk and the driven disk swing back and forth, thereby conducting a side leakage test;

[0028] S: Squeeze, using a pressure cylinder to squeeze the diaper to test its absorbency and water retention performance;

[0029] S: Observations and conclusions: The absorbency and leak-proof properties of diapers are judged by observing whether the solution slides from the surface of the diaper into the recycling box and the diversion channel. At the same time, the diffusion rate and diffusion area of ​​the solution after being absorbed by the diaper are observed using a color developer, and whether the tissues in the pump are wetted by the solution are observed. Finally, the absorbency and water-locking performance of the diaper are determined.

[0030] 3. Beneficial Effects

[0031] Compared with the prior art, the advantages of this invention are:

[0032] (1) The funnel is set to a flow rate of 10 ml / s, which is more in line with the urine rate of infants and increases the accuracy of the test. At the same time, the angle between the fixed plate and the upper surface of the frame is 30 degrees, which can detect the slippage of the diaper. Meanwhile, the motor starts and drives the drive plate to rotate, and the drive plate drives the driven plate to reciprocate, causing the fixed plate to swing left and right and tilt, which can measure the side leakage prevention of the diaper. Compared with static testing, it can better fit the habits of infants and make the test results more accurate.

[0033] (2) This scheme uses a squeezing mechanism to press down on the diaper to simulate the baby's buttocks pressing the diaper, in order to test the absorbency of the diaper when it is squeezed. The magnetic attraction of the fixed plate to the pressure cylinder is 40N, which is based on the baby's weight after three months, which is more in line with dynamic testing and further improves the accuracy of the test.

[0034] (3) In this scheme, when the diaper is pressed by the pressure cylinder, the paper towel is placed inside the end cap and the end cap is fixed on the pressure cylinder by the protruding edge. The paper towel can absorb the solution that seeps out of the diaper when it is pressed, so as to detect whether there is backflow after the diaper is pressed. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2This is a rear view of the present invention;

[0037] Figure 3 For the present invention Figure 2 Enlarged view of A in the middle;

[0038] Figure 4 This is a schematic diagram of the explosion structure of the pressure cylinder of the present invention;

[0039] Figure 5 This is a schematic diagram of the exploded structure of the top plate and connecting arm of the present invention;

[0040] Figure 6 This is a flowchart of the detection process of the present invention.

[0041] Explanation of the labels in the diagram:

[0042] 1. Frame; 2. Top plate; 3. Funnel; 4. Recycling box; 5. Shaft; 6. Fixing plate; 7. Clamp; 8. Guide channel; 9. Motor; 10. Drive plate; 11. Driven plate; 12. Extrusion mechanism; 121. Pressure cylinder; 122. Connecting arm; 123. Protruding edge; 124. End cap; 125. Mesh; 126. Paper towel; 127. Insert groove; 128. Connecting ball. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Example 1:

[0047] Please see Figures 1-3 A device for testing the absorbency of diapers, comprising a frame 1;

[0048] Top plate 2, which is fixedly connected to the upper left side of the frame 1, and a funnel 3 is movably connected to the middle of the top plate 2;

[0049] The recycling box 4 is fixedly connected to the upper right side of the frame 1, and a rotating shaft 5 is fixedly connected between the recycling box 4 and the left side of the frame 1. A fixing plate 6 is fixedly connected to the upper end of the rotating shaft 5.

[0050] The guide channel 8 is fixedly connected to the front and rear ends of the fixed plate 6, and the right side of the guide channel 8 is open.

[0051] Motor 9 is fixedly connected to the upper middle part of the frame 1. The output shaft of motor 9 is fixedly connected to drive disk 10. Driven disk 11 is fixedly connected to the lower middle part of fixed plate 6, and driven disk 11 is in contact with the circumferential side of drive disk 10.

[0052] The set flow rate of the funnel 3 is 10 ml / s; the frictional force between the driving disk 10 and the driven disk 11 is greater than the frictional resistance experienced when the rotating shaft 5 drives the fixed plate 6 to rotate; the rotating shaft 5 tilts forward and backward by no more than 30 degrees when rotating; the sum of the widths of the fixed plate 6 and the guide channel 8 is equal to the width of the recycling box 4; the included angle between the fixed plate 6 and the upper end face of the frame 1 is 30 degrees, and clamps 7 are fixedly connected to the upper corners of the fixed plate 6.

[0053] Specifically, the diaper is first laid flat on the fixing plate 6, and then fixed by the clamp 7. Next, the test solution is poured into the funnel 3 and poured onto the diaper through the funnel 3. It should be noted that the flow rate of the funnel 3 is set to 10ML / S, which is more in line with the urination rate of an infant and increases the accuracy of the test. At the same time, the angle between the fixing plate 6 and the upper surface of the frame 1 is 30 degrees, which can detect the slippage of the diaper. Simultaneously, the motor 9 starts and drives the drive plate 10 to rotate. The drive plate 10 drives the driven plate 11 to reciprocate, causing the fixing plate 6 to swing and tilt from side to side, which can measure the side leakage prevention of the diaper. Compared with static testing, it can better fit the habits of infants and make the test results more accurate. If the absorption is not timely during the test, the solution will flow directly into the recycling box 4 or flow into the recycling box 4 through the guide channel 8, avoiding contamination of the equipment by the test solution.

[0054] Please see, Figure 1 and Figure 5 The top plate 2 is provided with a pressing mechanism 12 on the right side. The pressing mechanism 12 includes a connecting arm 122 rotatably connected to the middle of the right side of the top plate 2, and a pressure cylinder 121 is fixedly connected to the lower end of the connecting arm 122. The bottom wall of the pressure cylinder 121 is made of magnetic metal, and the fixing plate 6 is a magnetic plate. The magnetic attraction force of the fixing plate 6 on the pressure cylinder 121 is 40N.

[0055] The top plate 2 has a groove 127 on the middle right side and the connecting arm 122 on the left side. A connecting ball 128 is rotatably connected between the two grooves 127. The friction between the connecting ball 128 and the groove 127 is greater than the sum of the weights of the connecting arm 122 and the pressure cylinder 121.

[0056] Specifically, during testing, the squeezing mechanism 12 is used to press down on the diaper to simulate the pressure of a baby's buttocks on the diaper, testing the diaper's absorbency when compressed. First, force is applied to the connecting arm 122, causing it to rotate within the groove 127 using the connecting ball 128 to adjust its position. This ensures that the squeezing mechanism 12 does not obstruct the diaper during installation. Because the friction between the connecting ball 128 and the groove 127 is greater than the sum of the weights of the connecting arm 122 and the pressure cylinder 121, the connecting arm 122 remains fixed in its new position after being moved, without displacement due to its own weight. This continues until the diaper is securely installed, at which point the connecting arm 122 is rotated to press the pressure cylinder 121 onto the diaper. After the solution is poured onto the diaper and absorbed, the pressure cylinder 121 is lifted by the connecting arm 122. The absorption at the pressing point of the pressure cylinder 121 is observed. Under the action of the connecting ball bearing 128, the pressure cylinder 121 swings synchronously with the fixing plate 6 as it swings back and forth, ensuring that the pressure cylinder 121 is always pressed tightly against the diaper, further improving the accuracy of the test. The bottom wall of the pressure cylinder 121 is made of magnetic metal and the fixing plate 6 is made of magnetic plate to reduce the weight of the pressure cylinder 121 and facilitate its movement and adjustment. It should be noted that the magnetic attraction force of the fixing plate 6 on the pressure cylinder 121 is 40N, which is based on the weight of the infant after three months, and is more consistent with dynamic testing, further improving the accuracy of the test.

[0057] Please see Figure 4 The bottom edge of the pressure cylinder 121 extends downward with a protruding edge 123, and an end cap 124 is movably sleeved on the outside of the protruding edge 123. The bottom of the end cap 124 has a mesh 125, and a tissue 126 is placed inside the end cap 124. The pressure cylinder 121 is made of transparent plastic.

[0058] Specifically, when the pressure cylinder 121 is used to press the diaper, a tissue is placed inside the end cap 124, and the end cap 124 is fixed to the pressure cylinder 121 by the protruding edge 123. The tissue can absorb the solution that seeps out of the diaper when it is pressed, thereby detecting whether there is backflow after the diaper is pressed. The pressure cylinder 121 is made of transparent plastic material, which can better observe the backflow situation and further improve the accuracy of diaper absorbency testing.

[0059] Please see Figure 6 A method for testing the absorbency of diapers, comprising the following steps:

[0060] S1: Fixing: Lay the diaper flat on the fixing plate 6 and fix the corners of the diaper with the clamps 7;

[0061] S2: Solution preparation and pouring. Prepare a 0.9% sodium chloride solution to simulate baby's urine, add a color developer to the solution, and then pour the prepared solution into funnel 3. The solution is then poured onto the surface of the diaper through funnel 3.

[0062] S3: Swinging, the drive disk 10 is rotated by the motor 9, so that the drive disk 10 swings back and forth in coordination with the driven disk 11, thereby conducting a side leakage test;

[0063] S4: Squeezing, using the pressure cylinder 121 to squeeze the diaper, used to test the diaper's absorbency and water-locking performance;

[0064] S5: Observations and conclusions; The absorbency and leak-proof properties of the diaper are judged by observing whether the solution slides from the surface of the diaper into the recycling box 4 and the guide channel 8. At the same time, the diffusion rate and diffusion area of ​​the solution after being absorbed by the diaper are observed using a color developer, and whether the paper towel in the pressure cylinder 121 is wetted by the solution is observed. Finally, the absorbency and water-locking performance of the diaper are obtained.

[0065] Working principle:

[0066] First, lay the diaper flat on the fixing plate 6, and then fix the diaper with the clamp 7. Next, pour the test solution into the funnel 3, and pour the solution onto the diaper through the funnel 3. It should be noted that the flow rate of the funnel 3 is set to 10ML / S, which is more in line with the baby's urination rate and increases the accuracy of the test. At the same time, the angle between the fixing plate 6 and the upper surface of the frame 1 is 30 degrees, which can detect the slippage of the diaper. Meanwhile, the motor 9 starts and drives the drive plate 10 to rotate. The drive plate 10 drives the driven plate 11 to reciprocate, causing the fixing plate 6 to swing and tilt from side to side, which can measure the side leakage prevention of the diaper. Compared with static testing, it can better fit the baby's habits and make the test results more accurate. If the absorption is not timely during the test, the solution will flow directly into the recycling box 4 or flow into the recycling box 4 through the guide channel 8, avoiding contamination of the equipment by the test solution.

[0067] During testing, the squeezing mechanism 12 is used to press down on the diaper to simulate the pressure of a baby's buttocks on the diaper, testing the diaper's absorbency when compressed. First, force is applied to the connecting arm 122, causing it to rotate within the groove 127 using the connecting ball 128 to adjust its position. This ensures that the squeezing mechanism 12 does not obstruct the diaper during installation. Because the friction between the connecting ball 128 and the groove 127 is greater than the combined weight of the connecting arm 122 and the pressure cylinder 121, the connecting arm 122 remains fixed in its new position after being moved, without shifting due to its own weight. Once the diaper is securely installed, the connecting arm 122 is rotated to press the pressure cylinder 121 onto the diaper. The solution... After being absorbed by the diaper, the pressure cylinder 121 is lifted by the connecting arm 122 to observe the absorption at the pressing point of the pressure cylinder 121. Under the action of the connecting ball 128, the pressure cylinder 121 swings synchronously with the fixing plate 6 when the fixing plate 6 swings back and forth, so that the pressure cylinder 121 is always pressed tightly against the diaper, further improving the accuracy of the test. The bottom wall of the pressure cylinder 121 is made of magnetic metal and the fixing plate 6 is made of magnetic plate. The purpose is to reduce the weight of the pressure cylinder 121 and facilitate the movement and adjustment of the pressure cylinder 121. It should be noted that the magnetic attraction force of the fixing plate 6 on the pressure cylinder 121 is 40N, which is based on the weight of the baby after three months, which is more in line with dynamic testing and further improves the accuracy of the test.

[0068] When the pressure cylinder 121 is used to press the diaper, a tissue is placed inside the end cap 124, and the end cap 124 is fixed to the pressure cylinder 121 by the protruding edge 123. The tissue can absorb the solution that seeps out of the diaper when it is pressed, thereby detecting whether there is backflow after the diaper is pressed. The pressure cylinder 121 is made of transparent plastic material, which can better observe the backflow situation and further improve the accuracy of diaper absorbency testing.

[0069] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the absorbency of diapers, characterized in that: Including the frame (1); Top plate (2), the top plate (2) is fixedly connected to the upper left side of the frame (1), and a funnel (3) is movably connected to the middle of the top plate (2). The recycling mechanism is used to recycle the solution that overflows during the water absorption test, including a recycling box (4) fixedly connected to the upper right side of the frame (1). The flow guiding mechanism is used to receive the overflow solution during the side leakage detection and to guide the received solution into the recovery mechanism, including the flow guiding groove (8) fixedly connected to the front and rear ends of the fixed plate (6). The driving mechanism is used to drive the diaper to swing back and forth during the absorbency test, so as to facilitate the side leakage test of the diaper. It includes (9) which is fixedly connected to the motor at the middle of the upper end of the frame (1). The top plate (2) is provided with a pressing mechanism (12) on the right side. The pressing mechanism (12) includes a connecting arm (122) rotatably connected to the middle of the right side of the top plate (2), and a pressure cylinder (121) is fixedly connected to the lower end of the connecting arm (122). The bottom wall of the pressure cylinder (121) is made of magnetic metal, and the fixing plate (6) is a magnetic plate. The magnetic attraction force of the fixing plate (6) on the pressure cylinder (121) is 40N. A rotating shaft (5) is fixedly connected between the recycling box (4) and the left side of the frame (1). A fixing plate (6) is fixedly connected to the upper end of the rotating shaft (5). The right side of the guide channel (8) is open. A drive disk (10) is fixedly connected to the output shaft of the motor (9). A driven disk (11) is fixedly connected to the middle of the lower end of the fixing plate (6). The driven disk (11) and the circumferential side of the drive disk (10) are in contact. The top plate (2) has a groove (127) on the middle right side and the connecting arm (122) on the left side, and a connecting ball (128) is rotatably connected between the two grooves (127). The bottom edge of the pressure cylinder (121) extends downward with a protruding edge (123), and an end cap (124) is movably sleeved on the outside of the protruding edge (123). The bottom of the end cap (124) is provided with a mesh (125), and a paper towel (126) is placed inside the end cap (124). The friction between the connecting ball (128) and the groove (127) is greater than the sum of the weights of the connecting arm (122) and the pressure cylinder (121), and the pressure cylinder (121) is made of transparent plastic.

2. The diaper absorbency testing device according to claim 1, characterized in that: The set flow rate of the funnel (3) is 10ML / S, and the sum of the widths of the fixed plate (6) and the guide channel (8) is equal to the width of the recycling box (4).

3. The diaper absorbency testing device according to claim 1, characterized in that: The frictional force between the driving disk (10) and the driven disk (11) is greater than the frictional resistance experienced when the rotating shaft (5) drives the fixed plate (6) to rotate. The rotating shaft (5) tilts forward and backward by no more than 30 degrees when rotating.

4. The diaper absorbency testing device according to claim 1, characterized in that: The angle between the fixed plate (6) and the upper end face of the frame (1) is 30 degrees, and the upper corner of the fixed plate (6) is fixedly connected with a clamp (7).

5. The testing method for a diaper absorbency testing device according to any one of claims 1-4, characterized in that: Includes the following steps: S1: Fixing, lay the diaper flat on the fixing plate (6) and fix the corners of the diaper with the clamps (7); S2: Solution preparation and pouring: Prepare a 0.9% sodium chloride solution to simulate the baby's urine, add a color developer to the solution, and then pour the prepared solution into the funnel (3). The solution is poured onto the surface of the diaper through the funnel (3). S3: Swinging, the drive disk (10) is rotated by the motor (9), so that the drive disk (10) swings back and forth in coordination with the driven disk (11) to conduct a side leakage test; S4: Squeezing, using the pressure cylinder (121) to squeeze the diaper, used to test the absorbency and water-locking performance of the diaper; S5: Observations and conclusions: The absorbency and leak-proof properties of the diaper are judged by observing whether the solution slides from the surface of the diaper into the recycling box (4) and the guide channel (8). At the same time, the diffusion speed and diffusion area of ​​the solution after being absorbed by the diaper are observed by using a color developer, and whether the paper towel in the pressure cylinder (121) is soaked by the solution. Finally, the absorbency and water-locking performance of the diaper are obtained.

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