Viscosity Detection Device and Method for a Strong Adhesive

Abstract

The present invention provides a viscosity detection device for a new type of strong glue. The detection device includes a test box, a pipetting device, a pressure block, a timer, powder, etc. The present invention also provides a viscosity detection method for a new type of strong glue. The method utilizes the principle that when the viscosity of the strong glue is high, it penetrates slowly into the powder, and when the viscosity is low, it penetrates quickly. By detecting the penetration time of the strong glue in the powder, the viscosity of the strong glue can be quickly determined. Through the viscosity detection device and method for strong glue provided by the present invention, it has the advantages of low cost, fast speed, small required sample amount, high sensitivity, good repeatability, etc., and can conveniently and quickly test the viscosity of the strong glue, thereby ensuring the product quality of the strong glue.

Description

Technical Field

[0001] The present invention relates to the technical field of viscosity testing, and more particularly, to a viscosity detection device and method for a strong adhesive. Background Art

[0002] The strong adhesive is a single-component new type of fully transparent solution adhesive, which cures at room temperature, is easy to operate, and has excellent water resistance, oil resistance, acid and alkali resistance. It is mainly used for the mutual adhesion and self-adhesion of materials such as soft PVC, synthetic leather, PU artificial leather, butyl rubber, vulcanized rubber, and imitation sheepskin. At the same time, it has a very good bonding effect between soft PVC and metals such as iron plates and steel plates.

[0003] The strong adhesive is a liquid adhesive. During production, viscosity is an important indicator to measure its quality. Therefore, it is necessary to detect its viscosity. Here, the viscosity is not the adhesive force of the strong adhesive. However, the existing viscosity detection methods and devices for ordinary adhesives have the following problems when used for the viscosity detection of strong adhesives: 1. Since the viscosity of the strong adhesive is relatively low, generally lower than the measurement range of the existing viscosity detection devices, it is not easy to accurately measure the viscosity of the strong adhesive with the existing viscosity detection devices, and errors are likely to occur; 2. When detecting the viscosity of the strong adhesive, generally, pressure is applied to it, and its viscosity is calculated based on the amount of the strong adhesive and its flow time. To avoid adhesion during the detection of the strong adhesive, it is necessary to stir it. At the same time, to improve the detection accuracy, it is necessary to adjust the flow rate of the discharge port, obtain multiple groups of data for comparison, the test process is relatively cumbersome, the required sample volume is large, and expensive instruments are also required, resulting in high costs.

[0004] In view of the above problems, there is an urgent need to innovate and design a method and device that are more convenient and fast, require less sample volume, and can accurately measure the viscosity of the strong adhesive. Summary of the Invention

[0005] The purpose of the present invention is to provide a viscosity detection device and method for a strong adhesive that are convenient and fast, low-cost, require less sample volume, have high sensitivity, and good repeatability. By using the principle that when the viscosity of the strong adhesive is large, it penetrates slowly into the beech powder, and when the viscosity is small, it penetrates quickly, the viscosity of the strong adhesive is quickly determined by detecting the penetration time of the strong adhesive in the beech powder, which is particularly suitable for the viscosity detection of the strong adhesive and ensures the product quality of the strong adhesive.

[0006] On the one hand, the present invention provides a viscosity detection device for a strong adhesive, including a test box, a pipetting device, a pressure block, a timer, and a powder. The powder is contained in the test box. The pipette is used to pipette the sample to be tested, the weight is used to flatten the surface of the wood powder, and the stopwatch is used to record the time when the strong adhesive penetrates into the wood powder.

[0007] Further, the powder is beech powder.

[0008] Furthermore, the wood powder is beech wood powder. When using beech wood powder for detection, when the strong glue penetrates into the beech wood powder, the color of the beech wood powder in contact with the strong glue becomes significantly darker, and the color difference is very obvious, making it easy to observe. The penetration time is relatively long, which is convenient for timing and accurate measurement. Moreover, beech wood powder has a low cost and is easily obtainable, making it the best choice of wood powder for viscosity detection.

[0009] Furthermore, the test box has a multi-grid structure. With the multi-grid structure, it can be used to measure the viscosity of multiple groups of strong glue, which is very convenient.

[0010] Furthermore, the test box has a 9-grid or 12-grid structure.

[0011] Furthermore, each grid of the test box has a size of 5 - 20 cm in length, 5 - 20 cm in width, and the box height is 4 - 10 cm.

[0012] Furthermore, each grid of the test box has a size of 7.8 cm in length, 8.2 cm in width, and the box height is 4 cm. Using a suitable size for the test box can make the operation more convenient, facilitate the detection of multiple groups of samples, and reduce unnecessary errors (such as the penetration of the strong glue being blocked due to insufficient height of the test box, etc.).

[0013] Furthermore, the pipetting device is a pipette gun.

[0014] Furthermore, the measuring range of the pipette gun is 0.1 - 1 ml. Selecting a suitable measuring range for the pipette gun can ensure accurate sampling and improve the accuracy and sensitivity of detection.

[0015] Furthermore, the pressure block is a weight, and the timer is a stopwatch.

[0016] Furthermore, the weight of the weight is 100 - 500 g, and the bottom diameter is 2 - 5 cm.

[0017] Furthermore, the weight of the weight is 472 g, and the bottom diameter is 49 mm. Using a weight with a certain weight and bottom area to compact the surface of the beech wood powder can make the detection process more accurate and reduce errors.

[0018] Furthermore, the viscosity detection device further includes tweezers, which are used to take out the solidified strong glue for the next round of detection.

[0019] On the other hand, the present invention also provides a method for detecting the viscosity of strong glue, and the method includes the following steps:

[0020] 1) Pour the powder into the test box, and use the bottom of the pressure block to flatten a certain amount of the powder to a certain thickness;

[0021] 2) Use a pipetting device to pipette a drop of super glue into the powder, and press the timer to start timing the moment the super glue is dropped.

[0022] 3) Press the timer again the moment the super glue has completely penetrated the powder, and record the penetration time. The super glue has completely penetrated the powder means that no super glue can be seen on the surface of the powder.

[0023] Further, the powder is beech wood powder, or the pressure block is a weight, or the pipetting device is a pipette, or the timer is a stopwatch.

[0024] Further, the powder is beech wood powder.

[0025] Further, the pressure block is a weight.

[0026] Further, the pipetting device is a pipette.

[0027] Further, the timer is a stopwatch.

[0028] Further, the above steps need to be repeated at least 3 times, and the average value is taken.

[0029] Further, the test box has a multi-grid structure, and the size of each grid is 5 - 20 cm in length, 5 - 20 cm in width, and the height of the box is 4 - 10 cm; every 100 - 500 g of beech wood powder is filled into one grid of the test box and flattened to a thickness of 2 - 10 cm with a weight.

[0030] Further, the size of each grid of the test box is 7.8 cm in length, 8.2 cm in width, and the height of the box is 4 cm; every 100 g of beech wood powder is filled into one grid of the test box and flattened to a thickness of 2.5 cm with a weight.

[0031] The beech wood powder here can also be replaced by other wood powders, and beech wood powder is preferred. Since the viscosity of the super glue is different, the super glue with a large viscosity penetrates the beech wood powder slowly, and the super glue with a small viscosity penetrates the beech wood powder quickly. Therefore, the viscosity of the super glue can be determined by the penetration time of the super glue in the beech wood powder.

[0032] Further, the standard test conditions of the method are a temperature of (23 ± 2) °C and a relative humidity of (50 ± 5)%; the volume of the super glue pipetted in step 2) is 0.15 ml.

[0033] Since the viscosity of the super glue is related to the test environment, the viscosity becomes smaller when the temperature or humidity is high, and the viscosity becomes larger when the temperature or humidity is low. Therefore, the present invention selects to conduct the detection under standard test conditions.

[0034] If the amount of super glue pipetted is too small, it may be too late to time, and if the amount is too large, it may lead to large errors. Selecting an amount of 0.15 ml can be more convenient for quantification. Therefore, the present invention selects to conduct quantitative detection with 0.15 ml.

[0035] Further, before detection, the super glue and the detection device need to be placed under standard test conditions for at least 24 hours.

[0036] Further, after the infiltration time measurement is completed, it is also necessary to convert the infiltration time into the viscosity of the super glue. In the present invention, a group of super glues with known viscosities are used to detect the infiltration time, and a standard curve is drawn to detect the viscosities of other samples.

[0037] On the other hand, the present invention also provides the use of beech wood powder in the preparation of a viscosity detection device for super glue.

[0038] Further, the use of beech wood powder in the preparation of a viscosity detection device for super glue, and the viscosity detection device is the viscosity detection device for super glue as described above.

[0039] The beneficial effects of the present invention are as follows: The present invention provides a viscosity detection device for super glue. The detection device includes a test box, a pipetting device, a pressure block, a timer, and a powder, etc. The present invention also provides a new method for detecting the viscosity of super glue. The method uses the principle that when the viscosity of super glue is high, the infiltration in the powder is slow, and when the viscosity is low, the infiltration is fast. By detecting the infiltration time of super glue in the powder, the viscosity of super glue can be quickly determined. Through the viscosity detection device and method for super glue provided by the present invention, it has the advantages of low cost, fast speed, small amount of required samples, high sensitivity, good repeatability, etc., and can conveniently and quickly test the viscosity of super glue, thereby ensuring the product quality of super glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic structural diagram of the viscosity detection device for super glue provided in Example 1, where the test box is a 9-grid structure DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The present invention will be further described in detail below in conjunction with embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention and do not limit it in any way.

[0042] Viscosity Detection Device for Super Glue in Example 1

[0043] The viscosity detection device for super glue provided in this embodiment is as Figure 1 shown, and includes a test box 1, a pipette 2, a weight 3, a stopwatch 4, a pair of tweezers 5, and beech wood powder 6. The beech wood powder 6 is filled in the test box 1. The pipette 2 is used to pipette the sample to be tested, the weight 3 is used to flatten the surface of the beech wood powder 6, and the stopwatch 4 is used to record the time when the sample infiltrates into the beech wood powder 6.

[0044] Preferably, the test box 1 is a 9-grid structure, and the size of each grid is 7.8 cm in length, 8.2 cm in width, and the height of the box is 4 cm.

[0045] Preferably, the weight of the weight 3 is 472 g and the bottom diameter is 49 mm. Compacting the surface of the beech wood powder 6 with the weight 3 can make the detection process more accurate and reduce errors.

[0046] Example 2 Selection of Powders

[0047] Using the viscosity detection device for the strong glue provided in Example 1, where the beech wood powder is replaced with commercially available poplar wood powder, beech wood powder, sandalwood powder, and bamboo powder respectively, and the strong glue is TEKBOND793 strong glue produced by Hangzhou Huijie New Materials Co., Ltd. The standard test conditions are temperature (23±2)°C and relative humidity (50±5)%. Before detection, the strong glue and the detection device are placed under the standard test conditions for at least 24 h. The detection steps are as follows: Pour 100 g of each of the four powders into the test box, and use the bottom of the weight to flatten the surface of the four powders to a thickness of 2.5 cm; Use a pipette to pipette 0.15 ml of the strong glue and drop it into each of the four powders respectively, and press the stopwatch at the moment of dropping to start timing; Press the stopwatch again when the strong glue completely penetrates into the powder, and record the penetration time. The results are shown in Table 1.

[0048] Table 1 Influence of Different Powders on the Detection Effect of the Viscosity of Strong Glue

[0049]

[0050] As can be seen from Table 1, when using poplar wood powder for detection, the penetration time is 1.8 s, the color difference is obvious and easy to observe, and the cost is slightly high; when using sandalwood powder for detection, the penetration time is 1.6 s, which is relatively fast, prone to errors, the color difference is obvious and easy to observe, but the cost of sandalwood powder is relatively high; when using bamboo powder for detection, the penetration time is 1.9 s, the cost is low, but the color difference is not obvious, prone to bring errors; when using beech wood powder for detection, the penetration time is 2.2 s, the penetration time is the longest, which can improve the detection sensitivity and accuracy, at the same time the color difference is very obvious, easy to time and observe, and the cost is low. In summary, beech wood powder is the best choice for the powder used in the viscosity detection of strong glue.

[0051] Example 3 Selection of the Volume of the Strong Glue Sample

[0052] The viscosity detection device of the strong glue provided in Example 1 is adopted. The wood powder used is commercially available beech wood powder, and the strong glue is TEKBOND 793 strong glue produced by Hangzhou Huijie New Materials Co., Ltd., and its known viscosity is 100 cps. The standard test conditions are temperature (23±2)°C and relative humidity (50±5)%. Before detection, the strong glue and the detection device are placed under the standard test conditions for at least 24 h. The detection steps are as follows: Pour 100 g of beech wood powder into the test box, and use the bottom of the weight to flatten the surface of the beech wood powder to a thickness of 2.5 cm; Use a pipette to separately pipette 0.05, 0.10, 0.15, 0.20, and 0.30 ml of strong glue and drop it into the beech wood powder, and press the stopwatch to start timing at the moment of dropping; Press the stopwatch again at the moment when the strong glue completely penetrates into the beech wood powder, and record the penetration time. Each sample volume is detected 5 times, and the average deviation is calculated by the ratio of the sum of the absolute values of the deviations of each single measurement to the number of measurements. The results are shown in Table 2.

[0053] Table 2 Influence of the sample volume of the strong glue on the viscosity detection effect of the strong glue

[0054] Experimental group Volume of super glue sample Average penetration time (S) Average deviation (%) 1 0.05 1.8 1.04 2 0.1 2.0 0.25 3 0.15 2.2 0.1 4 0.2 2.3 0.1 5 0.3 2.5 0.15

[0055] It can be seen from Table 2 that when the sample volume of the strong glue is 0.05 ml, due to too little sample amount, the penetration time is only 1.8 s, and the penetration is too fast, which may cause the timing to be too late, resulting in an increase in error, and the average deviation of the five viscosity measurement results is 1.04%; when the sample volume of the strong glue is 0.1 ml, the penetration time is 2.0 s, and the average deviation of the five viscosity measurement results is still 0.25%; when the sample volume is 0.15 ml, the penetration time is 2.2 s, the length of the penetration time is more appropriate, the viscosity measurement result is also more accurate, and the repeatability is better; when the sample volume is 0.2 or 0.3 ml, the penetration times reach 2.3 and 2.5 s respectively, and the viscosity measurement results are also more accurate. Considering comprehensively, when the sample volume of 0.15 ml is selected, the length of the penetration time is more appropriate, the sample usage is saved, the repeatability is better, and the accuracy and sensitivity of the viscosity detection results are both higher.

[0056] Preparation of the standard curve in Example 4

[0057] The viscosity detection device of the strong glue provided in Example 1 is adopted. The wood powder used is commercially available beech wood powder. Four models JOINLEADER495, JOINLEADER 401, JOINLEADER 406, and JOINLEADER 416 of TEKBOND 793 strong glue produced by Hangzhou Huijie New Materials Co., Ltd. are used for the experiment. These four models are strong glues with known viscosities. The standard test conditions are temperature (23±2)°C and relative humidity (50±5)%. Before detection, the strong glue and the detection device are placed under the standard test conditions for at least 24 hours. The detection steps are as follows: Pour 100 g of beech wood powder into the test box, and use the bottom of the weight to flatten the surface of the beech wood powder to a thickness of 2.5 cm; Use a pipette to respectively pipette 0.15 ml of each strong glue and drop it into the beech wood powder, and press the stopwatch to start timing at the moment of dropping; Press the stopwatch again at the moment when the strong glue completely penetrates into the beech wood powder, and record the penetration time. The results are shown in Table 3.

[0058] Table 3 Detection Results of Different Strong Glue Samples

[0059] Experimental group Name of super glue Known viscosity (cps) Penetration time (S) 1 JOINLEADER 495 50 1.1 2 JOINLEADER 401 100 2.2 3 JOINLEADER 406 20 0.3 4 JOINLEADER 416 1600 41

[0060] According to the relationship between the known viscosity and the penetration time of the strong glue samples, the standard curve takes the viscosity of the strong glue samples as the abscissa and the corresponding penetration time as the ordinate, and performs linear regression to obtain the standard curve. The standard curve is y = 0.0258x - 0.2595 (R 2 = 0.9999).

[0061] Comparison between Example 5 and the Ordinary Viscosity Detection Method

[0062] This example is tested in two groups. The first group uses the detection device provided in Example 1 and follows the method described in Example 3, where the sample volume is 0.15 ml, to detect the viscosity of TEKBOND 793 strong glue produced by Hangzhou Huijie New Materials Co., Ltd. The second group follows the single-cylinder rotational viscometer method provided by the national standard GB / T 2794-2013. The single-cylinder rotational viscometer is purchased from BROOK FIELD Company to detect the viscosity of TEKBOND 793 strong glue produced by Hangzhou Huijie New Materials Co., Ltd. Each group repeats the detection 3 times, and the average deviation is calculated by the ratio of the sum of the absolute values of the deviations of each single measurement to the number of measurements. The detection results are shown in Table 4.

[0063] Table 4 Comparison of Different Viscosity Detection Methods

[0064]

[0065] As can be seen from Table 4, when using the traditional single-cylinder rotational viscometer method to detect the viscosity of the strong glue, the sample amount required each time is relatively large, which is 250 ml. The time required for each inspection is 1 - 10 minutes. The operation is cumbersome. After measuring each sample, the rotor and the protective frame need to be cleaned before the next sample can be detected. The required time is long and the cost is high. Since the viscosity of the strong glue is very low, for three repeated detections, the average deviation between the detection results is relatively large and the detection results are unstable. When using the viscosity detection device provided by the present invention to detect the viscosity of the strong glue, the sample amount required each time is very small, which is 0.15 ml. The time required for each inspection is 2 - 3 seconds. The operation is convenient and fast. After measuring each sample, only need to use tweezers to take out the solidified strong glue and then conduct the next round of detection. Moreover, the required time is short and the cost is low. The repeatability of the three detections is very good.

[0066] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. Use of beech wood powder for viscosity detection device for preparing strong glue, characterized in that, The viscosity detection device includes a test box, a liquid transfer device, a pressure block, a timer, and beech wood powder. The beech wood powder is contained in the test box. The liquid transfer device is used to transfer the sample to be tested. The pressure block is used to flatten the surface of the beech wood powder. The timer is used to record the time when the sample penetrates into the beech wood powder; The method for detecting the viscosity of super glue includes the following steps: 1) Pour the powder into the test box and use the bottom of the pressure block to flatten a certain amount of beech wood powder to a certain thickness; 2) Use the liquid transfer device to transfer super glue and drop it into the beech wood powder. Press the timer to start timing at the moment when the super glue is dropped; 3) Press the timer again at the moment when the super glue completely penetrates into the beech wood powder and record the penetration time. When using beech wood powder for detection, when the super glue penetrates into the beech wood powder, the color of the beech wood powder in contact with the super glue becomes significantly darker.

2. A method for detecting the viscosity of a strong glue, characterized in that, Detection is carried out using a viscosity detection device. The viscosity detection device includes a test box, a liquid transfer device, a pressure block, a timer, and a powder. The powder is contained in the test box. The liquid transfer device is used to transfer the sample to be tested. The pressure block is used to flatten the surface of the powder. The timer is used to record the time when the sample penetrates into the powder; the powder is beech wood powder; the detection method includes the following steps: 1) Pour the powder into the test box and use the bottom of the pressure block to flatten a certain amount of the powder to a certain thickness; 2) Use the liquid transfer device to transfer super glue and drop it into the powder. Press the timer to start timing at the moment when the super glue is dropped; 3) Press the timer again at the moment when the super glue completely penetrates into the powder and record the penetration time. When using beech wood powder for detection, when the super glue penetrates into the beech wood powder, the color of the beech wood powder in contact with the super glue becomes significantly darker.

3. The detection method according to claim 2, wherein The pressure block is a weight, the liquid transfer device is a pipette gun, and the timer is a stopwatch; The above steps need to be repeated at least 3 times and the average value is taken.

4. The detection method according to claim 3, characterized in that The test box has a multi-grid structure. Each grid has a size of 5 - 20 cm in length, 5 - 20 cm in width, and the box height is 4 - 10 cm; 100 - 500 g of beech wood powder is filled into one grid of the test box and flattened to a thickness of 2 - 10 cm with a weight.

5. The detection method according to any one of claims 2-4, characterized in that, The standard test conditions for the method are a temperature of 23 ± 2 °C and a relative humidity of 50 ± 5%; Before detection, the super glue and the detection device need to be placed under the standard test conditions for at least 24 h; The volume of the super glue transferred in step 2) is 0.15 ml.

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