CN114324119A - PE film material leakage performance detection method - Google Patents

Abstract

The invention relates to the technical field of performance detection of absorbent product, and discloses a leakage performance detection method for PE film materials, which comprises the steps of preparing a test environment, preparing simulation test liquid, carrying out test, finishing test, judging results and the like.

Description

A kind of PE membrane material leakage performance detection method

technical field

The invention belongs to the technical field of a rapid test method for the performance of absorbent products, and particularly relates to a method for detecting the leakage performance of a PE film material.

Background technique

PE film material is widely used as a necessary material in the field of sanitary products, such as: sanitary napkins, diapers, nursing pads. Almost the production process of the sanitary products industry is to apply the PE film between the core and the bottom film to play the water-repellent and leak-proof function of the PE film. In practical applications, due to the quality defects of the PE film material, the final product often has leakage problems, and the product entering the market will cause a bad user experience.

In the prior art, most of the PE membrane leakage performance detection methods generally use physiological saline as the test solution to simply simulate the composition of urine for leakage detection, and the tester directly observes the leakage of the physiological saline with the naked eye. However, in actual use, users, especially infants and young children, not only produce urine, but also produce feces, and the feces will have a substantial impact on the leakage performance of the PE film. If the PE film product itself has obvious defects , then this effect will be amplified, resulting in the decline of the anti-leakage performance of the PE film product, causing it to fail to function normally and affecting the user's daily experience. In other words, the existing detection methods not only fail to quickly and effectively Detecting the leakage quality defects of PE film materials is not easy to simulate and reflect the real experience of users more intuitively and correctly.

SUMMARY OF THE INVENTION

In view of the technical defects existing in the background technology, the present invention proposes a method for detecting the leakage performance of PE membrane materials, which solves the above-mentioned technical problems and satisfies the actual needs. The specific technical solutions are as follows:

A method for detecting leakage performance of a PE film material, comprising:

A) Prepare the test environment, prepare a leak-proof cushion, place at least 1 layer of plastic film on the cushion, and place at least 5 layers of absorbent paper on the plastic film;

B) Prepare the simulated test solution, add 5 parts of food grade bright blue and 100 parts of soybean oil standard solution to 1000 parts of normal saline and stir well;

C) Carry out the test, take 10 parts of the simulated test solution, drop it on the center of the top absorbent paper and let it stand for 30s, put the PE film to be tested on the top of the absorbent paper, and make the use surface face up, and place it on the PE film. Place a piece of absorbent paper on the film, and then place a weight of equal mass of 5kg;

D) End the test, at the time of T per unit time and after every n×T time point, remove the weights once each, and observe whether the absorbent paper on the upper layer of the PE film has any color phenomenon;

E) Judging the results, measure the color area and the number of color surfaces, and judge the leakage performance based on this.

As a further technical solution of the present invention, the soybean oil standard solution includes soybean oil, emulsifier, 1,2-propanediol, and secondary pure water with electrical conductivity ≤3.0 μs/cm, and the soybean oil standard solution is used to simulate human urine and feces, and produce fatty acids that affect the permeability of PE membranes.

As a further technical solution of the present invention, the proportion of soybean oil, emulsifier, 1,2-propanediol and secondary pure water is 1:2:2:100.

As a further technical solution of the present invention, the preparation method of the soybean oil standard solution is as follows: pour the weighed emulsifier, soybean oil, and 1,2-propanediol into a beaker in turn, and stir until the mixed solution has no obvious granularity. Then, pour into secondary pure water and stir again to obtain soybean oil standard solution.

As a further technical solution of the present invention, in the step E, the color area and the color stain determined by the result are based on the measurement chart values of film stains, scratches and sundries, including the following 3 grades, A grade The leakage performance is that the color stains with a color area ≥ 3.0 square millimeters are not allowed to appear; the leakage performance of Class B is that there are no more than 5 stains with a color area of 1-3 square millimeters; the leakage performance of Grade C is: , there are no more than 10 stains with a color area of ≤ 1 square millimeter.

As a further technical solution of the present invention, the value of T is 5min, the value of n is 1, 2, 3, 4, 5, 6, and the value of n×T is to simulate the leakage time under different usage durations.

As a further technical solution of the present invention, the PE film includes two types of cast film and blown film, and the same judgment standard is adopted.

Since the PE film is used as a protective structure for anti-leakage of absorbent products, it is arranged on the outer side of the diaper and does not directly participate in the absorption process of the diaper. Compared with the water absorption performance of the core, it is not so easy to cause ordinary users Attention, but its anti-leakage ability is the key to the impact of absorbent products on the outside world and the quality of user experience.

Therefore, the present invention has the beneficial effects that the present invention can reasonably and effectively classify the leakage performance of PE film products, especially cast films and blown films, in an intuitive, easy-to-operate, and quantitative manner, and give With the corresponding qualification judgment basis, PE film product developers can intuitively and accurately observe the test results that are basically consistent with the real user experience, and quickly find the defect position of PE film products, so that PE film product developers can pass the corresponding The detection data can quickly and accurately identify the anti-leakage performance of the PE film, so as to find the direction to improve the subsequent production process, find the PE film product that is most suitable for the specific application environment, and then improve the production quality of absorbent products.

Description of drawings

Figure 1 is a schematic view of the appearance of the absorbent paper stack before the test.

Fig. 2 is a schematic diagram showing the appearance of the absorbent paper pile after dripping with bright blue simulated test solution during the test.

FIG. 3 is a schematic diagram of the state of adding the PE film to be tested during the test.

FIG. 4 is a schematic diagram of the state after the weight is applied during the test.

Fig. 5 is the test result of dripping 5mL of soybean oil-containing simulation test solution.

Fig. 6 is the test result of dripping 10mL of soybean oil-containing simulation test solution.

Fig. 7 is the test result of dripping 15mL of soybean oil-containing simulation test solution.

Fig. 8 is the test result of dripping 5mL of rapeseed oil-containing simulation test solution.

Fig. 9 is the test result of dripping 10 mL of rapeseed oil-containing simulated test solution.

Fig. 10 is the test result of dripping 10 mL of physiological saline simulation test solution.

Fig. 11 is the test result of dripping 10 mL of edible oil-containing simulated test liquid.

Detailed ways

The embodiments of the present invention will be described below with reference to the accompanying drawings and related embodiments. The embodiments of the present invention are not limited to the following embodiments, and the present invention relates to the relevant necessary components in the technical field, which should be regarded as those in the technical field. Known technologies are known and mastered by those skilled in the art.

With reference to Figures 1 to 4, a method for detecting the leakage performance of a PE film material includes:

A) Prepare the test environment, prepare a leak-proof cushion, place at least 1 layer of plastic film on the cushion, and place at least 5 layers of absorbent paper on the plastic film;

B) Prepare the simulated test solution, add 5 parts of food grade bright blue and 100 parts of soybean oil standard solution to 1000 parts of normal saline and stir well;

C) Carry out the test, take 10 parts of the simulated test solution, drop it on the center of the top absorbent paper and let it stand for 30s, put the PE film to be tested on the top of the absorbent paper, and make the use surface face up, and place it on the PE film. Place a piece of absorbent paper on the film, and then place a weight of equal mass of 5kg;

D) End the test, at the time of T per unit time and after every n×T time point, remove the weights once each, and observe whether the absorbent paper on the upper layer of the PE film has any color phenomenon;

E) Judging the results, measure the color area and the number of color surfaces, and judge the leakage performance based on this.

When preparing the test environment for the PE film sample to be tested, the size of the plastic film used as the cushion must be larger than that of the absorbent paper. In this test method, the role of the absorbent paper is to simulate the core of different thicknesses absorbing the simulated test liquid. Leakage at different times. For the same purpose, the size of the PE film sample to be tested should also be smaller than the size of the absorbent paper, so as to ensure that the sample of the PE film to be tested is under the same test environment as a whole when it is tested; in the present invention , in order to better observe the color effect, if the filter paper used in the general air permeability test or the water absorption test is replaced with the absorbent paper in the present invention, the color effect cannot reach the obvious effect disclosed in the present invention visible to the naked eye, At the same time, the real leakage situation after the core absorbs moisture in actual use cannot be simulated correctly, so the absorbent paper cannot be replaced with filter paper.

The simulation test solution uses physiological saline to imitate human urine, which is the most common and reproducible simulation solution in the field to test the performance of absorbent products. Soybean oil is a combination of two ways to simulate the amount of fat remaining in loose stools after emulsification and absorption of breast milk with different fat contents by infants and young children. 5ml, 10ml and 15ml correspond to light, medium and severe fat content respectively. Test for leaks. At the same time, since it is necessary to measure the area of the color by the naked eye, transparent mm grid or debris measurement chart, etc., to calculate the reference for judging the leakage performance, so 5 parts of food were added dropwise to every 1,000 parts of the test solution. High-grade bright blue, on the one hand, will not change the penetration performance of the test solution itself, on the other hand, it will make the color rendering of the color more intuitive and easy to measure.

In the test method of the present invention, in addition to intuitively seeing the leakage of different PE films under quantifiable experimental conditions, the area of blemishes can be measured by naked eyes, transparent mm grids or debris measurement charts, etc. , in order to directly obtain the corresponding performance level data of the PE film test sample. At the same time, because the influence of feces on the performance of PE film can be simulated, the addition of its bright blue color does not affect the simulation effect of the test solution. Test developers can quickly find the defect areas on the surface of PE film products that are invisible to the naked eye through the color change, so that developers can more intuitively observe the performance of the product from the user's point of view and find existing problems and improvements. direction.

Meanwhile, in the preferred embodiment, the three components of 5mL, 10mL and 15mL can also simulate the leakage of urine in different age stages. It is more intuitive to judge whether it meets the test judgment standard through the leakage color area and leakage point.

In the specific test, considering that the PE film is used as the bottom film, except when the user sits or lies down, the absorbent product is compressed and the PE film is also passively contacted with the exudate of the core. The tester is active, and at the same time, in order to operate the test tool more quickly to add samples, conduct tests, and take samples. In contrast to the general common sense that is conventionally selected by those skilled in the art or commonly replaced by those skilled in the art, in the test method disclosed in the present invention, the product to be tested is placed under the liquid source and pressure is applied from top to bottom to test the absorption In the case of ability, wait for 30 seconds to allow the absorbent paper layer to fully restore the state of the absorbent core after absorbing water. After the absorbent paper used to collect the test results is placed on the top, a weight of 5kg is applied. In this way, it is convenient for the tester to take samples, and it can also restore the situation that the user's clothing exerts pressure on the absorbent product when the user is in an active state, and the pressure in this case usually does not exceed the 5kg counterweight. pressure.

In order to collect the color data of the PE film product to be tested as accurately as possible within a reasonable time, and to quantify the test results and reduce errors caused by accidental factors, in this application, the number of data records for the same PE film product to be tested is Not less than 1 time, and every unit time T records 1 color result, considering the angle of quantifying test time and the convenience of recording test results, the preferred value of unit time T is 5 minutes, and the value of n is 5 minutes. The maximum value does not exceed 6, that is, 30 minutes is the longest test time for a single PE test sample.

For the purpose of quantifying leakage performance, the test method disclosed in the present invention uses stains, scratches, debris measurement charts, and transparent mm grids to measure the area of the stained spots, which can facilitate the tester to accurately quantify the ever-changing situation of the stained pattern. It avoids the problem that it is too difficult to calculate the color area, and can shorten the time for result recording and analysis, which is conducive to the occasion of mass testing product performance, and also meets the fundamental purpose of accelerating technology research and development.

In the present invention, the soybean oil standard solvent is used as the additive of the physiological saline, and the fundamental purpose is that the soybean oil is added with an emulsifier to simulate the residual situation of fat after absorption and emulsification by the human body, because the critical point of the emulsifier is 70 ° C, adding 1, 2-Propanediol is a solution prepared for better dissolution. And also for the stability of the color pattern display, especially for the test of PE film, because the PE film is triggered from the perspective of leakage prevention, the water absorption performance is far less than that of the polymer materials used in the absorption core and the surface layer. , in order to facilitate color development and the diffusion of bright blue, it is also necessary to configure the physiological saline added with soybean oil standard solvent for testing. In addition, as a reference, the present invention introduces rapeseed oil standard solvent as a control group for testing. The accuracy and effectiveness of demonstrating the use of soybean oil standard solvent addition of normal saline will be elucidated below.

In the preferred embodiment of the present invention, 1000mL of physiological saline was selected to add 0.5g of food grade bright blue and 100mL of soybean oil standard solution, and at the same time, the rapeseed oil standard solution as a control group was added to compare the difference between the two, The following test results are directly obtained through experiments based on the test parameters in this embodiment.

Referring to Fig. 3 and Fig. 4, in order to better quantify the test results and increase convincing power, under the preferred embodiment of the present invention, the selected PE film sample to be tested has a diameter of 200mm, which is suitable for the shape of the absorbent paper, and at the same time. , In order to prepare the test solution and test, it is also necessary to prepare electronic balance, stopwatch, kettle, 250ml beaker, glass rod, glue tip dropper, 100ml, 10ml, 5ml measuring cylinder, 500ml plastic measuring cup, thermometer, 5kg weight, stain , scratches, transparent mm grids, debris measurement charts and other necessary instruments or objective reference materials.

As a further technical solution of the present invention, the soybean oil standard solution includes soybean oil, emulsifier, 1,2-propanediol, and secondary pure water with electrical conductivity ≤3.0 μs/cm, and the soybean oil standard solution is used to simulate human Urine and feces, and produce fatty acids that affect the permeability of PE membranes, of which, secondary pure water with electrical conductivity ≤ 3.0 μs/cm is used in order to better mix with emulsifiers, soybean oil and 1,2-propanediol. The temperature of 70°C is suitable because the critical emulsification temperature of the emulsifier is 70°C. Neither below nor above the emulsification critical temperature has been tested as an optimal option and should therefore comply with this determination.

The purpose of the soybean standard solution used in the present invention is to simulate the urine and fecal composition of users, especially infants. It will contain fatty acids, and fatty acids have an impact on the performance of the PE membrane, and this impact is directly reflected in the decrease in the anti-permeability of the PE membrane. The specific reasons are: first, the main raw material of PE film is low-density polyethylene, chain transfer reaction occurs during synthesis, there is a gap between the polymer chains, and the gap may be larger than the oil molecule during production; the second PE film and fatty acid They are both non-polar molecules, and they will dissolve in each other, that is, the principle of similar compatibility. The contact between the two will cause the micropore size of the PE film to change, which in turn will cause changes in the breathable and waterproof performance. Based on the above reasons, after the PE film comes into contact with the feces of infants and young children containing fatty acids, it is very easy to cause leakage, which will cause inconvenience in use. However, the existing physiological saline test solution cannot truly and accurately reflect the above phenomenon. Therefore, in order to better grasp the anti-permeability performance of the PE membrane, the general physiological saline bionic solution is not enough to meet the test requirements.

As a further technical solution of the present invention, the proportion of soybean oil, emulsifier, 1,2-propanediol and water is 1:2:2:100, specifically, the test method quantified under the preferred embodiment of the present invention should be 1mL, 2mL, 2mL, and 100mL, respectively.

As a further technical solution of the present invention, the preparation method of the soybean oil standard solution is as follows: pour the weighed emulsifier, soybean oil, and 1,2-propanediol into a beaker in turn, and stir until the mixed solution has no obvious granularity. Then, pour into secondary pure water and stir again to obtain soybean oil standard solution.

If the PE film has a uniform thickness and texture, and the pore opening process is good, if it is modified by fatty acid, the modification should also be uniform, but this is only an ideal state. The reality is that it is difficult to ensure that the PE film is processed. At the same time, the film formation and pore opening operations can be completed perfectly, so that the thickness of the film body in some areas will not reach the average level, and once this part of the film body is modified, it is easy to cause leakage. , in order to make the colorant appear on the PE film to be tested clearly, another important function of the soybean oil standard solution in the present invention is to directly affect the PE film, make it denatured, and enlarge the pore size of the micropores at the defect position The size of the PE film induces the color phenomenon of the PE film, so that the testers can use the color to distinguish the defects on the surface of the PE film and other parameters related to the measurement of the permeability. The modification of the PE film caused by the salt water is not conducive to quickly and accurately simulating the real user experience of the user.

In order to further illustrate the present invention, different proportions of different types of oils will be used to verify the optimum value addition amount - data verification, so as to ensure that the color effect can detect the permeability of the PE membrane, in other words, to detect the surface of the PE membrane Whether the pore size distribution is uniform or not, the thickness distribution is uniform or not, and the specific test results are given below. It should be pointed out that the existing air permeability test is generally carried out with water or physiological saline. After applying pressure to the PE film in which the physiological saline or the physiological saline with added pigment is applied, it is checked whether there are water droplets. The permeability of the PE film is judged by exudation, but the anti-leakage property is related to the fecal excretion containing more fatty acids. The important reason is that the urine volume of infants and young children is larger than the feces volume, and their main diet is breast milk. Or blended milk. In addition to water, the main components of the total excrement contain more fatty acids that affect the permeability of PE membranes. Once the physical properties of PE membranes are changed due to fatty acids in feces, it will affect infants and young children. The user experience, so in order to accurately obtain the user's actual experience record, it is necessary to use grease as the test liquid additive.

As a further technical solution of the present invention, the value of T is 5min, the value of n is 1, 2, 3, 4, 5, 6, and the value of n×T is to simulate the leakage time under different use durations. The interval of leakage time can more accurately quantify the data composition of the test, which is convenient for developers to judge the actual performance change curve of PE film products, so as to grasp the more likely reasons that will affect the leakage performance.

As a further technical solution of the present invention, the PE film includes two types of cast film and blown film, and the same judgment standard is adopted. Since the commonly used materials for PE film are generally cast film and blown film, only the above two materials are considered in the test method disclosed in the present invention, and other materials with similar properties can also refer to the test process of the above two materials, and adopt consistent comparison of test results.

As a further technical solution of the present invention, in the step E, the color area and the color stain determined by the result are based on the measurement chart values of film stains, scratches and sundries, including the following 3 grades, A grade The leakage performance is that the color stains with a color area ≥ 3.0 square millimeters are not allowed to appear; the leakage performance of Class B is that there are no more than 5 stains with a color area of 1-3 square millimeters; the leakage performance of Grade C is: , there are no more than 10 stains with a stain area of ≤ 1 square millimeter. This is because when the stain phenomenon is more obvious, the diaper product is actually in a situation that needs to be replaced, so the above judgment label is more in line with the actual use of diapers At the same time, because absorbent paper is used as the test material to simulate the absorbent core, the color will be more obvious and easy to observe.

Based on the test environment and test sample specifications in the aforementioned preferred embodiment, the present invention discloses a standard solution based on soybean oil and a standard solution based on rapeseed oil, which can be used on blown films and cast films of the same specifications. , the sampling time is 5 minutes, 10 minutes, 15 minutes, 20 minutes and 30 minutes. In the following Figures 5 to 11, the results in the left column are blown film, while the results in the right column are cast film , the specific test results are as follows:

Under the soybean oil standard solution, as shown in Figure 5, 5mL of the test solution was added dropwise, and the blown film was pressed for 5 minutes to have 5 color spots and a color area of 2.4 square millimeters, while the cast film did not have color or color. Area; the blown film pressed for 10 minutes has 10 color spots, and the color area is 9.65 square millimeters, while the cast film has no color and no color area; the blown film pressed for 15 minutes has more than 50 color points, and the color area is more than 50. The color area is greater than 200 square millimeters, while the cast film has 2 color spots and a color area of 1.2 square millimeters; the blown film that has been pressed for 20 minutes has more than 50 color points and a color area of more than 300 square millimeters. The film has 3 color spots and a color area of 0.6 square millimeters; the blown film has more than 50 color points and a color area of more than 300 square millimeters after being pressed for 30 minutes, while the cast film has more than 30 color points. The color area is greater than 30 square millimeters.

Referring to Figure 6, add 10 mL of test solution dropwise, press the blown film for 5 minutes to have 3 color spots and a color area of 4.4 square millimeters, while the cast film has no color and no color area; The blown film has 5 color spots and a color area of 1.9 square millimeters, while the cast film has 2 color points and a color area of 0.9 square millimeters; the blown film that is pressed for 15 minutes has 5 color points and a color area. 5.3 square millimeters, while the cast film has 2 color spots and a color area of 0.78 square millimeters; the blown film pressed for 20 minutes has 6 color points and a color area of 8.8 square millimeters, while the cast film has 6 color points and a color area of 8.8 square millimeters. For 2, the color area is 1.2 square millimeters; the blown film pressed for 30 minutes has 6 color points and a color area of 13 square mm, while the cast film has 5 color points and a color area of 2.6 square mm.

Referring to Figure 7, add 15mL of test solution dropwise, press the blown film for 5 minutes to have 4 color spots and a color area of 77 square millimeters, while the cast film does not color and has no color area; The blown film has 21 color points and a color area of 52.25 square millimeters, while the cast film has 4 color points and a color area of 1.75 square millimeters; the blown film that is pressed for 15 minutes has 25 color points and a color area. 65.15 square millimeters, while the cast film has 6 color spots and a color area of 9.6 square millimeters; the blown film that has been pressed for 20 minutes has more than 50 color points and a color area of more than 200 square millimeters. The color points are more than 21, and the color area is 14.7 square millimeters; the blown film after pressing for 30 minutes has more than 50 color points, and the color area is more than 300 square millimeters, while the cast film has more than 30 color points, and the color area is more than 30. 24.6 square millimeters.

Referring to Fig. 8, because when the addition amount is 10mL, the cast film has been fading, so the test process under the 15mL occasion is omitted, and the test result under the rapeseed oil standard solution is, drip 5mL test solution, press The 5-minute blown film has 4 color spots and a color area of 0.2 square millimeters, while the cast film has no color and no color area; the blown film that is pressed for 10 minutes has 6 color points and a color area of 13.5 square millimeters, while the cast film has no tint and no tint area; the blown film pressed for 15 minutes has 9 tint points and a tint area of 121 square millimeters, while the cast film has 2 tint points and a tint area. It is 1.0 square millimeters; the blown film has 11 color spots and a color area of 33.3 square millimeters after pressing for 20 minutes, while the cast film has 5 color points and a color area of 2.4 square millimeters; the blown film is pressed for 30 minutes. There are 32 color spots and a color area of more than 200 square millimeters, while the cast film has 7 color points and a color area of 6.8 square millimeters.

Referring to Figure 9, add 10 mL of test solution dropwise, and press the blown film and the cast film for 5 minutes with no color and no color area; the blown film pressed for 10 minutes has 3 color spots and a color area of 12. Square mm, while the cast film has no color and the color area is 0; the blown film pressed for 15 minutes has 12 color points and a color area of 36 square millimeters, while the cast film has 6 color points and a color area. It is 11.7 square millimeters; the blown film pressed for 20 minutes has 24 color spots and a color area of 43.2 square millimeters, while the cast film has 12 color points and a color area of 19.8 square millimeters; the blown film is pressed for 30 minutes. There are 17 color spots and a color area of 286.9 square millimeters, while the cast film has 8 color points and a color area of 16.9 square millimeters.

In order to specifically illustrate that the present invention adopts the method of adding oil to simulate the influence of urine and fecal components on the permeability of PE membrane, please refer to FIG. 10 . For the test solution, the same 5kg weight was used as the counterweight, 10mL of the test solution was added dropwise, and other test conditions consistent with those in the preceding examples showed no color after 5 minutes of pressure and 10 minutes of pressure, indicating that inorganic salt urine is not suitable for urine. The impermeability of the PE film has little effect.

Referring to Figure 11, what was added dropwise was adding 0.5g of edible-grade bright blue and 15mL of edible oil to 1000mL of normal saline—especially after peanut oil, using the same 5kg weight as the counterweight, and adding 10mL of the test solution dropwise, and Other test conditions that are consistent with the previous examples, when pressed for 5 minutes, the cast film and the blown film have no obvious color phenomenon, and when pressed for 10 minutes, both the cast film and the blown film have a color phenomenon, indicating that the fatty acid It is an important factor affecting the change of the anti-penetration performance of the PE film, and it also proves that the test method of the present invention can be extended and applied to other oil additives that can produce fatty acids after emulsification, and has a certain degree of observation effect, but there is no soybean oil as oil. Additives work so well.

As can be seen, the use of soybean oil, rapeseed oil or other edible oils such as oil and fat test solutions that can produce fatty acids can produce visible color effects to the above-mentioned test sample, which proves that the test solution in the present invention can better reflect However, the use of soybean oil as the component of the standard solution has more linear rationality and accuracy than rapeseed oil in the test data. The test data obtained from rapeseed oil The number of points and the color area are unstable, which cannot correctly reflect the real performance of the test product under different occasions. Therefore, it is more reasonable to use soybean oil as the additive of the test liquid than rapeseed oil.

Since the material properties of the PE film are basically different from those of the above two basic materials, and combined with the above data, it can be seen that the test performance of the cast film is obviously better than that of the blown film product, which is also different from the actual performance parameters of the above materials. To be consistent, it shows that the standard of the test method of the present invention also conforms to the fact of objective law, and can be extended to other products that are also applied to the technical field of anti-leakage and their specific applications are consistent.

Among them, through the content of the test results disclosed in the present invention, the following basic conclusions can be drawn: the anti-leakage performance level of the blown film product corresponding to the test result is not meeting the C-level standard, and the corresponding cast film product meets the The A-level standard, its measurement method is relatively operable and has obvious reference, so it can also be shown that the test method of the present invention satisfies the development of absorbent products in the prior art, for other PE film samples. The test requirements for anti-leakage performance can also be met correspondingly, which has practical value that can be promoted and applied. At the same time, because the test method of the present invention can intuitively check the permeability performance of PE film products, whether it is a consumer or a developer. , can visually display the defects of the PE film itself that are invisible to the naked eye, helping consumers or developers to choose suitable products more quickly and rationally.

Therefore, the present invention can classify PE film products, especially cast film and blown film, into a reasonable and effective leakage performance grade in an intuitive, easy-to-operate, and quantitative manner, and provide the corresponding qualification basis. PE film product developers can intuitively and accurately observe the test results that are basically consistent with the real user experience, quickly find the defect location of PE film products, and allow PE film product developers to quickly and accurately identify PE film through the corresponding test data. The anti-leakage performance of the film can be used to find the direction of improving the subsequent production process, find the PE film product most suitable for a specific application environment, and then improve the production quality of absorbent products.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as It is the protection scope of the present invention.

Claims (7)

1. a PE film material leakage performance detection method, is characterized in that, comprises: A) Prepare the test environment, prepare a leak-proof cushion, place at least 1 layer of plastic film on the cushion, and place at least 5 layers of absorbent paper on the plastic film; B) Prepare the simulated test solution, add 5 parts of food grade bright blue and 100 parts of soybean oil standard solution to 1000 parts of normal saline and stir well; C) Carry out the test, take 10 parts of the simulated test solution, drop it on the center of the top absorbent paper and let it stand for 30s, put the PE film to be tested on the top of the absorbent paper, and make the use surface face up, and place it on the PE film. Place a piece of absorbent paper on the film, and then place a weight of equal mass of 5kg; D) End the test, at the time of T per unit time and after every n×T time point, remove the weights once each, and observe whether the absorbent paper on the upper layer of the PE film has any color phenomenon; E) Judging the results, measure the color area and the number of color surfaces, and judge the leakage performance based on this. 2. The method for detecting the leakage performance of PE membrane material according to claim 1, wherein the soybean oil standard solution comprises soybean oil, an emulsifier, 1,2-propanediol, a dihydrate with an electrical conductivity≤3.0 μs/cm Grade pure water, the soybean oil standard solution is used to simulate human urine and feces, and produce fatty acids that affect the permeability of PE membranes. 3. The method for detecting leakage performance of PE membrane material according to claim 2, wherein the proportion of the soybean oil, emulsifier, 1,2-propanediol and secondary pure water is 1:2:2 : 100. 4. PE film material leakage performance detection method according to claim 2 or 3, is characterized in that, the compound method of described soybean oil standard solution is, will weighed emulsifier, soybean oil, 1,2- Propylene glycol is poured into the beaker in turn, stirred evenly until the mixture has no obvious granularity, poured into secondary pure water and stirred again to obtain the soybean oil standard solution. 5. according to the PE film material leakage performance detection method described in any one of claim 1-3, it is characterized in that, in described step E, the color area and color stain of result judgment are film paper stains, scratches. Marks and sundries are measured on the basis of chart values, including the following 3 grades, the leakage performance of grade A is that the stains with a stain area of ≥ 3.0 square millimeters are not allowed to appear; the leakage performance of grade B is that the stain area is 1 - No more than 5 stains of 3 square millimeters; Class C leakage performance is no more than 10 stains with a stain area of ≤ 1 square millimeter. 6. The method for detecting leakage performance of PE film material according to claim 1, wherein the value of T is 5min, the value of n is 1, 2, 3, 4, 5, 6, n× The T value simulates the leakage time under different usage durations. 7 . The method for detecting leakage performance of PE film material according to claim 5 , wherein the PE film includes two types of cast film and blown film, and the same judgment standard is adopted. 8 .

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