A detection device and detection method for the pollen adsorption index on the surface of textiles

Abstract

The present invention belongs to the technical field of pollen testing on the surface of textiles, and discloses a detection device for the pollen adsorption index on the surface of textiles, which includes a pollen chamber, a gravity impact pollen removal device, and an electron microscope; a vibrating screen and a drum are arranged up and down in the pollen chamber. The gravity impact pollen removal device includes a sample bracket, a sample rack, and an electromagnetic relay. Also disclosed is a detection method for the pollen adsorption index on the surface of textiles, which includes difficult adsorption detection and easy detachment detection. The vibrating screen and the drum are used to simulate the pollen floating environment and the movement of the sample's independent adsorption of pollen, and free-fall motion is adopted to test the difficult adhesion and easy detachment of the pollen of the sample on the fabric, so as to evaluate the pollen-proof property of the sample. This method is simple to operate, has high reproducibility, low cost, and has good application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of pollen testing on the surface of textiles, and particularly relates to a detection device and a detection method for the pollen adsorption index on the surface of textiles. Background Art

[0002] Nowadays, due to the deterioration of the global environment, the accelerating speed of greening, and the introduction of foreign plants, the types and quantities of pollen particles in the air have increased significantly. At present, the antigens of pollen diseases have exceeded 40 kinds. New statistical results show that the prevalence of pollen allergy has an obvious upward trend in almost all industrialized countries. In daily life, pollen is inevitable, and the air or clothing will carry pollen into the room and stay on curtains, sofas, carpets, bedding, etc. for a long time. The nasal mucosa, gastrointestinal mucosa, and the cells around the microvessels in the subcutaneous connective tissue of the skin and the cells of internal organs in the human body are easily affected by the environment and have allergic reactions. After coming into contact with pollen, the onset of pollen allergy is long and easy to relapse, which has a bad impact on people's daily life and work, especially for special groups such as infants, pregnant women, and postoperative patients.

[0003] Therefore, in order to reduce the way for pollen to approach the human body, fabrics with anti-pollen functions have emerged as the times require. For textiles used in different environments, scientists have developed two special anti-pollen textiles. One method is to repel pollen, that is, to prevent pollen from adhering to clothes; the other method is to absorb pollen. Both methods belong to the biological functional treatment method, but the principles and uses are completely opposite. The first type of fabric is usually used for clothes. High-quality high-density fabrics are selected, and anti-pollen adhesion finishing agents are used and processed by special processes. Its surface can reach a quite high smoothness, making it difficult for pollen to adhere to the fabric. It is also possible to add materials such as anti-static filter cores or activated carbon filter cores to make it difficult for pollen to penetrate the fabric. The second type of adsorbent anti-pollen textiles is mainly used for sofas, carpets, curtains, etc., to reduce the amount of pollen entering the room or the amount of pollen floating in the room, thereby reducing the chance for pollen allergy patients to come into contact with pollen. Both methods can endow the fabric with the special function of preventing pollen from passing through, enabling people to be protected from or less affected by pollen, so they are favored by pollen allergy people at home and abroad.

[0004] With the wide application of products with special anti-pollen functions, how to evaluate the anti-pollen performance of fabrics has become a key issue. So far, foreign countries such as the International Organization for Standardization, the United States, the European Union, Japan, and the United Kingdom have not issued any test method standards for the anti-pollen performance of fabrics, and there are few relevant research reports. The anti-pollen standard (GB / T29864-2013) issued in China stipulates the air flow method for textiles to prevent pollen. The patent document CN201110183064.6 is the air flow method for textiles to prevent pollen. However, due to the air flow attraction effect, this method is not applicable to some fabrics with poor air permeability, such as coated fabrics and flocked fabrics.

[0005] The common defect of the above existing technologies is that the pollen presents a static state during the test, which does not conform to the state of pollen floating in the air in reality, and the test method is not applicable to some fabrics with poor air permeability. Summary of the Invention

[0006] The present invention aims at the above problems and provides a detection device and a detection method for the pollen adsorption index on the surface of textiles.

[0007] The object of the present invention can be achieved by the following technical solutions: A detection device for the pollen adsorption index on the surface of textiles includes a pollen chamber, a gravity impact pollen removal device, and an electron microscope; in the pollen chamber, a vibrating screen and a drum are arranged up and down. The vibrating screen and the drum are both horizontally placed and are respectively driven by motors. Fabric fixing parts are arranged along the circumference of the drum; the gravity impact pollen removal device includes a sample bracket, a sample rack, and an electromagnetic relay. The sample bracket is located at a certain height and its position is fixed or free-falls under the control of the electromagnetic relay. The sample rack is installed on the sample bracket.

[0008] Further, the gravity impact pollen removal device includes a rectangular box body. Vertically arranged lead screws are respectively arranged at the four corners inside the box body. A sample bracket is respectively arranged on two lead screws on one side and two lead screws on the other side. An electromagnetic relay is arranged on the sample bracket on one side. The sample brackets on both sides are connected by a connecting rod, and the sample brackets on both sides adsorb and fix the sample rack by magnetic force.

[0009] Further, an impact counter is arranged at the bottom of the box body.

[0010] Further, a height scale is arranged on the box body.

[0011] A detection method for the pollen adsorption index on the surface of textiles includes difficult adsorption detection and easy detachment detection;

[0012] The difficult adsorption detection includes: conditioning the sample before detection; fixing the sample on a roller; taking pollen and spreading it on a vibrating sieve mesh directly above the roller, starting the vibration of the sieve mesh to make the pollen fall evenly and freely. At the same time, the roller drives the sample to rotate at a low speed for 1 - 10 minutes to adsorb the pollen; then the roller drives the sample to rotate at a high speed for 1 - 3 minutes to remove the accumulated pollen by centrifugal force; removing the sample and taking a magnified photo of the sample with an electron microscope, and judging the pollen attachment situation of the sample with an evaluation standard as the result of difficult attachment.

[0013] The easy detachment detection includes: installing the above-mentioned sample with attached pollen on a sample rack, ensuring that the front of the sample faces downwards, and making it fall freely from a height of 5 - 50 cm in a horizontal state by its own weight; removing the sample and taking a magnified photo of the sample with an electron microscope, and judging the pollen attachment situation of the sample with an evaluation standard as the result of easy detachment.

[0014] Further, in the difficult adsorption detection, the pollen falls evenly and freely after being vibrated by the vibrating sieve mesh and is distributed in a square area with a side length of 10 - 75 cm below the vibrating sieve mesh.

[0015] Further, according to the detection method of the pollen adsorption index on the textile surface as described in claim 5 or 6, it is characterized in that, in the difficult adsorption detection, the sample before detection is cut into a square with a side length of 10 - 15 cm.

[0016] Compared with the prior art, the advantages of the detection device of the present invention are as follows: using a mechanical vibrating sieve mesh to sprinkle pollen, the pollen distribution in the environment is more uniform and natural, which is beneficial to the next step of uniform distribution of pollen on the fabric; the roller centrifugal powder removal and gravity impact powder removal are all mechanical actions, avoiding human influence, and the measurement results are objective and accurate.

[0017] The advantages of the detection method of the present invention are as follows: using the vibration of pollen from the sieve mesh to simulate the pollen floating environment, the sample rotates at a low speed with the roller so that the pollen in free fall can be evenly adsorbed onto the fabric, and the difficult attachment of the sample is characterized by testing the adsorption degree of pollen on the sample. Making the sample with attached pollen fall freely from a certain height, when the sample rack hits the ground, the pollen continues to move due to inertia and falls off from the fabric, and the easy detachment is characterized by testing the remaining pollen on the sample. Evaluating the anti - pollen property of the sample by the difficult attachment and easy detachment of pollen on the fabric, achieving the purpose of accurately detecting the anti - pollen property of the sample. This method is simple to operate, has high reproducibility, low cost, and has good application prospects. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the pollen chamber.

[0019] Figure 2It is a schematic structural diagram of a gravity impact powder removal device.

[0020] Figure 3 It is a schematic structural diagram of the sample brackets on both sides.

[0021] Figure 4 It is a top view of the sample rack.

[0022] Figure 5 For Figure 4 The sectional view taken along the A-A plane in

[0023] Figure 6 It is a schematic diagram of an electron microscope scan of a pollen reference material.

[0024] The labels in the figure are as follows:

[0025] 1. Vibration sieve mesh, 2. Drum, 3. Motor, 4. Box body, 5. Lead screw, 6. Sample bracket, 7. Electromagnetic relay, 8. Connecting rod, 9. Sample rack, 10. Impact counter. Specific implementation mode

[0026] The following describes in detail the specific implementation mode of the present invention with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative and do not limit the scope of the present invention.

[0027] A detection device and a detection method for the pollen adsorption index on the surface of textiles, including a pollen chamber, a gravity impact powder removal device, and an electron microscope.

[0028] See Figure 1 , in the pollen chamber, a vibration sieve mesh 1 and a drum 2 are arranged vertically. The vibration sieve mesh 1 and the drum 2 are both horizontally placed and are respectively driven by a motor 3. Fabric fixing members are provided along the circumference of the drum 2, and the fabric fixing members can be four bolts. The motors 3 of the vibration sieve mesh 1 and the drum 2 are controlled by a motor control cabinet.

[0029] The vibration sieve mesh 1 shakes off pollen from top to bottom at a certain frequency, forming a simulated pollen floating environment. The size of the vibration sieve mesh 1 can be about Ø = 50 mm in diameter, with a pore size of 50 - 2000 mesh and an amplitude of 1 cm. The drum 2 rotates at a certain speed. Low-speed rotation helps the fabric evenly adsorb pollen, and high-speed rotation generates a certain centrifugal force, which helps the pollen on the fabric to centrifuge and fall off. By adjusting the rotation speed and rotation time, the quantitative control of the pollen shedding on the fabric surface can be achieved, and the difficult adsorption performance of pollen on the fabric can be detected. The drum 2 can be a stainless steel cylinder, with a length of 100 - 150 mm, an outer diameter of 75 - 100 mm, and a rotation speed of 50 - 3000 r / min.

[0030] See Figure 2 And Figure 3, the gravity impact powder removal device includes a rectangular box body 4. Vertical lead screws 5 are respectively arranged at the four corners inside the box body 4. Sample brackets 6 are respectively arranged on two lead screws 5 on one side and two lead screws 5 on the other side. An electromagnetic relay 7 is arranged on the sample bracket 6 on one side. The sample brackets 6 on both sides are connected by a connecting rod 8. The sample brackets 6 on both sides are provided with a sample rack 9 by magnetic adsorption. For the sample rack 9, see Figure 4 and Figure 5 . An impact counter 10 is arranged at the bottom of the box body 4. A height gauge can also be arranged on the box body 4 to facilitate visually adjusting the heights of the sample bracket 6 and the sample rack 9 on the lead screw 5.

[0031] The gravity impact powder removal device can control the free fall of the sample rack 9 from a certain height through the electromagnetic relay 7. By adjusting the height where the sample rack 9 is located, the amount of pollen falling off the surface of the fabric can be quantitatively controlled, and the easy-to-fall-off performance of pollen on the fabric can be detected.

[0032] Electron microscope: The purpose is to take magnified photos of the test samples and observe the differences in the degree of pollen falling off the samples before and after vibration. The magnification is not less than 100 times.

[0033] A detection method for the pollen adsorption index on the surface of textiles includes difficult adsorption detection and easy detachment detection.

[0034] Raw materials to be tested: textiles and pollen reference materials. Equipment used: pollen chamber, gravity impact powder removal device, electron microscope. The detection purpose is to detect the anti-pollen performance of textiles, that is: difficult adsorption and easy detachment.

[0035] Among them, the electron microscope scanning photo (3000 times) of the pollen reference material can be seen in Figure 6 . Each plant has its own pollen. There are a wide variety of plant species and countless pollen types. According to relevant botanical literature, the pollen diameter is generally in the range of 20 - 50μm. Since the diameters of pollen grains are different, for the same sample, if different pollens are used during testing, it will affect the test results. Therefore, for the same test sample, the same kind of pollen must be used. During this test process, it is preferably uniformly adopted the pollen reference material for biological component analysis developed by the Institute of Geophysical and Geochemical Exploration and approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China.

[0036] The difficult adsorption detection includes: sample humidity adjustment before detection; fixing the sample on the drum 2; taking pollen and spreading it on the vibrating screen 1 directly above the drum 2, starting the vibration of the vibrating screen 1 to make the pollen fall evenly and freely. At the same time, the drum 2 drives the sample to rotate at a lower speed for 1 - 10 minutes to adsorb the pollen; then the drum 2 drives the sample to rotate at a higher speed for 1 - 3 minutes, and the centrifugal force removes the accumulated pollen; removing the sample and taking a magnified sample photo with an electron microscope, and using the evaluation criteria to determine the pollen attachment situation of the sample as the result of difficult attachment.

[0037] The easy detachment detection includes: installing the above-mentioned sample with pollen on the sample holder 9, ensuring that the front of the sample faces downwards, and making it fall freely from a height of 5 - 50 cm in a horizontal state by its own weight; removing the sample and taking a magnified sample photo with an electron microscope, and using the evaluation criteria to determine the pollen attachment situation of the sample as the result of easy detachment.

[0038] The following uses a detection test for specific application of this detection method to illustrate.

[0039] Detection Test 1

[0040] Select the all-cotton woven outer fabric as the textile sample.

[0041] Difficult attachment detection: Adjust the humidity of the sample for more than 4 hours under standard conditions, cut a 100mm×100mm sample and fix it on the drum 2; next, take 0.06g of pollen and spread it on the sieve, start the vibration of the sieve to make the pollen fall evenly and freely. At the same time, the drum 2 drives the sample to rotate at a speed of 60 r / min for 2 minutes to adsorb the pollen; next, the drum 2 drives the sample to rotate at a speed of 1000 r / min for 1 minute, and the centrifugal force removes the accumulated pollen; next, when using tweezers to remove the sample, try to avoid knocking off the pollen as much as possible, and take a magnified sample photo with an electron microscope; next, cut 2 more samples and operate in the same way, and use the evaluation criteria to determine the average grade of the pollen attachment situation of the 3 samples. The result of difficult attachment: 1 - 2 levels.

[0042] Easy detachment detection: Install the sample with pollen on the sample holder 9, ensure that the front of the sample faces downwards, and make it fall freely from a height of 20 cm in a horizontal state by its own weight, and repeat this operation 5 times; next, cut 2 more samples and operate in the same way, and use the evaluation criteria table 1 to determine the average grade of the pollen detachment situation of the 3 samples as the result of easy detachment: 2 - 3 levels.

[0043] Detection Test 2

[0044] Select the all-polyamide woven outer fabric as the textile sample.

[0045] Difficult adhesion detection: Adjust the humidity of the sample for more than 4 hours under standard conditions, cut a 100mm×100mm sample, and fix it on the roller 2; Next, place 0.06g of pollen on the sieve, start the vibration of the sieve to make the pollen fall evenly and freely. At the same time, the roller 2 drives the sample to rotate at a speed of 60r / min for 2min to adsorb the pollen; Next, the roller 2 drives the sample to rotate at a speed of 1000r / min for 1min, and the centrifugal force removes the accumulated pollen; Next, when using tweezers to remove the sample, try to avoid knocking off the pollen as much as possible, and take a magnified photo of the sample with an electron microscope; Next, cut another 2 samples and perform the same operation, and use the evaluation criteria to judge the average grade of the pollen adhesion of the 3 samples. The result of difficult adhesion: Grade 2.

[0046] Easy detachment detection: Install the sample with pollen attached on the sample holder 9, ensure that the front of the sample faces down, and let it fall freely from a height of 20cm in a horizontal state by its own weight, and repeat this operation 5 times; Next, cut another 2 samples and perform the same operation, and use the evaluation criteria table 1 to judge the average grade of the pollen detachment of the 3 samples. As the result of easy detachment: Grade 4.

[0047] Detection test 3

[0048] Select the fully polyester woven outer fabric as the textile sample.

[0049] Difficult adhesion detection: Adjust the humidity of the sample for more than 4 hours under standard conditions, cut a 100mm×100mm sample, and fix it on the roller 2; Next, place 0.06g of pollen on the sieve, start the vibration of the sieve to make the pollen fall evenly and freely. At the same time, the roller 2 drives the sample to rotate at a speed of 60r / min for 2min to adsorb the pollen; Next, the roller 2 drives the sample to rotate at a speed of 1000r / min for 1min, and the centrifugal force removes the accumulated pollen; Next, when using tweezers to remove the sample, try to avoid knocking off the pollen as much as possible, and take a magnified photo of the sample with an electron microscope; Next, cut another 2 samples and perform the same operation, and use the evaluation criteria to judge the average grade of the pollen adhesion of the 3 samples. The result of difficult adhesion: Grade 3.

[0050] Easy detachment detection: Install the sample with pollen attached on the sample holder 9, ensure that the front of the sample faces down, and let it fall freely from a height of 20cm in a horizontal state by its own weight, and repeat this operation 5 times; Next, cut another 2 samples and perform the same operation, and use the evaluation criteria table 1 to judge the average grade of the pollen detachment of the 3 samples. As the result of easy detachment: Grade 4-5.

[0051] The time for adsorbing pollen in the above 3 detection tests is 2 minutes. Although the time range for adsorbing pollen is 1 - 10 minutes, that is to say, the time can be greater than 2 minutes. The extension of the time for adsorbing pollen will cause pollen to stack layer by layer on the sample, but the force between pollen layers is much smaller than the adsorption force between pollen and the sample. Therefore, extending the adsorption time will not affect the test results. The time for centrifuging pollen in the above 3 detection tests is 1 minute, and the rotation speed of roller 2 is 1000 r / min. Although the time range for centrifuging pollen is 1 - 3 minutes, the centrifugal force is between the forces between pollen layers, which is much smaller than the adsorption force between pollen and the sample. The amount of pollen on the sample remains constant after 1 minute. Therefore, the final amount of pollen on the sample can be used as the result of difficult adhesion.

[0052] It should be noted that for the present invention that has been fully described, there can also be various transformation and modification implementation schemes, and it is not limited to the specific embodiments of the above implementation manners. The above embodiments are only illustrative of the present invention, rather than limiting the present invention. In short, the protection scope of the present invention should include those transformations, substitutions, and modifications that are obvious to those of ordinary skill in the art, and shall be subject to the appended claims.

Claims

1. A detection method for the pollen adsorption index on the surface of textiles, using a detection device composed of a pollen chamber, a gravity impact pollen removal device, and an electron microscope. In the pollen chamber, a vibrating screen and a roller are arranged vertically. The vibrating screen and the roller are both horizontally placed and driven by motors respectively. Fabric fixing parts are arranged along the circumference of the roller; the gravity impact pollen removal device includes a sample bracket, a sample rack, and an electromagnetic relay. The sample bracket is located at a certain height and its position is fixed or in free fall controlled by the electromagnetic relay. The sample rack is installed on the sample bracket. The gravity impact pollen removal device includes a rectangular box body. Vertical lead screws are respectively arranged at the four corners inside the box body. Two sample brackets are respectively arranged on the two lead screws on one side and the two lead screws on the other side. An electromagnetic relay is arranged on one of the sample brackets on one side. The sample brackets on both sides are connected by a connecting rod. The sample brackets on both sides fix the sample rack by magnetic adsorption. An impact counter is arranged at the bottom of the box body. A height scale is arranged on the box body. It is characterized in that: It includes difficult adsorption detection and easy detachment detection; the difficult adsorption detection includes: conditioning the sample before detection, fixing the sample on a drum, taking pollen and spreading it on a vibrating sieve mesh directly above the drum, starting the vibration of the sieve mesh to make the pollen fall evenly and freely, at the same time, the drum drives the sample to rotate at a lower speed for 1 - 10 minutes to adsorb the pollen: then the drum drives the sample to rotate at a higher speed for 1 - 3 minutes, and the centrifugal force removes the accumulated pollen, taking down the sample and using an electron microscope to take magnified photos of the sample, and using the evaluation criteria to judge the pollen attachment situation of the sample as the result of difficult attachment; the easy detachment detection includes: installing the above-mentioned sample with pollen on a sample holder, ensuring that the front of the sample faces downwards, and making it fall freely from a height of 5 - 50 cm in a horizontal state by its own weight, taking down the sample and using an electron microscope to take magnified photos of the sample, and using the evaluation criteria to judge the pollen attachment situation of the sample as the result of easy detachment.

2. The detection method of the pollen adsorption index on the surface of textiles according to claim 1, wherein In the difficult adsorption detection, the pollen falls evenly and freely after vibrating on the sieve mesh and is distributed in a square area with a side length of 10 - 75 cm below the sieve mesh.

3. The detection method for the pollen adsorption index on the surface of textiles according to claim 1 or 2, characterized in that, In the difficult adsorption detection, the sample before detection is cut into a square with a side length of 10 - 15 cm.

Images