Non-woven fabric production quality detector and use method thereof

Abstract

The invention relates to the technical field of cloth detection, in particular to a non-woven fabric production quality detector and a use method thereof. A non-woven fabric production quality detector comprises a testing machine, a rotating assembly, a testing cup, a fixing cover, a rubber sealing ring, a cup cover, a containing cup and the like. A rotating assembly is arranged on the testing machine; a test cup for placing a non-woven fabric is placed on the rotating assembly; the upper side of the test cup is in threaded connection with a fixing cover for fixing the non-woven fabric; the test cup is connected with a rubber sealing ring; the rubber sealing ring is positioned below the fixed cover; the test cup is connected with a cup cover for isolating the non-woven fabric from the outside; and a containing cup is rotationally connected in the testing cup. The non-woven fabric is driven to be in an inclined state during testing through the testing cup, a water film is separated from the non-woven fabric in cooperation with centrifugal force generated when the rotating disc rotates, pores in the non-woven fabric are prevented from being blocked by the water film, it is guaranteed that the measured moisture permeability is close to a true value, and the accuracy of water vapor permeability testing data is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric detection, and particularly to a non-woven fabric production quality detector and a using method thereof. Background Art

[0002] A cup-type moisture permeability tester is a special testing device for measuring the water vapor transmission rate of sheet materials such as material films and non-woven fabrics. Its core principle is based on the desiccant powder weight gain method. By measuring that water vapor permeates through a specimen and is absorbed by the desiccant powder under specific conditions, by regularly weighing the test cup, and calculating the water vapor transmission amount per unit time and unit area through the moisture absorption weight gain of the desiccant powder, to evaluate the moisture permeability of the material. When performing a moisture permeability test on a hydrophilic non-woven fabric, since the fiber surface contains a large number of hydrophilic groups (such as the hydroxyl group of cotton fiber, the carboxyl group of viscose fiber, or the polar group of polypropylene fiber modified by hydrophilic modification), water vapor molecules will preferentially adsorb and condense on the fiber surface. As the test time prolongs, this adsorption effect will gradually form a continuous water film covering layer between the fibers. The formation of this water film will block the microscopic pore structure of the non-woven fabric, resulting in a reduction in the effective air permeability channel area, causing the water vapor diffusion path to be blocked, and ultimately resulting in the apparent moisture permeability rate measured by the instrument being lower than the true moisture permeability performance of the material.

[0003] Furthermore, in order to improve the stability and repeatability of test data, the cup-type moisture permeability tester will keep the test cup rotating at a constant speed of 15 rpm during the test. Although this dynamic test design can promote the full contact between the non-woven fabric and water vapor, under the action of centrifugal force, the desiccant powder in the test cup will gather on one side of the cup wall, resulting in uneven distribution of the desiccant powder, a reduction in the effective moisture absorption area, and the inability of water vapor to fully contact with all the desiccant powder after permeating through the non-woven fabric. These factors comprehensively lead to a decrease in the overall moisture absorption efficiency of the desiccant powder, and may further affect the accuracy of the test results. Summary of the Invention

[0004] In order to overcome the defect that when using an existing cup-type moisture permeability tester to perform a moisture permeability test on a hydrophilic non-woven fabric, the hydrophilic groups on the fiber surface will adsorb water vapor to form a water film, blocking the pores and resulting in a reduction in the effective air permeability area, making the measured moisture permeability rate lower than the true value, the present invention provides a non-woven fabric production quality detector and a using method thereof.

[0005] The technical implementation solution of the present invention is: a non-woven fabric production quality detector, which includes a testing machine, a temperature and humidity sensor, and a pressure sensor; a machine cover is rotatably connected to the testing machine; a testing chamber is arranged on the testing machine; a temperature and humidity sensor is arranged in the testing chamber; a pressure sensor is arranged in the testing chamber; a ventilation pipe is arranged on the testing machine; the ventilation pipe is connected to an external water vapor supply device; a drain pipe is arranged on the testing machine; the ventilation pipe and the drain pipe are respectively communicated with the upper part and the bottom of the testing chamber; it further includes a rotating assembly, a testing cup, a fixing cover, a rubber sealing ring, a cup cover, and a loading cup; a rotating assembly for driving the non-woven fabric to rotate and test is arranged on the testing machine; a testing cup for placing the non-woven fabric is placed on the rotating assembly; a fixing cover for fixing the non-woven fabric is connected to the upper side of the testing cup by threads; a rubber sealing ring is connected to the testing cup; the rubber sealing ring is located below the fixing cover; a cup cover for isolating the non-woven fabric from the outside is connected to the testing cup; a loading cup for loading desiccant powder is rotatably connected in the testing cup; the loading cup is arranged in a spherical shape.

[0006] Optionally, the rotating assembly includes a motor and a turntable; a motor is fixedly connected in the testing chamber; a turntable for carrying the testing cup is fixedly connected to the output end of the motor; the turntable is arranged in a frustum shape; a number of limiting openings are formed on the turntable.

[0007] Optionally, the lower side of the machine cover is arranged in an inverted conical shape.

[0008] Optionally, the upper side of the fixing cover is arranged in an inclined shape, and the inclined direction gradually decreases from the outside of the fixing cover to the middle.

[0009] Optionally, a groove is formed on the upper side of the testing cup; a protrusion for fitting with the groove is arranged on the lower side of the rubber sealing ring.

[0010] Optionally, it further includes a vibration assembly, and the vibration assembly includes a first elastic member and a supporting plate; a number of first elastic members are fixedly connected in the testing chamber; a supporting plate is fixedly connected to the upper sides of all the first elastic members; a number of convex blocks for vibrating the testing cup are arranged on the upper side of the supporting plate; the bottom of the testing cup is arranged in a semi-spherical shape.

[0011] Optionally, it further includes a supporting assembly, and the supporting assembly includes a magnetic rod, a supporting ring, and a second elastic member; a number of movable cavities are formed on the testing cup; a magnetic rod is slidably connected in each movable cavity; a magnetic attracting piece magnetically repulsive to the magnetic rod is arranged on the lower side of the fixing cover; a second elastic member is fixedly connected to the lower side of each magnetic rod; each second elastic member is fixedly connected to the bottom of the corresponding movable cavity; a supporting ring for supporting the non-woven fabric is fixedly connected to all the magnetic rods together.

[0012] Optionally, the contact surfaces between the inner wall of the testing cup and the outer wall of the loading cup are all smooth surfaces.

[0013] Optionally, it further includes a first magnetic attraction ring and a second magnetic attraction ring; the first magnetic attraction ring is fixedly connected to the test cup; the second magnetic attraction ring for preventing the cup cover from shifting is fixedly connected to the lower side of the cup cover; the second magnetic attraction ring is directly above the first magnetic attraction ring.

[0014] A method for using a non-woven fabric production quality detector includes the following steps: Step 1: Specimen preparation, put the desiccant into the loading cup, fix the non-woven fabric on the test cup and seal it, and record the initial weight; Step 2: Test setting, tilt the specimen into the test chamber, introduce water vapor and start environmental monitoring; Step 3: Execute the test, start the turntable to rotate, make the desiccant evenly distributed and prevent caking, and at the same time discharge the water film; Step 4: Data analysis, weigh after the test to calculate the weight gain value, and obtain the transmittance in combination with the sensor data; Step 5: Equipment reset, clean the test cup and discharge the condensed water, and reset the support assembly to prepare for the next test.

[0015] Advantages of the present invention: The present invention realizes that when testing, the test cup drives the non-woven fabric to be in an inclined state, and the centrifugal force during the rotation of the turntable separates the water film from the non-woven fabric, preventing the water film from blocking the pores on the non-woven fabric, ensuring that the measured moisture permeability is close to the true value, and guaranteeing the accuracy of the water vapor transmittance test data; Through the desiccant powder accumulated inside the loading cup, the center of gravity of the loading cup is always located at the bottom of the loading cup, so that the loading cup can adaptively rotate inside the test cup, avoiding the desiccant powder in the loading cup from being unevenly gathered on one side of the bottom of the loading cup due to the centrifugal force generated by the rotation of the turntable, preventing the desiccant powder from accumulating and causing the height to rise and being thrown out from the cup mouth of the loading cup and contacting the lower side of the non-woven fabric, and avoiding the desiccant powder from absorbing moisture and blocking the pores on the surface of the non-woven fabric, ultimately ensuring the accuracy of the water vapor transmittance test data; By supporting the lower side of the non-woven fabric through the support ring, it is ensured that the fixed non-woven fabric remains flat, preventing local collapse of the non-woven fabric, avoiding water accumulation at the collapsed part during subsequent testing and hindering the normal permeation of water vapor, and guaranteeing the accuracy of the detection result; By making the bottom of the test cup contact the convex block on the upper side of the supporting plate, the test cup drives the desiccant powder in the loading cup to vibrate together, causing the desiccant powder to turn over in the loading cup, preventing the desiccant powder from agglomerating and resulting in a decrease in the moisture absorption rate, and avoiding misjudging the moisture permeability of the non-woven fabric. Description of the drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the non-woven fabric production quality detector of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the combination of the testing machine, the fixed cover, the cup cover, the turntable and the supporting plate of the present invention; Figure 3 Schematic diagram of the combined three-dimensional structure of the test cup, fixed cover, cup cover, rotating assembly and vibrating assembly of the present invention; Figure 4 Schematic diagram of the combined three-dimensional structure of the test cup, fixed cover, cup cover and magnetic attraction ring II of the present invention; Figure 5 Schematic diagram of the combined three-dimensional structure of the test cup, fixed cover, rubber sealing ring, containing cup and support assembly of the present invention; Figure 6 Combined sectional view of the test cup, fixed cover, rubber sealing ring and containing cup of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of area A in Figure 8 Test state diagram of horizontal rotation of the test cup and the containing cup of the present invention; Figure 9 Diagram of the inclined placement state of the test cup and the containing cup of the present invention; Figure 10 Test state diagram of inclined rotation of the test cup and the containing cup of the present invention.

[0017] Explanation of reference numerals: 1 - testing machine, 1001 - machine cover, 1002 - testing cavity, 1003 - ventilation pipe, 1004 - drain pipe, 2 - temperature and humidity sensor, 3 - pressure sensor, 4 - test cup, 4001 - movable cavity, 4002 - groove, 5 - fixed cover, 6 - rubber sealing ring, 7 - cup cover, 8 - containing cup, 9 - desiccant powder, 101 - motor, 102 - turntable, 10201 - limiting port, 201 - first elastic member, 202 - supporting plate, 20201 - convex block, 301 - magnetic rod, 302 - supporting ring, 303 - second elastic member, 401 - first magnetic attraction ring, 402 - second magnetic attraction ring. Detailed implementation manners

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0019] Embodiment 1: As Figures 1 - 10 shown, a non-woven fabric production quality detector includes a testing machine 1, a temperature and humidity sensor 2 and a pressure sensor 3; the machine cover 1001 is rotatably connected to the testing machine 1; the testing cavity 1002 is provided on the testing machine 1; the temperature and humidity sensor 2 is provided in the testing cavity 1002; the pressure sensor 3 is provided in the testing cavity 1002; the ventilation pipe 1003 is provided on the testing machine 1; the ventilation pipe 1003 is connected to an external water vapor supply device; the drain pipe 1004 is provided on the testing machine 1; the ventilation pipe 1003 and the drain pipe 1004 are respectively communicated with the upper part and the bottom of the testing cavity 1002; It also includes a rotating component, a test cup 4, a fixing cover 5, a rubber sealing ring 6, a cup cover 7 and a containing cup 8; a rotating component is arranged on the testing machine 1; the test cup 4 is placed on the rotating component; the fixing cover 5 is connected to the upper side of the test cup 4 by threads; the rubber sealing ring 6 is detachably connected to the test cup 4; the rubber sealing ring 6 is located under the fixing cover 5; the cup cover 7 is detachably connected to the test cup 4; the containing cup 8 is rotatably connected inside the test cup 4; the containing cup 8 is arranged in a spherical shape.

[0020] The rotating component includes a motor 101 and a turntable 102; the motor 101 is fixedly connected inside the test cavity 1002; the output end of the motor 101 is fixedly connected with the turntable 102; the turntable 102 is arranged in a frustum shape; a number of limiting ports 10201 are arranged in an annular array on the turntable 102.

[0021] The lower side of the machine cover 1001 is arranged in an inverted conical shape, which is beneficial to guiding the water droplets condensed on the lower side of the machine cover 1001 towards the middle of the turntable 102, preventing the water droplets on the lower side of the machine cover 1001 from dripping on the non-woven fabric and avoiding affecting the test effect.

[0022] The upper side of the fixing cover 5 is arranged in an inclined shape, and the inclined direction gradually decreases from the outside to the middle of the fixing cover 5, which is beneficial to making the water accumulated on the non-woven fabric flow towards the outside of the turntable 102, preventing the water from accumulating between the upper side of the non-woven fabric and the included angle formed by the fixing cover 5 and avoiding affecting the test effect.

[0023] A groove 4002 is opened on the upper side of the test cup 4; a protrusion that fits with the groove 4002 is arranged on the lower side of the rubber sealing ring 6.

[0024] It also includes a vibration component, and the vibration component includes a first elastic member 201 and a supporting plate 202; a number of first elastic members 201 arranged in an annular array are fixedly connected inside the test cavity 1002, and the first elastic member 201 is a spring; a supporting plate 202 is fixedly connected to the upper sides of all the first elastic members 201; a number of bumps 20201 are arranged in an annular array on the upper side of the supporting plate 202; the bottom of the test cup 4 is arranged in a semi-spherical shape.

[0025] It also includes a supporting component, and the supporting component includes a magnetic rod 301, a supporting ring 302 and a second elastic member 303; a number of movable cavities 4001 are opened on the test cup 4 in an annular array; a magnetic rod 301 is slidably connected inside each movable cavity 4001; a magnetic attraction piece that is magnetically repulsive to the magnetic rod 301 is arranged on the lower side of the fixing cover 5; a second elastic member 303 is fixedly connected to the lower side of each magnetic rod 301, and the second elastic member 303 is a spring; each second elastic member 303 is fixedly connected to the bottom of the corresponding movable cavity 4001; a supporting ring 302 is fixedly connected to all the magnetic rods 301.

[0026] The contact surfaces between the inner wall of the test cup 4 and the outer wall of the receiving cup 8 are smooth surfaces, which is beneficial to reducing the friction between the inner wall of the test cup 4 and the outer wall of the receiving cup 8 and ensuring smooth rotation of the receiving cup 8 inside the inner wall of the test cup 4.

[0027] When it is necessary to test the water vapor transmission rate of the hydrophilic non-woven fabric, the staff first fills the receiving cup 8 with the desiccant powder 9 required for the test, and evenly applies a layer of sealing resin on the upper side of the cup mouth of the test cup 4. Subsequently, the pre-cut circular non-woven fabric specimen is accurately placed at the cup mouth position of the test cup 4 to ensure that the edge of the non-woven fabric is in full contact with the sealing resin and forms an effective seal. After the non-woven fabric is flat and fixed, the rubber sealing ring 6 is placed on the upper side edge of the non-woven fabric, and then the fixing cover 5 is screwed onto the test cup 4. During the screwing process, the fixing cover 5 gradually presses the rubber sealing ring 6 against the upper surface of the non-woven fabric to enhance the sealing effect. When the fixing work of the non-woven fabric is completed, the test cup 4 and the components above it, as well as the desiccant powder 9, are the specimen individuals. Before placing the test cup 4 in the testing machine 1 for detection, the staff weighs the specimen individuals and records the initial weight. During the entire weighing operation, the staff places the cup cover 7 on the upper side of the non-woven fabric to isolate the non-woven fabric from the external environment, preventing the desiccant powder 9 in the receiving cup 8 from absorbing external water vapor through the non-woven fabric and avoiding the increase in the weight of the specimen individuals before the test, thus ensuring the accuracy of the test results.

[0028] It is also considered that, due to the soft and deformable nature of the non-woven fabric material, when the non-woven fabric is placed at the cup mouth of the test cup 4, the non-woven fabric is prone to local collapse, resulting in an uneven surface of the fixed non-woven fabric. This collapse will form a water accumulation area during subsequent testing, hindering the normal transmission of water vapor and affecting the test results. Therefore, when placing the non-woven fabric, the lower side of the non-woven fabric is supported by the support ring 302 flush with the cup mouth of the test cup 4 to ensure that the fixed non-woven fabric remains flat, prevent local collapse of the non-woven fabric, avoid water accumulation at the collapsed area during subsequent testing and hinder the normal transmission of water vapor, and ensure the accuracy of the test results. At the same time, when the fixing cover 5 is screwed onto the test cup 4, the fixing cover 5 squeezes the rubber sealing ring 6 on the upper side of the cup mouth of the test cup 4, causing the protrusion on the lower side of the rubber sealing ring 6 to be embedded in the groove 4002, driving the edge of the non-woven fabric to be embedded in the groove 4002, and further flattening the non-woven fabric. During the process of screwing the fixing cover 5 tightly onto the test cup 4, the magnetic repulsion force generated by the magnetic attraction piece provided on the lower side of the fixing cover 5 and the magnetic rod 301 drives the magnetic rod 301 to move downward in the movable cavity 4001, synchronously compressing the second elastic member 303, causing the magnetic rod 301 to drive the support ring 302 to move downward and separate from the non-woven fabric, effectively avoiding the reduction of the air permeability area caused by the contact between the support ring 302 and the non-woven fabric, and preventing the water vapor condensed on the surface of the support ring 302 from forming a barrier water film with the non-woven fabric, thereby ensuring that the air permeability of the non-woven fabric during the test is not disturbed and ultimately ensuring the accuracy of the test data.

[0029] After the weighing operation is completed, the staff opens the machine cover 1001 and places multiple specimen individuals into the limiting ports 10201 on the turntable 102 respectively. Combining with Figure 3 the understanding, the limiting ports 10201 limit the outside of the test cup 4, and the test cup 4 is in an inclined state. Since the drying agent powder 9 is loaded in the receiving cup 8, when the test cup 4 is inclined, the receiving cup 8 can always maintain an upward-opening state in the test cup 4 under the action of the weight of the drying agent powder 9. Subsequently, the staff removes the cup cover 7, makes the non-woven fabric contact with the high-humidity environment in the test chamber 1002, and then closes the machine cover 1001. At this time, the external water vapor supply device is controlled to supply water vapor into the test chamber 1002 through the ventilation pipe 1003. Due to the difference in dryness and humidity between the inside of the test chamber 1002 and the inside of the test cup 4, the water vapor in the test chamber 1002 penetrates through the non-woven fabric into the test cup 4 and is absorbed by the drying agent powder 9, causing the drying agent powder 9 to gain weight. Subsequently, the motor 101 is controlled to drive the turntable 102 to rotate, so that the turntable 102 drives the test cup 4 to rotate in the test chamber 1002, making each specimen individual uniformly contact with the water vapor in the test chamber 1002, improving the stability and repeatability of the test data. During the test, due to the drying agent powder 9 accumulated inside the receiving cup 8, the center of gravity of the receiving cup 8 is always located at the bottom of the receiving cup 8. Under the influence of the centrifugal force generated by the rotation of the turntable 102 on the test cup 4, the drying agent powder 9 inside the receiving cup 8 moves towards the outside of the turntable 102, driving the receiving cup 8 to adaptively rotate inside the test cup 4 into an inclined state as Figure 8 shown, so that the upper surface of the drying agent powder 9 always remains approximately parallel to the upper end face of the cup mouth of the receiving cup 8, preventing the drying agent powder 9 in the receiving cup 8 from being unevenly gathered on one side of the bottom of the receiving cup 8 due to the centrifugal force generated by the rotation of the turntable 102, preventing the drying agent powder 9 from being piled up and rising in height and being thrown out from the cup mouth of the receiving cup 8 and contacting the lower side of the non-woven fabric, and avoiding the surface pores of the non-woven fabric from being blocked after the drying agent powder 9 absorbs moisture, ultimately ensuring the accuracy of the water vapor transmission rate test data. During the test, the temperature and humidity in the test chamber 1002 are monitored in real time through the temperature and humidity sensor 2, and at the same time, the pressure in the test chamber 1002 is monitored through the pressure sensor 3, and its value is recorded for subsequent calculation of the water vapor transmission rate of the non-woven fabric according to the test environment.

[0030] It is also considered that since the hydrophilic non-woven fabric contains hydrophilic groups such as cotton and viscose fibers, when the turntable 102 drives the test cup 4 to rotate for testing, water vapor is easily adsorbed on the fiber surface and gradually forms a water film. The water film will block the pores on the non-woven fabric, resulting in the measured moisture permeability being lower than the true value. Therefore, by setting the turntable 102 in a frustum shape, the test cup 4 is in an inclined state during testing, and thus the non-woven fabric is in an inclined state. When the water vapor forms a water film on the non-woven fabric, the water film flows downward along the inclined surface under the action of gravity. At the same time, due to the centrifugal force generated when the turntable 102 rotates, the water film is accelerated to flow towards the edge of the non-woven fabric. After the water film flows to the edge of the non-woven fabric and contacts the fixed cover 5, through the upper side of the fixed cover 5 which is set to be inclined, the water film flows towards the outside of the turntable 102, preventing moisture from accumulating between the upper side of the non-woven fabric and the included angle formed by the fixed cover 5, and avoiding affecting the test effect. In summary, the present invention separates the water film from the non-woven fabric by inclining the non-woven fabric and cooperating with the centrifugal force when the turntable 102 rotates, preventing the water film from blocking the pores on the non-woven fabric, ensuring that the measured moisture permeability is close to the true value, and guaranteeing the accuracy of the water vapor transmission rate test data. It should be noted that since the desiccant powder 9 is contained inside the loading cup 8, the center of gravity of the loading cup 8 is always located at the bottom of the loading cup 8. After the test cup 4 is placed on the turntable 102 and is in an inclined state, the loading cup 8 adaptively rotates inside the test cup 4 to be in the Figure 9 horizontal state shown, so that the upper surface of the desiccant powder 9 is always approximately parallel to the cup mouth of the loading cup 8. When the turntable 102 drives the inclined test cup 4 to rotate, the desiccant powder 9 inside the loading cup 8 drives the loading cup 8 to adaptively rotate inside the test cup 4 to be in the inclined state as shown in Figure 10 , and the upper surface of the desiccant powder 9 is always approximately parallel to the upper end surface of the cup mouth of the loading cup 8, preventing the desiccant powder 9 from being thrown out from the cup mouth of the loading cup 8, thereby ensuring that the desiccant powder 9 inside the loading cup 8 is not affected by the inclination of the test cup 4.

[0031] It is also considered that since the desiccant powder 9 has strong hygroscopicity and is prone to agglomeration after adsorbing moisture, the surface area of the desiccant powder 9 decreases after agglomeration, and the moisture absorption rate decreases, resulting in a low test value of the moisture permeability, which may lead to misjudgment of the moisture permeability of the non-woven fabric. Therefore, when the turntable 102 drives the test cup 4 to rotate for testing, the bottom of the test cup 4 contacts the convex block 20201 on the upper side of the supporting plate 202, and at the same time compresses the first elastic member 201, so that the convex block 20201 repeatedly impacts the bottom of the test cup 4, thereby vibrating the test cup 4. The test cup 4 drives the desiccant powder 9 in the containing cup 8 to vibrate together, causing the desiccant powder 9 to turn over in the containing cup 8, fully absorbing the water vapor entering the test cup 4, preventing the desiccant powder 9 from reducing the moisture absorption rate due to agglomeration, and avoiding misjudgment of the moisture permeability of the non-woven fabric. While the test cup 4 drives the containing cup 8 to vibrate, the test cup 4 drives the non-woven fabric to vibrate together, accelerating the flow of the water film on the non-woven fabric through vibration and enhancing the separation effect of the water film on the non-woven fabric.

[0032] When the test is completed, the operator opens the machine cover 1001, takes out the test cup 4 from the turntable 102, places the test cup 4 in a constant temperature and humidity laboratory environment and leaves it standing for ten minutes to balance the temperature of the test cup 4 with the environment. Then, the whole sample is weighed and compared with the initial weight to judge the water vapor transmission rate of the non-woven fabric. After the weighing analysis is completed, the operator removes the fixed cover 5 from the test cup 4. During this process, the magnetic rod 301 loses the repulsive force of the magnetic sheet on the fixed cover 5, and drives the support ring 302 to rise and reset under the elastic force of the second elastic member 303. Then, the rubber sealing ring 6 and the non-woven fabric are removed in sequence to prepare for the next test work.

[0033] Embodiment 2: On the basis of Embodiment 1, as Figures 4 - 7 shown, it further includes a first magnetic attraction ring 401 and a second magnetic attraction ring 402; the first magnetic attraction ring 401 is fixedly connected to the test cup 4; the second magnetic attraction ring 402 is fixedly connected to the lower side of the cup cover 7; the second magnetic attraction ring 402 is located directly above the first magnetic attraction ring 401.

[0034] It is also considered that in the prior art, the sealing resin is first applied to the test cup 4, and then the non-woven fabric is placed on the test cup 4 in contact with the sealing resin. Since the fabric is placed manually, the non-woven fabric may be placed askew. When the staff adjusts the placement position of the non-woven fabric, the lower side of the detection area of the non-woven fabric is easily adhered to the sealing resin. During subsequent tests, the area covered by the sealing resin is blocked by the air permeation channel, resulting in this part being unable to participate in the normal air permeation process, thus affecting the accuracy of the water vapor transmission rate detection value. Therefore, before the staff applies the sealing resin, the staff first places the non-woven fabric on the test cup 4 so that the non-woven fabric is carried by the support ring 302, and at the same time, the lower side of the non-woven fabric is in contact with the first magnetic ring 401. After the non-woven fabric is placed, the staff drives the second magnetic ring 402 on the cup cover 7 and places it on the non-woven fabric. Through the magnetic adsorption of the first magnetic ring 401 and the second magnetic ring 402, the non-woven fabric is fixed. Subsequently, the staff applies the sealing resin to the upper side of the non-woven fabric. When the fixing cover 5 is subsequently tightened, the rubber sealing ring 6 is squeezed by the fixing cover 5, so that the rubber sealing ring 6 squeezes the sealing resin on the upper side of the non-woven fabric through the non-woven fabric, thereby ensuring the sealing effect of the sealing resin on the edge of the non-woven fabric. In summary, the present invention fixes the placed non-woven fabric through the first magnetic ring 401 and the second magnetic ring 402, and then the staff applies the sealing resin to prevent the lower side of the detection area of the non-woven fabric from adhering to the sealing resin when the non-woven fabric is placed askew and adjusted, and avoids the area covered by the sealing resin during the test from being blocked by the air permeation channel, ensuring the accuracy of the water vapor transmission rate detection value of the non-woven fabric.

[0035] A method for using a non-woven fabric production quality detector includes the following steps: Step 1: Specimen preparation, loading the desiccant into the loading cup 8, fixing and sealing the non-woven fabric on the test cup 4, and recording the initial weight; Step 2: Test setting, tilting the specimen into the test chamber 1002, introducing water vapor and starting environmental monitoring; Step 3: Performing the test, starting the rotation of the turntable 102 to evenly distribute the desiccant and prevent caking, and at the same time discharging the water film; Step 4: Data analysis, weighing and calculating the weight gain value after the test, and obtaining the transmission rate in combination with the sensor data; Step 5: Equipment reset, cleaning the test cup and discharging the condensed water, and resetting the support assembly to prepare for the next test.

[0036] The above embodiments are only the preferred embodiments of the present invention and are not used to limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A non-woven fabric production quality detector, comprising a testing machine (1), a temperature and humidity sensor (2) and a pressure sensor (3); the testing machine (1) is rotatably connected to a cover (1001); the testing machine (1) is provided with a testing chamber (1002); the testing chamber (1002) is provided with a temperature and humidity sensor (2); the testing chamber (1002) is provided with a pressure sensor (3); the testing machine (1) is provided with a ventilation pipe (1003); the ventilation pipe (1003) is connected to an external water vapor supply device; the testing machine (1) is provided with a drainage pipe (1004); the ventilation pipe (1003) and the drainage pipe (1004) are respectively connected to the upper part and the bottom part of the testing chamber (1002); the characteristics are: The invention also comprises a rotating assembly, a test cup (4), a fixed cover (5), a rubber sealing ring (6), a cup cover (7) and a containing cup (8); the testing machine (1) is provided with a rotating assembly for driving the non-woven fabric to rotate for testing; the test cup (4) for containing the non-woven fabric is placed on the rotating assembly; the upper side of the test cup (4) is connected to a fixed cover (5) for fixing the non-woven fabric via a thread; the test cup (4) is connected to a rubber sealing ring (6); the rubber sealing ring (6) is located on the lower side of the fixed cover (5); the test cup (4) is connected to a cup cover (7) for isolating the non-woven fabric from the outside; the test cup (4) is rotatably connected to a containing cup (8) for containing desiccant powder (9); the containing cup (8) is arranged in a spherical shape.

2. A nonwoven fabric production quality detector according to claim 1, characterized in that: The rotating assembly comprises a motor (101) and a rotating disk (102); the motor (101) is fixedly connected in the test cavity (1002); the output end of the motor (101) is fixedly connected to the rotating disk (102) for carrying the test cup (4); the rotating disk (102) is arranged in a frustum shape; and a plurality of limit openings (10201) are provided on the rotating disk (102).

3. A nonwoven fabric production quality detector according to claim 1, characterized in that: The lower side of the machine cover (1001) is configured to be in an inverted cone shape.

4. A nonwoven fabric production quality detector according to claim 1, characterized in that: The upper side of the fixed cover (5) is arranged in an inclined shape, and the inclination direction gradually decreases from the outer side to the middle of the fixed cover (5).

5. A nonwoven fabric production quality detector according to claim 2, characterized in that: A groove (4002) is provided on the upper side of the test cup (4); and a protrusion that engages with the groove (4002) is provided on the lower side of the rubber sealing ring (6).

6. A nonwoven fabric production quality detector according to claim 5, characterized in that: The invention also comprises a vibration component, which comprises an elastic member 1 (201) and a supporting plate (202); a plurality of elastic members 1 (201) are fixedly connected in the test cavity (1002); a supporting plate (202) is commonly fixedly connected on the upper sides of all the elastic members 1 (201); a plurality of protrusions (2201) for vibrating the test cup (4) are arranged on the upper side of the supporting plate (202); and the bottom of the test cup (4) is arranged in a semi-spherical shape.

7. A nonwoven fabric production quality detector according to claim 6, characterized in that: The invention also comprises a support assembly, which comprises a magnetic rod (301), a support ring (302) and a second elastic member (303); a plurality of movable cavities (4001) are provided on the test cup (4); a magnetic rod (301) is slidably connected in each movable cavity (4001); a magnetic attraction sheet which is magnetically repelled from the magnetic rod (301) is arranged on the lower side of the fixed cover (5); a second elastic member (303) is fixedly connected to the lower side of each magnetic rod (301); each second elastic member (303) is fixedly connected to the bottom of the corresponding movable cavity (4001); and a support ring (302) for supporting non-woven fabric is fixedly connected to all the magnetic rods (301).

8. A nonwoven fabric production quality detector according to claim 7, characterized in that: The contact surfaces of the inner wall of the test cup (4) and the outer wall of the containing cup (8) are both smooth surfaces.

9. A nonwoven fabric production quality detector according to claim 8, characterized in that: It also includes a magnetic attraction ring 1 (401) and a magnetic attraction ring 2 (402); the magnetic attraction ring 1 (401) is fixedly connected to the test cup (4); the magnetic attraction ring 2 (402) is fixedly connected to the lower side of the cup cover (7) for preventing the cup cover (7) from deflecting; the magnetic attraction ring 2 (402) is located directly above the magnetic attraction ring 1 (401).

10. A method for using a nonwoven fabric production quality detector, characterized in that: The method uses a nonwoven fabric production quality detector as claimed in claim 9, comprising the following steps: Step 1: Sample preparation: put the desiccant into the holding cup (8), fix the non-woven fabric on the test cup (4) and seal it, and record the initial weight; Step 2: Test setup, place the sample in the test chamber (1002) at an angle, introduce water vapor and start environmental monitoring; Step 3: Execute the test, start the turntable (102) to rotate, so that the desiccant is evenly distributed and agglomeration is prevented, and the water film is discharged at the same time; Step 4: Data analysis: weigh and calculate the weight gain after the test, and combine the sensor data to get the transmittance; Step 5: Reset the equipment, clean the test cup and drain the condensed water, reset the support assembly and prepare for the next test.

Images