A non-woven fabric production quality detector and its use method

Abstract

The present invention relates to the field of fabric detection technology, and in particular to a non-woven fabric production quality detector and its use method. A non-woven fabric production quality detector includes a testing machine, a rotating assembly, a test cup, a fixed cover, a rubber sealing ring, a cup cover and a holding cup, etc.; the testing machine is provided with a rotating assembly; a test cup for placing non-woven fabric is placed on the rotating assembly; a fixed cover for fixing the non-woven fabric is connected to the upper side of the test cup through a thread; a rubber sealing ring is connected to the test cup; the rubber sealing ring is located on the lower side of the fixed cover; a cup cover for isolating the non-woven fabric from the outside is connected to the test cup; and a holding cup is rotatably connected inside the test cup. The present invention realizes that the test cup drives the non-woven fabric to an inclined state during testing, and the centrifugal force when the turntable rotates separates the water film from the non-woven fabric, preventing the water film from clogging the pores on the non-woven fabric, ensuring that the measured water vapor permeability is close to the true value, and guaranteeing the accuracy of the water vapor permeability test data.

Description

Technical Field

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

[0002] The cup-type water vapor permeability tester is a specialized test device used to determine the water vapor transmission rate of sheet materials such as films and non-woven fabrics. Its core principle is based on the desiccant powder weight gain method. Under specific conditions, water vapor is absorbed by the desiccant powder as it passes through the sample. The test cup is periodically weighed, and the water vapor transmission rate per unit time and unit area is calculated based on the desiccant powder moisture absorption weight gain to evaluate the material's moisture permeability. When testing the moisture permeability of hydrophilic non-woven fabrics, due to the large number of hydrophilic groups on the fiber surface (such as hydroxyl groups on cotton fibers, carboxyl groups on viscose fibers, or polar groups on hydrophilically modified polypropylene fibers), water vapor molecules preferentially adsorb and condense on the fiber surface. As the test time increases, this adsorption leads to the gradual formation of a continuous water film between the fibers. This water film formation clogs the microscopic pore structure of the non-woven fabric, reducing the effective air permeability area and obstructing the water vapor diffusion path. Ultimately, the apparent water vapor permeability rate measured by the instrument is lower than the material's actual moisture permeability performance.

[0003] Furthermore, to improve the stability and repeatability of test data, the cup-type moisture permeability tester rotates the test cup at a constant speed of 15 rpm during the test. Although this dynamic test design promotes sufficient contact between the non-woven fabric and water vapor, the desiccant powder in the test cup tends to aggregate toward one side of the cup wall under the action of centrifugal force, resulting in uneven distribution of the desiccant powder and a reduced effective moisture absorption area. After water vapor passes through the non-woven fabric, it is unable to fully contact all of the desiccant powder. These factors combined lead to a decrease in the overall moisture absorption efficiency of the desiccant powder, which may affect the accuracy of the test results. Summary of the Invention

[0004] In order to overcome the disadvantage that when using existing cup-type moisture permeability testers to test hydrophilic non-woven fabrics, the hydrophilic groups on the fiber surface will adsorb water vapor to form a water film, blocking the pores and reducing the effective breathable area, causing the measured moisture permeability to be lower than the actual value, the present invention provides a non-woven fabric production quality detector and a method for using the same.

[0005] The technical implementation scheme of the present invention is: a non-woven fabric production quality detector, including a testing machine, a temperature and humidity sensor and a pressure sensor; the testing machine is rotatably connected to a cover; a testing chamber is provided on the testing machine; a temperature and humidity sensor is provided in the testing chamber; a pressure sensor is provided in the testing chamber; a ventilation pipe is provided on the testing machine; the ventilation pipe is connected to an external water vapor supply device; the testing machine is provided with a drain pipe; the ventilation pipe and the drain pipe are connected to the upper and bottom of the testing chamber respectively; it also includes a rotating component, a test cup, a fixed cover, a rubber sealing ring, a cup cover and a holding cup; the testing machine is provided with a rotating component for driving the non-woven fabric to rotate for testing; a test cup for placing the non-woven fabric is placed on the rotating component; a fixed cover for fixing the non-woven fabric is threadedly connected to the upper side of the test cup; a rubber sealing ring is connected to the test cup; the rubber sealing ring is located on the lower side of the fixed cover; a cup cover for isolating the non-woven fabric from the outside world is connected to the test cup; a holding cup for holding desiccant powder is rotatably connected in the test cup; the holding cup is configured to be spherical.

[0006] Optionally, the rotating assembly includes a motor and a turntable; the motor is fixedly connected to the test cavity; the turntable for carrying the test cup is fixedly connected to the output end of the motor; the turntable is arranged in a frustum shape; and a plurality of limit openings are opened on the turntable.

[0007] Optionally, the lower side of the cover is configured to be in an inverted cone shape.

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

[0009] Optionally, a groove is provided on the upper side of the test cup; and a protrusion is provided on the lower side of the rubber sealing ring to engage with the groove.

[0010] Optionally, a vibration component is also included, which includes an elastic part and a support plate; several elastic parts are fixed in the test cavity; a support plate is fixed on the upper side of all elastic parts; several protrusions are provided on the upper side of the support plate for making the test cup vibrate; and the bottom of the test cup is set in a semi-spherical shape.

[0011] Optionally, a support assembly is also included, which includes a magnetic rod, a support ring and an elastic part 2; a plurality of movable cavities are opened on the test cup; a magnetic rod is slidably connected to each movable cavity; a magnetic attraction sheet that magnetically repels the magnetic rod is provided on the lower side of the fixed cover; an elastic part 2 is fixedly connected to the lower side of each magnetic rod; each elastic part 2 is fixedly connected to the bottom of the corresponding movable cavity; a support ring for supporting the non-woven fabric is fixedly connected to all the magnetic rods.

[0012] Optionally, the contact surfaces of the inner wall of the test cup and the outer wall of the containing cup are both smooth surfaces.

[0013] Optionally, it further includes a magnetic ring 1 and a magnetic ring 2; the magnetic ring 1 is fixed to the test cup; the magnetic ring 2 is fixed to the underside of the cup cover to prevent the cup cover from shifting; the magnetic ring 2 is located directly above the magnetic ring 1.

[0014] A method for using a non-woven fabric production quality detector comprises the following steps:

[0015] Step 1: Prepare the sample. Place the desiccant into the container, fix the non-woven fabric on the test cup and seal it. Record the initial weight.

[0016] Step 2: Test setup: Place the sample in the test chamber at an angle, introduce water vapor, and start environmental monitoring;

[0017] Step 3: Execute the test and start the turntable to evenly distribute the desiccant and prevent agglomeration while draining the water film.

[0018] Step 4: Data analysis: After the test, weigh and calculate the weight gain, and combine the sensor data to obtain the transmittance;

[0019] Step 5: Reset the equipment, clean the test cup and drain the condensed water, reset the support assembly and prepare for the next test.

[0020] The beneficial effects of the present invention are as follows: the present invention achieves the goal of tilting the non-woven fabric by the test cup during testing, and separating the water film from the non-woven fabric with the centrifugal force of the rotating turntable, thereby preventing the water film from clogging the pores on the non-woven fabric, ensuring that the measured water vapor permeability is close to the actual value, and guaranteeing the accuracy of the water vapor transmission rate test data;

[0021] The desiccant powder accumulated inside the holding cup ensures that the center of gravity of the holding cup is always located at the bottom of the holding cup, thereby enabling the holding cup to rotate adaptively inside the test cup. This prevents the desiccant powder in the holding cup from being concentrated on one side of the bottom of the holding cup due to the centrifugal force generated by the rotation of the turntable. This prevents the desiccant powder from accumulating and rising to a height that would cause it to be thrown out of the cup mouth and contact the lower side of the non-woven fabric. This prevents the desiccant powder from absorbing moisture and clogging the pores on the surface of the non-woven fabric, ultimately ensuring the accuracy of the water vapor transmission rate test data.

[0022] The support ring supports the bottom side of the non-woven fabric to ensure that the fixed non-woven fabric remains flat, preventing local collapse of the non-woven fabric and preventing water accumulation in the collapsed area during subsequent testing, thereby preventing the normal penetration of water vapor and ensuring the accuracy of the test results.

[0023] By making the bottom of the test cup contact the bumps on the upper side of the support plate, the test cup drives the desiccant powder in the holding cup to vibrate together, causing the desiccant powder to flip in the holding cup, preventing the desiccant powder from clumping and causing a decrease in moisture absorption rate, thereby avoiding misjudgment of the moisture permeability of the non-woven fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the non-woven fabric production quality detector of the present invention;

[0025] Figure 2 This is a schematic diagram of the combined three-dimensional structure of the testing machine, fixed cover, cup cover, turntable and supporting plate of the present invention;

[0026] Figure 3 This is a schematic diagram of the combined three-dimensional structure of the test cup, fixed cover, cup cover, rotating assembly and vibration assembly of the present invention;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the test cup, fixed cover, cup cover and magnetic ring of the present invention;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the test cup, fixed cover, rubber sealing ring, holding cup and support assembly of the present invention;

[0029] Figure 6 This is a cross-sectional view of the test cup, fixed cover, rubber sealing ring and holding cup assembly of the present invention;

[0030] Figure 7 For the present invention Figure 6 A magnified image of the area at center A;

[0031] Figure 8 This is a diagram showing the horizontal rotation test state of the test cup and the holding cup of the present invention;

[0032] Figure 9 This is a diagram of the test cup and the holding cup of the present invention in an inclined position;

[0033] Figure 10 This is a diagram of the tilting and rotating test state of the test cup and the holding cup of the present invention.

[0034] Explanation of the accompanying drawings: 1-testing machine, 1001-machine cover, 1002-testing chamber, 1003-ventilation pipe, 1004-drain pipe, 2-temperature and humidity sensor, 3-pressure sensor, 4-testing cup, 4001-movable chamber, 4002-groove, 5-fixed cover, 6-rubber sealing ring, 7-cup cover, 8-holding cup, 9-desiccant powder, 101-motor, 102-turntable, 10201-limiting mouth, 201-elastic part 1, 202-support plate, 20201-bump, 301-magnetic rod, 302-support ring, 303-elastic part 2, 401-magnetic ring 1, 402-magnetic ring 2. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1: Figures 1-10 As shown, a non-woven fabric production quality detector includes a testing machine 1, a temperature and humidity sensor 2, and a pressure sensor 3; a cover 1001 is rotatably connected to the testing machine 1; a testing chamber 1002 is provided on the testing machine 1; the temperature and humidity sensor 2 is provided in the testing chamber 1002; the pressure sensor 3 is provided in the testing chamber 1002; a vent pipe 1003 is provided on the testing machine 1; the vent pipe 1003 is connected to an external water vapor supply device; and a drain pipe 1004 is provided on the testing machine 1; the vent pipe 1003 and the drain pipe 1004 are respectively connected to the upper part and the bottom part of the testing chamber 1002;

[0037] It also includes a rotating assembly, a test cup 4, a fixed cover 5, a rubber sealing ring 6, a cup cover 7 and a receiving cup 8; the testing machine 1 is provided with a rotating assembly; the test cup 4 is placed on the rotating assembly; the fixed cover 5 is connected to the upper side of the test cup 4 by a thread; the rubber sealing ring 6 is detachably connected to the test cup 4; the rubber sealing ring 6 is located on the lower side of the fixed cover 5; the test cup 4 is detachably connected to the cup cover 7; the receiving cup 8 is rotatably connected inside the test cup 4; the receiving cup 8 is configured to be spherical.

[0038] The rotating assembly includes a motor 101 and a turntable 102; the motor 101 is fixedly connected to the test cavity 1002; the turntable 102 is fixedly connected to the output end of the motor 101; the turntable 102 is arranged in a frustum shape; and a plurality of limiting openings 10201 in a ring array are opened on the turntable 102.

[0039] The lower side of the machine cover 1001 is set to an inverted cone shape, which is conducive to guiding the water droplets condensed on the lower side of the machine cover 1001 to the middle of the turntable 102, preventing the water droplets on the lower side of the machine cover 1001 from falling on the non-woven fabric, avoiding affecting the test results.

[0040] 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, which is conducive to allowing the moisture accumulated on the non-woven fabric to flow toward the outside of the turntable 102, preventing moisture from accumulating between the angle formed by the upper side of the non-woven fabric and the fixed cover 5, and avoiding affecting the test effect.

[0041] A groove 4002 is formed on the upper side of the test cup 4 ; a protrusion that fits into the groove 4002 is provided on the lower side of the rubber sealing ring 6 .

[0042] It also includes a vibration component, which includes an elastic member 201 and a support plate 202; a plurality of elastic members 201 in a ring array are fixedly connected to the test cavity 1002, and the elastic members 201 are springs; a support plate 202 is fixedly connected to the upper side of all elastic members 201; a plurality of protrusions 20201 in a ring array are provided on the upper side of the support plate 202; the bottom of the test cup 4 is configured to be semi-spherical.

[0043] It also includes a support assembly, which includes a magnetic rod 301, a support ring 302 and an elastic member 2 303; a plurality of active cavities 4001 in a ring array are opened on the test cup 4; a magnetic rod 301 is slidably connected in each active cavity 4001; a magnetic attraction sheet that magnetically repels the magnetic rod 301 is provided on the lower side of the fixed cover 5; an elastic member 2 303 is fixed to the lower side of each magnetic rod 301, and the elastic member 2 303 is a spring; each elastic member 2 303 is fixed to the bottom of the corresponding active cavity 4001; a support ring 302 is fixed to all the magnetic rods 301.

[0044] The contact surfaces between the inner wall of the test cup 4 and the outer wall of the holding cup 8 are both smooth, which helps to reduce the friction between the inner wall of the test cup 4 and the outer wall of the holding cup 8 and ensures that the holding cup 8 rotates smoothly on the inner wall of the test cup 4.

[0045] When it is necessary to test the water vapor transmission rate of the hydrophilic non-woven fabric, the staff first fills the holding 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. Then, the pre-cut round non-woven fabric sample is accurately placed on the cup mouth 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 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 tightly. The upper surface of the non-woven fabric is fixed to enhance the sealing effect. After the fixing work of the non-woven fabric is completed, the test cup 4 and the components thereon and the desiccant powder 9 are the sample individuals. Before placing the test cup 4 in the testing machine 1 for testing, the staff weighs the sample 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 holding cup 8 from absorbing external moisture through the non-woven fabric, avoiding the weight increase of the sample individuals before the test, and ensuring the accuracy of the test results.

[0046] It is also taken into consideration that, since the non-woven fabric is soft and easily deformed, when the non-woven fabric is placed on the cup mouth of the test cup 4, the non-woven fabric is prone to partial collapse, resulting in an uneven surface of the fixed non-woven fabric. This collapse will form a water accumulation area during subsequent tests, hindering the normal penetration 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 that is flush with the cup mouth of the test cup 4 to ensure that the fixed non-woven fabric remains flat, prevent the non-woven fabric from partial collapse, and avoid water accumulation in the collapsed area during subsequent tests to hinder the normal penetration of water vapor, thereby ensuring the accuracy of the test results. At the same time, when the fixed cover 5 is screwed onto the test cup 4, the fixed cover 5 squeezes the rubber sealing ring 6 against the cup mouth of the test cup 4. On the upper side, the protrusion on the lower side of the rubber sealing ring 6 is embedded in the groove 4002, driving the edge of the non-woven fabric to be embedded in the groove 4002, further flattening the non-woven fabric. In the process of tightening the fixed cover 5 to the test cup 4, the magnetic repulsion generated by the magnetic attraction piece and the magnetic rod 301 provided on the lower side of the fixed cover 5 drives the magnetic rod 301 to move downward in the active cavity 4001, and synchronously compresses the elastic part 2 303, so that the magnetic rod 301 drives 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 at the same time 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 is not disturbed during the test, and ultimately ensuring the accuracy of the test data.

[0047] When the weighing operation is completed, the staff opens the cover 1001 and places multiple sample individuals in the limit openings 10201 on the turntable 102. Figure 3It is understood that the limiting opening 10201 is used to limit the outside of the test cup 4 and make the test cup 4 tilted. Since the holding cup 8 is loaded with desiccant powder 9, when the test cup 4 is tilted, the holding cup 8 can always keep the opening facing upward in the test cup 4 under the action of the weight of the desiccant powder 9. Then the staff removes the cup cover 7 to make 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 transport water vapor into the test chamber 1002 through the vent pipe 1003. The difference in dryness and humidity between the test chamber 1002 and the test cup 4 allows the water vapor in the test chamber 1002 to pass through the non-woven fabric. The desiccant powder 9 enters the test cup 4 and is absorbed by the desiccant powder 9, causing the desiccant powder 9 to increase in 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, so that each sample individual is evenly exposed to the water vapor in the test chamber 1002, thereby improving the stability and repeatability of the test data. During the test process, the desiccant powder 9 accumulated inside the holding cup 8 ensures that the center of gravity of the holding cup 8 is always located at the bottom of the holding cup 8. Under the influence of the centrifugal force of the rotation of the turntable 102, the desiccant powder 9 inside the holding cup 8 moves toward the outside of the turntable 102, driving the holding cup 8 to adaptively rotate inside the test cup 4 as shown in the figure. Figure 8 The inclined state shown in the figure ensures that the upper surface of the desiccant powder 9 is always approximately parallel to the upper end surface of the cup mouth of the holding cup 8, thereby preventing the desiccant powder 9 in the holding cup 8 from being concentrated on one side of the bottom of the holding cup 8 due to the centrifugal force generated by the rotation of the turntable 102, and preventing the desiccant powder 9 from accumulating and rising in height and being thrown out from the cup mouth of the holding cup 8 and contacting the lower side of the non-woven fabric, thereby preventing the desiccant powder 9 from clogging the pores on the surface of the non-woven fabric after absorbing moisture, and 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 by the temperature and humidity sensor 2, and the pressure in the test chamber 1002 is monitored by the pressure sensor 3, and its value is recorded for subsequent measurement of the water vapor transmission rate of the non-woven fabric according to the test environment.

[0048] It is also taken into consideration 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 by 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 tilted during the test, and the non-woven fabric is then tilted. When 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, the centrifugal force generated by the rotation of the turntable 102 accelerates the water film to flow toward 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, it is set to The upper side of the inclined fixed cover 5 makes the water film flow toward the outside of the turntable 102, preventing water from accumulating between the angle formed by the upper side of the non-woven fabric and the fixed cover 5, so as to avoid affecting the test effect. In summary, the present invention separates the water film from the non-woven fabric by tilting the non-woven fabric and cooperating with the centrifugal force when the turntable 102 rotates, thereby preventing the water film from clogging the pores on the non-woven fabric, ensuring that the measured water vapor permeability is close to the true value, and ensuring the accuracy of the water vapor permeability test data. It should be noted that since the desiccant powder 9 is contained in the holding cup 8, the center of gravity of the holding cup 8 is always located at the bottom of the holding cup 8. When the test cup 4 is placed on the turntable 102 in an inclined state, the holding cup 8 rotates adaptively in the test cup 4. Figure 9 The horizontal state shown in FIG. 1 makes the upper surface of the desiccant powder 9 always keep approximately parallel with the cup opening of the holding cup 8. When the turntable 102 drives the tilted test cup 4 to rotate, the desiccant powder 9 inside the holding cup 8 drives the holding cup 8 to rotate adaptively inside the test cup 4 as shown in FIG. Figure 10 In the tilted state shown, the upper surface of the desiccant powder 9 always remains approximately parallel to the upper end surface of the cup mouth of the holding cup 8, preventing the desiccant powder 9 from being thrown out from the cup mouth of the holding cup 8, thereby ensuring that the desiccant powder 9 inside the holding cup 8 is not affected by the tilt of the test cup 4.

[0049] It is also considered that since the desiccant powder 9 has a strong hygroscopicity, it is easy to form agglomerates after absorbing moisture. After the desiccant powder 9 forms agglomerates, its surface area is reduced and its moisture absorption rate is reduced, which makes the moisture permeability test value low, resulting in a 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 protrusion 20201 on the upper side of the support plate 202, and at the same time, the elastic member 201 is compressed, causing the protrusion 20201 to repeatedly impact the bottom of the test cup 4, thereby causing the test cup 4 to be distorted. The cup 4 vibrates, and the desiccant powder 9 in the holding cup 8 is driven to vibrate together through the test cup 4, so that the desiccant powder 9 is turned over in the holding cup 8, and the water vapor entering the test cup 4 is fully absorbed, so as to prevent the desiccant powder 9 from agglomerating and causing the moisture absorption rate to decrease, thereby avoiding misjudgment of the moisture permeability of the non-woven fabric. When the test cup 4 drives the holding cup 8 to vibrate, the test cup 4 drives the non-woven fabric to vibrate together, and the flow of the water film on the non-woven fabric is accelerated by vibration, thereby enhancing the separation effect of the water film on the non-woven fabric.

[0050] When the test is completed, the staff opens the machine cover 1001, takes the test cup 4 out of the turntable 102, and places the test cup 4 in a constant temperature and humidity laboratory environment for ten minutes to allow the temperature of the test cup 4 to balance with the environment. The entire sample is then weighed and compared with the initial weight to determine the water vapor permeability of the non-woven fabric. After the weighing analysis is completed, the staff 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 under the elastic force of the elastic part 2 303, the support ring 302 is driven to rise and reset. The rubber sealing ring 6 and the non-woven fabric are then removed in turn to prepare for the next test.

[0051] Example 2: Based on Example 1, Figure 4-Figure 7 As shown, it also includes a magnetic ring 1 401 and a magnetic ring 2 402 ; the magnetic ring 1 401 is fixed to the test cup 4 ; the magnetic ring 2 402 is fixed to the lower side of the cup cover 7 ; the magnetic ring 2 402 is located directly above the magnetic ring 1 401 .

[0052] It is also taken into consideration that the sealing resin is first applied to the test cup 4, and then the non-woven fabric is placed on the test cup 4 to contact the sealing resin. Since the cloth is placed manually, the non-woven fabric may be placed crookedly. When the staff adjusts the placement of the non-woven fabric, the lower side of the detection area of ​​the non-woven fabric is prone to adhesion with the sealing resin. In subsequent tests, the area covered by the sealing resin is blocked due to the obstruction of the air permeability channel, resulting in this part being unable to participate in the normal air permeability process, thereby 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 supported by the support ring 302, and at the same time, the lower side of the non-woven fabric is in contact with the magnetic ring 1 401. After the non-woven fabric is placed, the staff drives the cup cover 7 to place the magnetic ring 2 402 It is placed on the non-woven fabric and fixed by the magnetic adsorption effect of the magnetic ring 1 401 and the magnetic ring 2 402. Then the staff applies the sealing resin to the upper side of the non-woven fabric. When the fixing cover 5 is tightened later, the rubber sealing ring 6 is squeezed through 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 by the magnetic ring 1 401 and the magnetic ring 2 402, and then the staff applies the sealing resin to prevent the non-woven fabric from being tilted and adhering to the sealing resin on the lower side of the detection area during adjustment, thereby avoiding the area covered by the sealing resin from being blocked by the air permeability channel during the test, thereby ensuring the accuracy of the water vapor permeability test value of the non-woven fabric.

[0053] A method for using a non-woven fabric production quality detector comprises the following steps:

[0054] Step 1: Sample preparation: Place 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;

[0055] Step 2: Test setup: Place the sample in the test chamber 1002 at an angle, introduce water vapor, and start environmental monitoring;

[0056] Step 3: Execute the test, start the rotation of the turntable 102 to evenly distribute the desiccant and prevent agglomeration, while draining the water film;

[0057] Step 4: Data analysis: After the test, weigh and calculate the weight gain, and combine the sensor data to obtain the transmittance;

[0058] Step 5: Reset the equipment, clean the test cup and drain the condensed water, reset the support assembly and prepare for the next test.

[0059] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made to the contents described in the claims of the present invention should be included in 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); a cover (1001) is rotatably connected to the testing machine (1); a testing chamber (1002) is provided on the testing machine (1); a temperature and humidity sensor (2) is provided in the testing chamber (1002); a pressure sensor (3) is provided in the testing chamber (1002); a vent pipe (1003) is provided on the testing machine (1); the vent pipe (1003) is connected to an external water vapor supply device; a drain pipe (1004) is provided on the testing machine (1); the vent pipe (1003) and the drain pipe (1004) are respectively connected to the upper part and the bottom part of the testing chamber (1002); the characteristics are: The apparatus further comprises a rotating assembly, a test cup (4), a fixed cover (5), a rubber sealing ring (6), a cup cover (7) and a holding cup (8); a rotating assembly for driving the non-woven fabric for rotational testing is provided on the test machine (1); a test cup (4) for holding the non-woven fabric is placed on the rotating assembly; a fixed cover (5) for fixing the non-woven fabric is connected to the upper side of the test cup (4) via a thread; a rubber sealing ring (6) is connected to the test cup (4); the rubber sealing ring (6) is located on the lower side of the fixed cover (5); a cup cover (7) for isolating the non-woven fabric from the outside is connected to the test cup (4); a holding cup (8) for holding desiccant powder (9) is rotatably connected inside the test cup (4); the holding cup (8) is configured to be spherical; The invention also includes a support assembly, which includes a magnetic rod (301), a support ring (302) and an elastic member 2 (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 that repel the magnetic rod (301) is provided on the lower side of the fixed cover (5); an elastic member 2 (303) is fixedly connected to the lower side of each magnetic rod (301); each elastic member 2 (303) is fixedly connected to the bottom of the corresponding movable cavity (4001); all the magnetic rods (301) are fixedly connected to a support ring (302) for supporting the non-woven fabric; It also includes a magnetic ring 1 (401) and a magnetic ring 2 (402); the magnetic ring 1 (401) is fixedly connected to the test cup (4); the magnetic 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 ring 2 (402) is located directly above the magnetic ring 1 (401).

2. A nonwoven fabric production quality detector according to claim 1, characterized in that: The rotating assembly comprises a motor (101) and a turntable (102); the motor (101) is fixedly connected in the test cavity (1002); the turntable (102) for carrying the test cup (4) is fixedly connected to the output end of the motor (101); the turntable (102) is arranged in a frustum shape; and a plurality of limit openings (10201) are provided on the turntable (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 is provided on the lower side of the rubber sealing ring (6) and is engaged with the groove (4002).

6. A nonwoven fabric production quality detector according to claim 5, characterized in that: The invention also includes a vibration component, which includes an elastic member (201) and a supporting plate (202); a plurality of elastic members (201) are fixedly connected in the test cavity (1002); a supporting plate (202) is fixedly connected to the upper side of all elastic members (201); a plurality of protrusions (20201) for vibrating the test cup (4) are provided on the upper side of the supporting plate (202); and the bottom of the test cup (4) is provided in a semi-spherical shape.

7. A nonwoven fabric production quality detector according to claim 6, characterized in that: The contact surfaces of the inner wall of the test cup (4) and the outer wall of the holding cup (8) are both smooth surfaces.

8. A method for using a nonwoven fabric production quality detector, characterized by: The method uses the nonwoven fabric production quality detector according to claim 7, 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, distribute the desiccant evenly and prevent agglomeration, and discharge the water film at the same time; Step 4: Data analysis: After the test, weigh and calculate the weight gain value, and combine the sensor data to obtain 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