A device and method for detecting the wet pick-up of a fabric using a ramped resistance method

Abstract

The application discloses a kind of detection device and method for detecting fabric wet adhesion performance with slope resistance method;The present application includes slope, electrode, photoelectric gate and control module, realize the synchronous detection of fabric resistance (reflecting moisture content) and slider slide time (reflecting adhesion), build MAI comprehensive index, first time water content and adhesion are related, solve the technical defects that existing method cannot represent wet state and sticky state simultaneously, realize the accurate quantitative evaluation of fabric wet adhesion performance.Adapt to the wet adhesion performance detection of various close-to-body fabrics (cotton fabric, chemical fabric, etc.), MAI index directly reflects the wet state, sticky state and quick-drying performance of fabric, and is highly consistent with the body feeling when wearing, and can be widely applied in the fields of textile fabric production, quality detection, scientific research experiment, etc.

Description

Technical Field

[0001] This invention belongs to the field of fabric performance testing technology, specifically relating to an apparatus and method for testing the wet adhesion properties of fabrics using the inclined plane resistance method. It is particularly suitable for the comprehensive testing of the wet adhesion and quick-drying properties of close-fitting fabrics such as cotton and chemical fiber fabrics, and can realize instrumental automatic testing and data output. Background Technology

[0002] The wet stickiness of a fabric is one of the core indicators for evaluating the comfort of close-fitting fabrics. It is directly related to the moisture content and surface adhesion of the fabric after it absorbs moisture—the higher the moisture content after the fabric absorbs moisture, the stronger the surface adhesion, the more obvious the wet stickiness discomfort, and the worse the quick-drying performance. Currently, most methods for testing the wet stickiness of fabrics rely on subjective manual evaluation or single-parameter measurement, which suffers from drawbacks such as low testing accuracy, strong subjectivity, inability to achieve simultaneous multi-parameter testing, and low instrumentation level.

[0003] In the existing technology, some detection methods evaluate quick-drying performance by measuring the moisture content of the fabric, which cannot reflect the discomfort of being wet and sticky; some methods measure adhesion force by sliding friction, but the operation is cumbersome and inefficient, and cannot achieve a synchronous correlation between moisture content and adhesion force; at the same time, existing detection devices are complex in structure and expensive, making it difficult to achieve miniaturized and instrumented batch testing, and cannot meet the needs of standardized laboratory testing and industrial production testing.

[0004] Therefore, developing a simple, highly instrumented testing device and method that can simultaneously detect fabric moisture content and adhesion, and quantify wet adhesion performance through a single comprehensive index, has become an urgent technical problem to be solved in the field of fabric performance testing. Summary of the Invention

[0005] This invention provides an apparatus and method for detecting the wet adhesion properties of fabrics using the inclined plane resistance method.

[0006] The present invention adopts the following technical solution: A device for detecting the wet adhesion properties of fabrics using the inclined plane resistance method includes an inclined plane assembly, an electrode assembly, a photoelectric gate timing assembly, and a control assembly. The inclined plane assembly includes an inclined plane body and a support. The inclined plane body is inclinedly mounted on the support. The inclination angle of the inclined plane body on the support is adjustable. A photoelectric gate timing component is provided on one side of the starting point at the upper end and the ending point at the lower end of the inclined plane body. An electrode component is provided at the lower end of the upper surface of the inclined plane body. The control component includes a control module, a resistance acquisition module, a timing module, a data processing module, and a display module. The upper surface of the inclined plane is used to lay the fabric to be tested, which covers the electrode assembly. During testing, a standard slider slides from the upper starting point to the lower ending point on the surface of the fabric to be tested. During the sliding process, it simulates the movement of the skin layer along the fabric to be tested. The resistance acquisition module is used to acquire the resistance data R0 and R of the dry and wet fabric to be tested at the starting point through the electrode assembly. t And automatically convert it into fabric conductivity data G0 and G. t ; The timing module is used to collect the time data of the standard slider passing the starting point and the ending point through the photoelectric gate timing component, and to obtain the time t0 required for the standard slider to slide from the starting point to the ending point on the dry test fabric and the time t0 required for the standard slider to slide from the starting point to the ending point on the wet test fabric. t The data processing module and display module are used to process data according to the formula MAI=G. t ×t t The comprehensive index MAI is automatically calculated, displayed, and stored by (G0×t0).

[0007] Furthermore, the inclined surface body is made of a rigid insulating plastic material with magnetic powder evenly distributed inside, and the tilt angle can be adjusted from 0 to 90°.

[0008] Furthermore, the simulated skin layer on the standard slider is a medical silicone sheet with a thickness of 1-3 mm.

[0009] Furthermore, the electrode assembly includes two metal electrodes, which are fixed parallel to each other at the bottom of the inclined plane body. The distance between the two metal electrodes is 2-5 cm, and the upper surface of the electrodes is flush with the upper surface of the inclined plane body. The photoelectric gate timing assembly includes four infrared photoelectric gates. Infrared photoelectric gates are provided on both sides of the starting and ending points of the inclined plane, and the line connecting them on the same side is parallel to the center line of the inclined plane body.

[0010] Furthermore, during testing, the fabric to be tested can be detachably fixed to the inclined surface body via a magnetic suction device.

[0011] A method for testing the wet adhesion properties of fabrics, based on the aforementioned testing device, includes the following steps: Step 1: The dry fabric to be tested is detachably fixed to the inclined plane body using a magnetic suction device, the electrodes are covered, the standard slider is placed at the starting point of the inclined plane to simulate skin contact with the fabric to be tested, and the photoelectric gate timing component at the starting point of the upper end of the inclined plane body is aligned. Step 2: Adjust the angle of the inclined plane and release the standard slider. The slider slides down naturally under gravity. During the sliding process, the simulated skin layer moves down along the fabric to be tested and passes through the photoelectric gate timing component at the end of the lower end of the inclined plane body. The resistance acquisition module acquires the resistance data R0 of the fabric under test when the standard slider is at the starting point through the electrode assembly, and automatically converts it into the conductivity data G0 of the fabric. Step 3: Spray deionized water onto the fabric to be tested to allow the water to penetrate evenly, and control the moisture content of the fabric to be tested to the preset moisture content. Place the standard slider at the starting point of the inclined plane to simulate the skin layer contacting the wet fabric to be tested, and align the photoelectric gate timing component at the starting point of the upper end of the inclined plane body. Step 4: Adjust the angle of the inclined plane and release the standard slider. The slider slides down naturally under gravity. During the sliding process, the simulated skin layer moves down along the wet fabric to be tested and passes the photoelectric gate timing component at the end of the lower end of the inclined plane body. The resistance acquisition module acquires the resistance data R1 of the wet fabric under test when the standard slider is at the starting point through the electrode assembly, and automatically converts it into the fabric conductivity data G1. Step 5: The timing module uses the photoelectric gate timing component to collect the time t0 required for the standard slider to slide from the starting point to the ending point on the dry test fabric and the time t0 required for it to slide from the starting point to the ending point on the wet test fabric. t The data processing module and display module are used to process data according to the formula MAI=G. t ×t t / (G0×t0) automatically calculates and displays the comprehensive index MAI; Step 6: Repeat steps 1-5 multiple times to remove outliers, and take the average value of the comprehensive index MAI to obtain the final value of the comprehensive index MAI. Use the final value of the comprehensive index MAI to evaluate the wet adhesion performance of the fabric.

[0012] Furthermore, in step 3, the preset moisture content of the fabric is 10%-150%.

[0013] Furthermore, in step 6, the wet fabric is tested every 2 to 10 minutes.

[0014] Furthermore, the standard slider remains stationary each time it is released, ensuring a uniform release position. The beneficial effects of this invention are: This invention enables the simultaneous detection of fabric resistance (reflecting moisture content) and standard slider sliding time (reflecting adhesion), constructs a comprehensive evaluation index (MAI), and solves the technical defects of existing detection methods, such as strong subjectivity, cumbersome operation, low instrumentation level, and inability to simultaneously characterize wet and viscous states. It achieves rapid, accurate, and instrumentation-based detection of fabric wet adhesion properties. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the detection device of the present invention; The attached diagram lists the components represented by each number as follows: 1. Inclined plane assembly; 2. Electrode assembly; 3. Photogate timing assembly; 4. Control assembly; 5. Standard slider; 6. Fabric to be tested; 7. Magnetic suction device Detailed Implementation

[0016] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0017] An apparatus for detecting the wet adhesion properties of fabrics using the inclined plane resistance method includes the following components: Inclined surface assembly: The inclined surface body is made of rigid insulating plastic material with magnetic powder evenly distributed inside. Dimensions: 50cm long, 15cm wide, and 2cm thick; Inclined surface tilt angle is set at 30°; Stainless steel adjustable bracket, with an inclined surface levelness error of ≤0.5°; The standard slider is made of stainless steel, weighs 100g, and has a bottom surface of 5cm×5cm. A simulated skin layer is attached to the bottom surface of the standard slider. The simulated skin layer is a medical silicone sheet with a thickness of 2mm.

[0018] Electrode assembly: Two copper sheet electrodes, 2cm×2cm and 0.2mm thick, with a 3cm spacing between them, are fixed parallel to each other at the bottom of the inclined plane, with the upper surface of the electrodes flush with the inclined plane layer; PVC insulating electrode holders, and copper core wires connecting the electrodes to the control module resistance acquisition module.

[0019] Photoelectric gate timing component: Two sets of infrared photoelectric gates (starting point photoelectric gate and ending point photoelectric gate), installed 5cm below the top of the slope and 5cm above the bottom; ABS adjustable photoelectric gate fixing frame, signal transmission line connected to the control module timing module.

[0020] A method for detecting the wet adhesion properties of fabrics using the inclined plane resistance method includes the following steps: (1) Sample pretreatment: Cut 3 pieces of 15cm×15cm cotton fabric. The wet fabric is prepared by spraying deionized water after the dry fabric test is completed, with an initial moisture content of 20%, and sealing and covering for 10 minutes to allow the moisture to penetrate evenly.

[0021] (2) Device debugging: Adjust the inclination angle of the inclined plane to ensure that the slider can slide freely. Use a standard resistor to calibrate the resistance acquisition module (error ≤ 5%) and a standard timer to calibrate the timing module (error ≤ 0.01s). Sample fixation: Lay the fabric flat on the test panel to completely cover the lower double electrodes; place the standard slider at the positioning position above the starting photoelectric gate, align the center of the standard slider with the photoelectric detection center, set the detection interval of the control module to 5min, and start data storage.

[0022] (3) Synchronous detection: The standard slider is released from rest without initial velocity. The starting photogate starts timing and the ending photogate stops timing. The dry state sliding baseline time t0 and the wet state sliding baseline time t are obtained.t The resistance acquisition module collects the fabric resistance in real time, automatically converts it into conductivity, and obtains the dry-state reference conductivity G0 and the wet-state reference conductivity G. t .

[0023] (4) Comprehensive index calculation: The control module and data module automatically calculate MAI=G t ×t t / (G0×t0), the value is displayed on the screen in real time and stored in the SD card.

[0024] (5) Dynamic continuous detection: Repeat steps 3-4 at 5 min, 10 min, 15 min, 20 min and 30 min respectively to continuously track the dynamic changes of fabric dryness and adhesion.

[0025] (6) Parallel sample testing and result evaluation: The remaining 2 groups of samples were tested in the same way throughout the process. The arithmetic mean of the 3 groups of data after removing outliers was taken. In this case, the average MAI was 1.12. Judgment rules: The higher the MAI value, the higher the fabric moisture content, the stronger the adhesion, and the worse the wearing comfort; the lower the MAI value, the faster the drying, the weaker the adhesion, and the better the comfort; this sample has a low MAI value, excellent wet adhesion performance, and a slight sticky feeling when close to the skin.

[0026] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A device for detecting the wet adhesion properties of fabrics using the inclined plane resistance method, characterized in that, Includes inclined plane assembly, electrode assembly, photoelectric gate timing assembly and control assembly; The inclined plane assembly includes an inclined plane body and a support. The inclined plane body is inclinedly mounted on the support. The inclination angle of the inclined plane body on the support is adjustable. A photoelectric gate timing component is provided on one side of the starting point at the upper end and the ending point at the lower end of the inclined plane body. An electrode component is provided at the lower end of the upper surface of the inclined plane body. The control component includes a control module, a resistance acquisition module, a timing module, a data processing module, and a display module. The upper surface of the inclined plane is used to lay the fabric to be tested, which covers the electrode assembly. During testing, a standard slider slides from the upper starting point to the lower ending point on the surface of the fabric to be tested. During the sliding process, it simulates the movement of the skin layer along the fabric to be tested. The resistance acquisition module is used to acquire the resistance data R0 and R of the dry and wet fabric to be tested at the starting point through the electrode assembly. t And automatically convert it into fabric conductivity data G0 and G. t ; The timing module is used to collect the time data of the standard slider passing the starting point and the ending point through the photoelectric gate timing component, and to obtain the time t0 required for the standard slider to slide from the starting point to the ending point on the dry test fabric and the time t0 required for the standard slider to slide from the starting point to the ending point on the wet test fabric. t The data processing module and display module are used to process data according to the formula MAI=G. t ×t t The comprehensive index MAI is automatically calculated, displayed, and stored by (G0×t0).

2. The apparatus for detecting the wet adhesion properties of fabrics using the inclined plane resistance method according to claim 1, characterized in that, The inclined surface body is made of a rigid insulating plastic material with magnetic powder evenly distributed inside, and the tilt angle can be adjusted from 0 to 90°.

3. The apparatus for detecting the wet adhesion properties of fabrics using the inclined plane resistance method according to claim 1, characterized in that, The simulated skin layer on the standard slider is a medical silicone sheet with a thickness of 1-3 mm.

4. The apparatus for detecting the wet adhesion properties of fabrics using the inclined plane resistance method according to claim 1, characterized in that, The electrode assembly includes two metal electrodes, which are fixed parallel to each other at the bottom of the inclined plane body. The distance between the two metal electrodes is 2-5 cm, and the upper surface of the electrodes is flush with the upper surface of the inclined plane body. The photoelectric gate timing assembly includes four infrared photoelectric gates. Infrared photoelectric gates are provided on both sides of the starting and ending points of the inclined plane, and the line connecting them on the same side is parallel to the center line of the inclined plane body.

5. The apparatus for detecting the wet adhesion properties of fabrics using the inclined plane resistance method according to claim 1, characterized in that, During testing, the fabric to be tested can be detachably fixed to the inclined surface body using a magnetic suction device.

6. A method for testing the wet adhesion properties of fabrics, based on the testing device according to any one of claims 1 to 4, characterized in that: Includes the following steps: Step 1: The dry fabric to be tested is detachably fixed to the inclined plane body using a magnetic suction device, the electrodes are covered, the standard slider is placed at the starting point of the inclined plane to simulate skin contact with the fabric to be tested, and the photoelectric gate timing component at the starting point of the upper end of the inclined plane body is aligned. Step 2: Adjust the angle of the inclined plane and release the standard slider. The slider slides down naturally under gravity. During the sliding process, the simulated skin layer moves down along the fabric to be tested and passes through the photoelectric gate timing component at the end of the lower end of the inclined plane body. The resistance acquisition module acquires the resistance data R0 of the fabric under test when the standard slider is at the starting point through the electrode assembly, and automatically converts it into the conductivity data G0 of the fabric. Step 3: Spray deionized water onto the fabric to be tested to allow the water to penetrate evenly, and control the moisture content of the fabric to be tested to the preset moisture content. Place the standard slider at the starting point of the inclined plane to simulate the skin layer contacting the wet fabric to be tested, and align the photoelectric gate timing component at the starting point of the upper end of the inclined plane body. Step 4: Adjust the angle of the inclined plane and release the standard slider. The slider slides down naturally under gravity. During the sliding process, the simulated skin layer moves down along the wet fabric to be tested and passes the photoelectric gate timing component at the end of the lower end of the inclined plane body. The resistance acquisition module acquires the resistance data R1 of the wet fabric under test when the standard slider is at the starting point through the electrode assembly, and automatically converts it into the fabric conductivity data G1. Step 5: The timing module uses the photoelectric gate timing component to collect the time t0 required for the standard slider to slide from the starting point to the ending point on the dry test fabric and the time t0 required for it to slide from the starting point to the ending point on the wet test fabric. t The data processing module and display module are used to process data according to the formula MAI=G. t ×t t / (G0×t0) automatically calculates and displays the comprehensive index MAI; Step 6: Repeat steps 1-5 multiple times to remove outliers, and take the average value of the comprehensive index MAI to obtain the final value of the comprehensive index MAI. Use the final value of the comprehensive index MAI to evaluate the wet adhesion performance of the fabric.

7. The method for testing the wet adhesion properties of fabrics according to claim 6, characterized in that: In step 3, the preset moisture content of the fabric is 10%-150%.

8. The method for testing the wet adhesion properties of fabrics according to claim 6, characterized in that: In step 6, the wet fabric is tested every 2 to 10 minutes.

9. The method for testing the wet adhesion properties of fabrics according to claim 6, characterized in that: Keep the standard slider stationary each time it is released, and release positions should be consistent.

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