WO2024030097A1 - Device and method for electrical characterization of textile products - Google Patents
Device and method for electrical characterization of textile products Download PDFInfo
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- WO2024030097A1 WO2024030097A1 PCT/TR2023/050715 TR2023050715W WO2024030097A1 WO 2024030097 A1 WO2024030097 A1 WO 2024030097A1 TR 2023050715 W TR2023050715 W TR 2023050715W WO 2024030097 A1 WO2024030097 A1 WO 2024030097A1
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- Prior art keywords
- fabric
- sample
- voltage
- textile
- metal plate
- Prior art date
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- 239000004753 textile Substances 0.000 title claims abstract description 23
- 238000012512 characterization method Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title abstract description 35
- 239000004744 fabric Substances 0.000 claims description 37
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 24
- 239000000523 sample Substances 0.000 description 27
- 239000000463 material Substances 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 210000002268 wool Anatomy 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 229920002334 Spandex Polymers 0.000 description 3
- 238000009940 knitting Methods 0.000 description 3
- 239000004759 spandex Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 238000007794 visualization technique Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/367—Fabric or woven textiles
Definitions
- the present invention relates to a new measurement system and method for characterizing the electrical properties of special purpose textile articles.
- Method 1 The method is based on investigating the sample surface electrical parameters when the textile is affected by the ion flux generated by a corona charger. In the method applied, it can measure the time -dependent dependencies of the accumulated electrical charge of the sample. The time dependencies of the electric charge and surface voltage accumulated on the surface of the sample are determined. There are two different measurement processes.
- Process 1 When the sample is affected by ion flow, the electric charge (Q) is measured, and the surface tension (V) is measured during the time interval when the accumulation of ions is stopped; the amount of electric charge and surface tension is measured at regular intervals and the charging process of the examined sample is investigated.
- Process 2 After a period in which the sample is affected by the ion flux and electrically charged, the surface tension (V) dependence on time t is measured. In this process, in the case of periodic measurement of the surface voltage of the sample examined when the corona charger is turned off, the electrical discharge process is investigated. The experiment is carried out by exposing the sample to positive or negative ions produced in humid air at atmospheric pressure by a corona charger [1] .
- Method 2 This method is a surface tension distribution visualization method.
- the method in which the examined material is affected by the ion flow is also applicable for textile materials surface tension distribution visualization.
- the voltage distribution over the entire surface of the examined textile material is measured by fixing it on a mechanically rotating cylinder.
- a step-by-step ring scanning mode is applied, and the measured data is collected and visualized on a computer [2] .
- the textile sample is charged with static electricity by friction (triboelectric loading) and the electric field intensity at a single point on the surface of the sample is measured and recorded by means of a computer-attached electrostatic field meter.
- triboelectric loading triboelectric loading
- the electric field intensity at a single point on the surface of the sample is measured and recorded by means of a computer-attached electrostatic field meter.
- cylindrical aluminum, or high-density polyethylene (HDPE) rods are preferred for electrostatic loading.
- the textile sample is electrically charged by electrostatic induction method and the electric field intensity on the fabric surface is measured and recorded and analyzed with the help of an electrostatic field meter connected to a computer.
- the surface resistance of the textile sample is measured by contacting a circular probe to the sample fabric and passing a certain amount of current through it.
- the main object is to measure whether or how long a sample textile product holds the load with an electric charge by electrostatic loading.
- each region of the fabric surface is considered the same in terms of conductivity. It is also assumed that the samples taken fully reflect the electrical characteristics of the textile product from which the sample was taken. For example, measurements are made on samples of approximately 50 cm 2 for a 4 m 2 sofa fabric with various patterns on it, that is, the knitting frequency is not the same in each region.
- Figure 1 Block diagram of the measurement system of the invention
- Figure 3 Graph of distribution of surface voltage by location
- the measurement system of the invention includes a high voltage source (1), a corona discharge bar (2), a copper plate (4) grounded in the form of a half cylinder, and a voltage sensor (5).
- the data received from the sensor is transferred to the computer for processing. The operation principle of the device subject to the invention is described below.
- the non-contact voltage sensor (5) is designed to measure from multiple points by moving it on a single axis ( Figure-1).
- the sample fabric is moved over the half-cylindrical grounded copper plate (4).
- the voltage sensor (5) is positioned above the sample and the fabric (3) is moved under the sensor (5). Acting with the scanning logic, the points in a certain area are measured at a certain resolution.
- the half-cylindrical grounded metal is preferably moved back and forth by the fabric sample (3), which is placed on the copper plate (4), step motor- 1 (7). The speed and step amount of this movement can be controlled, that is, how much the fabric will advance in each cycle.
- High-voltage power supply (1) and corona discharge loading bar (2) are used for electrostatic loading on the fabric surface.
- the non-contact voltage sensor (5) is positioned at a certain fixed height from the fabric surface.
- the sensor makes measurements by moving through the step motor-2 in a linear direction to cut the direction of movement of the fabric perpendicularly.
- the analog signal at the output of the sensor module is converted to digital with the help of an analog-to-digital converter (ADC) and processed and transferred to the computer via USB line.
- ADC analog-to-digital converter
- the PC MEGA microcontroller development platform was used to control all these processes and transfer the measurement data to the computer environment. Two different methods were used for the measurement of fabric samples. In the first method, after the fabric surface is electrostatically loaded, the sensor is fixed on the loading area and the measurement is made at a single point. Short-term discharge characteristic of the fabric is obtained in this method.
- the surface of the fabric was scanned by the sensor and measurement was performed from many points.
- a 3D voltage-position graph and electrostatic charge map of the fabric surface are obtained.
- the speed of the motors used in this method, the measurement scale of the sensor, the resolution of the ADC module used, the capacity of the electrostatic loading bar and the interface embedded system circuits and the speed of the computer software are open to improvement.
- Figure 2 shows the graphical discharge curves presented.
- Samples Cotton, synthetic (lycra), wool and linen fabrics.
- Samples Cotton, synthetic (lycra), wool and linen fabrics.
- Sample 50mm wide wool fabric.
- the graph presented in Figure 3 shows the distribution of the surface voltage on the 50 mm wide wool fabric according to the location.
- the measured value decreases as it progresses on the Y-axis. This is because the load on the fabric surface is discharged during measurement.
- Sample Anti-static mattress fabric with '+' marking on it with nylon yam.
- Figure-4a shows the photograph of the sample and Figure-4b shows the electrostatic charge map. As the value of the surface voltage increases in Figure-4b, the color temperature of the pixel cell equivalent to the region measured on the map increases.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The present invention relates to a novel measurement system and method for characterizing the electrical properties of special purpose textile articles.
Description
DESCRIPTION
DEVICE AND METHOD FOR ELECTRICAL CHARACTERIZATION OF TEXTILE PRODUCTS
Technical Field
The present invention relates to a new measurement system and method for characterizing the electrical properties of special purpose textile articles.
State of the Art
It is known that electrostatic discharge can cause serious problems in some cases (for example, the possibility of hazardous explosions in explosive atmospheres), damage products in electronic assembly, impair the quality of products, and create problems related to user health. Textile materials (textiles, fabrics, upholstery fabrics) are widely used and are known for their ability to accumulate electrical charge. Therefore, in order to avoid such undesirable effects, the textile material needs to be developed in such a way that it has acceptable electrostatic properties. In special purpose textile products (for example, anti-static fabrics), it is necessary to routinely measure parameters such as electrical conductivity and static electric charge reliably.
Considering the studies conducted on the measurement of the accumulated load on the surface of textile products, textile materials are usually subjected to electrical flow in the studies. There are several known methods for measuring the accumulated load with this method.
Method 1: The method is based on investigating the sample surface electrical parameters when the textile is affected by the ion flux generated by a corona charger. In the method applied, it can measure the time -dependent dependencies of the accumulated electrical charge of the sample. The time dependencies of the electric charge and surface voltage accumulated on the surface of the sample are determined. There are two different measurement processes.
• Process 1: When the sample is affected by ion flow, the electric charge (Q) is measured, and the surface tension (V) is measured during the time interval when the accumulation of ions is stopped; the amount of electric charge and surface tension is measured at regular intervals and the charging process of the examined sample is investigated.
• Process 2: After a period in which the sample is affected by the ion flux and electrically charged, the surface tension (V) dependence on time t is measured. In this process, in the case of periodic measurement of the surface voltage of the sample examined when the corona charger is turned off, the electrical discharge process is investigated. The experiment is
carried out by exposing the sample to positive or negative ions produced in humid air at atmospheric pressure by a corona charger [1].
Method 2: This method is a surface tension distribution visualization method. The method in which the examined material is affected by the ion flow is also applicable for textile materials surface tension distribution visualization. The voltage distribution over the entire surface of the examined textile material is measured by fixing it on a mechanically rotating cylinder. For surface tension measurement, a step-by-step ring scanning mode is applied, and the measured data is collected and visualized on a computer [2].
Today, three methods are generally used for the electrostatic characterization of textile products. In the first method, the textile sample is charged with static electricity by friction (triboelectric loading) and the electric field intensity at a single point on the surface of the sample is measured and recorded by means of a computer-attached electrostatic field meter. In this method, cylindrical aluminum, or high-density polyethylene (HDPE) rods are preferred for electrostatic loading.
In the other method, the textile sample is electrically charged by electrostatic induction method and the electric field intensity on the fabric surface is measured and recorded and analyzed with the help of an electrostatic field meter connected to a computer. In the last method, the surface resistance of the textile sample is measured by contacting a circular probe to the sample fabric and passing a certain amount of current through it. In all of these methods, the main object is to measure whether or how long a sample textile product holds the load with an electric charge by electrostatic loading.
In the current conventional methods, each region of the fabric surface is considered the same in terms of conductivity. It is also assumed that the samples taken fully reflect the electrical characteristics of the textile product from which the sample was taken. For example, measurements are made on samples of approximately 50 cm2 for a 4 m2 sofa fabric with various patterns on it, that is, the knitting frequency is not the same in each region. Today, especially in textile products called "technical textiles", it is not homogeneous because it varies significantly in terms of both knitting frequency, knitting technologies and materials used. It is also debatable how realistic it is to make the electrical properties of such textile products only over a small area of 50 cm2.
In addition, these tests and measurements are carried out in a separate laboratory from the production line in a city or even in other countries, causing serious costs and delays in qualification processes.
Descriptions of the Figures
Figure 1 : Block diagram of the measurement system of the invention
Figure 2: Graph of fabric surface discharge curve
Figure 3 : Graph of distribution of surface voltage by location
Figure 4a: Sample
Figure 4b: Electrostatic charge map of the sample
Element Numbers in the Figures
1. High Voltage Source
2. Corona Discharge Bar
3. Fabric sample
4. Grounded Copper Plate
5. Non-Contact Voltage Sensor
6. Sensor analog interface circuit (V)
7. Step motor- 1 (Ml)
8. Step motor-2 (M2)
9. Microcontroller (uC)
10. Computer (PC)
Detailed Description of the Invention
The measurement system of the invention includes a high voltage source (1), a corona discharge bar (2), a copper plate (4) grounded in the form of a half cylinder, and a voltage sensor (5). The data received from the sensor is transferred to the computer for processing. The operation principle of the device subject to the invention is described below.
In the device of the invention, the non-contact voltage sensor (5) is designed to measure from multiple points by moving it on a single axis (Figure-1). The sample fabric is moved over the half-cylindrical grounded copper plate (4). At this time, the voltage sensor (5) is positioned above the sample and the fabric (3) is moved under the sensor (5). Acting with the scanning logic, the points in a certain area are measured at a certain resolution. The half-cylindrical grounded metal is preferably moved back and forth by the fabric sample (3), which is placed on the copper plate (4), step motor- 1 (7). The speed and step amount of this movement can be controlled, that is, how much the fabric will advance in each cycle. High-voltage power supply (1) and corona discharge loading bar (2) are used for electrostatic loading on the fabric surface. For the measurement process, the non-contact voltage sensor (5) is positioned at a
certain fixed height from the fabric surface. The sensor makes measurements by moving through the step motor-2 in a linear direction to cut the direction of movement of the fabric perpendicularly. The analog signal at the output of the sensor module is converted to digital with the help of an analog-to-digital converter (ADC) and processed and transferred to the computer via USB line. The Arduino MEGA microcontroller development platform was used to control all these processes and transfer the measurement data to the computer environment. Two different methods were used for the measurement of fabric samples. In the first method, after the fabric surface is electrostatically loaded, the sensor is fixed on the loading area and the measurement is made at a single point. Short-term discharge characteristic of the fabric is obtained in this method.
In the other method, after loading, the surface of the fabric was scanned by the sensor and measurement was performed from many points. In this method, a 3D voltage-position graph and electrostatic charge map of the fabric surface are obtained. The speed of the motors used in this method, the measurement scale of the sensor, the resolution of the ADC module used, the capacity of the electrostatic loading bar and the interface embedded system circuits and the speed of the computer software are open to improvement.
1. Results Obtained from Sample Measurements Using the Method
A) Graphs of fabric surface discharge curve:
Figure 2 shows the graphical discharge curves presented.
Samples = Cotton, synthetic (lycra), wool and linen fabrics.
Eoading voltage = 15000 V
Number of measurements = 500
When the discharge curves shown in Figure 2 are examined, it is seen that the synthetic (lycra) fabric holds on the static electricity for a much longer time than other samples. It is seen that the linen fabric completely discharges the static electricity on it in a very short time compared to other samples.
B) Measured electrical discharge parameters of the samples
Samples = Cotton, synthetic (lycra), wool and linen fabrics.
Eoading voltage = 15,000 V
Number of measurements= 1,000
Maximum surface voltage (Vmax), time at which the maximum voltage value falls in half (tmed), time constant time (T) and surface voltage measured on the fabric surface after 5T time (Vs)
Considering the parameters related to the discharge times of the samples presented in the table presented above Lme" at the linen fabric 0 9 ip 0 54 static electricity over 0.54 seconds. The samples with the best discharge performance according to half-lives (tmed) are listed as follows; linen, cotton, wool, synthetic
2. Sample Measurements Made by Method:
A) 3D Voltage-Position graph of fabric surface:
Sample = 50mm wide wool fabric.
Loading voltage = 10,000 V
Number of measurements = 2,000
The graph presented in Figure 3 shows the distribution of the surface voltage on the 50 mm wide wool fabric according to the location. The measured value decreases as it progresses on the Y-axis. This is because the load on the fabric surface is discharged during measurement.
B) Electrostatic load map of fabric surface:
Sample = Anti-static mattress fabric with '+' marking on it with nylon yam.
Loading voltage = 10,000 V
Number of measurements =5,000
Figure-4a shows the photograph of the sample and Figure-4b shows the electrostatic charge map. As the value of the surface voltage increases in Figure-4b, the color temperature of the pixel cell equivalent to the region measured on the map increases.
References:
1. Dascalescu, L., Plopeanu, M., Tabti, B., Antoniu, A., Dumitran, L.-M., Notingher, P-V. Corona Charging of Composite Non- Woven Media for Air Filtration Proc. ESA Annual Meeting on Electrostatics Paper D3 June 22 - 24, 2010: pp. 1 - 7.
2. Mr Pranas Juozas ZILINSKAS, Mr Tadeus LOZOVSKI, Mr Vygintas JANKAUSKAS, Mr Justinas JURKSUS. ISSN 1392-1320 MATERIALS SCIENCE (MEDZIAGOTYRA). Vol. 19, No. 1. 2013
Claims
1. A device for electrical characterization of textile products, characterized in comprising voltage source (1), corona discharge bar (2), a half-cylinder grounded metal plate (4) on which the sample fabric is to be moved, and a voltage sensor (5) positioned to see the sample on the metal plate from above.
2. The device according to Claim 1, characterized in that said metal plate is copper.
3. The device according to Claim 1, characterized in comprising a step motor (7) enabling the fabric sample (3) placed on the metal plate (4) to be moved back and forth.
4. The device according to Claim 1, characterized in that the voltage sensor (5) is structured to move in the axis perpendicular to the direction of movement of the fabric (3).
5. The device according to Claim 1, characterized comprising a converter that converts the analog signal received from the voltage sensor (5) into digital.
6. The device according to Claim 1, characterized in further comprising a computer (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2022012312 | 2022-08-03 | ||
| TR2022/012312 TR2022012312A1 (en) | 2022-08-03 | Device and method for electrical characterization of textile products. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024030097A1 true WO2024030097A1 (en) | 2024-02-08 |
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ID=89849501
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2023/050715 WO2024030097A1 (en) | 2022-08-03 | 2023-07-21 | Device and method for electrical characterization of textile products |
Country Status (1)
| Country | Link |
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| WO (1) | WO2024030097A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005115063A1 (en) * | 2004-05-20 | 2005-12-01 | Universidade Do Minho | Continuous and semi-continuous treatment of textile materials integrating corona discharge |
| RU2284468C1 (en) * | 2005-06-07 | 2006-09-27 | Государственное образовательное учреждение высшего профессионального образования "Орловский государственный технический университет" (ОрелГТУ) | Method of measuring length of moving cloth |
| CN112796094A (en) * | 2020-12-15 | 2021-05-14 | 广东金发科技有限公司 | Corona electret device capable of resisting charge attenuation and application method |
-
2023
- 2023-07-21 WO PCT/TR2023/050715 patent/WO2024030097A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005115063A1 (en) * | 2004-05-20 | 2005-12-01 | Universidade Do Minho | Continuous and semi-continuous treatment of textile materials integrating corona discharge |
| RU2284468C1 (en) * | 2005-06-07 | 2006-09-27 | Государственное образовательное учреждение высшего профессионального образования "Орловский государственный технический университет" (ОрелГТУ) | Method of measuring length of moving cloth |
| CN112796094A (en) * | 2020-12-15 | 2021-05-14 | 广东金发科技有限公司 | Corona electret device capable of resisting charge attenuation and application method |
Non-Patent Citations (1)
| Title |
|---|
| BRZEZIŃSKI S., POŁOWIŃSKI S., KOWALCZYK DOROTA, MALINOWSKA G.: "Effect of corona discharge treatment on the surface strength and performance properties of synthetic fibre textiles", FIBRES & TEXTILES IN EASTERN EUROPE, vol. 5, no. 76, 1 January 2009 (2009-01-01), pages 62 - 68, XP093137395 * |
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