Abstract: The air permeability of fabric is determined whether or not a comfortable key performance indicators, use herein of Labthink TQD-G1 air permeability tester permeability of a garment fabric were tested, and briefly describes the test procedure, introduced Information on equipment parameters, scope of application, etc., can provide reference for the breathability of test products in the textile industry.
Keywords : breathability, air permeability, air permeability, air permeability tester, textiles, fabric, constant flow pressure difference, constant pressure difference flow
1 , meaning
Air permeability is a physical indicator that characterizes the permeability of air in a sample to be tested. It is mainly used for materials with a large air permeability such as textiles, sponges, and leather. For fabric materials, the degree of air permeability is related to the gap between the warp and weft yarns in the fabric and the number and size of the fiber gap, the warp and weft density, the yarn twist, the fiber properties, the yarn structure, and the thickness of the fabric. According to the specific use of the fabric, it has different air permeability. For example, the air permeability of the fabric for parachute should be strictly controlled within the specified range. If the air permeability is too large, the parachute cannot be inflated, and if the air permeability is too small, it will easily lead to parachute. The stability is poor and even breakage occurs; for fabrics used as carpets, it is required to have a relatively high air permeability. Even if the fabric is made of fabric, the air permeability should be changed to ensure that the clothes are comfortable to wear. For example, the summer clothes should have a large air permeability and good heat dissipation, while the winter jacket should have a small air permeability. Improve the warmth effect. Therefore, suitable air permeability is one of the prerequisites for the fabric to have good performance.
Figure 1 fabric for various purposes
2 , the status quo
At present, the test methods of air permeability mainly include two types, namely, constant flow pressure difference method and constant pressure difference flow measurement method. The fabric type air permeability mainly adopts constant pressure difference flow measurement method, and the reference method standard is GB/T. 5453-1997 Determination of the permeability of textile fabrics.
3 , test samples
A brand of fabric material for clothing.
4 , test equipment
In this paper, the air permeability of fabric samples was tested by TQD-G1 air permeability tester independently developed by Jinan Languang Electromechanical Technology Co., Ltd.
Figure 2 TQD-G1 air permeability tester
4.1 Test principle
The device can be tested for air permeability using two methods. The principle of each method is:
Constant flow pressure difference method: After the sample is clamped, the air flow passing through the sample is stabilized at a constant flow rate by adjusting the air flow, and then the pressure difference between the two sides of the sample is tested under the condition, and then calculated. Parameters such as air flow resistance.
Constant pressure difference flow measurement method: After the sample is clamped, adjust the pressure to form a constant pressure difference on both sides of the sample. Calculate the air permeability of the sample by measuring the flow rate of the air flowing through the given area of ​​the sample for a certain period of time. Rate and other parameters.
4.2 Scope of application
(1) It is applicable to the test of air permeability and air resistance of automotive interior parts, such as polyurethane, PVC , leather, textiles, and nonwovens.
(2) Suitable for air permeability test of polymer porous elastic materials, such as sponges.
(3) Applicable to the permeability test of textile materials, such as fabrics, non-woven fabrics, etc.
(4) Suitable for the permeability test of leather materials.
(5) It is also possible to extend the air permeability test applied to paper materials, such as daily paper, roll paper, and the like.
(6) Can meet a variety of national and international standards, such as ISO 9237 , ISO 4638 , ISO 5636 , GB/T 10655 , GB/T 5453 , GB/T 4689.22 , GB/T 13764 , ASTM D737 , TAPPI T460 , JIS P8117 Wait.
4.3 Equipment parameters
- The differential pressure measurement range is 0 ~ 1 KPa , and the flow measurement range is 0 ~ 1800 L / h .
- Constant pressure difference, constant flow two measurement methods for users to choose freely.
- High-precision electronic airflow and air pressure sensors ensure the accuracy of test data.
- The system adopts microcomputer control, liquid crystal display, menu interface and PVC control panel, which is convenient for users to quickly carry out test operations and data viewing.
5 , the test process
(1) Ten pieces of a sample having a diameter of 12 cm were cut out from the surface of the fabric sample .
(2) Clamp the cut sample piece to the air permeability tester.
(3) Adjust the pressure control valve to adjust the pressure difference between the two sides of the specimen. When the pressure difference between the two sides of the sample reaches the set value, the test stops, and the device automatically displays the air flow rate through the sample under the set pressure difference.
(4) Repeat steps (2) and (3) until all 10 samples have been tested.
6 , test results
The air permeability of 10 samples was 13.15 L/min , 13.36 L/min , 13.60 L/min , 13.13 L/min , 13.11 L/min , 13.29 L/min , 13.53 L/min , 13.48 L/min , 13.29. L/min , 13.35 L/min .
7 , conclusion
Air permeability is an important property of fabrics and is closely related to the performance of the fabric. This paper introduces a TQD-G1 air permeability tester, which is a cost-effective testing equipment for air permeability testing. It has a wide range of applications, simple operation and test accuracy. High, good repeatability of test results. Labthink is committed to providing professional and intimate packaging testing equipment and services to customers around the world. In addition to the air permeability tester, Labthink provides testing equipment and services covering the barrier properties, tensile properties and resistance of packaging materials. Puncture performance, friction performance, impact resistance, tear performance, sealing performance, etc., you can visit Jinan Languang to view relevant equipment information or call us directly . The more you understand, the more you trust! Labthink is looking forward to enhancing technical exchanges and cooperation with users in various industries.
Masks Disposable medical masks are sterilized and meltblown three-layer protective surgical masks for male and female adults, strictly inspected, disinfected and sterilized. Dust-free workshop, specialized equipment, source manufacturer. Carefully packaged, safe and hygienic. Dust-free workshop, quality control. Professional equipment, source manufacturer. Automated production, quality assurance. Real material, serious and responsible. China Ffp2 Face Mask,Ffp2 KN95 Mask manufacturers, welcome Ffp2 Medical Facemask,Ffp2 Medical Respirator purchasers from worldwide to visit our site.
Ffp2 Face Mask,Ffp2 Kn95 Mask,Ffp2 Medical Facemask,Ffp2 Medical Respirator
KUTA TECHNOLOGY INDUSTRY CO.,LIMITED , https://www.kutasureblue.com