Fabric air permeability is a measure to what extent it gives air passing through the fabric. Air permeability, a given area in the vertical direction of the air flow rate, a given time period, is measured by the fabric test area inside the pressure difference of the fabric. Basically, it depends on weight, thickness and porosity of fabric. The porosity of fabric is the demonstration of the air gap as a percentage within fabric. It has been important for especially the tent fabric, parachute fabric, raincoat fabric and garment, the fabric used in air bags, industrial filters and sail cloth. Moreover, when thermal properties of clothing and body interaction are taken into consideration, there has been the effect of air permeability. there is an instrument which is designed to test the air permeability of fabric on the market .it is air permeability tester.
Air permeability is an important feature of fabrics (Sundaramoorthy et al., 2011) and is one of the main factors affecting the thermal comfort of the user (Angelova et al., 2013). ASTM D737-75 defines air permeability as air the rate of air flow passing perpendicularly through a known area under a prescribed air pressure differential between the two surfaces of a material (ASTM D737-96 1996). In summer, atmospheric heat and sweat transfer from the human body is mainly due to the permeability of the clothing material; for this reason, a highly permeable material is preferred. Winter clothing, however, should be less permeable to protect the human body from cold weather (Sundaramoorthy et al., 2011). In some products, such as tents, sleeping bags, etc., low air permeability is required to provide comfort for the wearer. Towel fabric require high air permeability for bathing gown and slippers (Petrulyte and Baltakyte, 2008, Singh and Verma, 2016).
Air Permeability Tester for textiles is used for air permeability testing of the fabrics. Digital and analog models are available. This system consists of an arrangement for holding the test specimens between two flat faces so as to expose a known area to the flow of air through it, a vacuum system to draw air through the exposed area of the test specimens. There is an arrangement to measure the volume of air flowing through the test specimen, and arrangement to measure the pressure drop between the faces of the test specimen.
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For more information about our testing instrument, please contact
·website:http://www.qinsun-lab.com/
· +86-21-6780 0179
· info@qinsun-lab.com
· or leave your comments below
Air permeability is an important feature of fabrics (Sundaramoorthy et al., 2011) and is one of the main factors affecting the thermal comfort of the user (Angelova et al., 2013). ASTM D737-75 defines air permeability as air the rate of air flow passing perpendicularly through a known area under a prescribed air pressure differential between the two surfaces of a material (ASTM D737-96 1996). In summer, atmospheric heat and sweat transfer from the human body is mainly due to the permeability of the clothing material; for this reason, a highly permeable material is preferred. Winter clothing, however, should be less permeable to protect the human body from cold weather (Sundaramoorthy et al., 2011). In some products, such as tents, sleeping bags, etc., low air permeability is required to provide comfort for the wearer. Towel fabric require high air permeability for bathing gown and slippers (Petrulyte and Baltakyte, 2008, Singh and Verma, 2016).
Air Permeability Tester for textiles is used for air permeability testing of the fabrics. Digital and analog models are available. This system consists of an arrangement for holding the test specimens between two flat faces so as to expose a known area to the flow of air through it, a vacuum system to draw air through the exposed area of the test specimens. There is an arrangement to measure the volume of air flowing through the test specimen, and arrangement to measure the pressure drop between the faces of the test specimen.
-------------------------------------------------------------------
For more information about our testing instrument, please contact
·website:http://www.qinsun-lab.com/
· +86-21-6780 0179
· info@qinsun-lab.com
· or leave your comments below
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