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What is "Air Permeability" - Definition & Explanation

The volume of air passing through a fabric under pressure.
The porosity of a fabric as estimated by the ease with which air passes through it. Air permeability measures the warmth of blankets, the air resistance of parachute cloth, the wind resistance of sailcloth, etc. as measured on standard testing equipment.
The permeablity, or the ease with which air passes through material. Air porous ness determines such factors as the wind resistance of sailcloth, the air resistance of parachute cloth, and the effectiveness of different kinds of air filtration media. It is also a measure of warmness, or coolness of a fabric.
The degree to which a fabric, coating or laminate allows air to pass through its construction.

Some other terms

Some more terms:

Removal of loose threads, knots, slubs, burs, and other extraneous materials from fabrics by means of a burling iron, a type of tweezer. The trick is to remove the impurity without damaging the...
A 3 tone effect that changes with the angle of view. It is achieved by using a warp yarn of one color and double weft yarns of 2 different colors. It is often found in taffetas, poplins or failles of...
Two separate fabrics faces knitted independently and then connected by a separate spacer yarn. These fabrics can be produced on both circular and flat knitting machines. Spacer fabrics have the...
A knit or woven fabric made from a rough, curly, knotted boucle yarn. The fabric has a looped, knotted surface and is often used in sportswear and coats. Made from wool, but also in rayon, silk,...
A chemical process in which short fuzzy fibres are sealed into a yarn or are removed from the cloth to make the fabric more porous. The strength of the fabric is not impaired. A porous fabric permits...

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