Humidification for the textile industry


Yarns and fabrics react quickly to overly dry or overly damp air. Fibers become brittle, and fabrics shrink or stretch lengthwise or crosswise. This lowers the quality of semi-finished or finished products.

In addition, the static charge also spoils the workmanship of textiles as charged fibers pull apart from each other, card or comb poorly, and stick to the guide lugs.

The threads are then at risk of breaking and produce an irregular woven fabric and clothes that lose their shape. Furthermore, textiles and leather goods are increasingly being manufactured in countries with challenging climatic conditions. It is all the more important to ensure a constant level of humidity in these countries and ensure quality and productivity in production.

Moisture loss in dry air

Rate of change for moisture loss of different textiles
if they are exposed to dry air

Static charges


Static charge can occur on unearthed production equipment, or on the textiles themselves.

At a relative humidity of 50–55%, damp air increasingly settles on ions, making them heavier and less mobile in the electric field. The conductivity of the air and the material surfaces then increases, so that electrical charges are dissipated, which prevents the formation of potential differences.
Dry air below 40% RH can cause
electrical potential differences
At 50–55% RH, electrical charges can dissipate
due to the increased conductivity
Material Application Temperature [°C] rel. Humidity [% r.h.]
Cotton Pre-treatment 20 - 25 50 - 60
Cotton Carding 20 - 25 65 - 70
Cotton Combing 20 - 25 55 - 65
Cotton Spinning 20 - 25 40 - 65
Cotton Weaving 22 - 25 70 - 85
Cotton Finishing 20 - 25 65
Wool Carding/Combing 20 - 25 65 - 80
Wool First spinning 22 - 25 60 - 65
Wool Ring spinning 22 - 25 55 - 60
Wool Weaving 22 - 25 55 - 65
Silk Spinning 22 - 25 65 - 70
Silk Weaving 22 - 25 60 - 70
Rayon Spinning 20 - 22 80 - 90
Rayon Twisting 20 - 22 70 - 80
Man-made fibers Viscose 25 - 27 60 - 65
Man-made fibers Perlon/Nylon 25 - 27 65 - 70
Man-made fibers Ribbons 22 - 25 70 - 75
Man-made fibers Stretch fabric 22 - 25 60 - 70
Man-made fibers Pantyhose 20 - 25 50 - 60
Man-made fibers Pantyhose 20 - 25 65 - 75
Man-made fibers Bandages 22 - 25 60 - 75
Man-made fibers Carpets 20 - 26 65 - 70