Moisture Detection in Wool Fiber
  • Moisture Detection in Wool Fiber


    The amount of moisture contained in textile raw materials and products is very important in many respects. In order not to buy a commodity at more than its value in the purchase and sale of raw materials, it is necessary to know the commercial humidity value and to measure the humidity by taking samples that objectively reflect the moisture value of the raw material to be purchased. Textile materials are affected by the relative humidity of the surrounding air. As the relative humidity in the air increases, the moisture contained in the textile materials also increases. Wool is the fiber that absorbs the most moisture. The most important feature of wool fibers is that they release a lot of heat during moisture absorption. For this reason, wool fibers are the most suitable textile material to be used in winter in terms of comfort and health.


    Businesshumidity in enterprises



    It is necessary to process raw material (wool), semi-finished product (band, roving) and finished product (yarn) with minimum waste and high efficiency in spinning mills.


    For this, the humidity-temperature values ​​of raw materials, semi-products, products and factories must be in certain amounts.


    Humidity is also very important in the buying and selling of wool.


    The air in the atmosphere is not fully saturated with water vapor.


    The air contains only a certain amount of water vapor, that is, humidity, under a certain temperature and pressure.


    1-İrelative humidity:It is the ratio of the actual water vapor pressure (Pd) in the air to the water vapor pressure (Pt) in the saturated air at the same temperature. It is expressed as a percentage.


    2-absolute humidity


    The amount of water vapor in a given unit volume is called. m3 is the amount of water vapor in grams in the air.


    Moisture Percentage Wool fibers have a high moisture absorption feature. It is more moisture absorbent than any fiber. It takes 20% humidity at 65 degrees Celsius and 16% relative humidity.


    Wool fibers lose their moisture if heated at 100–110 degrees Celsius in dry air.


    Fiber celsius hardens and loses strength.

    Humid air and it becomes plastic.


    In wool fiber, dry strength is high and wet strength is low.


    Wool fibers can absorb moisture up to half their own weight.


    In this respect, the amount of moisture on wool fibers in trade is limited to 16-18%.


    Normally, the moisture content in wool fiber is 12-14%. Fine wool absorbs less moisture, coarse wool absorbs more moisture.


    Moisture Quantityı


    Fiber or fabric left in a humid air collects water on it.


    A damp or wet fiber or fabric loses its water in dry air.


    Water uptake (absorption) or loss (desorption) continues until an equilibrium is established.


    The faster a fiber absorbs water, the faster it dries.


    Many properties of the fiber such as its handling, workability and static electricity depend on the moisture content.


    Humidity ( % ) = [( Wet weight - Dry weight ) / Dry weight ] * 100


    Moisture ( % ) = [( Wet weight - Dry weight ) / wet weight ] * 100


    Standard conditions for commercial humidity value; It is 65±2 % relative humidity, 20±2 ºC temperature.





    by %AM, 20% 922% 2016 00%:%May in Quality control Read 4107 times

Moisture Detection in Wool Fiber