Detection of down feathers and their productsHow to apply for a report? What items need to be tested? We will conduct testing and evaluation in strict accordance with the standards. We can also provide personalized testing plans and reports according to your needs.

Organizational structure

Wool is a slender solid cylinder that is curly in shape. The tissue structure of fibers is divided into three layers, namely the scale layer, cortex layer, and medulla layer Scale layer: The scale layer is the surface layer of wool, which grows in a certain direction from the hair root to the hair tip. Each scale is connected to the cortical layer at one end of the hair root, and the other end is stretched outward, covering and connecting one by one. The coverage density of scales on wool varies greatly due to the variety of wool. The finer the wool, the more scales it has, the longer the overlapping parts it covers, and the more circular the scales are. The thicker the wool, the fewer the scales, and the shorter the overlapping length. The scales are mostly corrugated and fish like, overlapping and covering each other. Due to the outward extension and protrusion of the scale layer, increasing the frictional force between fibers can result in mutual restraint and felting effect, enhancing the adhesion force under humid and hot conditions. The scale layer can also give wool a good luster. The tough scale structure gives wool resistance to friction and pollution Cortical layer: The cortical layer is the main component of wool fibers, which is composed of many protein cells, and its constituent substances are called keratins or keratins. Cells adhere to each other and there are gaps between them. The cortical layer is the main part that determines the physical, mechanical, and chemical properties of wool fibers. It is divided into two types: the positive cortex layer and the secondary cortex layer. In curly wool fibers, they can be straightened and extended by about 20% under stress, and can be restored to their original curly state after relaxation. The cells on the outer side of the curl wave are called positive cortical cells, while the cells on the inner side are called paracortical cells. The positive cortex has lower sulfur content than the secondary cortex, making it more chemically active and easy to stain. The opposite is true for the subcortical layer. In fine wool of excellent varieties, two types of cortical layer cells aggregate on both sides of the hair stem and intertwine along the fiber axis, known as bilateral isomerism

Medulla layer: The medulla layer is an opaque loose substance located in the center of wool fibers. Generally, fine wool has no medullary layer, while thicker wool has varying degrees of medullary layer. The more medulla, the flatter and rougher the appearance of wool, and the poorer its quality. Wool containing a large amount of medullary layer, which is brittle, less curly, and dry, is called dead hair. Some wool has discontinuous pith, with both fine and coarse hairs on one fiber. This type of wool is called two types of wool

Test report function

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4、Papers and scientific research: providing professional and personalized testing needs；

5、Judicial services: providing scientific, fair and accurate testing data；

6、Industrial problem diagnosis: verifying the troubleshooting and correction of problems in industrial production；