Wool Yarn Yarn Net

The main component of wool is keratin, which is composed of a variety of α-amino acid residues, which can be combined into long-chain molecules in a spiral shape, which contain carboxyl groups, amine groups and hydroxyl groups, forming salt bonds between the molecules. and hydrogen bonds, etc. The long chains are linked by cross-bonds formed by disulfide bonds of cystines. The above chemical structure determines the characteristics of wool. If the long chain of wool fiber macromolecules is stretched by external force, it transitions from α-type helical shape to β-type extension type, and returns to α-type after the external force is removed, then its appearance is excellent in elongation deformation and resilience of wool. The stronger hygroscopic ability of wool is related to some groups on the long chain. Wool is more acid-resistant than alkali-resistant, because alkalis are prone to disulfide groups in wool cystine, which damages the wool. Oxidizing agents can also damage the wool by destroying the disulfide groups.

Acrylic wool yarn

The physical properties of wool mainly include fineness, length, bending, strength and elongation, elasticity, felting, hygroscopicity, color and luster. Fineness is an important process characteristic to determine the quality and use value of wool fiber, which is expressed by the diameter of the fiber in microns or the quality count; the smaller the fineness, the higher the count, and the finer the spun yarn.

polyester wool yarn

The fineness of the same type of hair is proportional to its strength, and the thicker the hair, the greater the strength. The more developed the medulla with medullary hairs, the worse its ability to resist breaking. The elongation of wool is generally up to 20 to 50%. Elasticity allows the product to maintain its original form and is an indispensable characteristic of wool for carpets and blankets. The felting and hygroscopic properties of wool are generally better. The luster is often related to the state of scale coverage on the surface of the fiber. The fine hair has a weak reflection ability to light, and the luster is softer; the luster of the coarse hair is strong and shiny. Weak luster is often caused by damage to the scaly layer.