Knowledge Of Leather And Footwear Materials

Leather is animal skin, which is obtained from the physical and chemical processing processes such as meat removal, degreasing, hair removal, softening, fatliquoring, tanning and dyeing.

Leather is different from leather, leather is not swelling, not rotten and moisture resistance is good. Leather has certain formability, porosity, flexibility and fullness. Leather not only keeps the fiber structure but also has excellent physical properties.

　　 Leatherwear It is made of natural protein fibers which are tanned to form intermolecular bonds in three-dimensional space and thus tightly woven. The surface of leather has a special granular layer, which has natural grain and gloss and comfortable handle. It has unique properties of natural materials: higher mechanical strength, certain elasticity and plasticity, easy maintenance, good heat and humidity stability, corrosion resistance, excellent air permeability (steam), moisture absorption (sweat) and moisture removal.

Leather can be divided into: leather for life, leather for national defense, leather for industrial and agricultural use, and leather for cultural and sporting goods. Tanning methods are divided into: chrome tanned leather, vegetable tanned leather, oil tanned leather, aldehyde tanning leather and tanned leather. In addition, it can be divided into light leather and heavy leather. Generally used Shoe upper Leather, clothing, gloves and other leather, called light leather, is measured on the basis of area. Light leather is added to the inner surface of the leather, so that the friction between the surfaces of the fibers is approximately equal to the friction force of the oil molecules, so that the skin will be very soft. leather shoes Leather, such as inner, outsole and industrial fittings, is called heavy leather and is measured by weight.