皮料知识(国外英文资料).docVIP

皮料知识(国外英文资料) Leather knowledge I. understanding of leather material: 1, the industrys understanding of leather: Leather is a common term in the leather goods market. It is a custom used to distinguish synthetic leather (synthetic leather) from natural leather. In the consumers concept, leather also has a non false meaning. It is mainly made from the skin of animals. Leather variety, variety, structure, quality, price difference. Therefore, the dermis is not only a general term for all natural leather, but also an ambiguous sign on the commodity market. 2, the meaning of leather in the physiological point of view: According to the physiological point of view, any animal skins have hair, epidermis and dermis. Because the dermis contains a network of small fiber bundles, they all have considerable strength and breathability. The epidermis is located under the hair and clings to the dermis. It is arranged in different shapes of epidermal cells. The thickness of the epidermis varies with the animal, for example, the thickness of the epidermis is 0.5 to 1.5% of the total thickness; the sheepskin and goat skin are 2 to 3%; the pigskin is 2 to 5%. Leather is located below the epidermis, between epidermis and subcutaneous tissue, is an important part of raw hide. Above the weight or thickness of about 90% hides. Two: the types of leather commonly used Leather frequently used in leather industry is the life of the more common cattle leather, pig leather, sheep leather, but in fact most of animal leather can be used as raw materials, leather, pigskin, sheepskin just because the price is reasonable for cost control, and the yield is very large, it will become the main materials used for the production of leather industry. Although most other animal leather can be used for leather production, such as crocodile and ostrich skin, snake skin, pearl skin and so on, but the price is higher than the ordinary leather a lot, and with the awareness of animal protection and animal protect