Dermal collagen fiber prepared from tanning chromium-containing subsidiary waste

Abstract

The invention discloses a dermal collagen fiber prepared from tanning chromium-containing subsidiary waste and a preparation method thereof. In the preparation method, the tanning chromium-containing subsidiary waste is used as a raw material, is subjected to processing of puffing, separating fibers, splitting fibers and carding and the like by a physical, chemical and biochemical combination method on the premise of ensuring unchanged good physical and mechanical conditions of collagen fibers, and is prepared into the dermal collagen fiber with good performance and wide application ranges. The dermal collagen fiber reaches the following technical indexes: (1) the outer surface is provided with light blue fiber materials and does not have visible impurities; (2) the moisture content is between 18 and 25 percent; (3) the linear density is between 1.2 and 2.0 dtex; (4) the fiber length is between 20 and 30mm; (5) the breaking strength is more than or equal to 3.5 cN / tex; (6) the elongation at break is between 10 and 30 percent; and (7) the moisture regain is between 6 and 10 percent. The dermal collagen fiber can be used as raw materials of high-simulation leather (automobile seat leather, furniture leather, instep leather, garment leather, shoe lining leather, belt leather, luggage leather and the like), natural leather base cloth, senior carpets, senior wall paper, dermal fiber bedding and the like.

Description

technical field

[0001] The invention relates to a leather collagen fiber prepared by using chromium-containing by-products of tanning and a preparation method thereof, belonging to the field of light industry and textiles. Background technique

[0002] Chromium by-products from tanning is one of the long-term unresolved public hazards in the tanning industry. For more than 100 years, chrome tanning has dominated the tanning industry. Some data show that in the process of tanning, about 30% of the raw hides become chromium-containing by-products (Nie Linshan, Qiang Xihuai, Zhang Chuanbo. Progress in the treatment of tannery by-waste[J]. Environmental pollution and Control. 2001, 23(5): 268-270). my country's current leather output accounts for 20-25% of the world's total, and is mainly split blue wet leather. It is estimated that about 500,000-700,000 tons (wet weight) of chromium-containing by-products are produced every year (Lin Wei, Mu Changdao , Zhang Mingrang. Recycli...