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.