The invention belongs to the field of biological suture lines and particularly relates to a novel catgut
degreasing technological method. The novel catgut
degreasing technological method includes the following steps of 1, cleaning, wherein a fresh sheep intestine and a cattle casing are selected, blood-containing water on the surface of the casing is washed away with
clean water, and then mucosa, serosa and mesentery in the casing are removed; 2, freezing, wherein the cleaned casing is placed in a
refrigeration house after
surface water of the casing is removed, the temperature of the
refrigeration house is below -60 DEG C, and the
refrigeration time ranges from 20 h to 24 h; 3, freeze-
drying, wherein freeze-
drying is carried out for 48 hours at the temperature of -40 DEG C to -45 DEG C, the casing is wrapped by
filter paper, and the casing is put in an extractor; 4,
degreasing, wherein the freeze-dried casing is put in alkali liquor at the temperature of 18 DEG C to be treated for 8-12 h, and then a degreasing agent is added for treatment for 12 h.
Degreasing efficiency is improved, the degreasing rate reaches 98%, no fat white dot exists on the appearance of a catgut body, and anti-tensile strength is enhanced by 20%.