Novel catgut degreasing technological method
A new technology, the technology of sheep gut, is applied in the field of biological sutures, which can solve the problems of short time to maintain the tension strength, easy degradation of the thread body, and many fat spots in the casing material, so as to improve the degreasing efficiency and enhance the tensile strength. Effect
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Embodiment 1
[0016] It includes the following steps (1) Cleaning: select fresh sheep intestines and cattle casings, wash the blood on the surface of the casings with water, and then remove the mucous membrane, serosa, and mesentery in the casings; (2) Freeze: remove the surface moisture from the cleaned casings Then put it into the cold storage, the temperature of the cold storage is below minus 60°C, and the freezing time is 20-24h; (3) Freeze-drying: freeze-dry at minus 40-45°C for 48 hours, wrap it with filter paper and put it into the extractor; (4) Degreasing: After freeze-drying the casings, put them in sodium hydroxide solution at 18°C for 10 hours, then add petroleum ether for 12 hours.
Embodiment 2
[0018] It includes the following steps (1) Cleaning: select fresh sheep intestines and cattle casings, wash the blood on the surface of the casings with water, and then remove the mucous membrane, serosa, and mesentery in the casings; (2) Freeze: remove the surface moisture from the cleaned casings Then put it into the cold storage, the temperature of the cold storage is below minus 60°C, and the freezing time is 20-24h; (3) Freeze-drying: freeze-dry at minus 40-45°C for 48 hours, wrap it with filter paper and put it into the extractor; (4) Degreasing: After freeze-drying the casings, put them in sodium carbonate solution at 18°C for 12 hours, then add petroleum ether for 12 hours.
Embodiment 3
[0020] It includes the following steps (1) Cleaning: select fresh sheep intestines and cattle casings, wash the blood on the surface of the casings with water, and then remove the mucous membrane, serosa, and mesentery in the casings; (2) Freeze: remove the surface moisture from the cleaned casings Then put it into the cold storage, the temperature of the cold storage is below minus 60°C, and the freezing time is 20-24h; (3) Freeze-drying: freeze-dry at minus 40-45°C for 48 hours, wrap it with filter paper and put it into the extractor; (4) Degreasing: After freeze-drying the casings, put them in potassium carbonate solution at 18°C for 8 hours, then add petroleum ether for 12 hours.
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