| abstract |
The invention belongs to the field of medical materials, and discloses a stable and biodegradable medical film material which comprises the following components in parts by weight: 25-40 parts of polyethylene, 10-30 parts of chitosan, 2-8 parts of sodium carboxymethyl cellulose, 1-3 parts of cellulose acetate butyrate, 6-10 parts of acetyl citrate, 3-8 parts of tri-n-butyl citrate, 10-20 parts of zinc diacetate, 10-20 parts of starch, 1-3 parts of zinc oxide and 0.1-1 part of polyvinylpyrrolidone. Compared with the prior art, the medical film material has good safety, and can resist the temperature of 150 ℃ above zero and the temperature of 25 ℃ below zero; the medical film material has good biodegradability, has a degradation rate of 85.9 percent in 30 days under natural conditions, is suitable for low-temperature existing blood or medicine, and is environment-friendly; the preparation method is simple and suitable for industrial mass production. |