Transfusion bag with self-contraction function and transfusion bag special material thereof

The invention relates to a transfusion bag with a self-contraction function and a transfusion bag special material thereof. The transfusion bag special material comprises the following materials: medical-grade high temperature resistant polypropylene, a medical-grade polyolefin elastomer, an anti-oxidant, and an acid scavenger. The manufacturing process of the transfusion bag of the invention comprises the following steps: weighing according to the formula; well mixing the raw materials; performing extrusion granulation by a double screw extruder, cooling with circulating water, drying in the air, and cutting granules mechanically. According to the transfusion bag special material of the invention, a POE elastomer is added into the raw materials, which increases the flexibility of the transfusion bag, and provides the self-contraction function for the transfusion bag which is produced by injection molding, stretching, blow molding technology and has an elliptic cross section; the bag prepared by the transfusi