A five-layer co-extrusion film for transfusion and its preparation process
A preparation process and a technology for transfusion membranes, which are applied in the field of five-layer co-extrusion transfusion membranes and their preparation processes, can solve the problems of high equipment requirements, low membrane cost, poor flexibility, etc., to avoid secondary pollution, low adsorption, good flexibility effect
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[0041] Such as figure 1 Shown is the distribution of each layer of the five-layer co-extruded film of the present invention. Depend on figure 1 It can be seen that the five-layer co-extruded film of the present invention is composed of the outer layer, the second outer layer, the middle layer, the second inner layer and the inner layer respectively in terms of structural composition.
[0042] The total thickness of the five-layer co-extruded film is 160-220 μm.
[0043] Prepare the outer layer from the raw materials in the following mass percentages: homopolypropylene 80%, styrene-ethylene-butadiene hydrogenated block copolymer 20%; wherein homopolypropylene is measured according to GB-T3682 at 230°C / The melt flow rate of 2.16Kg is 7.0g / 10min; the melt flow rate of styrene-ethylene-butadiene hydrogenated block copolymer is 3.0g / 10min measured at 230℃ / 2.16Kg according to GB-T3682; the thickness In 20 ~ 30μm;
[0044] The preparation of the second outer layer consists of th...
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