| 摘要 |
Method of preparing a biologically degradable film, which film consists of synthetic polymer and biologically degradable polymer. In the method small particles are made from said biologically degradable polymer in a water suspension by means of enzymes that split and release small molecyles from the surface of the biopolymer particles. When the wished particle size is achieved, vegetable oil is emulgated in the system and the particles coated with enzyme protein obtained in the step a) are coated with vegetable oil at the same time as the act of degradation of the biopolymer particles by the enzymes are interrupted. The particles coated with oil obtained in the foregoing stages are separated from the suspension to remove small molecyles after which the particles are redried and thereafter pulverized. The final film is preparated in a film extruder in which the biopolymer is mixed with the synthetic polymer and other additives that generally are used in a film. |
