Preparation method of full biodegradation film
A degradable film and all-biological technology, which is applied in the field of film-level resin modification and film preparation, can solve the problems of white pollution, high cost, and impact on acceptance, and achieve reduced production costs, good elongation at break, and high elasticity good modulus
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Embodiment 1
[0026] (1) Weigh 40 parts of PBAT, 30 parts of starch, 10 parts of PCL, 10 parts of epoxidized soybean oil, and 10 parts of talcum powder;
[0027] (2) Add the raw materials into the high-speed mixer in a certain order. The order of addition is starch, talcum powder, PCL, epoxy soybean oil, and PBAT; the mixing speed is turned to high speed, and the high-speed mixing is about 15 minutes ready to discharge;
[0028] (3) Add the mixed raw materials into the hopper of the twin-screw extruder, set the temperature zones of the twin-screw extruder, the operating temperature is 100-180°C, and the PBAT modification can be obtained after strand cutting Sexual resin;
[0029] (4) Put the PBAT modified resin into a vacuum rake dryer, set the temperature at 80°C, keep the vacuum bag at 0.01MPa, and dry it for about 4 hours until the water content of the resin is ≤500ppm;
[0030] (5) Put the dried PBAT modified resin into the film blowing machine to blow the film. The operating temperat...
Embodiment 2
[0032] (1) Weigh 50 parts of PBAT, 30 parts of starch, 10 parts of PCL, 10 parts of epoxidized soybean oil, and 0 parts of talcum powder;
[0033] (2) Add the raw materials into the high-speed mixer in a certain order. The order of addition is starch, talcum powder, PCL, epoxy soybean oil, and PBAT; the mixing speed is set to high speed, and the high-speed mixing is about 15 minutes ready to discharge;
[0034] (3) Add the mixed raw materials into the hopper of the twin-screw extruder, set the temperature zones of the twin-screw extruder, the operating temperature is 100-180°C, and the PBAT modification can be obtained after strand cutting Sexual resin;
[0035] (4) Put the PBAT modified resin into a vacuum rake dryer, set the temperature at 80°C, keep the vacuum bag at 0.01MPa, and dry it for about 4 hours until the water content of the resin is ≤500ppm;
[0036] (5) Put the dried PBAT modified resin into the film blowing machine to blow the film. The operating temperature ...
Embodiment 3
[0038] (1) Weigh 55 parts of PBAT, 30 parts of starch, 5 parts of PCL, 10 parts of epoxidized soybean oil, and 0 parts of talcum powder;
[0039] (2) Add the raw materials into the high-speed mixer in a certain order. The order of addition is starch, talcum powder, PCL, epoxy soybean oil, and PBAT; the mixing speed is set to high speed, and the high-speed mixing is about 15 minutes Ready to ship.
[0040] (3) Add the mixed raw materials into the hopper of the twin-screw extruder, set the temperature zones of the twin-screw extruder, the operating temperature is 100-180°C, and the PBAT modification can be obtained after strand cutting Sexual resin;
[0041] (4) Put the PBAT modified resin into a vacuum rake dryer, set the temperature at 80°C, keep the vacuum bag at 0.01MPa, and dry it for about 4 hours until the water content of the resin is ≤500ppm;
[0042] (5) Put the dried PBAT modified resin into the film blowing machine to blow the film. The operating temperature of eac...
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