A kind of method for preparing polyvinylidene fluoride film
A polyvinylidene fluoride and film technology, which is applied in the field of preparation of polyvinylidene fluoride films, can solve the problems of low light transmittance, aging resistance, low light transmittance, high light transmittance, etc., and achieves low cost and reduced transmittance. Light rate, the effect of reducing light
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Embodiment 1
[0035] Preparation of modified titanium dioxide: First, dissolve 2g of potassium perfluorobutane sulfonate in an alcohol-water mixed solution of 2000g of ethanol and 8000g of deionized water and mix well, then add 100g of titanium dioxide, stir at 50°C for 2h, and finally filter , washing, drying, and airflow pulverization to obtain titanium dioxide modified by a fluorine-containing surfactant.
[0036] Preparation of vinylidene fluoride film: Weigh the raw materials according to the formula in Table 1 and mix them in a high-speed mixer at room temperature for 20 minutes until the materials are evenly stirred. Put the above compound into a twin-screw extruder, melt, extrude and granulate at 180-230°C to obtain PVDF color masterbatch. The masterbatch is added to the single-screw extruder and melted and plasticized at 200-230°C, then passed through the film die and molded by a casting stretching device, and the film is passed through, heat-treated at 150°C and shaped, then trimm...
Embodiment 2
[0038] Preparation of modified titanium dioxide: Dissolve 1g of potassium perfluorobutane sulfonate in an alcohol-water mixed solution of 4000g of ethanol and 6000g of deionized water and mix well, then add 1000g of titanium dioxide into the mixture, and stir at 60°C 2h, finally filtered, washed, dried, and jet milled to obtain fluorine-containing surfactant-modified titanium dioxide.
[0039] Preparation of vinylidene fluoride film: Weigh the raw materials according to the formula in Table 1 and mix them in a high-speed mixer at room temperature for 20 minutes until the materials are evenly stirred. Put the above compound into a twin-screw extruder, melt, extrude and granulate at 180-230°C to obtain PVDF color masterbatch. The masterbatch is added to the single-screw extruder and melted and plasticized at 200-230°C, then passed through the film die and molded by a casting stretching device, and the film is passed through, heat-treated at 150°C and shaped, then trimmed and cut...
Embodiment 3
[0042] Preparation of modified titanium dioxide: first, the surface of titanium dioxide is modified. Dissolve 20g of sodium perfluorononyloxybenzenesulfonate in an alcohol-water mixed solution of 5,000g of ethanol and 5,000g of deionized water and mix well, then add 2,000g of titanium dioxide into the mixture, stir at 50°C for 3h, and finally filter , washing, drying, and airflow pulverization to obtain titanium dioxide modified by a fluorine-containing surfactant.
[0043] Preparation of vinylidene fluoride film: Weigh the raw materials according to the formula in Table 1 and mix them in a high-speed mixer at room temperature for 20 minutes until the materials are evenly stirred. Put the above compound into a twin-screw extruder, melt, extrude and granulate at 180-230°C to obtain PVDF color masterbatch. The masterbatch is added to the single-screw extruder and melted and plasticized at 200-230°C, then passed through the film die and molded by a casting stretching device, and...
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