Preparation method of double-side metallized polypropylene capacitor film
A technology of polypropylene capacitors and double-sided metals, which is applied to fixed capacitor parts, laminated capacitors, fixed capacitor dielectrics, etc., can solve problems such as low yield, high scrap rate, and poor ability to withstand large currents. The effect of high yield and low cost
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[0022] Example 1
[0023] A method for preparing a double-sided metallizable polypropylene capacitor film, which comprises the following steps:
[0024] 1) Raw materials: polypropylene raw materials with isotacticity ≥98.5% and ash content less than or equal to 20ppm, polypropylene particles produced by BOREALLS POLYMERS in Belgium;
[0025] 2) Extruding the cast sheet from the extruder: put the polypropylene raw material processed in step 1) into the extruder and extrude it into a sheet melt, and the temperature of the extruder is 230~265℃;
[0026] 3) Chilling roll and air shower cooling: the sheet melt prepared in step 2) is cooled and shaped by chilling roll and air shower to obtain thick sheet, the temperature of chilling roll is 90 ℃, and the thickness of thick sheet is the finished product. 9 times the thickness;
[0027] 4) Longitudinal stretching: the thick sheet obtained in step 3) is subjected to longitudinal preheating, stretching and shaping in sequence, the pre...
Example Embodiment
[0035] Example 2
[0036] A method for preparing a double-sided metallizable polypropylene capacitor film, which comprises the following steps:
[0037] 1) Raw materials: polypropylene raw materials with isotacticity ≥98.5% and ash content less than or equal to 20ppm, polypropylene particles produced by BOREALLS POLYMERS in Belgium;
[0038] 2) Extruding the cast sheet from the extruder: put the polypropylene raw material processed in step 1) into the extruder and extrude it into a sheet melt, and the temperature of the extruder is 230~265℃;
[0039] 3) Chilling roll and air shower cooling: the sheet melt prepared in step 2) is cooled and shaped by chilling roll and air shower to obtain thick sheet, the temperature of chilling roll is 100 ℃, and the thickness of thick sheet is the finished product 10 times the thickness;
[0040] 4) Longitudinal stretching: the thick sheet obtained in step 3) is subjected to longitudinal preheating, stretching and shaping in sequence, the pr...
Example Embodiment
[0047] Example 3
[0048] A method for preparing a double-sided metallizable polypropylene capacitor film, which comprises the following steps:
[0049] 1) Raw materials: polypropylene raw materials with isotacticity ≥98.5% and ash content less than or equal to 20ppm, polypropylene particles produced by BOREALLS POLYMERS in Belgium;
[0050] 2) Extruding the cast sheet from the extruder: put the polypropylene raw material processed in step 1) into the extruder and extrude it into a sheet melt, and the temperature of the extruder is 230~265℃;
[0051] 3) Chilling roll and air shower cooling: the sheet melt prepared in step 2) is cooled and shaped by chilling roll and air shower to obtain thick sheet, the temperature of chilling roll is 108 ℃, and the thickness of thick sheet is the finished product 11 times the thickness;
[0052] 4) Longitudinal stretching: the thick sheet obtained in step 3) is subjected to longitudinal preheating, stretching and shaping in sequence, the pr...
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