Polyester film and producing process thereof
A technology of polyester film and photopolyester, applied in the field of polyester film and its manufacturing, can solve the problems of affecting the scope and effect of use, high production cost of polyester film, pollution of production environment, etc. performance, effect of preventing environmental pollution
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Embodiment 1
[0040]1), select 20 parts of regenerated particles with an intrinsic viscosity of 0.595 or more; adopt conventional PTA method to synthesize 1.5 parts of super bright chips containing IPA1.7%; 55.5 parts of super bright polyester chips without any additives, the intrinsic viscosity Both are above 0.62; 15 parts of polyester chip masterbatches containing silicon oxide concentration of 3200PPM; 8 parts of polyester chips containing calcium acetate 90PPM.
[0041] 2) Mix the above five kinds of slices, crystallize at 190°C, dry at 160°C for 3 hours, melt and extrude at 285°C when the water content of the slices is less than 30PPM, and cast in a quenching roll at 25°C.
[0042] 3) Longitudinal stretching was carried out at a stretching temperature of 82°C and a stretching ratio of 3.35, and cooling treatment was carried out at 35°C.
[0043] 4) Transverse stretching is carried out at a stretching temperature of 102° C. and a stretching ratio of 3.65.
[0044] 5) Heat setting at 2...
Embodiment 2
[0048] Get 30 parts of silicon oxide polyester chips; 20 parts of regenerated particles; 50 parts of super-bright polyester chips; make a film according to the method of Example 1, and obtain a film with a thickness of 10 μ whose properties are shown in Table 1
[0049] After the capacitor film made by this method is made into a capacitor, the withstand voltage durability becomes poor at high temperature, but it can be used normally at 85 ° C, and the dielectric loss tangent % is relatively high. Its outstanding advantage is lower cost.
Embodiment 3
[0051] Get 22 parts of silicon oxide polyester slices; get 8 parts of calcium acetate polyester slices; get 20 parts of regenerated particles; get 50 parts of super-bright polyester slices; make film according to the method of Example 1 to obtain a film with a thickness of 6 μ and its properties see table 1
[0052] It can be seen that the addition of calcium acetate improves the performance of insulation, dielectric loss tangent, and 105°C withstand voltage durability at high temperatures.
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