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Biaxially-oriented polypropylene film for capacitor, metal deposition film thereof and cast raw sheet

A technology of polypropylene film and biaxial stretching, which is applied in the direction of capacitors, fixed capacitors, fixed capacitor dielectrics, etc., can solve the problem of not being able to fully satisfy the winding processing adaptability of voltage-resistant components at the same time, and achieve high component processing adaptability , High stretchability, high dielectric breakdown strength effect

Inactive Publication Date: 2010-12-08
OJI PAPER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with these technologies, it is still not possible to fully satisfy the stringent requirements related to high-temperature withstand voltage, ultra-thin film reduction, and device winding processing adaptability in the rapidly developing capacitor industry.

Method used

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  • Biaxially-oriented polypropylene film for capacitor, metal deposition film thereof and cast raw sheet
  • Biaxially-oriented polypropylene film for capacitor, metal deposition film thereof and cast raw sheet
  • Biaxially-oriented polypropylene film for capacitor, metal deposition film thereof and cast raw sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0192] Prime Polymer Co., which is the additive resin (B), was dry-blended at an addition rate of 10% by mass with resin No. 1 pellets manufactured by Prime Polymer Co., Ltd. as the main resin (A) with a [mmmm] of 97%. , Ltd. made [mmmm] 94% resin No. 2, the obtained resin mixture pellets [mixing (1)] were supplied to an extruder, melted at a resin temperature of 250°C, and extruded using a T-die out, wound up on a metal drum whose surface temperature was kept at 90° C., and solidified to produce a cast green sheet with a thickness of about 250 μm. Next, the unstretched cast green sheet was stretched to 5 times in the longitudinal direction at a temperature of 140° C., immediately cooled to room temperature, and then stretched to 10 times in the transverse direction at a temperature of 165° C. with a tenter, A thin biaxially stretched polypropylene film with a thickness of 5 µm was obtained.

[0193] Table 1 summarizes the molecular properties and addition ratios of the resin...

Embodiment 2

[0195] The mixed resin pellets supplied to the extruder were replaced with resin mixture pellets [mixing (2)] obtained by changing the addition rate of resin No. Other than that, in the same manner as in Example 1, a thin biaxially stretched polypropylene film with a thickness of 5 μm was obtained.

[0196] Table 1 summarizes the molecular properties and addition ratios of the resins, and Table 2 summarizes the film evaluation results.

Embodiment 3

[0198] The mixed resin pellets supplied to the extruder were mixed with resin No. 3 of [mmmm] 92.5% manufactured by Prime Polymer Co., Ltd. as the added resin (B) at an addition rate of 10% by mass. A thin biaxially stretched polypropylene film having a thickness of 5 μm was obtained in the same manner as in Example 1 except for the resin mixture pellets [mixing (3)].

[0199] Table 1 summarizes the molecular properties and addition ratios of the resins, and Table 2 summarizes the film evaluation results.

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Abstract

Provided is a biaxially-oriented polypropylene film for a capacitor, metal evaporated film using the capacitor and cast raw sheet for obtaining the same. The biaxially-oriented polypropylene film for a capacitor is obtained by adding 92-95% of addition resin B in a quantity ([mmmm]) of 1-20 mass% in relation to the total mass of the resin mixture, in a main resin A with the internal compensation five unit group percentage ([mmmm]). The film is a biaxially-oriented polypropylene film composed of more than two kinds of different stereoregularity in the isotactic polypropylene resin with molecular properties. The temperature of a mechanical dispersion peak (crystal dispersion) (tan delta ) in a temperature loss tangent curve, which is obtained by a dynamic solid viscoelasticity measurement at a heating rate of 2[deg] C / minutes with a frequency of 0.5 Hz, is >= 80[deg] C.

Description

technical field [0001] The present invention relates to a biaxially stretched polypropylene film for capacitors having excellent voltage resistance, a metallized polypropylene film, and a cast green sheet for obtaining the same; Biaxially oriented polypropylene film for capacitors having excellent voltage resistance, suitable for small and large-capacity capacitors for electronic and electric devices, and having a very thin film thickness, relates to a metal vapor-deposited film using the film and methods for obtaining the film cast green sheet. [0002] This application claims the priority of Japanese Patent Application No. 2009-134613 for which it applied in Japan on June 4, 2009, and uses the content here. Background technique [0003] Biaxially oriented polypropylene film is widely used as an industrial material film including packaging, and in particular, it is also used as a dielectric film for capacitors due to its excellent electrical characteristics such as withsta...

Claims

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Application Information

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IPC IPC(8): C08L23/12H01G4/18B32B15/085
CPCC08F110/06H01G4/18C08J5/18C08J2323/12H01G4/145C08F2500/15
Inventor 石渡忠和松尾祥宜荒木哲夫宍户雄一
Owner OJI PAPER CO LTD
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