Conductive polypropylene resin foam sheet and receptacle
A polypropylene resin and polypropylene resin technology, which is applied in the field of conductive polypropylene resin foam sheet, can solve the problem that liquid crystal display elements are not recorded.
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Embodiment 1
[0028] 70% by weight of high melt tension polypropylene-based resin (manufactured by Monterres Day-Kaisan Lays Co., Ltd., PF-814), 30 wt. PL504A) and 4.0 parts by weight of a thermally decomposable foaming agent (manufactured by Clarionto, CF40E) as a foaming agent were mixed with respect to 100 parts by weight of the polypropylene-based resin. The high melt tension polypropylene resin described therein has a density of 0.90, a melt flow index of 3.0 g / min (measured value at 230°C: JIS-K 6758 method), and a melt tension at 200°C (manufactured by Toyo Seiki The capillary tester made by the company heats the polypropylene in the barrel of the device at 200°C for 5 minutes to melt it, and melts the molten polypropylene from a capillary with a diameter of 2.095 mm, a length of 8 mm, and L / D=3.8 at 15 mm / min. Extruded into the atmosphere at a speed of 2.0 m / min, the tension when stretching the strand) is 30.0 grams; the density of the linear crystalline polypropylene resin is 0.90,...
Embodiment 2
[0034] Using the same method as in Example 1, from 50% by weight of high melt tension polypropylene resin, 50% by weight of linear crystalline polypropylene resin, and 4.0 parts by weight relative to 100 parts by weight of the polypropylene resin Foaming agent, made of conductive polypropylene resin foam sheet. The density of the gained conductive polypropylene resin foam sheet is 400 kilogram meters -3 . When measuring the average cell diameter of the foam sheet with the same method as in Example 1, it was 198 microns in the extrusion direction, 143 microns in the direction perpendicular to the extrusion direction, and 68 microns in the thickness direction.
[0035] When the obtained conductive polypropylene-based resin foam sheet was molded into a tray by the same method as in Example 1, the formability was good, so a tray with a beautiful appearance was obtained.
[0036] The surface resistance of the tray is 6.5×10 6 Ω / □, in the same manner as in Example 1, the surface ...
Embodiment 3
[0038] A conductive polypropylene-based resin foam sheet was prepared in the same manner as in Example 1, except that only the conductive paint was coated on the foam sheet formed by film production. The density of the gained conductive polypropylene resin foam sheet is 370 kilogram meters -3 . When measuring the average cell diameter of the foam sheet with the same method as in Example 1, it was 178 microns in the extrusion direction, 130 microns in the direction perpendicular to the extrusion direction, and 40 microns in the thickness direction. When the obtained conductive polypropylene-based resin foam sheet was molded into a tray by the same method as in Example 1, the formability was good, so a tray with a beautiful appearance was obtained. The surface resistance of the tray is 7.0×10 5 Ω / □, in the same manner as in Example 1, the surface of the tray was rubbed with a glass plate at a corner at an angle of 90°, and the generation of grinding debris was investigated. G...
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