Organic-inorganic composite film, and multi-layer heat resistant separator material using same
An inorganic composite membrane, organic technology, applied in the direction of synthetic resin layered products, separators/films/diaphragms/spacers, coatings, etc. The effect of good resistance and high heat resistance
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preparation example Construction
[0079] (Preparation of heat-resistant layer agent)
[0080] The inorganic heat-resistant layer agent is prepared by mixing and stirring the above-mentioned inorganic heat-resistant particles, binders, solvents, additives and other raw materials. As long as the inorganic heat-resistant particles are uniformly dispersed in the inorganic heat-resistant layer agent, the mixing and stirring mechanism is not limited. Typically homogenizers or bead mills, and jet mills are used.
[0081] [Manufacture of organic-inorganic composite membrane]
[0082] A heat-resistant layer agent is applied to at least one side of the base film. The application mechanism is not limited. For example, any one of a gravure coater, a micro-gravure coater, a die coater, a knife coater, and the like can be used as long as it is a mechanism for coating a liquid into a flat film. Thereafter, the base film with the heat-resistant layer agent was conveyed to a dryer, and the heat-resistant layer agent was dr...
Embodiment 1
[0110] (Manufacture of substrate film)
[0111] (Raw material) As a raw material, a propylene homopolymer having a melt flow rate (MFR) of 0.5 g / 10 minutes and a melting point of 165° C. measured in accordance with JIS K6758 (230° C., 21.18 N) was used. (Film production) The raw material melted and kneaded by the single-screw extruder was extruded from a T-die at a draft ratio of 206 to produce a raw film. (Heat treatment) The original film was cold-stretched to 1.03 times in the longitudinal direction at 30°C. (Thermal stretching) The obtained stretched film was thermally stretched 2.8 times in the longitudinal direction at 230°C. (Loosening) The obtained stretched film was relaxed so that the length thereof became about 90% of the original length. Thus, a substrate film having a thickness of 20 μm was obtained. The air permeability of the obtained base film was 240 sec / 100 ml.
[0112] (Preparation of heat-resistant layer agent)
[0113] Silica (AEROSIL MOX80, average p...
Embodiment 2
[0126] (Manufacture of substrate film)
[0127] The stretching conditions in Example 1 were adjusted so that the thickness of the base film was 21 μm.
[0128] (Preparation of heat-resistant layer agent)
[0129] A heat-resistant layer agent was prepared under the same conditions as in Example 1 except that diaspore (Daiming Chemical C01, average particle diameter: 0.1 μm) was used as the inorganic heat-resistant particles.
[0130] (Manufacture of organic-inorganic composite membrane)
[0131] A heat-resistant layer agent was applied to one side of the base film by a gravure coater. The weight per unit area of the heat-resistant layer is 4.1g / m 2 . The base film with the heat-resistant layer agent was transferred to a drying oven at a temperature of 95° C., and the heat-resistant layer agent was dried and cured. The thickness of the heat-resistant layer was 3.2 μm, and the thickness of the entire film was 24.2 μm. An organic-inorganic composite film was thus obtained....
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