Film for flexible flat cable reinforcement plate
A flat cable and reinforcing plate technology, applied in the direction of flat/ribbon cable, insulated cable, cable, etc., can solve the problem of undocumented polyimide film, etc., to suppress or prevent warping, improve flame retardancy, reduce effect of bubbles
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Embodiment
[0159] Next, the present invention will be described in more detail by giving examples, but the present invention is not limited by these examples, and a person having ordinary knowledge in the field can make many modifications within the technical idea of the present invention.
[0160] [thickness measurement]
[0161] It measured as follows using the Litematic (Series 318) thickness gauge manufactured by Mitutoyo. That is, five locations were arbitrarily selected from the entire surface of the film, the thicknesses of the five locations were measured, and the average value thereof was calculated as the thickness.
[0162] [ring stiffness value]
[0163] Using the ring stiffness tester DA manufactured by Toyo Seiki Seisakusho, under the conditions of ring length 50mm and compression distance 10mm, the ring stiffness value was obtained (see figure 1 ).
[0164] [Heat shrinkage rate of polyimide film]
[0165] The thermal shrinkage rate of the polyimide film after heating...
Embodiment 2
[0191] Except for the Toray DuPont "kapton" 200H (50 μm thick, heat shrinkage rate after heating at 200°C for 60 minutes: 0.03 (%)) and 400H (100 μm thickness, heat shrinkage rate after heating at 200°C for 60 minutes: 0.03 (%) %))), a polyimide film laminate was obtained by the same procedure as in Example 1. The polyimide film laminate had a thickness of 175 μm and a ring stiffness of 1630 mN / cm.
[0192] Various evaluations were performed in the same manner as in Example 1 using this polyimide film laminate. There was also no deformation of the stiffener in the high-temperature test, and the conductors of the flexible flat cable were in firm contact with the conductors of the test wiring board. In the bending test, the conductors of the flexible flat cable and the conductors of the test wiring board are firmly in contact even when an external force is applied.
Embodiment 3
[0194] Except for the Toray DuPont "kapton" 300H (75 μm thick, thermal shrinkage rate after heating at 200°C for 60 minutes: 0.03 (%)) and 500H (125 μm thick, thermal shrinkage rate after heating at 200°C for 60 minutes: 0.03 (%) %))), a polyimide film laminate was obtained by the same procedure as in Example 1. The polyimide film laminate had a thickness of 225 μm and a ring stiffness of 3550 mN / cm.
[0195] Various evaluations were performed in the same manner as in Example 1 using this polyimide film laminate. There was also no deformation of the stiffener in the high-temperature test, and the conductors of the flexible flat cable were in firm contact with the conductors of the test wiring board. In the bending test, the conductors of the flexible flat cable and the conductors of the test wiring board are firmly in contact even when an external force is applied.
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Abstract
Description
Claims
Application Information
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