Flame retardant adhesive composition, and adhesive sheet, coverlay film and flexible copper-clad laminate using same
A technology for covering films and compositions, applied in the direction of adhesive types, film/sheet adhesives, lamination, etc., can solve the problem of poor migration resistance, expensive nitrile rubber, and materials that are impossible to use on a large scale and other problems, to achieve the effect of good flame retardant performance
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[0134] [Example 1]
[0135] Combine each component of the adhesive composition according to the ratio shown in the column of Example 1 in Table 1, and then add a mixed solvent of methyl ethyl ketone and dioxolane to the resulting mixture to obtain an organic solid component and an inorganic solid component. The total concentration of the dispersion is 35% by mass.
[0136] The above dispersion was applied to the surface of polyimide film A (trade name: Kapton H, manufactured by DuPont Toray Co., Ltd., thickness: 25 μm) using an applicator, and the applied amount was sufficient to make the coating thickness after drying The thickness is 10 μm, and then the coating layer is dried in a forced-air oven at 120° C. for 10 minutes to change the composition to a semi-cured state. Then the surface of the dispersion-coated polyimide film A and the surface of the rolled copper foil were bonded together by thermocompression bonding using a roll laminator at 120°C and a linear pressure of 2 kg...
Example Embodiment
[0137] [Example 2]
[0138] A flexible copper-plated laminate was prepared in the same manner as in Example 1, except that each component of the adhesive composition was combined in the ratio shown in the column of Example 2 in Table 1. The characteristics of the flexible copper-plated laminate were also measured in accordance with Test Method 1 below. The results are shown in Table 1.
Example
[0139] [Comparative Examples 1 and 2]
[0140] A flexible copper-plated laminate was prepared in the same manner as in Example 1, except that each component of the adhesive composition was combined in the ratio shown in the columns of Comparative Examples 1 and 2 in Table 1, respectively. The characteristics of the flexible copper-plated laminate were also measured in accordance with Test Method 1 below. The results are shown in Table 1.
[0141] 【Test Method 1】
[0142] 1-1. Peel strength
[0143] The peel strength is measured in accordance with JIS C6481 by forming a circuit with a 1mm width pattern on a flexible copper-plated laminate, and then measuring the copper foil ( The above circuit) is the minimum force required for peeling at a speed of 50 mm / min, and this measured value is used as the peel strength.
[0144] 1-2. Soldering heat resistance (normal conditions)
[0145] The soldering heat resistance was measured in accordance with JIS C6481 by cutting a 25mm square from ...
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