Piezoelectric type abnormal sound prevention synthetic leather and preparation method thereof

Abstract

The invention belongs to the technical field of synthetic leather, and relates to piezoelectric type abnormal sound prevention synthetic leather and a preparation method thereof. The preparation method comprises the following steps of: sequentially impregnating or coating different slurries on the base cloth, introducing the functional powder and the piezoelectric powder with specific contents into the surface layer, and converting part of mechanical energy into internal heat energy by microscopic slippage and friction between the functional powder and the polyurethane resin during low-frequency friction vibration; during medium-frequency and high-frequency friction vibration, the piezoelectric powder converts mechanical energy into electric energy. The synthetic leather comprises a base cloth layer and a surface layer, the surface layer contains functional powder, and the content of the functional powder in the surface layer does not exceed 25wt%; the functional powder comprises piezoelectric powder, and the content of the piezoelectric powder in the surface layer is not lower than 10 wt%; and the piezoelectric powder is silver ion doped zinc oxide powder. According to the invention, the problem of insufficient inhibition of medium-high frequency abnormal sound in the prior art is solved, and the abnormal sound prevention effect of the synthetic leather is effectively improved.

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