abstract |
A laminate comprising a piezoelectric polymer containing an optically active aliphatic polyester (A) having a weight-average molecular weight of 50,000 to 1,000,000, and a layer (X), and The crystallinity obtained by the DSC method is 20% to 80%, the layer (X) is in contact with the polymer piezoelectric body, and has an acid value of 10 mgKOH/g or less. |