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