| 摘要 |
<p>The invention relates to a multi-layered laminate for producing membranes for electroacoustic transducers, comprising a first layer (3) consisting of a polyether ether ketone film having a heat of crystallisation of at least 15 J/g, determined in the first heating curve of the dynamic differential calorimetric measurement, a second layer (1) consisting of a thermoplastic plastic film having a heat of crystallisation of no more than 5 J/g, determined in the first heating curve of the dynamic differential calorimetric measurement, and an adhesive layer (2) arranged between the first (3) and second (1) layers. Alternatively, the first (3) and second (1) layers are defined by their shrinkage properties after 15 minutes at 200 °C: the first layer (3) has shrinkage of more than 10% in at least one direction, and the second layer (1) has shrinkage of less than 10% in the longitudinal and transverse directions. A laminate constructed in this manner is characterised by lower fold formation when said laminate is processed using multi-cavity thermoforming.</p> |
