| 摘要 |
Disclosed are deep-drawn membranes made of cast polyarylate films, at least comprising a polyarylate (PAR) having a structural unit of formula (I), in which R<1>, R<2>, R<3>, and R<4> independently present hydrogen, C1-4 alkyl, C1-4 alkoxy, or halogen while R5 and R6 independently represent hydrogen, C1-4 alkyl, C1-4 alkoxy, phenyl, or halogen. Also disclosed is the use of deep-drawn membranes made of cast PAR films as sound transducers, preferably as microphone or loudspeaker membranes. The invention further relates to cast PAR films for producing said membranes, cast PAR solutions for producing the cast PAR films, and methods for producing deep-drawn membranes made of cast PAR films and for producing cast PAR films. |
