Multi-layer composite for acoustic membranes

US10397705B2 · kind B2 · utility

Assignee

• tesa SE · DE

Inventors

• Michael Egger · Hamburg, DE
• Gero Maatz · Hersbruck, DE

Key dates

• Filing date: Nov 17, 2015
• Grant date: Aug 27, 2019
• Expiry date: Nov 17, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04R2499/11
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Multi-layer composites and methods of using the composites as a membrane for electroacoustic transducers. The composites and methods comprise at least one first and one second outer layer, wherein at least one of the cover layers being made from a polypropylene sulfide-plastic having a halogen content not exceeding 550 ppm.