Title:
The asymmetrical multilayer film for electroacoustic transducers
Document Type and Number:
Japanese Patent JP6148726
Kind Code:
B2
Abstract:
A multi-layered laminate for producing membranes for electroacoustic transducers, comprises a first layer of a polyether ether ketone film having a heat of crystallisation of at least 15 J/g, a second layer (of a thermoplastic plastic film having a heat of crystallisation of no more than 5 J/g, and an adhesive layer arranged between the first and second layers. Alternatively, the first and second layers are defined by their shrinkage properties after 15 minutes at 200° C.: the first layer has shrinkage of more than 10% in at least one direction, and the second layer has shrinkage of less than 10% in the longitudinal and transverse directions. A laminate constructed in this manner exhibits lower fold formation when processed using multi-cavity thermoforming. The laminates are useful for the production of membranes for electroacoustic transducers.
Inventors:
Musich bernhard
Tape Järitz
Egger Michael
Tape Järitz
Egger Michael
Application Number:
JP2015513067A
Publication Date:
June 14, 2017
Filing Date:
April 25, 2013
Export Citation:
Assignee:
Theza Societas Europe
International Classes:
H04R7/10; B32B27/00; H04R7/02; H04R31/00
Domestic Patent References:
| JP2006295245A | ||||
| JP2009154296A | ||||
| JP2012081748A | ||||
| JP1174100A | ||||
| JP2011166210A |
Foreign References:
| WO2012018099A1 |
Attorney, Agent or Firm:
Mitsufumi Esaki
Blacksmith
Katsunori Uenishi
Ichiro Torayama
Blacksmith
Katsunori Uenishi
Ichiro Torayama
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