Sound Permeable Waterproof Filter

Functional film with stable air/sound permeability and waterproof property, achieves waterproof ratings of IPX7 and IPX8 for mobile device cases.


  • Provides IPX7/8 waterproof level for mobile cases
  • Selections of products acording to purposes or needed
  • Complies with RoHS and REACH

Various Usage

Can be used as sound permeable waterproof film or internal/external pressure coutrol filters of mobile phones, smart phones and digital cameras.


Parameter Unit S3K30NW S3K3001
Film thickness μm 30 30
Water resistance kPa 50 80
Air permeability sec/100cm2 12 11
Strength at break N/inc 2.7 1.7
Elongztion at break 250 64
100% modulus N/inc 1.0 Broken
10% modulus N/inc 0.2 0.7
Adhesion to waterproof tape N/inc Film broken Film broken
Water resistance Pursuant to JIS L 1092 Test Method for Water Resistance of Textiles(Hydrostatic Pressure Test), Method B(High Water Pressure) *Using mesh cover
Air permeability Pursuant to JIS L 1096, Method B(Gurley Test Method)(equivalent to JIS P 8117, Method B)

This was measured by the method specially developed by Seiren for the measurement of the parameter with an sample opening of 1.2mm×2.0mm. (The measurement was made under an open system where the film underwent increased sound permeation loss in the low frequency range due to sound diffusion.)

※The data in the graphs are their reference values, not their guaranteed values.


Should be offered by parts. You can set shapea and materials as your demand.

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