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Precision Acoustics

Aptflex F7

A two-part, highly-flexible, high performance encapsulation material, exhibiting excellent hydrolytic stability and an acoustic wave speed similar to that of fresh water.

If you have any specific questions about this product, please contact us.

aptflex f7 with sample

Overview

Aptflex F7 is a highly flexible, high performance encapsulation material, exhibiting excellent hydrolytic stability and an acoustic wave speed and acoustic impedance similar to that of fresh water. It also has the lowest insertion loss and absorption of all encapsulants from Precision Acoustic Ltd

These properties make Aptflex F7 an ideal system for hydrophone windows, marine encapsulation applications or as strain reliefs around cable glands and cable repairs.

It is particularly useful where small, delicate components are being potted since the material exhibits low shrinkage and hence stress during the cure phase.  The high flexibility means that F7 is not as tough and durable as other encapsulants.

Key Features

  • Flexibility and resistance to temperature extremes of -50°C to 100°C
  • Low moisture sensitivity during the cure phase
  • Excellent hydrolytic stability
  • Excellent electrical insulation properties
  • Acoustic wave speed similar to that of freshwater
  • Very low insertion loss

Technical Specifications

Appearance Natural (straw colour) or Black
Density Part A 0.91g/ml
Density Part B 1.22g/ml
Mix Ratio 6:1 (By Weight A:B)
Cured Density 0.965g/ml
Initial Mixed Viscosity 70 poise at 25°C
Usable Life 25 minutes at 25°C
Gel Time 60 minutes at 25°C
Curing times*: 48 hours at 30°C 16 hours at 50°C 10 hours at 80°C
Hardness 50-55 Shore A
Tensile Strength 3.0 MPa
Elongation at Break 300%

*Curing Times are temperature dependant.  Precision Acoustics reserves the right to change the specification without notice

The shelf-life of unopened containers is at least 12 months.

IMPORTANT

This product is subject to Dangerous Goods Movement control.

Please note this will typically incur an additional £270.00 surcharge for shipments outside the UK.