Description

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 transmission 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%