1. Application
The flex durability tester is used to measure the resistance against repetitive strain for films,
composites and coating films, etc. Flex failure is determined by measuring the pinholes formed
in the sample structure. It is also called Gelboflex.
Good flex crack resistance will reduce the propensity of the package developing holes during the
distribution cycle thereby destroying the package integrity.
Standard: ASTM F392, "Flex durability of flexible barrier materials".
● PLC control and HMI touch screen operation
● 5 standard test modes and 3 test stations
● Long and short stroke fast switching
● Condition A,B,C,D and E can be chosen
GFT-02 Flex Durability Tester
Sampling and motion
The sample size (200 by 280 mm) is attached to the flex tester mandrels. The flexing action
consists of a twisting motion combined with a horizontal motion (compression), thus repeatedly
twisting and crushing the film. The test set up gives a twisting motion of 440º in the first 90 mm
of the stroke and is followed by a straight horizontal motion of 65 mm. The speed is 45 cycles
per minute.
The flexing action consists of a twisting motion combined with a horizontal motion repeatedly
twisting and crushing the film. There are 5 pre-programed test conditions to choose from:
Mode A– Full flex for 1 hour (2,700 cycles),
Mode B– Full flex for 20 minutes (900 cycles),
Mode C– Full flex for 6 minutes (270 cycles),
Mode D– Full flex for 20 cycles,
Mode E– Partial flex for 20 cycles.
Flex Frequency 45 /minute
Flex Angle 440° (90 mm) or 400° (80 mm)
Horizontal Stroke 155 mm or 80 mm
Stations 3
Sample Size 280 mm x 200 mm
Power 220V
Capacity 3.5 N.m
Main Parameters
Technical Features
A four station model
GFT-01 available
Feel free to contact us
yang@celtec.cn
www.celtec.cn
Whatsapp/wechat:+86 18560013985