Flex Durability Tester for Barrier Film Gelbo Flex Testing Instrument

GFT-01 Flex Durability Tester

Background
Flexible barrier materials must endure repetitive strain, known as flex durability or Gelboflex resistance. Strong flex crack resistance is crucial to reduce the risk of package perforation during distribution, ensuring package integrity.

Application
The flex durability tester, or Gelboflex, evaluates films, composites, and coating films' ability to withstand repetitive strain. It identifies flex failure by detecting potential pinholes in the sample structure. Excellent flex crack resistance is essential to minimize package holes during distribution, maintaining package integrity and preserving contents.

Standards
Conforms to ASTM F392 "Flex durability of flexible barrier materials".

Sampling and Motion
The flex tester affixes a 200 by 280 mm sample to the mandrels. It applies a combination of twisting and horizontal compression repeatedly to the film. The motion involves a 440-degree twist within the first 90 mm, followed by a linear horizontal motion of 65 mm. Operating at 45 cycles per minute, users can choose from five pre-programmed test conditions:

- 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

Technical Features
The system features PLC control with an intuitive HMI touch screen interface, offering five standard test modes and four test stations. Users can easily switch between long and short stroke modes, with selectable test conditions A, B, C, D, and E. Additionally, the system includes a microprinter for convenient data output.

Main Parameters
Flex Frequency 45 /minute
Flex Angle 440° (90 mm) or 400° (80 mm)
Capacity 2.5 N.m
Horizontal Stroke 155 mm or 80 mm
Stations 4
Sample Size 280 mm x 200 mm
Power 110~220V