Vamp Flex Tester Low Temperature Model For Testing Lab Description and Specifications for Lab Tenders
Vamp Flex Tester Low Temperature Model For Testing Lab Workshop.
Vamp Flex Tester Low Temperature Model - For Testing Lab
The Vamp Flex Tester is used for assessing the tendency of
shoe uppers and lining materials to crack or fail at the flexing creases
formed in the upper during walking.
In this test,
square shaped test specimens are held at their opposite edges in two
inverted V-shaped clamps having their holding faces in the same plane.
One of the clamps is kept fixed while the other is made to move towards
it and back repeatedly, producing cracks similar to those formed in the
vamp of the shoe. This process is repeated continuously and the
condition of the test specimens checked after different specified number
of flexing cycles till failure occurs. For conducting resistance to
hydrolysis the test specimens are conditioned in saturated water vapour
atmosphere by keeping them in a dessicator above water for seven days at
70°C, followed by conditioning under a standard temperature for 24
hours before conducting the flexing test at -5°C.
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