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CAT NO: DIDACTICNLE-Export-370004
Gelbo Flex Tester For Testing Lab Workshop.
Gelbo Flex Tester -
Gelbo Flex Tester is used for determination of flex resistance of
flexible barrier materials. Pinhole formation is the criterion presented
for measuring failure, but other tests such as gas transmission rate or
water vapour permeability can be used in place of the pinhole test. The
flexing action consists of a twisting motion, followed, in most cases,
by horizontal motion, thus, repeatedly twisting and crushing the film at
a specified frequency.
The Gelbo Flex Tester
for determination of flex durability of flexible barrier materials
consists of a pair of cylindrical mandrels for holding the test
specimen, an eccentric and link mechanism to give a movement of either
155 mm or 80 mm to one of the mandrels, arrangement to rotate the moving
mandrel during the initial part of the travel, a motor operated
arrangement to give motion to the eccentric at a specified frequency,
and a digital type pre set counter with infra red sensor and memory back
up to retain the count of total number of operating cycles in case of
power failure and to automatic stop the motor after the desired number
of operating cycles.
The test specimen is held on the
mandrels with the help of double sided adhesive tape. The axes of both
the mandrels are horizontal and coincide with each other. One of the
mandrels is held firmly during the test. Linear movement is given to the
moving mandrel with the help of an eccentric pin and link.
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