|Hanatek Film Shrink tester FST
The Hanatek FST is used to measure the effect
of temperature on plastic films. The application
of heat causes certain plastic films to rapidly
contract; this effect can be used to seal and
pack many items from food to consumer goods.
The shrink effect is due to internal forces
locked into the film during manufacture being
released by heating, it is also known as linear
thermal shrink or free shrink.
The amount of shrinkage is dependent on the
film type, thickness and sealing temperature.
Testing the percentage shrink of a film ensures
that it is suitable for a particular packaging
application and establishes the correct
temperature for that application.