The texture analyzer was also used to test the puncture strength
of the films. In this test, a 5 mm ball probe was used to puncture
the uncut films. The test speed was 10 mm/s and the trigger force was
5 g. The force, distance andwork to puncture the filmswere determined
fromthe generated force–distance graph. Again, a total of eighteen films
were tested for each of the treatments (six films per trial). The average
of the six measurements was taken for each of the three separate trials
and used for statistical analysis.