Testing items for stretch film


Wrapping film, also known as stretch film, is a new type of industrial packaging film products. It is characterized by light, soft and thin, good tensile properties, elongation properties and self-adhesive properties. Its application in transportation packaging is a packaging method that improves packaging efficiency and saves costs. In order to ensure the production quality of packaging stretch film, manufacturers need to produce according to certain standards.


We, CELL INSTRUMENTS, has presented below testers for stretch film testing.


1. Thickness measurement

Cut the entire sample of 100mm along the length direction, measure 20 points after standing for 30min, the reading is accurate to 0.001mm, and take the arithmetic mean value.


Film Thickness Tester FTT-01


2. Tensile force and elongation at break, according to ASTM D882
Samples are cut to a width of 15mm. The sample should be cut after unwinding roll for 1m, and cut evenly at approximately equal intervals along the length or width of the sample. Set the TST-01 tensile testing machine gauge length to 50mm, and the test speed is 250mm/min±25mm/min. There are two sets of vertical and horizontal sets, each set of samples shall not be less than 5, and the arithmetic mean value shall be taken, accurate to 0.1N.

Tensile Tester TST-01


3. Peel Cling Force test according to ASTM D5458
Sampling begins after the test sample is unrolled 1m, and the samples are divided into two groups of 500mm×125mm (vertical×horizontal) and 180mm×25mm (vertical×horizontal). After the sample is successfully clamped according to the method specified in the standard, pull the clamp at a speed of 125mm/min±12.5mm/min until the two samples are separated, record the maximum force value during the separation process, and the reading is accurate to 0.1N.

Stretch Film Peel Cling Tester SPC-01


4. Protrusion Puncture Resistance test according to ASTM D5748
The ASTM D5748 protrusion puncture resistance test is realized on CELTEC TST-01 tensile tester, with the special probe and sample clamps with certain test area.

Fix the sample in sample clamps required. Start the tester and test the puncture needle at a speed of 250mm/min±12.5mm/min, and the test will stop when the puncture probe passes through the film completely. If the film is broken at other positions, the sample shall be discarded. Record the rupture force (N) and elongation (mm) of the sample when it ruptures.



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