Bestech Australia has introduced two test jigs for its LFPlus 1 kN single column materials testing machine from Lloyd Instruments. The TG1075 is used for testing puncture resistance, while the TG1167 is used for testing peel cling.
Peel cling and puncture resistance are important parameters since cling is critical in maintaining a tight wrap after an item is stretch wrapped, while puncture strength is important with regards to preventing accidental puncture damage.
The TG1075 features a probe and a jig containing a 102 mm aperture to support the stretch wrap film. The jig is locked onto the base of the LFPlus using the machine anchor pin and a removable upper plate allows the film to be mounted and clamped onto the jig, with the probe fitted to the bottom of the load cell. The puncture resistance test method imparts a biaxial stress to determine the resistance of film to the penetration of a probe at a single constant test speed of 250 mm/min.
For peel cling measurements, the TG1167 jig is fitted to the LFPlus. A film strip is adhered to a flat film attached to an inclined surface on the peel jig. The force required to remove the film strip from the flat film is measured.