Figure 11 Zip tie dimensions
It is recommended that:
• the zip tie is located on a flap that is ≤ 40mm wide, as illustrated in Figure 10 and • the zip tie is positioned ≥ 9mm from the edge of the flap, as illustrated in Figure 10.
Figure 10 Perforation positioning
It is recommended that: • all cuts and bridges are of uniform size; • the cuts are rectangular in shape and have a width of ≤ 0.1mm; • the glue used to seal the flap does not run out onto the outside of or produce protruding mounds on the Mailing Item; • the glue is fully cured before you handover your mailing to us; and • the tensile strength of the glue must be ≥ 0.4N and fibre tear should be exhibited on separation. 12.6 Flexibility It is recommended that Mailing Items are flexible enough to be capable of being processed in our sorting machines without damage to the machine, the Mailing Item, or other Mailing Items. Each Mailing Item should therefore be capable of being transported around a pulley with a radius of 140mm with a maximum force of 26 Newtons. Items that are too stiff will not be able to meet this recommendation, as illustrated in Figure 12.
The dimensional for the cut of the zip tie are provided in Figure 11.
Figure 12 Flexibilty
12.7 Window Envelopes – General
• strength – the window is robust enough not to become deformed. It should be fixed to the envelope evenly across the surface area it is in contact with; and • location – it is recommended that only one window (two at maximum) appears on the front of the Mailing Item and that the window(s) do(es) not take up more than 50% of the surface area of the surface area.
It is recommended that: • gloss – the maximum gloss value of the window material is 150 when measured at 60º in accordance with ASTM 2457 ‘Standard Test Method for Specular Gloss of Plastic Films’; • haze – the window haze should not exceed 75% in accordance with ASTM D1003 ‘Standard Test Method for Haze of Plastic Films;’
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