Pre-perforated stretch film and method

A method of perforating stretch film for tightly wrapping a load, the method comprising:

• extruding a stretch film using either a cast film or a blown film extrusion process, wherein the stretch film is configured to stretch by at least 100% and maintain a compressive force on the load when the load is wrapped with the stretch film;
• passing the stretch film over a first idler roller;
• moving the stretch film in a first direction towards a perforation roller, wherein the perforation roller comprises a center axle and a plurality of perforation rings positioned on and axially aligned with the center axle, wherein each of the plurality of perforation rings is configured to perforate the stretch film when the stretch film passes over the plurality of perforation rings, each of the plurality of perforation rings having:
• an outer ring having a plurality of pinholes extending therethrough, wherein the plurality of pinholes are spaced apart around a circumference of the outer ring;
• a plurality of pins having tapered ends configured to extend through the plurality of pinholes, wherein each of the plurality of pins has a stem with a maximum diameter larger than a minimum diameter of the plurality of pinholes;
• and
• an inner ring configured to sit inside of the outer ring and hold the plurality of pins in an extended position with the tapered ends of the plurality of pins extending through the plurality of pinholes;
• perforating the stretch film with the perforation roller as the stretch film passes over the perforation roller;
• moving the perforated stretch film in a second direction away from the perforation roller, wherein an angle between the first direction and the second direction is at least 150 degrees;
• passing the perforated stretch film over a second idler roller;
• and
• wrapping the perforated stretch film about a core to form a roll of perforated stretch film.