Amcor Nylon-Based Films Address Damage
Published: October 12th, 2011
For higher levels of package protection, Amcor Flexibles (www.amcor.com) offers its Buried Nylon (BNE) films. The films are suitable for a range of applications including packaging of syringes, IV sets, IV canulae, dressings, and drapes.
In the BNE films, the nylon layer imparting toughness and abrasion resistance is sandwiched between polyolefin skins.
“We have found this structure is a very effective way of enabling the film to have good resistance to damage,” say Neil Hawkesford, coextruded films product manager, Amcor Flexibles.
In the cast co-extrusion process at Amcor’s Winterbourne, UK facility, ratios of film materials and film gauges can be flexibly set to meet customers’ requirements, with film gauges ranging from 50 to 200 microns.
The forming films can be paired with Amcor Direct Seal papers, Amcor Grid Coated papers, or coated Tyvek. The uncoated Direct Seal papers are specifically designed to work with the sealing layer of a specified film, and the packaging machine processing conditions. Paper porosity values are set to match the customer’s requirements for ETO sterilization.
The paper/BNE structure has a processing window, dependent on dwell time and pressure, of 140°C to 160°C. Upon package opening, a visible impression of the paper is left on the package as the interface between the film and the paper fails, Hawkesford says.
Grid Coated papers leave a more distinct mark after peeling, and support a seal temperatures as low as 120 C.
“By moving to a coated paper you get a wider sealing window, but then also you are moving to a more expensive product,” Hawkesford says.