Dimple Testing of Heavy Duty Sack Films, 2014 PLACE Conference

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Traditionally, resin suppliers have relied on physical property testing of films or plaques to determine a resin’s suitability for a given application. Today suppliers are being challenged to develop innovative test methods to look at application specific properties of finished films. This paper will focus on heavy duty shipping sacks where high-end printing and surface appearance can be critical features of the bag. Hard-edged products such as rock salt or dry dog food pellets can cause indentations or dimpling of the bag surface, resulting in a less attractive package on the shelf. The resin attributes that will help prevent dimpling in a bag cannot be easily correlated to conventional property data.