| 摘要 |
<p>A packaging article (404) comprises a heat-shrinkable multilayer film having a first heat seal (412) extending down a length of the packaging article along longitudinal edges of the film, a second heat seal (414) extending across a width of the packaging article and providing a bottom of the internal volume within the packaging article, and a third heat seal (416) extending across the width of the packaging article and providing a top of the internal volume. The packaging article also comprises a skirt (408) between the second heat seal and the bottom edge of the article. The skirt has first and second tear initiators (423, 425) which are cuts through the skirt, with each of the first and second tear initiators having an inward end and an outward end. The inward ends are closer to both the first heat seal and the second heat seal than are the outward ends, and the outward ends are closer to the bottom edge than are the inward ends. The tear initiators are positioned relative to the first heat seal so that a superimposed straight line extending through the inward and outward ends of each tear initiator intersects a superimposed straight line extending through the ends of the first heat seal at a lesser included angle of from 25 degrees to 55 degrees, with the inward end of each the first and second tear initiators terminating at a location which is from 3 to 30 millimeters from the first heat seal and 3 to 50 millimeters from the second heat seal. The heat-shrinkable film exhibits an Elmendorf tear strength of from 0.7N to 2N after shrinking.</p> |
