| 摘要 |
Elongated apertures each having a major axis and a minor axis, are formed in a stretchable film having a predefined direction of stretch. The apertures are oriented in the film with the major axes of the apertures disposed perpendicular to the predefined direction of stretch. The apertures are also disposed in the film with greater separation between the apertures in the direction parallel to the major axes of the apertures than the separation between adjacently disposed apertures in a direction parallel to the minor axes of the apertures. The elongated openings, when positioned with the major axes perpendicular to a predefined direction of stretch, has better breathability and elastic properties than comparable symmetric aperture shapes when both are subjected to cross direction elongation. |
