Curvature of films
This method is used to measure the curvature of a flat film in relation to the longitudinal direction. This so-called curvature can be the result of an aslope bubble during the blown film process, for example. The film then tends to have lobed edges on the reels or to wrinkle during lamination. We will be happy to send you our test specification on request.
In short — AI-generated
This test measures the curvature of a flat film relative to its longitudinal direction. A sample strip is placed on a flat surface to determine the deviation from a straight line, which quantifies the film's tendency to curve.
The resulting value indicates whether the film was produced with an uneven tension, such as an aslope bubble during the blown film process. This information helps predict potential processing issues, such as lobed edges on reels or wrinkling during lamination.
Text is AI-generated; based on test method data curated and verified by Innoform.