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Evaluation of flatness, curvature and wrinkling of plastic films - strip method

A 2.54 m (100 inch) long sheet (film section) is cut into 50.4 (2 inch) wide strips. A lack of flatness or possible curvature, which can lead to wrinkling of the web, is indicated by any differences in length of the individual strips compared to the original total length of the tested film section of 2.54 m (100 inches).

test method:Mechanical/ technological properties
Norms: ASTM D 1604 (zurückgezogen) (1963 (Reapproved 1975))
Needed sample size:min. 3 linear meters of the film without kinks, damages etc.

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