Cloth-like polymeric film with directional tear

Details Cloth-like polymeric film with directional tear Cloth-like polymeric film with directional tear

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) B29D 7/01 (2006.01) B32B 3/24 (2006.01) B32B 7/14 (2006.01) C08L 23/12 (2006.01) C08L 67/02 (2006.01) C09J 7/02 (2006.01)

Patent

CA 2517514

A polymeric film having a plurality of perforations (31a, 31b, 32a, 32b), which are specially structured and arranged is described. The polymeric film provides a strong, high-tensile strength material that permits hand tearing of the film along a desired tear path, providing a controlled tear propagation line. The polymeric film may also be incorporated into a multi-layer film having cloth-like properties of strength and tear propagation, and is suitable for use various adhesive tape applications. Methods of making the polymeric film are also disclosed.

L'invention concerne un film polymère comprenant une pluralité de perforations (31a, 31b, 32a, 32b) structurées et disposées de manière spéciale. Le film polymère fournit un matériau robuste et à résistance élevée à la rupture, peut être déchiré à la main le long d'une ligne de déchirure souhaitée et présente une ligne de propagation de la déchirure commandée. Le film polymère peut aussi être incorporé dans un film à couches multiples possédant des propriétés de type étoffe de résistance et de propagation de déchirure et il est conçu pour être utilisé dans diverses applications de ruban adhésif. L'invention concerne également des procédés de fabrication du film polymère.

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