Fibrillated weatherproof webs having network structure,...

Details Fibrillated weatherproof webs having network structure,... Fibrillated weatherproof webs having network structure,...

B - Operations, Transporting

32

B

18/542

B32B 5/22 (2006.01) B29D 28/00 (2006.01) B32B 27/08 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2000889

Disclosed herein is a fibrillated weatherproof web having a network structure, which can be produced with ease and is economical. The web comprises a multilayer composite film composed of at least two layers, one being a first layer (I) made of a first thermoplastic resin and the other a second layer (II) made of a second thermoplastic resin having a melting point lower than the first thermoplastic resin and containing at least 300 ppm of a light resistance imparting agent. A number of slits have been formed in a longitudinal or transverse direction. The web has been oriented at a draw ratio in a range of from 1.1 to 15 times. A nonwoven fabric making use of one or more fibrillated webs of the above sort and processes for the production of the web and nonwoven fabric are also disclosed.

L'objet de la présente invention est une toile fibrillée résistant aux intempéries et possédant une structure en réseau, qui est économique et peut être fabriquée facilement. La toile comprend un film composite multicouche composé d'au moins deux couches, la première (I) faite d'une première resine thermoplastique et la deuxième couche (II) faite d'une deuxième résine thermoplastique ayant un point de fusion inférieur à celui de la première résine thermoplastique et contenant au moins 300 ppm d'agent lui conférant une résistance à lumière. Un certain nombre de fentes ont été formées en sens longitudinal ou transversal. La toile est orientée selon un rapport d'étirement de 1.1 à 15 fois. L'invention a également pour objet un non tissé faisant usage d'une ou de plusieurs toiles fibrillées, de fabrication et de type ci-dessus décrits, pour la fabrication de la toile et du non tissé.

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