Method and apparatus for producing stretch wrap plastic film

Details Method and apparatus for producing stretch wrap plastic film Method and apparatus for producing stretch wrap plastic film

B - Operations, Transporting

29

C

B29C 55/02 (2006.01) A01F 25/13 (2006.01)

Patent

CA 2288903

The present specification discloses a plastics material film (1) that is stretched beyond its yield point to about 100 % to 400 % elongation and thereafter only partially relaxed to release part of the elastic deformation component in the film to retain between about 20 % and 80 % of the elastic deformation in the film (1), the film thereafter being stored in this partially relaxed state whereby, when it is used, the retained elastic deformation capability is useable for the intended purpose of the film, for example, wrapping a load.

La présente invention décrit un film en matière plastique (1). Ce film est étiré au-delà de son point d'élasticité jusqu'à obtenir un allongement compris entre 100 et 400 %, puis il subit ensuite une relaxation partielle pour libérer une partie de la composante de déformation élastique dans le film et retenir entre 20 et 80 % de la déformation élastique du film (1). Le film est ensuite stocké dans cet état de relaxation partielle, et lors de son utilisation, la capacité de déformation élastique retenue peut être utilisée pour remplir la fonction du film prévue, par exemple, pour envelopper une charge.

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