JP2005154145A5 - - Google Patents

Claims (8)

And a non-driven roller body, said covering the outer peripheral surface of the non-driven roller body, stretch a tubular knitted fabric having stretchability constituted by yarns comprising elastic yarns, the tubular knitting roller rotation axis direction A wrinkle-stretching roller for a web, characterized in that the roller is provided with a stretching means. The roller for wrinkle-stretching a web according to claim 1 , wherein the tubular knitted fabric is seamless. The expansion / contraction means includes an inclined collar that is disposed on both outer sides in the roller rotation center axis direction of the non-driving roller body and is configured to be rotatable about a rotation center axis that is inclined with respect to the roller rotation center axis. collar grips the tubular knit, together with the tubular knitted fabric is intended to constitute the envelope body which surrounds the non-driven roller body, and the tubular with the rotation about the central axis of rotation The wrinkle-stretching roller for a web according to claim 1 or 2, wherein each portion of the knitted fabric is expanded and contracted in the direction of the central axis of the roller rotation. An apparatus for producing a film roll body, comprising the web wrinkle-stretching roller according to any one of claims 1 to 3 in at least one place on a plastic film conveyance path. And the web of wrinkles stretched roller according to any one of claims 1 to 3 has a winding roller for winding the film, can be pressed against the facing said web of wrinkles stretch rollers is relative to the take-up roller A film take-up device characterized by being made. The manufacturing method of the film roll body using the apparatus of Claim 4 or 5 . The method for producing a film roll body according to claim 6, wherein a polyester yarn is used as the outermost layer cover yarn as the elastic yarn, and a multilayer structure yarn using polyurethane fiber as the core yarn is used. The manufacturing method of the film roll body of Claim 6 or 7 which uses the roller for the wrinkle extending | stretching of the said web in the pressure-reduced atmosphere.