| 摘要 |
The invention relates to a device for drawing a film web, made from a thermoplastic plastic, comprising at least one driven roller ( 2 ), driven at a speed V 1 and at least one second driven roller ( 3 ), driven at a speed V 2, where V 1 <V 2. The rollers ( 2, 3 ) are serially arranged such that a drawing gap ( 4 ) is embodied between the two rollers ( 2, 3 ). A width-maintaining device is arranged in the drawing gap ( 4 ), which mechanically grips both edges of the film web such that the width of the film web is essentially maintained during the longitudinal drawing in the drawing gap ( 4 ). The invention further relates to a method for the longitudinal drawing of films which are drawn by means of said device.
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