Patent ID: 6918559
Filing Date: 2005-07-19
Classification: B26D,B65H,H01M,Y02E,Y10T

Abstract:
1. A slitting method for manufacturing a battery separator-use resin film object comprising the steps of: providing a slitting device comprising a feeding roll for feeding a film object from a scrolled film object with its rotational velocity being controlled; a slitting blade for slitting said film object so as to have a predetermined width; a sensor for detecting a tension of said film object and a wind-up roll for winding up said film object while controlling the tension of said film object, and slitting said film object by using said slitting device in a manner so as to satisfy the following conditions 1 and 2: where L is a thickness (m) of said film object, R is a rotational velocity (m/min) of said feeding roll and T is a tension (N/m) of said film object after having been subjected to the slitting operation.