Verfahren zur Herstellung von Rollen aus Laminatstreifen mit Polarisationsfolie

Details

Veröffentlichungs-Nr.

EP2426529

Aktenzeichen

EP11179967

Anmeldetag

2. September 2011

Veröffentlichung

10. April 2013

Erteilung

10. April 2013

Rechtsraum

EP

IPC

B26D1/15B32B41/00G02B5/30B32B38/00B26D1/03

Abstract

Provided is a method of producing a roll of an optical film laminate strip. The method comprises the steps of: forming an optical film laminate which comprises an optical film having a continuous web of polarizing film, and a resin film bonded to the optical film; creating a reference mark to extend across the optical film laminate in a width direction thereof, in a line pattern or a dot pattern consisting of a plurality of dots, while feeding the optical film laminate in a length direction thereof; performing a defect inspection for detecting a defect existing in the optical film, while feeding the optical film laminate in the length direction, and, when a defect is detected, recording a position of the defect in the form of a laminate widthwise position and a laminate lengthwise position as measured from the reference mark; cutting the optical film laminate along a direction parallel to the length direction to form a plurality of continuous webs of laminate strips each having a given width; based on the widthwise position of the defect detected by the defect inspection, determining which of the cut laminate strips has the defect, and, with respect to a specific laminate strip which is determined to have the defect, storing information about the defect together with identification information for identifying the specific laminate strip; and winding each of the laminate strips into a roll.

Anmelder

Firma

Nitto Denko Corporation

Land

🇯🇵 Japan

Fachgebiete