광학 필름의 제조 방법

• Main Authors: SHINAGAWA MASASHI, MIYAZAKI MAKOTO
• Format: Patent
• Language: Korean
• Published: 18.09.2018
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMISTRY; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; USE OF MATERIALS AS ADHESIVES; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

광학 필름이 박형이라 하더라도, 이물질 및/또는 기포에서 기인한 외관 결점의 발생이 방지된 광학 필름의 제조 방법을 제공하는 것. 접착제 조성물 또는 점착제 조성물의 경화물층으로 이루어지는 접착제층 또는 점착제층을 개재하여, 적어도 제 1 필름 및 제 2 필름이 첩합된 적층 구조를 포함하는 광학 필름의 제조 방법으로서, 제 1 필름 및 제 2 필름을 첩합하기 전에, 제 1 필름의, 제 2 필름과의 첩합면의 반대측면, 및 제 2 필름의, 제 1 필름과의 첩합면의 반대측면, 의 적어도 일방의 면에, 그라비아 롤 도포 방식을 사용하여, 점도가 1 ∼ 10000 cP 인 액상물을 도포함으로써, 이물질을 제거하는 제 1 도포 공정을 갖는 광학 필름의 제조 방법. The purpose of the present invention is to provide an optical film manufacturing method with which generation of appearance defects caused by foreign substances and/or bubbles can be prevented even if the optical film is thin. Provided is a method for manufacturing an optical film that includes a laminate structure in which at least a first film and a second film are bonded to each other through an adhesive layer and/or a pressure-sensitive adhesive layer comprising a cured product layer of adhesive composition or a pressure-sensitive adhesive composition, said optical film manufacturing method including a first coating process for removing foreign substances by coating at least either the surface of the first film opposite the surface to be bonded to the second film or the surface of the second film opposite the surface to be bonded to the first film with a liquid material having a viscosity of 1 to 10000 cP using a gravure roll before bonding the first film and the second film.