BLACK SHADING FILM WITH IMPROVED DURABILITY AND MANUFACTURING METHOD THEREOF

• Main Authors: KIM UN GON, LIM JONG SOON
• Format: Patent
• Language: English; Korean
• Published: 28.11.2022
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; 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; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention relates to a method for manufacturing a light-shielding film, comprising the steps of: performing corona discharge treatment on a surface of a polyethylene terephthalate (PET) film substrate; forming a primer layer by applying a primer composition to the surface of the substrate; and forming a light-shielding layer by applying an ink composition for light shielding on the primer layer. The corona discharge treatment is performed by applying corona of 1,500 to 2,500 W, and the surface tension of the substrate treated with corona discharge is 46 dyne/cm or more. The substrate film and the light-shielding layer can be stably laminated without separation, thereby improving the durability of the light-shielding film. 본 발명은 차광필름의 제조방법에 관한 것으로서, 폴리에틸렌테레프탈레이트(PET) 필름 기재의 표면을 코로나 방전 처리하는 단계, 상기 기재의 표면에 프라이머 조성물을 도포하여 프라이머층을 형성하는 단계, 상기 프라이머층 상에 차광용 잉크 조성물을 도포하여 차광층을 형성하는 단계를 포함하며, 상기 코로나 방전 처리는 1,500 내지 2,500W의 코로나를 인가하여 처리하며, 상기 코로나 방전 처리된 기재의 표면장력은 46dyne/㎝ 이상인 것으로서, 기재 필름과 차광층 사이의 분리나 이탈이 없이 안정적으로 적층되어 차광필름의 내구성을 향상시킬 수 있다.