POLYESTER MULTI-LAYER FILM AND MANUFACTURING METHOD THEREOF
According to a polyester multi-layered film and a method for preparing the same according to one embodiment of the present invention, provided can be a polyester multi-layered film, in which irregularities having a maximum protrusion height (Ry) of 0.1 to 0.5 μm are formed on a surface of an upper s...
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Format: | Patent |
Sprache: | eng ; kor |
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Zusammenfassung: | According to a polyester multi-layered film and a method for preparing the same according to one embodiment of the present invention, provided can be a polyester multi-layered film, in which irregularities having a maximum protrusion height (Ry) of 0.1 to 0.5 μm are formed on a surface of an upper skin layer with a matte-type roll to form protrusions (irregularities) on both sides (upper side and lower side) of the polyester multi-layered film, so that anti-blocking properties and slip properties can be secured even when the upper side and the lower side of different polyester multi-layered films come into contact with each other, and anti-blocking properties and slip properties are excellent without damage of transparency even when upper surfaces to each other or lower surfaces to each other of different polyester multi-layered films come into contact.
본 발명의 일 실시예에 따른 폴리에스테르 다층 필름 및 그의 제조방법에 따르면, 상부 스킨층 표면에 매트타입 롤로 최대돌기높이(Ry)가 0.1 내지 0.5㎛인 요철이 형성함으로써, 폴리에스테르 다층 필름의 양면(상면과 하면) 모두 돌출(요철)이 형성되어, 서로 다른 폴리에스테르 다층 필름의 상면과 하면이 서로 접촉할 경우에도 안티블로킹성 및 슬립성을 확보할 수 있으며, 서로 다른 폴리에스테르 다층 필름의 상면끼리 또는 하면끼리 접촉 시에도 안티블로킹성과 슬립성이 우수하고 투명성의 손상이 없는 폴리에스테르 다층 필름을 제공할 수 있다. |
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