POLYETHYLENE MULTILAYER FILM
The present invention pertains to a polyethylene multilayer film. More specifically, the present invention pertains to: a polyethylene multilayer film having excellent strength against internal and external impacts; and a packaging material using same. An aspect of the present invention pertains to...
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Zusammenfassung: | The present invention pertains to a polyethylene multilayer film. More specifically, the present invention pertains to: a polyethylene multilayer film having excellent strength against internal and external impacts; and a packaging material using same. An aspect of the present invention pertains to a polyethylene multilayer film containing polyethylene as the main component, wherein at least one layer contains polyethylene A satisfying the following properties (1) and (2), and the difference in melting temperature between a first surface layer (outer layer) and a second surface layer (inner layer) is at least 20°C. (1) There is at least one cross fractionation chromatography (CFC) peak between 88°C and 100°C and at least one CFC peak between 40°C and 75°C, and the weight average molecular weight in the range of 40-75°C is at least 90,000 g/mol. (2) The melt index measured at 190°C and 2.16 kg according to ASTM D1238 is 0.2-10 g/10 min.
La présente invention concerne un film multicouche de polyéthylène. Plus spécifiquement, la présente invention concerne : un film multicouche de polyéthylène ayant une excellente résistance contre les impacts internes et externes ; et un matériau d'emballage l'utilisant. Un aspect de la présente invention concerne un film multicouche de polyéthylène contenant du polyéthylène en tant que composant principal, au moins une couche contenant du polyéthylène A satisfaisant les propriétés (1) et (2) suivantes, et la différence de température de fusion entre une première couche de surface (couche externe) et une seconde couche de surface (couche interne) étant d'au moins 20 °C. (1) Il y a au moins un pic de chromatographie de fractionnement croisé (CFC) entre 88 °C et 100 °C et au moins un pic CFC entre 40 °C et 75 °C, et le poids moléculaire moyen en poids dans la plage de 40-75 °C est d'au moins 90 000 g/mol. (2) L'indice de fluidité mesuré à 190 °C et 2,16 kg selon la norme ASTM D1238 est de 0,2 à 10 g/10 min.
본 발명은 폴리에틸렌 다층필름에 관한 것으로, 더욱 구체적으로 내부 및 외부 충격에 대한 강도가 우수한 폴리에틸렌 다층필름과 이를 이용한 포장재에 관한 것이다. 일 양태로 본 발명은 폴리에틸렌을 주성분으로 하는 다층필름으로써, 적어도 하나의 층에 하기 물성(1) 내지 (2)을 만족하는 폴리에틸렌 A를 포함하며, 제1표면층(외층)과 제2표면층(내층)의 용융온도 차이가 20 ℃ 이상인 폴리에틸렌 다층필름에 관한 것이다. (1) 교차 분획 크로마토그래피(CFC, Cross fractionation chromatography) 상에서 88 내지 100 ℃ 사이에 피크가 1개 이상 존재하며, 40 내지 75 ℃ 사이에 피크가 1개 이상 존재하고, 40 내지 75 ℃ 범위의 중량평균분자량이 90,000 g/mol이상 (2) ASTM D1238에 따라 190 ℃, 2.16kg에서 측정된 멜트인덱스가 0.2 내지 10 g/10min |
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