폴리프로필렌계 다공성 필름 및 이를 포함하는 적층 필름

• Main Authors: TANAKA NOBUYUKI, HARADA YUTA
• Format: Patent
• Language: Korean
• Published: 09.04.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

[과제] 폴리프로필렌을 소재로 하여 높은 강도를 유지하면서, 높은 통기도와 충분한 라미네이트 강도를 달성한 폴리프로필렌계 다공성 필름을 제공한다. [해결수단] 폴리프로필렌에 직쇄상 저밀도 폴리에틸렌 3질량% 이상 10질량% 미만의 비율로 포함하는 혼합 수지 100질량부에 대하여, 무기충전제 230~400질량부를 포함하는 수지 조성물로 이루어지고, 통기도 80초/100ml 이하, 내수압 50kPa 이상, 기계방향(MD)의 인장강도가 15N/15mm 이상, 횡단방향(TD)의 인장강도가 5N/15mm 이상을 나타내는 다공성 필름. The present invention provides a polypropylene-based porous film which uses polypropylene as a raw material, maintains high strength, and achieves high air permeability and sufficient lamination strength. A porous film comprising a resin composition containing 230-400 parts by mass of an inorganic filler per 100 parts by mass of a mixed resin comprising a linear low-density polyethylene in a ratio of 3 mass% to less than 10 mass% in polypropylene, the porous film exhibiting an air permeability of 80 sec/100 ml or less, a water pressure resistance of 50 kPa or more, and a water pressure resistance of 50 kPa or more. The tensile strength in the mechanical direction (MD) is 15 N/15 mm or more, and the tensile strength in the transverse direction (TD) is 5 N/15 mm or more.