US 12,404,378 B2
Polyolefin film and process for preparing the same
Ui Gap Joung, Daejeon (KR); Sung Dong Kim, Daejeon (KR); Hye Ran Park, Daejeon (KR); Junho Seo, Daejeon (KR); Munhee Lee, Daejeon (KR); Seongjae Lim, Daejeon (KR); Yujeong Jeong, Daejeon (KR); and Tae Uk Jeong, Daejeon (KR)
Assigned to HANWHA SOLUTIONS CORPORATION, Seoul (KR)
Appl. No. 17/779,211
Filed by HANWHA SOLUTIONS CORPORATION, Seoul (KR)
PCT Filed Nov. 20, 2020, PCT No. PCT/KR2020/016424
§ 371(c)(1), (2) Date May 24, 2022,
PCT Pub. No. WO2021/107508, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 10-2019-0155703 (KR), filed on Nov. 28, 2019.
Prior Publication US 2023/0002573 A1, Jan. 5, 2023
Int. Cl. C08J 5/18 (2006.01); C08F 4/6592 (2006.01); C08F 10/02 (2006.01)
CPC C08J 5/18 (2013.01) [C08F 4/6592 (2013.01); C08F 10/02 (2013.01); C08J 2323/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A polyolefin film, which is molded from a polyolefin having (1) a density of 0.910 to 0.940 g/cm3; (2) a melt flow ratio (MFR) of 10 to 60 when measured at 190° C. as a ratio of the melt index (121.6) under a load of 21.6 kg to the melt index (12.16) under a load of 2.16 kg; and (3) a comonomer distribution slope (CDS) of 1 or more as defined by Equation 1, wherein the film has a heat seal strength of 90 gf/2.5 cm or more when measured at 0.2 bar, 1.5 seconds, and 125° C., and a heat seal strength of 210 gf/2.5 cm or more when measured at 0.2 bar, 1.5 seconds, and 140° C.:

OG Complex Work Unit Math
in the equation, C20 and C80 are the comonomer contents at the point where the cumulative weight fraction in the comonomer distribution is 20% and 80%, respectively, and M20 and M80 are the molecular weights at which the cumulative weight fraction in the comonomer distribution is 20% and 80%, respectively, and
wherein the polyolefin is a copolymer of an olefinic monomer and an olefinic comonomer.