US 12,350,907 B2
Impact-resistant polypropylene film and method for producing the same
Te-Chao Liao, Taipei (TW); Ching-Yao Yuan, Taipei (TW); and Chih-Feng Wang, Taipei (TW)
Assigned to NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed by NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed on Dec. 29, 2022, as Appl. No. 18/148,399.
Claims priority of application No. 111140182 (TW), filed on Oct. 24, 2022.
Prior Publication US 2024/0131827 A1, Apr. 25, 2024
Prior Publication US 2024/0227369 A9, Jul. 11, 2024
Int. Cl. B32B 27/08 (2006.01); B29C 48/08 (2019.01); B32B 27/32 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 27/32 (2013.01); B29C 48/08 (2019.02); B32B 2250/242 (2013.01); B32B 2250/40 (2013.01); B32B 2270/00 (2013.01); B32B 2307/30 (2013.01); B32B 2307/31 (2013.01); B32B 2307/558 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An impact-resistant polypropylene film, characterized in that the impact-resistant polypropylene film has a three-layered structure, the impact-resistant polypropylene film comprising:
two outer layers each including a propylene block polymer, wherein the propylene block polymer includes a propylene monomer and an ethylene-propylene polymer, and the ethylene-propylene polymer is dispersed in the propylene monomer to form a sea-island structure; wherein the sea-island structure includes a sea phase and an island phase, the propylene monomer is defined as the sea phase, and the ethylene-propylene polymer is defined as the island phase; and
a middle layer arranged between the two outer layers and including a propylene block polymer and an ethylene elastomer, wherein, based on 100 parts by weight of the middle layer, a content of the propylene block polymer is 60 to 80 parts by weight, and a content of the ethylene elastomer is 20 to 40 parts by weight;
wherein, after the impact-resistant polypropylene film is placed in an environment having a temperature of 135° C. for 30 minutes, an impact resistance of the impact-resistant polypropylene film is within a range from 80 J/cm to 120 J/cm.