US 12,280,564 B2
Polymer film and uses of the same
Yen-Chen Huang, Taipei (TW); and Tzu-Jung Huang, Taipei (TW)
Assigned to CHANG CHUN PETROCHEMICAL CO., LTD., Taipei (TW)
Filed by Chang Chun Petrochemical Co., Ltd., Taiipei (TW)
Filed on Sep. 12, 2022, as Appl. No. 17/931,213.
Claims priority of application No. 202210127818.4 (CN), filed on Feb. 11, 2022; and application No. 111105145 (TW), filed on Feb. 11, 2022.
Prior Publication US 2023/0256718 A1, Aug. 17, 2023
Int. Cl. B32B 17/10 (2006.01)
CPC B32B 17/10761 (2013.01) [B32B 17/10036 (2013.01); B32B 17/10605 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2307/538 (2013.01); B32B 2307/732 (2013.01)] 10 Claims
 
1. A polymer film, which has a first exposed surface devoid of any additional film layers thereon and a second exposed surface devoid of any additional film layers thereon, wherein the first exposed surface has a root mean square gradient (Sdq) ranging from 1.53 to 2.88 and a root mean square height (Sq) ranging from 8.70 μm to 18.80 μm, wherein the Sdq and Sq are defined in accordance with ISO 25178-2:2012, wherein the polymer film comprises poly(vinyl butyral) and a plasticizer, wherein the polymer film has a thickness ranging from 0.1 mm to 2.5 mm.