US 12,031,028 B2
Polyamide resin film and resin laminate using the same
Il Hwan Choi, Daejeon (KR); Young Ji Tae, Daejeon (KR); Soonyong Park, Daejeon (KR); Youngseok Park, Daejeon (KR); and Bi Oh Ryu, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/256,055
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Dec. 26, 2019, PCT No. PCT/KR2019/018449
§ 371(c)(1), (2) Date Dec. 24, 2020,
PCT Pub. No. WO2020/159085, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10-2019-0014020 (KR), filed on Feb. 1, 2019; application No. 10-2019-0014021 (KR), filed on Feb. 1, 2019; application No. 10-2019-0066620 (KR), filed on Jun. 5, 2019; application No. 10-2019-0173086 (KR), filed on Dec. 23, 2019; and application No. 10-2019-0174355 (KR), filed on Dec. 24, 2019.
Prior Publication US 2021/0222007 A1, Jul. 22, 2021
Int. Cl. C08L 77/10 (2006.01); B32B 27/08 (2006.01); B32B 27/34 (2006.01); C08G 69/26 (2006.01); C08G 69/42 (2006.01); C08K 5/3475 (2006.01); C08K 5/3492 (2006.01)
CPC C08L 77/10 (2013.01) [B32B 27/08 (2013.01); C08G 69/265 (2013.01); C08G 69/42 (2013.01); C08K 5/3475 (2013.01); C08K 5/3492 (2013.01); B32B 27/34 (2013.01); B32B 2250/02 (2013.01); B32B 2250/03 (2013.01); B32B 2307/412 (2013.01); B32B 2307/71 (2013.01); B32B 2457/20 (2013.01); C08L 2201/08 (2013.01); C08L 2201/10 (2013.01); C08L 2203/16 (2013.01); C08L 2203/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A polyamide resin film comprising: a polyamide resin containing a backbone chain formed by alternative bonding of a first polyamide segment containing a first aromatic amide repeating unit, and a second polyamide segment containing a second aromatic amide repeating unit having a structure different from the first aromatic amide repeating unit,
wherein a transmittance of ultraviolet light with a wavelength of 388 nm for a film specimen having a thickness of 45 μm or more and 55 μm or less is 15% or less, and
wherein a UV-cut slope (dT/dλ) for the film specimen having a thickness of 45 μm or more and 55 μm or less as measured according to ASTM E424 is at least 0.25 in the range of 10% to 80% transmittance,
wherein the backbone chain includes an alternating repeating unit represented by Chemical Formula 3,

OG Complex Work Unit Chemistry
in the Chemical Formula 3,
A is the first polyamide segment, and
B is the second polyamide segment, and
wherein a haze value measured according to ASTM D1003 for a film specimen having a thickness of 45 μm or more and 55 μm or less is 1.5% or less.