US 12,134,251 B2
Flame-retardant polyester decorative sheet
Ho Jin Min, Gumi-si (KR); Beom Taek Han, Gumi-si (KR); Nam Heui Lee, Gumi-si (KR); and Myeong Seok Seong, Gumi-si (KR)
Assigned to TORAY ADVANCED MATERIALS KOREA INC., Gumi-si (KR)
Appl. No. 18/567,520
Filed by TORAY ADVANCED MATERIALS KOREA INC., Gumi-si (KR)
PCT Filed Jul. 15, 2022, PCT No. PCT/KR2022/010324
§ 371(c)(1), (2) Date Dec. 6, 2023,
PCT Pub. No. WO2023/013917, PCT Pub. Date Feb. 9, 2023.
Claims priority of application No. 10-2021-0103603 (KR), filed on Aug. 6, 2021.
Prior Publication US 2024/0269971 A1, Aug. 15, 2024
Int. Cl. B32B 27/00 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/36 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 27/20 (2013.01); B32B 27/36 (2013.01); B32B 2250/03 (2013.01); B32B 2250/244 (2013.01); B32B 2250/40 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2264/1022 (2020.08); B32B 2270/00 (2013.01); B32B 2307/3065 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/54 (2013.01); B32B 2307/7376 (2023.05); B32B 2451/00 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A flame-retardant polyester decorative sheet comprising:
a core layer containing a first polyester resin and a first polyphosphonate; and
a skin layer, which is positioned on at least one surface of the core layer and contains a second polyester resin and a second polyphosphonate,
wherein contents of the first polyphosphonate and the second polyphosphonate satisfy Equation 1, respectively:

OG Complex Work Unit Math
wherein the core layer contains 4 to 12 wt. % of a first color master batch based on the total weight of the core layer and the skin layer contains 25 to 35 wt. % of a second color master batch based on the total weight of the skin layer, and
wherein a thickness of the flame-retardant polyester decorative sheet is 0.20 to 0.60 mm.