US 12,434,463 B2
Stretched polyethylene film for lamination
Shingo Kouda, Yokkaichi (JP); Shoji Nishio, Yokkaichi (JP); and Kenichi Suzuki, Yokkaichi (JP)
Assigned to TOSOH CORPORATION, Shunan (JP)
Appl. No. 18/281,806
Filed by TOSOH CORPORATION, Yamaguchi (JP)
PCT Filed Feb. 18, 2022, PCT No. PCT/JP2022/006534
§ 371(c)(1), (2) Date Sep. 13, 2023,
PCT Pub. No. WO2022/196239, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. 2021-042232 (JP), filed on Mar. 16, 2021.
Prior Publication US 2024/0308195 A1, Sep. 19, 2024
Int. Cl. B32B 27/32 (2006.01); B32B 7/02 (2019.01); B32B 27/08 (2006.01); C08F 10/02 (2006.01); C08J 5/18 (2006.01); C08L 23/06 (2006.01); C08L 23/0807 (2025.01)
CPC B32B 27/32 (2013.01) [B32B 7/02 (2013.01); B32B 27/08 (2013.01); C08F 10/02 (2013.01); C08J 5/18 (2013.01); C08L 23/06 (2013.01); C08L 23/0815 (2013.01); B32B 2250/02 (2013.01); B32B 2250/242 (2013.01); B32B 2272/00 (2013.01); B32B 2307/518 (2013.01); B32B 2307/72 (2013.01); C08J 2323/06 (2013.01); C08J 2423/08 (2013.01)] 7 Claims
 
1. A stretched polyethylene film for lamination, which comprises a polyethylene (A) having a weight average molecular weight (Mw) as measured by gel permeation chromatography of from 70,000 to 250,000, a proportion of fractions with a molecular weight of 10,000 or less of 8 wt % or less, and a density as measured in accordance with JIS K6922-1 (1997) of from 945 to 980 kg/m3, and has at least one peak in a range of 135° C. or higher in an endothermic curve as measured by a differential scanning calorimetry.