	US 11,884,799 B2
	Polyethylene resin composition, laminate, and medical container
Hideyasu Nakao, Yokkaichi (JP); and Yoshiyuki Moro, Yokkaichi (JP)
Assigned to TOSOH CORPORATION, Shunan (JP)
Appl. No. 17/267,942
Filed by TOSOH CORPORATION, Shunan (JP)
PCT Filed Sep. 6, 2019, PCT No. PCT/JP2019/035130 § 371(c)(1), (2) Date Feb. 11, 2021, PCT Pub. No. WO2020/054594, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 2018-170650 (JP), filed on Sep. 12, 2018.
Prior Publication US 2021/0214538 A1, Jul. 15, 2021
Int. Cl. C08L 23/06 (2006.01); A61J 1/10 (2006.01); A61J 1/14 (2023.01); B32B 1/02 (2006.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/32 (2006.01); C08L 23/08 (2006.01); C08F 210/16 (2006.01); C08F 4/659 (2006.01); C08F 4/6592 (2006.01); B32B 27/20 (2006.01); B32B 7/12 (2006.01); A61L 31/04 (2006.01)

CPC C08L 23/06 (2013.01) [A61J 1/10 (2013.01); A61J 1/1468 (2015.05); B32B 1/02 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/32 (2013.01); C08F 210/16 (2013.01); C08L 23/0815 (2013.01); A61L 31/048 (2013.01); B32B 7/12 (2013.01); B32B 27/20 (2013.01); B32B 2250/03 (2013.01); B32B 2250/242 (2013.01); B32B 2250/40 (2013.01); B32B 2270/00 (2013.01); B32B 2307/306 (2013.01); B32B 2307/412 (2013.01); B32B 2307/7242 (2013.01); B32B 2307/732 (2013.01); B32B 2439/46 (2013.01); B32B 2439/80 (2013.01); C08F 4/65912 (2013.01); C08F 4/65916 (2013.01); C08F 4/65925 (2013.01); C08F 4/65927 (2013.01); C08F 2410/06 (2021.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C08L 2207/062 (2013.01); C08L 2207/066 (2013.01)]

7 Claims

1. A polyethylene resin composition comprising from 50 to 89 parts by weight of a linear low density polyethylene (A) which satisfies following requirements (a) to (c), from 10 to 40 parts by weight of a high density polyethylene (B) which satisfies following requirements (d) to (f), and from 1 to 20 parts by weight of a high pressure low density polyethylene (C) which satisfies following requirements (g) to (i) (the total amount of (A), (B) and (C) is 100 parts by weight), and the polyethylene resin composition satisfying following requirement (j) wherein melt mass flow rate (MFR) is measured in accordance with JIS K6922-1 at 190° C. under a load of 21.18N:

(a): density is from 890 to 920 kg/m³,

(b): MFR is from 3.0 to 15 g/10 min,

(c): a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw/Mn) is from 2.0 to 3.0,

(d): density is from 935 to 970 kg/m³,

(e): MFR is from 3.0 to 15 g/10 min,

(f): a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw/Mn) is from 2.0 to 3.0,

(g): density is from 910 to 930 kg/m³,

(h): MFR is from 0.1 to 1.0 g/10 min,

(i): melt strength is from 200 to 400 mN,

(j): MFR is from 3.0 to 9.0 g/10 min.