	US 12,264,267 B2
	Resin composition, and film for lid materials
Takashi Hemmi, Yokkaichi (JP); Isao Morishita, Yokkaichi (JP); and Shingo Kouda, Yokkaichi (JP)
Assigned to TOSOH CORPORATION, Shunan (JP)
Appl. No. 17/441,735
Filed by TOSOH CORPORATION, Shunan (JP)
PCT Filed Mar. 18, 2020, PCT No. PCT/JP2020/011976 § 371(c)(1), (2) Date Sep. 22, 2021, PCT Pub. No. WO2020/196157, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-056363 (JP), filed on Mar. 25, 2019.
Prior Publication US 2022/0213356 A1, Jul. 7, 2022
Int. Cl. C09J 123/08 (2006.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); C09K 3/10 (2006.01)

CPC C09J 123/0853 (2013.01) [B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/302 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); C09K 3/1006 (2013.01); B32B 2270/00 (2013.01); B32B 2307/748 (2013.01); B32B 2435/02 (2013.01); C09K 2200/062 (2013.01); C09K 2200/0622 (2013.01)]

13 Claims

1. A resin composition comprising:

an ethylene-vinyl acetate copolymer (A) in an amount of not less than 60 parts by weight and not more than 95 parts by weight, the ethylene-vinyl acetate copolymer (A) having a vinyl acetate content (VA) of not less than 3% by weight and not more than 13% by weight, and having a ratio Qw between a weight-average molecular weight (Mw) and a number-average molecular weight (Mn) of 1.5 or more and 4.5 or less; and

a tackifier resin (B) in an amount of not less than 5 parts by weight and not more than 40 parts by weight,

where a total amount of (A) and (B) is 100 parts by weight, and

the ethylene-vinyl acetate copolymer (A) satisfies a relational expression: Qw<−1.9×ln VA+9.0, where ln VA represents a natural logarithm of the vinyl acetate content VA.