US 12,441,857 B2
Polyethylene film, laminate and package using the same
Yuya Takasugi, Tokyo (JP)
Assigned to Dai Nippon Printing Co., Ltd., Tokyo (JP)
Appl. No. 15/747,924
Filed by Dai Nippon Printing Co., Ltd., Tokyo (JP)
PCT Filed Jul. 28, 2016, PCT No. PCT/JP2016/072153
§ 371(c)(1), (2) Date Jan. 26, 2018,
PCT Pub. No. WO2017/018479, PCT Pub. Date Feb. 2, 2017.
Claims priority of application No. 2015148954 (JP), filed on Jul. 28, 2015; application No. 2015148956 (JP), filed on Jul. 28, 2015; application No. 2015148958 (JP), filed on Jul. 28, 2015; application No. 2015148963 (JP), filed on Jul. 28, 2015; application No. 2016139634 (JP), filed on Jul. 14, 2016; application No. 2016139636 (JP), filed on Jul. 14, 2016; application No. 2016139644 (JP), filed on Jul. 14, 2016; and application No. 2016139652 (JP), filed on Jul. 14, 2016.
Prior Publication US 2018/0215884 A1, Aug. 2, 2018
Int. Cl. C08J 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/16 (2006.01); B32B 27/32 (2006.01); B65D 65/40 (2006.01); C08J 5/18 (2006.01); C08J 7/00 (2006.01)
CPC C08J 7/123 (2013.01) [B32B 27/08 (2013.01); B32B 27/16 (2013.01); B32B 27/32 (2013.01); B65D 65/40 (2013.01); C08J 5/18 (2013.01); C08J 7/00 (2013.01); B32B 2250/02 (2013.01); B32B 2307/31 (2013.01); B32B 2307/72 (2013.01); B32B 2323/046 (2013.01); B32B 2439/00 (2013.01); C08J 2323/06 (2013.01); C08J 2425/04 (2013.01); Y02W 30/80 (2015.05)] 2 Claims
OG exemplary drawing
 
1. A laminate consisting of:
a polyethylene film substrate comprising polyethylene and a crosslinking agent, wherein the crosslinking agent is at least one crosslinking agent selected from the group consisting of a styrene-polyisoprene elastomer, a styrene-polybutadiene elastomer, a styrene-polyisoprene-butadiene random copolymer, and an ethylene-acrylic ester-glycidyl methacrylate; and
a polyethylene film layer;
wherein a content of the crosslinking agent in the polyethylene film substrate is in a range of 10 to 40% by mass,
wherein both sides of the polyethylene film substrate are irradiated with an electron beam,
wherein a gel fraction of the polyethylene film substrate is in a range of 20 to 80%, and
wherein at least one side of the polyethylene film layer opposite to the polyethylene film substrate is not irradiated with the electron beam and has heat sealability.