US 11,851,551 B2
Sealant film for packaging liquid contents, laminate including same, packaging material for liquid contents, and package for liquid contents
Naoya Takeuchi, Tokyo (JP); Shin Yamada, Tokyo (JP); Yoshihiko Suzuki, Tokyo (JP); and Tomohiro Yonemoto, Tokyo (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/701,271.
Application 17/701,271 is a division of application No. 16/651,820, previously published as PCT/JP2018/036181, filed on Sep. 28, 2018.
Claims priority of application No. 2017-190465 (JP), filed on Sep. 29, 2017; application No. 2017-190466 (JP), filed on Sep. 29, 2017; application No. 2017-190467 (JP), filed on Sep. 29, 2017; application No. 2017-190468 (JP), filed on Sep. 29, 2017; application No. 2017-190469 (JP), filed on Sep. 29, 2017; application No. 2017-190470 (JP), filed on Sep. 29, 2017; and application No. 2018-162369 (JP), filed on Aug. 31, 2018.
Prior Publication US 2022/0220290 A1, Jul. 14, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 23/06 (2006.01); B32B 27/04 (2006.01); B32B 27/32 (2006.01); B65D 35/40 (2006.01); B65D 35/42 (2006.01)
CPC C08L 23/06 (2013.01) [B32B 27/04 (2013.01); B32B 27/32 (2013.01); B65D 35/40 (2013.01); B65D 35/42 (2013.01); B32B 2260/046 (2013.01); C08L 2203/162 (2013.01); C08L 2207/066 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A laminate for packaging liquid contents, comprising a substrate layer and a sealant layer, wherein
the sealant layer comprises at least an odor adsorption layer,
the sealant layer is formed from a resin composition containing low-elution polyethylene,
the odor adsorption layer is formed from a resin composition containing the low-elution polyethylene and an odor adsorbent,
a concentration of eluting TOC contained in a film formed from the low-elution polyethylene is 1.5 ppm or higher and 250 ppm or lower, and
the odor adsorbent comprises a hydrophobic zeolite of which a molar ratio of SiO2/Al2O3 is 30/1 to 10000/1, wherein an increment of TOC concentration of filling water (1000 g, 65° C.) filled in a package of a pouch bag (15 cm×44 cm) produced with the laminate, where an inner surface of the pouch bag was previously subjected to sterilization treatment by UV irradiation (wavelength 253.7 nm for 10 seconds at 25° C.), after storage at 35° C. for 2 weeks is 0.26 ppm or more and 0.70 ppm or less.