公开(公告)号：US11298926B2

公开(公告)日：2022-04-12

申请号：US16493196

申请日：2018-03-14

Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.

Inventor： Yuuki Tashiro ,  Takayuki Ishihara ,  Azusa Otsuki

IPC: B32B1/02 ,  B32B27/32 ,  B32B27/30 ,  B32B7/12 ,  B32B27/08 ,  B65D65/40 ,  C08L23/12

Abstract: A gas-barrier multilayered container having (i) a layer of a propylene type polymer which chiefly includes a homopolypropylene having an isotactic index of not less than 93%, and (ii) a layer of an ethylene-vinyl alcohol copolymer having not less than two crystal melting peak temperatures. Also disclosed is a lustrous and shock-resistant multilayered container having at least (i) an outermost layer of a propylene type polymer A which chiefly includes a homopolypropylene having a melt flow rate of 2.0 to 10.0 g/10 min., and (ii) an inner layer of a propylene type polymer B which chiefly includes a homopolypropylene having a melt flow rate of not more than 1.0 g/10 min.

公开(公告)号：US11148402B2

公开(公告)日：2021-10-19

申请号：US17269379

申请日：2019-08-30

Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.

Inventor： Yuuki Tashiro ,  Takayuki Ishihara ,  Azusa Otsuki ,  Kenji Ichikawa ,  Toshiki Yamada ,  Seishi Yoshikawa ,  Koki Shibata

IPC: B32B27/08 ,  B32B27/32

Abstract: A multilayer container including: an outermost layer (1) containing a propylene-based polymer A containing homopolypropylene as a main component having a melt flow rate in a range of 2.0 to 10.0 g/10 min; an inner layer (2) containing 50 to 99% by weight of a propylene-based polymer B containing homopolypropylene as a main component having a melt flow rate of not more than 5.0 g/10 min and an isotactic index of not less than 93%, and 1 to 50% by weight of an ethylene-α-olefin copolymer C; and a barrier layer (4) occupying 5 to 20% by weight of the whole container. The ratio (L/D) of container height (L) to diameter (D) is not less than 0.5, and a volume shrinkage based on volume measured before and after heat sterilization at 121° C. for 30 minutes is not more than 5%.