公开(公告)号：US20230347631A1

公开(公告)日：2023-11-02

申请号：US18025777

申请日：2021-09-09

Applicant: KURARAY CO., LTD.

Inventor： Takeshi Sakano ,  Kentaro Yoshida ,  Satoshi Ishiuchi ,  Tatsuya Oshita

IPC: B32B27/08 ,  B32B27/30 ,  B32B27/32 ,  C08L23/20

CPC classification number: B32B27/08 ,  B32B27/306 ,  B32B27/32 ,  C08L23/20 ,  B32B2255/10 ,  B32B2255/20 ,  B32B2305/026 ,  B32B2307/7376 ,  B32B2307/74 ,  B32B2553/00

Abstract: The present disclosure provides a multilayer structure in which a layer (A) made of a polyolefin resin composition (a), an oxygen barrier layer (B) and a sealant layer (C) are laminated in this sequence.

公开(公告)号：US20220259418A1

公开(公告)日：2022-08-18

申请号：US17619547

申请日：2020-06-26

Applicant: KURARAY CO., LTD.

Inventor： Takeshi Sakano ,  Tatsuya Oshita

IPC: C08L23/16 ,  C08K5/098 ,  B32B27/32 ,  B32B27/08

Abstract: A resin composition of the present invention contains an ethylene-cyclic olefin copolymer (A) that includes repeating units including ethylene units and norbornene units having a substituent R1 and is represented by Formula (I) below, and a transition metal catalyst (B). In the formula, R1 represents an ethylene group or an ethylene group that is subjected to substitution with an aliphatic hydrocarbon group having 1 to 3 carbon atoms, l and n represent the content ratios of the ethylene units and the norbornene units having a substituent R1, respectively, and the ratio of l to n (l/n) is 4 or more and 2,000 or less.

公开(公告)号：US20220307629A1

公开(公告)日：2022-09-29

申请号：US17612359

申请日：2020-05-12

Applicant: KURARAY CO., LTD.

Inventor： Yuan Song ,  Takeshi Sakano ,  Weimin Gao

IPC: F16L11/12 ,  F16L11/08

Abstract: Disclosed are a structure of a composite flexible pipeline for crude oil and natural gas transportation, a laying method therefor, and a transportation method for crude oil or natural gas. The transportation method is a method for transporting crude oil or natural gas through a pipeline comprising a multilayer structure having at least one barrier resin layer. The barrier resin layer comprises an ethylene-vinyl alcohol copolymer resin as a main component. A pipeline for the transportation method, and a laying method for the pipeline. Through a pipeline which does not have corrosion concern and has excellent acid resistance and acid gas barrier properties, a method for safely transporting crude oil or natural gas is provided without leak of hydrogen sulfide gas, carbon dioxide, and hydrocarbon gas to the external environment.

公开(公告)号：US11332574B2

公开(公告)日：2022-05-17

申请号：US16314119

申请日：2017-07-13

Applicant: KURARAY CO., LTD.

Inventor： Takeshi Sakano ,  Soichiro Tanabe

IPC: C08G63/676 ,  C08J5/18 ,  C08G63/16 ,  B29C48/00 ,  B29C55/00 ,  B29C55/02 ,  C09K3/10 ,  B29L7/00

Abstract: Disclosed is a sealant film including at least a layer formed of a polyester as a superficial layer, in which the polyester contains 20 to 50 mol % of a 2,5-furandicarboxylic acid unit, 18 to 49.5 mol % of at least one diol unit selected from the group consisting of an ethylene glycol unit, a 1,3-propanediol unit, and a 1,4-butanediol unit, and 0.5 to 2.5 mol % of a diethylene glycol unit, the sealant film has a crystallinity of less than 14%, and the sealant film is a stretched film that exhibits a shrinkage ratio of 6% or more in a maximum shrinkage direction upon being allowed to stand at 125° C. for 20 seconds. This provides a sealant film superior in mechanical properties, especially tensile elongation, and also superior in heat sealability, non-adsorptivity, and gas barrier properties.