公开(公告)号：US20200180279A1

公开(公告)日：2020-06-11

申请号：US16342425

申请日：2017-10-17

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Gene MEDLOCK ,  Wataru HIROSE

IPC: B32B27/08 ,  B32B1/02 ,  B32B27/30 ,  B32B27/32 ,  B29C45/16 ,  B65D65/40

Abstract: There is provided a co-injection-molded multilayer structure having a barrier layer and outer layers laminated on both sides of the barrier layer, wherein the barrier layer is made of a resin composition comprising an ethylene-vinyl alcohol copolymer (A) and an alkali metal salt (B) of a higher fatty acid having a melting point of 250° C. or lower; a content of the alkali metal salt (B) in the barrier layer is 50 to 1500 ppm in terms of metal atoms; and the outer layers are made of a resin composition comprising an unmodified polypropylene (E) and a maleic anhydride-modified polypropylene (F) having a lower melt viscosity than that of the unmodified polypropylene (E). Although it has no adhesive layers, the co-injection-molded multilayer structure exhibits excellent adhesiveness between the barrier layer made of an EVOH resin composition and the outer layer made of a polypropylene resin composition.

公开(公告)号：US20210101375A1

公开(公告)日：2021-04-08

申请号：US17065557

申请日：2020-10-08

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW

IPC: B32B27/08 ,  B32B27/30 ,  B32B7/12

Abstract: The present invention relates to a polyfluoroalkyl substance (PFAS) diffusion preventing system comprising a multilayer polyolefin based article (such as a geomembrane) with at least one layer of ethylene-vinyl alcohol resin (EVOH), wherein the system contains at least one of a cover, a liner and/or a container as such multilayer article.

公开(公告)号：US20200070483A1

公开(公告)日：2020-03-05

申请号：US16554032

申请日：2019-08-28

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Astrid Torres ,  Wataru Hirose

IPC: B32B27/30 ,  B32B7/12 ,  B65D77/00

Abstract: A multilayer article having at least one layer of an ethylene vinyl alcohol (EVOH) resin composition comprising of an ethylene-vinyl alcohol copolymer, an unmodified ethylene-α-olefin copolymer and acid modified ethylene-α-olefin copolymer as described below, which is suitable for use in making (or as) a storage bag for agricultural products, food, drink, pharmaceutical, cosmetic, industrial chemical, detergent products.

公开(公告)号：US20190202181A1

公开(公告)日：2019-07-04

申请号：US16235845

申请日：2018-12-28

Applicant: KURARAY CO., LTD.

Inventor： Wataru HIROSE ,  Edgard CHOW ,  Robert ARMSTRONG

IPC: B32B27/30 ,  B32B27/32 ,  C08L23/08 ,  C08L29/04

CPC classification number: B32B27/306 ,  B32B27/327 ,  B32B2307/7242 ,  B32B2309/105 ,  C08L23/08 ,  C08L29/04

Abstract: A multilayer article (such as a film) suitable for use as a gas barrier, the multilayer article comprising at least one an ethylene vinyl alcohol (EVOH) based barrier layer formed from a resin composition predominantly comprising an EVOH component of one or more specific types of ethylene-vinyl alcohol copolymers as described herein.

公开(公告)号：US20170326852A1

公开(公告)日：2017-11-16

申请号：US15529562

申请日：2015-11-25

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Wataru HIROSE

IPC: B32B27/30 ,  B65D65/02

Abstract: A silage film having at least one layer of a resin composition containing an ethylene-vinyl alcohol copolymer (A) and a hydroxy group-containing compound (B). In the resin composition containing the ethylene-vinyl alcohol copolymer (A) and the hydroxy group-containing compound (B), the hydroxy group-containing compound (B) has a molecular weight of less than or equal to 200, a ratio of number of hydroxy groups per molecule to the molecular weight ranging from 0.02 to 0.03, and a melting point of greater than or equal to 23° C., and a content of the hydroxy group-containing compound (B) in the resin composition ranging from 3% to 15% by mass. The silage film has excellent oxygen barrier property and stretchability (suitability for wrapping) and can be suitably used for long-term storage of silage.

公开(公告)号：US20210237390A1

公开(公告)日：2021-08-05

申请号：US17161730

申请日：2021-01-29

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Astrid TORRES

IPC: B32B1/08 ,  F17D5/00 ,  B32B27/32 ,  B32B27/30 ,  B32B7/12 ,  B32B17/02 ,  B32B17/10 ,  B32B27/12 ,  F16L11/08

Abstract: A flexible pipe comprising at least one layer of ethylene-vinyl alcohol resin (EVOH) as the innermost layer, wherein the pipe is suitable for use under high pressure, is configured to retain mechanical properties at pressures up to at least about 1500 psig, and can also retain its structural function upon decompression.

公开(公告)号：US20200291197A1

公开(公告)日：2020-09-17

申请号：US16332586

申请日：2017-09-13

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Kentaro YOSHIDA ,  Tatsuya HASEGAWA

IPC: C08J5/18 ,  A01F25/14 ,  A01G13/02 ,  A01G9/14 ,  A01M13/00 ,  A01F25/13 ,  E02D17/20 ,  E02D31/00 ,  C08J3/22 ,  C08K5/3435 ,  C08K5/13 ,  F16L9/12

Abstract: A resin composition contains an ethylene-vinyl alcohol copolymer (A) in which an ethylene unit content is from 10 to 60 mol %, a hindered amine-based compound (B) having a 2,2,6,6-tetraalkylpiperidine ring structure and having an alkoxy group bonded to a nitrogen atom in the structure, and a hindered phenol-based compound (C) having an ester bond or an amide bond. The resin composition contains 0.1 to 5 parts by mass of the hindered amine-based compound (B) and 0.2 to 5 parts by mass of the hindered phenol-based compound (C) with respect to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A), and a mass ratio (C)/(B) is from 0.2 to 3.6.

公开(公告)号：US20200087493A1

公开(公告)日：2020-03-19

申请号：US16568977

申请日：2019-09-12

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Diana Maya ,  Wataru Hirose

IPC: C08L23/08 ,  C08L23/26 ,  C08J5/18

Abstract: A monolayer film is provided which contains ethylene vinyl alcohol copolymer (EVOH), contamination from dirt and a compatibilizer, that can be used for producing trash bags and the like, as well as a method to successfully recycle fumigation films containing EVOH and contamination from dirt into such a monolayer film.

公开(公告)号：US20170369613A1

公开(公告)日：2017-12-28

申请号：US15625474

申请日：2017-06-16

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Robert ARMSTRONG ,  Kentaro YOSHIDA

IPC: C08F216/06 ,  C09J7/02 ,  C09J175/04

Abstract: OBJECTAn object is to provide a resin composition capable of forming a crosslinked product that is excellent in hot water resistance and excellent in interlayer adhesiveness when formed into a multilayered structure.SOLUTIONThe resin composition contains an ethylene-vinyl alcohol copolymer (A) and a crosslinking agent (B) with the crosslinking agent (B) in an amount of 0.6 to 15 parts by mass relative to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A), the crosslinking agent (B) being a powder obtained by impregnating a porous body (BS) with a crosslinkable compound (BL) having three or more polymerizable groups and a melting point of no greater than 40° C.

公开(公告)号：US20170044350A1

公开(公告)日：2017-02-16

申请号：US15305803

申请日：2015-04-24

Applicant: KURARAY CO., LTD.

Inventor： Edgard CHOW ,  Wataru HIROSE

IPC: C08K5/053 ,  B32B27/30

CPC classification number: C08K5/053 ,  B32B27/306 ,  C08L23/0861 ,  C08L29/04

Abstract: A resin composition containing an ethylene-vinylalcohol copolymer (A) and a hydroxyl group containing compound (B), the hydroxyl group containing compound (B) having a molecular weight of 200 or less, a ratio of the number of hydroxyl groups in one molecule relative to the molecular weight within a range of 0.02-0.03, and a melting point of 23° C. or higher, the content of the hydroxyl group containing compound (B) being 3-15 mass % relative to the resin composition, a molded product using the same, and a multilayer structure including a layer composed of the resin composition.

Abstract translation: 含有乙烯 - 乙烯醇共聚物（A）和含羟基的化合物（B），含羟基的化合物（B）的分子量为200以下的树脂组合物，1分子中的羟基数 相对于分子量为0.02-0.03，熔点为23℃以上，含羟基化合物（B）的含量相对于树脂组合物为3〜15质量％，成型 使用其的产品，以及包含由该树脂组合物构成的层的多层结构体。