公开(公告)号：US12109742B2

公开(公告)日：2024-10-08

申请号：US17464744

申请日：2021-09-02

Applicant: KURARAY CO., LTD.

Inventor： Satoshi Katsuya ,  Ryokei Endo ,  Yosuke Washitake ,  Shunsuke Suiko

IPC: B32B7/02 ,  B29C44/34 ,  D04H1/488 ,  C08L101/12

CPC classification number: B29C44/3492 ,  D04H1/488 ,  C08L101/12

Abstract: Provided are a space filling material and a space filling structure capable of filling a predetermined space for various purposes, and method for using those. A space filling material (11) includes reinforcing fibers as an expansion material and a resin. The reinforcing fibers form a plurality of intersections and are bonded with the resin at at least one of the intersections. Heating of the space filling material causes an expansion stress in at least a thickness direction (X) such that the space filling material fills a predetermined space (13). For example, the space filling material may contain the resin at a volume ratio of 15 to 95 vol % based on a total volume of the reinforcing fibers and the resin.

公开(公告)号：US20240150944A1

公开(公告)日：2024-05-09

申请号：US18544082

申请日：2023-12-18

Applicant: KURARAY CO., LTD.

Inventor： Yuki INOUE ,  Takeshi Tsudaka ,  Satoshi Katsuya ,  Shohei Tsunofuri

IPC: D04H1/4326 ,  D04H1/551

CPC classification number: D04H1/4326 ,  D04H1/551

Abstract: Provided are: a fiber structure including two types of heat-crosslinkable thermoplastic resins; and a crosslinked molded body obtained by heat-crosslinking the thermoplastic resins with each other. The fiber structure includes at least a thermoplastic resin A and a thermoplastic resin B both heat-crosslinkable with each other. The thermoplastic resin A is an amorphous epoxy-type resin, and at least one of the thermoplastic resins A and B has a fiber shape.

公开(公告)号：US20230332350A1

公开(公告)日：2023-10-19

申请号：US18212929

申请日：2023-06-22

Applicant: KURARAY CO., LTD.

Inventor： Kazumasa KUSUDO ,  Satoshi Katsuya ,  Yoshifumi Aso ,  Shuhei Yorimitsu

IPC: D07B1/02 ,  D04C1/12

CPC classification number: D07B1/025 ,  D04C1/12 ,  D07B2201/2068 ,  D07B2201/102 ,  D07B2201/1096 ,  D07B2205/2042 ,  D07B2205/201 ,  D07B2205/205 ,  D07B2201/2041 ,  D07B2401/2055

Abstract: Provided is a double braid rope structure which is provided with an inner core and an outer cover. In the double braid rope structure (10), the inner core (3) includes high strength and high modulus fibers with a yarn tenacity of 20 cN/dtex or higher and a yarn elastic modulus of 400 cN/dtex or higher, and has a ratio of yarn length/rope length of 1.005 or more and 1.200 or less, the rope length being determined as a length of a cut section (V) cut to a certain length from the rope structure (10), and the yarn length being determined as an average value of lengths of yarns constituting the inner core of the cut section (V).

公开(公告)号：US20240417332A1

公开(公告)日：2024-12-19

申请号：US18706192

申请日：2022-10-31

Applicant: Kuraray Co., Ltd.

Inventor： Yoshinori Hitomi ,  Akira Imagawa ,  Atsuhisa Ogawa ,  Satoshi Katsuya ,  Saburo Hada

IPC: C04B35/80 ,  C04B14/28 ,  C04B16/06 ,  C04B28/02 ,  C04B111/00 ,  C04B111/40

Abstract: A porous formed plate includes 35 to 70% by mass of a substance not involved in a pozzolanic reaction; 20 to 61.5% by mass of a cement; 1 to 3% by mass of synthetic fibers; and 2.5 to 7% by mass of a pulp, wherein, in a pore size distribution of the formed plate that is determined by a mercury intrusion method, a ratio (B)/(A) of a pore volume (B) in a range of 6 to 560 nm with respect to a pore volume (A) in a range of 660 to 9,100 nm is 1.70 to 6.0.

公开(公告)号：US20200055276A1

公开(公告)日：2020-02-20

申请号：US16661044

申请日：2019-10-23

Applicant: KURARAY CO., LTD.

Inventor： Satoshi Katsuya ,  Yosuke Washitake ,  Ryokei Endo

IPC: B32B5/26 ,  B32B5/02 ,  D04H1/55

Abstract: Provided is a multilayer composite that has flame retardancy and low smoking property as well as has high physical characteristics. The multilayer composite has a multilayer structure and includes at least one core layer and at least one skin layer, wherein the multilayer composite satisfies all the following conditions (A) to (D): (A) the core layer is a composite including discontinuous reinforcing fibers and a first thermoplastic resin, in which the discontinuous reinforcing fibers are randomly dispersed and bonded with the first thermoplastic resin at least at intersections of the discontinuous reinforcing fibers; (B) the skin layer is a composite including continuous reinforcing fibers and a second thermoplastic resin, in which the continuous reinforcing fibers are impregnated with the second thermoplastic resin; (C) each of the first and the second thermoplastic resins has a limiting oxygen index of 30 or higher; and (D) the first and the second thermoplastic resins are miscible with each other.

公开(公告)号：US12297594B2

公开(公告)日：2025-05-13

申请号：US18212929

申请日：2023-06-22

Applicant: KURARAY CO., LTD.

Inventor： Kazumasa Kusudo ,  Satoshi Katsuya ,  Yoshifumi Aso ,  Shuhei Yorimitsu

IPC: D07B1/02 ,  D04C1/12

Abstract: Provided is a double rope structure which is provided with an inner core and an outer cover. In the double rope structure, the inner core includes high strength and high modulus fibers with a yarn tenacity of 20 cN/dtex or higher and a yarn elastic modulus of 400 cN/dtex or higher, and has a ratio of yarn length/rope length of 1.005 or more and 1.200 or less, the rope length being determined as a length of a cut section (V) cut to a certain length from the rope structure, and the yarn length being determined as an average value of lengths of yarns constituting the inner core of the cut section (V).

公开(公告)号：US11718718B2

公开(公告)日：2023-08-08

申请号：US16877716

申请日：2020-05-19

Applicant: KURARAY CO., LTD.

Inventor： Satoshi Katsuya ,  Yosuke Washitake ,  Ryokei Endo ,  Shunsuke Suiko

IPC: C08J5/04

CPC classification number: C08J5/042 ,  C08J2371/10 ,  C08J2379/02

Abstract: Provided is an expansive refractory material that not only has excellent fire resistance but also can provide a heat insulating function for protecting a content by expanding to form a heat insulating layer when the refractory material is brought close to a heat source or comes into contact with flame. The refractory material at least includes: discontinuous reinforcing fibers having a thermal conductivity of 4 W/(m·K) or higher; and a flame-retardant thermoplastic resin, wherein the discontinuous reinforcing fibers are dispersed in the refractory material. The refractory material has a post-expansion porosity of 30% or higher.

公开(公告)号：US11370195B2

公开(公告)日：2022-06-28

申请号：US16661044

申请日：2019-10-23

Applicant: KURARAY CO., LTD.

Inventor： Satoshi Katsuya ,  Yosuke Washitake ,  Ryokei Endo

IPC: B32B5/26 ,  B32B5/02 ,  D04H1/55 ,  B61D17/00 ,  B64C1/00

Abstract: Provided is a multilayer composite that has flame retardancy and low smoking property as well as has high physical characteristics. The multilayer composite has a multilayer structure and includes at least one core layer and at least one skin layer, wherein the multilayer composite satisfies all the following conditions (A) to (D): (A) the core layer is a composite including discontinuous reinforcing fibers and a first thermoplastic resin, in which the discontinuous reinforcing fibers are randomly dispersed and bonded with the first thermoplastic resin at least at intersections of the discontinuous reinforcing fibers; (B) the skin layer is a composite including continuous reinforcing fibers and a second thermoplastic resin, in which the continuous reinforcing fibers are impregnated with the second thermoplastic resin; (C) each of the first and the second thermoplastic resins has a limiting oxygen index of 30 or higher; and (D) the first and the second thermoplastic resins are miscible with each other.

公开(公告)号：US10683589B2

公开(公告)日：2020-06-16

申请号：US15468151

申请日：2017-03-24

Applicant: KURARAY CO., LTD.

Inventor： Tetsuya Okamoto ,  Akihiro Uehata ,  Satoshi Katsuya

IPC: D01F6/78 ,  D04H1/4326 ,  D04H1/46 ,  D01F1/04 ,  D01F6/74 ,  D01D1/02 ,  D01D5/08

Abstract: Provided is a polyetherimide-based fiber containing a polyetherimide resin and carbon black dispersed in the resin, wherein the content of the carbon black is 0.03 wt % or greater; the carbon black has a primary particle number-mean particle size of from 30 nm to 500 nm; and the fiber has a weight reduction rate of less than 0.5% around the glass transition point (Tg) of the polyetherimide resin, where the weight reduction rate is defined by a following formula (1). Weight reduction rate (%)={[(fiber weight at temperature T1)−(fiber weight at temperature T2)]/(fiber weight at temperature T1)}×100  (1) Where T1 denotes a temperature (Tg−15° C.) that is 15° C. lower than the glass transition point (glass transition temperature) of the polyetherimide resin, and T2 denotes a temperature (Tg+25° C.) that is 25° C. higher than the glass transition point.