公开(公告)号：US09982368B2

公开(公告)日：2018-05-29

申请号：US14798994

申请日：2015-07-14

Applicant: KURARAY CO., LTD.

Inventor： Akihiro Uehata ,  Tetsuya Okamoto ,  Takayuki Ikeda

IPC: D01F6/62 ,  C08J5/04 ,  D01D5/08 ,  D01F6/74 ,  D01F6/94 ,  D01F1/04 ,  D01F1/10 ,  D01F1/06

CPC classification number: D01F6/62 ,  C08J5/04 ,  C08J2367/03 ,  C08J2379/08 ,  C08J2467/03 ,  C08J2479/08 ,  D01D5/08 ,  D01F1/04 ,  D01F1/06 ,  D01F1/106 ,  D01F6/74 ,  D01F6/94 ,  Y10T428/249921

Abstract: Provided is a flame-retardant fiber having improved light resistance and/or colorability. The flame-retardant fiber is a fiber including a fiber-forming polymer. The fiber-forming polymer contains a polymer blend comprising a polyetherimide polymer (A) and a thermoplastic polymer (B) having a glass transition temperature lower than that of the polymer (A); and the fiber-forming polymer further contains a functional additive (C) that provides light resistance, colorability, or both of light resistance and colorability. The mass ratio (A)/(B) of the polymer (A) to the polymer (B) is from 50/50 to 90/10, and the content of the functional additive (C) is from 0.5 to 10% by mass relative to 100% by mass of the total mass (A+B+C) of the polymer (A), the thermoplastic polymer (B), and the functional additive (C).

公开(公告)号：US11440289B2

公开(公告)日：2022-09-13

申请号：US16784537

申请日：2020-02-07

Applicant: KURARAY CO., LTD.

Inventor： Tetsuya Okamoto ,  Yasuhiro Shirotani

IPC: B32B5/26 ,  B32B5/02 ,  B32B37/04 ,  B32B37/26 ,  D01D5/08 ,  D01D5/092 ,  D01D13/00 ,  D04H3/011 ,  D04H3/16

Abstract: Provided are a melt blown (MB) nonwoven fabric, a laminate using the same, a method of producing a melt blown nonwoven fabric as well as a melt blowing apparatus. A melt blowing apparatus 100 includes a die 10 configured to discharge a resin melt 42 with an accompanying jet to give fiber materials, a hollow cover 20, and a collector 60. The fiber materials 50 from the die 10 are heated to a temperature equal to or higher than a crystallization temperature of crystalline thermoplastic resin inside the hollow cover 20 and collected on a collecting surface 62 of the collector 60. The hollow cover 20 and the collector 60 are separated by a distance of 5 cm or longer between a lower edge 28 of the hollow cover 20 and the collecting surface 62 in a line extending downwardly from the nozzle holes 12 in a vertical direction.

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.