公开(公告)号：US20210054113A1

公开(公告)日：2021-02-25

申请号：US16965481

申请日：2019-01-28

申请人： KURARAY CO., LTD.

发明人： Takuro NIIMURA ,  Masashi AKARI ,  Hiroshi OZAWA

IPC分类号： C08F6/22 ,  C08F265/06 ,  C08F220/18 ,  C08F2/24

摘要： The present invention provides a multilayered acrylic polymer coagulate characterized in that the coagulate has a bulk density of 0.3 to 0.6 g/cm3 and a median diameter of 50 to 400 μm and contains particles having a particle diameter of 75 or less in a proportion of 50% or less, and the amount of alkali metal and alkaline earth metal contained in the coagulate satisfies the following formula (1): Σ(N/a)×(120−Tg)≤100   (1) wherein N represents the amount of alkali metal and alkaline earth metal contained in the coagulate (mmol/kg); Tg represents the glass transition temperature (° C.) of the acetone-soluble matter of the coagulate; and a represents the valency of the alkali metal and alkaline earth metal contained in the coagulate.

公开(公告)号：US20220260774A1

公开(公告)日：2022-08-18

申请号：US17630686

申请日：2020-07-29

申请人： KURARAY CO., LTD.

发明人： Masashi AKARI ,  Katsuhiro FUJITA ,  Ryuichi IWAKAWA

IPC分类号： G02B6/02 ,  C09K11/06 ,  G01T1/20

摘要： A plastic wavelength shifting fiber includes a core containing a fluorescent agent having a peak of a fluorescence spectrum in a wavelength range of 450 to 550 nm, and a cladding covering an outer peripheral surface of the core and has a refractive index lower than that of the core. A sum of the number of carbon and oxygen atoms of the fluorescent agent is 10 to 25, and a quantum yield QE of the fluorescent agent and an overlap parameter OL thereof defined by Formula (2) satisfy Formula (1): OL×(1−QE)

公开(公告)号：US20220091325A1

公开(公告)日：2022-03-24

申请号：US17421792

申请日：2020-01-08

申请人： KURARAY CO., LTD.

发明人： Masashi AKARI ,  Katsuhiro FUJITA

IPC分类号： G02B6/02 ,  G01T1/203 ,  G01D5/26

摘要： A plastic scintillating fiber capable of detecting radiation having a weakly penetrating property is provided. A plastic scintillating fiber according to an aspect of the present invention includes a plastic optical fiber, and further includes a core containing at least one type of a fluorescent agent, a cladding layer having a refractive index lower than that of the core disposed at a center, and an outermost layer covering an outer peripheral surface of the cladding layer. The outermost layer contains a base material that generates scintillation light, and at least one type of a fluorescent agent that converts the scintillation light into light having a wavelength longer than that of the scintillation light.