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41. 发明授权

US11237305B2 Diffuser plate 有权
公开(公告)号：US11237305B2
公开(公告)日：2022-02-01
申请号：US16971540
申请日：2019-02-15
申请人： KURARAY CO., LTD.
发明人： Keisuke Ikeda , Atsushi Uchida , Masaru Karai
IPC分类号： G02B5/02 , G02B3/00 , G02B27/48
摘要： Provided is a diffuser plate that makes it possible to mitigate unevenness of luminance or unevenness of color while suppressing speckle noise of transmitted light or reflected light. The diffuser plate of the present invention includes a microlens array having a structure that creates an optical path length difference for incident light or reflected light, the microlenses having the same effective diameter. The microlens array constitutes a basic block structure in which periodic arrangement is provided with a period of an integer multiple of the effective diameter, a two-dimensional second periodic structure having a period that is N times the period of the microlens array in the basic periodic structure is configured by a repetitive arrangement of the basic blocks, and the microlenses are set to create an optical path length difference based upon a specific arrangement within the basic block structure.

42. 发明申请

US20220025553A1 COMPOSITE FIBER 有权
公开(公告)号：US20220025553A1
公开(公告)日：2022-01-27
申请号：US17299369
申请日：2019-12-04
申请人： KURARAY CO., LTD.
发明人： Shoji ONOGI , Takayuki IKEDA , Shinya KAWAKADO , Hitoshi NAKATSUKA
IPC分类号： D01F8/16 , C08L53/02 , C08L75/04
摘要： The present invention relates to a composite fiber for obtaining a fiber having a strength at 100% elongation of 0.04 cN/dtex or less, wherein the composite fiber is composed of component X comprising a polyvinyl-based thermoplastic elastomer, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0° C. or lower, and component Y which is an easily soluble thermoplastic polymer, wherein the composite ratio (mass ratio) X:Y of the component X and the component Y is within the range of from 90:10 to 50:50, and wherein the composite fiber has a core-sheath structure in which the component X constitutes the core component, and the component Y constitutes the sheath component, in a cross section of the fiber.

43. 发明申请

US20220010082A1 METHOD FOR PRODUCING POLYVINYL ACETAL RESIN FILM CONTAINING PLASTICIZER ABSORBED THEREIN 有权
公开(公告)号：US20220010082A1
公开(公告)日：2022-01-13
申请号：US17279425
申请日：2019-09-25
申请人： KURARAY CO., LTD.
发明人： Koichiro ISOUE
IPC分类号： C08J5/18 , C08K5/00 , C08K5/06 , C08K5/10 , C08L31/04 , B32B17/10 , B32B27/08 , B32B27/22 , B32B27/30
摘要： The present invention relates to a method for producing a polyvinyl acetal resin film containing a plasticizer absorbed therein, comprising: a contact step of bringing a liquid plasticizer into contact with a polyvinyl acetal resin film; and a heating step of heating the polyvinyl acetal resin film that has been contacted with the liquid plasticizer, wherein an amount of a plasticizer in the polyvinyl acetal resin film before the contact step is 0 to 20% by mass based on a total mass of the polyvinyl acetal resin film.

44. 发明申请

US20220002161A1 CARBONACEOUS MATERIAL, METHOD FOR PRODUCING SAME, ELECTRODE ACTIVE MATERIAL FOR ELECTROCHEMICAL DEVICE, ELECTRODE FOR ELECTROCHEMICAL DEVICE, AND ELECTROCHEMICAL DEVICE 有权
公开(公告)号：US20220002161A1
公开(公告)日：2022-01-06
申请号：US17291676
申请日：2019-11-07
申请人： KURARAY CO., LTD.
发明人： Hiroyuki NISHINAMI , Yumika NISHITA , Shushi NISHIMURA
IPC分类号： C01B32/336
摘要： The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g and a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m2.

45. 发明授权

US11214696B2 Multilayer structure and method for producing same, coating liquid, packaging material, and protective sheet for electronic devices 有权
公开(公告)号：US11214696B2
公开(公告)日：2022-01-04
申请号：US16302422
申请日：2017-05-17
申请人： KURARAY CO., LTD.
发明人： Ryoichi Sasaki , Yasushi Morihara , Masahiko Ota , Masakazu Nakaya , Hiroyuki Ogi
IPC分类号： C09D7/63 , B32B9/00 , C09D7/61 , A61J1/10 , B32B9/04 , B32B9/06 , B65D65/40 , B65D65/42 , B65D81/20
摘要： The present invention relates to a multilayer structure including a base (X) and a layer (Y), wherein the layer (Y) includes an aluminum-containing compound (A) and a phosphorus compound (BH) in which a phosphorus atom having at least one hydroxy group and a polar group are bonded via an alkylene chain having 3 to 20 carbon atoms or a polyoxyalkylene chain based on an alkylene having 3 to 20 carbon atoms, and the aluminum-containing compound (A) is a compound (Ab) including a reaction product (D) of an aluminum-containing metal oxide (Aa) and an inorganic phosphorus compound (BI).

46. 发明申请

US20210403697A1 POLYVINYL ACETAL RESIN FILM AND FILM ROLL THEREOF, AND LAMINATE COMPRISING SAME 有权
公开(公告)号：US20210403697A1
公开(公告)日：2021-12-30
申请号：US17279427
申请日：2019-09-25
申请人： KURARAY CO., LTD.
发明人： Yoshiaki ASANUMA , Koichiro ISOUE
IPC分类号： C08L29/14 , C08J5/18 , B32B17/10 , B29C48/00
摘要： The present invention relates to a polyvinyl acetal resin film, comprising a polyvinyl acetal resin material, wherein the polyvinyl acetal resin film has a thickness of 5 to 350 μm, and satisfies the following Formulae (1) and (2) where, comparing one surface and the other surface, a mean value of the 10-point average roughness of a rougher surface A and a mean value of the 10-point average roughness of a smoother surface B are defined as Rz1(a) μm and Rz2(a) μm, respectively: Rz1(a)>1.1×Rz2(a) (1) 3>Rz2(a) (2), a value obtained by dividing the standard deviation of the 10-point average roughness of the surface A by Rz1(a) and a value obtained by dividing the standard deviation of the 10-point average roughness of the surface B by Rz2(a) are each 0 to 0.30, a viscosity of a toluene/ethanol (1:1, mass ratio) solution containing 10%-by-mass of a polyvinyl acetal resin contained in the polyvinyl acetal resin material, which is measured at 20° C. and 30 rpm using a Brookfield-type (B-type) viscometer, is 100 to 1,000 mPa·s, and the amount of a plasticizer in the polyvinyl acetal resin film is 0 to 20% by mass based on a total mass of the polyvinyl acetal resin film.

47. 发明申请

US20210380864A1 POLYVINYL ALCOHOL-BASED PARTICULATE COMPOSITIONS 有权
公开(公告)号：US20210380864A1
公开(公告)日：2021-12-09
申请号：US17327291
申请日：2021-05-21
申请人： Kuraray Co., Ltd.
发明人： Ghebrehiwet Ghebremeskel , Takuma Kaneshima , Keisuke Morikawa , Amanda Reneau
IPC分类号： C09K8/508 , E21B33/138
摘要： Disclosed are particulate compositions comprising particles of a blend of one or more polyvinyl alcohol polymers with one or more aliphatic polyester polymers, wherein such particulate compositions are useful, for example, as plugging agents for treatments applied to a subterranean formation traversed by the borehole of an oil or gas well.

48. 发明授权

US11174327B2 Method for producing modified polyvinyl alcohol resin 有权
公开(公告)号：US11174327B2
公开(公告)日：2021-11-16
申请号：US16627155
申请日：2018-06-28
申请人： KURARAY CO., LTD.
发明人： Masahiro Baba , Toshinori Kato
IPC分类号： C08F8/28
摘要： There is provided a method for producing a modified polyvinyl alcohol resin, comprising step (A) of acetalizing polyvinyl alcohol particles swollen with a solvent capable of swelling the polyvinyl alcohol particles by reacting them with a carbonyl compound and/or an acetalized carbonyl compound in the presence of the solvent, wherein a content of an organic solvent in the solvent is 5% by mass or more.

49. 发明申请

US20210347094A1 Poly(Vinyl Alcohol) Mold Release Film for Artificial Marble Molding Use, and Method for Producing Artificial Marble Using Same 有权
公开(公告)号：US20210347094A1
公开(公告)日：2021-11-11
申请号：US17274261
申请日：2019-09-06
申请人： KURARAY CO., LTD.
发明人： Osamu Kazeto , Takashi Nerio , Masahiro Takafuji
IPC分类号： B29C33/68
摘要： Disclosed is a mold release film that is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, and then solidified and molded. The mold release film is a polyvinyl alcohol film and is characterized by being a polyvinyl alcohol mold release film for artificial marble molding use that satisfies the following formula (1). Due to this, it is possible to provide a polyvinyl alcohol mold release film for artificial marble molding use capable of, even in the production of wide artificial marble, suppressing wrinkles or curls generated at both end parts to prevent the surface shape of the resulting artificial marble from being defective, and simplifying the step of grinding and polishing artificial marble, and a method for producing artificial marble using the same. 4.6×10−3≥Δn(MD)0−1.4×10−3≥Δn(TD)0≥1.0×10−3 (1) in the formula (1), Δn(MD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the machine direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film, and Δn(TD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the transverse direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film.

50. 发明申请

US20210340377A1 THERMOPLASTIC RESIN COMPOSITION 有权
公开(公告)号：US20210340377A1
公开(公告)日：2021-11-04
申请号：US17272816
申请日：2019-09-04
申请人： KURARAY CO., LTD.
发明人： Nobuhiro OYA , Kensuke KAMOSHIDA , Atsushi NANYA
IPC分类号： C08L77/06
摘要： A thermoplastic resin composition containing 3 to 10 parts by mass of a modified polyolefin (B) having a melt flow rate (MFR) at a temperature of 240° C. and under a load of 2.16 kg of 0.1 to 0.6 g/10 min, relative to 100 parts by mass of a thermoplastic resin (A) having a melting point of 270° C. or higher therein. Preferably, the modified polyolefin (B) has a 1% decomposition temperature of 300 to 450° C. Preferably, the thermoplastic resin (A) is a polyamide resin.

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