公开(公告)号：US20190218697A1

公开(公告)日：2019-07-18

申请号：US16368190

申请日：2019-03-28

申请人： KURARAY CO., LTD.

发明人： Kimio NAKAYAMA ,  Nobuo TAKAOKA ,  Mitsuru KATO ,  Hirofumi KIKUCHI

IPC分类号： D04H3/016 ,  B24B37/24 ,  D04H3/10

CPC分类号： D04H3/016 ,  B24B37/24 ,  D04H3/10

摘要： Disclosed herein is a method for manufacturing a polishing pad, including the step of filling the interior of bundles of ultrafine fibers which have an average fineness of from 0.01 to 0.8 dtex with a polymeric elastomer having a glass transition temperature of −10° C. or below, storage moduli at 23° C. and 50° C. of from 90 to 900 MPa, and a water absorption ratio, when saturated with water at 50° C. of from 0.2 to 5 mass %. Also disclosed herein are polishing pads obtained by the method above.

公开(公告)号：US20200071880A1

公开(公告)日：2020-03-05

申请号：US16492995

申请日：2018-04-24

申请人： KURARAY CO., LTD.

发明人： Kimio NAKAYAMA ,  Hayaki SATO ,  Naoto NARUMOTO

IPC分类号： D06N3/04 ,  D06N3/00

摘要： Disclosed is an artificial leather base material including: a fabric, and an elastic polymer, fine particles, and a plasticizer that have been applied to the fabric, wherein the elastic polymer includes a (meth)acrylic elastic polymer and a polyurethane, the fine particles have a Mohs hardness of 4 or less, and the product of a bending resistance, a durometer Shore C hardness, and a thickness of the artificial leather base material is 200 to 400 mm2. Also disclosed is a grain-finished artificial leather obtained using the artificial leather base material.

公开(公告)号：US20220074133A1

公开(公告)日：2022-03-10

申请号：US17415877

申请日：2019-11-28

申请人： KURARAY CO., LTD.

发明人： Kimio NAKAYAMA ,  Akihisa IWAMOTO ,  Masashi MEGURO

IPC分类号： D06N3/00

摘要： Disclosed is a napped artificial leather including: a fiber-entangled body including ultrafine fibers having a fineness of 0.5 dtex or less; and an elastic polymer impregnated into the fiber-entangled body, the napped artificial leather having a thickness of 0.25 to 1.5 mm, and including a main surface that is a napped surface formed by napping the ultrafine fibers. The napped artificial leather further includes phosphorous-based flame retard ant particles attached to the elastic polymer such as a polyurethane, the phosphorous-based flame retardant particles being locally present in a range of a thickness of 200 pm or less from a back surface opposite to the main surface. The phosphorous-based flame retardant particles have an average particle size of 0.1 to 30 μm, a phosphorus atom content of 14 mass % or more, and a solubility in water at 30° C. of 0.2 mass % or less, and a melting point, or, in the absence of a melting point, a decomposition temperature, of 150° C. or more, and a content ratio of the phosphorous-based flame retardant particles is 1 to 6 mass % as a content ratio in terms of phosphorus atoms.

公开(公告)号：US20220018061A1

公开(公告)日：2022-01-20

申请号：US17414367

申请日：2019-11-05

申请人： KURARAY CO., LTD.

发明人： Hiroyuki HISHIDA ,  Kimio NAKAYAMA ,  Michinori FUJISAWA ,  Kazumasa INOUE

IPC分类号： D06N3/00 ,  C09D5/02

摘要： Disclosed is a colored napped artificial leather including: a fiber-entangled body including ultrafine fibers having an average single fiber fineness of 0.5 dtex or less; and an elastic polymer impregnated into the fiber-entangled body, the napped artificial leather having, at least on one side thereof, a napped surface formed by napping the ultrafine fibers, wherein the napped artificial leather further includes particles of a fatty acid amide-based compound that are at least attached to surfaces of the ultrafine fibers and that have an average particle size of 0.1 to 10 μm.

公开(公告)号：US20190153666A1

公开(公告)日：2019-05-23

申请号：US16097514

申请日：2017-04-28

申请人： KURARAY CO., LTD.

发明人： Kimio NAKAYAMA ,  Naoto NARUMOTO

IPC分类号： D06N3/00

摘要： Disclosed is a grain-finished artificial leather including: an artificial leather base material; and a resin layer stacked on at least one surface of the artificial leather base material, wherein the artificial leather base material contains: a fiber-entangled body of ultrafine fibers; 3 to 50 mass % of a first elastic polymer; 2.5 to 6 mass %, in terms of phosphorus atoms, of first phosphorous-based flame retardant particles having an average particle size of 1 to 10 μm; and 1 to 6 mass % of a plasticizer, and the resin layer contains: a second elastic polymer; and a total content, in terms of phosphorus atoms or in terms of hydroxyl groups, of 0 to 8 mass % of flame retardant particles having an average particle size of 1 to 10 μm and being at least one selected from the group consisting of second phosphorous-based flame retardant particles and first metal hydroxide particles.