Komaki, Japan
Komaki, Japan

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Patent
Sumitomo Riko Company Ltd | Date: 2017-02-01

A urethane bumper spring is produced from a urethane raw material containing a polyester-based polyol as a polyol component and diphenylmethane diisocyanate as an isocyanate component, and includes: a skin layer; and a core portion, in which the skin layer has a density (Da) and a foamed cell diameter (Ra), and the core portion has a density (Db) and a foamed cell diameter (Rb). The density (Da), the foamed cell diameter (Ra), the density (Db), and the foamed cell diameter (Rb) satisfy relationships shown in the following expressions: 1.0Da/Db<1.34 (1) and 0.53


A dielectric material for a transducer (1) is manufactured from a composition that includes metal oxide particles having hydroxy groups, a rubber polymer having a functional group capable of reacting with an epoxy group, a bisphenol type epoxy resin, both ends of which have an epoxy group, and a cross-linking agent. In the dielectric material for a transducer (1), the metal oxide particles (12) are bound to the rubber polymer (10) via the bisphenol type epoxy resin (11). A transducer (2) includes a dielectric layer (20) made of the dielectric material for a transducer (1) and a plurality of electrodes (21a, 21b) arranged with the dielectric layer (20) interposed therebetween.


Patent
Sumitomo Riko Company Ltd and Kyushu University | Date: 2016-01-22

A dielectric film includes an elastomer and nanoparticles dispersed in the elastomer while chemically bound to the elastomer. The nanoparticles have cyano groups and are manufactured by a sol-gel process using an organometallic compound. A method for manufacturing a dielectric film includes: producing a chelate compound of an organometallic compound; producing a sol of metallic oxide particles having cyano groups by adding a silane coupling agent having a cyano group, an organic solvent, and water to the chelate compound; preparing a mixed solution by mixing the sol of the metallic oxide particles having cyano groups and a polymer solution containing a rubber polymer having a functional group capable of reacting with a hydroxy group; and forming a dielectric film by applying the mixed solution to a substrate and by curing a coating film.


Patent
Kyushu University and Sumitomo Riko Company Ltd | Date: 2016-04-22

A joint-movement assisting device including: (i) an assist force control member to adjust an output level of a driving member in order to bring a load acting on an assist force transmission part to a targeted assist force during action of an assist force; (ii) a slack prevention control member to operate the driving member and exert a bias force on the assist force transmission part in order to eliminate a slack thereof during non-action of the assist force; and a load sensor to detect the load acting on the assist force transmission part in a direction of tension. For at least one of the assist force control member and the slack prevention control member, the driving member is feedback-controlled based on a detection value by the load sensor in order to bring the acting load to the targeted assist force or bias force.


Patent
SUMITOMO RIKO COMPANY Ltd | Date: 2016-09-13

There is provided a charging member (1) capable of improving adhesion of an elastic layer (3) with a surface layer (4), which is used for an electrophotographic image forming device. The charging member (1) has a shaft body (2) having conductivity, the elastic layer (3) having conductivity which is formed along the outer circumference of the shaft body (2), and the surface layer (4) formed along the outer circumference of the elastic layer (3). The elastic layer (3) contains a rubber and a calcium carbonate having a spindle shape. The surface layer (4) is composed of a cured material of a composition containing a matrix polymer, a polyisocyanate having two or more isocyanate groups in a molecule, and a porous particle. The calcium carbonate in the elastic layer (3) exists more at a side closer to the surface layer (4) than at a side closer to the shaft body (2).


Patent
SUMITOMO RIKO COMPANY Ltd | Date: 2016-08-10

Provided is a resin composition for gas injection molding including polyamide resin, inorganic filler having a pH of 9 or more and an average particle diameter of 20 nm or less, and inorganic fibers having a number-average fiber length of from 50 m to 400 m. In addition, a pipe formed by subjecting the resin composition to gas injection molding has, in an inside thereof, a hollow continuous portion for a fluid flow path. Therefore, in the gas injection molding of the pipe using the resin composition, an inner peripheral surface of the pipe can be finished into a smooth flat surface, and even when a liquid having acidity is circulated in the hollow continuous portion of the pipe, the pipe can withstand the acidity.


Patent
Sumitomo Riko Company Ltd | Date: 2016-08-11

A urethane bumper spring is produced from a urethane raw material containing a polyester-based polyol as a polyol component and diphenylmethane diisocyanate as an isocyanate component, and includes: a skin layer; and a core portion, in which the skin layer has a density (Da) and a foamed cell diameter (Ra), and the core portion has a density (Db) and a foamed cell diameter (Rb). The density (Da), the foamed cell diameter (Ra), the density (Db), and the foamed cell diameter (Rb) satisfy relationships shown in the following expressions: 1.0Da/Db<1.34 (1) and 0.53


Patent
SUMITOMO RIKO COMPANY Ltd | Date: 2016-09-01

A posture determination device for determining a users posture including: a plurality of pressure detection parts disposed in a matrix arrangement on a human body support surface of bedding; a pressure sensing center calculation member to calculate a pressure sensing center of the pressure detection parts based on output values of the pressure detection parts; a determination area setting member to set at least one determination area around the calculated pressure sensing center; and a posture determination member to determine the posture based on distribution condition of the output values of the pressure detection parts within the determination area.


Patent
SUMITOMO RIKO COMPANY Ltd | Date: 2016-02-05

A fuel hose excellent in calcium chloride resistance, can achieve both low fuel permeability and a pulsation-reducing property, and is excellent in interlayer adhesiveness as well. The fuel hose includes: an inner layer (1) formed of a specific resin, such as polyamide 9T; an intermediate layer (2) formed of the following component (B), which is arranged in contact with an outer peripheral surface of the inner layer (1); and an outer layer (3) formed of the following component (C), which is arranged in contact with an outer peripheral surface of the intermediate layer (2), in which the layers are bonded to each other: (B) a polyamide terpolymer having copolymerized therein the following components (b1), (b2), and (b3): (b1) polyamide 6; (b2) at least one selected from polyamide 66 and polyamide 610; and (b3) polyamide 12; (C) an aliphatic polyamide resin except for polyamide 6 and polyamide 66.


Patent
SUMITOMO RIKO COMPANY Ltd | Date: 2016-01-15

A paper feed roller including an elastic layer composed of thermosetting polyurethane containing a plasticizer, wherein an amount of the plasticizer is within a range of 10 to 50 pts. mass based on 100 pts. mass of the thermosetting polyurethane, and a surface residual charge on the elastic layer is within a range of 90 to 170 V. The surface residual charge is a value determined by single-point measurement of a surface potential of the elastic layer. The measurement includes rotating the paper feed roller in a circumferential direction, electrifying the surface of the elastic layer with a corotron while rotating the paper feed roller, and measuring the surface potential at a center point on the paper feed roller in a roller axis direction in a position where the paper feed roller is rotated by 90 degrees from a position where the surface of the elastic layer is electrified.

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