Abstract: The present invention aims to provide a viscosity index improver composition capable of providing a lubricant composition that has an excellent viscosity index improving effect, excellent antifoaming properties, and excellent persistence of the antifoaming properties. The present invention relates to a viscosity index improver composition, containing: a (co)polymer (A) containing a monomer (a) represented by the following formula (1) as an essential monomer; a C18-C40 chain aliphatic alcohol (B); and a base oil, wherein R1 is a hydrogen atom or a methyl group; -X1- is a group represented by —O— or —NH—; R2 is a C2-C4 alkylene group; R3 and R4 are each independently a C8-C24 linear or branched alkyl group; and p is an integer of 0 to 20, with each R2 being optionally the same as or different from each other when p is 2 or greater.

Abstract: The present invention aims to provide a viscosity-index improving agent having an excellent friction reduction effect to reduce friction of a lubricating oil composition when the viscosity-index improving agent is added thereto. The present also aims to provide a lubricating oil composition containing the viscosity-index improving agent. The present invention relates to, for example, a viscosity-index improving agent containing: (co)polymer (A) containing, as an essential constituent monomer, a polyolefin-based monomer (a) represented by the following formula (1); an ester oil (B1) having a kinematic viscosity at 100° C. of 1.00 to 2.50 mm2/s; and an ester oil (B2) having a kinematic viscosity at 100° C. of 2.51 to 5.

Abstract: The present invention aims to provide a viscosity-index improving agent capable of providing a lubricating oil composition having an appropriate gelation index, an excellent HTHS viscosity at 100° C., and an excellent kinematic viscosity at 40° C. when the viscosity-index improving agent is added thereto. The present also aims to provide a lubricating oil composition containing the viscosity-index improving agent.

Abstract: A method of measuring thickness of a liquid layer includes applying a light beam to a liquid layer disposed on a surface of a member, detecting reflected light by a sensor, and analyzing the reflected light according to a spectral interference method with a curve fitting technique to determine the thickness of the liquid layer.

Abstract: The communication plate has a first layer that defines a wall surface of the communication flow channel, a second layer stacked on a side of the first layer opposite to the wall surface, and a third layer stacked on a side of the second layer opposite to the first layer, and the thermal expansion coefficient of the second layer is smaller than the thermal expansion coefficient of the first layer and is smaller than the thermal expansion coefficient of the third layer.

Abstract: A method of measuring thickness of a liquid layer includes applying a light beam to a liquid layer disposed on a surface of a member, detecting reflected light by a sensor, and analyzing the reflected light according to a spectral interference method with a curve fitting technique to determine the thickness of the liquid layer.

Abstract: The communication plate has a first layer that defines a wall surface of the communication flow channel, a second layer stacked on a side of the first layer opposite to the wall surface, and a third layer stacked on a side of the second layer opposite to the first layer, and the thermal expansion coefficient of the second layer is smaller than the thermal expansion coefficient of the first layer and is smaller than the thermal expansion coefficient of the third layer.

Abstract: A nip roller includes a core material having a surface coated with rubber. The nip roller having a support length L1 of 5 m or longer. The rubber surface has a hardness H (deg) equal to or lower than 65 deg as measured by a JIS K6253 Type A durometer (A type). Mass W (kg) of the nip roller and second moment of area I1 (m4) and the Young's modulus E1 (Pa) of the core material satisfy E1I1/W?80000.

Abstract: A nip roller includes a core material having a surface coated with rubber. The nip roller having a support length L1 of 5 m or longer. The rubber surface has a hardness H (deg) equal to or lower than 65 deg as measured by a JIS K6253 Type A durometer (A type). Mass W (kg) of the nip roller and second moment of area I1 (m4) and the Young's modulus E1 (Pa) of the core material satisfy E1I1/W?80000.

Abstract: A silicon nozzle plate has excellent liquid resistance on an inner surface of a nozzle opening and a discharge surface. A plurality of the nozzle openings are disposed in a silicon substrate of the nozzle plate. A tantalum oxide film formed by atomic layer deposition is disposed on both surfaces of the silicon substrate and the inner surface of the nozzle opening.

Abstract: A liquid ejecting head suppresses erosion of silicon substrates by liquid, and whereby suppresses leakage of liquid, discharging failure of liquid droplets, and peeling-off of laminated substrates. The liquid ejecting head includes at least a nozzle plate on which nozzle openings for discharging liquid are provided, and a flow path formation substrate on which a pressure generation chamber communicating with the nozzle openings is provided. The nozzle plate is formed with a silicon substrate. At least the flow path formation substrate and the nozzle plate are bonded to each other after providing a tantalum oxide film formed by atomic layer deposition on the entire surfaces including a bonded surface.

Abstract: According to a liquid ejecting head, it is possible to suppress erosion of a vibrating plate by liquid, suppress generation of variation in a vibrating property, and realize a thin head. The liquid ejecting head includes a flow path formation substrate on which a pressure generation chamber communicating with nozzle openings for discharging liquid is provided, an elastic film which is provided on one surface side of the flow path formation substrate and seals the pressure generation chamber, and a piezoelectric actuator which is a pressure generation unit which is provided on the elastic film to deform the elastic film. A tantalum oxide film which is formed by atomic layer deposition is provided at least on an inner wall of the pressure generation chamber.

Abstract: A silicon nozzle plate has excellent liquid resistance on an inner surface of a nozzle opening and a discharge surface. A plurality of the nozzle openings are disposed in a silicon substrate of the nozzle plate. A tantalum oxide film formed by atomic layer deposition is disposed on both surfaces of the silicon substrate and the inner surface of the nozzle opening.

Abstract: A liquid ejecting head suppresses erosion of silicon substrates by liquid, and whereby suppresses leakage of liquid, discharging failure of liquid droplets, and peeling-off of laminated substrates. The liquid ejecting head includes at least a nozzle plate on which nozzle openings for discharging liquid are provided, and a flow path formation substrate on which a pressure generation chamber communicating with the nozzle openings is provided. The nozzle plate is formed with a silicon substrate. At least the flow path formation substrate and the nozzle plate are bonded to each other after providing a tantalum oxide film formed by atomic layer deposition on the entire surfaces including a bonded surface.

Abstract: According to a liquid ejecting head, it is possible to suppress erosion of a vibrating plate by liquid, suppress generation of variation in a vibrating property, and realize a thin head. The liquid ejecting head includes a flow path formation substrate on which a pressure generation chamber communicating with nozzle openings for discharging liquid is provided, an elastic film which is provided on one surface side of the flow path formation substrate and seals the pressure generation chamber, and a piezoelectric actuator which is a pressure generation unit which is provided on the elastic film to deform the elastic film. A tantalum oxide film which is formed by atomic layer deposition is provided at least on an inner wall of the pressure generation chamber.

Abstract: A bonding method includes: preparing a first base material and a second base material to be bonded to each other via a bonding film; forming a liquid coating by supplying a polyester-modified silicone material-containing liquid material onto at least one of the first base material and the second base material, the polyester-modified silicone material being a product of dehydrocondensation reaction between a polyester resin obtained by esterification reaction of trimethylolpropane with terephthalic acid and a silicone material that has a branched polyorganosiloxane backbone having a unit structure represented by chemical formula (1) below at a branched portion, a unit structure represented by at least one of chemical formulae (2) and (3) below at a linking portion, and a unit structure represented by at least one of chemical formulae (4) and (5) below at a terminal portion, wherein R1 each independently represents a methyl group or a phenyl group, and X represents a siloxane residue; drying and/or curing t

Abstract: A bonding method includes: forming a liquid coating by supplying a polyester-modified silicone material-containing liquid material onto at least one of a first base material and a second base material prepared beforehand to be bonded to each other via a bonding film, the polyester-modified silicone material being a product of dehydrocondensation reaction between a polyester resin obtained by esterification reaction of trimethylolpropane with terephthalic acid and a silicone material that has a branched polyorganosiloxane backbone having a unit structure represented by chemical formula (1) below at a branched portion, a unit structure represented by at least one of chemical formulae (2) and (3) below at a linking portion, and a unit structure represented by at least one of chemical formulae (4) and (5) below at a terminal portion, wherein R1 each independently represents a methyl group or a phenyl group, and X represents a siloxane residue; drying and/or curing the liquid coating to obtain the bonding film

Abstract: A bonding method includes: forming a liquid coating by supplying a polyester-modified silicone material-containing liquid material onto at least one of a first base material and a second base material prepared beforehand to be bonded to each other via a bonding film; drying and curing the liquid coating to obtain a bonding film on at least one of the first base material and the second base material; imparting energy to the bonding film to develop adhesion near a surface of the bonding film; and contacting the first base material and the second base material via the bonding film so as to obtain a bonded structure in which the first base material and the second base material are bonded to each other via the bonding film.

Abstract: A bonding method includes applying a liquid material containing silicone materials to at least one of the first base member and the second base member so as to form a liquid film, drying the liquid film so as to obtain a bonding film on the at least one of the first base member and the second base member, heating the bonding film so as to cross-link the silicone materials contained in the bonding film to each other, and applying energy to the bonding film so as to develop adhesiveness around a surface of the bonding film so as to obtain a bonded body in which the first base member and the second base member are bonded to each other with the bonding film interposed between the first base member and the second base member.

Abstract: A bonding method includes: a) applying a liquid material containing a silicone material to at least one of the first base member and the second base member so as to form a liquid film on the at least one of the base members; b) drying the liquid film so as to obtain the bonding film on the at least one of the first base member and the second base member; c) bringing plasma into contact with the bonding film so as to develop adhesiveness around a surface of the bonding film; and d) bringing the first base member and the second base member into contact with each other in a manner to interpose the bonding film on which adhesiveness is developed therebetween so as to obtain a bonded body in which the first base member and the second base member are bonded to each other with the bonding film interposed therebetween.