Abstract: A wiring substrate includes a first insulating layer, a first conductor layer, and a plurality of filled vias. The first insulating layer has a first surface and a second surface positioned on a side opposite to the first surface. The first conductor layer is formed on the first surface of the first insulating layer. The plurality of filled vias are formed inside the first insulating layer. The plurality of filled vias each have a structure in which a via hole penetrating the first insulating layer is filled with a metal. The first conductor layer includes a pad. The pad overlaps the plurality of filled vias in a plan view from a thickness direction of the first insulating layer and is connected to the plurality of filled vias.

Abstract: A wiring substrate includes a first insulating layer, a first conductor layer, and a plurality of filled vias. The first insulating layer has a first surface and a second surface positioned on a side opposite to the first surface. The first conductor layer is formed on the first surface of the first insulating layer. The plurality of filled vias are formed inside the first insulating layer. The plurality of filled vias each have a structure in which a via hole penetrating the first insulating layer is filled with a metal. The first conductor layer includes a pad. The pad overlaps the plurality of filled vias in a plan view from a thickness direction of the first insulating layer and is connected to the plurality of filled vias.

Abstract: A resin composition for a refrigerant-transporting hose, including: a semi-aromatic polyamide resin (A) as a main component; an aliphatic polyamide resin (B); and an elastomer (C), in which the aliphatic polyamide resin (B) is dispersed in a phase formed of the semi-aromatic polyamide resin (A) and the elastomer (C), which is not crosslinked, is incorporated in the form of particles into the dispersed aliphatic polyamide resin (B). Thus, excellent refrigerant permeation resistance and acid resistance, and at the same time, for example, extrusion processability and flexibility, are obtained.

Abstract: Provided is a shaft made of a fiber-reinforced resin, in which a continuous glass fiber bundle is embedded in parallel with a lengthwise direction of the shaft, the shaft including a matrix resin formed of a resin composition comprising (A) a thermosetting resin as a main component, (B) carbon black, (C) a dispersant having a basic functional group, and (D) a curing agent for the component (A), in which the component (B) is particulate and is distributed along continuous glass fibers constituting the continuous glass fiber bundle. Thus, there can be provided a conductive shaft that is lightweight, has high strength, is excellent in conductivity, and is inexpensive, and a conductive roll for OA equipment using the shaft, and a method of producing the conductive shaft.

Abstract: A highly durable vibration-damping material is provided. The inventive vibration-damping material comprises a thermoplastic polyurethane elastomer as a major component, and carbon black, wherein the carbon black is dispersed essentially only in a soft segment of the thermoplastic polyurethane elastomer.

Abstract: A method for manufacturing a hose with a protector layer 2 on the outer periphery of a tubular polyamide resin layer 1 includes steps of: preparing a rubber composition for forming the protector layer by separately preparing a first rubber material containing components (A) to (C) and a second rubber material containing components (a) and (b) but substantially free of a sulfur vulcanization agent and mixing them in a mixer; and forming the protector layer 2 by continuously vulcanizing unvulcanized rubber after continuous extrusion of the rubber composition onto the outer periphery of the previously formed polyamide resin layer 1. (A) Ethylene-propylene rubber (B) Sulfur vulcanization agent (C) Thiuram vulcanization accelerator (mp. 66 to 105° C.) (a) Ethylene-propylene rubber (b) Vulcanization accelerator (mp. 120° C. or higher).

Abstract: A refrigerant-transporting hose includes a tubular inner layer 1 in contact with a fluorine refrigerant, an intermediate layer 2 formed on an outer periphery surface thereof, and at least one rubber layer 3 and 5 formed on a further outer periphery thereof, and the inner layer 1 is made of a inner layer material including maleic anhydride-modified polypropylene as a main component and the intermediate layer 2 is made of a intermediate layer material including polyamide resin as a main component.

Abstract: A refrigerant-transporting hose having excellent low-refrigerant permeability, acid resistance, and flexibility includes a tubular resin layer for contacting with a refrigerant, in which the resin layer is formed of a resin composition containing (A) an aliphatic polyamide; (B) a semi-aromatic polyamide; and (C) an elastomer, in which a weight mixing ratio “component (A)/component (B)” between the component (A) and the component (B) is 95/5 to 60/40, and the component (A) and the component (B) are in a compatible state.

Abstract: To provide a hose for transporting a refrigerant, a butyl rubber layer 7 is formed on outer periphery of a tubular resin layer 1, which is in contact with a refrigerant, and an ethylene-propylene rubber layer 8 is further formed on the outer periphery thereof. The resin layer 1 is composed of a material that contains, as a main component, a mixture of a polyamide resin and a modified polyolefin elastomer, a skin layer 6 is formed only on an inner peripheral surface of the resin layer, and tensile modulus (A) of the skin layer 6, tensile modulus (B) of the resin layer 1 excluding the skin layer 6, tensile modulus (C) of the butyl rubber layer 7, and tensile modulus (D) of the ethylene-propylene rubber layer 8 satisfy the relationship that is defined by the following formula (?): (A)>(B)>(C)>(D)??(?).