Abstract: The present invention relates to an annular laminate including a substrate and a rubber coating film laminated in contact with the substrate, wherein the rubber coating film includes a crosslinked product of a composition including a crosslinkable perfluoroelastomer (FFKM), a crosslinking agent including at least one of compounds represented by general formulas (1) to (3), and a solvent, and a thickness of the rubber coating film is 1 ?m or more and 500 ?m or less. According to the present invention, provided are an annular laminate that has good hermetic closure even with a low crushing pressure and can be used as a seal material exhibiting high radical resistance at a high temperature, and a method for manufacturing the same.

Abstract: Provided is a rubber composition for sealing material which contains 100 parts by mass of a rubber component, 50 to 140 parts by mass of silica, 1 to 20 parts by mass of a silane coupling agent, and 15 to 35 parts by mass of carbon black. The rubber component is preferably an ethylene-propylene-diene rubber.

Abstract: Provided are an elastomer composition including a first fluoroelastomer that is a copolymer of tetrafluoroethylene and perfluoro (alkoxyvinyl ether) and a second fluoroelastomer different from the first fluoroelastomer, and a sealing material including a crosslinked product of the elastomer composition.

Abstract: A determination system includes an imaging unit that captures an image of a gasket already used for flange fastening and an analyzing unit that analyzes, based on the image captured, a contact mark formed on the gasket as a result of contact between the gasket and a pair of flanges when the flanges are fastened through the gasket. The analyzing unit includes a detection unit that detects, in the captured image, a contact mark region indicative of the contact mark and enclosed with a first line and a second line, a distance calculation unit that calculates a distance between the first line and the second line, and a state determination unit that determines, based on at least the distance, whether the flanges are properly fastened through the gasket.

Abstract: To provide a method of manufacturing a low heat-resistant sensor that has high chemical resistance, excellent drip-proof properties, and excellent dust-proof properties.

Abstract: The present invention addresses a problem of providing a composite seal material that has performances, such as a vacuum sealing performance, plasma resistance, and corrosive gas resistance, in combination, that does not require a strong pressing force during use, that does not have a possibility of generating particles, and that is capable of maintaining the vacuum sealing performance for a long period of time. Characteristics of a solution to the problem is a composite seal material having an annular shape and including a first member and a second member adjacent to each other on left and right. The first member includes a seal body portion, and a lip portion extending from the seal body portion upwardly in the thickness direction of the composite seal material. The lip portion of the first member extends in an inclined orientation outwardly on a side opposite to the second member adjacent thereto.

Abstract: An embodiment of the present invention relates to a bonded object or a method for manufacturing a bonded object, the bonded object having bases bonded therein while placing an adhesive layer in between, the adhesive layer being obtained from a fluororubber composition that contains at least one fluororubber selected from fluoroelastomer (FKM) and perfluoroelastomer (FFKM), and has a Mooney viscosity (ML 1+10) at 121° C., measured in accordance with ASTM D1646, of 80 to 115.

Abstract: A metal gasket having an annular planar shape with a vertical cross-section having a sideways U-shape has angular portions in an upper surface portion and a lower surface portion, respectively. In the angular portions, inclined faces inclined toward the inner peripheral direction and having a minimum thickness portion with a thickness corresponding to 3-25% of the height of the metal gasket are formed at a boundary between an upper surface of the upper member and an inner peripheral surface of an inner peripheral portion and a boundary between a lower surface of the lower surface portion and the inner peripheral surface of the inner peripheral portion, respectively. A height from the upper surface of the upper surface portion to a vertex of the angular portion and a height from the lower surface of the lower surface portion to a vertex of the angular portion are 0.01 mm or greater.

Abstract: A low heat-resistant sensor that has high chemical resistance, excellent drip-proof properties, and excellent dust-proof properties is provided. The low heat-resistant sensor includes a sensor body that includes a sensor unit that is disposed in a housing and a cable that is electrically connected to the sensor unit of the sensor body. The housing of the sensor body is composed of fluorine resin, the cable is covered by a tube composed of fluorine resin, a portion at which the housing and the tube are connected to each other is thermally bonded, and the housing and the tube are integrally formed.

Abstract: A substrate with a conductive layer including a substrate, which is a woven or nonwoven fabric containing polytetrafluoroethylene (PTFE) nanofibers; and a conductive layer formed on the substrate, the conductive layer being formed from a conductive composition with a viscosity in a range of 1 to 500 Pa·s measured at 25° C. with a rotational viscometer at a rotational speed of 50 rpm, wherein the following requirement (1) is satisfied: requirement (1); the substrate with a conductive layer has a Gurley permeability of 10 s/100 ml or less.

Abstract: Provided is a metal gasket, which is used for connecting pipes to each other in a thermal power plant, a nuclear power plant, a steam engine in a steam turbine ship, an oil refinery line, a petrochemical industry process line, a semiconductor manufacturing line or the like, and which is characterized in that a V-shaped circumferential groove 2 is provided on the outer circumferential surface of the metal gasket 1, the ratio (circumferential groove depth A/horizontal length B) of the depth A of the circumferential groove 2 and the horizontal length B in a cross section of the metal gasket 1 is 0.1 to 0.95, and the notch angle of the V-shaped circumferential groove 2 is 30° to 120°.

Abstract: A PTFE sheet in which PTFE fibers having a diameter of 1 ?m or less are spun, the PTFE sheet having a Gurley value in the range of 1 s/100 cc/in2 to 3 s/100 cc/in2 and a shrinkage factor in a direction orthogonal to a sheet winding direction of no more than 10% when heated to 300° C. The PTFE sheet makes a die adsorbable via a tool, which is for heating the die when the die is mounted on a mounting body, by being sandwiched between the die and the tool, and suppresses the adhesion, to an adsorption surface of the tool or to the die, of an adhesion member for fixing the die to the mounted body. Through this configuration, a PTFE sheet capable of stabilizing vacuum adsorption and improving maintainability and a method for mounting a die are provided.

Abstract: A sealing member includes a thermoplastic fluororesin composition including a thermoplastic fluororesin (A) having a Shore D hardness of less than or equal to 50, the Shore D hardness being measured at 23° C. in accordance with ASTM D2240, and a cross-linked structure forming agent (B) that is selected from the group consisting of a polyfunctional unsaturated compound (b-1), a polyamine compound (b-2), and a polyhydroxy compound (b-3) and that is capable of forming a cross-linked structure through a reaction with the thermoplastic fluororesin (A), the thermoplastic fluororesin composition not substantially containing a peroxide compound when containing the (b-1), not substantially containing an acid acceptor when containing the (b-2), and not substantially containing at least one of the acid acceptor and an onium compound when containing the (b-3); and a method for producing a cross-linked body including a step of cross-linking the thermoplastic fluororesin composition by an ionizing radiation.

Abstract: Provided is a rubber composition for sealing material which contains 100 parts by mass of a rubber component, 50 to 140 parts by mass of silica, 1 to 20 parts by mass of a silane coupling agent, and 15 to 35 parts by mass of carbon black. The rubber component is preferably an ethylene-propylene-diene rubber.

Abstract: Provided are a perfluoroelastomer composition which contains 100 parts by weight of a perfluoroelastomer containing a constituent unit derived from a nitrile group-containing monomer, and 0.01 to 5 parts by weight of ketjen black; and a sealing material including a crosslinked product of the perfluoroelastomer composition.