Minato-ku, Japan
Minato-ku, Japan

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Patent
Nichias Corporation | Date: 2017-05-03

A sound proof material here disclosed comprises an exterior material layer 8 including a holding material 3 made of a woven fabric and a skin material 2 made of a thermoplastic resin film, and a sound absorbing material layer 9, the exterior material layer 8 being laminated on the sound absorbing material layer 9 so that the skin material 2 is located on the surface side of the sound proof material, whereby the sound proof material can endure long-time use without deterioration in moldability under inhibition of aging in severe operating environments so that the sound proof material can be suitably used while suppressing sound from a sound source around an engine installed in an engine compartment of an automobile.


A holding material (3) includes a stack of a first mat (3A) and a second mat (3B), the first mat (3A) including alumina fibers that include 60 wt% or more of alumina and 40 wt% or less of silica, and the second mat (3B) including silica fibers that include 60 wt% or more of silica and 40 wt% or less of alumina and having a surface pressure higher than that of the first mat as measured at a gap bulk density of 0.30 g/cm^(3).


Patent
Nichias Corporation | Date: 2017-05-03

A coating agent includes a polyurethane and a hydrocarbon-based synthetic wax.


Patent
Nichias Corporation | Date: 2017-05-17

Inorganic fibers including the following composition, SiO_(2), Al_(2)O_(3), MgO and CaO being main components, and the inorganic fibers being produced by a melting method: SiO_(2): 3.0 wt% or more and less than 48.0 wt%, Al_(2)O_(3): more than 20.0 wt% and 80.0 wt% or less, MgO: 1.0 wt% or more and 50.0 wt% or less, CaO: 1.0 wt% or more and 50.0 wt% or less, and Fe_(2)O_(3): 0.0 wt% or more and less than 1.0 wt%.


Patent
Nichias Corporation | Date: 2017-06-14

Inorganic fibers including the following composition, SiO_(2), MgO and CaO being main components: SiO_(2): 73.6 wt% to 85.9 wt%, MgO: 9.0 wt% to 21.3 wt%, CaO: 5.1 wt% to 12.4 wt%, Al_(2)O_(3): 0 wt% or more and less than 2.3 wt%, and Fe_(2)O_(3): 0 wt% to 0.50 wt%.


A vibration-isolation structure for suppressing vibration transmitted from a vibration body (200) to a shield (100), that is provided with a vibration body contact part (2) that contacts the vibration body (200) and has an insertion hole (21) through which a fastener (300) for fastening the shield (100) to the vibration body (200) is inserted, a peripheral part (4) that is located on the periphery of the vibration-isolation structure, a slit S that is arranged between the vibration body contact part (2) and the peripheral part (4) and is formed such that it surrounds the vibration body contact part (2) in one or two or more rows, and a bridge part (3) that bridges the vibration body contact part (2) and the peripheral part (4).


Patent
Nichias Corporation | Date: 2016-02-10

Provided is a shield in which a flexible member is interposed between two metal plates; still unfilled spaces that are not filled with the flexible member are secured, so that the shielding properties are improved by air layers. The shield 1A includes two metal plates 2, 3 disposed to face each other, and a plate-shaped flexible member 4 interposed between the two metal plates. Each of the two metal plates 2, 3 has a plurality of protrusion-depression structures. Gap-forming means is provided to form gaps of a width greater than the thickness of the flexible member 4 between the two metal plates 2, 3 when the flexible member 4 is interposed therebetween. Unfilled spaces (5) that are not filled with the flexible member 4 are provided between the two metal plates 2, 3.


Patent
Nichias Corporation | Date: 2016-06-15

A crosslinking agent includes a compound represented by the following formula (1). In the formula (1), R^(1), R^(2), and R^(3) are independently a fluorine atom, an alkyl group, a fluoroalkyl group, or a substituted or unsubstituted aryl group, a plurality of R^(1) are identical or different, a plurality of R^(2) are identical or different, a plurality of R^(3) are identical or different, provided that at least one of R^(1), R^(2), and R^(3) is a fluorine atom or a fluorine atom-containing group, m is an integer of from 2 to 6, l is an integer of from 0 to 2, and each hydrogen on the benzene ring(s) is optionally substituted with a substituent.


Patent
Nichias Corporation | Date: 2016-02-17

A method for producing a cross-linked fluoroelastomer including cross-linking a fluoroelastomer with a cross-linking agent in an inert gas atmosphere in the presence of an initiator.


Patent
Nichias Corporation | Date: 2016-06-08

A sheet including exfoliated clay minerals, having a density of 1.6 g/cm^(3) or less and a compression ratio of 20% or more.

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