摘要:
The pressure vessel of the present invention comprises an inner shell capable of serving as a gas barrier and a pressure resistant outer shell provided to cover the inner shell, said outer shell being made of an FRP comprising reinforcing fibers and a resin and is 35 GPa or more in tensile modulus and 1.5% or more in tensile breaking strain. The present invention can provide a pressure vessel not only light in weight, but also excellent in retaining its internal pressure against repetitive impacts and also excellent in reliability. The process for producing a pressure vessel of the present invention comprises the step of forming a pressure resistant outer shell made of an FRP comprising reinforcing fibers and a resin and is 35 GPa or more in tensile modulus and 1.5% or more in tensile breaking strain, around an inner shell capable of serving as a gas barrier, by a filament winding method or a tape winding method. The present invention can produce a pressure vessel excellent in retaining its internal pressure, excellent in reliability, and light in weight at a low cost.
摘要:
The pressure vessel of the present invention comprises an inner shell capable of serving as a gas barrier and a pressure resistant outer shell provided to cover the inner shell, said outer shell being made of an FRP comprising reinforcing fibers and a resin and is 35 GPa or more in tensile modulus and 1.5% or more in tensile breaking strain. The present invention can provide a pressure vessel not only light in weight,.but also excellent in retaining its internal pressure against repetitive impacts and also excellent in reliability.The process for producing a pressure vessel of the present invention comprises the step of forming a pressure resistant outer shell made of an FRP comprising reinforcing fibers and a resin and is 35 GPa or more in tensile modulus and 1.5% or more in tensile breaking strain, around an inner shell capable of serving as a gas barrier, by a filament winding method or a tape winding method. The present invention can produce a pressure vessel excellent in retaining its internal pressure, excellent in reliability, and light in weight at a low cost.
摘要:
Light metal/CFRP-made structural members which are characterized in that they are structural materials in which a CFRP material is stuck to the surface of a light metal material via an adhesive agent layer of thickness at least 10 &mgr;m and up to 500 &mgr;m, and the volume resistivity of the adhesive agent layer between said metal material and said CFRP material is at least 1×1013 &OHgr;.cm and, furthermore, the adhesive strength at room temperature is at least 15 MPa. In accordance with the present invention, since conventional light metal/CFRP structural materials can be made lighter and, furthermore, since the resistance to galvanic corrosion is outstanding and it is possible to markedly enhance the strength and the impact energy absorption performance, the development of applications and large-scale expansion into new fields becomes possible. Weight reduction and enhancing the durability and reliability of structures also makes a considerable contribution in terms of environmental protection.
摘要:
A loudspeaker system capable of simultaneously providing listeners with a listening environment not giving them a feeling of strangeness. The loudspeaker system (100) comprises drive motors (111 to 113, 121 to 123) for so driving at least first R-channel loudspeaker (101) that the current first listening position is substantially included in the perpendicularly bisecting plane of a line joining the intersecting point of the first R-channel speaker (101) and its directivity axis and the intersecting point of the second R-channel loudspeaker (120) and its directivity axis and so driving at least fourth L-channel loudspeaker (104) that the current second listening point is substantially included in the perpendicularly bisecting plane of the line joining the intersecting point of a third L-channel loudspeaker (103) and its directivity axis and the intersecting point of a fourth L-channel loudspeaker (104) and its directivity axis. The loudspeaker system (100) further comprises their motor driver section (130).
摘要:
Disclosed herein is an interferometric surface inspection machine which is arranged to facilitate the inspection of finished spherical lens surfaces, and which essentially includes: a surface plate formed with a through light guide opening in a predetermined position; an up-down guide means suspended from the lower side of the surface plate; an interferometer liftably supported on the up-down guide means and having a reference lens with a reference surface thereof disposed on the side of the light guide opening and in face to face relation with said light guide opening; and a lens mount portion adjustably located in a predetermined position above the light guide opening in the surface plate and adapted to support peripheral edge portions of a spherical lens element on the side of the lens surface to be inspected.
摘要:
A loudspeaker system capable of simultaneously providing listeners with a listening environment not giving them a feeling of strangeness. The loudspeaker system (100) comprises drive motors (111 to 113, 121 to 123) for so driving at least first R-channel loudspeaker (101) that the current first listening position is substantially included in the perpendicularly bisecting plane of a line joining the intersecting point of the first R-channel speaker (101) and its directivity axis and the intersecting point of the second R-channel loudspeaker (120) and its directivity axis and so driving at least fourth L-channel loudspeaker (104) that the current second listening point is substantially included in the perpendicularly bisecting plane of the line joining the intersecting point of a third L-channel loudspeaker (103) and its directivity axis and the intersecting point of a fourth L-channel loudspeaker (104) and its directivity axis. The loudspeaker system (100) further comprises their motor driver section (130).
摘要:
The present invention relates to a carbon fiber reinforced plastic member provided with high-elongation fiber bundle regions, which are uni-directionally aligned and separately disposed within the plastic member. The plastic member provides a carbon fiber reinforced plastic of lightweight, high strength and high modulus that is safe. Even if it breaks, it shows little scatter of fragments or exposure of dangerous fracture surfaces. Preferably, the high-elongation fiber at break has an elongation exceeding about 10%.
摘要:
A resinous composition for friction materials, especially for non-asbestos type friction materials is disclosed. The composition is composed of a phenolic resin modified by the reaction product of an acrylonitrile-butadiene liquid rubber with an epoxy resin, and further modification with a triazine resin. This composition when blended with non-asbestos fibers, such as fiberglass, etc., retains the flexibility desired, provides excellent friction characteristics and a reduced wear rate.
摘要:
The polypeptide of the present invention has an activity of binding specifically to the cis-element of Chondromodulin-I (ChM-I) gene promoter and promoting the transcription of the ChM-I gene. The polypeptide of the present invention is usable in screening for a compound that promotes or inhibits the activity of the polypeptide.