Koike T.,Arisawa Manufacturing Co.
Polymer Engineering and Science | Year: 2012
This article reviews the progress in the development of wood biomass origin epoxy resin system from 1960s to recent years in Japan. The methods of using wood biomass for epoxy resin systems are classified into the following three categories; one is the method of preparing lignin-epoxy resins after applying treatments on the industrial lignin, which has been disposed in large volume, another is that of using wood as the raw material of epoxy resin system after applying treatments directly on wood, and the other is that of composing epoxy resin and/or curing agent from woody raw materials (except the industrial lignin), which are isolated and refined from wood before the treatments. Although several promising technologies have been developed and tried to be industrialized in Japan, the full-fledged development of wood biomass-based epoxy resin has just started when viewed as a whole. These developments will be further accelerated toward the construction of the environment harmony type and the resources circulation type societies. As the result of continuous developmental efforts, it is expected that we can look at the scene where epoxy resins are sustainably supplied in various forms even after the depletion of oil resources. © 2012 Society of Plastics Engineers.
ARISAWA Manufacturing CO. | Date: 2016-09-05
Conventional optical elements cannot emit circularly polarized light beams obtained by beam separation in the same direction. An optical element includes a polarization splitter element configured to split incoming light into a first circularly polarized light beam and a second circularly polarized light beam that has different handedness than the first circularly polarized light beam, where the polarization splitter element is configured to reflect the first circularly polarized light beam and allow the second circularly polarized light beam to transmit, and a reflector element configured to reflect the first circularly polarized light beam that has been reflected by the polarization splitter element, to proceed in a direction in which the second circularly polarized light beam is allowed to transmit.
ARISAWA Manufacturing CO. | Date: 2014-09-22
A retardation plate manufacturing method for manufacturing a retardation plate that has an orientation pattern in which is formed a plurality of regions having optical axes oriented in different directions from each other, the retardation plate manufacturing method comprising arranging an unoriented light orientation layer that is to be oriented by light on a first surface of a substrate; preparing a retardation mask including an orientation pattern in which is formed a plurality of regions that have a quarter wavelength retardation plate retardation function and correspond to the plurality of regions in the orientation pattern of the retardation plate; and orienting the light orientation layer by irradiating the retardation mask with elliptically polarized light and irradiating the light orientation layer with polarized light emitted form the retardation mask.
Edwards Japan Ltd and ARISAWA Manufacturing CO. | Date: 2014-10-08
Provided is a vacuum pump in which the flexing of a rotating cylinder made of a fiber-reinforced resin can be reduced as much as possible to sufficiently reduce the gap between the rotating cylinder and a fixed cylinder, and exhaust performance can thereby be improved to great effect. A vacuum pump comprising a thread groove pump portion equipped with a fixed cylinder portion (2) having a spiraling thread groove portion (1) provided in an internal peripheral surface, and a rotating cylinder portion (3) placed inside the fixed cylinder portion (2), the thread groove pump portion exhausting through a spiraling exhaust flow channel due to the rotating cylinder portion (3) being caused to rotate, and the exhaust flow channel being formed from the thread groove portion (1) and an external peripheral surface of the rotating cylinder portion (3). The rotating cylinder portion (3) is configured by stacking a plurality of fiber-reinforced resin layers, and the outermost fiber-reinforced resin layer is thicker than the adjacent layer.
ARISAWA Manufacturing CO. | Date: 2014-06-12
Since a screen contains a diffusion agent, the diffusion agent changes polarization characteristics of picture light and degrades the stereoscopic image. Provided is a screen comprising a substrate shaped as a flat board; a reflective layer made of metal arranged on one surface of the substrate; and an exposure layer that is arranged on a surface of the reflective layer facing away from the substrate, is optically isotropic and transparent with respect to visible light, and has bumps and depressions formed in an exposed surface thereof. Also provided is a screen manufacturing method comprising providing a reflective layer on a substrate shaped as a flat board; and forming an exposure layer on a surface of the reflective layer facing away from the substrate, the exposure layer being optically isotropic and transparent with respect to visible light and having bumps and depressions formed in an exposed surface thereof.
ARISAWA Manufacturing CO. | Date: 2014-03-26
It is difficult to handle a right eye region and a left eye region that are formed separately. Therefore, provided is an eyeglass component comprising a polarization plate that has one absorption axis and a right eye region and left eye region arranged such that, when the eyeglass component is worn by a user, the right eye region is positioned in front of a right eye of the user and the left eye region is positioned in front of a left eye of the user; and a polarized light modulating layer that is layered on the polarization plate, has a first optical axis that modulates polarized light in the right eye region, includes a second optical axis that is in a different direction than the first optical axis and modulates polarized light in the left eye region, and has the right eye region and the left eye region formed integrally.
Fire-Retardant Resin Composition, Metal-Clad Base Laminate For Flexible Printed Circuit Board Utilizing Said Composition, Cover Lay, Adhesive Sheet For Flexible Printed Circuit Board And Flexible Printed Circuit Board
ARISAWA Manufacturing CO. | Date: 2014-04-09
(PROBLEM) To provide a flame-retardant resin composition that has superior adhesion subsequent to curing and molding when used as a printed wiring board adhesive and that provides superior printed wiring board electrical characteristics; and a flexible printed wiring board metal-clad laminate, a coverlay, a flexible printed wiring board adhesive sheet, and a flexible printed wiring board employing this resin composition. (SOLUTION) The flame-retardant resin composition comprises a thermosetting resin, a hardener, and a phosphorus-containing polymer.
ARISAWA Manufacturing CO. | Date: 2016-06-09
A resin composition for a flexible printed circuit board that can attain high adhesiveness and solder reflow resistance even if a base film having low dielectric properties is used, and that attains excellent electrical properties. The resin comprises a fluororesin and an isocyanate compound, wherein the fluororesin has a content of 1 to 50% by mass, and a hydroxyl equivalent of 300 to 5500 g/equivalent.
ARISAWA Manufacturing CO. | Date: 2015-04-22
Provided is an exposure apparatus including a transporting section; a first polarized light output section that outputs first polarized light; a second polarized light output section that outputs second polarized light; a first mask section that has formed therein a first aperture section that passes the first polarized light for exposing an orientation film and blocks the first polarized light; and a second mask section that has formed therein a second aperture section that passes the second polarized light for exposing the orientation film and blocks the second polarized light. The first aperture section and the second aperture section are formed to expose a certain region of the orientation film in an overlapping manner.
ARISAWA Manufacturing CO. | Date: 2014-10-08
Provided is a pressure vessel able to sustain a circular shape without deforming to ellipsoidal shape due to machining of side port apertures therein, and maintain pressures as high as 800-1,200 PSI. The pressure vessel is intended for use in seawater desalination by reverse osmosis, and comprises a pipe body (1) formed by filament winding (FW), and is furnished with an occluding cover (2) at each end of the pipe body (1), the peripheral surface of the pipe body being furnished, inward from the occluding covers (2), with inflow/outflow parts (3) through which the fluid flows in or out. The pipe body (1) is constituted by a helical layer (4), hoop layers, and a seal layer (6) furnished as the innermost layer. The helical layer (4) is furnished with a divergent part (7) diverging away from the seal layer (6) and extending from a location outward from the occluding cover (2) to a location inward from the inflow/outflow part (3). The hoop layers are constituted by a first hoop layer (8) furnished between the divergent part (7) and the seal layer (6), and a second hoop layer (9) furnished at the outer circumference of the helical layer (4), and extending from a location outward from the occluding cover (2) to a location inward from the inflow/outflow part (3).