68results about How to "Low absorption" patented technology

A polyamide composition comprising 50 to 90 parts by weight of (A) semiaromatic polyamides having dicarboxylic acid units containing 60 to 100 mole % of terephthalic acid units and diamine units containing 60 to 100 mole %, in total, of 1,9-nonanediamine units and/or 2-methyl-1,8-octanediamine units, and 50 to 10 parts by weight of (B) aliphatic polyamides in which the average of total carbon atoms of dicarboxylic acid units and diamine units per one amide group is 7 to 12; having excellent moldability, toughness, light-weightness, hot water and steam resistance, heat resistance, mechanical characteristics, low water absorption, chemical resistance and melt stability; and are applicable for molding at low temperature with a conventional steam-heating or a conventional hot-water-heating type mold to give molded articles having sufficient heat resistance, rigidity at high temperature and dimensional stability.

A photosensitive composition having low absorption loss at 1,300-1,610 nm and is suitable for practical waveguide devices. The composition comprises at least one (meth)acrylate prepared from a fluorinated monomer or polymer having minimum two hydroxyl groups, at least one multifunctional non-fluorinated (meth)acrylate and at least one photoinitiator. An optical coating on a variety of substrates is obtained by exposing the photosensitive composition to actinic radiation such as UV light. An optical waveguide device is fabricated by patterning the photosensitive composition on a substrate.

There is provided a polyamide resin that can achieve a sufficiently high molecular weight compared to conventional polyamide 92, has a broad moldable temperature range or width estimated from a difference between melting point and thermal decomposition temperature, exhibits excellent melt moldability and has excellent chemical resistance and hydrolysis resistance compared to conventional aliphatic polyamide resins without impairing low water absorption property of an aliphatic linear polyoxamide resin. A polyamide resin in which the dicarboxylic acid component is oxalic acid and the diamine component is a diamine component composed of 1,9-nonanediamine and 2-methyl-1,8-octanediamine, with the molar ratio between 1,9-nonanediamine and 2-methyl-1,8-octanediamine being from 6:94 to 99:1.

A device for contact-based capture of human autopodial prints using disturbed total internal reflection, comprising a protective body with a contact surface, a sensor layer comprising light-sensor elements in an array for detecting light of a predefined wavelength range, and a light guide. Passband areas transparent for light of the predefined range are between the sensor elements. The light guide is transparent to light in the range and includes parallel lower and upper faces. The faces define a coupling-in surface for light emitted from a light source in a limited angular range around a preferred direction. Due to the directed angle of incidence, light entering the light guide is totally internally reflected at the faces. A mirror layer between the sensors and the guide reflects some light back into the light guide and transmits other light. Light exiting the guide is homogenized dependent upon a distance to the light source.

A liquid ejection apparatus including: a flushing-operation-data producing section which produces flushing-operation data for flashing of ink; a second-liquid-ejection-data producing section which produces data about ejection of treatment liquid such that (i) the treatment liquid is to be landed on a dot area on which the ink is to be landed upon forming an image dot among dot areas and (ii) an amount of the treatment liquid landed to be on at least one dot area on which the ink is to be landed upon flashing of the ink is made smaller, by referring the flushing-operation data produced by the flushing-operation-data producing section, than an amount of the treatment liquid to be landed on a dot area on which the ink is not to be landed upon flashing; and a second-liquid controlling section which controls a head on the basis of the data produced by the second-liquid-ejection-data producing section.

Traditionally, sol-gel silicates have been reported as being high temperature processable at 400 C to give reasonably dense films that showed good leakage current densities (<5×10⁻⁸ A/cm²). Recently we have discovered that we are able to prepare films from particular combinations of sol-gel silicate precursors that cure at 135° C. to 250° C. and give good leakage current density values (9×10⁻⁹ A/cm² to 1×10⁻¹⁰ A/cm²) as well, despite the decrease in processing temperatures. These are some of the first examples of silicates being cured at lower temperatures where the leakage current density is sufficient low to be used as low temperature processed or solution processable or printable gate dielectrics for flexible or lightweight thin film transistors. These formulations may also be used in the planarization of stainless steel foils for thin film transistors and other electronic devices.

The invention relates to a preparing method of heat preservation paint with waterproof and antifouling performance. The heat preservation paint comprises aggregate, a base material, auxiliary filler and an auxiliary and is characterized in that hollow glass microspheres serve as the aggregate, the base material is silicone-acrylic emulsion, and the heat preservation paint composition comprises, by weight, 16-18 parts of hollow glass microspheres and 21-27 parts of silicone-acrylic emulsion. As the silicone-acrylic emulsion is selected, while having excellent heat preservation performance, the heat preservation paint has good waterproof and antifouling performance, and particularly fluorine-containing silicone-acrylic emulsion is selected, so that the waterproof and antifouling performance of the heat preservation paint is more excellent.

In the method of generating high power light with high efficiency and low thermal loading, the improvement comprising the steps of resonantly pumping a first thulium-doped fiber laser with a second thulium-doped fiber last, said second thulium-doped fiber laser having a shorter wavelength than said first thulium-doped fiber laser.

The present invention relates to a method of increasing the bioavailability of angiotensin II receptor blockers (ARBs) by preparing a combination of the ARB and at least one solubility enhancer. The present invention particularly relates to solubility enhancers that not only function as solubility enhancers but also improve the dissolution rate in particular in acidic or weakly acidic media where the dissolution of ARBs is minimal. In the composition, the ARB can be present as a physical mixture, solid dispersion, solid solution or complex with the solubility enhancer. Combinations of ARBs and solubility enhancers can be incorporated into immediate or controlled release or other suitable modified release formulations. Immediate release formulations comprising ARB compositions have an in vitro release of at least 40% in acidic media (pH<3). Thus, the bioavailability of the ARB can be increased by at least 20%, as measured by Cmax, AUC0-t and AUC0-∞.

Disclosed are methods for hydrogen loading silica glass and silica glass comprising loaded H₂. The methods can lead to H₂ gradient in the glass material. Alternatively, the method may involve the use of varying H₂ partial pressure of H₂ in the atmosphere. Both can result in expedited hydrogen loading process.

During operation of an electro-absorption modulator, an optical signal is conveyed, using an optical waveguide in the electro-absorption modulator, to a semiconductor layer that substantially fills a gap between two portions of the optical waveguide. Then, the optical signal is electro-absorption modulated by selectively applying a voltage to electrodes that produces an electric field, approximately perpendicular to the midline of the optical waveguide, in the semiconductor layer. These electrodes are coupled to the edges of the semiconductor layer at the periphery along the width of the semiconductor layer by intervening layers. Furthermore, the intervening layers include a material that has a lower index of refraction than the semiconductor layer, and a lower optical absorption than the electrodes.

The invention relates to an optical waveguide for guiding light in a predefined wavelength range, the optical waveguide comprising core and cladding regions for confining light, the core and/or cladding region or regions being formed on a substrate and comprising material of the stoichiometric composition Si_aO_xN_yX_zH. The invention further relates to a method of manufacturing an optical waveguide, an optical waveguide obtainable by the method and an optical device comprising such a waveguide. The object of the present invention is to provide an optical waveguide with low optical loss due to a reduced hydrogen bond-originated absorption. The problem is solved in that X is selected from the group of elements B, Al, P, S, As, Sb and combinations thereof, and the ratio y/z is larger than 1. This has the advantage that a low optical absorption in the waveguide may be achieved, possibly over a broad wavelength range. Further, a relatively low annealing temperature may be used yielding a relatively low induced strain whereby a low birefringence may be achieved. The optical waveguide may e.g. be manufactured by PECVD, which is ideal for the further processing of low loss waveguides. Waveguides according to the invention show superior transmission characterized with losses below 0.05 dB/cm between 900 nm and 1600 nm. In particular the absorption due to the second overtone of the Si:N—H vibration may be lowered to a value below the detection level. The invention may e.g. be used for the optical communications systems, in particular for branching components (e.g. splitters) and components for wavelength division multiplexing (WDM) systems, e.g. telecommunication systems, fibre-to-the-home, etc.

A process for the production of a low-hardness thermosetting polyurethane elastomer having a high curing rate, a low JIS A hardness of 10 to 40, a small compression set, a low moisture absorption, good dimensional stability and no bleeding property. In this process, a prepolymer formed from a difunctional polyol having a degree of total unsaturation of at most 0.01 meq/g and 4,4′-diphenylmethane diisocyanate alone or a polymethylene polyphenyl polyisocyanate containing 4,4′-diphenylmethane diisocyanate having an NCO content of 3 to 6% is reacted with a difunctional or trifunctional polyol having a degree of total unsaturation of at most 0.01 meq/g or a mixture thereof in the presence of a urethane reaction promoting catalyst.

The invention relates to a glass fiber loading cuprous oxide visible light catalyst and an application thereof, belonging to the photocatalysis technology. The cuprous oxide load rate is 2.0 to 5.5 percent. The glass fiber load cuiprous oxide visible light catalyst is prepared by the following steps of: adding 40 to 42 parts by weight of reagent which is capable of reducing Cu<2+> to Cu+ into 20 parts of aquatic solution with the Cu2+ concentration of 0.5 to 2.0 mol/L which is identical to the concentration of the reagent to obtain a transparent solution; preserving heat of 190 to 210 parts by weight of NaOH solution with the concentration of 0.5 to 2.0 mol/L at the temperature of 48 to 68 DEG C; and putting the glass fibers with the diameter of 20 to 30 microns into the transparent solution for 28 to 32s and then putting into the NaOH solution for 28 to 32s, finally rinsing the glass fibers in the distilled water for 9 to 11s to complete one circle; after 18 to 40 circles, dehydrating the glass fibers and drying at the temperature of 60 to 68 DEG C to obtain a product. The glass fiber loading cuprous oxide visible light catalyst is used for degrading pollutants in air or water. The photocatalysis activity is high, copper dioxide is uniformly and firmly loaded on the surface of the glass fibers, and a high practical value can be realized.

The invention discloses a synergist for improving crop resistance and fertilizer absorption capacity. The synergist includes the following components by weight: 20-30 parts of an oyster shell powder, 20-30 parts of a water chestnut skin powder, 10-20 parts of a chinaberry bark powder, 10-20 parts of a magnetic material, 10-20 parts of an illite powder, 5-10 parts of a shiitake mushroom polysaccharide extract. The synergist can, on one hand, improve the resistance of crops, especially reducing the pests and diseases significantly, improving waterlogging and drought resistance; and, on the other hand, greatly reduce the use of fertilizers, especially nitrogen fertilizers, preventing soil compaction. It can also significantly increase the content of active polysaccharides, especially β-glucan in crops. In addition, the raw materials are readily available, the cost is low, and there are significant economic benefits.

A heat-resistant polyether having a heat resistance to a temperature of 300° C. or higher, sufficient solubility in organic solvents, low water absorption and high adhesion to substrates is provided by a heat-resistant polyether including a repeating unit represented by the formula (1) and having a polystyrene-converted weight-average molecular weight determined by GPC of not less than 1000 and not more than 50000:

wherein Ar represents a bivalent organic group having an aromatic ring; R¹ to R⁸ each independently represent a hydrogen atom or an aryl group which may be substituted; and when at least one of R¹ to R⁸ is an aryl group which may be substituted, X represents a direct bond or a hydrocarbon group having 1 to 20 carbon atoms, while when all of R¹ to R⁸ are hydrogen atoms, X is represented by the formula (2):

—CR⁹(R¹⁰)—  (2)

wherein R⁹ and R¹⁰ each independently represent an aryl group which may be substituted.

A separate confinement heterostructure includes a quantum-well layer bounded by an n-side waveguide layer and a p-side waveguide layer. The waveguide layers guide a lasing mode of the heterostructure. The n-side waveguide layer is composed of indium gallium phosphide (InGaP) and the p-side layer is composed of aluminum gallium arsenide (AlGaAs). The heterostructure is configured such that more than 80% of the optical mode propagates in the n-side waveguide layer.