3909 results about "Ultraviolet irradiation" patented technology

An apparatus and method for ultraviolet irradiation of air for the purpose of removing contaminants from that air is disclosed. A U-shaped ultraviolet bulb enshrouded within a quartz tube provides enhanced contaminant destruction characteristics. By combining a plurality of those bulbs in a chamber that is of polished aluminum, and further combining aluminum filters therewith, added irradiation enhancement is achieved. Further provided are baffles or baffling proximate the ultraviolet bulbs that cause the air to go turbulent thus drawing the air closer to the ultraviolet bulb and further enhancing the contaminant destruction characteristics. Moreover disclosed is treatment of substrates with a chemical agent that facilitates the arrest of contaminants from the air onto the substrate for further irradiation of the contaminants from the bulbs. This further irradiation breaks down the arrested contaminants thus providing the substrate with a self-cleansing effect.

A method of depositing a platinum based metal film by CVD deposition includes bubbling a non-reactive gas through an organic platinum based metal precursor to facilitate transport of precursor vapor to the chamber. The platinum based film is deposited onto a non-silicon bearing substrate in a CVD deposition chamber in the presence of ultraviolet light at a predetermined temperature and under a predetermined pressure. The film is then annealed in an oxygen atmosphere at a sufficiently low temperature to avoid oxidation of substrate. The resulting film is free of silicide and consistently smooth and has good step coverage.

The invention provides a water purification system and method for combining ultraviolet germicidal irradiation and photocatalysis in a helical reactor geometry that maximizes both the photocatalytic efficiency and the germicidal dosage of the ultraviolet irradiation in deactivation of microbes and the destruction of contaminant organic compounds.

An ultraviolet sensor capable of separately detecting amount of ultraviolet irradiation of two wavelength range of a UV-A wave and a UV-B wave is provided. The ultraviolet sensor includes: a pair of photodiodes in which a high concentration P-type diffusion layer formed by diffusing a P-type impurity with a high concentration and a high concentration N-type diffusion layer formed by diffusing an N-type impurity with a high concentration, which are formed in a first silicon semiconductor layer on an insulation layer, are opposed to each other with a low concentration diffusion layer, which is formed in a second silicon semiconductor layer thinner than the first silicon semiconductor layer by diffusing one of the P-type impurity or the N-type impurity with a low concentration, interposed therebetween; an interlayer insulation film which is formed on the first and second silicon semiconductor layers; a filter film which is formed on the interlayer insulation layer of one of the photodiodes and formed of a silicon nitride film transmitting rays of a wavelength range of the UV-A wave or a longer wave; and a sealing layer which covers the interlayer insulation film of the other of the photodiodes and the filter film and transmits rays of the wavelength range of the UV-B wave or a longer wave.

The invention provides an air purification system and method for combining filtration, ultraviolet irradiation, and photocatalysis, in an annular geometry that maximizes the photocatalytic efficiency of the ultraviolet light in the deactivation of microbes and the photocatalysis of volatile compounds.

In a motor unit as an example of the invention, a bearing assembly 5 is securely held on an inner circumferential portion of a hollow cylindrical section 11a of a first housing member 11 with an adhesive section 52 interposed therebetween. The adhesive section 52 includes: a first adhering subsection 52a in which an anaerobic adhesive is present and a second adhering subsection 52b in which an externally stimulated curing type adhesive cured by heating or ultraviolet irradiation is present. Inserting the bearing assembly 5 into the hollow cylindrical section 11a produces a temporarily fixed state by the first adhering subsection 52a, thereby enabling the external stimulated curing type adhesive to be stably cured in the temporarily fixed state.

An ink composition for ink jet providing excellent in the curability based on ultraviolet irradiation in the presence of water or a solvent, the ejection stability with respect to the factors such as dot loss or flight deflection, and the storage stability of ink. Also provided herein is an ink composition for ink jet including: a pigment; a water-soluble organic solvent; a surfactant; at least either of a urethane (meth)acrylate being represented by the following general formula (1) and having a weight average molecular weight of 1,000 to 10,000 and a cross-linked urethane (meth)acrylate having a constitutional unit including the urethane (meth)acrylate; a compound having a radical polymerizable group(s); a photoradical polymerization initiator; and water:

A¹-O—(CONH—B¹—NHCOO—C¹—O)_n—CONH—B¹—NH—COO-D¹  (1)

where each of A¹, B¹, C¹, D¹, and n in formula (1) are described herein.

The present invention discloses a white composition for ultraviolet solidification. The composition comprises the components of the weight percentages: (1) 10 percent to 40 percent of epoxy acrylate containing carboxyl; (2) 5 percent to 20 percent of polyurethane acrylic ester containing carboxyl; (3) 10 percent to 30 percent of super branching polyester acrylate; (4) 15 percent to 40 percent of acrylic monomer of single- or multi-functional degree; (5) 8 percent to 20 percent of titanium dioxide; (6) 1 percent to 8 percent of light initiator; (7) 0.5 percent to 3 percent of auxiliary aid; and (8) 0.5 percent to 10 percent of adhesive assistant agent. The construction process of the coating of the present invention is simple; the coating can be widely used (not limited) for various density boards, and solid plate materials. After the coating is solidified by ultraviolet irradiation, the coating film has good adhesive capability, high hardness, good covering capability and leveling performances.

The invention relates to an expansion material for a cast-in-situ hollow floor member, which comprises 4 to 15 percent of sulphoaluminate cement or ferro-aluminate cement, 50 to 65 percent of Portland cement, 18 to 35 percent of fly ash, and 2 to 10 percent of modifying agent (weight percentage). The invention adopts the sulphoaluminate cement or the ferro-aluminate cement to be mixed with the Portland cement to ensure that the expansion material has good performances of light mass, high strength, corrosion resistance, thermal insulation and so on, and then is matched with other modifying agents to ensure that the expansion material can save the using amount of the cement and ensure that a floor system has the advantages of high strength, permeation resistance, freezing resistance, cracking resistance, friction resistance, ultraviolet irradiation resistance, tensile resistance, compression resistance, shock resistance, and good sound insulation effect when reducing the weight of the floor system.

Decellularization of tissue by means of an amphipathic solvent a well-established practice. However, situations exist where the provision of enhanced decellularization is preferred. There is a demand for treating methods for coping with such situations. Thus, it is intended to provide a method for enhancing decellularization. The method comprises not only the immersing of a tissue in a solution containing an amphiphilic molecule in non-micellar form (for example, 1,2-epoxide polymer) but also performing a radical reaction (for example, treatment selected from the group consisting of exposure to gamma-ray irradiation, ultraviolet irradiation, a free radical supply source, ultrasonication, electron beam irradiation, and X-ray irradiation).

The invention provides a surface treatment method by which a substrate with desired uniform lyophilicity is obtained in order to enhance the formation of a film pattern by an ink-jet process; a surface-treated substrate obtained by the surface treatment; and a method of forming a film pattern.

A surface of a substrate is subjected to lyophobic treatment by forming a self-assembled layer composed of organic molecules. The lyophobicity is then modified by ultraviolet irradiation or the like to obtain desired lyophobicity.

Each of a pair of substrates respectively comprises an electrode and a rubbed alignment film on one surface, while the other surface is provided with a polarizer. The substrates are placed so that the surfaces provided with the alignment films are opposed to each other, and the area between the substrates is filled with a medium to form a material layer. Then, a medium made of a negative-type liquid crystalline compound sing a photopolymerizable monomer and a polymerization initiator is injected into the material layer held between the substrates. Further, ultra violet irradiation is performed with the medium exhibiting a liquid crystal phase, so that the photopolymerized monomer is polymerized, thus forming a polymer chain. In this manner, obtained is a display element, that causes change in degree of optical anisotropy in response to application of electric (external) field, which display element can be driven by a lower intensity electric (external) field.

An approach for the treatment of surfaces in public places with ultraviolet light is disclosed. In one embodiment, a disinfection illuminator having ultraviolet radiation sources can irradiate a number of contact surfaces. A control unit can control the ultraviolet irradiation of the contact surfaces. The disinfection illuminator is suitable for a wide variety of devices that are used by the general public. Gas station pumps, door knobs, key pads, and bathrooms are illustrative of examples of some devices and places having commonly-used surfaces that can be treated by the disinfection illuminator.

This invention provides a conductive elastic roller (1) comprising a shaft member (2), one or more elastic layers (3) disposed on an outside of the shaft member (2) in a radial direction and optionally one or more coating layers (4) disposed on an outside of the elastic layer (3) in a radial direction, characterized in that at least one of the elastic layers (3) is composed of an ultraviolet-curing type resin formed by curing the specified raw material for the elastic layer through ultraviolet irradiation.

The invention relates to a PVC homogeneous penetrating coiled material floor, a production process thereof and a device. The product comprises five layers which are UV curing layer, a wear-resisting transparent layer, a PVC colored basis material layer with embedded colored plastic granules, a stable layer and an elastic foaming layer from the upper part to the lower part respectively. The product has the advantages of transparent and artistic patterns in traditional process, simultaneously has the advantages that the wear resistant property is better, the surface is contamination resistant and ultraviolet irradiation resistant, the product stability is good, the elasticity is good, and the comfortable feeling is better. Simultaneously the device has low cost and simple production process, is easy to be operated and convenient for the industrialized production, and has better social and economic values.

The present invention is to provide a high transmittance glass sheet that has a composition containing as coloring components, expressed in wt. %, 0.005 to less than 0.02% of total iron oxide in terms of Fe₂O₃, less than 0.008% of FeO, and 0 to 0.25% of cerium oxide and having a ratio of FeO in terms of Fe₂O₃ to the total iron oxide of lower than 40%, and exhibits high visible light transmittance and solar radiation transmittance. Alternatively, a high transmittance glass sheet is provided that contains not more than 0.06% of total iron oxide and 0.025 to 0.20% of cerium oxide and has a ratio of a fluorescence intensity at 395 nm to a fluorescence intensity at 600 nm of 10% or higher when subjected to ultraviolet irradiation at a wavelength of 335 nm.

The invention relates to a hyper branched polyamide amine and metal nanometer compound and the preparation method and the application, belonging to the technical field of nanotechnology which is characterized in that: the compound comprises a polymer and metal nanometer particles, the polymer is the hyper branched polyamide amine made of blocking modification the hyper branched polyamide amine of the vinyl-terminated through different small organic molecules with amine, the content of the polymer is 89wt percent to 98wt percent; the metal nanometer particles are golden or silver nanometer particles, the content of the metal nanometer particles is 2wt percent to 11wt percent. During the preparation course, no reducing agent or ultraviolet irradiation is required, the precursor metal compounds are directly added into the hyper branched polyamide amine solution, and the metal nanometer particles with perfect water dispersion is generated only through one-step reaction under ambient temperature, the average particle size of which is one to eight nm, and the size is controllable. The inhibition zone method and the optical density method tested show that: the hyper branched polyamide amine and the metal nanometer particle compound have perfect antibacterial effects to a plurality of bacteria and fungus.

A method for producing a silica aerogel coating comprising the steps of organically modifying a wet gel formed by the hydrolysis and polymerization of an alkoxysilane having an ultraviolet-polymerizable unsaturated group, and subjecting a layer of the resultant organically modified silica to ultraviolet irradiation and baking.

The invention discloses an ultra violet radiation cross-linking polymeric material for 3D printing and a preparation method and a product thereof. Main components of the material contain, by weight, 100 parts of unsaturated resin and 0.5-5 parts of an UV cross-linking agent. In addition, the material also contains, by weight, 0.1-0.5 part of an antioxidant, 1-20 parts of a powder, 0-10 parts of a pigment and 0-5 parts of other auxiliary agents, which help enhance a printing effect of the material. With the addition of the UV cross-linking agent and by the utilization of ultraviolet irradiation, unsaturated resin is subjected to crosslinking after 3D printing extrusion so as to form a three-dimensional net structure. Heat resistance, resistance to chemical corrosion and mechanical strength of a moulding material are all raised to a large extent. Thus, unsaturated resin has a wider application prospect in 3D printing materials.

The present invention involves a system for irradiating articles with ultraviolet radiation that are transported through an irradiation tunnel along a longitudinal article treatment path from a tunnel entrance to a tunnel exit employing a conveyor system. Ultraviolet irradiation sources are located within the tunnel, both above and below the article treatment path. The conveyor system includes at least two different sequential segments that contact different laterally separated locations on the articles to be treated from beneath. The points of contact between the different segments of the conveyor system are offset in a lateral or transverse direction so that all locations on the articles are left unobscured from beneath at some location on the treatment path. As a consequence, all downwardly facing surfaces of the articles carried on the conveyor system are exposed to radiation from beneath. The ultraviolet irradiation sources may be configured as elongated, transverse tubes, at least some of which are located within elliptical reflectors so that some of the ultraviolet radiation is reflected onto the passing articles at angles that vary as the articles progress along the treatment path. The ends of the ultraviolet tubes are mounted within unique end supports that allow the tubes to be rotated one hundred eighty degrees by a single person manipulating just one end of each lamp tube.

The present invention provides a curable composition which comprises (A) a base-generating substance which generates a base when exposed to the action of ultraviolet light, (B) a siloxane polymer which has silicon-hydrogen bonds (Si-H) capable of reacting with hydroxy groups under the effect of the base to form silicon-oxygen bonds (Si-O) and hydrogen molecules (H2), and (C) an acid substance. This composition is cured by irradiation with ultraviolet light. During this ultraviolet irradiation, a mask is placed between a coating film of the composition and the radiation source, and the uncured portions of the composition are dissolved and removed so that a pattern is formed. The residual portions are then heated to produce a pattern-cured product.

The invention relates to a nanometer silver gelatine nanometer fiber film, which comprises the following parts: a gelatine nanometer fiber and a nanometer silver distributed in gelatine nanometer fiber homogeneously, wherein the nanometer silver particle attaches the surface of the gelatine nanometer fiber or in the fiber, the mean diameter of the gelatine nanometer fiber is 60-220nm, and the mean diameter of the nanometer silver is 4-50nm. The electrostatic spinning method comprises the following steps: making the spinning liquid by adding silver nitrate in gelatin-formic acid solution; getting the nanometer fiber film with silver ion by electrostatic spinning; deacidizing the silver ion in the fiber into the nanometer silver particle with ultraviolet irradiation method. The nanometer silver gelatine nanometer fiber film is used to make the artificial skin, the medical dressing, the hemostatic material and the sanitary cotton.

The present invention provides an optical layered body which prevents the occurrence of curling (warpage), has excellent durability while maintaining pencil hardness, and can prevent the degradation of durability of an image display screen by external light by using the optical layered body as a protective film of the image display screen.

An optical layered body including a light-transmitting substrate and at least a hard coat layer formed on the light-transmitting substrate, wherein the hard coat layer is formed by hardening a composition for a hard coat layer containing a polyfunctional (meth)acrylate ultraviolet curable resin, an ultraviolet absorber and a photopolymerization initiator by ultraviolet irradiation, and wherein the hard coat layer has a Martens hardness (A) of 230 to 320 N/mm² at the surface opposite to the light-transmitting substrate and has a Martens hardness (B) of 160 to 250 N/mm² at the surface on the side of the light-transmitting substrate, and the Martens hardness (A) is larger than the Martens hardness (B) and the elastic modulus of the hard coat layer varies continuously in the thickness direction.

An electron beam inspection apparatus images reflected electrons and cancels negative charging derived from electron-beam irradiation. Ultraviolet rays are irradiated and an irradiated area of ultraviolet rays is displayed as a photoelectron image. The photoelectron image and a reflected-electron image are displayed on a monitor while being superposed on each other, to easily grasp the positional relationship between the images and the difference in size between them. Specifically, the shape of the irradiated area of an electron beam includes the shape of the irradiated area of ultraviolet rays on a display screen. The intensity of the ultraviolet rays in the irradiated area of the electron beam is adjusted while the reflected-electron imaging conditions for the reflected-electron image are sustained. Moreover, an amount-of-ultraviolet ray adjustment mechanism is controlled on the monitor so that an amount of the ultraviolet rays is adjusted while observing a reflected-electron image obtained during ultraviolet irradiation.

The invention relates to a multifunctional fabric capable of shielding ultraviolet rays and having lasting superhydrophobic performance and a preparation method thereof, belonging to the technical field of functional textile materials. According to the invention, the surface of the fabric is modified with an inorganic nanometer particle coating; then, the inorganic nanometer particle coating is cladded by an inert oxide barrier layer; finally, the fabric is subjected to functional modification of surface hydrophobization. Since the inert oxide barrier layer has an inhibiting effect on photosensitivity of inorganic nanometer particles, a manufactured textile material presents lasting superhydrophobic performance under strong ultraviolet irradiation for a long time, and the ultraviolet ray shielding index of the manufactured fabric is greater than 100. The prepared multifunctional fabric capable of shielding ultraviolet rays and having lasting superhydrophobic performance is applicable to a variety of fields, e.g. medical science, military, biology and the optoelectronics industry.