564results about How to "Effective barrier" patented technology

A coating composition for fabrics includes wetted microspheres containing a phase change material dispersed throughout a polymer binder, a surfactant, a dispersant, an antifoam agent and a thickener. Preferred phase change materials include paraffinic hydrocarbons. The microspheres may be microencapsulated. To prepare the coating composition, microspheres containing phase change material are wetted and dispersed in a dispersion in a water solution containing a surfactant, a dispersant, an antifoam agent and a polymer mixture. The coating is then applied to a fabric.

The invention discloses a core holder. The core holder comprises a cylinder, a sample tube, a fixed plug, an adjustable plug, a heat insulation sleeve and a top sealing cover, wherein the cylinder is made of engineering plastic; a confining pressure cavity for accommodating the sample tube is formed in the cylinder; the heat insulation sleeve is sleeved outside the cylinder; a lower stepped part of the bottom end of the cylinder is provided with threads which are matched with threads of the fixed plug; the bottom end of the cylinder is sealed; an upper stepped part of the top end of the cylinder is provided with threads which are matched with the top sealing cover and the adjustable plug and seal the top of the cylinder; and a channel for displacing fluid circulation and a channel for confining fluid circulation are formed in the fixed plug and the adjustable plug. By the core holder, severe interference of temperature change of the core holder on a nuclear magnetic resonance probe coil can be avoided in a high-temperature high-pressure state.

The invention provides a light low-frequency wideband film metamaterial sound isolator. The light low-frequency wideband film metamaterial sound isolator is composed of a grid support, adhesive elastic films and balancing weights, wherein the grid support is made of rigid light materials and formed by square grids periodically extending in the x direction and y direction, the adhesive elastic films are bonded with the grid support in tensing mode, the balancing weights correspond to the square grids respectively and are periodically and additionally arranged on the adhesive elastic films, and each square grid, the corresponding adhesive elastic film and the corresponding balancing weight form a cellular which is a smallest acoustic metamaterial unit, used for isolating low-frequency noise, in the sound isolator. The light low-frequency wideband film metamaterial sound isolator is formed by periodically arranging the acoustic metamaterial units, and achieves coverage of a wideband, namely a wide frequency range through the balancing weights, of different weights, arranged in the adjacent cellulars. When the metamaterial units are stimulated by acoustic waves, the balancing weights and the tensioned adhesive elastic films generate a local resonance phenomenon, the average displacement of each whole cellular is zero, and sound is isolated efficiently.

The flow of resin during the molding of composite articles is controlled by forming areas of immobilized resin during the infusion of resin into the fibrous body. The immobilized resin is formed using an immobilization agent that interacts with the infused resin to form a high viscosity resin barrier that is effective in blocking the flow of non-immobilized resin. The barriers of immobilized resin are located within the fibrous body so as to control the flow of non-immobilized resin during the molding process to prevent or least reduce resin depletion and to selectively block resin flow from the mold.

The invention discloses a controllable-respiration preservative film and a preparation method thereof. The method comprises the following steps: dissolving a water-soluble polyhydroxy plasticizer in water, adding the reaction raw material, heating until the raw material is completely dissolved in water, dispersing at high speed, and cooling to 50-70 DEG C to prepare a solution for running filming; and running the solution for running filming onto a steel belt on a running production line via a die head, and drying to obtain the controllable-respiration preservative film. The controllable-respiration preservative film is prepared from the reaction raw materials in percentage by mass: 60-80% of polyvinyl alcohol, 10-30% of water-soluble polyhydroxy plasticizer, 1-5% of moisture respiration regulator, 1-3% of compatilizer, 3-10% of water retention agent and 0.5-3% of assistant. The preservative film has high barrier property for oxygen and nitrogen sources; the bidirectional permeation exchange power for moisture can be effectively regulated and controlled through the raw material formula; and thus, the preservative film can ensure free respiration and moisture exchange of fruits and vegetables in the preservation process.

Novel ceramide compounds, compositions containing them and the use of these compounds, in particular for strengthening the lipid barrier of the epidermis.

The multilayered steel armour consisting of the front-face ballistic-resistant armour layer (1) and the backing armour layer (2), which are fully metallurgically bonded by means of at least one joining metallic intermediate layer (3), for example, by casting, wide-area welding techniques, using technology of explosive cladding (high-velocity impact cladding), by roll welding or by a combination of the previous techniques. The joining metallic intermediate layer (3) between the front-face ballistic-resistant armour layer (1) and the backing armour layer (2) is made from the material featuring the face-centered cubic crystalline lattice (FCC lattice), in particular, from the nickel alloy containing maximally 98.0 wt % of nickel and/or from steel.

The invention discloses a weather-resistant high impact polystyrene material, which is characterized by comprising high impact polystyrene resin, an anti-ultraviolet agent, a toughener, an antioxidant, and a processing aid, and comprising the following components in part by mass: 80 to 100 parts of high impact polystyrene resin, 0 to 20 parts of general purpose polystyrene, 0.1 to 10 parts of light stabilizer, 1 to 15 parts of toughener, 0.1 to 1 part of antioxidant and 0.1 to 2 parts of processing aid. The weather-resistant high impact polystyrene material has high weather resistance and stable performance.

The invention discloses a method for preparing a modified ceramic diaphragm through a dopamine compound adhesive. The method comprises the following steps: compounding dopamine or polydopamine nanoparticles with an aqueous adhesive to form a compound adhesive, mixing the compound adhesive, nano ceramic particles and a water-based solvent, then coating the mixture on an organic microporous diaphragm substrate to form a modified ceramic layer, thereby obtaining the modified ceramic diaphragm, namely the nano ceramic particles are tightly adhered to the surface of the diaphragm substrate due to good infiltration and adhesion of the aqueous adhesive; meanwhile, through polydopamine, the thermal stability and the mechanical performance are improved; positive and negative electrodes are effectively blocked, so that the short circuit is avoided; the cycle performance of the battery using the modified ceramic diaphragm prepared by the method is improved.

The invention relates to a water circulating ecological system for aquaculture. The water circulating ecological system comprises an aquaculture main body ecological breeding tank, a biological purifying tank, a water purifying tank and a residue treatment ecological breeding tank. Environmental engineering for ecological breeding is constructed by the water circulating ecological system, and the breeding environment is controlled and optimized, so that aquaculture breeding dirt is cleared up by virtue of ecological mating of microorganism, plants and animals, and therefore, water self-cleaning effect of an ecological environment is achieved. By virtue of a recycling economy mode, the water is self-cleaned and utilized in a multi-stage manner to form an industrial chain of a plurality of products, so that duplex economic value added effect is produced. The production system ecologically controls the aquaculture, so that breeding water can be saved for over 70%, and water quality is regulated and optimized, and therefore, healthy aquaculture is implemented.

The invention discloses a portable underground water fixed-depth sampling device, a sampling system and a sampling method, and belongs to the field of site pollution investigation and risk assessment.A moving blocking air bag is arranged; stagnant water at the upper end and the lower end of an underground water sampling probe in a well pipe is effectively blocked, an underground water sample at the depth where the sampling probe is located can be accurately collected, the problem that in the well washing sampling process of a traditional method, upper-layer water samples and lower-layer watersamples in the well pipe are mixed, and consequently sample dilution is caused is solved, and the concentration detection accuracy is improved. Underground water samples of different depths can be accurately collected in the same monitoring well, fixed-depth sampling is achieved, and the cost is obviously reduced. In addition, the stagnant water on the upper layer and the lower layer of the underground water sampling probe in the well pipe is effectively blocked, the well washing volume before sampling can be reduced, the sampling time is saved, the sampling efficiency is improved, the well washing wastewater generation amount is reduced, the sampling cost is further reduced, disturbance to underground water in the well pipe can be reduced, and the accuracy of detected concentration is guaranteed.

Crosslinkable substituted fluorene compounds; oligomers and polymers prepared from such crosslinkable compounds; films and coatings; and multilayer electronic devices comprising such films are disclosed.

A cleaning assembly (2) for an optical device (16) includes a shaft (14) configured for supporting the optical device within an enclosure (4) that is adapted for rotation about the shaft. At least one first sealing element (18) is disposed between the shaft and a mating surface of the enclosure for preventing fluid leakage therethrough. At least one optically transparent window (8) is mounted in association with the enclosure (4), and at least one cleaning element (9, 11) is coupled to the shaft for cleaning a surface of the window (8). The cleaning assembly may include a moisture barrier in the form of a pressure-influenced member (58) such as a bellows (40) having a body of expandable and retractable-volume for containing air that diffuses therein, while equalizing pressure on opposite sides of the barrier.

A foldable foam-based divider device includes a plurality of panels, each panel including a middle foam plate and front and back semi-rigid paper plates mounted on and sandwiching the middle foam plate, the middle foam plate further including at least one outwardly extending connecting tab and at least one tab-receiving recess with adjacent ones of the plurality of panels connected to one another in accordion-like fashion with the connecting tab extending into the tab-receiving recess and being secured therein by connection of the front and back semi-rigid paper plates to the connecting tab. The plurality of panels is movable between a closed position with the plurality of panels forming a folded stack of generally parallel panels and an opened position wherein the plurality of panels forms an extended wall operative to selectively divide an area.

The mastitis control teat dip composition having a visible indicator aspect of the invention provides a softening, soothing, smoothing, relaxing property, a rapid initial kill, a useful highly pseudoplastic rheology, a barrier/film-forming capacity, a unique antimicrobial composition that is stable over an extended period of time, and unexpected long term microbial control when compared to the prior art materials disclosed in patents and used in the marketplace. The indicator aspect provides ease of visually detecting the material on the animal skin and can indicate efficacy of the material. The compositions of the invention are made by combining an aqueous liquid composition containing the visual indicator combined with the organic components which can be combined with a simple aqueous solution of a salt of chlorous acid, preferably an alkali metal chlorite. The materials after they are combined and blended into a smooth viscous material containing an emollient package generates active antimicrobial chlorine dioxide and can be immediately contacted with the target animals. The compositions of the invention provide stable visual indication, rapid initial kill, consistent long term kill with chemical and rheological stability.