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165results about How to "Not easy to deteriorate" patented technology

Preparation method of layer-by-layer self-assembled hollow fiber forward osmosis membrane

The invention discloses a preparation method of a layer-by-layer self-assembled hollow fiber forward osmosis membrane. The preparation method comprises the steps of: preparing hollow fiber forward osmosis base film, modifying hollow fiber ultrafiltration base film, repeating layer-by-layer assembly of polycation and polyanion layers, performing interface cross-linking polymerization for preparinga selective functional layer, conducting moisturizing, and carrying out treatment and storage so as to prepare the layer-by-layer self-assembled hollow fiber forward osmosis membrane. The surface of the hollow fiber self-support base film which is prepared by using a phase conversion method is activated firstly, layer-by-layer assembly of polycation and polyanion is repeated on the surface of thefilm so as to form an functional polarization layer for an electrolyte solution, and the polyamide selective layer is prepared through interfacial chemical cross-linking polymerization. The prepared hollow fiber forward osmosis membrane has a controllable thickness and an internal polarization layer with a high charge capacity, and the internal concentration polarization phenomenon can be alleviated effectively during the forward osmosis process; therefore, the hollow fiber forward osmosis membrane can simultaneously obtain high flux and low reverse salt flux, has high filtration separation efficiency, easy cleaning and a long service life, and can be widely applied to seawater desalination and concentration and desalination of brine.
Owner:西安金藏膜环保科技有限公司

Pneumatic pinch valve

The present invention provides a pneumatic pinch valve, comprising: a lever and a pressing piece, a fluid tube receiving space being formed between the lever and the pressing piece, wherein the pneumatic pinch valve further comprises a main body providing a cavity therein, the lever being installed on the main body; a piston provided in the cavity of the main body, the piston engaging with an inner wall of the cavity of the main body so as to divide the cavity into a first cavity and a second cavity, the pressing piece being positioned in the second cavity and supported on the piston; an air inlet port provided at the first cavity, wherein air introduced into the first cavity via the air inlet port moves the piston toward the fluid tube receiving space so as to press the fluid tube through an engagement of the pressing piece on the piston with the lever, and thus intercept the fluid in the fluid tube; and an air discharge mechanism provided at the piston, by which the piston pushes the air introduced into the first cavity, and then discharges the air into outside, so that the pressing piece releases the fluid tube to allow the intercepted fluid to flow through the fluid tube. Since the pneumatic pinch valve is communicated with the air source via the air inlet port and controls the interception and release of fluid in the flow passage in a pneumatic manner, the construction of the pneumatic pinch valve is simple. Moreover, since the pressurized amount of the fluid tube or the pressure of the air source can be adjusted, i.e. adjusting the pinching force applied to the fluid tube, the fluid tube is not easily deteriorated during long-time operation.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

Decorative article having white coating and method for manufacture thereof

The first personal ornament of the present invention is constituted of an ornament base article made of a metal or the like; an underlayer, preferably non-nickelic, formed on the base article; and a coloring layer constituted of an abrasion-resistant layer of 0.2-1.5 mum thick formed by dry-plating on the surface of the underlayer and an outermost layer of 0.002-0.1 mum thick formed by dry-plating on the surface of the abrasion-resistant layer. The coloring layer is a white hard coating film of a stainless-steel color. This ornament has a white coating film which gives superior quality, having high scratch resistance, not causing deterioration of appearance by scratching, and yet has high-quality image like a stainless steel film. The ornament having underlayer which does not contain nickel will not cause nickel metal allergy, and has a white coating film which gives superior quality, having high scratch resistance, not causing deterioration of appearance by scratching, and yet has high-quality image like a stainless steel film. The second personal ornament of the present invention is constituted of the aforementioned ornament base article; an underlayer formed on the base article; a titanium carbide layer of 0.5-1.0 mum thick formed by dry-plating on the surface of the underlayer; and an ornamental coating layer of 0.03-0.06 mum thick formed from platinum (alloy) by dry-plating on the surface of the titanium carbide layer. The ornamental coating layer is constituted of a hard white film having a platinum (alloy) color. This ornament has high scratch resistance, not causing deterioration of appearance by scratching, and yet has superior quality with a characteristic platinum (alloy) color. The present invention provides also a process for producing the above ornaments.
Owner:CITIZEN WATCH CO LTD
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