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47results about How to "Specific strength" patented technology

Sparse media edi apparatus and method

An electrodeionization, (EDI) apparatus has flow cells with a sparse distribution of ion exchange (IX) material or beads. The beads extend between membranes defining opposed walls of the cell to separate and support the membranes, and form a layer substantially free of bead-to-bead dead-end reverse junctions. The beads enhance capture of ions from surrounding fluid in dilute cells, and do not throw salt when operating current is increased. In concentrating cells, the sparse bead filling provides a stable low impedance bridge to enhanced power utilization in the stack. A monotype sparse filling may be used in concentrate cells, while mixed, layered, striped, graded or other beads may be employed in dilute cells. Ion conduction paths are no more than a few grains long and the lower packing density permits effective fluid flow. A flow cell thickness may be below one millimeter, and the beads may be discretely spaced, form a mixed or patterned monolayer, or form an ordered bilayer, and a mesh having a lattice spacing comparable to or of the same order of magnitude as resin grain size, may provide a distributed open support that assures a stable distribution of the sparse filling, and over time maintains the initial balance of uniform conductivity and good through-flow. The cells or low thickness and this resin layers relax stack size and power supply constraints, while providing treatment efficiencies and process stability. Reduced ion migration distances enhance the ion removal rate without reducing the product flow rate. The sparse resin bed may be layered, graded along the length of the path, striped or otherwise patterned. Inter-grain ion hopping is reduced or eliminated, thus avoiding the occurrence of salt-throwing which occurs at reverse bead junctions of prior art constructions. Conductivity of concentrate cells is increased, permitting more compact device construction, allowing increases in stack cell number, and providing more efficient electrical operation without ion additions. Finally, ion storage within beads is greatly reduces, eliminating the potential for contamination during reversal operation. Various methods of forming sparse beds and assembling the stacks are disclosed.
Owner:IONICS INC

Special material for wood plastic extrusion foaming and preparation method thereof

The invention relates to a special material for wood plastic extrusion foaming in the technical field of high polymer materials. The composite material is mainly compounded by polypropylene, a foaming agent, a blowing promotor, a cross-linking agent, an assistant crosslinker, a compatilizer, a coupling reagent, a nucleating agent and wood powder. The preparation method of the composite material comprises the following steps of carrying out activating treatment on the wood powder, blending the wood powder and polypropylene as well as various addition agents uniformly through a high mixing machine, extruding by a twin screw and foaming once to prepare the material. The special material for polypropylene or wood powder extrusion foaming has the characteristics of light weight, specific strength, waterproofing, anticorrosion and heat preservation, and the prepared product has the processing characteristic that the timber can be nailed, sawed and planed; the special material not only has good mechanical property and thermal property, but also has excellent environmental protection properties such as being recyclable and degradable and the like; the special material can be widely used in fields of construction, transportation and packaging as well as household decoration and daily necessities markets; the special material can be recycled directly, does not damage the surface of the packed objects due to the soft texture of the material, can be used as a packaging material for electrical equipment, computers, cameras and the like, can be used for skin packaging of glass ware, precise workpieces and quick-wear parts, and can substitute for a PS (polystyrene) foam material.
Owner:TIANJIN DEHAO NEW MATERIALS

A deep-sea long-term pressure-resistant composite structure and its manufacturing method

The invention relates to a deep-sea long-term working pressure-resistant composite structure and its manufacturing method, including a metal head, the shape of which is a part of a double-curvature body of revolution, and the upper part of the metal head is fitted with a metal preset Carbon fiber pressure-resistant shell, the metal head, metal pre-assembled parts and carbon fiber pressure-resistant shell are combined and installed to form an elliptical double-curvature structure of revolution, and the metal head and metal pre-set parts are sealed by a conical surface. It is locked with bolts and anti-loosening gaskets, and the outer surface of the carbon fiber pressure-resistant shell is coated with a polyurea waterproof coating. The invention has the advantages of light weight, tightness, good durability, etc., and can significantly increase the payload of deep-sea equipment; the structure presents a complete streamlined shape with one end pointed and one end blunt, and the resistance is small when moving vertically in water; in deep-sea work Keeping the tip upward is beneficial to reduce the acoustic target characteristics of the structure; the manufacturing method of the composite structure in the present invention has the advantage of low cost.
Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)

Preparation method of composite transverse stabilizer bar and transverse stabilizer bar prepared by preparation method

The invention discloses a preparation method of a composite transverse stabilizer bar and the transverse stabilizer bar prepared by the preparation method. The preparation method comprises the following steps of step 1, preparing a transverse stabilizer bar preform according to the designed size and shape of the transverse stabilizer bar, specifically, preparing a central layer and a wrapping layer of the transverse stabilizer bar according to design requirements, and splicing a central layer material rod and the wrapping layer to form the transverse stabilizer bar preform; step 2, curing thetransverse stabilizer bar preform, specifically, putting the transverse stabilizer bar preform into a mold, and injecting resin into the mold to be cured; and step 3, post-curing and post-processing the transverse stabilizer bar. According to the preparation method, the bar body of the manufactured transverse stabilizer bar comprises the central layer and one or more wrapping layers wrapping the central layer, the wrapping layer is a composite material weaved by reinforced fibers, and the bar body is of a solid structure or an internal hollow structure. The preparation method is high in efficiency, and the prepared stabilizer bar has the advantages of being light in weight, high in strength and not prone to rusting.
Owner:ZHEJIANG SCI-TECH UNIV
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