411results about How to "Good strength performance" patented technology

A laminated, bioimplantable dural graft product is configured for use as both an onlay graft and a suturable graft. The dural graft product is sufficiently pliable so as to sufficiently conform to a curvature of a tissue surface to which it is applied, such as the curved surface of a meningeal membrane. The use of the graft product can have improved properties, including suture retention strength and fluid impermeability. To use the dural graft product as an implant to replace, reinforce or strengthen bodily tissue, or to act as an adhesion barrier, the dural graft is placed in contact with bodily tissue and conforms to the curvature of the bodily tissue. Sutures can be used to maintain the contact between the dural graft and the bodily tissue.

The invention provides an osteosynthesis and compression screw that is self-boring and self-tapping for the purpose of coaptation of small bone fragments. The screw comprises: a proximal portion formed by a screw head provided with an outside thread; an intermediate portion having no thread; and a distal portion provided with an outside thread. Wherein: each of the screw head and the distal portion includes at least one groove, firstly extending over the entire axial length of its thread, and secondly being formed through each thread in such a manner to form tapping means; and the terminal zone of the distal portion is provided with preparation means for preparing a housing in the bone fragments for receiving the intermediate and distal portions of the screw.

The invention provides a technology for processing high strength large hexagon-headed bolt used for steel structure. The invention relates to a technology for processing high strength connecting piece. High frequency induction current hot forging and cold extruding are adopted, so as to produce a bolt. The invention is on the basis of patent application with patent application number of 200810020090.5, high frequency induction heating is adopted in hot forging, frequency thereof is controlled to be 20000-50000Hz, and the advantages of high frequency induction heating that speed is fast and heating is uniform are utilized, so that work piece surface can obtain uniform tissue and properties from center part to the surface, heating uniformity of work piece is improved, better crystal phase structure can be obtained, and high strength bolt with better property can be obtained.

A catalyst, catalyst precursor, or catalyst carrier formed as an elongated shaped particle having a cross section comprising three protrusions each extending from and attached to a central position. The central position is aligned along the longitudinal axis of the particle. The cross-section of the particle occupies the space encompassed by the outer edges of six outer circles around a central circle, each of the six outer circles contacting two neighbouring outer circles, the particle occupying three alternating outer circles equidistant to the central circle and the six interstitial regions, the particle not occupying the three remaining outer circles which are between the alternating occupied outer circles. The ratio of the diameter of the central circle to the diameter of the outer occupied circle is more than 1, and the ratio of the diameter of the outer unoccupied circle to the diameter of the outer occupied circle is more than 1. The ratio of the diameter of the outer unoccupied circle to the diameter of the outer occupied circle is more than the ratio of the diameter of the central circle to the diameter of the outer occupied circle.

The invention relates to lightweight aggregate concrete for heat preservation of structures, and belongs to the technical field of building materials for civilian use. The lightweight aggregate concrete for heat preservation of structures comprises the following raw materials in parts by mass: 360-460 parts of cement-based cementing material, 410-460 parts of ceramsite, 110-120 parts of modified vitrified micro balls, 15-20 parts of concrete modifier, 260-290 parts of water and 3.6-4.6 parts of water reducing agent. The lightweight aggregate concrete for heat preservation of structures with the heat conductivity coefficient of 0.25-0.4W/(m.K) and the dry apparent density of 900-1200kg/m<3> is obtained by using the modified vitrified micro balls and the ceramsite as aggregates under the synergistic effect of the components according to a reasonable component proportion, and after the lightweight aggregate concrete is cured for 28 days, the compressive strength of the lightweight aggregate concrete is 8-15MPa. The lightweight aggregate concrete for heat preservation of structures has good heat preservation performance and relatively high strength. Compared with the strength of a full lightweight concrete material prepared from ceramsite perlite, the strength of the lightweight aggregate concrete is obviously improved; compared with the heat conductivity coefficient of a full lightweight concrete material prepared from ceramsite pottery sand, the heat conductivity coefficient of the lightweight aggregate concrete is obviously reduced; and the lightweight aggregate concrete can be used as a lightweight aggregate concrete material for heat preservation of structures.

The invention relates to a method for manufacturing wood plastic composite material by using plant straw and waste plastics and materials thereof. Polyester and plant wood fiber materials such as sawdust, bamboo powder, rice hull, straw, and the like, are mixed according to certain ratios, a tailor-made additive is added, and after the processes of high temperature, extrusion, molding, and the like, the composite building profile is manufactured. The wood plastic material can replace wood, plastics, and the like, and is mainly used in the industries of packaging, building materials, furniture, logistics, and the like. The invention has simple processing technology, and the product has good processing properties and strength property, good water proof and corrosion resistant property and adjustability, the materials have wide sources and applications, especially the plant straw and waste plastics which contain waste mulch film and are recovered under the northern planting pattern of mulch film can be used for production, thus using the waste and restraining the current pollution of the mulch film planting to the lands effectively.

Woven preforms, for example those used for jet aircraft engine fancases, may need additional stiffeners to improve the strength and/or dynamic performance of the preform assembly, as well as to serve as attachment points. The present invention describes several improved woven preforms that include circumferential or axial stiffeners, as well as methods of manufacturing the same. One embodiment includes circumferential stiffeners added to a woven preform. Another embodiment includes sub-preforms with integral flanges that combine to make integral stiffeners. A further embodiment includes an intermediate stiffener wrapped onto a base sub-preform wrap, wherein the intermediate stiffener wrap incorporates intermediate stiffeners. Another embodiment incorporates bifurcations in one or more layers of an outermost wrap of a multi-layer fabric composite that forms a preform, wherein the bifurcated outer wrap is folded to form stiffeners that may be oriented circumferentially or axially.

The invention discloses aramid nanofiber/MXene composite conductive aerogel and a preparation method thereof. By using aramid nanofibers with a nano-scale structure, high strength, a large length-diameter ratio and high temperature resistance as a matrix and using MXene with excellent conductivity, good chemical stability and a unique two-dimensional nano-film structure as a conductive and fillingcoating material, the aramid nanofiber/MXene composite conductive aerogel with low density, high strength and high compression resilience is prepared. The preparation method specifically comprises the following steps: preparing an aramid nanofiber dispersion liquid, preparing an MXene dispersion liquid, preparing an aramid nanofiber/MXene composite dispersion liquid, preparing a gelatinous aramidnanofiber/MXene composite material and the like, thereby obtaining the aramid nanofiber/MXene composite conductive aerogel. The preparation process is simple and easy to implement, and the obtained aramid nanofiber/MXene composite conductive aerogel has wide application prospects in the fields of pressure sensing, intelligent sensors, wearable equipment and the like.

A method for producing a single-clad or multiple-clad product includes providing a welded assembly comprising a cladding material disposed on a substrate material. Both the substrate material and the cladding material are individually selected alloys. At least a first edge of the cladding material of the welded assembly does not extend to a first edge of the substrate material and thereby provides a margin between the first edges. A material that is an alloy having hot strength greater than the cladding material is within the margin and adjacent the first edge of the cladding material. The welded assembly is hot rolled to provide a hot rolled band, and the material within the margin inhibits the cladding material from spreading beyond the edge of the substrate material during the hot rolling. In certain embodiments of the methods, the substrate material is stainless steel and the cladding material is nickel or a nickel alloy.

The invention comprises a method of making a cement-based object or structure having a compressive strength greater than about 1,000 psi. The method comprises placing a cement-based material in an insulated concrete form, wherein the insulated concrete form has an R-value of at least 1.5, wherein the cement-based material comprises approximately 10% to approximately 80% by weight portland cement, and at least one of approximately 10% to approximately 90% by weight slag cement and approximately 5% to approximately 80% by weight fly ash. The invention also comprises a method of making a cement-based object or structure. The invention further comprises objects or structures made by the foregoing methods.

The present invention relates to a filler or a filler mixture containing carbonate, as well as to a process for manufacturing the same by precipitating the filler directly into the pulp or, as a separate process without the presence of fibres, particularly from the wire water of the paper or board manufacture. The invention also relates to a fibre product containing this filler, such as a paper or board product, or a plastic, rubber, concrete or paint product.

The invention relates to a polyester micro-porous film having waterproof ventilating and drenching functions, a three-layer compound material, a preparation method and the application thereof. The blend of polyethylene glycol terephthalate, polyethylene terephthalates, Valox and low-melting polyester is the base of polymer. Inorganic filler and processing agent are added in order to prepare polyester micro-porous film having waterproof ventilating and drenching functions. Based on the softening point difference among the low-melting polyester in the polymer base of the micro-porous film and the PET, PTT and PBT, the high intensity three-layer compound material having waterproof, ventilating and drenching functions is prepared by hot-pressing the inner and outer layers of polyester non-woven fabrics, with a polyester micro-porous film in the middle layer. The compound material of the invention can be used as a waterproof ventilating and drenching cushion ply on a slope roof and also can be used as a waterproof drenching cushion ply on the inner side of the hanging type decoration materials on the outer wall of building.

A flame retardant thermoplastic composition comprising in combination a polycarbonate homopolymer or copolymer comprising repeat carbonate units having the following structure:

wherein R₁ and R₂ are independently at each occurrence a C₁-C₄ alkyl, n and p are each an integer having a value of 1 to 4, and T is selected from the group consisting of C₅-C₁₀ cycloalkanes attached to the aryl groups at one or two carbons, C₁-C₅ alkyl groups, C₆-C₁₃ aryl groups, and C₇-C₁₂ aryl alkyl groups; an impact modifier, wherein the impact modifier comprises wherein the impact modifier comprises a rubber modified thermoplastic resin comprising a discontinuous elastomeric phase dispersed in a rigid thermoplastic phase, and wherein the impact modifier has a specific mean particle size and Q value; and a flame retardant. The compositions have excellent scratch resistance as well as an improved balance of physical properties such as impact strength and spiral flow, while at the same time maintaining their good flame performance.

The invention discloses a preparation method for a bottom mud brick. Riverway bottom mud serves as a raw material, the riverway bottom mud, plant straws, waste glass powder and a binding agent are mixed in proportion, and the preparation method comprises the following steps that: steel slag is added for evenly mixing; a moisture content is adjusted to be 20-40%, even stirring and beating homogenizing are carried out, and a brick making die is used for pressing and compression molding; the moisture content is adjusted to be 1-5% in a dried mode; and the bottom mud brick is made through high-temperature calcination of a muffle furnace. The bottom mud brick prepared by the method is high in strength, good in water permeability, multiple in hole, less in energy dissipation, less in heavy metal dissolution and low in biotoxicity. The preparation method utilizes bottom mud of heavy-polluted riverways, therefore, solidification of heavy metals in polluted bottom mud is achieved, damage of the bottom mud to environment is reduced, and simultaneously, resource recycling of the bottom mud is achieved.

The invention discloses a non-steamed brick and a preparation method thereof. The non-steamed brick comprises the following components in percentage by weight: 60 to 85 percent of iron tailings, 5 to 18 percent of river sand, 8 to 20 percent of cement, and 0.5 to 3 percent of admixture, wherein the admixture is one or more of high-strength adhesive, water reducing agent and waterproof agent. The preparation method comprises the steps of proportioning, mixing, pressure molding and natural curing. Proved by practice, the non-steamed brick has simple component, low cost and excellent comprehensive performance; and the preparation method is mild in conditions and easy in operation.

The invention relates to an Al-Zn-Mg alloy, which comprises the following components: 1-3wt% of Zn, 3-9wt% of Al, 0.5-0.9wt% of Ti, 0.07-0.14wt% of Zr, 0.02-0.11wt% of Re and the balance of iron and inevitable impurities. The alloy can also comprise Y, Mn, Sr and Nb. The strength of the Al-Zn-Mg alloy provided by the invention is improved by adding Zn, Al, Ti, Zr and Re into Mg base, and the goodstrength effect is realized by adding the components of different proportions; and in the preparation method, the Al-Zn-Mg alloy precipitate is hardened by three steps of ageing treatment, so that the hardness of the obtained Al-Zn-Mg alloy is very high.

A method in connection with the production of mechanical pulp from a cellulose containing material wherein the material is processed in at least one refining step to produce pulp. According to the invention, the pulp is fractionated (4), after a first refining step (1), in order to separate primary fines (5) from the pulp. The invention also relates to a mechanical pulp, produced by the method, and to a paperboard, which at least partly consists of such mechanical pulp.

A flame retardant thermoplastic composition comprising in combination a polycarbonate component; an impact modifier composition, the components of the impact modifier composition comprising a) a bulk polymerized ABS, and b) an impact modifier different from the ABS; and a flame retardant. The compositions have an improved balance of physical properties such as impact strength and flow, while at the same time maintaining their good flame performance.

The present invention concerns a process for modifying a lignocellulosic fibre material. In particular, the present invention gives new properties to the fibrous matrix of the material. This is achieved by producing fibrous products with modified properties by activating the fibres of the matrix with an oxidizing agent and attaching compounds to the activated fibre in order to incorporate desired, pre-selected properties in to the fibre matrix. The invention makes possible to produce novel kinds of fibrous materials having practically a large variety of properties. Examples of such properties include hydrophobic hydrophilic character.

This invention relates to a natural rubber-rich rubber composition and tire with tread thereof. A partial replacement of the natural rubber in the natural rubber-rich tire tread is accomplished by an inclusion of a specialized trans 1,4-styrene/butadiene copolymer rubber characterized by having a combination of bound styrene content and microstructure limitations. The tire tread rubber composition is comprised of a blend of the specialized trans 1,4-styrene/butadiene rubber and cis 1,4-polyisoprene natural rubber optionally together with at least one additional diene-based elastomer in which the natural rubber remains a major portion of the elastomers in the tread rubber composition. A significant aspect of the invention is a partial replacement of natural cis 1,4-polyisoprene rubber in the tread rubber composition. The specialized trans 1,4-styrene/butadiene rubber has a bound styrene content in a range of from about 15 to about 35 percent and a microstructure of its polybutadiene portion composed of from about 50 to about 80 percent trans 1,4-isomeric units, from about 10 to about 20 percent cis 1,4-isomeric units and from about 2 to about 10 percent vinyl 1,2-isomeric units; preferably a Mooney (ML1+4) at 100° C. viscosity value in a range of from about 50 to about 100, alternately from about 50 to about 85, and preferably a glass transition temperature (Tg) in a range of from about −60° C. to about −90° C.

A reactive cationic polyacrylate emulsion and preparation method and application thereof, belong to the technical field of paper making, printing and packaging. Components including styrene that accounts for 40-50% of the total monomer quality, butyl acrylate monomer that accounts for 40-50% of the weight of total monomer, acrylamide that accounts for 5-12% of the weight of total monomer, dimethyl diallyl ammonium chloride that accounts for 5-12% of the weight of total monomer, protective colloid polyvinyl alcohol that accounts for 0.1-0.6% of weight of total monomer, hexadecyl trimethyl ammonium chloride that accounts for 1-5% of the weight of total monomer, alkylphenol ethoxylates-10 that accounts for 1-5% of the weight of total monomer, allyloxy nonylphenol polyoxyethylene 5-9%, and initiator potassium persulfate 0.5-1.2%, are used for preparation of cationic polyacrylate emulsion; and the cationic polyacrylate emulsion, water and alkyl ketene dimmer are homogenizedly mixed. The reactive cationic polyacrylate emulsion provided by the invention has good stability and can improve paper intensity and water resistance.