173results about How to "High rebound rate" patented technology

An interconnection system that includes a daughter card and backplane electrical connectors mounted to printed circuit boards at connector footprints. The spring rate of beam-shaped contacts in the daughter card connector increases while mating with the backplane connector so that the retention force may be greater than the insertion force. Such a change in spring rate may be achieved by positioning the beam-shaped contacts adjacent a surface of a connector housing. That surface may include a projection that aligns with the beam-shaped contact. When the connectors are unmated, the beam-shaped contact may be spaced from the projection. As the connectors begin to mate, a central portion of the beam-shaped contact may be pressed against the projection, which has the effect of shortening the beam length and increasing its stiffness.

An interconnection system that includes a daughter card and backplane electrical connectors mounted to printed circuit boards at connector footprints. The spring rate of beam-shaped contacts in the daughter card connector increases while mating with the backplane connector so that the retention force may be greater than the insertion force. Such a change in spring rate may be achieved by positioning the beam-shaped contacts adjacent a surface of a connector housing. That surface may include a projection that aligns with the beam-shaped contact. When the connectors are unmated, the beam-shaped contact may be spaced from the projection. As the connectors begin to mate, a central portion of the beam-shaped contact may be pressed against the projection, which has the effect of shortening the beam length and increasing its stiffness.

An interconnection system that includes a daughter card and backplane electrical connectors, each mounted to a printed circuit board at a connector footprint. The backplane connector has conductive elements with transition regions that allow the mating contact portions to be positioned on a uniform pitch while contact tail portions can be shaped to improve signal integrity or to provide a more compact and / or mechanically robust footprint. The conductive elements in both connectors are configured such that the contact tails of the ground conductors align from column to column, but the planar portions of the ground conductors in one column align with a pair of signal conductors in the other column, which improves mechanical and signal integrity. Mechanical integrity may be improved by forming the connector footprints with pads for the ground conductors that span multiple columns.

The present invention relates to dual-spring assembly that may be employed in cooperation with a damper unit to form a shock absorber. The spring rate of at least one of the springs is adjustable with a preload mechanism, which in turn is movable relative to the damper unit. Further, the dual-spring assembly includes two compression springs arranged in series and each having selected, but different spring rates. The first spring primarily absorbs the energy of applied loads that are below a first amplitude or threshold of applied load. Once the applied loads exceed the first amplitude of applied load, the dual-spring assembly operates with an effective spring rate to absorb the energy of applied loads that exceed the first amplitude of applied load. After a second spring of the dual-spring assembly achieves a desired amount of deflection, the first spring continues to absorb energy from the applied loads.

The invention belongs to the field of high-molecular material processing, and specifically relates to a polypropylene long-carbon-chain nylon blend and a preparation method thereof. The high-toughness polypropylene long-carbon-chain nylon blend comprises the following components in percents by mass: 50-95 wt% of polypropylene, 1-40 wt% of long-chain nylon, 1-15 wt% of a reaction compatibilizer or a filling material, 0.2-1 wt% of an anti-oxidant and 0.1-0.5 wt% of a lubricant. By adding the long-carbon-chain nylon and the reaction compatibilizer or the filling material, the toughness of polypropylene is improved, and the blend is not reduced in tensile strength and has relatively low viscosity, the blend is beneficial to extrusion processing, and has extremely good comprehensive performances.

The invention relates the making method of polyurethane solid tyre used for industry vehicle. The polyurethane solid tyre comprises the metal rim which has supporting and conveying action and the single-lay or double-lay polyurethane which is bonded on metal rim. The single-lay or double-lay polyurethane used in outer layer is oligomer polyatomic alcohol- methyl diphenylene diisocyanate / toluene diisocyanate, and the single-lay or double-lay polyurethane used in inner layer is oligomer polyatomic alcohol-3,3'- dimethyl-4,4'-biphenyl diisocyanate. The carcass has the advantages of long lifetime, non pollution, good heat-sinking capability and not blasting. The cost is low, technology is simple, and it is easy to realize the industrial production.

A gearbox assembly for all electric power steering apparatus comprises an input shaft which carries a worm gear and is supported relative to the housing at one end by a first bearing assembly and at the other by a second bearing assembly, an output shaft which carries a wheel gear which is fixed relative to a housing and which meshes with a worm gear on the input shaft, and a spring assembly which acts between the housing and the first bearing assembly, and the spring assembly applying a biasing force onto the second bearing in a first direction away from the neutral position so as to ensure that the worm and wheel are fully engaged. The spring assembly has a spring rate which has a step change about the neutral position such that the rate of change in the force exerted by the spring assembly on the second bearing assembly as the spring moves in the first direction from its neutral position is lower than the rate of change in the force as the spring moves in the second direction away from the neutral position.

The invention relates to the field of rubber products, and concretely relates to an application of low-ammonia or zero-ammonia latex in a natural latex foamed product. The invention also provides thenatural latex foamed product. The natural latex foamed product is prepared from, by weight, 100 parts of the latex, 2-3 parts of a vulcanizing agent, 0.5-3 parts of a foaming agent, 0.5-1.5 parts of agelling agent, 3-5 parts of an activator, 3-12 parts of an assistant and 20-100 parts of a filler. The natural latex foamed product has the advantages of excellent foam stability, uniform cell size,structured and stable hole structure and few internal defects, and produced sponge products have the advantages of large permanent compression set, low tensile strength, low elongation at break, and significantly improved resilience rate.

The invention relates to an environment-friendly thermoplastic elastomer particle for filling an artificial turf and a preparation method of the thermoplastic elastomer particle. The preparation materials of the thermoplastic elastomer particle comprise the following various components by the total mass of the various components: (A) 30%-70% of a thermoplastic material, (B) 0-25% of mineral oil, (C) 10%-40% of thermoplastic polyurethane elastomer, (D) 10%-50% of inorganic filler, (E) 0.1%-3% of UV-resistant aid, and (F) 0.5%-6% of color master batch or toner. The various components are melted and blended at a certain proportion to obtain a composition aggregate, the thermoplastic elastomer particle can be recycled, is environment-friendly and pollution-free and is colorful, the rebound resilience and the abrasion resistance are obviously improved, the particle is convenient to produce, the form of the particle can be regulated and controlled, and the packing density is low.

A stretchable belt (1) provided for medical purposes for use on the body of a patient has at least one sensor (8) for detecting at least one parameter of the patient's body. An adaptation to different body sizes and motions of the patient is provided without separate length adjusting members being necessary or without the need to stock different belt sizes. Furthermore, the belt is able to be manufactured at a low cost and makes possible simple and reliable handling, even for patients. The belt material (1) has at least one material area (2) with a lower spring rate in the longitudinal extension than at least one material area (3) with a higher spring rate of the belt (1).

A blade tensioner includes a blade shoe assembly with parallel stacked flat springs that pivots at one end and is supported in series by a spring loaded ramp at the opposite end. Providing a spring loaded ramp in series reduces the overall stiffness of the tensioner which enables a more uniform tensioning load as the tensioner takes up chain slack due to elongation from wear.

A method for producing a tubular spring (12) in the form of a cylindrical hollow body, especially for pre-tensioning a piezoelectric actuator element (2) of an actuator unit (1) of a fuel injector comprises the step of providing a thin-walled, solid-drawn steel tube with a plurality of regularly arranged longish recesses (14) by means of laser cutting. Thus, an actuator unit (1) comprises a piezoelectric actuator element (2) which is arranged in a thin-walled cylindrical hollow body, wherein the hollow body being elastically embodied and pre-tensioning the actuator element (2). Furthermore, the hollow body is a solid-drawn steel tube which is provided with a plurality of longish recesses (14).

The invention discloses a coating with protection and color alteration functions. The coating is prepared from the following components in parts by weight: 150-200 parts of thermoplastic butadiene styrene rubber A, 50-100 parts of thermoplastic butadiene styrene rubber B, 300-400 parts of sec-butyl acetate, 300-400 parts of 120# solvent naphtha, 300-400 parts of xylene, 30-50 parts of C9 petroleum resin, 5-10 parts of antioxidant, 5-10 parts of ultraviolet light absorber, 3-10 parts of light stabilizer, 12-25 parts of fumed silica, 3-6 parts of defoaming agent and 0 or 15-32 parts of pigment. Compared with a chloroprene rubber strippable coating, the coating with protection and color alteration functions, disclosed by the invention, belongs to an environment-friendly coating and is greatly improved on the aspects of elasticity and toughness such as tensile strength, stretching strength, resilience coefficient, surface hardness, adhesive force and the like.

Apparatus and method for extending the life of a booster valve in an automatic transmission. The booster valve commonly resides in the pump stator body and is modulated by reverse oil pressure and pressure control solenoid pressure signals. Pressure signals from the reverse oil pressure and the pressure control solenoid force a booster valve piston towards a pressure regulator valve piston also generally residing in the pump stator body. The booster valve piston slides inside a booster valve sleeve, and over time, the booster valve sleeve wears and the performance of the booster valve degrades or fails. The present invention replaces an original inner booster valve spring with a longer (or in some cases shorter) replacement booster valve spring to shift the operating range of the booster valve piston to an unworn portion of the booster valve sleeve to extend the life of the booster valve.

The invention provides a preparation method of a high-resilience biodegradable polyester foamed profiled bar, which comprises the following steps of: S1, mixing PBAT resin, a nucleating agent and a chain extender, and carrying out extrusion granulation to obtain a PBAT modified material, the chain extender being one or more of a trifunctional epoxy compound and a tetrafunctional epoxy compound; S2, preparing the PBAT modified material into a PBAT plate, and then performing high-pressure fluid saturation and rapid pressure relief foaming to obtain a PBAT foamed plate; and S3, carrying out heat treatment on the PBAT foamed plate through a mold to obtain the PBAT foamed profiled bar. The preparation method disclosed by the invention is simple in process, can be used for preparing a biodegradable high-performance foamed profiled bar material with a complex shape, and can be applied to the fields of sports protection, foamed shoe materials, cushion packaging and the like.

The invention discloses an airbag type inner framework from traveler and a primary tunnel supporting shotcrete construction method. The form traveler comprises a movable supporting framed bent, an inflatable formwork located on the outer side of the movable supporting framed bent, and a retractable supporting device for supporting the inflatable formwork, and the retractable supporting device is installed on the movable supporting framed bent and located on the inner side of the inflatable formwork. The construction method includes the steps: firstly, forwarding the airbag type inner framework from traveler in place; secondly, performing primary tunnel supporting shotcrete construction; thirdly, performing primary tunnel supporting shotcrete construction on a next tunnel section; fourthly, repeating the third step for multiple times till the primary tunnel supporting shotcrete construction process of all the tunnel sections is finished. The airbag type inner framework from traveler is reasonable in design, simple to construct and good in using effect, resilience rate of primary tunnel supporting shotcrete is effectively controlled through an airbag type inner framework, construction efficiency is high, construction period is short, construction quality is high, and zero resilience rate of primary tunnel supporting shotcrete can be realized.

The invention relates to a three-eccentric and bidirectional metal sealing butterfly valve. A flow passage is arranged in a valve body, a valve seat is sealed and fixedly arranged on the inner wall of the flow passage, a valve rod is vertically arranged and penetrates through the flow passage, the upper end of the valve rod and the valve body are sealed and connected by a first rotary type sealing and connecting structure, the lower end of the valve rod and the valve body are sealed and connected by a second rotary type sealing and connecting structure, a valve plate is arranged in the flow passage and is fixedly arranged on the valve rod, a mounting step is arranged at the periphery of the valve plate, a sealing ring is arranged on the mounting step and is pressed and fixed by a sealing ring press ring, the sealing ring press ring is fixedly connected with the valve plate by a first screw, and the sealing ring is in fit with the valve seat, so as to control the opening or closing of the valve. The three-eccentric and bidirectional metal sealing butterfly valve is characterized in that virtual gaps are respectively arranged between the inside surface of the sealing ring and the mounting step surface as well as between the outside surface of the sealing ring and the pressing surface of the sealing ring press ring, and sealing ring sealing gaskets are arranged in the virtual gaps. The three-eccentric and bidirectional metal sealing butterfly valve has the advantages that the structure design is novel, the requirement of stricter working condition is well met, the whole cost is reduced, and the service life of the valve is prolonged.

The invention belongs to the technical field of functional non-woven fabric processing and discloses multifunctional graphene superfine fiber multilayer non-woven fabric and a preparation method thereof. Multifunctional graphene superfine fibers and low-melting-point fibers are opened by a variable-frequency card clothing opener, then sent to a wind power mixer for secondary wind mixing and opening, sent to different cotton boxes, and sent to a zero-wind-pressure cotton web collecting device according to the arrangement mode that the middle layer is the low-melting-point fibers and the upper layer and the lower layer are the multifunctional graphene superfine fibers, so that the fibers uniformly fall onto a collecting row; and the collected fibers are physically rolled and pre-bonded to form a fiber web, and then the fiber web is sent to a thermal bonding machine for shaping to obtain the multifunctional graphene superfine fiber multi-layer non-woven fabric. The multilayer non-woven fabric with a three-dimensional web structure can be obtained by using simple methods of wind mixing and opening, zero-wind-pressure cotton web collection, physical rolling and heat shaping. The multilayer non-woven fabric obtained has the characteristics of being light, soft, warm and sticking.

A process for preparing high-activity bimetal cyanide as complexing catalyst from zinc chloride features that as said zinc chloride has higher basicity, it is treated by acid to regulate its basicity to optimal value and then is used to prepare said catalyst with higher activity, resulting in high quality of catalyzed product.

The invention provides a multilayer condom containing a modified polyurethane raw material and a preparation method of the multilayer condom. The preparation method of the condom comprises the following steps: (1) preparation of an inner-layer adhesive film: reacting polyisocyanate with a chain extender to obtain a fluorine-containing and silicon-containing polyurethane emulsion, and then forminga film to prepare the inner-layer adhesive film; (2) preparation of an intermediate layer adhesive film: blending polyisoprene rubber and a modified polyurethane emulsion to prepare the intermediate layer adhesive film; (3) preparation of an outer adhesive film: preparing rosin modified resin latex from maleated rosin through emulsion polymerization, and then blending the rosin modified resin latex with modified polyurethane emulsion and polyisoprene rubber emulsion to form a film; and (4) hemming, demolding and forming to obtain a finished product. The multilayer condom has the advantages ofno special smell, no anaphylactic reaction, high tensile strength, high elongation at break, good toughness, high resilience, good bacteriostasis effect on a plurality of common bacteria, efficient barrier performance on small molecules, good processing and production, and good application prospect.

The invention relates to modified ultrafine glass fiber cotton with high specific surface area for an AGM partition and a preparation method thereof, belonging to the technical field of functional composite materials. The modified ultra-fine glass fiber cotton is prepared from 85-94wt% of ultra-fine glass fiber cotton, 5 to 12wt% of nano-scale silica powder and 0.5 to 5wt% of processing aids according to mass percentage. The invention also relates to a preparation method of the modified ultrafine glass fiber cotton, the modified ultrafine glass fiber cotton is obtained by compounding the ultrafine glass fiber with the nano-scale silica powder and the processing aids and then drying the modified ultrafine glass fiber cotton. The prepared modified ultrafine fiberglass cotton can be used for preparing the AGM partition with excellent uniformity, tensile strength, resilience, oxygen recombination efficiency and high acid absorption.

The invention relates to the technical field of latex foamed products, in particular to a method for producing a latex foamed product by using low-protein latex. The natural latex foamed product is prepared from the following raw materials in parts by weight: 100 parts of latex, 2-5 parts of a vulcanizing agent, 0.5-6 parts of a foaming agent, 1-5 parts of a foam stabilizer, 0.5-1.5 parts of a gelatinizing agent, 3-5 parts of an active agent, 3-12 parts of an auxiliary agent and 1-15 parts of a filler. The natural latex in the preparation raw materials of the natural latex foamed product provided by the invention is low-protein natural latex, and has the characteristics of nature, environmental protection, no pollution, no toxicity, antianaphylaxis and the like. Proper amounts of the foamstabilizer and the active agent are added in the production and preparation process of the latex foamed product; meanwhile, the production process parameters are changed, so that the prepared latex foamed product has good foam stability, uniform foam pore size, regular and stable pore structure, few internal defects and the like, the prepared foamed product has good resilience, and the tensile strength, elongation at break, resilience rate and the like are remarkably improved.

The invention relates to the technical field of packaging materials, in particular to a silica gel packaging part for a new energy battery and a preparation method of the silica gel packaging part. The silica gel packaging part comprises a silicone rubber layer and a glass fiber cloth layer covering the outer surface of the silicone rubber layer, wherein the silicone rubber layer comprises raw materials in parts by weight as follows: 100 parts of composite silicone rubber, 25-35 parts of a reinforcing agent, 2-6 parts of hydroxyl-terminated polydimethylsiloxane, 5-15 parts of dimethicone, 75-85 parts of a compound synergist, 0.1-0.5 parts of an amino coupling agent, 0.1-0.5 parts of zinc stearate and 1-5 parts of a vulcanizing agent. With the adoption of the silicone rubber and glass fibers, insulativity, heat resistance, heat insulation property, flame retardance and corrosion resistance of the packaging part can be improved, when meeting flame combustion, the silica gel packaging part can absorb a large amount of heat and can also stop flame from passing, insulate air and reduce the fire spreading or affecting range, and protection for the battery is improved.

The invention provides a production method for integrally forming shoes, which comprises the following steps of putting an outsole part at the bottom of a shoe mold, adding thermoplastic elastomer particles into the midsole of the mold, putting a shoe tree sleeved with a vamp into the mold, and closing the mold to realize sealing, wherein at the position close to the thermoplastic elastomer particles, the surface of the outsole part and the surface of the vamp are both covered with a permeation blocking material; hot melt adhesive films are placed at the interface of the outsole part and the midsole position and the interface of the midsole position and the vamp; and the Vicat softening point temperature of the thermoplastic elastomer particles is 50-140 DEG C. introducing gas into the sealed shoe mold, raising the temperature to enable the gas reaching the supercritical state to impregnate and saturate the thermoplastic elastomer particles, then releasing the pressure to form a foamedmidsole part, and meanwhile, realizing bonding of all shoe parts, and removing a shoe tree to obtain the whole shoe. The method is short in preparation process and high in efficiency; and the prepared shoes are high in resilience rate, low in density and beneficial to application.

The invention relates to a hydraulic vehicle brake system with slip control. The invention proposes that wheel brakes at wheels of a front axle are of self-amplifying design in order to provide boosting of the brake force. An otherwise conventional vacuum brake force booster can be dispensed with. The invention further relates to a method for operating a hydraulic vehicle brake system, according to which, at high lining friction values, brake fluid is conducted, in a manner controlled by a valve, into a hydraulic reservoir.

The invention relates to the technical field of silicone rubber, in particular to high-resilience silicone rubber and a preparation method thereof. The high-resilience silicone rubber comprises raw materials in parts by weight as follows: 90-100 parts of composite silicone rubber, 35-45 parts of a reinforcing agent, 1.5-2.5 parts of hydroxy-terminated polydimethylsiloxane, 0.15-0.25 parts of a silane coupling agent, 5-8 parts of magnesium oxide, 0.1-0.15 parts of a release agent, 0.6-1.0 part of a vulcanizing agent and 0.1-1.0 part of distilled water. By means of the materials such as the reinforcing agent, hydroxy-terminated polydimethylsiloxane, the silane coupling agent and the like, the prepared silicone rubber has high resilience rate and excellent resilience, further has the properties of better tensile strength, elongation at break, tear strength and the like, is high in mechanical strength and stability and has wide application range.