69 results about "Shear bond" patented technology

A molded structural bicycle component design, such as wheels and frames, which may incorporate complementary halves and at least one shear bond to allow efficient manufacturing and assembly. The molded design which may be applied in a host of different applications, including a bicycle frame and wheel, where demanding loads exist in normal use. Details of the joint and its design are provided. Integral bearings, foam tire adaptations, symmetrically opposite designs, and compression bonding techniques are described. Various cross sections may be made at different stress areas. A method of inserting a reinforcing tube in various high stress areas is also described. A host of bonding techniques including the use of electromagnetically active material are accommodated by the designs. The design may include the use of spacers in the vicinity where methods of retention of accessories or components require compressing from both sides such as the wheels, head tube, bottom bracket, and suspension attachment. The invention may include semicircular boundaries of a wheel assembly so as to define a valve stem hole after assembly.

An apparatus for determining shear bond strength of a cement to be set within a wellbore penetrating a subterranean formation consists of a housing, a vertical rod which extends from the uppermost portion of the housing through the lowermost portion of the housing, a base plate for positioning onto the bottom of the housing and for supporting the lowermost portion of the vertical rod, and a test plate for positioning onto the top of the housing through which the uppermost portion of the vertical rod extends. The apparatus may further contain a push rod. Shear bond strength is determined by introducing into the housing a sample core of the formation prior to introduction of a slurry containing the cement. The force required to break the bond between the vertical rod and the set cement may be used to determine the shear strength between the casing within the wellbore and the set cement when the cement is hardened within the wellbore. The force required to break the bond between the set cement and the sample core may be used to determine the shear strength between the set cement and formation core when the cement is hardened within the wellbore.

The present invention provides improved methods of cementing and cement compositions. A cement composition of the invention comprises hydraulic cement, silica hydrophobicized with a mixture of organosilicon compounds and water which upon hardening has high shear bond strength.

A dental restorative composition comprising: (A) polymerizable monomer(s) having at least one phosphorus-containing acidic moiety and at least one ethylenically unsaturated group; (B) polymerizable monomer(s) having a molecular weight of 100-250, at least one hydroxyl group, and at least one ethylenically unsaturated group; (C) polymerizable monomer(s) having a molecular weight of 270-900, at least two ethylenically unsaturated groups and no acidic functional group; (D) photo-initiator(s); and (E) filler(s) each having a mean particle size of more than 0.005 microns and less than 70 microns. The weight ratio of (A+B):(C) ranges from 30:70 to 90:10, the concentration of (A) is 10-50 wt. %, the concentration of (B) is 15-60 wt. %, and the composition has a shear bond strength of at least 10 MPa to both dentin and enamel. Also provided is a method for filling a dental cavity with the composition without first treating the dental cavity with an etchant, a primer and / or an adhesive.

A rotating electric machine includes: a stator including a stator core, slots provided in the stator core at equal intervals along the circumferential direction, and coils placed in the stator slots and configured to generate a rotating magnetic field; and a rotor rotatably provided with a predetermined rotation gap between the stator core and the rotor, wherein the rotating electric machine further comprising a first varnish applied between the slots in the stator core and the coils for impregnation, and a second varnish applied directly onto enamel coating of the coils outside of the slots in the axial direction, the first varnish is a thermosetting varnish having a shear bond strength of a flat wire between the coils and the varnish is higher than that of the second varnish, and the second varnish is a thermosetting varnish having a glass transition temperature of approximately 104° C. or lower and the glass transition temperature of the second varnish by the DMA method is lower than that of the first varnish.

A modular wall block is adapted for being assembled together with a number of like blocks in stacked courses to form a retaining wall. The wall block includes a front face and rear, top and bottom, and opposing sides. A locking shear key extends outwardly from either of the top or bottom of the wall block, and is adapted for residing between respective adjacent sides of like blocks in an adjacent upper or lower course to anchor the wall block in position. A severable area is formed with the shear key for being removed to accommodate placement and orientation of the wall block between respective adjacent sides of like blocks in an adjacent upper or lower course.

Disclosed is a lightweight tire shuttering member for concrete filling comprising a tire body (1), characterized in that at least one lateral surface (2) of the tire body (1) is provided with at least a groove (3), the wall of the groove (3) is made of lightweight material. When applied to floor slab structures, the tire bodies an be arranged closely, the groove can form apertures for cast-in-situ concrete casting, after the cast-in-situ concrete enters the aperture, reinforced bar concrete shearing bond type hollow building slabs can be constructed, thereby improving the shearing- and torsion-resisting mechanic property of the building slabs. the invention can be applied to various cast-in-situ concrete building (housing) slabs, walls and road bridge structures, especially for hollow flat slabs.

The present invention provides a cyanoacrylate adhesive composition having high shear bond strength, peeling bond strength, tensile strength and impact bond strength and superior wear characteristics particularly in toy applications where hostile play environments demand hot-cold cycle resistance. The cyanoacrylate adhesive composition contains (a) up to 20% by weight of a cyanoacrylate monomer, (b) a styrene-based elastomeric block copolymer, and (c) a specific solvent which is selected to effect the solution of both components. The invention is also directed to a method of applying the instant adhesives to substrate surfaces.

The present invention provides a non-slip material and a temporary fixing material which do not break even after repeated use and which can continuously exhibit adhesiveness and detachability at a high level. This non-slip material contains a foam having a continuous bubble structure having through holes between adjacent spherical bubbles, wherein the average diameter of the spherical bubbles is less than 20 mum, the average diameter of the through holes is 5 mum or less, surface openings having an average diameter of 20 mum or less are formed on the surface, and the normal shear bond force is 1 N / cm2 or greater.

The invention discloses a permanent formwork, which comprises an ultra-high performance concrete layer. The ultra-high performance concrete layer comprises a bottom plate and side plates arranged on the bottom plate. Grooves are uniformly distributed on the inner surface of the ultra-high performance concrete layer. In addition, the invention discloses a reinforced concrete beam structure composedof the permanent formwork and a manufacturing method. The permanent formwork works together with post-poured ordinary concrete, and good force performance is achieved. Because there are shear bonds distributed between the ultra-high performance concrete layer and the post-poured ordinary concrete, the bonding between the two materials is increased, and the shear capacity of the beam is greatly improved.

The invention relates to a method for predicting paper tensile strength based on mechanical pulp fiber properties and belongs to the technical field of pulping and papermaking. On the basis of a classic page model, the water retention value WRV of pulp is used for replacing the fiber relative bonded area RBA which is hard to test, and a mathematical model suitable for evaluating the relation between the mechanical pulp fiber properties and the paper tensile strength is established. Specifically, mechanical pulp fibers are used as samples, and mechanical pulp plates made of different varieties of trees (polar and maple) are subjected to defibering and PFI pulping; assuming that the model contains the paper tensile index T, the fiber length weighted lw, the fiber curling index, the shear bond strength b between the fibers and the water retention value WRV of the pulp, the expression of a paper tensile strength model is shown in the description, wherein a is constant. The method is completely based on the morphological parameters of the mechanical pulp fibers, and efficient prediction of the paper tensile strength can be realized by testing the fiber morphological parameters.

This invention provides one method to test fiber shear combination intensity, which comprises the following steps: a, under certain humidity pressure or slurry intensity to test fiber shape parameter k; b, measuring paper zero distance stretching intensity Z and T and light diffusion parameter S; c, computing train combination intensity index; d, drawing train combination index of PBSI and light diffusion parameters relation pattern; e, computing shear combination intensity of b value by relation pattern. This invention combines light diffusion parameter test technique for one simple measurement of single fiber shear combination intensity.

Provided is a composite nanometal paste which, when a layer of the paste interposed between upper and lower bodies is sintered in an inert gas under no load until the layer turns to a metal layer, attains a shear bond strength between the upper and lower bodies of 10 MPa or higher.The composite nanometal paste contains, as metallic components, composite metallic nanoparticles comprising metal cores with an average particle diameter of X (nm) and an organic coating layer formed around the circumference, metallic nanofiller particles having an average particle diameter of d (nm), and metallic filler particles having an average particle diameter of D (nm), and satisfies the first relation X<d<D and the second relation X<d<100 (nm). Furthermore, this is a composite nanometal paste in which said average particle diameter d has a size such that said metal nanofiller particle can be embedded into a three pocket formed when said three said metal filler particles are placed on a plane so as to be mutually in contact, and said average particle diameter X has a size such that the gaps that remain within said three pocket are filled.

The present invention discloses a novel underground spray coating material and a preparation method thereof, and belongs to the technical field of mine protection engineering. According to the present invention, a polymer cement base slurry comprises an additive, cement and water, wherein a ratio of the additive and the cement to the water is 1:1, and the additive comprises the following components, by weight, 50-65% of 425 cement, 15-23% of an acrylic acid powder material, 5-8% of gypsum powder, 3-6% of calcium carbonate, 2-4% of a high strength water reducing agent, 4-7% of an accelerated agent, and 1-2% of antifoaming agent. The preparation spray coating method comprises material preparing, stirring, spray coating and the like. According to the present invention, in the case of the same viscosity of the cement slurry, a spraying performance of the polymer cement base slurry is significantly improved; a bonding performance of the material and the surrounding rock is substantially improved; and compared to the ordinary cement slurry, a tensile bond strength of the cement base slurry is increased by about 100-300%, and a 14 d shear bond strength can be increased by 100-140%.

The purpose of the present invention is to provide a sealant for a display element, having high shear bond strength with respect to adherends, allowing outgas production to be minimized, and affording excellent transparency to cured articles. The present invention is a sealant for a display element, containing a polythiol compound having two or more thiol groups per one molecule, a polyene compound having two or more carbon-carbon double bonds per one molecule, and a photopolymerization initiator, the storage elastic modulus of cured articles thereof at 80 DEG C being 70-1,000 MPa.

A light filler module for in-situ casting the hollow concrete floor, roof, wall and foundation is a corrugated cavity composed of top plate and side plates. The connecting tubes are connected between the side walls of two adjacent filler modules to form the ribs and shear bonds in the in-situ cast hollow slab. Its advantages are high strength, simple structure and low cost.

A shear bonding device and a shear bonding method of metal plates are disclosed. The shear bonding device may include: an upper shear bonding mold having more than one upper perpendicular tooth and more than one upper slanted tooth formed alternately on a front end surface thereof; a lower shear bonding mold overlapped with the upper shear bonding mold in a vertical direction by a predetermined width below the upper shear bonding mold, and having more than one lower perpendicular tooth corresponding to the more than one upper slanted tooth and the more than one upper perpendicular tooth corresponding to the more than one lower slanted tooth formed alternately on a front end surface confronting the upper shear bonding mold; an upper heating clamper including a front end surface contacting with the upper perpendicular tooth of the upper shear bonding mold and adapted to generate heat by receiving power from a power supply; a lower heating clamper including a front end surface contacting with the lower perpendicular tooth of the lower shear bonding mold and adapted to generate heat by receiving power from the power supply; upper and lower pressing cylinders moving the upper and lower shear bonding molds upwardly or downwardly so as to apply load; and upper and lower clamping cylinders moving the upper and lower heating clampers upwardly or downwardly so as to apply clamping force and load, wherein the metal plates are disposed between the upper shear bonding mold and heating clamper, and the lower shear bonding mold and heating clamper.

An apparatus for determining shear bond strength of a cement to be set within a wellbore penetrating a subterranean formation consists of a housing, a vertical rod which extends from the uppermost portion of the housing through the lowermost portion of the housing, a base plate for positioning onto the bottom of the housing and for supporting the lowermost portion of the vertical rod, and a test plate for positioning onto the top of the housing through which the uppermost portion of the vertical rod extends. The apparatus may further contain a push rod. Shear bond strength is determined by introducing into the housing a sample core of the formation prior to introduction of a slurry containing the cement. The force required to break the bond between the vertical rod and the set cement may be used to determine the shear strength between the casing within the wellbore and the set cement when the cement is hardened within the wellbore. The force required to break the bond between the set cement and the sample core may be used to determine the shear strength between the set cement and formation core when the cement is hardened within the wellbore.

The invention discloses a device and a method for testing shear bond strength of a structural adhesive between a reinforcement material and concrete. The device is characterized by comprising an upper rack arranged at the outer edge of an upper concrete block, and a lower rack arranged at the outer edge of a lower concrete block, wherein a V-shaped bump is arranged in the middle position of the bottom surface of the upper rack; a V-shaped groove is formed in the middle position of the top surface of the lower rack and matched with the V-shaped bump of the upper rack; and the V-shaped bump pivots a certain angle around a contact line inside the groove. The test method comprises the following concrete steps: placing the upper rack on the lower rack; placing the V-shaped bump into the V-shaped groove and fixing by using a locating strip; sticking the reinforcement material to the side of the block by using the structural adhesive, wherein the sticking area of the reinforcement material on two blocks is equal; dismantling all locating cover boards and all locating strips on one side of each concrete block after the structural adhesive is completely cured; and exerting pressure, so that the concrete blocks have the trend of pivoting around the contact line of the V-shaped bump, so as to generate shear binding power and work out the shear bond strength when the limit value is destroyed.

Polystyrene thermal insulation mortar with high waterproofness is characterized by comprising the following raw materials in parts by weight: 300 to 340 parts of cement, 20 to 25 parts of building crushed brick powder, 10 to 12 parts of ceramsite, 10 to 12 parts of polystyrene granule, 5 to 7 parts of sodium carboxymethyl cellulose, 10 to 12 parts of polyvinyl alcohol, 40 to 45 parts of shrimp shell meal, 4 to 6 parts of Laiyang soil powder, 4 to 8 parts of melamine, 10 to 12 parts of light calcium carbonate powder, 4 to 6 parts of modified nano-carbon powder, and 600 to 650 parts of water. According to the invention, as cement is taken as a cementing material, meerschaum and shrimp shell meal are taken as main materials, a small quantity of polystyrene granules are taken as a size expanding agent, and polyvinyl alcohol is added for improving the workability, the polystyrene thermal insulation mortar has the advantages that the density and the heat conductivity are low; the compressive strength and the compression and shear bond strength are high; the heat-insulating and energy saving effects are obvious.

The invention discloses preparation and application of an isotope label reagent for analyzing N-polysaccharides. N-polysaccharide is marked by virtue of the isotope label reagent containing MS / MS shearable bonds, reactive groups capable of being conjugated with N-polysaccharide as well as quaternary amine. Meanwhile, the invention discloses quaternary amine containing an isobaric label reagent. The isotope label reagent is characterized by containing the formula as follows: report group-balance group-reaction group; and the specific structure is as follows: formula (shown in the description),wherein at least one in the positions 1-3 contains an isotope atom, the report group and the balance group are linked through an MS / MS shear bond, and R represents a reactive group capable of being conjugated with polysaccharide. Meanwhile, the invention discloses a method for synthesizing and preparing the isotope label reagent containing quaternary amine.

The invention discloses glass bead thermal mortar with high pressure resistance. A layer of molten furan resin covers the surface of a glass bead, and a macromolecule resin layer with reinforcing and hydrophobic properties is formed, so that surface defects of the glass bead caused by various reasons can be closed, the glass bead can be prevented from adsorbing and absorbing water, and the water absorption rate is reduced; and meanwhile, the glass bead is coated with a layer of modified waste rubber particles and then coated with other active additives, so that breaking rate of the glass bead caused by pressure and collision when the glass bead is doped can be remarkably reduced, the excellent performance of the glass bead can be improved, and the prepared thermal mortar is high in thermal heat insulation efficiency and high in pressure resistance and pressure-shear bond strength.

The invention discloses a post-grouting pressure type anchor rod which comprises a pull rod (1). The tail end of the pull rod (1) is provided with a threaded joint which penetrates through a pull rod hole in a bearing plate (3) and is fixed through a threaded casing pipe (4). The lower portion of the pull rod (1) is provided with a grouting body (2). The post-grouting pressure type anchor rod has the advantages that due to the fact that a post-grouting body has the functions of permeating, separating, filling, compacting and solidifying the bottom end and the side wall of the grouting body, the compressive strength of the bottom end of the grouting body is improved; due to the fact that the post-grouting body is made of macromolecule material polymer concrete (mortar) which is high in strength and binding force and resistant to water permeating, the problem that the bearing force of the bottom end of the grouting body is insufficient is solved; due to the fact that the shearing bond stress between the macromolecule material polymer concrete (mortar) and a peripheral soil (rock) layer is larger than that of a common grouting material, under the same design bearing force condition, the length of the anchor rod is reduced, and construction cost is reduced.

The invention belongs to the technical field of civil engineering assembly, and particularly relates to a PPVC modular building structure system and an assembly method thereof. According to the structure system, integral anti-seismic property of a structure is taken into account, and through arrangement of a shear key A and a shear key B, tensile property and shear resistance among modules are improved; and steel bonding treatment is carried out on wallboards around a stand column and the shear keys B, so that tensile property and bending resistance of the structure are further improved. Due to the fact that a lower floor slab adopts a structure that a prefabricated slab meshes with a cast-in-place slab tooth-shaped structure, overall stability of the lower floor slab is improved; meanwhile, compared with the mode that the whole lower floor slab is cast in place in the prior art, influence of site construction on an environment is reduced, the overall assembly efficiency of the structure system is improved, and the construction period is shortened; and compared with the condition that the whole lower floor slab is prefabricated in the prior art, the cost is reduced, and the integrity of the whole lower floor slab becomes better through adopting an occlusion form of the tooth-shaped structure.

The invention discloses a lightweight composite wall board and a production method thereof. The lightweight composite wall board is characterized by being prepared from the following raw materials in parts by weight: 140-150 parts of SG-3 polyvinyl chloride, 15-20 parts of nylon PA66, 30-35 parts of straw powder, 27-30 parts of quartz sand, 3-4 parts of ethylene foamed particles, 4-5 parts of glass fiber, 3-4 parts of sodium metasilicate, 12-16 parts of modified loess powder, 2-3 parts of used oil, 2-3 parts of sodium tripolyphosphate, 1-2 parts of an ortho-hydroxybenzoic acid, and 3-4 parts of dichlorodifluoromethane. The lightweight composite wall board disclosed by the invention has a high mechanical strength, the tensile strength is at least 0.4 MPA, and the pressure-shear bond strength is at least 0.1 MPA; the lightweight composite wall board is good in sound insulation and weather resistance, strong in wind / negative pressure resistance, capable of being hung by nails, impact-resistant, fireproof, good in bearing capacity, and long in service life.

The invention discloses thermal insulation mortar and a preparation method thereof. The thermal insulation mortar comprises the following ingredients by weight per ton: 600kg of silicate cement, 80kg of silica micropowder, 50kg of coal ash, 5kg of polypropylene fiber, 15kg of waterproof agent, 5kg of wood fiber, 50kg of thermal conductive powder,15kg of polymer powder, 10kg of hydroxypropyl methyl cellulose and 170kg of hollow vitrified beads. The thermal insulation mortar has the advantages of excellent thermal insulation effect and high pressure resistance and pressure-shear bond strength.

The invention discloses a refractory clay mortar shear bond strength detection method. The method comprises the following steps: preparing refractory bricks; preparing refractory clay mortar; positioning a testing test-piece; constructing the testing test-piece; drying; measuring the area of bond areas; performing shear load pressure testing; calculating the shear bond strength. According to the method, a special-made clamp is used for positioning and forming, so that the thickness of each clay mortar seam and the parallelism between the upper end and the lower end can be accurately controlled, the lower end surfaces of a left refractory brick and a right refractory brick are in the same plane, the normalization during test-piece bonding is ensured, and the sample preparation is simple and convenient; the refractory bricks do not need cutting, or only need simple processing, the bonding manner is consistent with that in a field during construction, the thickness of a refractory clay mortar layer is accurately controlled, and the detection result is high in accuracy, and has instructive significance.

The invention discloses a modified geopolymer bonding agent and application method for rapidly renovating an old ceramic tile wall surface thereof, wherein the bonding agent comprises a geopolymer slurry and an emulsion, wherein the geopolymer slurry comprises superfine slag powders, fly ashes, silica fumes, metakaolin, fine sands, admixtures and water; the emulsion comprises water glass, an emulsion and an antimildew agent. The two component slurries are respectively stirred well and then the two component slurries are mixed well to obtain the modified polymer bonding agent for rapidly renovating the old ceramic tile wall surface, and the modified polymer bonding agent can be used for treating the interface of the old ceramic tile wall surface by matching with a corresponding constructionprocess. The modified geopolymer bonding agent has good shear bond strength and tensile adhesive strength, also has good corrosion resistance, and extremely strong durability under various atrociousweather environments. The modified geopolymer bonding agent can be directly used for ceramic tile surface treatment, and is suitable for quickly renovating the old ceramic tile wall surface.