9 results about "Shear bond" patented technology

The present invention discloses a device and method for measuring the shear bond strength of a high-temperature and high-pressure cementing interface, and belongs to the field of oil and gas well cementing. The device includes a kettle body, an oil storage tank, a hydraulic pump, an electronic control system, a display, a support frame and a base. The kettle body includes a top cover, an upper kettle, a lower kettle, a bottom cover, a simulated casing, a simulated formation, a positioning steel cylinder, a piston cylinder, an inner piston, an outer piston and a floating support plate. The method includes: pouring cement slurry into the annular space between the simulated casing and the simulated formation; curing the cement slurry at a constant temperature and pressure; slowly increasing the pressure in the piston cavity, and moving the inner piston downward until the simulated casing is separated from the cement ring; continuing to increase the pressure in the piston cavity, and the outer piston moves downward under the push of the inner piston until the cement ring is separated from the simulated formation. The test process of the present invention is controllable, and the test results are consistent with the downhole environment, providing an important technical means for optimizing cement slurry performance and cementing process parameters, and further improving the cementing quality of oil and gas wells.

Provided is a steel pipe joint device. The steel pipe joint device disclosed herein comprises: a first joint pipe coupled to one end of a steel pipe; a second joint pipe inserted into and coupled to the first joint pipe; a shear key for connecting the first joint pipe and the second joint pipe; a first fixing part for fixing the shear key to the first joint pipe; and a second fixing part for fixing the shear key to the second joint pipe.

Provided is a pressure-sensitive adhesive sheet which has excellent impact resistance, is less apt to leave an adhesive residue, and brings about excellent reworkability.　A pressure-sensitive adhesive sheet 1 includes a pressure-sensitive adhesive layer 2 which is a rubber-based pressure-sensitive adhesive layer. When the pressure-sensitive adhesive surface (adhesive surface (X)) of the pressure-sensitive adhesive layer 2 is applied to a stainless-steel plate, and this pressure-sensitive adhesive layer 2 is allowed to stand for 30 minutes in an environment of 23°C and 50% RH and then examined for 180° peeling adhesive force at a pulling speed of 300 mm / min, the peeling adhesive force is 5.5 N / cm or greater. When the pressure-sensitive adhesive surface (X) of the pressure-sensitive adhesive layer 2 is applied to a stainless-steel plate, and this pressure-sensitive adhesive layer 2 is allowed to stand for 24 hours in an environment of 23°C and 50% RH and then examined for dynamic shear bond force under the conditions of a pulling speed of 10 mm / min and a peel angle of 0°, the dynamic shear bond force is 0.35 MPa or greater. When the pressure-sensitive adhesive surface (X) of the pressure-sensitive adhesive layer 2 is applied to a stainless-steel plate, and this pressure-sensitive adhesive layer 2 is allowed to stand for 30 minutes in an environment of 23°C and 50% RH and then examined for 180° peeling adhesive force at a pulling speed of 300 mm / min after supplying 0.5 mL of ethanol to the adhesion interface, then the adhesive force is 2.0 N / cm or less.

The utility model discloses a dental after tooth bonding's shearing adhesive strength testing arrangement belongs to involve material testing technical field, including support board, the support board is fixedly connected with mounting panel, the outside fixed connection of electric push rod has electric push rod, the piston rod end fixed connection of electric push rod has vertical board, the outside mounting of vertical board has thrust sensor, in the shearing force test process, still can rotate through the first twist seat that torque test motor drives to carry out, and the first twist seat will drive the tooth that contacts the contact board to rotate under the condition of rotating, and all carry out slight rotation deviation in each rotation process, simulate the slight deviation phenomenon that will appear in human body occlusion process, further increase the diversity of strength test, increase data result to make the test result more in line with the use environment in human body use process.

A prosthesis including a UHMWPE core and a coating, wherein the core is a cup-shaped core having a concave first side and a convex second side, wherein the UHMWPE has a weight average molecular weight that is from 2×106 to 3×106 grams per mole. The core has a tensile strength that is from 35 to 50 MPa. The coating layer coats the second side of the core. The coating includes titanium powder having a D50 particle size of from 200 to 250 microns. The coating has a mean thickness that is from 200 to 500 microns. The prosthesis is an acetabular cup prosthesis. When tested for abrasion resistance, the coating loses less than 65 milligrams when abraded for 100 cycles. The coating has a static shear bond strength that is from 15 to 25 MPa and a static tensile bond strength that is from 14 to 25 MPa.

Provided is a method for producing an electrode with which it is possible to obtain a composite material sheet having good stretchability. The method for manufacturing an electrode (10) is characterized by comprising: a composite material sheet manufacturing step for manufacturing a composite material sheet (12) by forming a powder (20) of an electrode composite material containing an active material and a fibrous binder and having a solid content concentration of substantially 100% into a sheet; and a bonding step in which the composite material sheet (12) is bonded to the surface of the core material (11), the binder having, as the main component, polytetrafluoroethylene having a shear bond stress of 40 kPa or less.

A prosthesis including a UHMWPE core and a coating, wherein the core is a cup-shaped core having a concave first side and a convex second side, wherein the UHMWPE has a weight average molecular weight that is from 2x106 to 3x106 grams per mole. The core has a tensile strength that is from 35 to 50 MPa. The coating layer coats the second side of the core. The coating includes titanium powder having a D50 particle size of from 200 to 250 microns. The coating has a mean thickness that is from 200 to 500 microns. The prosthesis is an acetabular cup prosthesis. When tested for abrasion resistance, the coating loses less than 65 milligrams when abraded for 100 cycles. The coating has a static shear bond strength that is from 15 to 25 MPa and a static tensile bond strength that is from 14 to 25 MPa.

The utility model provides a composite assembly type bridge expansion joint device, which relates to the technical field of bridge expansion joint devices and comprises an upper plate and a lower plate, the upper plate is arranged at the top of the lower plate, a shear key is arranged between the upper plate and the lower plate, and the upper plate, the lower plate and the shear key form assembly type section steel. The opposite faces of the upper plate and the lower plate are each provided with a cavity, a special-shaped anchor bolt is inserted into one side of the upper plate and one side of the lower plate in a penetrating mode, the cavity of the upper plate and the cavity of the lower plate are combined to form a circular cavity, and water stop belt side edge lug belts are arranged in the two cavities. When the assembly type profile steel is used, the polished rod end of the special-shaped anchor bolt and the embedded steel bar are welded together, then the pressing filler is poured, and then the lower plate and the upper plate sequentially penetrate through the special-shaped anchor bolt, so that when the profile steel needs to be replaced, the lower plate and the upper plate are fixed through the water stop belt side edge lug belts. And the damaged place can be replaced.

The invention is applicable to the field of biomedical materials, and provides a dental material based on chemically modified polyether ketone ketone as well as a preparation method and application thereof, and the preparation method of the dental material comprises the following steps: sequentially sulfonating polyether ketone ketone materials to obtain sulfonated polyether ketone ketone materials; carrying out chemical modification treatment of one or more of amination, hydroxylation and carboxylation on the sulfonated polyether ketone ketone material to obtain a chemically modified polyether ketone ketone material; and filling the surface of the chemically modified polyetherketoneketone material with dental resin to obtain the dental material. Amino, hydroxyl or carboxyl is grafted to the surface of the polyetherketoneketone material through a chemical method, the shear bonding strength between the polyetherketoneketone and dental resin can be remarkably improved, and the hydrophilicity of the material is improved.