55results about How to "Reduce abrasiveness" patented technology

Disclosed are coated multifilament dental devices overcoated with biofilm-responsive, imbedded, particulate abrasives.

Biofilm therapy interproximal devices coated with a sialagogue, a wax/sialagogue, a surfactant/sialagogue, or an emulsion/sialagogue. wherein said devices are suitable for: (c) controlling, disrupting and physically removing biofilms, while (d) increasing and prolonging saliva flow.

A dentifrice composition of the invention can be applied to teeth and/or gums by any conventional A dentifrice composition comprises (a) calcium carbonate having properties of particle size and angularity effective to provide mild abrasivity to dental enamel; (b) red iron oxide of low abrasivity in an effective amount on which to impart red color to the composition; and (c) a herbal component comprising at least one botanical or extract thereof, in a total herbal component amount effective to promote oral health.

Unique abrasive materials that are in situ generated compositions of precipitated silicas and silica gels are provided. Such compositions exhibit different beneficial, particularly simultaneously high pellicle film cleaning properties and moderate dentin abrasion levels. Such a result thus accords the user a dentifrice that effectively cleans tooth surfaces without detrimentally abrading such surfaces. Furthermore, the produced abrasive materials also exhibit very high and desirable brightness properties that permit easy incorporation and utilization within dentifrices for aesthetic purposes. Encompassed within this invention is a unique method for making such gel/precipitated silica composite materials for such a purpose, particularly under high shear conditions, as well as the different materials within the structure ranges described above and dentifrices comprising such.

A method of producing calcium carbonate from a waste sludge containing calcium carbonate and at least one silicate mineral. The method comprises the steps of:

• • (i) incinerating the sludge to an ash in which at least 60% of the calcium carbonate present in the sludge is converted to free calcium oxide which is unreacted with the silicate mineral(s),
  • (ii) optionally slaking the ash to convert at least a portion of the free calcium oxide therein to calcium hydroxide,
  • (iii) treating either the ash from step (i) or the slaked ash from step (ii) with an aqueous solution of a polyhydroxy compound to provide a solution of dissolved calcium hydroxide,
  • (iv) separating insoluble material from the solution of calcium ions obtained in step (iii),
  • (v) dispersing carbon dioxide through the solution obtained from step (iv) so as to produce calcium carbonate, and
  • (vi) separating the calcium carbonate produced in step (v).

A rotary tool, in particular drilling tool, extends along a longitudinal axis and has an end surface; a brad point; and at least one major cutting edge extending outward up to an edge corner. A first free surface segment adjoins the major cutting edge, and a second free surface segment in turn adjoins said first free surface segment. To keep the stress, in particular the wear, low in the region of the end surface, the first free surface segment has a lower average abrasiveness than the second free surface segment.

Coating composition comprising mineral pigment, for creating a matt or silk coated paper with decreased ink scuff tendency. The coating composition also comprises organic particles, which particles in an amount of 0.5-9.5 weight-% calculated on said mineral pigment, exhibit a particle size of more than 2 mum and at the most 50 mum. The invention also relates to a paper which is coated with said coating composition.

The present invention describes a method to obtain magnetic aqueous ink composition for MICR (Magnetic Ink Character Recognition) ink jet printing comprising an aqueous dispersion of functionalized magnetic nanoparticles, humectant agents, solvents, biocide and water. It also allows obtaining stable inks for long periods with extremely high concentrations of magnetic nanoparticles with loading between 15% and 40% by mass and magnetic signals varying from 80 to 200%. Through the use and special combination of humectant agents, the present inventions increase the print head protection, by decreasing abrasiveness and increasing fluidity. The resulting ink has superior printing quality and increased service life of the printing system.

The invention discloses a wear-resisting weak-abrasiveness bionic tool joint, which is characterized in that a plurality of pit unsmooth structure units which are regularly distributed are arranged on a bionic wear-resisting belt of the tool joint, each pit unsmooth structure unit is internally provided with a convex-hull-shaped unsmooth structure unit, the depth of the pit unsmooth structure unit is identical to the overall height of the convex-hull unsmooth structure unit, the aperture of each pit unsmooth structure unit is 0.001 to 0.1mm smaller than the diameter of the convex-hull unsmooth structure unit, the top of each pit unsmooth structure unit is in arc transition of a pit prismatic surface to be connected together with the low-friction-coefficient high-wear-resisting convex-hull unsmooth structure unit in an interference fit way to form a wear-resisting unsmooth structure surface, and the top surface of the combined convex-hull unsmooth structure unit is leveled to the surface of the tool joint. The wear-resisting weak-abrasiveness bionic tool joint has characteristics that the service life of a drill pipe is prolonged, the abrasion on a bushing is reduced, the anti-viscosity is strong, the wear resistance of the drill pipe is improved, and the like, and can effectively reduce the underground accident, improve the drilling quality and save the drilling cost.

The invention relates to the technical field of drilling in geological engineering, in particular to a drilling rod with an axial deep groove wear-resistant joint for well drilling. The drilling rod comprises a rod body, a male connector and a female connector are arranged at two ends of the rod body, and a plurality of connector unscrewing clamping grooves extending along the axial direction of the male connector and the female connector are distributed on the male connector and the female connector in the circumferential direction. A connector anti-abrasion flange is formed between every twoadjacent connector screwing and unscrewing clamping grooves and provided with wear-resistant materials or a plurality of convex spherical crown installation blind holes, the smooth wear-resistant convex spherical crowns are fixedly connected into the convex spherical crown installation blind holes, and the rod body, the male connector and the female connector are each of a through hollow structure. The drill rod can be continuously screwed or unscrewed without applying radial pressure in the tripping and drill rod screwing and unscrewing processes, no damage is caused to the surface of the connector, abrasion of the connector is only generated in a well and the wall of the well, and therefore the overall service life of the drill rod is prolonged, the probability of accidents such as drilling tools and jamming of the drill rod is reduced, and the safety of the drill rod is improved. Therefore, the working efficiency of drilling is improved and the drilling cost is saved.

The invention discloses a mixing material separation and dust-reduction device and application scenarios thereof. The device comprises a multi-channel bionic swirler and an ejector, wherein the multi-channel bionic swirler comprises an overflow tube, a swirl chamber, a shrinking hopper and a sample discharge tube, which are fixedly connected with each other from top to bottom; bionic non-smooth units are distributed on the inner wall surface of the multi-channel bionic swirler; an inlet channel is disposed at the upper end of a side wall of the swirl chamber; the ejector comprises a spray nozzle, a mixing chamber, a throat tube and a diffusion chamber; one end of the spray nozzle is connected with a high-pressure pump, and the other end of the spray nozzle stretches into the interior of the mixing chamber; the mixing chamber is connected with the overflow tube in a closing manner; two ends of the throat tube are respectively connected with the mixing chamber and the diffusion chamber in a closing manner; and the diffusion chamber is connected with a dust-reduction box through a pipeline. The device is mainly used in scenarios in which a large amount of dust is generated such as drilling, geotechnical engineering, grouting engineering, geological disaster control engineering, mining, tunnel piercing and the like, and is capable of solving the technical problems that the existingdevice is low in separation efficiency on mixing materials, unsatisfactory in dust-reduction effect, serious in abrasion, short in service life and the like.

Disclosed is a method for processing the cavity surface of a casting mold wherein the fluidity is good even if the shape of the cavity surface (casting product) is complicated, mold release performance is excellent, reprocessing is possible, and the life of the mold can be enhanced. A jet processing step (A) for forming hemi-spherical first dimples (12) in the cavity surface (11), and a jet processing step (B) for forming second dimples (13) more minute than the first dimples (12) are provided, a processing method (a) and a processing method (b) where either the jet processing step (A) or the jet processing step (B) is carried out preferentially, and a processing method (c) where only the first dimples (12) are formed by carrying out only the jet processing step (A) are provided.

The invention provides a planetary ball mill, and particularly relates to the technical field of smashing equipment. The planetary ball mill comprises a ball mill body, a rotary disc is arranged on the ball mill body, and a plurality of ball milling pots are arranged on the rotary disc. Each ball milling pot comprises a pot base and a pot body, wherein the pot base comprises a pot base bottom plate arranged on the rotary disc, the pot base bottom plate is of a circular ring structure with an opening formed in the top surface, pot side plates are oppositely arranged on the opening in the top surface of the pot base bottom plate, each pot side plate is of an arc plate structure, one end of each pot side plate is fixedly arranged on the opening in the top surface of the pot base bottom plate,the other end of each pot side plate is provided with a plate clamping notch, an external thread rod is vertically arranged on the pot base bottom plate, one end of the external thread rod penetratesthrough the pot base bottom plate, and a scraping rod is arranged on the side wall of one end of the external thread rod. The planetary ball mill has the advantages that the situation that the grinding effect is reduced as specimens accumulate at the bottom of the pot body can be prevented, and in the specimen scraping process, pressure between scrapers and the inner wall of the pot body can be automatically adjusted, so that damage to the inner wall of the pot body is reduced.

A hard carbon film that forms a sliding surface of a sliding member, wherein the hard carbon film includes terminal atoms that bond to carbon atoms and has a plurality of protruding shaped parts, part of which protrude from the surface thereof, with the periphery of each of the plurality of protruding shaped parts being terminated by a terminal atom. A manufacturing method for the hard carbon film for producing the hard carbon film on a sliding surface of the sliding member using arc vapor deposition having graphite as the vaporization source, wherein a gas containing the terminal atoms that bond to carbon atoms is introduced, and the plurality of protruding shaped parts is grown on the surface of the hard carbon film while terminating the periphery of the plurality of protruding shaped parts by bonding of the terminal atoms to carbon atoms.

The invention discloses a scale removal device for profile steels, and is applied to the technical field of rolling of profiles. The scale removal device for profile steels mainly comprises a ring type header, a guide and guard box, a rolling piece and a connecting rack. A profile rolling production line is provided with the ring type header which can allow the rolling piece to pass through the inside of the ring type header, in a rolling process, the ring type header can obliquely spray high-pressure water to the upper surface of the rolling piece through an annular spraying opening in the upper portion of the ring type header, and iron oxide on the surface of the rolling piece in the peripheral 360-degree direction can be beaten and cleaned thoroughly by high-pressure water without deadzones. The scale removal device for the profile steel is simple in structure and easy to mount and manufacture, and can be mounted at different positions of the rolling production line according to actual rolling production requirements.

Disclosed are oral care compositions comprising an abrasive system, wherein the abrasive system comprises (a) a first particulate abrasive comprising at least 20 wt % pumice, based on the weight of the oral care composition, having an average particle size of from 20 to 300 microns; and (b) a second particulate abrasive comprising calcium carbonate having an average particle size of from 2 to 13 microns. There is also disclosed a method of cleaning teeth comprising applying the oral care composition to a tooth surface, the oral care composition being applied as a paste disposed in a prophy cup.

The invention provides a steam generator for metal fast reactor. The steam generator comprises a container body and a heat exchanger arranged in the container body. The container body is provided witha primary side outlet, a primary side inlet, a secondary side outlet and a secondary side inlet from bottom to top, and at least a shell pass and a first pipe pass are formed in the container body. Ahigh-temperature medium enters the shell pass through the primary side inlet, and is exported from the primary side outlet after cooling. A low-temperature medium enters the first pipe pass through the secondary side inlet, and is exported from the secondary side outlet after heating. According to the steam generator for the metal fast reactor, the mode that the high-temperature medium flows through the shell pass and the low-temperature medium flows through the pipe pass is used, the velocity of the shell pass as well as the abrasion degree of the pipe wall of a heat exchange pipe and the container wall are reduced, the circulation ability is improved, and the reliability and safety of the steam generator are improved.