213 results about "Micrometre" patented technology

This invention relates to a polyethylene film having a MD 1% Secant Modulus of 220 MPa or more and an MD Elmendorf Tear of Y g/micron, where Y≧−0.4515(Dart Drop in g/micron)+33.3 g/microns, wherein the MD Elmendorf tear is at least 11.8 g/micron.

A method and an apparatus for laser marking indicia in the volume of gemstones such as diamonds, the indicia being made up of a plurality of microscopic dot-shaped marks whose build-up can be initiated by exposing naturally-occurring internal defects or impurities in the volume of a gemstone to a tightly focused train of laser pulses. Authentication data is encoded in the gemstone from the relative spatial arrangement of the dot-shaped marks that form the indicium. Taking advantage of the presence of otherwise invisible defects in the gemstone allows for inscribing indicia with laser pulses carrying energies substantially lower than the threshold energy required for inscribing in the volume of a perfect gemstone material. The marking process is then much less susceptible to inflict damages to the surface of the gemstone, and the marking can be performed using a broad variety of femtosecond laser systems. The dot-shaped marks engraved at a depth below the surface of a gemstone can be made undetectable with the unaided eye or with a loupe by limiting their individual size to a few micrometres, while devising indicia made up of only a few marks. As a result, the marking does not detract from the appearance and value of the gemstone. The procedure for laser marking accounts for the random spatial distribution of the defects present in natural gemstones as well as for their strongly localized character. The presence of an indicium can be detected by using a dedicated optical reader that can be afforded by every jewellery store.

The invention discloses a dual-metal sliding bearing and a preparation method thereof. Carbon steel or stainless steel is taken as an outer layer material, and a powder metallurgy material taking a copper alloy as a basal body is taken as an inner layer material; the inner surface of the outer layer material is electroplated to form an electroplated copper layer with the thickness of 4-8 micrometres; the inner layer material comprises the following components by weight percent: 1%-20% of aluminum, 1%-8% of titanium, 1%-15% of stannum, 0.1%-5% of ferrum, 0.1%-2% of phosphorus, 0.1%-5% of nickel, at least one of 0.1%-2% of graphite and 0.1%-2% of molybdenum disulfide or 0.1%-2% of zinc stearate, and the balance of copper; and the bearing is impregnated with lubricating oil. The dual-metal sliding bearing has the advantages of low cost, high carrying capability, self-lubrication, excellent abrasion resisting capability, and the like, and can be widely applied to reciprocating swing positions of a swing arm, a bucket rod, a bucket, and the like of a large-tonnage and high-power excavator.

The invention discloses enamel steel for a cold rolling water heater and a manufacturing process thereof. The enamel steel for cold rolling water heater comprises components as follows in percentage by weight: C: 0.01%-0.08%. Si: less than or equal to 0.03%, Mn: 0.10%-0.60%, P: less than or equal to 0.02%, S: 0.003%-0.02%, N: 0.001%-0.006%, AIs: less than or equal to 0.04%, Ti: 0.02%-0.12%, and the balance of ferrum and unavoidable impurities, wherein excess Ti content in steel is equal to Ti-(4*C+3.43*N=1.5S) which is less than or equal to 0. The manufacturing process is characterized in that the heating temperature of billet steel is 1160-1300 DEG C; the hot rolling finish rolling temperature is 850-950 DEG C; the coiling temperature of steel plates is 660-760 DEG C; the cold rolling draft is 60%-80%; the annealing temperature is 760-880 DEG C; the temperature preservation time is 60-200s; rapid cooling speed rate is 15-45 DEG C/s, planishing elongation is 0.7%-1.8%; and surface roughness is 0.7-1.9 micrometres. The invention has the advantages of excellent formability, enamel-spreadable property, pressing resistance, weldability and fish-scaling resistance, stable yield strength after enamelfiring, less cost increase, stable effect and significant economic benefits.

Micron-sized particles are produced in quantity by one of various methods, including generally the steps of preparing a substrate surface through a lithographic process, the surface being characterized by defining a plurality of elements, depositing a layer of particle material on the substrate surface including the elements, processing the substrate surface to isolate the material deposited on the elements, and separating the particles from the elements. The size and shape of the elements predetermine the size and shape of the particles. The elements may comprise, inter alia, pillars of photoresist or spaces on the substrate surrounded and defined by photoresist.

The invention relates to a hot rolled sheet which is made from austenitic iron/carbon/manganese steel and which has a resistance of greater than 900 MPa, whereby: resistance (MPa) x elongation at rupture (%) is greater than 45000. The chemical composition of the inventive sheet comprises the following concentrations expressed as weight: 0.5%=C=0.7%, 17%=Mn=24%, Si=3%, Al=0.05%, S=0.03%, P=0.08%, N=0.1% and, optionally, one or more elements such as Cr=1%, Mo=0.4%, Ni=1%, Ti=0.5%, Nb=0.5%, V=0.5%, Cu=5%, Cu=5%, the rest of the composition comprising iron and impurities resulting from production. According to the invention, the recrystallised fraction of the steel is greater than 75% and the surface fraction of precipitated carbides of the steel is less than 1.5%, the average grain size of the steel being less than 18 micrometers.

The invention discloses a method for preparing TiC-TiB2 nanometer-micro complex phase ceramics coating, including the steps of: bonding granule, the gramularity of which is 30 Mum, is produced by ion densification granulating after mixing uniformly the reactive A selected from Ti or TiO2, the reactive B selected from boron, B2O3 or B4C, the reactive C, nanometer TiC and rare-earth oxide powder precursor; hot spraying Ni alloy base coat of 0.1-0.3mm on 45 steel base, then cold spraying a bonding granule of 0.5-1mm; coating liquid absorbing paint comprising nanomete oxide and other addition agent for improving absorptivity for CO2 laser on the surface of pre-assembly coating; TiC-TiB2 nanometer-micro complex phase ceramics coating is produced by laser-scanning the said pre-assembly coating. The invention can solve the defects that today' TiB2 coating has low cost, low efficiency, low toughness and poor binding force with based body.

The present invention pertains to a powder coating material comprising particles having a particle size distribution which satisfies the following equation: [d(s,90)/d(s,10)]²÷[d(s,90)−7]≦3.5 and in which d(s,90) is greater than 7 μm, d(s,90) and d(s,10) being measured in microns. The powder coatings can be obtained via a grinding-classification process or an agglomeration process. In a preferred embodiment the particles are prepared by a process which comprises mechanical fusion of a powder coating material, wherein the powder is brought to a maximum temperature in the range of from the Tg of the powder to 15° C. above the Tg, at a heating rate for at least the last 3° C., preferably at least the last 4° C., up to the maximum temperature of no more than 4° C. per minute, and after a period in the range of from 0 to 40 minutes at the maximum temperature the powder is cooled.

The invention provides an aqueous shampoo composition comprising: (i) one or more anionic cleansing surfactants; (ii) preferably, discrete, dispersed droplets of a water-insoluble conditioning agent with a mean droplet diameter (D_3,2) of 4 micrometres or less; (iii) one or more cationic polymers (A) selected from cationically modified acrylamide polymers having a cationic charge density at pH7 of less than 1.0 meq per gram, cationically modified celluloses and mixtures thereof, and (iv) one or more cationic polymers (B) selected from cationically modified acrylamide polymers having a cationic charge density at pH7 of greater than 1.0 meq per gram, cationically modified polygalactomannans, and mixtures thereof, wherein the composition comprises a cationic polymer other than a cationically modified acrylamide polymer.

The invention relates to alumina coat slurry and a preparation method thereof, and mainly solves the problems of the prior art of poor stability of a prepared laminar composite carrier and short service life of a prepared thin-shelled noble metal catalyst. The alumina coat slurry comprises the following components: aluminum sol with an average granularity of less than 20 micrometres, active alumina, an organic adhesive, an inorganic adhesive, a surfactant, a pH modifying agent and the balance being water, wherein the average granularity of the slurry is less than 10 micrometres. The preparation method comprises the following steps: dissolving the aluminum sol, the organic adhesive, the surfactant and the pH modifying agent in water; mixing the mixture evenly with stirring at a high speed; then adding the inorganic adhesive and active alumina powder for high-speed dispersion; and regrinding the obtained alumina coat slurry to prepare the alumina coat slurry. Thus, the preparation method better solves the problems by adopting the technical proposal, and can be used in the industrial production of laminar composite carrier.

The invention relates to a generating device of quasi-monodispersed submicron aerosol by using an evaporation condensation method. The generating device comprises a high-pressure gas source, a first filter, a sprayer, a diffusion desiccator, a second filter, a saturator, a reheater, a condenser tube, and a first valve as well as a second valve, wherein, the first valve and the second valve are respectively used for adjusting the flow capacity of the second filter and the saturator; the high-pressure gas source adopts a high-pressure air source; the reheater and the condenser tube adopt metallic conduits; a baffle plate is arranged at a jet exit of the sprayer; a screen mesh or a closing ring is arranged at the inlet of the condenser tube. The generating device is convenient and durable, the running cost is low, the median diameter in aerosol generating counting ranges from 0.08 micrometres to 0.5 micrometres, the geometric standard deviation is less than 1.3, the counting concentration ranges from 1*10<4> to 1*10<8>/cm<3>, the stability and the repeatability are good when in generation, and the requirements of various equipment inspections and experimental researches can be satisfied.

A coating for surfaces, comprises at least one polysilazane of the formula 1 and/or of the formula 2 where n is an integer and is dimensioned such that the perhydropolysilazane has a number average molecular weight of 150 to 150 000 g/mol, a solvent and catalyst and, if appropriate, one or more cobinders, for preventing scaling and corrosion on metal surfaces. The hardened coating has a thickness of at least 0.2 - 10 micrometres, preferably 0.3 to 5 micrometres. It is particularly useful as a protective coating for metals for preventing scaling and corrosion.

The invention provides a prepreg comprising matrix and fibres, having deposited thereon a plurality of regions raised at least 5 micrometres relative to the surface of the matrix, a method of preparing such a prepreg, a method of curing a laminate of a plurality of such preprags and the cured laminate produced by such a method.