摘要:
A method of directional drilling which comprises an intelligent non-invasive ultrasonic sensors that can detect the approaching of an existing well and then can stop and redirect the directional drilling to prevent collisions with preexisting wells.
摘要:
This invention concerns a method for precipitating polymers from a liquid using at least one precipitant fluid, including a feed line, a nozzle plate having at least one outlet orifice for a polymer containing fluid with the outlet orifice communicating with the feed line, at least one nozzle for at least one precipitant fluid, the axis of which is arranged approximately perpendicularly to the axis of the outlet orifice, a precipitation chamber positioned on the side of the nozzle plate wherein at least one nozzle for at least one precipitant fluid is located, a discharge line for discharging a mixture which contains the precipitated polymer and a degassing chamber which is connected to the discharge line.
摘要:
An overhand sewing machine for the sewing of innersoles to the shanks of shoes comprises two driven conveying disks, an inner conveying disk in contact with the shank material, and an outer conveying disk in contact with the innersole material, the outer disk being displaceable with respect to the inner disk in order to be pressured by spring-loading against the inner disk, and to be capable of moving away against the spring-loading from the inner disk, as required for the insertion of the material to be sewn into the overhand sewing machine. In order to avoid difficulties in sewing along narrow curves with relatively small radii of curvature, in particular along the heel rounding of the innersole and the shank of the shoe, a clutch is provided to interrupt the drive of the outer disk, the clutch being preferably located between two mutually coaxial shafts for the drive of the outer disk, while having the configuration of a clamp or friction clutch, and being actuated by a motor controlled by the operating personnel, and disengageable when sewing along a narrow curve so that only the inner disk is driven, while the outer disk remains in idle.
摘要:
This disclosure relates to a class of novel 6-substituted-5-phenyltetrazolo[1,5-a][1,2,4]triazole [1,5-c]pyrimidines and to pharmaceutical compositions containing such compounds. The compounds and compositions disclosed are useful as renal vasodilators, diuretics and/or anti-hypertensive agents for the treatment of hypertensive disorders in humans.
摘要:
The instant invention is directed to a thermoplastic synthetic material, comprising:(A) 75 to 97% by weight of a thermoplastic polyurethane and(B) 25 to 3% by weight of a polymer of olefinically unsaturated monomers, wherein component (B) is a graft product of(a) 5 to 35% by weight, based on the graft product, of one or more graft monomers on(b) 65 to 95% by weight, based on the graft product, of an elastomer component serving as graft base which has a second order transition temperature of below -30.degree. C.,the entire component (B) containing less than 50% by weight of the monomers styrene, .alpha.-methyl styrene and acrylonitrile. The instant invention is also directed to a process for the production of the thermoplastic synthetic materials.
摘要:
For cleaning a flow of used air from a spray booth wherein articles are lacquered, a duct is provided with a first constriction where the flow of used air is brought into contact with washing fluid so as to wet lacquer particles in the used air. Downstream of the first constriction a guide conduit, which has a bend therein deflects the flow of used air and the washing fluid. The guide conduit is provided with a second constriction and after the flow of used air and the washing fluid have been deflected they pass through the second constriction, which is narrower than the first. Turbulence is thus created and the washing fluid is atomized and intimately mixed with the used air.
摘要:
The instant invention is directed to a continuous process for the production of thermoplastic polyurethanes by reactingA. one or more substantially linear polyols having molecular weights in the range from 400 to 10,000,B. one or more organic diisocyanates andC. a hydroxyl-group-containing chain extender having a molecular weight below 250,the ratio of the NCO-groups in component (B) to the Zerewitinoff-active groups in components (A) and (C) lying between 0.90 and 1.2, in extruders, characterized in that the chain extender (C) used is a mixture of at least two different glycols, of which one is present in a quantity of from 50 to 99% by weight, based on the total amount of component (C), and a second in a quantity of from 1 to 50% by weight, based on the total amount of component (C).
摘要:
The invention relates to a method for producing melem-free melamine by means of aqueous processing of a melted mass of melamine which is obtained using a high-pressure method. According to the inventive method, the melted mass of melamine is quenched by means of an aqueous solution containing alkalis, following the isolation of the off-gases, and is directly transferred into an aqueous alkaline melamine solution, out of which the melamine is then crystallized. The invention thus enables melamine to be obtained, with a melam content of less than 1000 ppm and a melem content of less than 50 ppm. The invention also relates to a quenching agent.
摘要:
A device for precipitating polymers from a liquid by at least one precipitant fluid includes a feed line, a nozzle plate having at least one outlet orifice for a polymer containing fluid with the outlet orifice communicating with the feed line, at least one nozzle for at least one precipitant fluid, the axis of which is arranged approximately perpendicularly to the axis of the outlet orifice, a precipitation chamber positioned on the side of the nozzle plate wherein at least one nozzle for at least one precipitant fluid is located, a discharge line for discharging a mixture which contains the precipitated polymer and a degassing chamber which is connected to the discharge line.
摘要:
A support web is described for roof foundation webs which comprises a spunbonded web of polyester filaments. The spunbonded web has a basis weight of 50 to 100 g/m.sup.2 and a filament denier of 1 to 8 dtex. It has been thermomechanically preconsolidated by means of a smooth calender and end-consolidated by means of a binder. This produces a high tear propagation resistance and nail removal resistance and good dimensional stability at high temperatures. The spunbonded web is therefore particularly suitable for use as a support web for bituminized roof foundation webs.