A biaxially stretched film of an ethylene copolymer, preferably a mixture of (A) 90 to 50% by weight of a linear ethylene- alpha -olefin copolymer having a density of 0.90 to 0.93 g/cm3 at 25 DEG C. and a melt index of 0.2 to 3.0 g/10 min. and (B) 10 to 50% by weight of an ethylene polymer having a density of 0.87 to 0.91 g/cm3 at 25 DEG C. and less than the density of the copolymer (A) by at lea...

An improved process for the preparation of acrylonitrile by the reaction of propylene, ammonia and oxygen in a fluidized catalyst bed in which the propylene and ammonia are premixed and fed in downwardly streams that are directly aligned with upwardly directed streams of an oxygen containing gas under conditions such that there is complete mixing of the gas streams prior to the gases having signif...

A down-hole signal generator for a mud-pulse telemetry system comprises a flow constrictor defining a throttle orifice for the mud passing along a drill string, a throttling member displaceable with respect to the throttle orifice to modulate the mud pressure for the purpose of transmitting measurement data up the drill string, and a turbogenerator. The turbogenerator incorporates an annular impel...

A geomechanical probe for a drilling well comprises a logging box located between two inflatable preventers and including a plurality of tracers movable radially and urged outwards by springs for engaging the well wall. The tracers are mounted on pistons which are received in cylinders and urged radially inwards by springs for retracting the tracers, the pistons being driven outwardly to displace ...

A string of well tubulars, such as a well casing or a drill string, is prior to installation of the string in a borehole magnetized along at least part of the length thereof by creating a magnetic field having flux lines which pass in a substantially longitudinal direction through an elongate section of the string, thereby magnetizing said section such that it has opposed magnetic poles having a p...

PURPOSE:To prevent a semiconductor element from deterioration due to the generation of heat as well as to prevent the occurrence of defectives due to disconnection by a method wherein a copper plate placed with a semiconductor chip is housed in a recessed part provided on an alumina substrate. CONSTITUTION:A copper plate 4 placed with a semiconductor chip 3 is housed in a recessed part 7 provided ...

PURPOSE:To increase the maximum current flowing through a wiring, by making up a multilayer current path by laminating alternately a superconducting layer and an insulating layer. CONSTITUTION:After an insulating layer 8 turning to a base layer is formed on a substrate 7, an electrode 9 is formed by etching and eliminating a part of the insulating layer 8. A superconducting layer 5 and an insulati...

PURPOSE:To realize the ascent of superconducting transition temperature, by of a multilayered film (superlattice structure) making the structure of superconducting material. CONSTITUTION:On a tungsten substrate (100 deg.C), Y, Ba, Cu and O are vapor- deposited with a mole ratio of 1:2:3:7, by using a molecular beam evaporation system. After deposition of 1000Angstrom , tungusten is likewise vapor-...

The coverage and adhesiveness of metal plating to polycarbonate resin is enhanced by treating the resin prior to etching with a swellant composition comprising a compound represented by the general formula: R1 (OCn H2n)m O - R2 wherein R1 and R2 are independently selected from the group consisting of aryl groups and alkyl groups of 1-4 carbon atoms, n is 2 to 4 and m is 1 to 5. The subsequent etc...

The invention refers to a process of forming shaped articles from starch, which process comprises: (a) heating a composition comprising a pre-processed and essentially destructurized starch/water material, at a water content in the range of from 10 to 20 % by weight based on the weight of the composition to a temperature sufficient to essentially destructure the starch. (b) transferring the me...

The solvent-resistance and thermal stability of polyamideimides of the general formulae: is improved by capping the amideimides with a crosslinking functionality (Y) containing a residue selected from the group of: wherein R1 = lower alkyl, lower alkoxy, aryl, aryloxy, substituted alkyl, substituted aryl (either including hydroxyl or halo-substitutents), halogen, or mixtures thereof...

What is described herein is a liquid U.V. stabilizer composition and process for effectively surface modifying a PVC resinous body to provide a stabilizing amount of U.V. stabilizer within the surface region of the body within a predetermined solution contact time without leaving an appreciable amount of solvent therein or stabilizer on the surface of the body, and without affecting the surface ap...

Porous PTFE materials having high strength and coarse microstructure are produced by densifying the materials after removal of lubricant and then stretching. The term, "coarse", is used to indicate that the nodes are larger, the fibrils are longer, and the effective pore size is larger than conventional materials of the same matrix tensile strength. Densification can be achieved through the use of...

The present invention cleans gas produced from solid carbonaceous materials in a two stage gas producer. Second stage gas from the gas producer is passed through a first precipitator to remove oil mist and particulates from the second stage gas. First stage gas from the gas producer is passed through a cyclone to remove particulates from the first stage gas. The first stage gas from the cyclone is...

TITLE Polyvinyl Fluoride Coating Process Substrates are coated by heating the substrates to temperatures of 120-260.degree.C and dipping them into a bath of polyvinyl fluoride dispersed in latent solvent at temperatures below 100.degree.C.

HEAT STERILIZABLE POLYOLEFIN COMPOSITIONS AND ARTICLES MANUFACTURED THEREFROM Heat-sterilizable films are made from 2 polymer blend of about 10 to about 60 wt % random propylene-ethylene copolymer containing from about 1 to about 6 wt % ethylene-derived units and about 40 to about 90 wt % linear low density polyethylene. The films are especially useful in the manufacture of collapsible parenteral ...

A butadiene-free, thermoformable film for the interior of motor vehicles, comprising certain amounts by weight of vinyl chloride homopolymers, copolymers, terpolymers and/or graft polymers, a plasticiser and at least one further butadiene-free polymer, namely a polymethyl methacrylate-acrylate graft polymer, and, if desired, an acrylate and/or methacrylate copolymer.

There is described a method for manufacturing a multilayer coating and a coating composition suitable for this purpose comprising an aqueous dispersion of a polymer having particle diameters in the polymeric phase of from 10 nm to 500 nm, said polymer having a number average molecular weight of from 10,000 to 500,000 and an acid number of from 12 to 40, and the dispersion having been obtained by c...

The cleaning apparatus is formed by a housing member adapted to be inserted into an air duct and which has two spaced apart ports for providing an air flow path through the housing member. A flexible hose has one end coupled to one of the ports and is employed for moving the housing member in the air duct and for providing a passage for the flow of air from or to the housing member. A turbine form...

An improved efficiency arcjet thruster has a constrictor and electrically-conductive nozzle anode defining an arc chamber, and an electrically-conductive rod having a tip spaced upstream from the constrictor and defining a cathode spaced from the anode by a gap generally coextensive with the arc chamber. An electrical potential is applied to the anode and cathode to generate an electrical arc in t...