Abstract:
Process for forming a fiber-reinforced, heat-fusible polymeric composite wherein a dilute aqueous slurry of reinforcing fibers and solid heat-fusible polymeric particles are deposited on a foraminous support, and the resulting mat de-watered and heat-fused. The improvement in forming an unfused mat of improved integrity and for improving the processability of the dilute aqueous slurry comprises incorporating into the aqueous slurry a stabilizing amount of pulp fibers characterized as being less than about 10 mm in length, being flexible, and having broomed ends (e.g. micro-fibrillar).
Abstract:
The method concerns the comparison of a measured speed curve (S) with a reference speed curve (R) of a signature for example. The signals of the reference are read by the rectangle (A) and those of the measured curve are read by the rectangle (B). The measured speed curve is divided into equal segments. The position of each segment of the measured curve is determined with respect to the corresponding segment of the reference curve up to the obtention of the best matching (C1). Thereafter, each segment of the measured curve is affected with a correction factor for the correction of its time scale in order to obtain the best correlation of the two segments (C2). The segments of the measured curve thus normalized are then compared to the corresponding segments of the reference curve (D), and the results are transmitted to a decision lozenge (E) which determines if the results are acceptable.
Abstract:
The metal substrate (4) is coated with a coating (6) of another metal or alloy having a thickness of 4 to 50 mu m by depositing a melted metal or alloy (5) through a nozzle (2), the melting point thereof being lower than that of the substrate metal. Said coating is composed, starting from the substrate, of a layer of an intermetallic compound having a thickness of 0,5 to 4 mu m within a limit not exceeding 40% of the total thickness, the rest being the initial metal or alloy used for the coating in a proportion comprised between 97% and 99.5% by weight.
Abstract:
Optical glasses based on silica and alumina, rich in modifying metals such as silver, thallium and cesium. The exchange by cathodic migration in a melted salt bath of said modifying metals by metals such as K, Na and Li, exchange which leads to a corresponding variation of the refraction index of the glass according to a certain predetermined profile, is performed very efficiently and rapidly. Such an exchange is performed either on the finished glass or on a microporous form thereof.
Abstract:
The method is based on the interaction radiation-material of a structure presenting discontinuities and in which at least one layer provides for the transport of electrons. To this effect, a stimulation signal (Si) is provided through the device to be tested and in conjunction therewith at least one radiation source (2) sends an incident radiation (ri) against the surface of the device (1). The secondary radiation (ri) emitted by the device (1) is detected as well as the response (Sp) of the device (1). Said signals are compared either individually or in combination to a reference.
Abstract:
Raw sugar-beet pulp impregnated with acidified water is subjected to a succession of alternated compressions and decompressions. This mechanical stress causes a sort of retting of the pulp fibers, that is to say an effect such that they become separate from each other, their directional rearrangement and the dissolution of the pectin.
Abstract:
The method consists in bringing the temperature of a probe immersed in the fluid to a temperature threshold corresponding to an electric resistance (R1), in measuring at least a second temperature threshold corresponding to a second resistance (R2, R3), in measuring the time elapsed between the passage to those different thresholds, and in calculating a fluid parameter associated to the thermal transfer between the probe and the fluid, namely the temperature, the speed, the viscosity, the density, the specific heat or the thermal conductibility.
Abstract:
This invention pertains to surfactant-templated nanometer-scale porosity of a silicia precursor solution and forming a mesoporous material by first forming the silicia precursor solution into a preform having a high surface area to volume ratio, then rapid drying or evaporating a solvent from the silicia precursor solution. The mesoporous material may be in any geometric form, but is preferably in the form of a film, fiber, powder or combinations thereof.
Abstract:
The present invention is a method and apparatus for altering a carbon containing compound in an aqueous mixture. According to a first aspect of the present invention, it has been discovered that for an aqueous mixture having a carbon containing compound with an ozone reaction rate less than the ozone reaction rate of pentachlorophenol, use of corona discharge in a low or non-oxidizing atmosphere increases the rate of destruction of the carbon containing compound compared to corona discharge in an oxidizing atmosphere. For an aqueous mixture containing pentachlorophenol, there was essentially no difference in destruction between atmospheres. According to a second aspect of the present invention, it has been further discovered that an aqueous mixture having a carbon containing compound in the presence of a catalyst and oxygen resulted in an increased destruction rate of the carbon containing compound compared to no catalyst.