Abstract: A process is provided for electrically treating a non-conductive, moldable material by inducing therein a desired electrical effect before it is molded into a desired shape. The process includes pressing, injecting or extruding a material to form a tube, film, rod or the like. The material is then electrically treating the material to induce therein a desired electrical effect. Thereafter, the at least some of the induced electrical effect within the material is permitted to relax. A detectable electrical current is generated by this relaxation. The electrical current is the analyzed and/or monitored. When practicing this invention, the creation of an induced electrical effect, relaxation thereof and analysis of the electrical current generated thereby are performed after or while the material has been, or is being, pressed, injected or extruded, but before the material is molded into its desired shape.

Abstract: The present invention relates to an apparatus which is designed to employ thermal stimulated processes for analyzing relaxation spectra and resonances in materials. The invention is characterized in that at least two coupled excitation fields are applied to the sample of material analyzed along with a programmed temperature variation, to deconvolute during the thermally stimulated recovery stage the global deformation resulting from the excitation stage. In other words, this invention is designed to obtain one by one the individual and elementary relaxation motions responsible for the global deformation, whether these elementary internal motions have a mechanical, electrical or magnetic origin. Moreover, the relaxation spectra for the motions resulting from the coupling between mechanical, electrical and/or electromagnetical excitations are obtained at the same time and are interrelated.

Abstract: A process for manufacturing molded plastic products wherein the process includes:(a) subjecting a mold to a mold preconditioning stage by heating it to a temperature which is conducive for molding a deformable plastic material therein,(b) introducing a deformable plastic material into or over a cavity defined within the preconditioned mold,(c) molding the deformable plastic material,(d) heat-treating the molded plastic material by subjecting it to a treating temperature (T.sub.O) which is at least equal to about 1.0 times the value of the material's glass transition temperature (T.sub.g), when T.sub.g is expressed in degrees Kelvin,(e) subjecting the mold and the heat-treated material to a rheological transformation process preconditioning stage by adjusting the temperature to one which is conducive for a rheological transformation process,(f) subjecting the preconditioned material to a rheological transformation process, and(f) removing the molded product from the mold.

Abstract: The present invention relates to the use of thermal stimulated processes for analyzing relaxation spectra and resonances in materials. The process is characterized in that at least two coupled excitation fields are applied to the sample of material analyzed along with a programmed temperature variation, with the objective to deconvolute during the thermally stimulated recovery stage the global deformation resulting from the excitation stage, i.e. obtain one by one the individual and elementary relaxation motions responsible for the global deformation, whether these elementary internal motions be of mechanical, electrical or magnetic origin. The process is characterized in the fact that the relaxation spectra for the motions resulting from the coupling between mechanical and electrical (and/or electromagnetical) excitations are obtained at the same time and are inter-related.

Abstract: A cylindrical product, such as a hollow tube or solid rod, is subjected to a series of manufacturing processes. The cylindrical product is moved longitudinally through a sequence of stages, each stage having an opening through which the cylindrical product passes. The plurality of stages are arranged in a series to perform a specific rheological process. Each stage includes means for applying a preselected temperature, pressure, and vibration to the cylindrical product.

Abstract: The invention relates to a method and apparatus for transforming the physical characteristics of a material such as for an end finished molded product and to the materials or products obtained thereby. The method and apparatus are characterized in that the temperature of the material is simultaneously varied with at least one other rheological variable such as hydrostatic pressure, shear stress, mechanical vibration (frequency or amplitude), dielectric vibration (frequency or amplitude) for dielectric materials and electromagnetic properties for metallic materials. The variation in temperature and the simultaneous variation in one or more other rheological variables are intimately connected by a relationship selected and specifically programmed to obtain a product having improved properties.

Abstract: The invention relates to a device for modifying and controlling the shape of an output signal. It depends on the development of a parameter (temperature, pressure, stress . . . etc.) supplied by a transducer, and comprises an electrical circuit with two branches each receiving the input signal (V.sub.1) to be transformed, one of the branches including a linear circuit effecting a linear transformation (A.sub.0 +A.sub.1 V.sub.1) of the input signal (V.sub.1) and the other branch including on the one hand a multiple linear circuit to effect a multiple linear transformation (A.sub.2 +V.sub.1), (A.sub.3 +V.sub.1), (A.sub.4 +V.sub.1 . . . etc.) giving the intermediate signals (X=A.sub.2 +V.sub.1) and (Z=A.sub.4 +V.sub.1 . . . etc.), and on the other hand a combining circuit receiving the intermediate signals (X, Y, Z) to combine them by multiplication (X.sup..alpha., Y.sup..beta., Z.sup..gamma. . . . etc.) the designations, .alpha., .beta., and .gamma. are integers which can assume the values 0, + 1, or -1.