Abstract: Disclosed is an improved process for the preparation of an electrostatographic photoreceptor which comprises:A. preparing a free-standing film of an unoriented, organic, active transport material by solvent coating the material onto a non-adherent base and removing at least part of the solvent;B. detaching the film from the base;C. annealing the film above its glass transition temperature to provide a film free of strains;D. vapor depositing a film of a photoconductive material onto the organic film; andE. attaching the film of photoconductive material at its exposed surface to a conductive substrate with an adhesive material.

Abstract: A sheet film is produced from a tubular thermoplastic resin film by cooling a molten tubular film of crystalline thermoplastic resin, for example, polypropylene, extruded downward from an annular die in direct contact simultaneously with cooling liquids on the outside and inside of the film, the cooling liquid on the outside being in an outside cooling liquid tank and in contact with the outside of the film and the cooling liquid on the inside flowing down along the surface of a mandrel provided through the outside cooling liquid tank and in contact with the inside of the film, a liquid level of the cooling liquid on the inside being kept higher by 5-15 mm than that of the cooling liquid on the outside; cutting open length wise one or two side ends of the film just before being flattened and folded by nip rolls thereby to discharge the cooling liquid from the inside; and removing the liquid attached to the surfaces of the resulting sheet films withdrawn by the nip rolls promptly.

Abstract: In the method of this invention a substantially linear polyurethane filament is elongated a number of times its original length and heated at a temperature above its "fiber stick temperature" for a sufficient time so that the filament permanently retains that elongation and does not recover any substantial amount of the length to which it has been elongated.

Abstract: Polyester monofilaments having very high strength and low elongation also at elevated temperature and being resistant against tire rubber are obtained from polyesters having an intrinsic viscosity of more than 0.67 and terminal carboxy groups of less than 25 milliequivalents/kg by spinning into a water bath, a first drawing in a water bath having a temperature of from 70.degree. to 100.degree. C in a ratio of from 1 : 4.0 to 1 : 6.0, a second drawing at a temperature being a maximum 15.degree. C below the melting point to attain a total drawing ratio of from 1 : 6.0 to 1 : 7.5, and subsequent setting at a temperature being a maximum 15.degree. C below the melting point without allowing a shrinkage.

Abstract: A process for stabilizing printed circuit board substrate or laminate through application of a number of laminate conditioning and baking cycles which function to provide the laminates with dimensional stability. This enables greater control and more precise drilling of the laminates in subsequent fabrication and assembly operations. The dimensional stability for a substrate becomes more critical as the substrate size is increased.

Abstract: Described herein are articles which are heat recoverable in involute fashion to an overlapping, generally cylindrical configuration and which are useful as wrap-around sleeves for wires, cables, cable splices and the like. Also described are articles initially heat recoverable to an elongate S-shaped configuration, which latter can be wrapped about an elongate substrate, the edge portions thereof interlocked, and heat recovered to form a protective closure. The articles of the invention comprise a molecularly oriented unitary polymeric layer which has been differentially annealed while restrained against dimensional change and cross-linked to provide an anisotropic gradient from a first to a second primary face of the layer through the thickness thereof. Subsequently, when the article is heated to recovery temperature, regions of high anisotropy adjacent one primary face of the layer shrink.

Abstract: Method for preparing a biaxially oriented polyvinyl alcohol film by extruding a mixture of polyvinyl alcohol and water, and if desired, incorporated with a polyhydric alcohol, in a tubular form, drying the tubular film to give a tubular non-stretched film having a degree of crystallization of not more than 44 % and a water content of not more than 20 % by weight, and biaxially stretching the non-stretched film at a stretching ratio of not less than 2 in each of the machine and transverse directions by means of inflation under conditions such that the film surface at the starting point of stretching is maintained at a temperature in the range from about 60.degree. to about 150.degree.C., the surface of the film reaching a maximum temperature at the middle portion of a stretching zone extending from said starting point to a point where the tube reaches a maximum diameter and the difference between maximum and minimum surface temperatures in the stretching zone does not vary more than about 15.degree.C.

Abstract: A tie or harness for bundling items and having a strap with a tip having guide means to aid in the entry of the strap into a channel of the head of the harness, the guide means also preventing wrong way insertion of the strap into the head as well as providing means for firmly holding a blank used to form the strap tie in order to stretch same.

Abstract: A process for the production of a polyethylene terephthalate film characterized by carrying out heat setting after biaxial elongation so that the heat set temperature and heat set time may satisfy the following relations:______________________________________ heat set temperature 140-213.degree.C. log t .gtoreq. -0.14T + 10.99 heat set temperature 213-223.degree.C. log t .gtoreq. -0.14T + 30.8 heat set temperature 223-255.degree.C. log t .gtoreq. -0.0186T + 3.73 ______________________________________in which T is a heat set temperature (.degree.C.) and t is a heat set time (min.), and thus obtaining a cleavage-free film.

Abstract: The invention relates to a process for the production of polyacrylonitrile tows containing from 7 - 15 % by weight, preferably from 10 - 12 % by weight, of comonomer components from which it is possible to produce yarns having low boiling-induced shrinkage values and yarns and dimensionally stable made-up articles with improved textile properties which comprises reducing the tow-shrinkage emanating from the spinning and stretching process by 80 - 95 % of the original tow shrinkage by heat-fixing and eliminating subsequently the residual shrinkage by fixing with saturated steam.

Abstract: This disclosure relates to a process of reducing the creep characteristics of plastic containers, principally bottles, jugs or the like, by providing a cartridge having upper and lower ends and a plurality of vertically extending transversely inter-connected chambers also having upper and lower ends, blow molding a plurality of containers, stacking the blow molded containers vertically upwardly through the lower ends of the chambers toward the upper ends thereof atop and in contact with each other in an upright position in each chamber, transferring the cartridge into a heat treatment bay, circulating hot air in contact with the plastic containers in a direction upwardly from and through the lower ends through the upper ends in an open condition and through and between the chambers for a predetermined period of time and at a predetermined temperature sufficient to reduce the creep characteristics of the plastic containers, and removing the cartridge from the heat treatment bay.

Abstract: The discoloration of molded articles made from poly(arylene sulfide) resins is minimized or prevented by treating the molded article with water at an elevated temperature.

Abstract: Insulation is extruded onto a conductor and immediately quench-cooled to obtain solidification for retaining concentricity of conductor and envelope. The envelope is reheated under pressure to melt a surface zone, followed by gradual cooling whereby the melted zone migrates into the interior. Reheating under pressure and gradual cooling, possibly also under pressure, improves texture, and provides for a more ordered crystal structure and/or fuller crosslinking. Following extrusion, and on reheating, the cable is freely suspended and assumes catenoidal contour while advancing to avoid sliding contact of the outer surface until adequately stable solidification has taken place.

Abstract: A process for preparing a shaped article made of hydrolyzed ethylene-vinyl acetate copolymer having an improved impact resistance by conditioning the shaped article to contain water within the range of 0.2 to 3.0 % by weight to the article. The impact resistance of the shaped article can be improved without losing the advantageous characteristics of the copolymer and the improved article can be suitably employed as engineering plastics.

Abstract: A method of extruding a coating or sheath onto an elongated support which comprises radially feeding the material into an inlet end of an extrusion head and decompressing, homogenizing, decompressing and compacting the material around a sleeve which surrounds the support. Then the material is expanded radially and then deposited in the form of a sheath on the elongated support. The plastic material flows under pressure and the sheath moves toward the exit pulling with it the elongated support on which it is deposited. In the final portion of the extrusion head the sheath is guided and pressed onto the support to form a homogeneous coating of predetermined thickness. The coated articles may have a tubular or rectangular profile or be in the form of ribbons, wires, or cables, and particularly coated cylinders which may be solid or hollow.

Abstract: In the manufacture of textile yarns from synthetic thermoplastic materials, such as polyamides, polyesters and polyolefins, e.g. polypropylene, a web or sheet of the material, which may be preformed or formed by extrusion or casting as a step in a continuous process, is subjected to "forging" as by a profiled roller to produce in the web or sheet parallel lines of weakness and then to such a drawing operation in a direction parallel to the lines of weakness that the web or sheet is stretched to many times its original length and, with or without assistance of other mechanical means, is thereby split into discrete, thin filaments suitable for textile yarns.

Abstract: Highly unusual and useful novel high-performance, oriented, lowcrystalline, essentially heterocyclic structures, e.g. films, are prepared from certain novel and important process sequences. These structures, e.g. films and fibers, possess a unique combination of minimal shrinkage at high temperatures, after orientation, coupled with negligible coefficent of expansion over an unusually wide temperature range.

Abstract: A process and apparatus for continuous production of molded sheets of a foamed thermoplastic synthetic resin, wherein a synthetic resin is fed into a screw extruder and a low boiling point liquid expanding agent is introduced under high pressure into the extruder and admixed with the resin in the extruder and thereafter the resulting admixture is extruded in the form of a plurality of foam filaments to insure proper distribution of the admixture to the nozzles of the extruder. A gear pump is provided for each nozzle. Also, to avoid collapsing of the foam means are provided for tempering the foam filaments by the application of heat.