Abstract: A novel process and novel apparatus for producing prestretched plastic film is presented. The method and apparatus are capable of forming a film from molten material and cooling the film to a non-molten condition so the film can be stretched. The cooled film is engaged and passed through a primary nip and second nip to plasticly and elastically stretch the cooled film to cold orient the film such that the film is stretched beyond the material's yield point. The cooled film is engaged with a plurality of idler rollers at a relatively low tension over a distance sufficient to allow the cooled film to relax to recover a major portion of its elastic deformation. Thereafter, the film is formed into a roll prior to being affixed to a unit.

Abstract: A method for making a hydropneumatic accumulator with a replaceable bladder for an active vehicle suspension comprising the steps chemically treating a resilient single layer bladder with a gas to provide imperviousness of a compressible gas through the bladder, bonding a spherical bumper to a closed end of the bladder, engaging an inward facing seal portion extending around an "open mouth" portion of the bladder with an external groove extending around a cylindrical cap to close off the "open mouth" portion, slideably mounting the cap and said bladder in the interior of an accumulator housing to divide the housing into a first sealed chamber for a hydraulic liquid and a second sealed chamber for a compressible gas; and engaging a detachable ring with a groove in the interior of the accumulator housing to retain the cover and the bladder in the housing.

Abstract: An improved extrusion apparatus includes an adjustable deckle and a flow channel in the deckle that makes possible extrusion of a composite stream, and in particular a side-by-side composite stream. Beneficially, an end plate of the apparatus includes an inwardly projecting portion disposed in precision sliding fit within the deckle channel. Also provided is a process for composite extrusion with width adjustment.

Abstract: For the production of extrudates such as profiles or granules, pulverulent or finely divided ultra-high molecular weight polyethylene is processed on single screw extruders. By the use of a screw with a specific geometry, thermal degradation of the polymer into low molecular weight products is avoided. Furthermore, profiles are obtained which have perfect surfaces, are free of voids and pores, and have no internal stresses.

Abstract: The invention relates to a method in connection with a process for insulating or sheathing conductors or the like, wherein plastic material is extruded into at least one layer on the surface of the conductor (1), and the conductor coated with the plastic material (2, 3, 4) is cooled in a predetermined manner. To avoid problems caused by the shrinking of the plastic material, after the cooling of the conductor (1) and the plastic material in vicinity to it to a predetermined level in the insulating or sheathing process, the surface layer of the plastic material and the plastic material portions in vicinity to it are reheated to a predetermined temperature in a pressurized space filled with a medium.

Abstract: An edging member for a window glass of an automobile door is provided with a plurality of contacting surfaces against which window glass is contacted. Each contacting surface is provided with a rough contacting layer respectively including a synthetic resin prepared by mixing large and small particles or grains of materials having different melting points, such as nylon, urethane, fluoro-resin and polyolefin resin, polystyrene resin and the like. The rough contacting layer is extruded simultaneously with the extrusion molding of the edging member.

Abstract: A method for forming an extruded weather strip having a trim portion and a lip having a thickened end portion.

Abstract: A method of manufacturing flexible thick-wall capillary tubing, comprising the steps of extruding a plastics sheath around a filament of uniform diameter, and withdrawing the filament from the sheath to form a length of tubing having a capillary bore which has been defined by the filament. The method enables the manufacture of fine-bore capillary tubing having a tightly controlled bore diameter.

Abstract: A method for blow molding a hollow body from thermoplastic material, including the steps of providing a blowing nozzle with a mechanical device for stirring. A thermoplastic parison is located within a mold. At least one pressurized gas is injected through the blowing nozzle and into a portion of the thermoplastic parison. A hollow body is formed. The hollow body contains the at least one pressurized gas. The mechanical device continuously stirs to forcible agitate the at least one pressurized gas contained within the hollow body.

Abstract: Apparatus and a method are disclosed for eliminating fiber distortions ("fiber swimming") and separations ("fiber fish eyes") via a premliminary step taken prior to consolidation of "green", fiber-reinforced metal matrix materials. The apparatus includes a first member for supporting the "green" metal matrix material pack, a second member to cover the "green" pack, the thermal coefficient of expansion of the first member being smaller than the thermal coefficient of expansion of the second member, the second member being secured to the first member atop the "green" pack to form a retort, and the entire retort being heated to an off-gassing temperature, where the second member bows outwardly away from the pack to relieve pressure from the pack.

Abstract: In the assembly of a windshield glass and a weather strip having a partly modified cross section the weather strip is extruded along the peripheral edge of the windshield glass and fixedly adhered thereto, a movable die 132 of a die assembly is properly moved so as to change the shape of an orifice of the die assembly.

Abstract: Porous pipe formed of particles of vulcanized rubber dispersed in a binder resin such as polyethylene are stabilized to reduce degradation by ultraviolet light by dispersing in the binder resin an effective amount of an ultraviolet stabilizer such as 0.1 to 10% by weight of carbon black.

Abstract: Thermoplastic articles, preferably of polycarbonate, are advantageously stabilized by selected bisbenzophenone UV absorbers concentrated in the outer surface or coating layers of the article prepared by coextrusion techniques.

Abstract: A method for producing a high strength multi-layered film excellent in heat resistance, shrinkability and stretchability and usable for wrapping of various articles which comprises at least five layers comprising a surface layer (S layer) mainly composed of at least one polymer selected from (A), (B), etc. and as inner layers at least one base layer (SBC layer) containing mainly a mixed composition comprising a combination such as (A)+(B)+(C), at least one core layer (H layer) containing mainly a polymer selected from (C), and at least one auxiliary layer (R layer) containing mainly at least one polymer selected from (A) and (B), with a proviso that when the R layer is placed-adjacent to the S layer, the R layer comprises the resin different from that of the S layer, said (A) being a low-density polyethylene or a copolymer of ethylene with a specific monomer, said (B) being a soft thermoplastic elastomer having a Vicat softening point of 80.degree. C.

Abstract: A process for preparing a pigmented thermoplastic polymer composition which is useful as a low profile additive composition for thermosetting resins comprises the steps of(A) selecting at least one thermoplastic polymer having a refractive index which is within about 0.06 units of the refractive index of the thermosetting resin;(B) preparing a mixture of said thermoplastic polymer and at least one color pigment, dye or mixture thereof under high shear in a high-intensity mixer; and(C) forming a slurry comprising said mixture obtained in step (B) in at least one liquid copolymerizable monomer containing at least one CH.sub.2 .dbd.C< group. In a preferred embodiment, at least one surfactant is included in the slurry obtained in step (C) in an amount sufficient to enhance the uniformity of the pigmentation of a cured composite produced from the thermosetting resin composition and a low profile additive composition.

Abstract: An edging member of a window glass for an automobile door is provided with a plurality of contacting portions to which the window glass is contacted. Each of the contacting portions is provided with a batten surface layer including a synthetic resin such as nylon, urethane and polyolefin resin, and powders or grains of mica, molybdenum and/or graphite mixed with the synthetic resin. A rough surface having projections and recesses is formed on the front surface of the batten surface layer by extruding the batten surface simultaneously with the extrusion molding of the edging member.

Abstract: A method is provided for forming an elongate body having thickness change, such as a car window molding. In the method, a vertical member is extruded into a fixed wall thickness and a fixed outline. A horizontal member is extruded into the same outline as that of the vertical member but has a smaller wall thickness than that of the vertical member. An apparatus is provided to perform the method. The apparatus has a slide core axially reciprocating in a bore of a die so as to change a shape of a forming space.

Abstract: The present invention is directed at polypropylene compositions containing a high level of filler, at a calendering process which uses the compositions to produce polypropylene films and sheets, and at the film or sheet produced from that process. The process of manufacturing polypropylene film involves formulating a polypropylene composition containing a resin, filler, matrix modifier, and processing aid. The resin comprises polypropylene resin ranging in concentration from about 100 to about 70 parts per hundred parts by weight of resin (PHR), and polyethylene resin ranging in concentration from about 0 to 30 PHR. The matrix modifier amounts to about 2 to 40 PHR. The filler ranges in concentration from about 0 to 450 PHR. The processing aid ranges in concentration for about 0 to 5.0 PHR. The composition is then mixed to obtain a homogeneous and plasticized mixture.

Abstract: A method of extruding a substantially uniform polymer composition made up of polyvinylchloride, a stabilizing additive composition and at least one of two additional constituents, one of which is a mineral filler and the other of which is a normally liquid plasticizer for the polyvinylchloride; the method is achieved while avoiding use of compounded PVC as a starting material and includes the steps of: (I) providing an extruder; (II) operating the rotors of the extruder for essentially synchronous rotation in a common direction while maintaining in the extruder cavity a temperature sufficient to plasticize the polyvinylchloride; (III) feeding particulate polyvinylchloride and the additive composition without substantial premixing of the polyvinylchloride and the additive composition into the cavity at the first inlet (e.g.

Abstract: A parison molding method and its apparatus in which at least two kinds of materials are used, and the layer formation and dispersion are uniform in the weld part and in the circumferential direction. In the parison molding method and its apparatus, molten resin at a weld part within a parison head is discharged out of the parison head by way of a flow control valve.