Abstract: A process for producing a high modulus article includes forcing a high molecular weight plastic material, such as polyethylene, through a passage of which the cross-sectional area diminishes in the forward direction of plastic flow, thus producing an extrudate. The plastic material is extruded while it is close to or at its melt temperature, and it is lubricated to obtain substantially plug flow through the passage. The speed at which the plastic material flows through the passage is adjusted so that the elongational velocity gradient at any longitudinal position within the passage does not exceed about 2.6 sec..sup.-1, thus minimizing the degree of molecular orientation in the extrudate. The extrudate can be deformed by drawing while it is maintained at or close to its melt temperature, thus producing an oriented, deformed extrudate. The oriented extrudate is then quickly cooled to preserve the orientation.

Abstract: Yarns are prepared by spinning PEN or other semi-crystalline polyester polymers made from similarly rigid monomer combinations to a state of optimum amorphous orientation and crystallinity. This is accomplished by selection of process parameters to form an undrawn polyester yarn of birefringence at least 0.030. The spun yarn is then hot drawn to a total draw ratio of between 1.5/1 and 6.0/1 with the resulting drawn semi-crystalline polyester yarn having Tg greater than 100.degree. C. and a melting point elevation at least 8.degree. C. The preferred yarn has a tenacity at least 6.5 g/d, dimensional stability (EASL+Shrinkage) of less than 5%, and shrinkage 4% or less. The resulting yarn exhibits surprisingly high modulus and tenacity together with low shrinkage when compared to prior art yarns.

Abstract: Production line and method for manufacturing strips of foil stabilized plastics moldings featuring a rotary reform machine that has a pair of reform wheels that are rotatably driven to profile the extrudate while matching the output speed of extrudate exiting from the extrusion die of a plastics extruder. The wheels have equal diameters and are motor driven at the same angular velocity so that forming dies in the wheels synchronize and cooperate to pressure mold spaced sections of the extrudate feeding therethrough to form high quality end corners with an offal section therebetween. A haul-off pulls the strip from the extruder die, the rotary reform machine, a water trough and flash trimmer and into a cutter where the offal is removed. The strip is maintained under a predetermined tension load by use of an adjustable friction brake on the stabilizer foil so that the heated plastics exiting the extruder will be uniform in initial profile, providing high quality extrudate feeding into the reforming wheels.

Abstract: A method and an apparatus for easily producing a double-sided surface fastener molded integrally in a simple process, which provides easy disengagement in spite of high engaging strength and high durability in repetitive use. A molten resin is extruded from an extrusion nozzle at the predetermined width and is introduced into a predetermined gap between upper and lower die rollers which are disposed up and down with the gap and are provided with a plurality of engaging element forming cavities on the respective peripheries and cooling means in the inner portions. The upper and lower die rollers are concurrently driven and rotated in the extrusion direction of the molten resin while filling the engaging element forming cavities with the molten resin, so that a plurality of hook elements are continuously molded integrally on the both front and back surfaces of a plate-like base portion and are cooled to the predetermined temperature.

Abstract: Methods and apparatus for generating, and then precisely controlling, layer thickness gradients in multilayered polymeric reflective bodies are provided. The creation of such gradients is useful in tailoring multilayer bodies to reflect and/or transmit desired wavelengths of light. Both thermal and mechanical methods, as well as combinations thereof, are used.

Abstract: An inflatable medical device for the delivery of medications to an organ in the body including a catheter having a plurality of lumens (13, 22, 28) disposed therein. The distal end of the catheter is adapted to be disposed within a bodily organ. A hollow, inflatable, medication-deliverable balloon (16) is disposed on the distal end of the catheter and the interior of the balloon (16) is in fluid flow relationship with one of the lumens (22) to enable the balloon (16) to be inflated. An array of conduits (40) is disposed within the walls of the balloon for the delivery of medications to predetermined locations within said bodily organ. Another lumen (28) in the catheter shaft (14) is provided to deliver medications to the conduits (40) in the wall of the balloon (16). An egress (17) for the medications is provided so that they may be dispensed at the site being treated.

Abstract: A washing method for a workpiece, a resin molded product and a manufacturing method for a resin molded product. There are three steps involved, a detergent washing step, a rinsing step and a drying step. In the detergent washing step there is an additional step in which the detergent water is separated into a condensed liquid and water vapor, the water vapor being discharged into the air. The apparatus used in the method consists of degreasing baths, and withdrawal baths for the detergent wash, a pure water bath for rinsing and a drying bath. The apparatus also has an air heating unit which supplies hot air to form the water vapor in the separation step of the detergent water.

Abstract: An extruded molding trim for vehicles, appliances and the like, which has a one piece integral construction including a longitudinally extending strip-like upper portion and longitudinally spaced apart leg portions extending perpendicularly downwardly therefrom either in a single or a double row, the portions having outwardly extending tabs disposed on opposite sides or on only one side thereof for attachment to a part of a vehicle, appliance and the like, the molding trim being formed from an extruded plastic strip. The upper portion and the leg portions are fabricated from either a rigid or a resilient flexible plastic material, with the tabs being fabricated from either a rigid or a resilient deformable or flexible plastic material.

Abstract: A stabilizer guide for guiding a stabilizer, having a material characteristic of fraying, through an extrusion die without fraying and melting the stabilizer during the extrusion of a thermoplastic body molding of a motor vehicle. The stabilizer guide is made up of two halves that join to form a parting line and a slot by which to guide the stabilizer through the extrusion die. The slot extends along the entire length of the stabilizer guide and is located in a different plane than the parting line of the stabilizer guide. By having the slot in a different plane than the parting line, the stabilizer is prohibited from wandering into the parting line. This prevents the stabilizer from fraying and shredding and causing the slot to be obstructed by pieces of the stabilizer. Obstruction of the slot hampers the stabilizer from being guided through the stabilizer guide.

Abstract: An apparatus (10) for extruding a profile material to form a profile (11) of substantially constant cross-section onto the peripheral edge (12) of an article (13). The apparatus (10) includes a movable die head (30) for circumferentially traversing the peripheral edge (12) of the article (13). The die head (30) has a profile orifice (31) positioned proximate to the peripheral edge (12) of the article (13), and a supply channel (50) in fluid communication with both the profile orifice (31) and a pressurized source of the profile material (24) for directing the profile material to the profile orifice (31). The apparatus also includes selectively pivotable vane means (60) positioned within the supply channel (50), wherein the vane means (60) is pivotable to variably direct the flow of the profile material to the profile orifice (31 ) as the die head (30) moves.

Abstract: A method for producing an extruded film article such as a bag, which is a blend of a thermoplastic polymer such as ethylene vinyl acetate and an olefinic oxide polymer such as poly(ethylene oxide), with a modifier such as liquid smoke absorbed in the blend. The modifier is transferable from the film to a receiving surface such as a food body in fluid transfer relationship with the film.

Abstract: An irregularly shaped weather strip having first and second weather strip sections integrally formed as a unit. Each of the weather strip sections includes a sealing portion and an engagement portion. The sealing portion and the engagement portion of each of the weather strip sections are formed of first and second molding materials, respectively. The sealing portion of the first weather strip section having a cross-sectional configuration different from that of the sealing portion of the second weather strip section. Such a weather strip is manufactured by extruding the first and second molding materials. The sealing portion of the second weather strip section is modified by blowing hot air at a portion of the first molding material.

Abstract: A continuous process for extrusion of thermoplastic resin of sheets, films, etc., is characterized by introducing devolatilized polymer melt into at least two branch streams, at least one of which is fed to an extrusion device and at least one of the remaining stream is connected to a pressure-adjusting device so as to obtain high quality extrusion products.

Abstract: A method for manufacturing calendered and/or extruded semifinished products with increased surface tackiness from a mixture of rubber and rubber-like plastic materials employs a shock-cooling step for cooling the hot semifinished products at a maximum shock cooling temperature of 0.degree. C.

Abstract: A method for producing powder mixtures capable of inducing an even more intimate, microhomogeneous intermixing in a heterogeneous powder composed of at least two types of powders. The method is effective even for the mixing of an aggregable powder and a nonaggregable powder. According to the method, a heterogeneous powder composed of at least two type of powders that have been preliminarily mixed by stirring is introduced into an inlet while a rotating axle is turning and is axially transported within a cylinder by a screw. As the heterogeneous powder passes between rotating disks and fixed disks, it is subjected to a highly efficient mixing by compression and shear forces due to a sliding-shear action exerted between depressions and elevations installed on the opposing surfaces of the rotating disks and fixed disks. The mixture passes in sequence through multiple stages of the rotating and fixed disks. A powder mixture, which has been microhomogeneously interdispersed, is discharged from the outlet.

Abstract: The invention relates to a method and an apparatus for the manufacture of high-pressure hose composed of a plastic core and a plurality of layers of helically wound plastic-resisting members formed in particular of plastic wires of high tensile strength which are rewound in a rewinding device from a supply reel onto several working spools, and optionally of an outer cover made of a plastic material. An intermediate layer of plastic yarn is disposed between every two helically wound pressure-resisting layers. After being unwound, the wires necessary for the helically wound pressure-resisting layers are precoiled over a hardened edge in the rewinding device and then wound onto the working spool in the stretched state. In accordance with the preferred embodiment, precoiling is done, not in a stranding machine, during hose production, but one stage earlier, in the rewinding device, where the individual wires are rewound from a supply reel onto so-called working spools.

Abstract: A thermoplastic pipe extrusion die having an adjustment section in a radial portion of the die channel provides excellent control of final pipe wall thickness uniformity.

Abstract: Pressurized colored liquids are inserted in the base mass, immediately upstream or in correspondence with the last homogenizing means; then a rotor arranged between the last perforated refining means and the extrusion hole, provides for a partial mixing of the paste. The speed of rotation of the rotor is adjustable from outside of the extrusion head, and independent of the speed of the extrusion screw.

Abstract: A fluid distribution device particularly useful as a drip irrigation emitter, comprises: a continuous plastic tube for conveying the fluid therethrough; and a plurality of individual plastic sleeves enclosing and fixed to the tube at longitudinally-spaced sections along the length of the tube; each of the sleeves being deformed to define a pressure-dropping fluid passageway between its inner surface and the outer surface of the section of the tube enclosed thereby; each of said tube sections having an inlet opening through the tube wall leading to the interior of the tube, and an outlet leading externally of the plastic sleeve.

Abstract: An aromatic polyimide film having excellent mechanical, thermal and electrical properties, is continuously produced by the steps of:preparing a dope solution having a rotation viscosity of 500-10.sup.5 poises at 100.degree. C. by uniformly dissolving aromatic polyimide in a solvent consisting of at least one phenol compound; extruding the dope solution through a T-die at 50.degree. C. or more, but at least 30.degree. C. below the boiling point of the solvent, under conditions which cause the apparent viscosity and shear stress of the dope solution to be 500-5.times.10.sup.4 poises and 10.sup.4 -10.sup.6 dyne.multidot.cm.sup.-2, respectively, to form a filmy stream of the dope solution; placing the filmy stream of the dope solution on a surface of a supporting means while heating the surface at a temperature of 50.degree. C.