Abstract: The invention relates to a method for the production of plastic molded skins which are built up by consecutively melting multiple plastics onto each other. The surface of the forming tool is partially covered with a covering or mask during the melting of a first plastic powder and the first plastic powder is applied to the forming tool by a powder spray method. Thereafter, the covering or mask is removed from the surface of the forming tool and the second plastic powder is applied to the surface of the forming tool and to the first plastic powder by rotation sintering.

Abstract: Various embodiments herein include utilities for generating embosser drums that are used to pre-format optical media such as optical tape with a pattern of nanostructures such as wobbled grooves. One utility includes generating a plurality of replicas from an embossing master, bonding the replicas together to form a bonded replica structure having a surface with the nanostructure pattern imprinted therein, creating a replica of the bonded replica structure and electroforming a metallic layer onto the bonded replica structure replica to create a single, one piece, metallic shim which can be used to create a weld-less embosser drum.

Abstract: Disclosed herein are compositions including a cross-linked polycarbonate. The cross-linked polycarbonate may be derived from a polycarbonate having about 0.5 mol % to about 5 mol % endcap groups derived from a monohydroxybenzophenone. A plaque including the composition can achieve a UL94 5VA rating. Also disclosed herein are articles including the compositions, methods of using the compositions, and processes for preparing the compositions.

Abstract: A method for forming a tubular sheet product roll includes providing a sheet product roll having a first configuration and a void, centering a rotational axis of the sheet product roll on a longitudinal axis of a first tool, and inserting the first tool into the void of the sheet product roll to define an inner diameter of the void and to form the sheet product roll having a second configuration different from the first configuration.

Abstract: A process for the manufacture of semi-plastic pharmaceutical unit doses using a rotary moulding machine and semi-plastic pharmaceutical dosage units obtained by this process.

Abstract: A method to form a multiple walled enclosure with low permeation properties and rugged impact resistance useful as a fuel tank or chemical container. The enclosure is made by rotomolding a first charge of thermosetting polymer into an outer layer, then rotomolding a charge of EVOH or other low permeation thermoplastic into a second layer, then rotomolding a second charge of thermosetting polymer into a third layer so that the low permeation thermoplastic layer is fully enclosed by layers of thermoset polymer. The preferred thermosetting polymer is crosslinkable polyethylene and the preferred low permeation thermoplastic is EVOH.

Abstract: The present invention relates to a composition that can be used to manufacture an impermeable, sealing, tight envelope, to a process for manufacturing an impermeable envelope, and to a tank. The composition of the invention comprises in % by weight relative to the total weight of the composition: from 70 to 90% of a monomer (I); from 0.1 to 1% of an activator (II), in which R is chosen from the group comprising CnH2n+2, n being an integer chosen from 1 to 10; —OH; —OCnH2n+2, n being an integer chosen from 1 to 10; and —NHR? where R? is either CnH2n+2, n being an integer chosen from 1 to 10, or an amine functional group; from 2 to 6% of a catalyst (III), in which X is chosen from the group comprising MgBr, MgI, Li and Na; and from 10 to 20% of an additive (IV), with: This composition can be used, for example, to manufacture elements that are impermeable to fluids, for example impermeable envelopes, for example that can be used in the manufacture of type IV tanks or hydraulic accumulators.

Abstract: The present invention discloses a single layer rotomoulded article prepared from a blend of polyethylene, functionalized polyolefin and one or more resins selected from polyetherester or saturated polyester or polycarbonate or polyamide.

Abstract: Embodiments relate generally to plastic wall panels. Wall panels are formed by rotational molding processes and may be used in sound attenuation barriers or other wall or building structures. Some embodiments include reinforcing structure. The reinforcing structure may be configured to effectively support a plastic shell of the wall panel in a way that allows some relative movement between the plastic shell and the reinforcing structure.

Abstract: The present invention provides a method and apparatus for surface relief output coupling in organic light emitting diodes is provided. The method includes forming a pattern in a surface of an elastomer (310) and laminating at least a portion of the pattern to a surface of an organic light emitting diode (305).

Abstract: A thermoplastic elastomer compound of an acrylic-containing styrenic block copolymer and plasticizer oil have been found to be capable of sintering at a temperature ranging from about 180 C to about 200 C when the copolymer and the oil are in no more than a 2:1 weight ratio. The compound can be used in rotomolding or slush-molding equipment to make plastic articles having elastomeric properties.

Abstract: A twisting apparatus is described. The twisting apparatus has a loading device adapted to load a food product inside a casing and a braking device. A filling assembly is adapted to support the casing. An inlet conduit is provided for feeding the food product into the filling assembly. The inlet conduit is structurally separate from the passage duct of the filling assembly and configured to assume at least one first operative position in which the filling assembly is connected to the braking device and the inlet conduit is in fluid communication with said passage duct and a second operative position in which the filling assembly is displaced in a spaced relationship or detached from the braking device.

Abstract: A twisting apparatus is disclosed. The twisting apparatus has a path for loading a food product extending from a loading device to a braking device. The loading device has a tubular filling body or filling cone adapted to assume at least one position in which the filling cone is in a spaced relationship or is detached from the braking device.

Abstract: Method of manufacturing a large-scale shell construction, wherein a form is sprayed with a setting construction material, such as concrete. The method comprises rotating the form about a rotation axis while applying said construction material. Preferably it also comprises suspending the form from above in a point through which the rotation axis runs. Furthermore, the method can comprise floating the form on a body of water.

Abstract: This invention relates to the field of multilayer articles prepared by rotational molding with a robotized rotomolding machine wherein the mold is under direct heating.

Abstract: A method of making a mechanical fastening net. The method includes providing a net having strands of polymer and open areas between the strands of polymer and molding a portion of the polymer in the strands of the net into upstanding posts to form the mechanical fastening net. A mechanical fastening net that includes a polymeric backing, a plurality of openings in the polymeric backing, and upstanding posts on at least one of the first or second major surface of the polymeric backing is also disclosed. The polymeric backing has a range of thicknesses ranging from minimum to maximum thickness, and for at least a portion of the polymeric backing, the minimum thickness of the polymeric backing is where it abuts one of the openings.

Abstract: Thickness gradients in large, cobonded composite structures resulting from gravity-induced resin migration during curing is substantially reduced by rotating the structure during the resin infusion and curing stages. The layup for the structure is placed on a rotatable tool fixture and vacuum bagged. The tool fixture is mounted on a central support tube provided with motors for rotating the tool fixture about the axis of the tube. The tube has internal passageways that deliver resin to the bagged layup and carry away excess resin from the layup using vacuum pressure. The resulting composite structures exhibit thickness gradients less than 10%.

Abstract: Disclosed is an apparatus and method for producing frac sand, in order to meet size, sphericity and roundness standards, from a feedstock such as natural sand. The feedstock is rotated as slurry in a conditioning cell, so that it self abrades to produce frac sand with the required characteristics.

Abstract: Molding methods and molds for making a synthetic resin molded product include disposing a curable liquid resin mixture in a recess of a female mold. The curable liquid resin mixture is then simultaneously agitated and degassed by a mixer while under a partial vacuum. More specifically, at least the female mold is orbited around an orbital axis while being rotated about a rotational axis that is eccentric to the orbital axis. After being thoroughly mixed and degassed, the liquid mixture is then cured in the mold unit.

Abstract: An elastomeric prosthetic breast implant is provided having a shell and a patch forming a flush interface with the shell and no sudden surface steps on both interior and exterior surfaces of the shell.

Abstract: A tampon applicator barrel including a cardboard tube having a first end and a second end and at least one gripping structure defined from the cardboard tube proximate the second end is provided. The cardboard tube has a wall thickness of between about 0.015 and about 0.020 inches, while the gripping structure has a height of up to about 0.035 inches.

Abstract: A spray system and method of using such spray system to fabricate a polymer membrane structure for use as a vascular graft or tissue engineered scaffold is provided. Generally, this spray system includes the use of at least two spray apparatus to apply different polymer and solvent mixtures to the outer surface of a mandrel to form a blended layer. Upon curing of the blended layer, phase separation occurs leading to the formation of a polymer membrane structure having variable properties along at least a portion of its longitudinal axis.

Abstract: A method and system for forming a product including a layer of fiber to a surface of a mold is provided. The system includes a mold and an apparatus. The mold is configured to rotate about an axis of rotation. An apparatus includes a base and a head coupled to the base. The base is configured to rotate about the axis of rotation. The head is configured to apply the fiber to the surface of the mold to form the product. The product includes at least one layer including at least one fiber applied using centrifugal force.

Abstract: The invention relates to a winding shaft for winding a continuous flexible material web into a roll. The winding shaft has means in order to adjust the diameter of the winding shaft surface to be wound between a reduced-diameter unused position and an expanded operating position, and the winding surface in the expanded position is formed jointlessly with a uniform curvature and is supported inward against the operational pressure around said winding surface in a dimensionally stable manner that is substantially uniform. A roll can thereby be wound without disruptions and then stored without a casing until the roll “dies”, said roll remaining stable during storage and not forming any disrupted zones on the inner face of the roll.

Abstract: A bead-forming apparatus and method for its use are described. The bead-forming apparatus includes a base with a pair of legs extending from a top surface. First ends of the legs couple to respective eccentric elements. The eccentric elements removeably and rotatably couple to a platen. Second ends of the legs are rotatably and slideably mated with a gear train disposed within the base. The legs are slideably translatable into the base and the gear train maintains a rotational orientation of the legs and the eccentric elements coupled thereto. The platen is thus moveable through a circular path defined by the rotation of the eccentric elements and legs. As such, a plug of moldable material placed between the base and the platen and in contact with the platen, is formed into a double-cone shape by movement of the platen through the circular path.

Abstract: Systems and cold rotational molding methods are provided for making hollow, foam-backed polymeric molded articles. The molded articles can be manikins or manikin parts, or other articles, such as frames (e.g. for mirrors and pictures), urns, fixtures, furniture, display props, and garden furniture, made of a thermosetting elastomeric material. The articles are more structurally rigid than previous molded articles utilizing the same amount of polymer material, lighter in weight than previous molded articles having the same structural rigidity, and more resistant to deformation under temperatures up to 180 to 185° F. The process of making a molded manikin part, from the first injection of polymer into the mold until demolding of the finished part, can be completed in as short a time as 18 minutes without the necessity for cradling of the demolded part, even when the part requires one or more flat surfaces.

Abstract: The invention relates to a device for producing a toroid-shaped fiber composite product. The device comprises at least two fiber or fiber composite material dispensing units (2, 3), the dispensing units being adapted to place a fiber (4) or a fiber composite material onto the surface of a toroid-shaped mandrel (5); positioning means to effectuate relative movement of the mandrel and the dispensing units during placement of the fiber or fiber composite material. The invention further relates to a method for producing a toroid-shaped fiber composite product, preferably with a concave cross-section, in particular the rim of a bicycle wheel. The method comprises providing a toroid-shaped mandrel, dispensing fibers or fiber composite material from at least two dispensing units, placing the fibers or fiber composite material onto the mandrel while effectuating a relative movement of the mandrel and the dispensing units, and reshaping at least part of the mandrel, preferably by thermoforming.

Abstract: A polymer having a density of from about 0.94 g/cm3 to about 0.96 g/cm3 and a primary structure parameter 2 (PSP2 value) of greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of equal to or greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A. A polymer having at least one lower molecular weight component and at least one higher molecular weight component and having a PSP2 value of equal to or greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A.

Abstract: The instant invention provides rotational molded articles, and method of making the same. The rotational molded articles according to the present invention comprise a polyethylene composition comprising: (a) at least 85 percent by weight of the units derived from ethylene; and (b) less than 15 percent by weight of units derived from one or more ?-olefin comonomers; wherein the polyethylene composition has a density in the range of 0.930 to 0.945 g/cm3, a molecular weight distribution (Mw/Mn) in the range of 1.70 to 3.50, a melt index (I2) in the range of 0.5 to 20 g/10 minutes, a molecular weight distribution (Mz/Mw) in the range of less than 2.5, vinyl unsaturation of less than 0.06 vinyls per one thousand carbon atoms present in the backbone of the polyethylene composition.

Abstract: A method of forming a simulated combustible fuel element including covering at least a part of a surface of a master with a material selected to produce a mold, and then removing the master from the mold. A predetermined amount of a liquefied body material that is less than a volume of the mold is introduced into the mold. A body including the body material is produced with one or more cavities therein and an exterior surface simulating at least the part of the surface of the master. The body material is allowed to solidify, at least to the extent that the body material is self-supporting, and the mold and the body are separated. One or more fuel light sources are positioned to direct light therefrom in the cavity. At least a portion of the exterior surface is coated so that the portion simulates a combustible fuel element.

Abstract: A windscreen wiper device is provided. The windscreen wiper device includes an elongated wiper strip of a flexible material for sealing against the windshield and at least one elongated groove. At least one flexible and elongated carrier element is disposed in the at least one groove of the wiper strip for biasing the wiper strip into a predetermined configuration when in a relaxed state. The at least one carrier element presents at least one upwardly facing curve and at least one downwardly facing curve when in a relaxed state.

Abstract: A nanocomposite material apparatus suitable for fabricating a nanocomposite material from different materials is provided. The nanocomposite material apparatus includes an acceleration inner tube and a collection outer tube. The acceleration inner tube disposed along a rotation axis has a top surface, a bottom surface and an outer peripheral surface. Pipes for accelerating different materials is distributed within the acceleration inner tube. Each pipe includes an inlet, an outlet opening at the outer peripheral surface and a spiral trench connecting the inlet and the outlet. Nano materials having electricity are emitted from the corresponding outlets by accelerating different materials within the corresponding pipes.

Abstract: An apparatus for molding an article. The apparatus includes a mold and a mold plate slidable between a first position and a second position within the mold. In the first position the mold plate creates an undercut feature in a molded article in the second position the molded article with the undercut feature may be easily removed from the mold without damaging the mold or the article.

Abstract: A transfer layer on a surface of a mold has a thickness distribution along the radius direction that the layer is thick in an inner round portion but is gradually thinner toward an outer round portion. An adhesive layer is formed between a surface of a signal substrate which bears a signal recording film and the mold which seats the transfer layer. The adhesive layer has a thickness distribution that the layer is thin in an inner round portion but is gradually thicker toward an outer round portion. Since the thickness distributions along the radius direction of the transfer layer and the adhesive layer are opposite to each other, the thickness distribution of an isolation layer which comprises the two layers is uniform.

Abstract: A part made of a composite is intended to be subjected, through at least a point of attachment and in cooperation with connectors, to tensile and/or compressive forces. The part includes a monolithic part having a winding of fibers oriented and embedded in a matrix, and a tubular body, wherein an attachment point, based at one end of said tubular body takes the form of a strap forming a loop turning about an axis perpendicular to the axis of the tubular body, and wherein an internal wall and/or the external wall of the loop is designed to cooperate with a portion of the connector in tension and/or in compression along one or more directions.

Abstract: A mould assembly includes a first mould part with a first mould opening and a second mould part with a second mould opening. The first mould part and the second mould part are separate parts. A rotating device rotates the second mould part from a position in which the second mould opening faces upwards to a position in which the second mould opening faces downwards. A moving device moves the first mould part and/or the second mould part relative to each other such that the second mould part is located above the first mould part. A closing device moves the first mould part and the second mould part towards each other with the first and second mould openings facing each other until the first and second mould parts engage. Further, a method of closing a mould assembly is provided.

Abstract: The present invention provides a method for preparing poly(allylamine) hydrochloride, sevelamer hydrochloride, sevelamer carbonate and colesevelam hydrochloride. The present invention also relates to a process for preparing oly(allylamine) hydrochloride, sevelamer hydrochloride, sevelamer carbonate and colesevelam hydrochloride with low allylamine content and high specific gravity.

Abstract: A method for forming a tail fin of wind turbine includes first pouring a proper amount of molten plastic into a mold having a cavity showing a contour of the tail fin and the mold is rotated to induce a centrifugal force that makes the plastic uniformly sticking to an inside surface of the cavity to form a tail fin that shows an aerodynamic feature of a one-piece hollow shell. The tail fin, when mounted to the wind turbine, realizes efficient and stable control of rotor blades at a front end of the nacelle in alignment with windward direction so as to improve the use of wind power and make the tail fin and the rotor blades in a weight balanced condition to thereby reduce the load applied to a yaw bearing located under the nacelle and extend the service life of the bearing.

Abstract: The invention provides a method of manufacturing a polymeric implantable medical device using gel extrusion of high molecular weight polymers or charge-induced orientation to avoid heat degradation of the polymer that might occur during conventional heat extrusion.

Abstract: A stone based copolymer substrate includes calcium carbonate (CaCO3) from approximately fifty to eighty-five percent (50-85%) by weight and varying in size generally from 1.0 to 3.0 microns, high-density polyethylene (HDPE) from approximately two to twenty-five percent (2-25%) by weight and a biopolymer from approximately two to twenty-five percent (2-25%) by weight. The substrate may include a biodegradation additive from approximately three fourths of a percent to two percent (0.75-2%) by weight. By selectively adjusting the ranges of the substrate's components, various products can be made to replace current tree-based and plastic-based products. The substrate can be configured to be tear proof, water proof, fade resistant and fire retardant while utilizing less energy and producing less waste during its manufacture. In an exemplary embodiment of the invention, the stone used in the substrate includes limestone.

Abstract: The present invention discloses the use in rotomolding or slush molding applications of a composition comprising a polyolefin, a processing aid and optionally a UV-stabilizer.

Abstract: Described herein is a method forming a belt suitable for use with an image forming system. The method includes coating a composition of a polyimide, a phosphate ester and a solvent onto an outer surface of a rotating metal belt, and subsequently curing and releasing the composition from the metal belt.

Abstract: A method for manufacturing a tubular body, includes: attaching a first member to an outer or inner peripheral surface of one end in an axial direction of a cylindrical core, along a circumferential direction of the peripheral surface thereof; applying a first resin solution on the peripheral surface, to cover it and the peripheral surface of one end of the first member closer to the center of the core, and to form a coating (first coat film); attaching a second member to the peripheral surface of the end of the first coat film on the side where the first member has been attached; applying a second resin solution on the peripheral surface of the first coat film, to cover it and the peripheral surface of the end of the second member closer to the center, and to form a coating (second coat film); peeling off the first and second members.

Abstract: Tubular ceramic structures of non-circular cross section, e.g., anode components of tubular fuel cells of non-circular cross section, are manufactured by applying ceramic-forming composition to the external non-circular surface of the heat shrinkable polymeric tubular mandrel component of a rotating mandrel-spindle assembly, removing the spindle from said assembly after a predetermined thickness of tubular ceramic structure of non-circular cross section has been built up on the mandrel and thereafter heat shrinking the mandrel to cause the mandrel to separate from the tubular ceramic structure of non-circular cross section.

Abstract: The invention relates to a method for producing an out of tool molded skin (1) with an embedded flat electroluminescent element, wherein an outer function or carrier layer of the electroluminescent element (5, 6, 7, 8) is made of plastic material that is substantially identical to the powdered plastic material of the molded skin and is applied to the not yet fully cured and cooled molded skin.

Abstract: The present invention discloses the use in rotomolding or slush molding applications of a composition comprising a polyolefin, a processing aid and optionally a UV-stabilizer.

Abstract: A method of forming a simulated combustible fuel element for simulating a semi-burned combustible fuel element, including, first, covering a surface of the semi-burned combustible fuel element with a material selected to produce a resiliently flexible mold, and second, after the selected material has set, removing the semi-burned combustible fuel element from the mold. Next, a predetermined amount of liquefied body material is introduced into the mold, and a body is produced resembling the semi-burned combustible fuel element with one or more cavities therein and an exterior surface simulating the surface of the semi-burned combustible fuel element, the body including one or more light passages. After the body material is cured, the mold is removed from the body.

Abstract: The present invention relates to a process for the production of polyethylene hollow articles, which process comprises charging the polyethylene with one or more NO-acyl hindered amine additives containing one or more groups of formula (I), filling this mixture into a mold, heating this mold in an oven to above 280° C., such that the additized polyethylene melts, rotating the mold around at least 2 axes, the additized polyethylene spreading to the walls, cooling the mold while still rotating, opening it, and taking the resultant hollow article out, where the group of formula (I) is where Ra is a monoacyl or diacyl radical; R1-R4 are each C1-C6alkyl; and R5 and R6 are each, independently of one another, hydrogen, C1-C6alkyl or C6-C10aryl; or R5 and R6 are together oxygen.

Abstract: The invention relates to a vehicle (1) including a user seat comprising a backrest (3), a seat portion (4) and lateral edges (5) provided on both sides of the seat portion. The vehicle has a reduced production cost and a structure that facilitates the adaptation thereof to a plurality of activities, in particular owing to the fact that the seat, which is made from plastic, is produced in the form of a single piece, the lateral edges (5) being extended downwards such as to form two rear conduits intended to receive at least one rear movement member (26, 27, 28). The invention also relates to a vehicle production method in which rotational moulding is used to form an ergonomic seat.

Abstract: A method for operating a rotary press, comprising a rotor rotatably driven about a vertical axis that has a die-plate and upper and lower rams which, while being guided vertically in guides of the rotor, interact with holes of dies in the die-plate wherein at least one compression station is provided and has an upper and a lower pressing roller past which the presser rams run along and by which they are moved towards the die-bore for the purpose of compacting the material in the die-hole, wherein the upper and lower rams are lifted subsequent to the compression procedure, causing the lower ram to eject a compact from the die and the compact to be stripped by a stripper in the direction of a discharge chute, characterized in that while an compact ejection procedure is under way the upper ram stands upright on top of the compact and is lifted therewith and the stripper seizes the compact laterally while the upper ram is still standing upright on top of the compact.