Abstract: A thermoplastic plastic granule having an expansion agent uniformly distributed within a plastic polymer-matrix and, containing additionally a cell-forming agent in a finely and uniformly distributed manner. Such thermoplastic granules are used for producing foamed molded bodies in a mold.

Abstract: A method for removing volatile substances from polyphenylene ether (PPE) resin blends in an extruder comprising adding a second thermoplastic resin downstream from the PPE feedport and one stage of water injection followed by vacuum venting is disclosed.

Abstract: Finely divided and free-flowing powders of a thermotropic polymer, e.g., a wholly aromatic polyester or a wholly aromatic polyesteramide, are produced by (a) extruding a melt of such thermotropic polymer through an extrusion apparatus including a downstream die member to provide at least one solid cylindrical profile thereof, during which extrusion (i) the molten thermotropic polymer is at a temperature T.sub.1 greater than the melting temperature T.sub.M thereof at which the liquid crystal phase develops, while (ii) cooling such molten thermotropic polymer no later than the instant of its inlet entry into the die member to a temperature T.sub.2 ranging from a value 7.degree. C. less than the temperature T.sub.M to a minimum value equal to the crystallization temperature T.sub.c thereof, and (iii) maintaining this temperature T.sub.

Abstract: A continuous process for the manufacture of a fibrous material from a polyolefin. The process comprises feeding a solution of polyolefin dissolved in an organic solvent at elevated temperature and pressure to a spinneret. The exit of the spinneret is the inlet to an elongated vertical tube and is located in an upper section of an elongated vertical vessel. The tube extends for a major portion of the length of the vessel. Solvent is removed from an upper section of the vessel and water is sprayed both down the tube and into the vessel. The strands thus formed are shredded in a self-cleaning self-feeding shredder located at the bottom of the vessel.

Abstract: The present invention includes apparatus for and a method of producing compacted particulate articles, as well as the compacted particulate articles made by that method. A particulate material mixed with a binder is introduced to and directed through a briquetting press wherein said particulate material is first sandwiched between polymer film, the sandwich formed in resilient polymer dies, then the polymer film is peeled off of the formed articles and collected while the formed articles are collected, accumulated and further processed.

Abstract: A method for extruding polyvinyl alcohol which includesadding sufficient energy to the polyvinyl alcohol to both melt it and essentially eliminate the crystallinity in the melt, andsimultaneously removing energy from the melt at a rate sufficient to avoid decomposition of the polyvinyl alcohol andrapidly cooling the extruded melt reduces the heat history and improves the resulting color of the extrudable polyvinyl alcohol.

Abstract: Processes for the production of mono- and multifilaments and also staple fibers of multifilaments based on polyarylene sulfides by melt spinning, multistage stretching and setting. As a result of the treatment by blowing of air onto the stabilized spun filaments in the first stretching stages at temperatures .ltoreq.100.degree. C., the chain molecules are oriented; the orientation and crystallinity required for high strengths is achieved by afterstretching at elevated temperature. The residence times in the first stage required for effective stretching can only be varied within relatively narrow limits in order subsequently to achieve the calculated orientations and effects. Overly long residence times at temperatures above 100.degree. C. result in elongation of the material with no additional orientation and hence with an inadequate increase in strength.

Abstract: A uniaxially drawn oriented polyolefin film for cable insulation, has a thickness of 80 to 250.mu. and is composed of a crystalline polyolefin having a melt index of 10 or more and 0.5 to 20 phr of unsintered polytetrafluoroethylene, wherein the added unsintered polytetrafluoroethylene is in the form of microfibrous particles uniformly dispersed in the crystalline polyolefin as a matrix so as to be parallel to the orientation axis of the polyolefin; an apparent MI value of the film is 1/4 to 1/10 of the MI value of the crystalline polyolefin used; the tensile Young's modulus of the film in the direction of the orientation axis is 2.times.10.sup.4 kg/cm.sup.2 or more; and the change in the thickness of the film in dodecylbenzene at 100.degree. C. is 10% or less. A method for manufacturing this film is also provided.

Abstract: A process for manufacturing expandable polystyrene pellets having a bulk density of about 36 lbs/cubic foot which upon expansion results in expanded articles having a bulk density of about 0.8 lbs/cubic foot and having substantiallly uniform cell formation is an interior portion thereof.

Abstract: Low odor polyphenylene ether/polystyrene resins are produced in a process by solution blending low odor polyphenylene ether and polystyrene resins and passing the solution through devolatilizers prior to recovery.

Abstract: Volatile substances in polyphenylene ether or polyphenylene ether/polystyrene compositions are substantially reduced by extruding the resins in a single pass using a plurality of stages including water injection and vacuum venting.

Abstract: A metallic, gold colored composition comprising an olefin polymer, a mica-based gold pigment, a mica-based bronze pigment, carbon black, and optionally, a yellow pigment is provided. Additionally, a process to produce a glossy, metallic, gold colored polyolefin product in a grit blasted mold is provided.

Abstract: A method for the preparation of masterbatch compositions for use in thermoplastic resin modification by blending polybutene with an ethylene..alpha.-olefin copolymer which is obtained by copolymerizing ethylene and .alpha.-olefin in the presence of specific catalysts and has specific characteristics such as a density of exceeding 0.910 g/cm.sup.3 and 0.940 g/cm.sup.3 or less, and successively by kneading and extruding the blend in the temperature range from the maximum peak temperature (Tm) to (Tm-45.degree. C.) in accordance with differential scanning calorimetry (DSC).

Abstract: Continuous strands of color concentrate are metered into the feed zone of a screw-melter polymer extruder where they are cut into pellets by the shearing action of the flights of a rotating screw against the extruder housing. These pellets are mixed within the extruder with a thermoplastic polymer to be colored and this mixture is then melted and extruded into a useful article, for example, a fiber for textile or carpeting end-use.Additionally, color concentrates can be first formed into continuous strands and stored conveniently on a spool for subsequent metering into the polymer extruder.

Abstract: A granular water treatment material and a process for the production thereof, the material being in the form of spherical granules, each having a thermoplastic polymeric matrix (1) and a more dense adjuvant in the form of micro-grains (3) dispersed in the matrix; each granule has on the surface a porosity in the form of micro-cavities (4) and cationic hydrophilic sites distributed on the surface; the process includes providing a mixture of an oxidizable thermoplastic resin and an adjuvant in powdered form, heating the mixture to make it plastic, extruding the plastic material to a diameter corresponding to the size of the granules to be obtained and cutting the extrusions to a length equal to this diameter, achieving a beading of the extruded pieces, oxidizing the surface of the spherical granules thus obtained, then ionically grafting a cationic polyelectrolyte to the surface of said granules.

Abstract: A method for coagulation of a polymer latex by feeding the polymer latex to an extruder having a base plate and a plurality of fine tubes fixed to said base plate and extending therefrom, said fine tubes being mutually spaced by at least 1 mm and protruding from said base plate by at least 3 mm, and discharging said polymer latex through said fine tubes into a coagulation solution to coagulate the latex.

Abstract: Preparing process for polyvinyl chloride material used for extrusion molding suitable to high speed extrusion includes a step of dry blending a blend prepared by blending polyvinyl chloride (polymer) compounded with plasticizers stabilizers and other auxiliary materials while controlling the temperature for the blend within a range from room temperature to 165.degree. C. and a step of kneading and pelletizing the blend after the dry blending step while controlling the temperature for the blend to lower than 165.degree. C. The polyvinyl chloride used is a suspension polymerizate capable of satisfying the condition that the retention ratio on 80 mesh screen (ASTM: E11-58T) is less than 1%.

Abstract: A tangled fibrous material from cut glass fibre bundles, with the cut glass fiber bundler being fed into a compressed air flow and a glass fibre-laden air being deflected into a turbulent eddy flow of varying direction, so that a tangled fibrous material of wadding-like consistency is formed. Through the simultaneous addition of dry polymer-based binder powder, it is possible to obtain a tangled fibrous material as a starting product for a production of glass fibre-reinforced plastic moundings, which can be compressed to a felt. This can be packed as an intermediate or further processed in a heated belt press to glass fibre-reinforced plastic plates.

Abstract: A uniaxially oriented, polyolefin film is prepared by melt blending a mixture of a polyolefin, an inert filler, a processing aid such as calcium stearate, and optionally a stabilizer, maintaining the moisture level in the melt blend below 700 ppm, casting a film, and uniaxially stretching the film at least about 2 times its original casting dimensions in one direction until the film has a sufficient number of elongated, narrow shaped, microporous voids in order to create a CO.sub.2 and O.sub.2 permeance in the range of 5,000 to 10,000,000 cc/100.sup.2 -atm-day. Such a film is used in a controlled atmosphere packaging container as a panel in a window for a controlled flow or flux of CO.sub.2 and O.sub.2 through its wall in an otherwise gas impermeable container.

Abstract: A process for the production of polyamide mouldings, characterized in that a polyamide melt is extruded through nozzles to form strands, which at a temperature of from 25.degree. C. below to the respective polyamide softing point in a ratio of from 1:1.5 to 1:8 are stretched and granulated, and the granulate is worked-up in a known manner to produce injection mouldings.

Abstract: A method of making activated carbon microspherules including kneading activated carbon particles of a size below 100 .mu.m, together with a dispersion of a water-insoluble synthetic resin to form an intimate mixture; pressing the mixture through a screen having holes related to the size of the desired microspherules; powdering the pressed material; and granulating and drying the resulting microspherules.

Abstract: A method of and an apparatus for producing compacted chopped strands having a high density, wherein flattened wetted chopped strands are prepared and subjected in the wetted state to a rolling action to change the flattened form into rounded rod-like form while being compacted. The chopped strands are conveyed horizontally along a vibrating carrier plate (44, 151, 151') so that the rolling action is imparted to the chopped strands during the convey. The chopped strands moving among the carrier plate (151, 151') is dried by heated air applied from the lower side of the chopped strands.

Abstract: Directly spinning highly oriented staple fibers of para-aramids using a dry-jet wet-spinning process in which the filaments in the gap between the spinneret and the coagulating fluid are attenuated with a liquid jetted symmetrically about the filaments at a rate sufficient to break the filaments intermittently to form staple length fibers that taper along their length from an enlarged head.

Abstract: High melt flow rate polymers are pelletized with greater uniformity and less malformed pellets from underwater extrusion process by die orifices having a narrow preland sufficient to evenly distribute the polymer followed by a wide final hole that forms a polymer strand sufficient to avoid deformation by water currents during pelletization.

Abstract: Method and apparatus are disclosed for producing various materials and products of a thermoplastic nature. In the method, thermoplastic material is subjected to a high intensity mixing and melting step to form a material which is a non-flowable and self-sustaining mass, having a temperature low enough to prevent it from being readily flowable, in a subsequent step, the method involves placing the material between a fixed rigid surface and a moving rigid surface to force air from the mass and to densify, compress and convert it to a flowable form whereafter it is passed through a restricted opening. There is provided a combination of a high intensity mixer and melter in which the product produced is then fed into a gear-pump where the material is passed between a fixed rigid surface and a moving surface.

Abstract: Pellets which are formed by extruding and cutting may be squashed in the latter operation. Squashing is reduced by passing a strand of extruded material downwardly under the influence of gravity and cutting the strand horizontally with a blade, preferably supporting the strand against the cutting blade by blowing gas against it when cutting.

Abstract: This invention relates to a process for the production of high strength polybenzimidazole filaments and molded products made from such filaments. The filaments produced by this process contain from about 10 to about 50 percent by weight residual solvent and can be heated at a temperature of about 350.degree. C. to about 600.degree. C. to produce three-dimensional foamed articles.

Abstract: A particle display comprises a plurality of particles which in an electrical field rotate to expose either their white or black surface depending upon the polarity of the field. The particle display can be used for a flat panel ambient-illuminated numeric, alpha-numeric and other forms of visual displays.

Abstract: A method and apparatus for making a charge used in molding a fiber reinforced part. Continuous strands of fibers are impregnated with resin and then cut into segments of predetermined lengths. The segments are collected so that the resin impregnated fiber segments are piled together to form the charge. In one embodiment, the fibers are collected in a controlled manner to provide preselected fiber orientation for the molded part. Also a cutter mechanism is provided for cutting resin impregnated fiber strands pulled over a first rotating drum.

Abstract: A process for preparing composite films comprising at least one layer of a first plastic polymer and a substrate of a second polymer/first plastic polymer composition by intimately mixing about 15 to about 90 wt. % of first plastic polymer and about 10 to 85 wt. % of the second polymer, extruding the mixture through a film die while cooling at least one surface of the die outlet at least about 10.degree. C. below the melting point of the plastic polymer and cooling the film. In a preferred embodiment the first plastic polymer has a semi-crystalline or crystalline melting point which is at least 10.degree. C. above the softening or melting point of the second polymer.A sandwich type laminate comprising two outer skins of first plastic polymer enclosing a core comprising a blend of first plastic polymer and second polymer can be prepared by cooling both die outlet surfaces. Where a blown film die is utilized the inner and outer die layers must be cooled to accomplish this end.

Abstract: The homogeneity of highly reactive polycondensates is improved in a process involving batch operations in a reactor, followed by extrusion and then cooling by a coolant to the point of solidification after which the polycondensates are milled and removed. The cooling is carried out with a low-boiling liquified gas.

Abstract: This granular composite is obtained by chopping granules from a composite strand which contains at least one bundle of gear crimped fibers embedded in a polymer. The fibers can have reinforcing or electrically conductive properties. The granular composite is mixed with another polymer granulate and softened, whereby the fibers are dispersed in the polymer mass, which is then shaped, for example, by injection molding into plastic articles.

Abstract: Pellets of a chlorinated vinyl chloride resin composition comprising inorganic materials, a solvent and a blowing agent; a pre-expanded particle of a chlorinated vinyl chloride resin comprising inorganic materials and a solvent and a process for preparing the pre-expanded particle of the chlorinated vinyl chloride resin containing inorganic materials which comprises kneading a chlorinated vinyl chloride resin, inorganic materials and a solvent, pelletizing the kneaded mixture impregnating a physical blowing agent into the resulting pellets and pre-expanding the pellets. The present invention makes it possible to be contained a large amount of inorganic materials in a chlorinated vinyl chloride resin by forming a uniform gel phase of the chlorinated vinyl chloride resin and the solvent and wrapping inorganic materials in the gel phase. A foamed article produced by employing pre-expanded particles of the chlorinated vinyl chloride resin containing inorganic materials has an excellent heat resistance, i.e.

Abstract: Pellets of a chlorinated vinyl chloride resin composition comprising inorganic materials, a solvent and a blowing agent; a pre-expanded particle of a chlorinated vinyl chloride resin comprising inorganic materials and a solvent and a process for preparing the pre-expanded particle of the chlorinated vinyl chloride resin containing inorganic materials which comprises kneading a chlorinated vinyl chloride resin, inorganic materials and a solvent, pelletizing the kneaded mixture, impregnating a physical blowing agent into the resulting pellets and pre-expanding the pellets. The present invention makes it possible to be contained a large amount of inorganic materials in a chlorinated vinyl chloride resin by forming a uniform gel phase of the chlorinated vinyl chloride resin and the solvent and wrapping inorganic materials in the gel phase. A foamed article produced by employing pre-expanded particles of the chlorinated vinyl chloride resin containing inorganic materials has an excellent heat resistance, i.e.

Abstract: A method of making a filamentary structure comprising a spiral thermoplastic core filament disposed within a thermoplastic sheath component is provided. The method involves extruding together from an extrusion die filaments forming the core filament and the sheath component, with the core filament being extruded at a faster rate than the sheath component which causes the core filament to spiral, and cooling the extrudates to form a unitary structure. A plurality of the filamentary structures may be extruded side-by-side so that their sheath components are joined together to form a fabric structure.

Abstract: In order to compound organic materials which are crystalline under standard conditions, these materials, in the pulverulent and/or molten state, are processed in a self-purging, twin-screw extruder in which the screws rotate in the same direction, ejected through one or more narrow passages into a low pressure zone, cooled and comminuted to give particles. In order to improve the pourability and shelf life, the materials are completely crystallized by the time they reach the end of the screws, and are heated during discharge through the narrow passage, in order to form a melt film. Dust-free granules havig a smooth surface can be produced in this manner.

Abstract: Pellets of a chlorinated vinyl chloride resin composition comprising inorganic materials, a solvent and a blowing agent; a pre-expanded particle of a chlorinated vinyl chloride resin comprising inorganic materials and a solvent and a process for preparing the pre-expanded particle of the chlorinated vinyl chloride resin containing inorganic materials which comprises kneading a chlorinated vinyl chloride resin, inorganic materials and a solvent, pelletizing the kneaded mixture, impregnating a physical blowing agent into the resulting pellets and pre-expanding the pellets. The present invention makes it possible to be contained a large amount of inorganic materials in a chlorinated vinyl chloride resin by forming a uniform gel phase of the chlorinated vinyl chloride resin and the solvent and wrapping inorganic materials in the gel phase. A foamed article produced by employing pre-expanded particles of the chlorinated vinyl chloride resin containing inorganic materials has an excellent heat resistance, i.e.

Abstract: A process for preparing improved pellets of a hydrolyzed ethylene-vinyl acetate copolymer which comprises extruding a methanol or a water-methanol solution including a hydrolyzed ethylene-vinyl acetate copolymer and a lubricant into a coagulating liquid in the form of a strand and cutting the strand into pellets. According to the process of the present invention, the molding processability can be improved without damaging the properties of the molded articles.

Abstract: The method of the present invention includes mixing a low viscosity thermoset resin and microspheres together without melting the thermoset resin and extruding the mixture to form a continuous strand of paste-like uncured material. The continuous strand is gelled on a conveyor which preferably includes a radiant heater or other means for accelerating the gelling of the continuous strands into solid form. The strands are then cut or chopped into pellet form and may be coated with an adhesive or B-staged material in preparation for forming into structural reinforcements. The pellets are filled with microspheres in the amount of 20 to 35% of resin weight. The pellets may include unexpanded thermally expandable microspheres which permit expansion of the pellets when exposed to heat to provide a pellet having a bulk density as low as 9 pounds per cubic foot.

Abstract: The present invention relates to a process for the production of thermoplastic polycarbonate injection-moulded shaped articles from polycarbonate melt strands, which is characterized in that polycarbonate melt strands are pressed through a circular orifice with a diameter of 1 to 8 mm, preferably 2 to 6 mm, and are then cooled to below their softening point, stretched in a ratio of between 1:1.5 and 1:8, preferably between 1:1.5 and 1:5, between room temperature and the softening point of the resulting polycarbonate strand, and are then granulated, and the resulting polycarbonate granules are processed in a known manner by the injection-moulding process at product temperatures of below 320.degree. C. preferably below 300.degree. C.

Abstract: A process is provided for removing volatile materials from a molten oxymethylene polymer, according to which the molten polymer is passed through a rotating disk polymer processor having at least three stages; a first devolatilization stage, then a stabilization stage and then a second devolatilization stage. The molten polymer in the first devolatilization stage is maintained at a temperature above its melting point in the temperature range of from about 160.degree. C. to about 220.degree. C. and at a vapor space pressure of from about 0.1 to about 300 Torr. The polymer in the stabilization stage is maintained in the molten state at a temperature of from 160.degree. C. to about 220.degree. C. The polymer in the second devolatilization stage is maintained in the molten state at a temperature of from about 160.degree. C. to about 190.degree. C. and at a vapor space pressure of from about 0.1 to about 100 Torr.

Abstract: Described for use as a key ingredient in an animal control composition and more particularly in an animal repellent composition, is the genus of steroids defined according to the structure: ##STR1## wherein X completes a substituted cyclopentyl moiety and is one of the moieties: ##STR2## wherein Y represents methylene, carbinol or keto; and wherein Z completes a substituted cyclohexyl moiety and is one of the moieties:hydroxycyclohexyl;ketocyclohexyl;ketocyclohexenyl;hydroxyphenyl;cyclohexenyl; orbicyclohexyland wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond.Also described are animal control articles consisting of one or more members of the above mentioned steroid genus and imbedded in a compatible polymer.

Abstract: A method of formulating a synthetic drug for use in animal feed, for the purpose of reducing carry-over of the synthetic drug to subsequent lots of animal feed in the feed mill.

Abstract: The present invention relates to articles, particularly plate or sheet-like articles made of plastic in which very low contents of fine electrically conductive fibers are uniformly dispersed so as to make the articles conductive. It also relates to specific intermediate plastic products, referred to as grains, threads and granules, and the processes for manufacturing each of these products as well as the final conductive articles. The articles can be used as a suitable shielding against radio-frequency and high-frequency electromagnetic radiation or as antistatic plastic articles.

Abstract: Damage to the natural tone of acrylic fibres, produced according to a continuous dry spinning process, can be avoided if from 0.025 to 0.2% by weight of ethylene diamine tetra-acetic acid, based on the fibrous solids material, is added to the spinning solution.

Abstract: Disclosed herein is a process for treating scrap thermoplastic film which has been treated with a saran coating. When the scrap film is cut into a convenient size, it is densified in the presence of a treatment medium which comprises a mixture of lime and an alkyl carboxylate and molded into pellet form. These pellets may then be employed in conventional extrusion and molding equipment without any degradation of the equipment which was normally seen when untreated saran-coated, scrap films were attempted to be molded or extruded.

Abstract: Dry polycaprolactam granules containing from 8 to 13% by weight of caprolactam and its oligomers are prepared by a method in which a caprolactam melt is extruded, the extrudates are cooled to 100.degree.-150.degree. C., left at this temperature until the polycaprolactam has substantially crystallized, and then immediately granulated, and the granules are left in a stream of inert gas, in the absence of molecular oxygen, for from 1 to 4 hours at from 100.degree. to 150.degree. C., and are then cooled.

Abstract: The invention relates to a process for manufacturing highly active, dispersed aluminum hydroxide, of low apparent density. First, unground, very fine grained aluminum tri-hydroxide, of which more than 99% of the grains are at most 3 .mu.m in size, is introduced continuously into a reactor along with a stream of hot dry air, is whirled up and strongly dispersed, heated to 400.degree.-600.degree. C. and shock dehydrated. The low apparent density aluminum oxide flowing out of the reactor in the hot air stream is precipitated out by suitable mechanical means, dispersed in mildly acidic or mildly basic water and rehydrated with the aid of heating. The invention also relates to shaped components of highly active, dispersed low apparent density aluminum oxide having a specific surface area of at least 200 m.sup.2 /g, a pore volume of more than 1.2 cm.sup.3 /g and adequate resistance to fracture and wear.

Abstract: A process for the preparation of insect repelling/killing film. The process involves forming a clathrate compound of fenitrothion with cyclodextrin or a starch decomposition product containing cyclodextrin, at the same time granulating said clathrate compound into dry powder, melt-mixing said dry powder with a synthetic material, which is an olefin, soft vinyl chloride, or vinyl acetate plastic, in an amount of 0.1 to 50% (weight ratio), molding said mixture into pellets, and molding said pellets or a mixture of an appropriate amount of said pellets with a synthetic resin material in the form of film.

Abstract: Disclosed herein are propylene-base random copolymer particles suitable for use in the production of pre-foamed particles. The copolymer particles are obtained by heating starting copolymer particles to the crystallization temperature thereof and then quenching them in a medium of (the crystallization temperature-30.degree. C.) or lower. Processes for obtaining the copolymer particles are also disclosed. Pre-foamed particles produced using the copolymer particles contain large cells. They can thus provide foamed moldings which are substantially free of shrinkage and have good flexibility.