Abstract: The invention provides, as a method for producing a multi-layer foamed sheet whose scale-like appearance has been improved by means of a multi-layer circular die coextrusion method, a method for producing a multi-layer foamed sheet having foam layers and non-foam layers by a multi-layer circular die coextrusion method which is a method for producing a multi-layer foamed sheet wherein the shear stress at the interface of each layer is 5000 Pa or higher and not higher than 50000 Pa, a method for producing a multi-layer foamed sheet wherein the resin of said non-foam layer is a linear propylenic resin having a melt flow rate of 5 to 30 g/10 minutes, and a method for producing a multi-layer foamed sheet wherein the resin of said foam layer is a propylenic resin whose melt tension (MT) at 190° C. and melt flow rate (MFR) at 230° C. satisfy the following equation A: MT?7.52×MFR (?0.

Abstract: The present invention relates to the fabrication of low cost, in situ, porous metallic, ceramic and cermet foam structures having improved mechanical properties such as energy absorption and specific stiffness. Methods of fabricating the structures from compositions including ceramic and/or metallic powders are provided. The flowable compositions also include an immiscible phase that results in pores within the final structure. Furthermore, the structures may be shaped to have external porosity, such as with mesh-like structures.

Abstract: A method of producing a composite sheet having a foam layer of a first polyolefin-based resin and a surface layer of a second polyolefin-based resin provided on at least one side of the foam layer and containing a polymeric antistatic agent. The method includes coextruding through die a first melt containing the first polyolefin-based resin and a physical blowing agent and a second melt containing the second polyolefin-based resin, the polymeric antistatic agent and a volatile plasticizer to obtain the composite sheet. The amount of the polymeric antistatic agent is 4 to 100 parts by weight per 100 parts by weight of the second polyolefin-based resin and the amount of the volatile plasticizer is 5 to 50 parts by weight per 100 parts by weight of a total amount of the second polyolefin-based resin and the polymeric antistatic agent. The second polyolefin-based resin has a crystallization temperature of Ta [° C.] and a melt viscosity of Ma [Pa.

Abstract: Prepare a foam structure that includes hollow coalesced foam strands and, optionally, solid coalesced foam strands using an extrusion die block equipped with apertures that promote forming the hollow strands and, optionally, the solid foam strands.

Abstract: An extrudable mass of thermoplastic polystyrene and blowing agent is provided with an olefin, e.g. polyethylene, or polypropylene in an amount of from 1% to 5% by weight of the mass. The resulting pellets that are processed from the extrudate are characterized in being dust free and in having a smooth shiny skin without cracks, a sponginess greater than a conventionally made polystyrene pellet and a bulk density of less than 0.2 pounds per cubic foot.

Abstract: A method and an apparatus for making a plastic film, and to a plastic film wherein the method includes extruding a film from plastic material by an extruder and orientating the film after extrusion. Material is mixed into the plastic so that when the plastic film is stretched, cavitation bubbles are formed in the material particles mixed into the plastic. After orientation, gas is arranged to act on the plastic film under high pressure so that the gas diffuses in the cavitation bubbles and causes overpressure in them. Thus it is possible to make a thin foamed film with a foaming degree of over 70%.

Abstract: A thermoplastic film label composite that includes an outer skin layer that has a printable, untreated, cavitated surface which may be utilized for printing and affixing the label to a substrate. The invention further provides a film label composite printed on both its front- and back-side, and a method of manufacturing the same.

Abstract: A thermoplastic elastomer composition for powder molding comprising 100 parts by weight of a polyolefin-based resin(A) and 10 to 1000 parts by weight of a specific hydrogenated vinyl aromatic compound-conjugated diene-based block copolymer(B), a powder of the thermoplastic elastomer composition, a method for powder molding the same, a molded article obtained by the method for powder molding, and a multi-layer molded article containing the molded article as one layer.

Abstract: Methods for manufacturing reinforced, three-zone, microporous membrane having a plurality of different possible pore sizes from at least a single mother dope batch, including formulating at least a single mother dope batch, controllably formulating the dope in at least one vessel such that the dope temperature does not exceed a predetermined maximum mixing temperature and is maintained at a temperature lower than the mixing temperature, heating a small portion of the dope to a target temperature corresponding to a specific desired pore size to be formed in at least one zone of the microporous membrane in at least one thermal manipulation apparatus cooling the dope to about room temperature or a temperature which results in a suitable and/or optimal coating viscosity, operatively connecting at least one dope application apparatus is to the at least one thermal manipulation apparatus for transporting the manipulated dope to a dope processing site.

Abstract: A method of preparing a porous fiber, the method including blending a natural polymer having a thermal stability with a synthetic polymer having a thermal stability, wherein the thermal stability of the natural polymer is different from the thermal stability of the synthetic polymer, and wherein the natural polymer and synthetic polymer from immiscible phases; extruding the blended polymers while heating at a predetermined heating rate to the fiber spinning temperature; spinning the fibers while maintaining the temperature; and heating the fibers at a heating rate that maintains the natural polymer in a fiber form and that removes the synthetic polymer, whereby a porous fiber is formed.

Abstract: A manufacturing method for a synthetic leather includes a first step of feeding materials of preset volume, a second step of materials foaming (capable to be skipped if unnecessary), a third step of material and mixing injecting to produce liquid mixed materials by instant reaction, a fourth step of conveying two basic cloths, a fifth step of compressing the two basic cloths with the liquid mixed materials producing reaction between the two basic cloths conveyed to an upper portion of two rollers to produce synthetic leather, and a sixth step of winding finished synthetic leather on two winding wheels.

Abstract: A method for dehydrating a porous cross-linked polymer conveniently to a low final water content is provided. A porous cross-linked polymer sheet is produced by a method which comprises causing a porous cross-linked polymer obtained by forming and polymerizing a water-in-oil type higher internal phase emulsion to be dehydrated by the use of non-woven fabric rolls furnished with an aspiration mechanism. Properly in this case, the porous cross-linked polymer is subjected to preliminary squeezing. In accordance with the present invention, a porous cross-linked polymer abounding in a water absorbing property to be dehydrated to a low final water content with a small number of rolls.

Abstract: A method for producing an alkenyl aromatic polymer foam structure that comprises melting at least one alkenyl aromatic polymer resin. An effective amount of blowing agent mixture is dissolved in the at least one alkenyl aromatic polymer. The blowing agent mixture comprises at least one VOC blowing agent and acetone. The majority by mole percent of the VOC blowing agent is selected from n-butane, iso-butane, propane and combinations thereof. An extrudate is formed comprising the at least one alkenyl aromatic polymer resin, the at least one VOC blowing agent, and acetone. The extrudate comprises less than about 2.7 wt. % of the at least one VOC blowing agent. The extrudate is transferred to an expansion zone and permitted to expand to produce the foam structure. The foam structure has an extruded density less than about 7 lbs/ft3 and a basis weight of less than about 20 grams per 100 in2.

Abstract: High-strength, chemically and thermally stable, closed-cell foams, useful as structural core materials in sandwich composites. The core materials of the invention display anisotropic properties. The core materials of the invention are amenable to vacuum-mediated resin bonding to composite skins to provide lightweight, high-strength structural sandwiches suitable for use in a variety of applications, such as marine applications, construction, aviation, rapid transit, and recreational vehicles.

Abstract: There is disclosed a honeycomb structure which can be used as a filter for trapping/collecting particulates included in an exhaust gas and in which it is possible to remove ashes deposited inside without requiring any special mechanism or apparatus or without being detached from the exhaust system. The structure comprises a plurality of through channels 9 extending to an axial direction of a honeycomb structure, porous partition walls 7 separating through channels one another, and plugging portions 11; said plugging portion plugging predetermined through channels 9a at one end and the rest of through channels 9b at other end opposite to the plugged end of the predetermined through channels, wherein at least a part of predetermined crossing portions of the porous partition walls is discontinued to form a void portion 17 in each of the predetermined crossing portions.

Abstract: The present invention relates to a process for preparing a foam component, said process comprises the steps of extruding a viscous mixture from a rotating extrusion plate onto a receiving surface. Said process provides a convenient, efficient, simple means of preparing foam components, especially foam components suitable for use in cleaning compositions. The present invention also provides a foam component obtainable therefrom.

Abstract: A stopper for use in a substantially cylindrical bottle opening having a substantially cylindrical shape to seal the bottle opening and including a first polymer portion and a second polymer portion, wherein the second polymer portion coaxially overlies the first polymer portion. In another embodiment, the stopper includes a third polymer portion wherein the first polymer portion coaxially overlies the third polymer portion. A method of protecting liquid in a bottle with a substantially cylindrical bottle opening including providing a stopper having a substantially cylindrical shape to seal the bottle opening and closing off the bottle by insertion of the stopper into the bottle opening. A method of producing a stopper for use in a substantially cylindrical bottle opening comprising extruding a first polymer portion through an extrusion die, coaxially coating the first polymer portion with a second polymer portion to form a body.

Abstract: A process for flash spinning polycyclopentene that has a number average molecular weight of at least 10,000 to 100,000 and an end of melting range of 250 to 330 ° C. in a spin agent of 6 to 9 carbon cycloalkanes, 6 to 9 carbon alkyl-substituted cycloalkanes and alkyl-substituted aromatic hydrocarbons and all having atmospheric boiling points less than 150 ° C.

Abstract: Molten polymers are forced into T dies combined to form a multiple T die, the molten polymers are extruded through the T dies as monolayers. The monolayers extruded through the T dies are superposed and laminated outside the multiple T die while the polymers are in a molten or semi-molten state to form a intermediate molten multilayer. The multiple T die is advanced into a space between an open top half mold and a bottom half mold of a compression mold to deliver the intermediate multilayer onto the bottom half mold. The intermediate multilayer is cut to a predetermined length on the bottom half mold, and is processed for compression molding in the compression mold to form a multilayer article. A molding cycle for molding the multilayer article is carried out automatically at a remarkably improved manufacturing efficiency.

Abstract: A motor vehicle has a first body part with a seal support flange thereon that supports a unitary seal construction having a flexible bulb seal portion engageable with second vehicle body part including a hood or other vehicle body part for sealing against leakage between the first and second vehicle body parts and an integrally formed base portion and wherein the flexible bulb seal is hollow and is formed of a soft low density thermoplastic foam and the integrally formed base portion is integrally extruded with the flexible bulb seal and is formed solely from polymeric material having spaced walls defining a recess for fitting the unitary seal construction in place on the support flange.

Abstract: Extrusion molding is performed while the extrusion molding is regulated from the skin layer side so that the foaming capacity of a portion opposite to a surface of a reinforcement portion of an insert having at least one gap portion is smaller than the foaming capacity of a portion where the gap portion is filled with the foam layer when a foamable resin is foamed.

Abstract: A method for producing an at least partially open-celled foam foil on a basis of styrene polymers, nucleating agents, surfactants, physical foaming agents and, if required, further additives, such as foreign polymers and auxiliary materials, comprising a twin-screw extruder with identical parallel screws rotating in the same direction, wherein the twin-screw extruder has a length of at least 25 D (D=screw diameter), in particular 30 to 42 D, with a draw-in and plastification zone of a length of 10 to 15 D, and a mixing zone of a length of 3 to 6 D, and a following cooling zone.

Abstract: Isopycnic or asymmetric mixed matrix hollow fiber membranes for gas separation can be made by a continuous spinning process. Mixed matrix membranes are characterized by a continuous phase of selectively gas permeable polymer in which are uniformly dispersed discrete absorbent particles such as molecular sieves that also have selectivity enhancing properties. The fibers can be monolithic in which the fiber wall is entirely mixed matrix, or composite in which an active mixed matrix layer is positioned adjacent to a supporting substrate layer. The novel mixed matrix hollow fiber membranes provide higher selectivity than dense film membranes of the continuous phase polymer.

Abstract: A method of manufacturing wire from a conductor and a supply of thermoplastic insulating material. The method involves heating the insulating material, adding pressurized gas to the material, and extruding a sheath of the insulating material about the conductor to generate bubbles of the gas in the sheath. The method may operate by limiting the temperature of the material prior to extrusion, to increase viscosity to limit bubble expansion, and may provide a significant pressure drop on extrusion by limiting the gap between a wire-supplying guide and the extrusion die.

Abstract: An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

Abstract: The present invention generally relates to processes for preparing extruded foam products and more particularly to a process for producing such products wherein surface defects are minimized. There has been a movement to replace conventional halo-carbon blowing agents in favor of purportedly more environmentally safe halo-carbon free blowing agents such as carbon dioxide, nitrogen, argon, water, air, nitrogen, and helium. However, these halo-carbon free blowing agents, in particular carbon dioxide, have higher foaming rates and higher volatility leading to greater surface defects in the extruded foam. The present invention employs polyethylene wax to reduce or eliminate the occurrence of surface defects where halo-carbon free blowing agents are employed in an extruded foam manufacture process.

Abstract: A method of manufacturing a hose includes the step of extruding a tube assembly comprising (i) a first inner non-foamed layer, (ii) a first outer non-foamed layer positioned around the first inner non-foamed layer, and (iii) a first foamed layer interposed between the first inner non-foamed layer and the first outer non-foamed layer. The method further includes the step of positioning a textile reinforcement on the tube assembly. Additionally, the method includes the step of extruding a cover assembly over the textile reinforcement, the cover assembly comprising (i) a second inner non-foamed layer, (ii) a second outer non-foamed layer positioned around the second inner non-foamed layer, and (iii) a second foamed layer interposed between the second inner non-foamed layer and the second outer non-foamed layer.

Abstract: An internal gear set comprising an inner rotor having a number of radially projecting cylindrical tooth members engaging a conjugate internally toothed outer rotor. The latter has one more tooth than there are tooth members on the inner rotor and is mounted eccentrically to the inner rotor so that the rotors move conjugately relative to one other.

Abstract: The invention relates to an extrusion head for the manufacture of tubes comprising at least one layer of expanded plastic by extruding a stream of molten plastic containing a blowing agent through an annular passage cross section made in the extrusion head and in which the stream of molten plastic containing the blowing agent spreads out circumferentially and welds itself to itself by the recombining of the two stream fronts, the said extrusion head being equipped with a special-purpose thermal regulation device allowing the molten plastic containing the blowing agent to be heated or cooled after the stream fronts have recombined.

Abstract: A fiber having a surface with a relatively low coefficient of friction portion and a relatively high coefficient of friction portion. The fiber maybe produced by slitting a film/sheet which has been coextruded, laminated and/or coated, or by partially coating a base fiber. Fabrics made from such fibers exhibit increased structural integrity.

Abstract: An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

Abstract: The present invention is a foam composite wood replacement material and a method for its manufacture. One embodiment of the present invention is a cellulosic/polymer foamable composite material. The composite material may include at least one cellulosic filler in the amount of about 20% to about 60% by weight and a plastic material in the amount of about 40% to about 80% by weight. The plastic material may include stabilizer(s) in an amount of about 1 to about 10 parts per 100 parts of a polymer resin, lubricant(s) in an amount of about 1 to about 12 parts per 100 parts of the polymer resin, process aid(s) in an amount of about 2 to about 15 parts per 100 parts of the polymer resin, and blowing agent(s) in amount of about 0.25 to about 5 parts per 100 parts of the polymer resin. Examples of the polymer resin are polyvinyl chloride and polypropylene. The foamable composite may be used to make structural components such as siding units.

Abstract: A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.

Abstract: A double sided tape for detachably mounting a flexible printing plate to a flexographic printing press cylinder includes pressure-sensitive adhesive layers on opposed sides of a coextruded multilayer carrier having a core formed of a thermoplastic elastomer containing a uniform distribution of voids and one or more skin layers formed of film-forming thermoplastic polymer. The cellular thermoplastic elastomer is constructed to accommodate compressibility loads imposed during printing and to resist shear and tensile loads imposed during tape removal.

Abstract: New cross-linked polymeric foam compositions, and methods for making the same, are provided. The new compositions utilize novel cross-linked polyolefin copolymers and show improvements in strength, toughness, flexibility, heat resistance and heat-sealing temperature ranges as compared to conventional low density polyethylene compositions. The new compositions also show processing improvements over linear low density polyethylene. The novel polyolefins, which are essentially linear, comprise ethylene polymerized with at least one alpha-unsaturated C3 to C20 olefinic comonomer, and optionally at least one C3 to C20 polyene, and exhibit, in an uncross-linked sense, a resin density in the range of about 0.86 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.5 dg/min to about 100 dg/min, a molecular weight distribution in the range of from about 1.5 to about 3.5, and a composition distribution breadth index greater than about 45 percent.

Abstract: A foamed polyethylene product has an outer sheath of non-foamed polyethylene fused to an underlying foamed body portion. Preferably, the product is produced in an in-line method when the foam body is extruded and subsequently the skin is extruded directly on the body portion. This process only causes limited thermal degradation of an outer layer of the body portion which improves adhesion of the skin to the body portion.

Abstract: A process for preparing a coated substrate having an MVTR greater than about 5 perms comprises the steps of providing a substrate, applying onto a surface of the substrate a layer of a primer, comprising a polyamine or polyacetate, and extrusion coating a monolithic layer of breathable polymer onto the layer of primer.

Abstract: A thermoplastic polyester resin is fed into a twin extruder, wherein a resin is heated for melting, thereby removing moisture in the resin by evacuating and sucking from a vent port thereof, injecting a foaming agent into the resin to which is pushed out as a foaming sheet and, after that, forming the foaming sheet which is divided into a forming body and a trimming loss, whereby the trimming loss is crushed to obtain crushed materials which are provided so as to put the materials into the twin extruder as collection materials and recycle them.

Abstract: A method for producing an opaque polymeric film comprises: (a) extruding a base layer comprising a polymeric matrix and at least one cavitating agent; (b) coextruding at least one additional layer on at least one side of the base layer; (c) cooling the coextruded multi-layer film; and then (d) orienting the film in at least the machine direction (MD); wherein at least said base layer contains a syndiotactic polystyrene polymer, and wherein said syndiotactic polystyrene polymer is in the form of solid, non-hollow particles during the orienting step (d).

Abstract: A method of manufacturing a foamed article includes embossing or otherwise impressing a three dimensional pattern into a surface of an article formed from a polymer composition with a blowing agent. The three dimensional pattern is formed prior to activation of the blowing agent and curing of the article. The article is then heated to activate the blowing agent and cure the material. The final article retains the three dimensional pattern in its expanded form.

Abstract: In order to achieve an economical and trouble-free continuous extrusion of plastic hollow profiles having at least one hollow chamber that is filled with foam, the profile tool of an extrusion device is configured in the shape of a pistol. The profile tool comprises a pistol shaft (102) with a melt feed channel (166), which is connected to the melt discharge opening of the extruder (300) and which opens into a melt radial distributor channel (164) that surrounds the lance guide channel (150). The profile tool is also equipped with a pistol barrel (101) comprising a melt ring channel (162), which extends from the melt radial distributor channel (164) to the profile nozzle (160) and comprising a lance guide channel (150), which extends in a continuous manner from a lance inlet (152) to the profile nozzle (160).

Abstract: A separator for use in zinc/bromine secondary batteries comprising a polyethylene having an overall viscosity average molecular weight of not less than 350,000 and not more than 2,000,000 containing not less than 10 wt. % and not more than 80 wt. % of a polyethylene having a weight average molecular weight of 1,000,000 or more and fine particulate silica, wherein the ratio by weight of polyethylene/fine particulate silica is more than 1 and less than 1.5, and the ratio of the number of silicon atoms (Si) to the number of carbon atoms (C), Si/C, exposed on the surfaces of said separator excluding cross-sectioned surfaces thereof is not less than 0.01 and less than 0.2 as determined by X-ray photoelectron spectroscopy (XPS).

Abstract: A method and apparatus for purifying an aqueous suspension comprising feeding an aqueous suspension containing fine particles comprising an inorganic component from the outer surface of a wavy hollow fiber membrane having an outer diameter of from 0.5 to 3.1 mm to filter, followed by physical wash of the hollow fiber membrane. The purifying method can reduce the damage of the membrane outer surface during the physical wash step, prevent open pores on the surface from covering and achieve stable filtration. The hollow fiber membrane bundle can be produced by having a pulsation flow contacted with the hollow fiber material being extruded from the double spinning nozzle under specific conditions and cooling and solidifying or coagulating it while shaking.

Abstract: A coated metal tubing arrangement having a metal tube, a first layer of a first polymeric material and a second layer of a second polymeric material having a foamed structure. The second layer is located directly radially outwardly of the first layer. The second polymeric material is chemically similar to the first polymeric material.

Abstract: An apparatus and methods for mixing and injecting a foam core within an extruded shell preferably of plastic downstream from an extrusion die to produce a uniform building product. The preferred apparatus includes a mixing head injector for mixing a binary system foam. The mixing head injector incorporates pressurized gas injection for homogenization of the foam core. A preferred method employs the mixing head injector and a novel calibrator thereby allowing injection of a foam core within the shell as it passes through a calibrator to reliably produce a uniform building product. An alternative method employs a second extruder. Alternative methods employ a mounting fixture downstream of a first calibrator.

Abstract: A blown foamed film of polyester resin, obtained by blow-molding a foamed tubular sheet at the outlet of a foaming extruder.

Abstract: The invention provides, as a method for producing a multi-layer foamed sheet whose scale-like appearance has been improved by means of a multi-layer circular die coextrusion method, a method for producing a multi-layer foamed sheet having foam layers and non-foam layers by a multi-layer circular die coextrusion method which is a method for producing a multi-layer foamed sheet wherein the shear stress at the interface of each layer is 5000 Pa or higher and not higher than 50000 Pa, a method for producing a multi-layer foamed sheet wherein the resin of said non-foam layer is a linear propylenic resin having a melt flow rate of 5 to 30 g/10 minutes, and a method for producing a multi-layer foamed sheet wherein the resin of said foam layer is a propylenic resin whose melt tension (MT) at 190° C. and melt flow rate (MFR) at 230° C.

Abstract: Molding, including injection molding, of crystalline or semicrystalline polymeric material is described. Microcellular polymeric material is preferred. The invention involves use of a viscosity-reducing additive in molding that results in relatively better crystallinity at relatively lower mold temperatures, and lower aging time.

Abstract: A method for extruding a corrugation-free polystyrene foam with up to 100% carbon dioxide as the blowing agent by extruding the extrudate through an annular die opening so that it contacts a choke ring inner surface. A foam made with the apparatus according to the invention will have no visible corrugations and an average cell size of less than 0.35 mm.

Abstract: An annular die designed to produce polymer foam using only one or more ambient gasses as a blowing agent includes an exiting channel with an exit having a cross-sectional area between about two and about ten times that of a smallest point within the exit channel. The section of the die from the smallest point to the exit is thermally isolated from the rest of the die, and the temperature thereof is independently controlled. In addition, the interior surface of the exit channel is coated with a friction-reducing coating.