Abstract: A preventative maintenance method of strengthening the connection between high pressure, in situ piping. An encapsulation mold is installed over a properly functioning, non-leaking coupling or joint interconnecting pipe sections carrying gas in excess of 60 psi. A resin sealant having tensile strength in excess of 3000 psi fills the mold, so that it circumscribes the coupling and adjacent portions of the pipe sections extending from the coupling, forming a permanent bond to the coupling and pipe sections. The method prevents high pressure pipe connection pullout, which otherwise could lead to catastrophic failure.

Abstract: Biocompatible materials may be configured into any number of implantable medical devices including intraluminal stents. The biocompatible material may comprise metallic and non-metallic materials in hybrid structures. In one such structure, a device may be fabricated with one or more elements having an inner metallic frame that is not degradable with an outer shell formed from a polymeric material that is biodegradable by extrusion blow molding. Additionally, therapeutic agents may be incorporated into the microstructure or the bulk material.

Abstract: The present invention concerns a process for producing a container having at least one layer and a top layer, wherein the layer contains polycarbonate and the top layer contains polyarylethersulfone or polyarylsulfone, characterised in that a) polycarbonate is melted on an extruder at 230-320° C., b) polyarylethersulfone or polyarylsulfone is melted on a further extruder, c) the melts obtained from steps a) and b) are shaped by coextrusion into a tube, which is then enclosed in a mould, d) the extrudate is inflated inside the mould and pressed against the wall of the mould, forming the shape of the container, and e) the container obtained from d) is trimmed and cooled, such containers and the use of the containers as bottles or medical devices.

Abstract: Processes for manufacturing hollow structures such as spars for helicopter rotor blades, fixed wings for aircraft, and other aerostructures can include the provision of a path for gases to exit the material from which the spar is formed as the material is heated and cured, to help eliminate voids within the material caused by the presence of such gases.

Abstract: Polyester compositions described herein have properties which are particularly suitable for extrusion blow molding (EBM). These properties relate primarily to the rate of crystallization and melt strength or melt viscosity. Articles prepared from the polyester compositions exhibit good clarity, aesthetics, and other physical properties. The polyester compositions also exhibit broad molecular weight distribution (MWD), resulting in improved processability and melt strength. The crystallization rate allows for good drying characteristics while also enabling the use of regrind. In addition, the compositions exhibit improved recyclability, such as in existing PET recycling streams. In one aspect, articles are prepared in an extrusion blow molding method by combining a dry first polyester copolymer component, a dry second polyester component, and a chain extender to form a feed material suitable for extrusion blow molding.

Abstract: A method of deforming an outer wall of polymer pipe is provided. The method includes: forming dual-wall pipe having a smooth wall and a corrugated wall; extruding an outer wall of pipe onto the corrugated wall of the dual-wall pipe; penetrating the outer wall of pipe with a vacuum punch; and drawing a vacuum between the corrugated wall and the outer wall via the vacuum punch; wherein the vacuum drawn between the corrugated wall and the outer wall causes the outer wall to deform in a direction towards the corrugated wall. An apparatus for forming an outer wall of pipe and a mold configured to form a coupling preform in a segment of continuously-extruded and molded polymer pipe are also provided.

Abstract: Described is an inflatable multilayer bolster for a vehicle passenger compartment including a hollow body with back and front walls, an air chamber formed between them, and an inflator for injecting pressurized fluid to inflate the hollow body. Preferably, both the front and back walls have an inner layer made of a structural deformable material and an outer surfacing layer co-extruded with the inner layer. Also described is a method of manufacturing the multilayer bolster by co-extruding first and second polymers through a die to produce a parison, and then blow-molding the parison to form the hollow body. Thus the front wall and preferably the back wall as well have an inner layer made of the first polymer in a structural deformable condition and an outer surfacing layer made of the second polymer. This co-extruded multilayer constructed bolster allows efficient manufacturing, structural, inflation and aesthetic characteristics.

Abstract: The invention concerns a process for the production of hollow bodies of thermoplastic material, in particular a process for the production of fuel tanks of plastic material. In the process according to the invention preforms in web or band form of plasticized plastic material are shaped in a multi-part tool forming a mold cavity by expansion of the preforms and causing them to bear against the internal contour of the mold cavity. The process firstly includes the production of two mutually complementary intermediate products in the form of shell portions. Then respective built-in fitment components are secured to the respective insides of the shell portions, which face towards each other in the installation position, wherein at least some built-in fitment components of mutually complementary shell portions are respectively of mutually complementary configuration, in the sense that they can be joined to provide an assembled component or to provide a functional unit.

Abstract: A hydrophilic, semipermeable hollow-fiber membrane for blood treatment, with an integrally asymmetric structure based on a synthetic polymer. The hollow-fiber membrane possesses on its inner surface a porous separating layer and an open-pored supporting layer adjoining the separating layer, and has an ultrafiltration rate in albumin solution of 25 to 60 ml/(h·m2·mmHg). The hollow-fiber membrane is free from pore-stabilizing additives, and has a minimum sieving coefficient for cytochrome c of 0.8 and maximum sieving coefficient for albumin of 0.005.

Abstract: A laminated and molded body obtained by coextruding and molding at least two kinds of resin materials is preferable as a blow-molding aimed preform, a direct-blow molded bottle, a tube, or a blow molded tube, and has at least one layer constituted of a colored layer having a thickness continuously or intermittently varied in a direction parallel to the extruding direction of the at least one layer and/or in another direction intersecting the extruding direction, thereby enhancing the gradation effect.

Abstract: An extrusion blow molded container is provided comprising a closed base, a body portion extending from the closed base having a surface finish that is substantially free of striations, and an open neck portion extending from the body portion. In an embodiment, the container is comprised of polyethylene terephthalate (PET); the base portion includes a support portion and a substantially elevated portion having a center and a major diameter; and the center is disposed an elevated distance above said surface that is less than about 0.05 the major diameter. A method and apparatus for extrusion blow molding an article is also disclosed.

Abstract: A wrap film having very stable physical properties wherein a sock liquid maintains the lubricating effect as an opening agent while a sock is stabilized and parison width changes and meandering are reduced to eliminate parison wrinkles is provided. Specifically, the wrap film is a wrap film made of a polyvinylidene chloride-based resin prepared by melt-extruding a polyvinylidene chloride-based resin from a die in tubular form, cooling the outer side of the extrudate by using a coolant while an aqueous solution of a liquid that is compatible with water and forms one-component is retained in the hollow portion of the extrudate, and inflating the solidified extrudate, wherein the liquid that is compatible with water and forms one-component has a concentration of 80 to 95% by mass in the aqueous solution, and the liquid is applied to the wrap film in amounts of 50 to 4,000 ppm.

Abstract: A simultaneously molded plurality of composite shingles or double walled shingles or other substantially planar exterior building products are provided, each being comprised of two or more layers of thermoplastic shingle material, such that a weatherable capstock material is provided outside a core material, in the form of a composite parison that is then blow molded in a hollow mold, to produce novel shingles. Ventilation and/or insulation can be provided to a hollow interior between spaced apart walls of a double walled shingle.

Abstract: An extrusion device is described herein, including an inventive die and mandrel that enable the production, using a conventional ram extruder, of strong coherent extremely thin-walled tubes having a wall thickness in the range of about 0.020 mm and about 0.080 mm.

Abstract: A die for molding a cuff on a plastic tube, including an upper shell and a lower shell defining a molding cavity between them; each of the shells has an external structure and an internal wall for defining a half of the molding cavity and for defining a hollow space with the external structure. The molding cavity and hollow spaces are separated from each other by internal walls. The die includes openings which are connected with the molding cavity and the hollow spaces respectively.

Abstract: The present invention provides a method for producing an injection molded panel member having a first portion, a second portion, and an appearance surface portion. The method includes placing the appearance surface portion of the panel member into a mold cavity. The mold cavity preferably includes a first chamber adapted to form the first portion of the panel member, and a second chamber adapted to form the second portion of the panel member. After the appearance surface portion of the panel member is inserted into the mold, molten plastic material and pressurized gas are injected into the first chamber of the mold cavity. After the molten plastic material is injected into the first chamber of the mold, molten plastic material is injected into the second chamber of the mold cavity. The molten plastic is then cooled until it solidifies. After the molten plastic is sufficiently cooled, the pressurized gas is vented and the panel member is removed from the mold.

Abstract: Method of making a multilayer balloon for a catheter having a nominal working diameter comprises forming a tube having at least a first layer and a second layer having a combined wall thickness. The first layer is made of a first polymer material having a first maximum blow-up-ratio and the second layer is made of a second polymer material having a second maximum blow-up-ratio greater than the first maximum blow-up-ratio. The second layer is an inner layer relative to the first layer. The method also comprises forming the multilayer balloon from the tube in a balloon mold having an inner diameter corresponding to the balloon's nominal working diameter. The at least first and second layers of the multilayer balloon define a compliance less than that of a single layer balloon made of the first polymer material with a wall thickness equal to the combined wall thickness.

Abstract: Methods and systems for manufacturing an implantable medical device, such as a stent, from a tube with desirable mechanical properties, such as improved circumferential strength and rigidity, are described herein. Improved circumferential strength and rigidity may be obtained by inducing molecular orientation in materials for use in manufacturing an implantable medical device. Some embodiments may include inducing molecular orientation by expansion of a molten annular polymer film. Other embodiments may include inducing circumferential molecular orientation by inducing circumferential flow in a molten polymer. In certain embodiments, circumferential orientation may be induced by expansion of a polymer tube. Further embodiments may include manufacturing an implantable medical device from a biaxially oriented planar polymer film.

Abstract: A balloon catheter is provided that may be used to dilate hardened regions of a stenosis. The balloon catheter is provided with one or more dilation elements that extend along a surface of a balloon. Each dilation element is connected to an outer surface of the balloon by a connector. The connector is sufficiently sized and designed to undergo stress-induced plastic deformation incurred during blow molding so that a significant portion of each of the dilation elements does not become absorbed into the wall of the final blow molded balloon, thereby maintaining the structural integrity of each of the dilation elements.

Abstract: Disclosed is a multilayer structure, which comprises or is produced from a foil laminated to thermoplastic compositions using ethylene/butyl acrylate copolymer compositions as a tie layer. The multilayer structures can be useful as packaging films and industrial films. Also disclosed is a lamination process for producing the structure. Further disclosed are packages comprising the structures.

Abstract: A hermetically sealed container is disclosed that may be produced by an effective and economical process for an in-plant system. The container comprises a coated unitary tray component having a base portion, a side wall portion, and a flange portion; and a lid component hermetically sealed to the flange portion of the tray component. A selected composite polymer film is blow-molded onto an interior surface of the pre-shaped unitary tray structure to provide the coated unitary tray component having its interior surface seamlessly, creaselessly and integrally bonded with the polymeric film.

Abstract: An automotive fuel tank fabrication apparatus is provided. The automotive fuel tank has a blow mold and a built-in part holding unit. The built-in part holding unit includes a plurality of holding rods for holding a built-in part. The holding rods are made to freely advance and retreat in such a manner as to hold the built-in part in a position where the built-in part confronts cavities when the blow mold is opened and to retreat from the blow mold when the blow mold is closed with the built-in part left positioned in an interior of a parison. The holding rods are formed in such a manner that their diameters are reduced as they extend towards distal ends thereof and are inserted into insertion holes formed in the built-in part so as to hold the built-in part.

Abstract: An extrusion device is described herein, including an inventive die and mandrel that enable the production, using a conventional ram extruder, of strong coherent extremely thin-walled tubes having a wall thickness in the range of about 0.020 mm and about 0.080 mm.

Abstract: A method and apparatus for forming the vessel is disclosed, the vessel having an injection molded interfacial layer formed on a penetrating element and a filament wound outer shell, the interfacial layer coupled to a blow molded inner shell, wherein a portion of the interfacial layer is coupled to the inner shell to facilitate forming a substantially fluid tight connection therebetween.

Abstract: A blown film that comprises polypropylene that has a melt flow rate of 1.8 to 14.0 g/10 min. and a melting point of at least 115° C. The blown film has a haze of less than 10% and a gloss of greater than 70%. The blown film may be co-extruded with a medium density polyethylene or 15 wt % of an impact copolymer. A clarifier may also be incorporated. The blown film that comprises polypropylene is produced on a standard air cooled blown film line.

Abstract: This invention is aimed at preventing containers effectively from performance deterioration, such as exposure of the recycled material at the neck and reduced strength of the pinch-off portion, as caused by a high ratio of recycled material used as the middle layer. There is provided a multi-layered blow-molded container molded from cylindrical multi-layered parison, wall of the container comprising at least an outer layer, an inner layer, and a middle layer, wherein the outer and inner layers are made of a same synthetic resin, while the middle layer is made of a recycled material consisting primarily of the synthetic resin used for the outer and inner layers. This container is characterized in that it has either middle-layer excluded zones or a thin middle-layer zone. These zones are provided at a predetermined range along the direction in which the parison is extruded.

Abstract: A design module is a software module that is implemented in a computer system that comprises instructions stored in a machine-readable medium and a processor that executes the instructions. The design module receives inputs from a person to create a custom insert for a lighting control panel. The inputs identify the content and locations of labels and a decorative background of the insert. Each label is associated with a corresponding input device. Each input device is associated with an optical configuration or “scene” of an environment associated with the lighting control panel. Each label includes alphanumeric text and/or graphics that identify the scene of the label's corresponding input device. The design module causes the insert to be generated by instructing a printer to print the labels and background on a sheet of material, at the specified locations.

Abstract: A computer-based method for defining a surface of a part for placement adjacent a mating surface of a base part is described. The method includes receiving raw data which defines the mating surface of the base part, smoothing the raw data, generating a stable reference frame consisting of at least one of a substantially smooth curve and surface based on the smoothed raw data, calculating a dimensional offset curve or surface using the smoothed raw data and the stable reference frame curve or surface by referencing any peaks in the smoothed raw data within a predefined range of a corresponding point in the stable reference frame curve or surface, smoothing the dimensional offset curve or surface, and outputting the dimensional offset curve or surface for utilization in fabricating the part that is to be adjacent the base part.

Abstract: Method for fabricating a fluid connector for fuel cell system: (a) a thermoplastic parison (19) is extruded, (b) the parison is placed in a mould (10a, 10b), (c) an intermediate zone is created, in which the two walls of the parison are joined in a gastight manner, (d) a gas is blown inside the parison into each cavity of the mould, and (e) the mould is opened.

Abstract: Films comprising a liquid-absorbant layer and an impermeable layer are provided. Processes for manufacturing these films is also provided. The films are suitable for preparation of tubular casings and shrinkbags, in particular, casings for smoked foodstuffs. Also described are foodstuffs processed in the tubular casings.

Abstract: The method comprises the following steps: a) the container opening is sealed, b) at least one wall opening is created by drilling through or piercing the wall of the outer container using a drill, graver or needle, a pressurized medium being introduced into the gap between the outer container and the inner tube, once the wall of the outer container has been fully penetrated, c) the advance of the drill or needle is halted as soon as a predetermined first pressure threshold has been reached in the inner tube, d) the introduction of the pressurized medium into the gap between the outer container and the inner tube is halted as soon as a predetermined second pressure threshold has been reached in the inner tube, e) once the pressure in the gap between the outer container and the inner tube has been relieved, a pressurized medium is introduced into the inner tube through the container opening, in order to place the inner tube against the container wall again after it has been detached from the latter.

Abstract: Described is an inflatable multilayer bolster for a vehicle passenger compartment including a hollow body with back and front walls, an air chamber formed between them, and an inflator for injecting pressurized fluid to inflate the hollow body. Preferably, both the front and back walls have an inner layer made of a structural deformable material and an outer surfacing layer co-extruded with the inner layer. Also described is a method of manufacturing the multilayer bolster by co-extruding first and second polymers through a die to produce a parison, and then blow-molding the parison to form the hollow body. Thus the front wall and preferably the back wall as well have an inner layer made of the first polymer in a structural deformable condition and an outer surfacing layer made of the second polymer. This co-extruded multilayer constructed bolster allows efficient manufacturing, structural, inflation and aesthetic characteristics.

Abstract: A method for manufacturing a resonator is disclosed in which a sleeve insert is placed into a fixture within a blow molding apparatus. The sleeve insert has a wall with a first plurality of apertures in the wall at a first axial distance and a second plurality of apertures in the wall at a second axial distance. A parison is slid over the sleeve insert; the mold is clamped over the parison causing the parison to press into the sleeve insert at three locations: near the ends of the sleeve insert and at a location between the pluralities of apertures; and air is blown into the sleeve insert, via a blow pin, to expand the parison into the walls of the mold to form cavities proximate the first and second pluralities of aperatures. After cooling, the mold opens to release the newly formed resonator.

Abstract: The present invention provides an exemplary process for manufacturing a flexible packaging laminate into a pouch for containing liquids such as edible oil. The process includes taking granules of polypropylene and medium density polyethylene in a proportion of 1-1.5:1.5-2.5, —melting the granules at 200-230 degrees Celsius in a 3 layer blown film extruder to form a co-extruded film, —printing the film by a Rotogravure printing technique at 40-60 degrees Celsius, —laminating the printed film with a conventional 5 layer co-extruded nylon film at 60-80 degrees Celsius, —curing the laminated film at 35-45 degrees Celsius for at least 2 days, —and slitting the cured laminated film to a desired size for using with a Form Fill Seal machine (FFS Machine) at 160-180 degrees Celsius, to make pouches that hold liquids, such as edible oil.

Abstract: An extrusion blow-molding method for plastic containers, for example, plastic bottles, is disclosed, wherein a one- or multi-layer plastic tube is extruded with a predetermined extrusion pressure through an annular gap, which is delimited by an extrusion die provided on an extrusion head and a axially adjustable mandrel and which can be adjusted with regard to the width thereof. The extruded plastic tube is introduced into a mold cavity of a blow-molding tool arrangement, blow-molded into a plastic container in accordance with the mold cavity by overpressure and then demolded. Additional plastic material is added in metered quantity to the extruded plastic tube at least in some regions in the direct vicinity of the mouth of the extrusion die.

Abstract: Methods for coextruding a predetermined initial melt stream through at least one profiled die having a nonlinear inlet opening and an outlet opening. The die insert is positioned so as to cause redistribution of at least a portion of the melt stream. The nonlinear melt stream formed at the nonlinear inlet opening converges within the die insert into a substantially more linear or rectangular melt stream at the die insert outlet opening. At the die insert outlet opening at least one or more regions of the melt stream vary in properties or material clue to the redistribution of the melt stream in the die insert. Articles extruded using the coextrusion methods are also described.

Abstract: A method and an apparatus for producing an endless double-walled pipe having corrugated pipe sections and sleeve pipe sections are described. The production is effected by extrusion of an outer tube (Sa), forming the outer pipe of the double-walled pipe, and of an inner tube (Si), forming the inner tube of the double-walled pipe, in a molding passage (10) having sections with a corrugated molding surface and a smooth cylindrical sleeve molding surface. To shape the sleeve section, the outer tube is extruded into the sleeve molding surface and is brought into contact with the sleeve molding surface. The inner tube (Si) is then extruded into the outer tube (Sa), already in contact over the entire axial length of the sleeve molding surface, and is brought in the process into contact with the inner side of said outer tube (Sa) that is in contact.

Abstract: The present invention relates to a multilayer structure based on polyamides and graft copolymers having polyamide blocks, comprising, in this order: a) a first layer (1) formed from a polyamide (A) or else a polyamide (A)/polyolefin (B) blend having a polyamide matrix; b) optionally, a tie layer (2a); c) a layer (2) based on a graft copolymer having polyamide blocks, formed from a polyolefin backbone and from at least one polyamide graft in which: the grafts are attached to the backbone by the residues of an unsaturated monomer (X) having a functional group capable of reacting with a polyamide having an amine end group; the residues of the unsaturated monomer (X) are attached to the backbone by grafting or copolymerization via its double bond; the layers (1), (2a) and (2) being successive and adhering to one another in their respective contact region. One particularly useful application relates to tubes for cooling circuits of internal combustion engines, such as the engines of cars or lorries.

Abstract: Layer made of base plastic comprising, in the dispersed form, nodules with a diameter of less than or equal to one micron comprising barrier plastic incompatible with the base plastic; multilayer structure comprising at least one such layer and process for the manufacture of such layers/structures.

Abstract: At least one embodiment of the invention relates to a container for a product for dispensing, including a relatively stiff outer container having at least one dispensing opening, and a deformable inner container to be filled with the product which is accommodated in the outer container and which likewise has a dispensing opening. The inner container is connected to the outer container both in the vicinity of the dispensing opening and at least at one location remote therefrom. The connection is formed in that the outer container has an opening through which protrudes at least one fixing element connected to the inner container. This fixing element is pin-like and has an end part of which the dimensions are larger than those of the opening. At least one embodiment of the invention further relates to a method for manufacturing such a container.

Abstract: Process for producing plastic containers, including an extrusion blow molding machine, is disclosed. For example, in an extrusion blow molding process for plastic bottles, in which plastic tubing (T) which has been extruded from an extruder head in a definable cycle is placed in the mold cavity of a blow molding tool arrangement, the inserted plastic tubing is inflated via an infeed blow mandrel by overpressure according to the mold cavity and is then removed from the mold. The extruded plastic tubing (T) is inserted into a mold cavity which is composed of several blow mold cavities which are located axially under one another, two of the blow mold cavities at a time being arranged mirror-symmetrically to one another and connected on their mouth regions and an individual blow mold cavity being separated from the bottom section of the adjacent blow mold cavity by a land region and having a mouth on the outer surface of the blow molding tool arrangement.

Abstract: A polylactic acid resin foamed molding obtained by placing in a mold a cylindrical body having a foamed layer, which is formed by extruding a foamable molten resin composition prepared by kneading together a polylactic acid resin and a physical blowing agent from a die into a low-pressure zone, and molding it, wherein the molding's foamed layer constituting the foamed molding has a difference (?Hendo:2° C./min??Hexo:2° C./min) between the endothermic calorific value (?Hendo:2° C./min) and the exothermic calorific value (?Hexo:2° C./min) obtained by heat flux differential scanning calorimetry (heating rate of 2° C./min) of 10 J/g or more and a melt tension at 190° C. of 2 cN or more.

Abstract: A fuel tank that is substantially impermeable to fuel vapor has a shell with an interior for holding fuel, an opening for receiving fuel into the interior, and a fill nipple with a barrier layer. The fill nipple has an outer surface and an inner surface defining a passage extending between a pair of generally opposed ends of the fill nipple. One of the ends is attached to the shell such that the passage is aligned with the opening to allow fuel to flow through the passage and into the interior of the fuel tank. The fill nipple has an inner layer of material forming the inner surface, and an outer layer of material forming the outer surface, and has at least one intermediate layer of material forming the barrier layer. The intermediate layer is formed from a material that is different in composition from the inner and outer layers.

Abstract: A device comprising a body including a first polymer and a closure including a second polymer that is substantially not bondable to the first polymer and has a relatively higher shrinkage rate than the first polymer, wherein at least a portion of the closure overlaps at least a portion of the body, forming a hermetic seal therebetween and defining a sealed, empty, sterile container.

Abstract: The present invention concerns a process for producing a container having at least one layer and a top layer, wherein the layer contains polycarbonate and the top layer contains polyarylethersulfone or polyarylsulfone, characterised in that a) polycarbonate is melted on an extruder at 230-320° C., b) polyarylethersulfone or polyarylsulfone is melted on a further extruder, c) the melts obtained from steps a) and b) are shaped by coextrusion into a tube, which is then enclosed in a mould, d) the extrudate is inflated inside the mould and pressed against the wall of the mould, forming the shape of the container, and e) the container obtained from d) is trimmed and cooled, such containers and the use of the containers as bottles or medical devices.

Abstract: Regrind is mixed with at least one low density metallocene polyethylene to increase the amount of regrind that can be used in a thermoformed article.

Abstract: A wide mouth plastic barrel with a removable lid and a clamping ring closure is manufactured by extruding a plastic tube into a blow mold and by producing a closed preform. The preform is finish-blown to a barrel body, wherein the blowing air for finish-blowing a barrel body with a closed lid is introduced through a blow nozzle inserted into an intermediate ring of the barrel body and the blowing air for finish-blowing a barrel body with a bung lid is introduced through a bung hole by a blow nozzle and optionally through a blow nozzle in the intermediate ring. After removal from the blow mold, the lid is separated from the barrel body by cutting out the intermediate ring. A seal is inserted into the barrel lid, and the barrel lid is fastened by the clamping ring on a projection of the basic barrel member.

Abstract: A method of manufacturing a product, including extruding a parison, and separating the parison into parison halves by cutting a partially expanded parison or by pulling apart a longitudinally weakened parison, and forming the parison halves against corresponding mold halves. The method may also include applying a film against the parison halves and/or the mold halves, and forming the film and parison halves against the mold halves to produce multi-layer product halves. Apparatuses for performing the method are also disclosed.

Abstract: This invention is aimed at preventing containers effectively from performance deterioration, such as exposure of the recycled material at the neck and reduced strength of the pinch-off portion, as caused by a high ratio of recycled material used as the middle layer. There is provided a multi-layered blow-molded container molded from cylindrical multi-layered parison, wall of the container comprising at least an outer layer, an inner layer, and a middle layer, wherein the outer and inner layers are made of a same synthetic resin, while the middle layer is made of a recycled material consisting primarily of the synthetic resin used for the outer and inner layers. This container is characterized in that it has either middle-layer excluded zones or a thin middle-layer zone. These zones are provided at a predetermined range along the direction in which the parison is extruded.

Abstract: The method comprises the following steps; a) the container opening is seated, b) at least one wall opening is created by drilling through or piercing the wall of the outer container using a drill, graver or needle, a pressurised medium being introduced into the gap between the outer container and the inner tube, once the wall of the outer container has been fully penetrated, c) the advance of the drill or needle is halted as soon as a predetermined first pressure threshold has been reached in the inner tube, d) the introduction of the pressurised medium into the gap between the outer container and the inner tube is halted as soon as a predetermined second pressure threshold has been reached in the inner tube, e) once the pressure in the gap between the outer container and the inner tube has been relieved, a pressurised medium is introduced into the inner tube through the container opening, in order to place the inner tube against the container wall again after it has been detached from the latter.