Abstract: A process for producing a fiber reinforced resin which comprises placing at least a reinforcing fiber substrate in a cavity of a mold, injecting a resin into the cavity, and curing the resin, characterized in that a substrate for forming a skin layer, and a resin distribution medium, which is located between the substrate for forming the skin layer and the reinforcing fiber substrate and in which the ratio of the coefficient of impregnation thereof to that of the substrate for forming the skin layer is 1.5-10, are disposed on at least one surface of the reinforcing fiber substrate via an interlayer having a cover factor of 90%-100% and comprising at least one woven fabric. The process diminishes pinhole generation in the skin layer in RTM, and can reduce the necessity of a repair step in, e.g., a painting step as a later step, thereby improving productivity.

Abstract: Manufacturing of a composite component, such as a composite component of an aircraft, is provided with a molding tool that includes, but is not limited to a first mold, a second mold and a pressure generator. Between the first mold and the second mold, a membrane is arranged so that between the first mold and the membrane a first region is formed, and between the second mold and the membrane a second region is formed. In the first region, a fibrous mat is arranged. In the second region with the use of the pressure generator 116 counter-pressure can be produced so that the membrane is pressed in the direction of the fibrous mat.

Abstract: A system for self-repairing matrices such as concrete or cementitous matrices, polymeric matrices, and/or fibrous matrices, including laminates thereof The system includes repair agents retained in and/or on vessels, such as hollow fibers, within the matrix. Upon impact, the vessel rupture, releasing the chemicals. For multi-layer laminates, the systems provides a total dynamic energetic circulation system that functions as an in situ fluidic system in at least one layer or area. The energy from the impact ruptures the vessels to release the chemical(s), and mixes the chemical(s) and pushes the chemical(s) and/or resulting compound through the matrix. The repair agents can withstand high temperatures, such as the heat of processing of many laminates, e.g., 250-350° F.

Abstract: A liquid-pervious fibrous non-woven fabric includes staple fibers made of thermoplastic synthetic resin fused together which is formed on its upper surface with a plurality of ridges, and a plurality of grooves extending in parallel in a longitudinal direction. The ridges and grooves are arranged alternately in a transverse direction. On the upper surface, some of the staple fibers extend across the ridges to the adjacent grooves on each side of the ridges and are, in the respective grooves, fused to the staple fibers of a different type from the former staple fibers.

Abstract: A pressure debulking system includes a debulking chamber having a debulking chamber interior, a pressure bladder having a bladder interior provided in the debulking chamber interior, a vacuum port disposed in fluid communication with the debulking chamber interior and a pressure port disposed in fluid communication with the debulking chamber interior. A pressure debulking method is also disclosed.

Abstract: The present invention provides a method for manufacturing a film catalyst, including forming a catalyst layer on one side or each side of a base material to obtain a film catalyst, bending the film catalyst, and optionally cutting the film catalyst, wherein the bending step is conducted by bending the film catalyst with a bending tool composed of two gears that are oppositely arranged as meshing each other while a protective material having a compressibility of 40 to 95% is inserted between the catalyst layer of the film catalyst and the two gears.

Abstract: A method for producing a foamed article including a supporting element, a foam layer, and an upholstery cover applied on said foam layer, comprising the steps of forming said upholstery cover by stitching together a plurality of lengths of upholstery cover, positioning the sewn upholstery cover on a convex positioning surface of a positioning member withholding the sewn upholstery cover on said positioning member by means of a first suction system, setting said positioning member with the sewn upholstery cover withheld thereon by suction in a bottom die of a foaming die, deactivating said first suction system and withholding the upholstery cover on a concave positioning surface of said bottom die by means of a second suction system, extracting said positioning member from said bottom die leaving said upholstery cover positioned and withheld by suction on said concave positioning surface, positioning a rigid supporting element on a plunger of said foaming die and closing the plunger on said bottom die so as to

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: A process and apparatus for multi-shot, liquid-resin-molding of continuous-fiber composite articles is disclosed. The process involves the step-wise fabrication of an article wherein continuity of the fibers is maintained between the multiple workpieces of the finished composite article.

Abstract: A dry fabric seal for use with tooling for liquid resin molding processes and a method for creating the seal are disclosed. In the illustrative embodiment, the seal comprises an annular resin reservoir, a level of resin within the reservoir, a device for controlling the resin level, and a perforated pressure plate that forms one wall of the reservoir. The seal is created by controlling the level of resin between the tooling (e.g., the inner and outer molds, etc.) so that air cannot leak in (for vacuum processes) or out (for pressurized processes) between the fibers in the fabric near the top of the molds.

Abstract: A tool for the infusion of a resin into a preform made of fiber material includes a mould which can be closed around the preform and in the body of which at least one inlet duct is formed to allow resin to be injected into the mould so that the resin can be infused into the preform. At least one reservoir which can contain the resin, is also formed in the body of the mould and is connected to the at least one inlet duct. The mould can be inserted in an autoclave and the reservoir is configured to permit the transfer of the resin from the reservoir to the inlet duct under the effect of the temperature and of the pressure that are produced in the autoclave, thus allowing the resin to be injected into the mould.

Abstract: Disclosed herein is a nonwoven fabric comprising within the range of from 50 to 99 wt %, by weight of the composition, of a reactor grade propylene-?-olefin copolymer possessing within the range of from 5 to 35 wt %, by weight of the copolymer, of units derived from one or more of ethylene and/or C4 to C12 ?-olefins; a melt flow rate (230° C./2.16 kg) within the range of from 500 to 7500 g/10 min; and a weight average molecular weight of less than 200,000; and a second polypropylene having a melting point, Tm, of greater than 110° C. and a melt flow rate (230° C./2.16 kg) within the range of from 20 to 7500 g/10 min; wherein the fabric has a CD Elongation value of greater than 50% (measuring the fabric of 35 g/m2 basis weight). The fabric described herein can be used in structures comprising one or more layers of the fabric described herein, and can include any number of other fabric layers made from other materials.

Abstract: Resin infused composite parts are fabricated using a caul sheet having perforations therein for optimizing the flow of resin through the parts and allowing a simplified tooling and consumable arrangement for complex parts while achieving a smooth, aerodynamic caul-side or bag-side finish.

Abstract: The present invention generally relates to a mold assembly (32, 34) and a method of using the mold for the manufacture of composite parts which, more particularly, are generated from a strengthener in a generally solid phase and a matrix in a generally liquid phase. Various types of molds and processes may be used in order to impregnate a strengthener with a matrix such that a composite part may be manufactured, but the efficiency rate and the duration of the manufacturing process significantly varies depending on the chosen type of mold and process. The present invention relates to a mold assembly and to the manufacture of composites by using the mold assembly which includes the injection of the matrix in the mold assembly containing the strengthener and a deformable member (36) which favors the impregnation of the matrix toward the strengthener.

Abstract: A method for manufacturing an elongate stiffening element and a rigid shell structure integrated with at least one elongate stiffening element. The method includes providing a preformed, form-stable reinforcement member, which has a hat profile with two inwardly directed, opposing flange portions, covering the reinforcement member with a curable composite material to form an external hat profile having outwardly directed flanges, and integrating this assembly with either a curable or preformed shell structure of composite material.

Abstract: A method for making a honeycomb composite structure wherein the method allows for fluid flow from cells of a honeycomb core during a cure process. More specifically, the method involves forming one or more vents in a skin of the structure, which are preferably filled with venting wicks, to allow for fluid flow before being sealed by the polymer matrix during a skin bonding process. Additionally, the structure preferably comprises a scrim that allows for fluid flow between multiple cells of the honeycomb core. The honeycomb composite structure produced according to this process comprises, among other things, a sealed venting region that comprises a polymer matrix and fibers that are transverse to the skin.

Abstract: Techniques for manufacturing structures that include composite hat stringers are disclosed. In one embodiment, a method of forming a composite structure includes placing a generally cured composite hat stringer on a tool, the hat stringer having a rigid mold line conformal surface for adjoining a generally uncured skin, positioning the skin adjacent to the rigid mold line conformal surface, coupling the skin to the rigid mold line conformal surface of the composite hat stringer, including applying a pressure to a surface of the skin to urge the skin into engagement with the composite hat stringer, and curing the skin.

Abstract: A process and apparatus for multi-shot, liquid-resin-molding of continuous-fiber composite articles is disclosed. The process involves the step-wise fabrication of an article wherein continuity of the fibers is maintained between the multiple workpieces of the finished composite article.

Abstract: A method of manufacturing a multilayer nonwoven fabric includes a supporting step of arranging on a predetermined surface of a permeable supporting member a multilayer fiber aggregate, a moving step of moving the multilayer fiber aggregate supported on the permeable supporting member in a prescribed direction by a predetermined moving device, and a spraying step of spraying a fluid onto the multilayer fiber aggregate moved in the prescribed direction in the moving step from the second surface by a predetermined spraying device.

Abstract: A method of making a fenestration framing member includes providing a core of size and shape corresponding to the desired size and shape of the fenestration framing members. A fiberglass mat is placed on the core to form a fiberglass-engaged core, and resin is vacuum infused into the mat to form a fenestration framing member that includes fiberglass-reinforced resin engaging the core. The starting core and the final fenestration framing member preferably are of curved geometry lengthwise of the core and member. The step of vacuum infusing resin into the mat surrounding the core preferably is carried out by placing the fiberglass-engaged core into a vacuum enclosure, preferably a vacuum bag, and connecting the vacuum enclosure to a vacuum source and a resin source. In one embodiment of the disclosure, the mat surrounds the core so that the core is part of the fenestration framing member.

Abstract: A system and a method for the production of cellular materials are described. In particular, a system and a method for the production of cellular materials with several geometries such as honeycomb geometry, chiral geometry and auxetic geometry are described. The innovative concept of the present invention concerns the pre-formation of the cellular structure by penetration of a reinforcement fabric by means of punches properly structured. The employment of punches housed on one of the matrices of the device allows obtaining several geometries without need of complex fabric pre-formation operations or of manual placement of the fabric in the interstices of the mold.

Abstract: A method of manufacturing a reinforcing cloth of a seat pad includes: fixing a sheet on a mold having an outer shape substantially identical to a shape of the reinforcing cloth and provided with a plurality of air holes interconnecting an internal space with an outer surface; forming a closed space between the mold and a cover member by covering the sheet fixed on the mold with the cover member; heating the sheet; shaping the heated sheet into a shape following the outer shape of the mold by exhausting air from the closed space through the air holes; and demolding the sheet from the mold after removing the cover member.

Abstract: A method of making a fenestration framing member includes providing a core of desired cross section and geometry lengthwise of the core. A fiberglass mat is placed around the core to form a fiberglass-enclosed core, and resin is vacuum infused into the mat to form a fenestration framing member that includes fiberglass-reinforced resin enclosing the core. The starting core and the final fenestration framing member preferably are of curved geometry lengthwise of the core and member. The step of vacuum infusing resin into the mat surrounding the core preferably is carried out by placing the fiberglass-enclosed core into a vacuum enclosure, preferably a vacuum bag, and connecting the vacuum enclosure to a vacuum source and a resin source.

Abstract: Disclosed herein is a nonwoven fabric comprising within the range of from 50 to 99 wt %, by weight of the composition, of a reactor grade propylene-?-olefin copolymer possessing within the range of from 5 to 35 wt %, by weight of the copolymer, of units derived from one or more of ethylene and/or C4 to C12 ?-olefins; a melt flow rate (230° C./2.16 kg) within the range of from 500 to 7500 g/10 min; and a weight average molecular weight of less than 200,000; and a second polypropylene having a melting point, Tm, of greater than 110° C. and a melt flow rate (230° C./2.16 kg) within the range of from 20 to 7500 g/10 min; wherein the fabric has a CD Elongation value of greater than 50% (measuring the fabric of 35 g/m2 basis weight). The fabric described herein can be used in structures comprising one or more layers of the fabric described herein, and can include any number of other fabric layers made from other materials.

Abstract: Air embossing systems, air lances, and methods of air embossing fabrics produce an unprecedented level of fine detail, crisp transition between unembossed and embossed regions, and a high degree of uniformity across the width of an embossed fabric. The air embossing systems can utilize air lances for directing a stream of air onto the embossable surface of a fabric that have at least one nozzle having a characteristic orifice dimension substantially less than that of conventional air lance nozzles, and also substantially less than a characteristic length of the nozzle. Air lances can also include one or more nozzles in the shape of an elongated slit oriented so as to be positioned across essentially the entire width of a fabric being embossed.

Abstract: A mold for molding fibrous molding media includes upper and lower mold bodies defining a mold cavity, the upper and lower mold bodies being movable relative to each other to close the mold. The upper and lower mold bodies have respective upper and lower mold surfaces for contacting the fibrous molding media positioned within the mold, and have gas flow openings configured to direct gases into contact with the fibrous molding media. The mold also includes a source of gas connected to the gas flow openings.

Abstract: This invention relates to a novel apparatus and process for producing thermoplastic articles. In one aspect, the invention pertains to a process for manufacturing fiberglass products using a fiberglass material consisting of fiberglass strands commingled with heat-formable polypropylene strands. A molding apparatus comprising: (a) an air pressure chamber with an open side; (b) a flange plate fitted to the open side of the air pressure chamber, said flange plate having an opening therein for receiving a mold; (c) an upper bladder associated with the flange plate and covering the opening; (d) a base pressure plate; (e) a mold positioned on the base pressure plate; and (f) a locking mechanism for securing the air pressure chamber with the base pressure plate, and balanced air pressure in each chamber during molding.

Abstract: A composite material comprising an inorganic filler material and a oriented fibrous polymeric material characterised in that the fibrous material has areas of adjacent fibres fused together to form a network or continuous matrix while retaining oriented fibrous structure in the composite.

Abstract: Air embossing systems, air lances and methods of air embossing fabrics produce fine detail, crisp transition between unembossed and embossed regions, and a high degree of uniformity across the width of an embossed fabric. The air embossing systems utilize air lances (210) for directing a stream of air onto the embossable surface (113) of a fabric (111) that have at least one nozzle (216) having an orifice dimension substantially less than that of conventional nozzles.

Abstract: A carbon friction material, preferably a woven carbon friction material, wherein a binder such as an epoxy or phenolic resin is used to strengthen and impart rigidity to the friction material. The friction material has a graded concentration of the binder such that the friction surface may have substantially no binder. A reinforcing substrate such as a fiberglass backing may also be present. The coefficient of friction at the friction surface may be further increased by, for example, shaving the surface such that a plurality of fibers become oriented in a direction perpendicular to the friction surface.

Abstract: A vehicle carpet module consisting of a piece of tufted carpet that is attached to a piece of thermoplastic material, the module being contoured to the shape of a motor vehicle floor. The carpet module being vacuum formed over a single hollow mold element. The mold element having a molding surface shaped to correspond to the shape of the vehicle floor and having a plurality of vacuum ports formed through the contoured surface. A vacuum pulling the air from the interior of the mold element and causes the vacuum ports to draw a heated carpet segment against the contoured surface and thereby shape the segment into a carpet module. The carpet segment is heated sufficiently soften the thermoplastic material which, upon subsequent cooling, hardens to retain the shape of the molding surface.

Abstract: Bicycle frame components without laps made by a method comprising; shaping a fluid-removable core in the general form of the component, placing a flexible inflatable bladder around the core, wrapping over the assembly of core and bladder at least one ply of fiber impregnated with a curable resin, forming a cured part by inflating the bladder while the assembly of core, bladder, and impregnated fiber is in a mold to force the plies against the inner surfaces of the mold, such that compaction of the fiber against the mold is predominantly from the bladder inflation and not from the core, and heating to cure the resin to form a cured part, removing the bladder and the fluid-removable core from the interior of the cured part by disintegrating the fluid-removable core with a fluid sufficient to allow removal of the core and the bladder.

Abstract: A method for the production of a porous, sound- and heat-insulating shaped element, in particular for lining of sound- and/or heat-emitting vehicle components, by shaping and solidifying a bonded fiber fabric made of natural fibers mixed with a thermoplastic binder in a press mold. The binder is crosslinked uniformly in all regions of the porous shaped element to produce a shaped element featuring a formaldehyde emission of less than 2 ppm due to the replacement of conventional resins with the thermoplastic binder.

Abstract: A hollow panel having a cover material bonded thereto includes a first wall having an inner surface and a substantially planar outer surface. A second wall opposes the first wall so as to define a hollow space therebetween and has at least one protrusion formed therein. Each protrusion has a tip which is integrally joined to the inner surface of the first wall to form a double-walled rib bridging the hollow space. The double-walled rib has integrally joined opposing walls such that an outer surface of the second wall is substantially planar. The cover material is bonded to the outer surface of the first wall.

Abstract: A bag for the cleaning and containment of soiled fabric articles is provided which comprises a fastening system that, when fastened provides a vapor impermeable container and an interior surface releasably impregnated with an effective amount of a gelled liquid dry-cleaning composition.

Abstract: A manufacturing process for reverse building complex-shaped vehicle fuel tanks using complementary female mold half sections which, when joined together about their mating peripheral edges, exactly duplicate the fuel cavity framework of the vehicle into which the completed tanks are to be mounted. Whereas previous reverse building processes employed light weight, air-curable, non-tear fabric such as nylon fabric reinforcement to both halves of the female molds, such fabric is applied only to the mold for the top half of the fuel tank of the present invention. Self-sealing, autoclave curable materials are used in the bottom half of the fuel tank, thereby providing improved ballistic protection to the lower portion of the tank.

Abstract: A method for producing a heel mat-attached floor rug for a motor vehicle. A floor rug proper is prepared which has been previously compression-molded to have a three-dimensionally projected portion. Then, the floor rug proper is put on a lower die of a depression-molding device in such a manner that the three-dimensionally projected portion of the rug proper neatly covers a projected portion formed on a shaping surface of the lower die. Then, a heel mat of thermoplastic material is put on a shaping surface of an upper die of the compression-molding device. The shaping surface of the upper die has a depressed portion which is shaped to neatly receive the projected portion of the lower die. Then, the upper die is pressed against the lower die having the heel mat and the floor rug proper put therebetween. Then, a lower surface of the heel mat is melted, by means of high frequency induction welding, thereby to bond the heel mat to the floor rug proper.

Abstract: Equipment and method for manufacturing integral monolithic structures, using reinforcing fiber layers impregnated with thermosetting resins. The apparatus has an equipment base, which determines the shape of the structure, a cover of the equipment, two side supports enclosed by an outer bag of nylon or similar material and by as many supporting elements as the number of bays required breathing material; a sheet of parting film, sealing mastic, vacuum application valves, a tubular parting film and tubular bags. The invention simplifies the manufacturing process and is particularly important in the aeronautical field and wherever there is a need for very low weight, high structural efficiency and high quality standards.

Abstract: A degradable non-woven fabric obtained from an web formed of lactic acid-based polymer filaments comprising of one or more lactic acid-based polymers selected from a poly (DL-lactic acid) having more than 80 mol % of L-lactic acid units, poly (DL-lactic acid) having more than 80 mol % of D-lactic acid units, L-lactic acid/hydroxycarboxylic acid copolymer having 70 mol % or more of L-lactic acid units, and D-lactic acid/hydroxycarboxylic acid copolymer having 70 mol % or more of D-lactic acid units, and a preparation process of the degradable non-woven fabric which has good dimensional stability and can be degraded and disappeared under natural environment when abandoned.

Abstract: In order to produce multilayer structures of composite materials by draping recut elementary layers on a shaping mold, an installation is proposed which comprises, apart from the mold, a gripping tool which can e.g. be fitted on the articulated arm of a robot. The shaping mold comprises a flexible membrane equipped with suction cups ensuring the gripping of the elementary precut layers. A vacuum circuit makes it possible to engage the membrane on a countermold placed behind the latter in order to shape the grasped elementary layer. When the tool is brought onto the mold, a pressure source acts on the membrane in order to compact the elementary later on the mold. A suction system keeps the layer on the mold following the release of the suction by the cups.

Abstract: Packaging, particularly for medical supplies and devices, is made from spunbonded olefin sheet material. At least a portion of the olefin sheet material is deformed to increase its surface area by between 4 and 60 percent, so as to create a pocket of a dimension sufficient to envelope the medical supply or device. After the medical supply is placed within the pocket, it is covered and sealed by another sheet having microbial barrier characteristics. Even though deformed, the spunbonded olefin packaging possesses the ability to allow quick passage of sterilizing gas, yet is resistant to penetration by contaminating microorganisms.

Abstract: A high temperature, high pressure resistant packing (e.g., for the packing gland of a valve stem) has a core of density 1.3-1.6 gm/cc that includes a plurality of strands, each strand including a flexible graphite tape, longitudinally corrugated and folded into at least two longitudinally extending partially superimposed layers. Preferable, each strand is overknitted with a reinforcing wire, the strands in the core are braided, and a jacket, which includes a carbide fiber, an inorganic fiber, and a phenolic fiber, is disposed about the core.

Abstract: A method of forming a sheet of material into a flower pot or flower pot cover comprising means for engaging portions of the sheet of material and forming pleats in predetermined portions of the sheet of material having a predetermined shape whereby the formed flower pot or flower pot cover has pleats in predetermined portions and of predetermined shapes.

Abstract: Cold-stretchable sheet material is isostatically formed at an operating temperature beneath the softening temperature of the sheet material by means of a fluid pressure medium at a pressure of more than 20 bars so as to produce a deep-drawn formed plastics piece. Forming may take place abruptly. The sheet to be formed may be provided with a coating such as an ink imprint. The resulting thin-walled deep-drawn piece may be backed and reinforced by injecting further plastics material.

Abstract: A method and apparatus for treatment of relatively moving substrate materials and the novel products produced thereby created by precise application of high temperature pressurized streams of fluid against the surface of the materials to melt and remove material which imparts a recessed channel to the materials that facilitates separation of the materials. The apparatus includes an elongate manifold for receiving heated pressurized fluid, such as air, disposed across the width of the relatively moving material and having a single slit the full width of the substrate for directing the fluid into the surface of the material. The substrate material is treated with an acrylic resin to eliminate jagged or frayed edges either prior to or after the melting and removal process by means of the high temperature pressurized fluid streams.

Abstract: A method of shaping a thermoformable composite material including a polymeric matrix reinforced with continuous filaments which involves locating the material in overlapping relationship with at least one diaphragm of a thermoformable shaping polymer, heating the assembly to a suitable thermoforming temperature and shaping the assembly against a shaping tool surface in a shaping step of less than two minutes.

Abstract: Process for producing an atmosphere for the manufacture of high performance composite parts, of the type wherein the atmosphere is used in an autoclave above a superposition of cutouts with fibrous structure impregnated with a thermosetting organic material disposed between a lower mold and an upper sealing covering member, the space between the covering member and the mold being under vacuum. The atmosphere is nitrogen gas prepared from raw nitrogen by separation from air through permeation or adsorption, incorporating a residual content of oxygen between 0.5% and 6%, with a low content of water vapor. Application for example to the manufacture of secondary and primary structures in aeronautical and space construction.

Abstract: A method for curing fiber-reinforced resin matrix composite materials (22) includes the steps of providing a form (14) and positioning uncured composite material (22) on the form (14) substantially into a desired shape. The composite material (22) is then cured by providing a fluid bath (10) heated to a predetermined temperature, and heating the composite material (22) by immersing the positioned composite material (22) on the form (14) into the fluid bath (10) for a predetermined time. The predetermined time is sufficient to allow the composite material (22) to become cured and to heat the composite material (22) at a rate sufficient to provide resin flow prior to hardening. Compressive pressure is provided on the composite material (22) while it is immersed in the fluid bath (10).

Abstract: A method for the shaping of a sheet of preform material. A flat planar (heated) sheet of preform material is held tightly between two elastomeric sheets, the sheets and preform material forming a laminate assembly. The laminate assembly is then formed about a mold having the desired contours. The elastomeric sheets maintain the preform material parallel to the surface contours of the mold as the molding process proceeds. A fluid such as air is flowed between the mold surface and the laminate assembly during the forming process to prevent the elastomeric sheets from binding on the mold surface. Wrinkles are eliminated in the final shape of the preform material, and fiber distortion of tears or rips in the material are minimized due to the fluid lubrication between the mold surface and the laminate assembly.

Abstract: Thermoplastic layers are vacuum thermoformed to produce laminated structures by perforating all layers to be formed except the layer outermost from the mold. Thus, the non-perforated layer is attracted to the mold, serving as a diaphragm for the other layers or consolidating therewith to form the desired article.