Abstract: A casing shell for electrical measuring, control or communication devices, in particular the casing module of a cell phone, has a high bending and torsional stiffness despite extremely low wall strength with a completely flat outside surface, since the flat blank of a fiber-reinforced matting in an injection mold is back-injected along the matting edge area in striplike form with a preferably also fiber-reinforced frame, including molded functional elements and preferably comprising the cut edges of the matting in an L-shape.

Abstract: A composite structure is provided. The structure includes at least one ply of preimpregnated material formed into a curved elongated member of continuous fibers onto a mandrel. The fibers have a select orientation. The curved elongated member has a length and a cross-sectional geometry that varies along the length.

Abstract: A method of decorating a molded article is provided that includes the steps of: (a) providing a mold insert comprising a plurality of flock fibers and a permanent adhesive layer; (b) positioning the mold insert in a mold; and (c) introducing resin into the mold, such that a resin contacts the mold insert to form a molded article. The melting point of the permanent adhesive layer is preferably greater than a temperature of the resin during molding.

Abstract: A method of producing a vehicle interior panel having a hollow double-walled structure made of thermoplastic comprising, blow molding with a pair of mold halves including a first mold with a shape transfer surface having a three dimensional pattern, and a second mold, clamping a cover material being formed by at least a double-layer structure arranged between a cavity of said first mold and a parison of thermoplastic such that a resin sheet layer without a through hole and without a three dimensional pattern faces a cavity of said first mold, introducing a pressurized fluid into the parison to press the cover material and the parison against a cavity surface, thereby integrally laminating said cover material to an outer surface of a first wall of the panel having the hollow double-walled structure and transferring said three dimensional pattern of said first mold half to said resin sheet.

Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.

Abstract: A method for manufacturing a fiber-reinforced composite material of the present invention includes: the step (a) of placing a non-woven fabric N made of a reinforcement fiber in a movable mold 12; and the step (b) of moving the movable mold 12 toward a fixed mold 11 to close the mold and then injecting a thermoplastic resin into the mold to obtain a molded article formed of the non-woven fabric N and the thermoplastic resin. The mechanical strength of the obtained fiber-reinforced composite material can be enhanced by applying an injection compression molding process as the injection molding process in the step (b).

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: The invention relates to a method for the injection moulding of plastic parts from thermoplastic material. To produce stable plastic parts with a low density, the method comprises the steps: a) Production of thermoplastic melt; b) Adding of a fluid to the thermoplastic melt; c) Mixing of the thermoplastic melt containing the fluid; d) Providing of an injection moulding tool with a cavity, wherein the volume of the cavity of the injection moulding tool is expandable from an initial volume to an end volume; e) Heating of at least a part of the walls of the cavity; f) Injection of the mixture from thermoplastic melt and gas into the cavity, wherein the volume of the cavity takes the initial volume; g) Expansion of the volume of the cavity; h) Cooling of at least a part of the walls (9) of the cavity; i) Demoulding of the injection moulded plastic part after the plastic melt is at least partially solidified.

Abstract: Microfluidic devices in which electrokinetic mechanisms move droplets of a liquid or particles in a liquid are described. The devices include at least one electrode that is optically transparent and/or flexible.

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 method and apparatus for manufacturing composite components. A tool is present for use in manufacturing composite components. The tool comprises an encapsulation layer having a shape, an insulation layer on the encapsulation layer, and an isolation layer on the insulation layer. The isolation layer has an outer surface capable of contacting a composite material laid up on the outer surface. The insulation layer is capable of insulating the encapsulation layer from heat applied to the composite material. The encapsulation layer is capable of maintaining a shape with the composite material laid up on the isolation layer during a curing process to form a composite component from the composite material.

Abstract: A complex-shaped, three-dimensional fiber reinforced composite structure may be formed by using counteracting pressures applied to a structural lay-up of wetted fibers. The wetted fibers are arranged on pressurizable members and may be configured to include internal structural features, such as shear webs. A reinforcement stiffener may be located adjacent to at least one of the pressurizable members and the wetted fibers that form the internal structural feature. The reinforcement stiffener includes a modulus of elasticity that is substantially higher than a modulus of elasticity of the resin used to wet the fibers. In one embodiment, the reinforcement stiffener may be received in a pocket of one of the pressurizable members and may include a releasing agent that permits removal of the stiffener after the composite structure has been pressurized and cured.

Abstract: The present invention relates to the field of overmolded polyamide composites structures and processes for their preparation. The disclosed overmolded composite structures comprise a first component having a surface, which surface has at least a portion made of a surface polyamide resin composition, and having a fibrous material impregnated with a matrix resin composition, and comprise a second component comprising an overmolding resin composition. The second component is adhered to the first component over at least a portion of the surface of said first component. One of the overmolding resin composition and the surface polyamide resin composition is made of a polyamide composition comprising a blend of one or more semi-aromatic polyamides (A) and one or more fully aliphatic polyamides (B) and the other of the overmolding resin composition and the surface polyamide resin composition is made of one or more polyamides.

Abstract: A fabrication method of forming curved thermoplastic composite laminate parts with tailored and varying thickness in a continuous process. Automated equipment or hand lay-up are used to collate parts or components into a multi-layer stack. Each stack contains all plies, including ply build-up areas, tacked in the proper location to maintain orientation and location. Ply consolidation tooling contains all necessary part features and is coordinated to the customized multiple ply stacks to form a single integrated thermoplastic composite laminate potentially having areas of differing thickness from the multiple ply stacks.

Abstract: A process for the production of in particular fiber-reinforced thermoplastic parts in an injection molding machine, wherein the process includes bringing together a polymeric precursor, an activator and a catalyst, wherein the injection molding machine has a first plasticising screw and a second plasticising screw respectively arranged in a plasticising cylinder, wherein the polymeric precursor and the activator are mixed with the first plasticising screw without addition of the catalyst and are substantially liquefied and the polymeric precursor and the catalyst are mixed with the second plasticising screw without addition of the activator and are substantially liquefied, whereupon the contents liquefied with the two plasticising screws are mixed and jointly introduced into an injection molding mold and substantially only there polymerised to afford the plastic part.

Abstract: A method of making a lasted skate boot comprising: (a) providing a male-female mold having male and female sections for defining a mold cavity therebetween, the male section having sides, a rear portion and a bottom portion for defining a three dimensional shape corresponding to the external three dimensional shape of the foot, the female section defining a recess for receiving the male section, the male section comprising a plurality of inner channels for admitting liquid plastic material in the mold cavity; (b) providing a pre-cut sheet made of cloth material laminated to a support made of non-woven fabric; (c) placing the sheet on the male section of the mold such that the non-woven fabric contacts the sides and rear portion of the male section of the mold; (d) closing the male and female sections of the mold; (e) injecting liquid plastic material in the inner channels such that the liquid plastic material spreads on the sheet, pushes the sheet against the recess of the female section of the mold, fills th

Abstract: A method of manufacturing a panel made of a composite material using a tool having a support on which a lay-up is performed, the lay-up producing a stack of plies of fiber prepregs, followed by consolidating the stack aiming to obtain the panel using a compacting plate arranged above the stack. The method is implemented such that a first set of polyimide films partially covering each other is located in contact with the stack of plies, between the latter and the compacting plate.

Abstract: A method for forming temporary protective coatings and bondable surfaces is disclosed. In the method, a soluble layer is disposed on a material surface, such as the interior surfaces of cell walls of a web material. The soluble material is then removed or leached from the web material to form and expose a roughly textured, bondable surface for bonding with another material, such as AVCOAT insulation. Use of the soluble layer, therefore, enhances the bondability of any surface that requires good adhesion, such as where the surface is difficult to reach for conventional surface preparation techniques.

Abstract: A sheet for a fiber-reinforced resin according to the present invention includes a conjugate fiber that contains a low melting point polymer component and a high melting point polymer component. The low melting point polymer component and the high melting point polymer component are polymers of the same type. When the sheet is formed into a fiber-reinforced resin molded article, the low melting point polymer component serves as a matrix resin, while the high melting point polymer component serves as a reinforcing fiber. The conjugate fiber is arranged in at least one direction. A fiber-reinforced resin molded article according to the present invention is obtained by heating the sheet for a fiber-reinforced resin to a temperature equal to or higher than the melting point of the low melting point polymer component and lower than the melting point of the high melting point polymer component, followed by compression molding.

Abstract: A system for removing a cured composite object from a mandrel is provided. The system includes a collapsible shell, wherein an inner surface of the shell is configured to slide over an outer surface of the mandrel and an outer surface of the shell is configured to have the composite object formed thereon. The system further includes an extractor comprising a first and second disk disposed along a rod, and an adjuster, wherein the second disk is configured to engage an end of the mandrel and the adjuster is configured to move the first disk along the rod relative to the second disk. The system further includes a spacer configured to fit between the first disk and a first end of the shell when the shell is placed on the mandrel. The spacer pushes the shell and the composite object formed thereon off of the mandrel when the adjuster moves the first disk towards the second disk.

Abstract: A composite member for a vehicle body a method for manufacturing such a composite member, in particular, for a vehicle roof, with a fiber-free outer skin (12) and a fiber-reinforced support layer (16), which is deposited at the inner side of the outer skin in order to support the outer skin. The side of the support layer (16) that faces away from the outer skin (12) is provided with a fiber-reinforced reinforcing layer (18) for reinforcing the support layer. The reinforcing layer has a higher fiber concentration than the support layer.

Abstract: A recycling compound tube member fabrication method includes the steps of a) covering a core tube member with a strippable layer; b) wrapping a glass fiber cloth about the strippable layer; c) putting the core tube member with the wrapped glass fiber cloth in the cavity of a hot press mold and evenly covering the glass fiber cloth with a thermoplastic material in the cavity of the hot press; d) closing the hot press mold and heating the hot press mold to fuse the thermoplastic material and the glass fiber cloth; and e) cooling down the hot press mold and then removing the molded tube member from the hot press mold and removing the core tube member from the molded tube member.

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: A utility glove comprising a three dimensional molded portion formed of an elastomeric material molded onto a fabric material, wherein the molded portion has a thickness of from about 0.8 to about 10.8 mm with the elastomeric material including two or more areas of differing thicknesses within the range of from about 0.4 to about 10.0 mm. The molded portion of the utility glove has a concave palm, with the middle of the palm being set in from the edges to form a concave configuration. The utility glove is manufactured by placing a glove blank comprising a fabric material over a first mold part in the form of at least a portion of a hand and bringing at least one second mold part into molding engagement with the first mold part to create a cavity with the glove blank on the first mold part. The elastomeric material is then injected into the cavity to form a molded portion, wherein the elastomeric material is injected on the side of the fabric material opposite the first mold part.

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: The present invention provides a paper container and a method of making the same. The method comprises the steps of preparing a mold; sending paper into the mold; injecting plastic material after closing the mold; and opening the mold to acquire a paper container. Thereby, the plastic material can be connected between two distal ends of the paper. So the connection part of the paper is smooth and flat without any bumps, and the paper container has a good waterproof structure.

Abstract: The present invention provides a resin composition for a fiber-reinforced composite material, which has excellent fluidity and impregnation into a fiber base material and which produces a cured product having excellent heat resistance. A resin composition for a fiber-reinforced composite material contains, as essential components, a poly(glycidyloxyaryl) compound (A), a polymerizable monomer (B) which is an unsaturated carboxylic acid or an anhydride thereof and has a molecular weight of 160 or less, an aromatic vinyl compound or a (meth)acrylate (C), and a radical polymerization initiator (D), wherein an equivalent ratio [glycidyloxy group/acid group] of a glycidyloxy group in the component (A) to an acid group in the component (B) is 1/1 to 1/0.48, and a molar ratio [(B)/(C)] of the component (B) to the component (C) is in the range of 1/0.55 to 1/2.

Abstract: A method for making a mat includes preparing a primary material and a secondary material, mixing the primary material and the secondary material, binding the primary material and the secondary material, thermosetting the primary material and the secondary material to form a molding material of a soft thin substrate layer, combining a cloth surface layer and a waterproof film to form a combination, placing the combination of the cloth surface layer and the waterproof film in a mold, filling the molding material of the soft thin substrate layer into the mold, and injection molding the molding material in the mold to combine the molding material with the combination of the cloth surface layer and the waterproof film so as to form a mat which comprises the soft thin substrate layer, the cloth surface layer and the waterproof film.

Abstract: A system for forming a composite structure comprises an electromagnetic press including an upper die, a lower die and an electromagnet. The lower die may be mounted in spaced relation to the upper die for receiving a composite layup therebetween. The electromagnet is energizable such that the upper and lower dies apply a compressive force to the composite layup.

Abstract: An apparatus and method of forming a stringer or an integral stringer and fuselage skin. The apparatus may be a solid bladder made of silicone, urethane, or any similar material or combination thereof. The method may comprise placing composite material onto a surface of a tooling having a channel sized and shaped to correspond to a desired stringer size and shape. Then the solid bladder may be placed onto the composite material relative the channel. The shape of the solid bladder may correspond to the shape of the channel. Composite material may then be placed over the solid bladder, vacuum-sealed against the bladder and the tooling, and cured to harden the composite material, thereby forming a stringer or an integral stringer and fuselage skin.

Abstract: A method for centralising and retaining a molded end coil (20) in a magnet former (12) which includes an oversleeve (24) for retaining the end coil in position, the radially outer (A2) surface of the end coil being of lesser diameter than the radially inner surface of the oversleeve.

Abstract: In accordance with certain embodiments of the present disclosure, a process of forming a prosthetic device is provided. The process includes forming a dispersion of polymeric particles, a fiberizing polymer, and a solvent, the dispersion having a viscosity of at least about 50,000 cPs. A tubular frame is positioned over a tubular polymeric structure. Nanofibers from the dispersion are electrospun onto the tubular frame to form a prosthetic device. The prosthetic device is heated.

Abstract: In accordance with certain embodiments of the present disclosure, a process for forming a multilayered electrospun composite is provided. The process includes forming a dispersion of polymeric particles, a fiberizing polymer, and a solvent, the dispersion having a viscosity of at least about 50,000 cPs. Nanofibers from the dispersion are electrospun onto a first ePTFE layer. A second ePTFE layer is applied onto the nanofibers to form a composite structure. The composite structure is heated.

Abstract: According to the invention, one or more thermoplastic sheets (NdT: “feuilles thermoplastique” in the original) (2) are applied on a flat or curved tool (13), and strips (NdT: “des bande” in the original) of a polymer are applied and pressed onto the sheets (2). They are maintained by suction pumps (8), the orifices (4) of which open into a closed volume or one substantially delimited by a sealing joint (3) and occupied by a draining fabric (7). The heating treatment concomitant to the deposition to harden or consolidate the prepreg softens the sheets (2), distorts them to the curvature of the tool (13) and incorporates them in the structure of the prepreg. Application to methods of draping parts with composite material.

Abstract: Materials and methods are provided for producing preform materials for impact-resistant composite materials suitable for liquid molding. Interlayers formed of nonwoven, continuous fibers, such as spunbonded, spunlaced, or mesh fabric, are introduced between non-crimped layers of unidirectional reinforcing fibers to produce a preform for use in liquid-molding processes to produce a composite member. Curing of the preform provides increased impact resistance by increasing the amount of energy required to propagate localized fractures due to impact.

Abstract: Apparatus 200 for forming a composite component is disclosed, the apparatus comprising: a deformable mould tool 204 that at least partially defines a mould cavity 212; an interface layer 222 formed on an external surface of the mould tool 204; and at least two peristaltic actuators 206, mounted to contact the interface layer 222 and to generate a peristaltic pressure wave in the mould tool 204. The peristaltic actuators may comprise rollers 206, pistons 306 or bi-metallic blocks 406. A method of forming a composite component is also disclosed, the method employing a mould tool 204 that at least partially defines a mould cavity 212. The method comprises: placing reinforcing fibres into the mould cavity 212, forcing a matrix material into the mould cavity 212 through the reinforcing fibres, and generating a peristaltic pressure wave within the mould tool 204 during forcing of the matrix material into the mould cavity 212.

Abstract: A prepreg comprising an epoxy resin (A), a boron chloride-amine complex (B) and a fiber base material (C) is used. Preferably, the molar ratio of boron in the boron chloride-amine complex (B) is 4-7 mol % with respect to the number of moles of epoxy groups in the epoxy resin (A), and the epoxy resin (A) includes a bifunctional epoxy resin with an oxazolidone ring structure, a bisphenol-type epoxy resin and a phenol-novolac-type epoxy resin.

Abstract: A method for fabricating a grid-stiffened structure from fiber-reinforced composite materials. A skin is applied to a smooth, hard base tool. Ribs comprised of carbon-fiber tows are formed on the skin, and shallow cavities are formed between the ribs and the skin. An expansion block is placed in each of the cavities, and is held in place by an elastomeric contact adhesive having adhesive properties that are substantially diminished when the adhesive is heated to an elevated curing temperature. The assembly is then autoclave cured. After cooling, the formed structure is separated from the base tool and the expansion blocks are removed from the cavities. A grid-stiffened sandwich structure is formed by applying an outer skin over the ribs and expansion blocks, before curing the assembly. After cooling, the outer skin is removed to allow extraction of the blocks, and subsequently bonded to the ribs.

Abstract: A machine and a method for forming composite materials are provided. The machine includes a frame and at least one forming beam attached to the frame, the at least one beam being arranged to align with a mandrel. The forming beam is pivotally segmented into at least two segments to conform to the shape of the mandrel, or alternately is bendable to conform to the shape of the mandrel. The mandrel is receivable within the frame in alignment with the forming beam. An apparatus is also provided to position a composite charge over the mandrel, and to position the mandrel within the frame. A further apparatus is provided to transport the mandrel, and to urge the mandrel toward the forming beam, forming a composite charge.

Abstract: Apparatuses, systems and methods for forming elongated composite structural members are provided. One disclosed method includes providing a substantially elongated mandrel having an exterior surface exhibiting a desired geometry. A plurality of plies of fiber material preimpregnated with a thermosetting resin are laid up and pressed onto the mandrel, Pressing the plies of material may include passing one or more rollers over the mandrel and over the plurality of plies along a length of the mandrel. The roller or rollers may be at least partially complementary in shape with the mandrel while maintaining the plies of material in a substantially uncured state during the pressing. The method may include sequentially passing a plurality of rollers over the mandrel and the plies of material. The method may also include configuring a first roller to partially complementarily engage the mandrel and configuring another roller to substantially fully complementarily engage the mandrel.

Abstract: A method for producing a composite structure and a composite structure obtained by the method is described.

Abstract: A polishing pad is provided herein, which may include a plurality of soluble fibers having a diameter in the range of about 5 to 80 micrometers, and an insoluble component. The pad may also pad include a first surface having a plurality of micro-grooves, wherein the soluble fibers form the micro-grooves in the pad. The micro-grooves may have a width and/or depth up to about 150 micrometers. In addition, a method of forming the polishing pad and a method of polishing a surface with the polishing pad is disclosed.

Abstract: The invention relates to composite structures having surface, which surface has at least a portion made of a composition comprising one or more polyamides having an excess of amine end groups such that the ratio of the amine end groups to the acid end groups is at least 1.5:1.0.

Abstract: A method for making a pocket filter assembly is provided. Two side and two end header elements each having a pair of longitudinally extending side walls and a longitudinally extending bottom wall forming a longitudinally extending channel are joined at ends forming a rectangular header with two opposing sides and two opposing ends. The bottom wall and side walls of each of the opposing sides and the bottom walls and said side walls of each of said opposing ends become adjacent forming a rectangular header with a continuous bottom wall and continuous inner and outer side wall having a continuous channel therein. An upstream perimeter portion of a pocket filter element is inserted in the continuous channel and a liquid polymeric material is placed therein. The polymeric material is solidified forming a header frame having the upstream perimeter portion of the filter element unitary therewith.

Abstract: In a method of manufacturing a blade shell half of a pre-bent wind turbine blade by means of vacuum-assisted resin transfer moulding (VARTM), a fibre lay-up (16) is placed on a mould surface (14) and a distribution layer (24) is placed above the fibre lay-up (16). At least one segmentation area is provided in the distribution layer by providing at least one transversely extending flow barrier in the distribution layer (24) preventing or restricting longitudinal resin flow to the distribution layer. A longitudinally extending first feed channel (27) is placed above the distribution layer (24). The first feed channel (27) is divided into at least two feed channel sections, a feed channel section being arranged in each distribution layer segment. A vacuum bag (43) is arranged on top of the mould part (13) to define a mould cavity. The mould cavity (44) is evacuated and liquid resin is supplied to each feed channel section through a resin inlet to fill the mould cavity and impregnate the fibre lay-up.

Abstract: An apparatus for forming a hollow FRP article by internal pressure molding includes a vacuum chamber, a forming die positioned in the vacuum chamber, a vacuum-chamber opening/closing mechanism, a composite-body support device for supporting a composite body without making the composite body come into contact with the forming die in a state where the forming die is opened by the vacuum-chamber opening/closing mechanism, the composite body including an airtight internal-pressure holding tube and a prepreg fitted on said airtight internal-pressure holding tube, an evacuation system for evacuating the vacuum chamber, an internal-pressure supplying device for applying pressure to an inside of the internal-pressure holding tube, and a controller for actuating the vacuum-chamber opening/closing mechanism to clamp the forming die to thereby bring the forming die and the composite body into intimate contact with each other.

Abstract: A method for producing a storage element having a plurality of faces in which a portion of the faces is made in textile material. The method includes the steps of: producing a pattern in textile material, the pattern comprising several panels, placing the pattern in an unfolded condition in an injection mold, injecting a plastic material into the injection mold around the panels so as to overmold at least one portion of each of the panels so as to obtain a pattern comprising the faces in textile and plastic materials of the storage element in the unfolded condition, folding the pattern and attaching the faces to each other.

Abstract: The invention relates to a pressed laminar radicle sheet comprising an extended layer of a reticular mat, originating from a hydroponic seed culture, and sufficient adhesive to form the laminar sheet. The method for the production of said laminar sheet comprises: a) selecting, disinfecting, steeping, airing, sowing and germinating the seeds; b) producing a reticular component formed by a root mat and a low percentage of ungerminated seeds, as well as a leaf component; c) cutting back the leaf growth, leaving only 1 to 1.5 cm height; d) allowing further leaf growth; e) cutting the leaf growth back again, leaving only 1 to 1.5 cm; f) draining, drying and weighing and measuring the reticular mat g) forming the unpressed laminar sheet, adding the adhesive to the reticular mat and pressing said mat with adhesive in a cold press; h) pressing the unpressed laminar sheet with a hot press and leaving said laminar sheet to rest in the cold press.

Abstract: A flexible fibrous material comprises inorganic fibers and a binder and methods of making the same. The binder comprises at least one of: a first organic polymer having anionic groups and a flocculent, the flocculent comprising a second organic polymer having cationic groups; or a reaction product of the first organic polymer and the flocculent. Flexible fibrous material according to the present invention may be used as components in certain pollution control devices.

Abstract: The present invention discloses a resin composition and a prepreg produced using the resin composition. The resin composition comprises, as essential components: 100 parts by mass of a component (A) which is an epoxy resin; 41 to 80 parts by mass of a component (B) which is thermoplastic resin particles; and 20 to 50 parts by mass (in terms of diaminodiphenylsulfone) of a component (C) which is diaminodiphenylsulfone microencapsulated with a coating agent. The thermoplastic resin particles (B) comprise at least thermoplastic resin particles (B1) having an average particle diameter of 1 to 50 ?m and thermoplastic resin particles (B2) having an average particle diameter of 2 to 100 ?m at a mass ratio of 3:1 to 1:3. The average particle diameter ratio D2/D1 of the average particle diameter D2 of the thermoplastic resin particles (B2) to the average particle diameter D1 of the thermoplastic resin particles (B1) is 2 or more.