2648 results about "Fibre reinforcement" patented technology

A composite composition and a method of making such a composite that is composed of a matrix material and dispersed reinforcement nanotubes that are substantially aligned along at least one specified direction or axis. Also a method for making a continuous fiber-reinforced composite object by combining a reinforcement fiber tow with a solidifying matrix material to form a pre-impregnated tow or towpreg, providing a dispensing head capable of dispensing the towpreg onto a base member positioned a distance from this head with the head and base member being driven by motion devices electronically connected to a motion controller regulated by a computer, and operating and moving the head relative to the base member to dispense multiple layers of towpreg in accordance with a CAD-generated deposition path along which the dispensing head can be allowed to trace out individual layers by following a selected algorithm so that the number of path interruptions at which the towpreg must be tentatively cut off from the dispensing head is minimized.

A composite formed of a polymer matrix phase having a reinforcement phase including polymeric microfibers. The microfibers are preferably formed of a highly oriented polymer, having a high modulus value and a large surface area. The large surface area can serve to tightly bind the microfibers to the polymer matrix phase. The microfibers can be provided as a fully- or partially-microfibrillated film, as a non-woven web of entangled microfibers, or as a pulp having free fibers. The microfibers can be embedded in, or impregnated with, a polymer or polymer precursor. Some composite articles are formed from thermoset resins cured about a highly oriented polypropylene microfiber reinforcement phase, providing a strong, tough, moisture resistant article. One composite includes a matrix and reinforcement formed of the same material type and having substantially equal refractive indices, allowing the composite to be optically clear.

The invention relates to a preparation method of a continuous fiber reinforced thermoplastic composite material prepreg and equipment thereof. The method comprises the following steps: (a) leading out and unfolding continuous fiber from a creel (10) to pass a tension adjusting device (20) and a static elimination device (30) in sequence, sending the fiber to a preheating oven (40) to preheat, and then passing a tension adjusting device (50); (b) leading a preheated continuous fiber band into a dual-extrusion die head set which can be opened and closed in a staggered manner to presoak; and (c) leading the presoaked continuous fiber band into a soaked rolling roll set (70) to soak, then cooling by a cooling roll-in device (80), and finally leading into a traction rolling device (90) for shaping by winding to obtain the product. Compared with the prior art, the invention significantly improve the dispersion, infiltrating property and operability of the fiber, and obtains the continuous fiber reinforced thermoplastic composite material prepreg which has uniformly dispersed and completely soaked fiber.

Layers of unidirectional (UD) fiber prepreg are formed into a pre-plied, multi-directional, continuous fiber laminate that is used as a molding compound to form three dimensional structures. Cut-outs from the laminate are slotted and folded along fold lines to provide near-net-shaped preforms that may be compression molded to form fiber-reinforced composite structures having complex shapes.

A sandwich structure (III) which has a core material (I) and, arranged on the both surfaces of said core material (I), a fiber-reinforced material (II) composed of a continuous reinforcing fiber (A) and a matrix resin (B), wherein the above core material (I) comprises a void. The void is formed by bubbles of a foamed material or, the core is composed of a discontinuous reinforcing fiber and a thermoplastic resin and the void is formed by interstices formed at crossings of filaments of said reinforcing fiber.

A fiber-reinforced ceramic matrix composite material exhibiting increased matrix cracking strength and fracture toughness is produced by sequentially depositing a plurality of 5-500 nanometer-thick layers of a primary ceramic matrix material phase periodically separated by 1-100 nanometer-thick intermediate layers of a secondary matrix material phase onto the reinforcing fibers upon their consolidation. The resultant nanolayered matrix enhances the resistance to the onset of matrix cracking, thus increasing the useful design strength of the ceramic matrix composite material. The nanolayered microstructure of the matrix constituent also provides a unique resistance to matrix crack propagation. Through extensive inter-layer matrix fracture, debonding and slip, internal matrix microcracks are effectively diverted and/or blunted prior to their approach towards the reinforcing fiber, thus increasing the apparent toughness of the matrix constituent. This unique toughening mechanism serves to dampen energetic co-planar macrocrack propagation typically observed in conventionally manufactured ceramic matrix composites wherein matrix cracks are usually deflected at the fiber/matrix interphase region.

A thermal treatment process for improving thermo-mechanical properties of ceramic matrix composite materials such as silicon carbide (SiC) matrix composites is described. The treatment process removes excess silicon and/or other process-related defects from the SiC-based matrix as well as the fiber interfacial coating. This invention can be practiced with minimal strength loss for as-fabricated composites formed from high-strength continuous-length ceramic and carbon-based fibers that are functionally stable to 1600° C. and above. The invention provides a method for significantly improving composite thermal conductivity and creep resistance, and for reducing composite porosity. It has been demonstrated using state-of-the-art 2D woven SiC/SiC composites containing Sylramic-iBN SiC fibers, boron-nitride-based interfacial coatings, and hybrid matrices that are based on SIC formed by chemical vapor infiltration (CVI) and by a combination of CNI, SiC particulate infiltration, polymer infiltration and pyrolysis, and melt infiltration of silicon, silicon-based alloys, and silicides.

The invention relates to a fiber reinforced cement composite concrete precast construction member (PC-FRC) and a production method thereof, which are suitable for engineering of building exterior wall decoration, building structure containment, and energy conservation and heat preservation, are particularly suitable for prefabricated housing industrialization projects and are suitable for the fields of people's livelihood such as natural disaster prevention and post-disaster reconstruction. The fiber reinforced cement composite concrete precast construction member comprises a decorative finish layer, a fiber reinforced cement layer, a concrete structure layer, a heat preservation layer and a steel reinforcement framework, wherein the fiber reinforced cement layer is composited on the decorative finish layer and is connected with the concrete structure layer; the heat preservation layer is laid in the concrete structure layer and is completely coated by the concrete structure layer; the steel reinforcement framework is laid in the concrete structure layer; and the fiber reinforced cement layer, the heat preservation layer and the concrete structure layer are composited and molded in molds with models. According to the fiber reinforced cement composite concrete precast construction member, the connecting part of the surface of the precast construction member is provided with exposed steel reinforced bars, and the exposed steel reinforced bars are used for connecting precast pieces with building structures during building assembly; and suspension embedded pieces are laid in the concrete structure layer.

The invention provides a resin composition for a fiber reinforced composite which can be used to produce a prepreg excellent in tackiness, drapability and windability around a mandrel, and also provides a prepreg in which reinforcing fibers are impregnated with a resin composition, and a fiber reinforced composite obtained from them. The resin composition includes a thermosetting resin and a thermoplastic resin with a weight average molecular weight of 200,000 to 5,000,000.

The invention discloses a continuous fiber composite high thermal conductive material and a processing technology thereof. When the continuous fiber is non-thermal conductive fiber, the high thermal conductive material comprises, by weight, 20%-60% of the continuous fiber, 0%-5% of a surface-treating agent, 5%-30% of a plastic raw material, 0%-5% of auxiliary agents, 20%-75% of thermal conductive filler and 0%-15% of an impact-resistant modifier; and when the continuous fiber is thermal conductive fiber, the high thermal conductive material comprises, by weight, 20%-70% of the continuous fiber, 0%-5% of the surface-treating agent, 10%-60% of the plastic raw material, 0%-5% of the auxiliary agents, 0%-50% of the thermal conductive filler and 0%-15% of the impact-resistant modifier. The processing technology is shown in the description. Continuous fiber-reinforced high thermal conductive plastic blend with high strength, low temperature resistance and good impact resistance can be prepared by a continuous fiber production device. The continuous fiber-reinforced high thermal conductive plastic blend contains relatively long fiber; and the length of the fiber is the same as that of particles. By adding the thermal conductive fiber, a thermal conductive coefficient can be controlled at 2-120 w/(m.k) and even higher.

The invention discloses a glass fiber reinforced polypropylene composite material with low odor and a preparation method thereof. The glass fiber reinforced polypropylene composite material comprises the following components: 32-91% of polypropylene resin, 5-50% of glass fiber, 2-8% of compatilizer, 1-6% of odor inhibitor and 1-4% of other auxiliary agent. The reinforced polypropylene material with low odor is prepared by fusing, extruding and granulating the components through a double screw extruder under the temperature control condition of 220-240 DEG C. The odor inhibitor comprises 30-50% of ricinoleic acid zinc, 20-40% of metal oxide and 10-30% of a clay mineral system. The odor of the glass fiber reinforced polypropylene composite material can be inhibited through combining a physical method and a chemical method. The glass fiber reinforced polypropylene composite material prepared by the method has excellent odor performance; the odor level can be reduced below level 3; the physical property of the glass fiber reinforced polypropylene composite material per se is not influenced after the odor inhibitor is added; and the application field of the glass fiber reinforced polypropylene material in vehicle interior trim parts and a part of home appliance parts can be widened.

A flame-retarding antistatic composite PVC pipe with high strength and toughness is composed of internal layer, reinforcing fibre or fabric layer and external antistatic layer. It can be made up by coextruding out method or layer-by-layer coating method.

The invention relates to a continuous fiber fabric reinforced thermoplastic resin composite material and a production method thereof. The composite material is produced from continuous fiber through thermoplastic resin melting and impregnating, cooling and molding, with the thickness of 0.20mm-0.35mm, wherein the content of the continuous fiber reinforced fabric is 40wt%-65wt%, the continuous fiber fabric is uniformly spread out and subjected to tension adjustment and static electricity elimination, then enters thermoplastic resin for melting and impregnating, and finally is cooled in a cooling unit and wound and formed to obtain the continuous fiber fabric reinforced thermoplastic resin composite material. Compared with the prior art, the continuous fiber fabric reinforced thermoplastic resin composite material and the production method solve a series of problems caused by too high resin viscosity in the existing thermoplastic resin and fiber reinforcing process, such as complex equipment process, too high equipment cost, not environment-friendly technological operation process, dry gauze easily caused by poor impregnation and the like.

The invention relates to a recycled carbon fiber reinforced thermoplastic resin composite material and a preparation method thereof. The preparation method comprises the following steps: (1) weighing 5-40 parts of recycled carbon fiber according to a proportion, adding the recycled carbon fiber into a high-speed mixer, adding 0.1-3 parts of surface treating agent, and performing surface treatment on the recycled carbon fiber; (2) weighing 60-95 parts of thermoplastic resin, 0-30 parts of flexibilizer, 0-20 parts of fire retardant, 0-0.5 part of anti-drip agent, 0.1-0.6 part of lubricant, 0.1-0.5 part of antioxidant and 0-20 parts of filler according to the proportion, adding the raw materials into the high-speed mixer, and uniformly mixing the raw materials; (3) adding the uniformly mixed raw materials into a double-screw machine, and performing melt blending, extrusion, water cooling and strand pelletizing to obtain the recycled carbon fiber reinforced thermoplastic resin composite material. Compared with the prior art, the recycled carbon fiber reinforced thermoplastic resin composite material has the advantages of low density, excellent mechanical performance, low cost and the like.

A composite material is provided in which certain properties, or combinations of properties, are improved relative to similar comparative composite materials. The composite material generally comprises a fiber reinforced thermoplastic core that includes a thermoplastic resin and discontinuous fibers dispersed within the thermoplastic resin. The fibers are particularly subject to certain conditions, namely a content of about 15 wt. % to about 65 wt. % of the thermoplastic core, a diameter of from about 17 μm to about 22 μm, and a length of from about 17 mm to about 25 mm. By including fibers meeting these characteristics, the present invention composite material exhibits improved maximum flexural stiffness at reduced basis weight compared to a comparative composite material comprising a fiber reinforced thermoplastic core differing from the composite material only in that the fiber reinforced thermoplastic core of the comparative composite material does not contain fibers meeting the content, diameter and length conditions of the fibers in the thermoplastic core of the composite material.