A production method for a separated fiber bundle includes at least: [A] a partial separation step for obtaining a partially separated fiber bundle in which separation-processed parts, each separated into a plurality of bundles, and not-separation-processed parts are alternately formed along the lengthwise direction of a fiber bundle comprising a plurality of single fibers; and [B] a cutting step for cutting the not-separation-processed parts of the partially separated fiber bundle formed in the step [A] along the lengthwise direction of the fiber bundle. A separated fiber bundle produced by the method, a fiber-reinforced resin molding material that uses the separated fiber bundle, and a production method for the fiber-reinforced resin molding material.

A production method for a separated fiber bundle includes at least: [A] a partial separation step for obtaining a partially separated fiber bundle in which separation-processed parts, each separated into a plurality of bundles, and not-separation-processed parts are alternately formed along the lengthwise direction of a fiber bundle comprising a plurality of single fibers; and [B] a cutting step for cutting the not-separation-processed parts of the partially separated fiber bundle formed in the step [A] along the lengthwise direction of the fiber bundle. A separated fiber bundle produced by the method, a fiber-reinforced resin molding material that uses the separated fiber bundle, and a production method for the fiber-reinforced resin molding material.

A method for forming a resin-based composite structure is provided. The method includes: providing a prepreg layup, wherein the prepreg layup includes an epoxy resin-carbon fiber composite material; covering a thermal-fusion material on a surface of the prepreg layup; and performing a molding and curing process to fuse the thermal-fusion material with the prepreg layup. Wherein the molding and curing process includes: heating at a first temperature to melt, soften and fully fuse the thermal-fusion material with the prepreg layup; and heating at a second temperature to solidify the thermal-fusion material for forming the resin-based composite structure. Wherein the first temperature is lower than the second temperature.

Compositions comprising a fiber component, optionally a dispersing agent operable to disperse the fiber component to create a fiber matrix, a starch component distributed essentially throughout the fiber matrix, and a filler component are disclosed. Methods of forming articles such as containers and packages from such compositions are also disclosed.

Compositions comprising a fiber component, optionally a dispersing agent operable to disperse the fiber component to create a fiber matrix, a starch component distributed essentially throughout the fiber matrix, and a filler component are disclosed. Methods of forming articles such as containers and packages from such compositions are also disclosed.

A stiffened part formed from at least two members of thermoset composite material including at least one body of a first structure and optionally a second structure. A manufacturing method includes: forming a fibre preform and impregnating each body of the first structure with thermosetting resin or forming a pre-impregnated fibre preform to obtain a body formed from uncured thermosetting composite material supported by a mandrel; optionally partially or fully polymerising at least one body supported by a mandrel; optionally, providing the second structure formed from uncured, partially uncured or fully uncured thermosetting composite material; optionally, depositing a layer of uncured thermosetting adhesive on an area where a fully cured member makes contact with another member of the part; joining the members, each member being juxtaposed with; or stacked upon, at least one other member; fully curing the assembly by heat treatment; removing the mandrel from each fully cured body.

The invention relates, among other things, to a method of making a thin panel (10) for outdoor applications, comprising, among other things, the following steps: a) providing a deep-drawable film (10) of a transparent plastic, b) deep-drawing the film (11) in a mold (34), c) mounting a structure (19) having solar cells (32) on an inner face (16) of the deep-drawn film (12), d) placing the deep-drawn film (12) with mounted structure (19) in a cavity (33) of a mold (34) having in particular at least two mold halves (13, 14), e) introducing a liquid polyurethane casting compound (24) into the cavity (33) of the mold (34) and spreading the polyurethane casting compound (24) over an inner face (18) of the structure (19) and/or over the inner face (16) of the film (12), f) curing the polyurethane casting compound, in particular with the mold closed, to form a reinforcement layer (30), or comprising the following steps j) and k) instead of the steps e) and f): j) introducing a granular particle foam mass into the cavity (33) of the mold (34) and spreading over an inner face (18) of the structure (19) and/or over the inner face (16) of the film (12), k) baking and curing the particle foam mass, in particular with the mold closed, to form a reinforcement layer (30).

Rotor blade panels, along with methods of their formation, are provided. The rotor blade panel may include one or more fiber-reinforced outer skins having an inner surface; and, a plurality of reinforcement structures on the inner surface of the one or more fiber-reinforced outer skins, where the reinforcement structure bonds to the one or more fiber-reinforced outer skins as the reinforcement structure is being deposited. The reinforcement structure includes, at least, a first composition and a second composition, with the first composition being different than the second composition.

The present invention is a structure element comprising a body made of composite material and at least one connection member which is one-piece with said body and which is for providing connection to another structure element with the same characteristic. Accordingly, the composite material is BMC material using bulk material, and the bulk material comprises at least one type of fiber between 15% and 25% for providing resistance, at least one type of mineral powder between 40% and 50% as filling material, and at least one type of resin between 20% and 30% as the binding item which binds fiber to filling material.

A composite structural article (100) includes a polymeric body (35) having a first major surface (24) and an opposing second major surface (22) and a rib element (30) extending away from the first major surface. A reinforcing member (10) is embedded within a free end portion (34) of the rib member (30). The reinforcing member includes an elongated polymer rod having a rod length and a plurality of co-extending continuous fibers (20), embedded and distributed within the elongated polymer rod. The fibers are under tension and may have a helical or twisted configuration along the rod length.