A high-pressure tank fabrication method includes a pre-form fabrication step and a molding step. In the pre-form fabrication step a pre-form is fabricated by winding dry fiber bundles with different thicknesses (first fiber bundles and second fiber bundles) onto a liner in a state in which the dry fiber bundles with different thicknesses are made to be adjacent to one another. In the molding step, molding includes disposing the pre-form fabricated in the pre-form fabrication step in a mold and injecting resin.

A method for producing a composite material in which a first fabric and a second fabric made from a fiber material are impregnated with a thermosetting resin and integrally molded, wherein a resin flow path through which thermosetting resin flows is provided between the first fabric and the second fabric, and the first fabric and the second fabric are impregnated with thermosetting resin from the resin flow path as well as being impregnated with thermosetting resin from the surface.

This invention relates to a method of manufacturing a wind turbine blade and a wind turbine blade thereof. A central core element and a plurality of side core elements are sandwiched between first layers and second layers of a first fibre material. The central core element is spaced apart from the side core elements to form a first and a second recess. This sandwich structure is then impregnated with a first resin and cured in a first step. Layers of a second fibre material of a first and a second main laminate are laid up in the first and second recesses. The first and second main laminates are then impregnated with a second resin and cured in a second step.

An actuatable flow media for the control of a flow rate of a liquid through the flow media, the actuatable flow media comprising a base having at least one cavity formed therein, at least one aperture formed in the cavity defining a liquid flow path for the entry of liquid into or exit of liquid from the flow media; a flexible membrane arranged in spaced relation with the base and defining a liquid flow path through the flow media; and an elastically deformable element arranged in the cavity and extending between the base and the flexible membrane for actuation between at least a first configuration in which the element is substantially undeformed and the liquid flow path through the at least one aperture is open and a second configuration in which the element is substantially deformed and the liquid flow path through the at least one aperture is closed.

A flow medium for assisting a resin to be transferred into a mold accommodating a layered structure of reinforced material is provided. The flow medium is configured such that when the resin is cured the flow medium becomes incorporated within a final composite component comprising the reinforced material embedded within the transferred and cured resin. A semifinished product comprising such a flow medium is provided and a method for producing a composite component by utilizing such a semifinished product is also provided.

A method of manufacturing a composite material 400 provided with a reinforcement 510 and a resin 600 infused into the reinforcement, includes: an applying process of applying an adhesive 520 to the sheet-shaped reinforcement having first and second regions 501 and 502 such that a content density of the adhesive of the second region is lower than that of the first region; a preforming process of forming a preform 500 by preforming the reinforcement; and a process of molding a composite material 400 by infusing the resin 600 into the preform. The resin injected into the cavity easily flows in a portion of the cavity 350 where the second region of the reinforcement is placed, compared to a portion of the cavity where the first region of the reinforcement is placed.

Resin permeation of a dry preform having one or more reinforcement plies is locally influenced during resin infusion using a selectively permeable veil applied to at least one of the reinforcement plies.

A resin supply material is used for molding a fiber-reinforced resin and includes a continuous porous material and a resin. The continuous porous material has a bending resistance Grt of 10 mN.Math.cm or more at 23 C., and a bending resistance ratio Gr of 0.7 or less, the bending resistance ratio Gr being expressed by the formula:
Gr=Gmt/Grt Gmt: bending resistance of continuous porous material at 70 C.

The present invention is directed to multifunctional surfacing films each comprising: (a) a single layer of curable polymer composition having opposing first and second surfaces: (b) a peelable porous sheet disposed at or beneath the second surface; and (d) at least one porous sheet of functional material disposed within the single layer of curable polymer composition and positioned between the first surface and the peelable porous sheet, and methods of making and using such multifunctional surfacing films.

A resin supply material used for press molding or vacuum-pressure molding of a fiber-reinforced resin includes a reinforcing fiber base material and a thermosetting resin, wherein a tensile rupture strain of the reinforcing fiber base material is 1% or more at temperature T, and/or a tensile strength of the reinforcing fiber base material is 0.5 MPa or more at the temperature T, wherein Temperature T is a temperature at which the viscosity of the thermosetting resin is minimum in heating of the thermosetting resin at a temperature elevation rate of 1.5 C./minute from 40 C.