A method for curing a composite panel, including the steps of inserting a Biaxially Oriented Polypropylene release film into a mold, and curing the panel using a cold-in/cold-out process at a lowermost temperature within the panel's temperature curing range. The process further includes the use of a twice smoothed caul sheet, where the smoothing includes a coarse sanding and a fine sanding.

A vessel for storing pressurized gas. The storage vessel may be manufactured in a variety of predetermined shapes. Plural frame members are interconnected with each other, collectively forming a lattice frame. A network of internal supports is disposed within the interior of the lattice frame, the internal supports being made of a carbon-reinforced composite material. The storage vessel has an outer shell made up of layers of carbon-reinforced composite material sheets enveloping the exterior of the lattice frame.

Lining hose for the renovation of fluid carrying pipe systems comprising at least one resin impregnated fiber hose and, optionally, a reinforced or unreinforced inner tubular foil hose on the side of the resin impregnated fiber hose oriented towards the flowing medium, wherein nanoparticles are added to the resin used for impregnation or to the inner tubular foil hose or to both.

Provided is a glass resin laminate (1), including: a resin layer (2); a glass sheet (3); an adhesive layer (4) configured to bond the glass sheet (3) and the resin layer (2); and a functional film (5) interposed in the adhesive layer (4). The adhesive layer (4) includes a first portion (4a) positioned between the resin layer (2) and the functional film (5), a second portion (4b) positioned between the glass sheet (3) and the functional film (5), and a fused portion (4c) obtained by fusing an end portion of the first portion (4a) and an end portion of the second portion (4b).

Provided is a glass resin laminate (1), including: a resin layer (2); a glass sheet (3); an adhesive layer (4) configured to bond the glass sheet (3) and the resin layer (2); and a functional film (5) interposed in the adhesive layer (4). The adhesive layer (4) includes a first portion (4a) positioned between the resin layer (2) and the functional film (5), a second portion (4b) positioned between the glass sheet (3) and the functional film (5), and a fused portion (4c) obtained by fusing an end portion of the first portion (4a) and an end portion of the second portion (4b).

A composite projectile barrel having an inner barrel section and a composite outer barrel shell aligned coaxially with the inner barrel section is described. The inner barrel section may be made from a metal or metal alloy. The composite outer barrel shell may include two or more layers of carbon fiber prepreg and a layer of non-woven nanofiber web membrane disposed between adjacent layer of carbon fiber prepreg. The carbon fiber prepreg can include a weave of carbon fibers in a nanoparticle-reinforced resin matrix, with the resin content being less than or equal to 35 wt % of the carbon fiber content. The non-woven nanofiber web membrane can be Xantu.layr.

A reinforcing method and structure for a steel structure and an elastic layer forming material for reinforcing a steel structure are provided that can prevent a reinforcing effect from being lowered by direct sunlight, can obtain a sufficient reinforcing effect, and can prevent a fiber sheet from being peeled away from a steel structure surface before the fiber sheet is torn. The reinforcing method for a steel structure, in which a fiber sheet including reinforcing fibers is bonded to a surface of the steel structure to integrate the fiber sheet with the steel structure, includes (a) a step of applying and hardening a polyurea resin putty to the surface of the steel structure to form an elastic layer, and (b) a step of bonding the fiber sheet to the surface of the steel structure having the elastic layer formed thereon with an adhesive agent.

A helmet shell is formed having an outer section of fibrous layers, a middle section of fibrous layers and an inner section of fibrous layers. The outer section layers contain high tenacity abrasive fibers in a resin matrix. The middle section layers contain high strength polyolefin fibers and are in the form of woven or knitted fabrics with a resin matrix. The inner section layers contain high strength polyolefin fibers and are in the form of non-woven fabrics with a resin matrix. The helmet is lightweight and resists penetration of rifle bullets.

Broadband reflectors include a UV-reflective multilayer optical film and a VIS/IR-reflective layer. In various embodiments, the VIS/IR reflective layer may be a reflective metal layer or a multilayer optical film. Concentrated solar power systems and methods of harnessing solar energy using the broadband reflectors and optionally comprising a celestial tracking mechanism are also disclosed.

A repair apparatus for an electrically conductive layer of a composite structure includes a dielectric layer, having a perimeter, secured to the composite structure, a first adhesive layer, and a conductive layer, secured over the dielectric layer and to the composite structure via the first adhesive layer around an entirety of the perimeter of the dielectric layer, the first adhesive layer being scored along a perimeter region thereof to improve a conductive path between the conductive layer and the composite structure.