The present invention relates to a (meth)acrylic mixture for impregnating a fibrous substrate, characterized in that it comprises: a) a first dispersion comprising at least one (meth)acrylic polymer obtained by emulsion polymerization of one or more (meth)acrylic monomers, b) a second dispersion comprising at least one flame retardant. The invention also relates to a method for impregnating a fibrous substrate with a (meth)acrylic mixture of this kind, and to a method for manufacturing mechanical parts or structured elements, or articles, from the (meth)acrylic mixture. Another objective of the invention is a mechanical part or a structured element or an article made of composite material, obtained by the implementation of the manufacturing method.

A method of integrating a first fibrous web with a second fibrous web, said method comprising the steps of: a. providing a first absorbent fibrous web material; b. providing a topsheet comprising a second fibrous web material; c. providing an integrating means; and d. integrating said first absorbent fibrous web material and said second fibrous web material by processing through said integrating means. The step of integrating said first absorbent fibrous web material and said second fibrous web material comprises inter-entangling fibers from the first absorbent fibrous web and fibers from the second fibrous web.

A method of manufacturing a flexible element configured for pressing against composite material received on a mold surface of a mold during cure, including placing a porous material over the mold surface, forming a sealed enclosure containing the mold surface and the porous material, infusing a curable liquid material such as silicone in liquid form into the enclosure under vacuum and through the porous material, curing the liquid material to form the flexible element, and opening the enclosure and disengaging the flexible element from the mold. In a particular embodiment, the flexible element is a pressure pad.

This disclosure relates to a method of utilising waste products in manufacturing. It is particularly suited to manufacturing composite products for applications including, but not limited to, structural, thermal insulation, acoustic insulation and related applications and is described in relation to manufacture in small scale environments but it will be clear that the method and products have broad applications.

A vehicle roof stiffener includes at least one fiber reinforced polymer (FRP) portion and at least one metal or metal alloy portion. The FRP portion includes at least one transition structure including a metal or a metal alloy. At least some of the fibers of the FRP portion are embedded in the transition structure. The metal or metal alloy portion is secured to the transition structure of the FRP portion. In an example vehicle roof stiffener, the metal portion extends parallel to a longitudinal axis of a vehicle, and the FRP portion extends transverse to the longitudinal axis. The example vehicle roof stiffener may include a front FRP portion, a rear FRP portion, and two metal side portions. The metal side portions and the FRP portions may be joined by welding the transition structures to the metal portions.

An enclosure part for an information handling system is disclosed that may include materials formed together into a rectangular shape. The enclosure part may have a void on a core side and a flatness equal to or less than 0.5 mm. The materials may include a sheet of carbon fiber, a piece of non-woven carbon fiber, and a piece of non-woven glass fiber. A method for manufacturing an enclosure part using through-plane temperature control may include inserting into a mold a sheet of carbon fiber and a piece of non-woven carbon fiber, heat pressing the sheet of carbon fiber with the piece of non-woven carbon fiber, and cooling a first portion of the mold including the sheet of carbon fiber and the piece of non-woven carbon fiber more quickly than a second portion of the mold including the sheet of carbon fiber, and removing the enclosure part from the mold.

A paint roller manufacturing system and method are described. In an embodiment, an inner strip of material and an outer strip of material are wound about a mandrel in offset relation. The inner strip of material and the outer strip of material each comprise material that results in a final paint roller which shrinks by less than 2.5 percent of the final paint roller axial length, or which has shrinkage that varies by less +/0.1%, upon hardening and setting. An adhesive is applied to at least a portion of the outer strip as it is wound about the mandrel. A length of fabric is wound about at least the outer strip to form a paint roller tube, and compression is applied to the paint roller tube while advancing the paint roller tube in a direction parallel to the mandrel. A precision measuring or sensing device is used to control a cutting device causing the cutting device to cut the advancing paint roller tube into pre-selected lengths prior to the paint roller tube hardening and setting.

A paint roller manufacturing system and method are described. In an embodiment, an inner strip of material and an outer strip of material are wound about a mandrel in offset relation. The inner strip of material and the outer strip of material each comprise material that results in a final paint roller which shrinks by less than 2.5 percent of the final paint roller axial length, or which has shrinkage that varies by less +/0.1%, upon hardening and setting. An adhesive is applied to at least a portion of the outer strip as it is wound about the mandrel. A length of fabric is wound about at least the outer strip to form a paint roller tube, and compression is applied to the paint roller tube while advancing the paint roller tube in a direction parallel to the mandrel. A precision measuring or sensing device is used to control a cutting device causing the cutting device to cut the advancing paint roller tube into pre-selected lengths prior to the paint roller tube hardening and setting.

A method of manufacturing a cover element for a motor vehicle comprises placing, in a mold, a stack formed at least of a covering material made of textile, of leather, of skin, or of a synthetic material, and of a foam layer at the rear surface of the covering material, the foam layer integrating reinforcing elements.

A pultrusion process for making a strip for an elongate reinforcing structure of a wind turbine blade, the process comprising drawing fibres (42) and resin through a pultrusion die (40) in a process direction to form a strip (102); and applying an infusion-promoting layer (110) to a surface of the strip down-stream from the die in the process direction. A pultrusion apparatus is also disclosed.