A method and apparatus for obtaining carbon fiber from carbon fiber waste (e.g., pre-preg and CFP waste). The method and apparatus selects, or is controlled to select, between using an oxygen free pyrolytic process to volatilize the epoxy resin or other matrix in which the fibers are held to liberate the fibers therefrom and, depending upon the type of pre-preg waste, using a reactor environment where the reactor atmosphere has about 1% to about 2% oxygen by volume. The reactor has a counterflow such that the carbon fibers are moved in one direction and the off gasses are moved in the opposite direction. A combination of steam at the reactor outlet and vacuum pressure at the reactor inlet create the counter flow.

A process for recycling a first article to be recycled including a composite material based on a fibrous reinforcer and a thermoplastic, preferably (meth)acrylic, polymer matrix, wherein the recycling process includes the following steps: introduction of the first article into a system suitable for the recycling of thermoplastic polymer, introduction, into the system suitable for the recycling of thermoplastic polymer, of a second article to be recycled including a thermoplastic polymer resin, and not including any fibrous reinforcer, heating of the articles to be recycled at a given temperature, in the system suitable for recycling thermoplastic polymer, so as to depolymerize the thermoplastic, preferably (meth)acrylic, polymers, and to form base monomers of the thermoplastic polymers, and recovery of the constituent base monomers of the thermoplastic polymers.

A polymer composition containing a thermoplastic polymer and an electromagnetic interference filler is provided. At a thickness of 3.2 millimeters and over a frequency range from 2 GHz to 18 GHz, the composition may exhibit an average absorbency of about 25% or greater and an average electromagnetic interference shielding effectiveness of about 40 decibels or more, as determined in accordance with ASTM D4935-18.

Provided are carbon fibers rich in surface functional groups, which has been recovered by thermolysis and anodization of a carbon-fiber-reinforced composite material. Also provided is a carbon-fiber-reinforced resin composition characterized by having excellent mechanical characteristics and an excellent surface appearance at a low cost as a result of using said carbon fibers.

A secondary shredder can include a rotor assembly that employs a modular rotor design. Each rotor of the rotor assembly can include a number of blades that are symmetrical around a horizontal and a vertical axis. Each rotor can include a number of radial extensions forming gaps into which the blades insert. The blades can be secured within the gaps by wedges that apply an inward force against the blades when the wedges are secured into the gaps. The radial extensions and blades can include keyways into which keys insert to prevent the blades from escaping the gaps. The secondary shredder may also include a stationary knife assembly that includes multiple stationary knives that are positioned on the same side of the rotor assembly.

The present technology provides a carbon fiber reinforced plastic that includes carbon fibers covalently bonded to an energetic polymer and a polymer matrix. Also described is a method for recycling carbon fibers from the carbon fiber reinforced plastic material using microwave energy to separate the carbon fibers from the polymer matrix.

Methods and equipment for the recycling of carpet are disclosed that produce a clean fiber product suitable for industrial use. The methods allow the recovery of face fiber material, for example a polyester, polyolefin, or a polyamide, from carpets that includes a face fiber material, a polypropylene backing material, and an adhesive, and include the steps of mechanically impacting the carpet to break the bonds between the adhesive and the fibrous components, treating the fibrous components to remove adhesive granules from the fibrous components, and optionally separating the polypropylene backing from the face fiber. A clean adhesive/calcium carbonate product can also be produced from this process.

The present disclosure provides methods and systems for manufacturing a composite component. User input indicative of component parameters for fabrication of the composite component are obtained, the component parameters including a prepreg offcut material parameter indicative of a prepreg offcut to be recycled. At least one staging parameter for a staging process of the prepreg offcut is determined based on the prepreg offcut material parameter. A compression moulding process map for the fabrication is determined based on the component parameters A manufacturing parameters for the fabrication is determined based on the compression moulding process map. At least one signal indicative of the staging parameters, the compression moulding process map, and the manufacturing parameters is issued.

The invention relates to an apparatus and a method for reducing the size of fiber composite materials, characterized in that means (6) for mechanically abrading an embedding matrix from fibers is provided, the mechanical abrasion of the embedding matrix from the fibers being performed using a rotational movement. In the method of the invention, an embedding matrix is mechanically abraded from the fibers by the means (6) using a rotational movement of the means (6) that are put in place.

A method of manufacturing a part, includes: obtaining recycled fibers; mixing the recycled fibers with a thermoplastic to obtain a fiber-reinforced intermediate; and manufacturing the part with the fiber-reinforced intermediate. The recycled fibers may come from a grinding operation of recycled composite parts. A feedstock may be manufactured using recycled fibers. The feedstock may then be used in subsequent manufacturing.