The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, comprising a) depositing successive layers of a powdered material (M), at least partially recycled, comprising at least one poly(ether ketone ketone) (PEKK), having a phosphorus content of more than 30 ppm, as measured by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), and b) selectively sintering each layer prior to deposition of the subsequent layer.

A process for preparing a composite part, the process comprising: recovering unsaturated resin prepreg scrap; combining the recovered unsaturated resin prepreg scrap with a second resinous thermosetting component; and co-molding the prepreg scrap and resinous thermosetting component together under a pressure of 25 to 4000 psi and at a temperature of 100-400 F.

Methods and systems are provided for forming a molded foam article. An example method may include molding a plurality of separate pieces of closed-cell foam by exposure to a temperature cycle within a sealed mold to soften the plurality of pieces sufficiently for physical bonding; and forming a molded foam article with the pieces bonded together without an adhesive, wherein, during the temperature cycle, the mold is unsealed at least once to release gases and/or pressure. In another example, a method includes exposing a filled, sealed mold filled with a plurality of pieces of foamed material to a heating cycle; at a threshold temperature, unsealing the filled, sealed mold until a pressure reduces to within a threshold of atmospheric pressure; and, following the unsealing, cooling the filled mold prior to removing a molded foam article.

Solid-state additive manufacturing methods for compounding conductive plastic compositions, fabrication of conductive plastic parts and conductive coatings, and plastic recycling are disclosed. Electrically conductive or thermally conductive plastic compositions are compounded and subsequently printed with the solid-state additive manufacturing system. The solid-state fabricated compositions, parts and coatings can also be manufactured to be both thermally and electrically conductive. Solid-state plastic waste recycling methods are also disclosed where various plastic waste materials and shapes are solid-state processed. The plastic waste can be mixed with virgin plastic material or mixed with other types of materials such as metals, ceramics or their combination. The waste plastic feedstock is reinforced with different types of reinforcing particles or fibers, or various additives are added for improving properties of the final deposits.

The manufacturing method comprises at least one processing step for a carbon-carbon composite part (100, 200). In a first variant, the method comprises steps for machining and a step for processing the part. In a second variant, the method comprises a crushing step for the part before the processing step and a moulding step after the processing step. Application to manufacturing timepiece components (170, 270).

A method may include pressing a mat including a blend of paper and plastic fragments by applying a pressure to the mat using a heated press such that the mat is compressed to a first thickness, where the pressure is greater than a critical pressure threshold such that at least a portion of a moisture content of the mat is in a super-heated liquid state. The method may include maintaining the pressure on the mat above the critical pressure threshold until at least a portion of the plastic fragments of the mat are melted. The method may include decreasing the pressure on the mat below the critical pressure threshold such that the mat expands to a second thickness greater than or equal to a target thickness, and such that the portion of the moisture content of the mat in the super-heated liquid state is converted to steam.

A barrier includes recycled rubber portions molded around a core infrastructure. The core infrastructure may itself include recycled rubber in a containment body. The containment body may include baled recycled or other waste material. The barriers may be stacked or connected to form a barrier structure useful in environmental control and other applications. The method for making the barriers includes molding rubber portions and a binder around a core infrastructure.

A polymer composition including: a. 75-90 wt % of a recycled polypropylene; b. 1-20 wt % of a polyolefin elastomer (POE); c. 0-10 wt % of a styrene ethylene butylene styrene block copolymer (SEBS); d. 2-20 wt % of talcum; wherein the amount of POE and SEBS is at least 3.5 wt %, preferably between 5 and 20 wt %, and wherein the wt % is relative to the total weight of the polymer composition.

The invention relates to a method and system for the elimination of odours in recycled plastic materials, which comprises the steps of: separating and conditioning the plastic; shredding the plastic by means of a bladed shredded, which reduces the plastic into powder-sized particles; chemically washing with a surfactant, which is carried out in a stirring tank; rinsing the plastic material to eliminate dirt and the chemicals used, which is carried out in a rinsing reactor; mechanically drying the clean material in a dryer; and deodorising the plastic, wherein volatile organic compounds (VOCs) are removed from the clean, dry material by means of steam distillation, deodorisation being performed in a steam distillation column, the VOC-free plastic exiting through the bottom part of the column.

An architectural resin panel that incorporates plastic granules fused together to form a panel core. A portion of the plastic granules are contaminant granules that at least partially include a contaminant material, such as a piece of fabric, plastic film, or plant material. The granules used to form the panel core may be sourced from waste plastic material that would otherwise be required to undergo waste processing.