Provided herein are methods of recycling additively manufactured objects (e.g., stereolithographically produced objects), the additively manufactured objects comprising linear polyurethane, branched polyurethane, linear polyurea, branched polyurea, a copolymer thereof, or a combination thereof. Compositions comprising the same and methods of use thereof are also provided.

The present disclosure provides a composite material for use in reducing carbon emission. the composite material comprising (i) at least 40 wt % of heterogenous organic matter out of a total weight of the composite material, said heterogenous organic matter comprising at least cellulose (ii) a plurality of synthetic polymers and (iii) up to 15 wt % inorganic matter; wherein said composite material comprises less than 5 wt % polyethylene terephthalate PET out of the total weight of the composite material: and wherein said composite has a carbon footprint of below about-10Kg CO.sub.2 eq/Kg as determined according to ISO 14040:2006. Also disclosed is an article of manufacture comprising the composite material. method of producing the article of manufacture.

A cryogenic grinding apparatus is provided. The apparatus includes a material charge, a low-temperature embrittling device for embrittling the charged ground material by supplying liquid low-temperature gas, a mill for grinding the low-temperature embrittled ground material in an atmosphere containing the low-temperature gas, and a separating device. The separating device has a wind classifier, a removal device to remove the ground material from the mill-output volumetric flow, and a directing device to feed the removed ground material into a classifier-input volumetric flow and to discharge excess mill-output gas of the mill-output volumetric flow. In addition, a cryogenic grinding process is provided in which the ground material is removed from the volumetric flow, excess grinding gas is discharged, removed ground material is feed into a classifier-input volumetric flow of a wind classifier and a classifier-input volumetric flow is classified for separating off a classifier-output volumetric flow containing the fine material.

A method for manufacturing micronized rubber powders including grinding of a rubber granulated feedstock, size classification and storage of the micronized rubber powders thus obtained. A rubber formulation including at least one natural or synthetic rubber, a micronized rubber composition and optionally one or more of processing aids, antidegradants, fillers, accelerators and curatives. A method for manufacturing a rubber product, as well as to a solid rubber product.

The invention relates to a method and a system for the processing of an end-of-use pneumatic tire that is provided with an inner lining layer manufactured with a sealing agent intended to seal any punctures and at least partially applied to the surface of an inner cavity of the end-of-use pneumatic tire. The system comprises an applicator device, which is provided with at least one nozzle suitable for dispensing a cryogenic fluid, preferably liquid nitrogen, upon the inner lining layer of sealing agent in such a way that the inner lining layer of sealing agent reaches the solid state; a device for the removal of the inner lining layer of solid sealing agent that is provided with a tool for removing the inner lining layer of solid sealing agent by means of mechanical abrasion; and a circuit for suctioning the solid sealing agent removed by the tool.

An extruded polystyrene processing device for processing extruded polystyrene includes a processing plant which includes a chopping unit for chopping extruded polystyrene into chopped pieces. The chopping unit is connected to a solvent bath unit for submerging the chopped pieces in a solvent for eliminating air bubbles in the chopped pieces. The solvent bath unit is connected to a conveyor unit for rinsing the chopped pieces and the conveyor unit is connected to a freezing unit to subsequently freeze the chopped pieces. The freezing unit is connected to a grinding unit for grinding the frozen chopped pieces into a granular material for subsequent collection and transportation to a waste management facility. In this way the processing plant reduces the total volume of the extruded polystyrene prior to being handled by the waste management facility.