A method of recovering polyolefin polymer from a three-dimensional printed object can include dissolving a polyolefin polymer of a three-dimensional printed object in a polyolefin-dissolving solvent to generate dissolved polyolefin polymer from the three-dimensional object, wherein the three-dimensional printed object includes from about 0.1 wt % to about 10 wt% particulate fusing compound and from about 90 wt% to about 99.9 wt% polyolefin polymer. The method can further include separating the particulate fusing compound from the polyolefin-dissolving solvent and the dissolved polyolefin polymer, and evaporating the polyolefin-dissolving solvent from the dissolved polyolefin polymer.

A waste polyester material is prepared for recycling by dissolving the material in a solution comprising hexafluoroisopropyl (HFIPA) and a chlorinated hydrocarbon, such as dichloromethane (DCM) and/or an aromatic hydrocarbon, such as toluene or xylene, to form a dissolved polyester sample. The dissolved polyester may be prepared for recycling by evaporation, spray drying, and/or precipitation, which produces a purified solid polyester product. The dissolution solution, which is separated from the purified solid polyester product, is also recycled through distillation with purification.

Disclosed is a process for treating plastic waste chips containing a blend of polypropylene and polyethylene in an amount of at least 83.0 wt.-% to less than 100 wt.-% and further containing C7 to C11 aldehydes in an amount of 8000 ppb to 20000 ppb and limonene in an amount of 5 ppm to 500 ppm, the process comprising subjecting said plastic waste chips, in a fixed bed without stirring under standard pressure or reduced pressure, to a gas flow for achieving a Reynolds number in the range of 35 to 1200 at a temperature in the range of 20° C. to a point 10° C. below the Vicat softening point (10N, ISO 306) of said plastic waste and recovering the treated plastic waste chips containing C7 to C11 aldehydes in a total amount of 50 ppb to less than 5000 ppb limonene in an amount of 0.5 to 5 ppm.

In general, this disclosure relates to an apparatus that compresses lightweight plastic waste (e.g., used grocery bags, empty trash bags, food wrappers, etc.), and then applies a limited amount of heat to “bake” the compressed plastic into a “brick” of plastic. The plastic is compressed, and then heated enough to cause it to retain its compressed shape, without melting or substantial outgassing.

The embodiments relate to a polyester film, to a process for preparing the same, and to a process for regenerating a polyethylene terephthalate (PET) container using the same. The polyester film has excellent seaming characteristics and recyclability by virtue of controlled crystallinity, whereby clumping rarely occurs even if it is thermally treated for a long period of time in the regeneration process.

A system comprising: (1) a grinding unit configured to receive and grind recycled PET bottles into a group of polymer flakes comprising up to about ten percent colored polymer flakes and balance substantially clear polymer flakes; (2) a washing unit configured to wash the group of polymer flakes; and (3) an extruder configured to extrude material in a plurality of different extrusion streams. The extruder may be further configured to: (1) receive a concentrate-polymer mixture comprising a mixture of the polymer flakes and a color concentrate; (2) melt the concentrate-polymer mixture to produce a polymer melt; (3) reduce a pressure within the extruder; and (4) pass the polymer melt through the extruder so that the polymer melt is divided into the plurality of extrusion streams. The system may then filter the polymer melt through at least one filter and form the polymer melt into bulked continuous carpet filament.

The invention relates to a device for preparing composite material waste, in particular carbon fiber-reinforced waste, comprising a comminuting assembly (2) for the composite material waste, a downstream temperature control zone (3) for controlling the temperature of the comminuted composite material waste, and a forming unit (4) for producing composite material waste compacts. In order to provide companies without recycling facilities, regardless of the type of composite material waste, with a low-cost and environmentally friendly alternative to dumping harmful composite material waste in landfills, it is proposed that the comminuting assembly (2), the temperature control zone (3) and the forming unit (4) are arranged in an at least substantially hermetically sealed and transportable working chamber (1).

A cellulose-fiber dispersion polyethylene resin composite material, formed by dispersing a cellulose fiber into a polyethylene resin, wherein a proportion of the cellulose fiber is 1 part by mass or more and 70 parts by mass or less in a total content of 100 parts by mass of the polyethylene resin and the cellulose fiber, and wherein water absorption ratio satisfies the following formula; and a formed body and a pellet using the same, a production method therefor, and a recycling method for a cellulose-fiber adhesion polyethylene thin film piece.
(water absorption ratio)<(cellulose effective mass ratio).sup.2×0.01  [Formula].

Powder compositions containing processed solid waste are provided herein, as are products made from the compositions, and systems and methods for making the compositions and products.

A single layer solar rotational molded article prepared from a blend of (a) from 1 wt % to 99 wt % based on the weight of the blend, of at least one of a first composition and a second composition, each comprising a melt flow index of from 0.05 g/10 mins. to 20 g/10 mins. and (b) from 1 wt % to 99 wt % based on the weight of the blend, of a third composition comprising a melt index of 0.05 g/10 mins. to 20.0 g/10 mins. In an exemplary embodiment, the first composition is a powder resin, the second composition is a binder resin, and the third composition is a recycled material in the form of polyolefin containing waste. The blend can include an additive such as, for example, pigments and colorants, UV stabilizers, antioxidants, anti-static agents, flame retardants, textured material, the like, or any combination thereof.