The invention provides a deinking method including a step of peeling off and removing, from a plastic substrate having an ink layer, the ink layer by using a deinking agent that contains (a) 20 mass % or more of a water-soluble solvent and (b) 0.1 mass % to 10 mass % of an inorganic base. According to the invention, it is possible to provide a deinking method that can easily peel off an ink layer printed on a plastic substrate, a deinking agent that can be used in the deinking method, and a plastic substrate recovery method using the same.

Provided is a separation and recovery apparatus for continuously separating and recovering, from a resin mixture containing a resin containing a hydrolyzable polymer and a resin containing a nonhydrolyzable polymer, a hydrolytic component a of the hydrolyzable polymer A and the nonhydrolyzable polymer B, the apparatus including: a crushing unit that crushes the resin mixture a melting/discharging unit that melts a crushed product obtained by the crushing unit to form a fluid and discharges the fluid at a high pressure; and a hydrothermal reaction treatment unit that continuously subjects the fluid discharged from the melting/discharging unit to a hydrothermal reaction treatment, wherein, in the melting/discharging unit, the hydrolyzable polymer A is hydrolyzed, and the hydrolytic component a thereof is dissolved and transferred into water permeating a sintered alloy diaphragm, thereby separating the nonhydrolyzable polymer B.

The present invention relates to a process for recycling waste high density polyethylene (HDPE) materials, which is carried out by thermofusion. Through this recycling process, products having particular qualities are obtained, and laminated products or products in the form of a molded block may be obtained. Said products, in addition to representing a benefit for the environment, exhibit particularities that make them different from virgin raw material products and recycled products, representing a surprising and unexpected technical advantage over those currently available.

A separation device includes a first shredding unit, a first separation unit, a second shredding unit, and a second separation unit. The first shredding unit shreds a processing target containing a first material and a second material. The first separation unit rotates a first tubular portion in a state in which the processing target shredded by the first shredding unit is accommodated therein, thereby separating the second material passing through first holes from the processing target. The second shredding unit shreds the processing target from which the second material passing through the first holes is separated by the first separation unit. The second separation unit rotates a second tubular portion in a state in which the processing target shredded by the second shredding unit is accommodated therein, thereby separating the second material passing through second holes from the processing target.

Provided is a method of recycling an additively manufactured object into a reusable thermoplastic polymer, which method in some embodiments may include: (a) providing at least one additively manufactured object produced by stereolithography from a dual cure resin, the object comprising (i) a light polymerized polymer, and (ii) a heat polymerized polymer intermixed with said light polymerized polymer; (b) comminuting the object to produce a particulate material therefrom; (c) contacting the particulate material to a polar, aprotic solvent for a time and at a temperature sufficient to extract the heat polymerized polymer from the particulate material into said solvent, leaving residual particulate material comprising said light polymerized polymer in solid form; (d) separating the residual particulate material from said solvent; and then (e) separating the heat polymerized polymer from said solvent to provide a reusable thermoplastic polymer material in solid form.

The method of recycling carbon fiber prepreg waste includes collecting uncured carbon fiber prepreg waste, where the carbon fiber prepreg waste still includes the backing film associated with the carbon fiber prepreg (typically in the form of a colored polyethylene layer). The uncured carbon fiber prepreg waste is then shredded and inserted into either an open or a closed mold. The mold is then inserted into a hot press, where the shredded carbon fiber prepreg waste is cured under selected temperature and pressure for a selected period of time, dependent upon the particular volume of waste and the desired recycled product. Alternatively, the shredded carbon fiber prepreg waste may be rolled in a hot metallic roller or extruded in a hot melt extruder.

Methods and apparatus are provided for the separation of a feedstock stream comprising a principle component and at least one secondary component such that at least one component has greater friability that the others using a rotary impact separator. The methods allow the recovery of two or more streams, one rich in the more friable component, and one lean in the more friable component.

The present invention generally relates to a process for separating polyolefin fractions from solid polymer material mixtures by molar mass fractionation. The present invention also relates to polyolefin fractions obtained by the process and the use of these fractions in the manufacture of an article.

Embodiments relate to a polyester film, preparation method thereof and method for reproducing polyethyleneterephthalate (PET) container using same, the crystallization temperature (Tc) of the polyester film is not measured or is 70? C. to 130? C., as measured by differential scanning calorimetry, whereby it is possible to easily control the crystallinity. Accordingly, the polyester film has excellent shrinkage characteristics and recyclability, and clumping rarely occurs even if it is dried at high temperatures for a long period of time in the regeneration process.

Aspects of the present disclosure relate to methods, systems, and apparatus for efficiently reducing carbon footprints in refining systems and petrochemical processing systems. In one aspect, a plastic powder feedstock is blended into a feedstock of a processing system to re-use plastic and reduce carbon footprints. In one implementation, a method of blending plastics into a processing system includes pulverizing a plastic supply to a plastic stock having a granule size that is within a range of 7 nanometers to 10 nanometers. The method includes separating the plastic stock to remove a portion having a granule size that is outside of the range of 7 nanometers to 10 nanometers and generate a plastic feedstock. The method includes blending the plastic feedstock into a feedstock of the processing system to generate a blended feedstock, and processing the blended feedstock.