摘要:
Apparatus and methods for identifying substances in a material include at least one light source configured to irradiate a sample of the material with light of at least one wavelength. A detector is configured to detect light re-emitted or transmitted by the sample. An analysis device analyzes the detected light by UV/VIS spectroscopy, fluorescence spectroscopy, Raman spectroscopy, or absorption spectroscopy, and generates a first identification result for at least one substance of the sample. Further, the analysis device generates a second identification result in response to the first identification result being an ambiguous identification result. The second identification result may be generated by fluorescence light decay time analysis (FLZA). At least one substance is at least partially identified based on the first identification result or based on the first and second identification results.
摘要:
A method for sorting flexible polyurethane foams including: a) providing two or more calibration samples of conventional flexible polyurethane foams, two or more calibration samples of high resilience (HR) flexible polyurethane foams, and two or more calibration samples of viscoelastic flexible polyurethane foams, and obtaining a mid-infrared (MIR) spectrum of each calibration sample; b) carrying out a spectral pre-processing of the spectra of all the calibration samples and, then a first PCA to define a first library; c) carrying out a spectral pre-processing of the infrared spectra of conventional and HR calibration samples and, then a second PCA to define a second library; d) obtaining the MIR spectrum of a sample of polyurethane foam and, based on the first and second libraries, classifying the sample of polyurethane foam as a conventional, HR or viscoelastic polyurethane foam, or as a foam that is neither a conventional, a HR or a viscoelastic polyurethane foam.
摘要:
A method for recycling packaging wastes, referred to as first articles, made of PET or polyolefins (PO), that can be decolored in accordance with the “key-locker” principle, and second articles made of PET or PO, comprising the steps: (a) pre-sorting the first and second articles, (b) pre-washing the articles, (c) comminuting the articles to form flakes, (d) washing the articles, (e) dewatering and drying the flakes, (f) flake sorting, (g) extrusion, (h) solid-state polycondensation (SSP) in the case of PET wastes, or (i) decontamination in the case of PO wastes. The first articles are separated from the second articles by optical sorting and are decolored separate from the second articles in a decoloring step (j) by a reagent referred to as a “key.” The first decolored articles are temporarily stored (m) after step (j). After being stored, the first articles are fed to separate steps (g) and (h) or (i).
摘要:
A plastic item, such as a beverage bottle, conveys two distinct digital watermarks, encoded using two distinct signaling protocols. A first, printed label watermark conveys a retailing payload, including a Global Trade Item Number (GTIN) used by a point-of-sale scanner in a retail store to identify and price the item when presented for checkout. A second, plastic texture watermark conveys a recycling payload, including data identifying the composition of the plastic. The use of two different signaling protocols assures that a point-of-sale scanner will not spend its limited time and computational resources working to decode the recycling watermark, which lacks the data needed for retail checkout. In some embodiments, a recycling apparatus makes advantageous use of both types of watermarks to identify the plastic composition of the item (e.g., relating GTIN to plastic type using an associated database), thereby increasing the fraction of items that are correctly identified for sorting and recycling. A great number of other features and arrangements are also detailed.
摘要:
Presented and described is a method for reclaiming thermoplastic materials intended for recycling, such as, for example, polyethylene terephthalate (PET), in the form of flakes. According to the invention, in a first step, the flakes are exposed to an oxidative fluid and heat until contaminated flakes are modified such that, in a second step, they are separated from the remaining flakes as a result of this modification.
摘要:
An electronic device is for identifying the plastic composition of an unknown plastic object. The electronic device may include a spectrometer configured to receive the unknown plastic object and generate a MIR reflectance spectra characteristic of the unknown plastic object, a memory configured to store a multi-spectral fingerprint library for plastic types, and a processor coupled to the spectrometer and the memory. The processor is configured to analyze in real-time the MIR reflectance spectra characteristic of the unknown plastic object, and identify the plastic composition based upon at least comparing the MIR reflectance spectra characteristic of the unknown plastic object to the multi-spectral fingerprint library. The processor may be configured to expand the fingerprint library upon initial baseline characterization.
摘要:
A process for the recovery of a plastic product from ASR or ESR mixtures can include five or more process steps selected from DEXRT; XRF; size reduction; density separation; NIR sorting; Electrostatic separation; LD sorting; Wood removal; rubber removal; metal removal; and glass removal.
摘要:
A method of manufacturing bulked continuous carpet filament which, in various embodiments, comprises: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) passing the flakes through a PET crystallizer; (E) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 18 millibars; (F) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (G) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.
摘要:
In a method and equipment for conditioning a heavy fraction high in plastics, which is obtained by conditioning low-metal scrap high in plastics, which originate at least in part from shredder processes of scrap vehicles, the method includes: isolating metal parts from the heavy fraction high in plastics; reducing the size of the metal-reduced heavy fraction high in plastics that remains after the isolation of the metal parts; splitting up of the metal-reduced heavy fraction high in plastics, that remains after the isolation of the metal parts, into fractions high in plastics having different grain sizes; conditioning the separated fractions high in plastics at least partially in separate processes. The equipment includes appropriate devices for carrying out the foregoing processes. A highly pure granulate fraction may be obtained, which may be fed to material utilization.
摘要:
A process for purifying plastic from a waste stream can include separating a waste stream into two or more mixtures of flakes with each mixture containing one or more plastic types and performing an automated sorting process on the first mixture to increase the weight percentage of a plastic family in the first mixture. The separation process can include at least one process selected from the group consisting of density separation, electrostatic sorting, froth flotation, and density differential alteration. Prior to the automated sorting process, the first mixture can include at least 80% by weight of one or more plastics from the plastic family.