PET and PVC Separation with Hyperspectral Imagery

Moroni, Monica; Mei, Alessandro; Leonardi, Alessandra; Lupo, Emanuela; Marca, Floriana La

doi:10.3390/s150102205

Cited by 102 publications

(66 citation statements)

References 40 publications

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“…A fourth method employs the use of a water solution with chemical substances added, making possible the identification of PET and PVC by density differences. The disadvantage of this method is the aggressiveness on the material by chemicals [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

PET and PVC separation system based on optical sensors

et al. 2015

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In this work, we present experimental results of a cost-efficient photonic system capable to discriminate Polyvinyl Chloride (PVC) bottles from those made of Polyethylene Terephthalate (PET). The proposed array uses a semiconductor laser emitting at 810 nm, whose output is diverged employing a line lens in order to obtain a line light pattern. Given the lower attenuation coefficient of the PVC in comparison to PET at this wavelength, the received optical power is higher for the PVC than for the PET, which results in higher photogenerated current and, consequently, higher voltage after the transimpedance amplifier. Experiments considering several samples reveal an average voltage difference of 10% between materials, probing its feasibility for future industrial applications.

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Section: Introductionmentioning

confidence: 99%

PET and PVC separation system based on optical sensors

et al. 2015

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“…Polyethylene terephthalate presents great advantages, eg, keeping its chemical and physical properties, which makes PET the first choice among other plastics. In return, polyvinyl chloride (PVC) is a thermoplastic polymer mainly used to produce floors, coverings, window frames, cable insulation, etc, and can be found as part of plastic waste in recycling plants.…”

Section: Introductionmentioning

confidence: 99%

“…Because these chemical compounds are spectrally different, 1 possible solution is to use hyperspectral cameras (near‐infrared [NIR] hyperspectral cameras in this case). Hyperspectral imaging allows overcoming most of the problems linked to plastic separation, such as moisture, plastic densities, or additives in separation by flotation and density, among others …”

Section: Introductionmentioning

confidence: 99%

“…There is a vast amount of companies worldwide aimed at recycling PET by already using hyperspectral machinery with NIR and Raman images, together with multivariate models implemented. Many works have dealt with plastic classification by hyperspectral imaging, although only some of them have specially focused on with PET sorting and very few with its separation from PVC …”

Section: Introductionmentioning

confidence: 99%

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Comparison of latent variable‐based and artificial intelligence methods for impurity detection in PET recycling from NIR hyperspectral images

Galdón-Navarro

Prats-Montalbán

Cubero

et al. 2017

Journal of Chemometrics

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In polyethylene terephthalate's (PET)'s recycling processes, separation from polyvinyl chloride (PVC) is of prior relevance due to its toxicity, which degrades the final quality of recycled PET. Moreover, the potential presence of some polymers in mixed plastics (such as PVC in PET) is a key aspect for the use of recycled plastic in products such as medical equipment, toys, or food packaging. Many works have dealt with plastic classification by hyperspectral imaging, although only some of them have been directly focused on PET sorting and very few on its separation from PVC. These works use different classification models and preprocessing techniques and show their performance for the problem at hand. However, still, there is a lack of methodology to address the goal of comparing and finding the best model and preprocessing technique. Thus, this paper presents a design of experiments-based methodology for comparing and selecting, for the problem at hand, the best preprocessing technique, and the best latent variable-based and/or artificial intelligence classification method, when using NIR hyperspectral images.

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“…Однако, появление в последние годы гибких электронных изделий (экранов, светящихся панелей [2] ) и прозрачностью (88 -90 %) [3,4]. Сумма таких качеств делает его весьма подходящим для использования в качестве подложки.…”

Section: Introductionunclassified

Механизм взаимодействия тонких плёнок группы железа Fe, Co, Ni с подложкой из полиэтилентерефталата

Shapoval¹,

Kasumov²,

Lashkaryov³

2017

CSL

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Shapoval, K.O., Kasumov, A.M., Lashkaryov, G.V. (2017) Interaction mechanism between thin films of iron group Fe, Co, Ni and polyethyleneterephthalate as substrate, 4(37), doi: 10.26909/csl.4.2017.4 Significant progress in obtaining and investigating thin metallic films, achieved in the late XX century, led to the discovery of a whole series of new phenomena, the study of which remains relevant at the present time. Technology development made it possible to synthesize completely new multicomponent materials with properties. In this case, a number of unique physical phenomena arise, such as a spin-dependent scattering of conduction electrons, an indirect exchange coupling, surface magnetic anisotropy. Transformations of magnetic and magnetoresistive properties in layered structures in are largely due to the indirect exchange relationship that arises between the finer and oscillates with a change in the thickness of the nonmagnetic interlayer.PET (polyethylene terephthalate, better known as PET or lavsan) is a complex thermoplastic polyester of terephthalic acid and ethylene glycol. According to its physical properties, it is a solid. PET has good heat resistance in the temperature range from -40 °C to +200 °C. A small water absorption causes a high stability of properties and sizes of products. Products made of PET are resistant to shock and cracking, and can operate at temperatures up to + 70 °C. PET is resistant to dilute acids, oils, alcohols, mineral salts and most organic compounds, with the exception of strong alkalis and some solvents. PET minimally adsorbs odors and exhibits the properties of a good gas barrier.Interaction mechanisms of thin films ferromagnetic metals (Fe, Co, Ni) with a polyethyleneterephthalate (PET) as subsrate was study based on the analysis of IR absorption spectra.It is shown that between these films and the substrate, both chemical and magnetic interactions occur, leading to a shift and splitting of the IR absorption bands of the polymer. The chemical interaction of metal atoms occurs mainly with carbonyl C = O, carboxylic COOH, hydroxyl OH and C -O molecular groups of the polymer containing oxygen. The magnetic interaction of ferromagnetic metals (Fe, Co, Ni) arises from the diamagnetic properties of PET molecular groups.

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PET and PVC Separation with Hyperspectral Imagery

Cited by 102 publications

References 40 publications

PET and PVC separation system based on optical sensors

PET and PVC separation system based on optical sensors

Comparison of latent variable‐based and artificial intelligence methods for impurity detection in PET recycling from NIR hyperspectral images

Механизм взаимодействия тонких плёнок группы железа Fe, Co, Ni с подложкой из полиэтилентерефталата

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