《科学委员会/科学小组的意见: PET的回收处理》

  • 来源专题:食物与营养
  • 编译者: xinning
  • 发布时间:2015-07-28
  • This scientific opinion of the EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids deals with the safety evaluation of the recycling process ExtruPET (EU register number RECYC0124), which is based on the Starlinger IV+® technology. The input of the process is hot caustic washed and dried poly(ethylene terephthalate) (PET) flakes originating from collected post-consumer PET containers, containing no more than 5 % of PET from non-food consumer applications. In this technology, washed PET flakes are dried and crystallised in a reactor, then extruded into pellets which are further crystallised in a second reactor. Crystallised pellets are then pre-heated in a third reactor and fed to the solid state polycondensation (SSP) reactor. Having examined the challenge test provided, the Panel concluded that the three steps, drying and crystallisation, extrusion and crystallisation and SSP are the critical steps that determine the decontamination efficiency of the process.

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  • 《科学委员会/科学小组的意见: PET的回收处理》

    • 来源专题:食物与营养
    • 编译者:xinning
    • 发布时间:2015-07-28
    • This scientific opinion of the EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids deals with the safety evaluation of the recycling process Coveris (EU register No RECYC0126), which is based on the same Starlinger Decon technology. The decontamination efficiency of the process was demonstrated using the same challenge test. The input of this process is washed and dried poly(ethylene terephthalate) (PET) flakes originating from collected post-consumer PET containers, mainly bottles, containing no more than 5 % of PET from non-food consumer applications. In this technology washed and dried PET flakes are pre-heated before being Solid State Polycondensed in a continuous reactor (SSP) at high temperature under vacuum and gas flow. Having examined the challenge test provided, the Panel concluded that the pre-heating (step 2) and the decontamination in the continuous SSP reactor (step 3) are the critical steps that determine the decontamination efficiency of the process. The operating parameters that control their performance are well defined and are temperature, pressure, residence time and gas flow for step 2 and 3.
  • 《科学委员会/科学小组的意见: 玻璃光纤施胶剂》

    • 来源专题:食物与营养
    • 编译者:xinning
    • 发布时间:2015-07-28
    • Following a request from the European Commission, EFSA was asked to review Commission proposals for classification of the substances used as sizing agents and provide an opinion on whether or not the proposed classifications could imply an unacceptable risk to human health. Glass fibre-reinforced plastics are composite materials made of a polymer matrix reinforced with glass fibres. The glass fibres therein are coated with a surface treatment (‘sizing agent’) to hold individual filaments together and to promote adherence to the polymer matrix. Glass fibre-reinforced plastic is covered by Regulation (EU) No 10/2011, which stipulates that substances used for its manufacture should be listed in the Union List. From January 2016, the Plastics Regulation will also apply to glass fibre-sizing agents, and these substances shall be included in the Union List. On the basis of the low migration from glass fibre-reinforced plastics and the low consumer exposure expected, the CEF Panel does not expect any particular health risks from sizing agents compared with other plastics. For substances classed as coupling agents and for the substances considered polymer production aids, aids to polymerisation or solvents used to make plastics, any use of glass fibre-reinforced plastics does not seem to merit deviation from risk management decisions that were taken earlier.