造紙廢棄物可替代PP注塑或擠出塑料制品

紙業廢棄物可注塑或擠出塑料制品,減少聚丙烯使用量。

盡管紙張和紙板生產過程產生的廢棄物有時能使用在混凝土中,但是大多數造紙廢物最終被倒入垃圾填埋場。然而芬蘭國家技術研究中心(VTT)的研究人員已經發現其可以被當作塑料制品的原料,實驗室測試,表明造紙廢棄物可以取代注塑或擠出塑料復合材料中50%的聚丙烯。通過調整造紙廢棄物與聚丙烯的比例,可以調整塑料的強度、剛度、耐熱性、外觀和表面紋理等特性。到目前為止已經創造了塑料地磚和儲存容器,它們由30%的造紙廢物組成,如下圖所示:

環保塑料

上述對廢棄物的再利用,不僅可以避免大量造紙廢物被倒入垃圾填埋場,還能降低塑料制品的生產成本,減少所需聚丙烯的用量。研究人員表示,造紙廢物也有望被用于制作板條箱和托盤等物品。

詳情介紹見這里:

VTT Technical Research Centre of Finland examined, as part of the EU’s Reffibre project, whether new industrial applications could be developed for various types of sludge and fly ash generated by the paper and board industry.? Laboratory tests showed that these side streams can replace up to 50% of oil-based polypropylene. They can be used as a raw material in plastic composites made using injection moulding and extrusion.

Large quantities of various side streams are created during the manufacture of paper and cardboard. Part of these can be used instead of natural aggregates as a raw material in concrete or asphalt, or in construction. Large amounts of side streams still end up in landfills and incineration.

Side streams could be used to lower composite manufacturing costs, reduce the environmental impacts of production, and lower the total amount of waste. This would also reduce the production of oil-based plastics.

Laboratory tests showed that 50% of the raw-materials in injection-moulded composite could come from paper and board industry side streams. The amount of side streams has an effect on the product’s properties: strength, stiffness, heat resistance, appearance and the texture of the surface.

During the project, Plastec Finland Oy and Wiitta Oy produced floor tiles and storage containers, of which side-streams accounted for 30%. New applications are continually being sought – in the future, they may include pallets and crates, for example.

The possible legal restrictions still have to be explored prior to the product-specific use of side-streams in composites.

VTT coordinated the Reffibre project (No. 604187), which formed part of the EU’s Seventh Framework Programme, during 2013-2016. In addition to VTT, Technische Universit?t Darmstadt, Papiertechnische Stiftung, Instituto Tecnológico del Embalaje, Transporte y Logstica, Bumaga BV, Confederation des Industries Papetieres Europeennes CEPI Aisbl, Vrancart S.A. Adjud, Alucha SL, Papierfabrik Utzenstorf AG and Holmen AB participated in the project. The side streams used for the study were obtained from European companies.

資料來源:vttresearch,僅供參考。

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