Biopolymers in the Existing Postconsumer Plastics Recycling Stream
Biopolymers in the Existing Postconsumer Plastics Recycling Stream
复制标题
现有消费后塑料回收流中的生物聚合物
DOI：
10.1007/s10924-007-0077-0
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发表时间：
2007
影响因子：
5.3
通讯作者：
D. D. Cornell
中科院分区：
文献类型：
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作者：
D. D. Cornell
现有的塑料瓶回收行业有可行的技术，满意的客户，原料和投资者。在现有的材料组合中添加新材料需要满足这些材料的所有四种需求。硬质塑料容器回收的重点是高密度聚乙烯（HDPE）和聚对苯二甲酸乙二醇酯（PET）瓶，在北美销售的瓶子中占压倒性的比例。其他树脂瓶，包括聚氯乙烯（PVC），聚丙烯和生物聚合物，缺乏独立回收所需的临界质量。要进行机械回收，生物聚合物必须与现有的回收树脂完全互换，或者有足够的数量以达到所需的临界质量。到目前为止，生物聚合物的产量预测并不令人鼓舞。生物聚合物，像所有的小瓶树脂，必须支付自己的方式在分类和处理没有补贴的PET和HDPE回收。根据有限的数据，一些生物聚合物可能对回收的HDPE性能几乎没有影响，但在一定程度上会造成产量损失和经济负担增加。生物聚合物尚未显示出与PET相容，并且即使在发生率较低的情况下，也可能表现出性能问题和经济负担。应仔细选择生物聚合物的应用，以免干扰目前的回收材料，除非能够迅速达到临界质量。
The existing plastic bottle reclaiming industry has working technology, satisfied customers, raw material, and investors. Adding new materials to the current mix requires satisfying all four needs for those materials. Rigid plastic container recycling focuses on high-density polyethylene (HDPE) and polyethylene terephthalate (PET) bottles, the overwhelming percentage of bottles sold in North America. Bottles of other resins, including polyvinyl chloride (PVC), polypropylene and biopolymers, lack critical mass necessary for independent reclamation. To be mechanically recycled, biopolymers must be either completely fungible with existing recycled resins or be available in sufficient quantity to achieve the needed critical mass. So far, biopolymer volume projections are not encouraging. Biopolymers, like all minor bottle resins, must pay their own way in sorting and processing without subsidy from PET and HDPE recycling. Based on limited data, some biopolymers may have little effect on recycled HDPE performance, but will represent a yields loss and added economic burden at some level of occurrence. Biopolymers have not been shown to be compatible with PET and likely will represent performance problems and economic burdens at even low levels of occurrence. Applications for biopolymers should be carefully selected so as to not interfere with currently recycled materials unless critical mass can be achieved quickly.