美国麻省理工学院的工程师团队研发出一种新型热塑性纱线，为纺织品回收提供了新的解决方案。1这种纱线由两种聚乙烯变体制成，来自同一化学族系，既具备弹性纤维的性能，又能直接熔融进行回收。1相比之下，传统弹性纱线的回收需要分离纤维，这在实际操作中往往不切实际。1
该项目由MIT机械工程系研究科学家Svetlana Boriskina参与。1测试表明，用这种材料制成的服装经过10个熔融和纺纱循环后，强度和柔韧性保持不变。1这一创新具有重要意义——美国平均每年每人丢弃约81磅衣物。1通过开发可直接回收的纺织品材料，该技术有望推动形成更为可持续的纺织循环经济。
Engineers at MIT have created a novel thermoplastic yarn designed to address textile waste by enabling repeated melting and reprocessing without losing performance. The material is made from two polyethylene variants belonging to the same chemical family, combining the elasticity of conventional stretch fibers with direct meltability for practical recycling.1
Current elasticized fabrics present a significant recycling challenge because their composite fiber structures require complex separation processes that render recovery economically unfeasible. The MIT team's approach circumvents this problem by engineering a single material system capable of functioning as both elastic fibers and recyclable feedstock. After ten consecutive cycles of melting and respinning, the yarn retained its original strength and flexibility without degradation.1
The innovation addresses a pressing sustainability concern in the fashion industry. Americans alone discard approximately 81 pounds of clothing per person annually, a volume that conventional recycling infrastructure struggles to accommodate.1 According to Svetlana Boriskina, a research scientist on the project from MIT's Department of Mechanical Engineering, this recyclable yarn technology could establish a more sustainable circular economy for textiles.1
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