In order to prevent the pollution to the environment due to the conventional sizing processes and improve the sizing performance, an efficient and environmental friendly sizing process is in need. In this research, a size-free sizing process for cellulose yarns was developed based on the low temperature cellulose dissolution mechanism. The fiber surfaces in yarns was partially dissolved or swelled and then formed thin films to reinforce yarns and attach hairiness to the yarn body. Compared with the conventional sizing process, the size-free sizing process could not only enhance the strength and abrasion resistance of yarns, but also better maintain the elasticity of yarns, substantially reduce the amount of harmful hairiness and improve the dyeability of yarns. Since the size films was thin, yarns was still soft, and the desizing process can be omitted. The developed size-free sizing process, low in cost, energy consumption and carbon emission, has the potential to be employed in large scale industrial production.%为改进传统浆纱工艺对环境带来的污染，并提升上浆性能，需要开发新型浆纱工艺，为此，基于纤维素低温溶解体系，建立了无需使用浆料的纤维素基纱线的浆纱方法，利用部分溶解或溶胀纱线中纤维表面成分，形成较为均匀且较薄的浆膜，以实现纱线的增强与毛羽的贴伏。与传统上浆处理的对比研究结果显示，经过无浆料浆纱工艺处理的纱线拥有与传统工艺处理后相当的强度、耐磨性，还具有更优的保伸性，可永久大量减少有害毛羽数量，提升纱线染色性能，且浆纱后纱线柔软，无需进行退浆处理。该工艺生产成本低，能耗小，低碳环保，具有工业化的潜力。
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