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| 基于灰色关联分析法探究再生纤维对再生纸张机械性能的影响 |
| Analysis of the Influence of Recycled Fibers on the Mechanical Properties of Recycled Paper Based on Grey Relational Analysis |
| 收稿日期：2024-12-04 |
| DOI：10.11980/j.issn.0254-508X.2025.05.011 |
| 关键词: 再生纤维 再生纸张 机械强度 灰关联分析 |
| Key Words:recycled fibers recycled paper mechanical strength grey relational analysis |
| 基金项目:国家重点研发计划项目（2022YFF0607201）；广东省自然科学基金项目（2023A1515011422）。 |
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| 摘要:本研究对美废12#和美废13#进行3次回用，探究再生纤维性能和再生纸张机械强度的变化及二者间的关联度。结果表明，美废12#再生纤维较美废13#更粗更长，细小纤维含量更高，损伤更深；经3次回用后，美废12#与13#再生纤维的纤维长度加权长分别下降了10.8%和15.7%，分丝帚化长度比分别增加了11.2%和2.3%，纤维扭结和弯曲减少，折断增加；美废13#再生纤维的细小纤维含量减少，美废12#先增后减。3次回用后，美废12#和美废13# 2种再生纸张的抗张指数和耐破指数均下降（美废12#分别下降21.4%和10.2%，美废13#下降10.7%和2.6%），耐折度分别增加了25.6%和3.2%，撕裂指数则呈美废12#上升而美废13#下降的状态。综合比较显示，美废12#再生纸张机械强度普遍优于美废13#。通过灰色关联分析系统量化发现，再生纤维的短纤维占比、细小纤维含量和扭结纤维占比三者主要影响纤维间的结合，从而影响纸张的机械强度。 |
| Abstract:This paper conducted three recycling processes for US old corrugated container （OCC） 12# and 13# to investigate the variations in the properties of recycled fibers and the mechanical strength of recycled paper as well as the correlation between them. The results showed that US OCC 12# recycled fibers were thicker and longer than US OCC 13#， with higher proportion of fine fibers， and more extensive damage. After three recycling cycles， the fiber length-weighted average of US OCC 12# and US OCC 13# recycled fibers decreased by 10.8% and 15.7%， respectively， while their splitting length ratio increased by 11.2% and 2.3%， respectively. Fiber twisting and bending decreased， whereas fiber breakage increased. The fine fibers content of US OCC 13# recycled fibers progressively decreased， while that of US OCC 12# recycled fibers initially increased and then declined. Following three recycling processes， both recycled paper exhibited reductions in tensile index （12#： 21.4%， 13#： 10.7%） and burst index （12#： 10.2%， 13#： 2.6%）， while their folding endurance increased by 25.6% and 3.2%， respectively. The tear index of US OCC 12# recycled paper increased， whereas that of US OCC 13# recycled paper decreased. Overall， the mechanical strength of US OCC 12# recycled paper was generally better than that of US OCC 13#. Grey relational analysis showed that the proportions of short fibers， fine fibers， and twisted fibers were the key factors affecting paper mechanical strength， primarily acting on fiber bonding interactions. |
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