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首页> 外文会议>55th Appita Annual Conference Apr 30-May 2, 2001 Hobart, Australia >Product development process options for secondary fibre liners
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Product development process options for secondary fibre liners

机译：二次纤维衬里的产品开发和工艺选择

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摘要

Globally, secondary fibre liners are strategically important packaging products providing lower cost substitutes for kraft liners while increasing the utilisation of recycled fibre. The recognised economic and environmental advantages of these materials have hitherto been exploited only on a limited scale in New Zealand. Furnish options based on local waste paper collections were evaluated for linerboard manufacture. The potential benefits from fibre processing scenarios involving fractionation and reject refining were also assessed. Quality gains from both blending and controlled placement of recycled and virgin fibre components in a duplex sheet were examined. The quality of laboratory-made sheets was highly dependent upon waste composition, with relatively small changes in nature and proportions causing significant changes (>10%) in all strength properties. The addition of ca. 30% lightly refined softwood kraft and/or semi-chemical eucalypt fibre into the waste paper furnish improved tensile (>15%), burst (>20%) and short span compression (>5%) properties while reducing dependency on waste paper quality. Fractionation of the recycled fibre coupled with reject refining yielded comparable strength along with possible benefits in freeness and/or energy consumption compared with compound, or whole stock refining. An optimum screening level, at around 40% mass reject rate was identified, a point at which sheet strength gains appeared to be maximised. Addition of eucalypt and kraft fibre as the top sheet on a recycled base improved overall strength values but to a lesser extent than observed with internal addition to handsheets.
机译：在全球范围内，次级纤维衬里是具有战略意义的包装产品，可在降低牛皮纸衬里成本的同时提高回收纤维的利用率。迄今为止，这些材料公认的经济和环境优势在新西兰仅得到了有限的开发。对基于当地废纸收集的家具选项进行了评估，以进行挂面纸板生产。还评估了涉及分馏和废料精制的纤维加工方案的潜在利益。检查了将再生纤维成分和原始纤维成分混合并控制放置在双工板中的质量提高。实验室制片的质量在很大程度上取决于废物的成分，其性质和比例的相对较小的变化会导致所有强度特性发生显着变化（> 10％）。 ca的加法。向废纸中添加30％的轻度精制的软木牛皮纸和/或半化学桉树纤维，可改善拉伸强度（> 15％），爆裂（> 20％）和短跨度压缩（> 5％），同时减少对废纸质量的依赖性。与混料或全浆精制相比，将回收纤维进行分馏再加上废料精制可获得相当的强度，并且在游离度和/或能耗方面可能带来好处。确定了最佳筛选水平，质量剔除率约为40％，这是使板材强度增加达到最大的点。在回收的基础上添加桉树纤维和牛皮纸纤维作为顶层，可以提高整体强度值，但程度比内部添加到手抄纸中的程度要小。

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