Increased recyclability of wet strengthened liquid packaging board, through synergetic effects of combining CMC and PAE – A case study in full scale

IF 0.9 4区 农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD Nordic Pulp & Paper Research Journal Pub Date : 2023-11-21 DOI:10.1515/npprj-2023-0034
Sara Christenson, Björn Sjöstrand
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Abstract

There is an ever-increasing demand for renewable, recyclable and biodegradable packaging solutions, from consumers, producers of goods, and producers of packaging materials. Closing the material loop and increasing recyclability of fiber-based package materials is one of the keys to move forward towards a more sustainable future. While the recyclability rates of fiber-based packaging are high, packaging boards with high wet-strength can pose problems due to problems with repulping. This manuscript investigated the possibilities to reduce the use of polyamide-epichlorohydrin resins (PAE) by supporting the process system with carboxy-methylated cellulose (CMC) through machine trials in mill scale production. The focus of the investigation was on the wet-strength of the board product and the repulpability value. The results given from the full-scale trial were positive, indicating a potential in using CMC while reducing the PAE addition. The results showed that wet tear strength and wet tensile strength of the board were maintained, while higher repulpability rates were given, encouraging better recyclability of the board material. This will be beneficial to the environment both with lower use of non-renewable chemicals and possibilities for higher degrees of recycling of the board products.
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CMC与PAE的协同作用提高湿强化液体包装板的可回收性——全尺寸案例研究
消费者、商品生产商和包装材料生产商对可再生、可回收和可生物降解的包装解决方案的需求不断增加。关闭材料循环和提高纤维基包装材料的可回收性是迈向更可持续未来的关键之一。虽然纤维基包装的可回收利用率很高,但湿强度高的包装板由于复浆问题可能会带来问题。本文通过在工厂规模生产中进行机器试验,研究了通过羧甲基化纤维素(CMC)支持工艺系统来减少聚酰胺-环氧氯丙烷树脂(PAE)使用的可能性。调查的重点是板产品的湿强度和可重复性值。全面试验的结果是积极的,表明在减少PAE添加的同时使用CMC的潜力。结果表明,湿撕裂强度和湿拉伸强度保持不变,同时具有较高的复吸率,有利于提高板材的可回收性。这将有利于环境,既可以减少不可再生化学品的使用,又可以提高纸板产品的回收程度。
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来源期刊
Nordic Pulp & Paper Research Journal
Nordic Pulp & Paper Research Journal 工程技术-材料科学:纸与木材
CiteScore
2.50
自引率
16.70%
发文量
62
审稿时长
1 months
期刊介绍: Nordic Pulp & Paper Research Journal (NPPRJ) is a peer-reviewed, international scientific journal covering to-date science and technology research in the areas of wood-based biomass: Pulp and paper: products and processes Wood constituents: characterization and nanotechnologies Bio-refining, recovery and energy issues Utilization of side-streams from pulping processes Novel fibre-based, sustainable and smart materials. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes. Topics Cutting-edge topics such as, but not limited to, the following: Biorefining, energy issues Wood fibre characterization and nanotechnology Side-streams and new products from wood pulping processes Mechanical pulping Chemical pulping, recovery and bleaching Paper technology Paper chemistry and physics Coating Paper-ink-interactions Recycling Environmental issues.
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