Preparation and Static Cushioning Property of Foaming Packaging Material with Hemp Haulm
Preparation and Static Cushioning Property of Foaming Packaging Material with Hemp Haulm
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DOI：
10.4028/www.scientific.net/amm.200.401
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发表时间：
2012-10
期刊：
影响因子：
--
通讯作者：
Jun Mu;Fengyan Wang;D. Zhang
中科院分区：
文献类型：
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作者：
Jun Mu;Fengyan Wang;D. Zhang
麻秆是大麻纤维加工后提取的剩余物，原料来源广泛，价格便宜，质量轻，纤维形状好，韧性好，强度高，缓冲性能好。为开拓大麻秆加工残渣的应用领域，以大麻秆为原料，采用复合无机发泡剂和玉米淀粉粘合剂，采用微波发泡法制备缓冲包装材料。分析了该材料的密度、泡沫分布和静态压缩性能等性能。实验结果表明，麻秆发泡缓冲包装材料密度为0.235-0.339g/cm3，泡孔数为14-25.5个/cm2，回弹率为62.2%-93.1%。影响麻秆泡沫材料性能的主要因素是粒径、发泡剂和粘合剂等。研究表明，当麻秆直径较小时，麻秆粉与淀粉的比例为1：0.4，淀粉与聚乙烯醇（PVA）的比例为1：0.5时，材料具有良好的缓冲性能。当复合发泡剂（碳酸氢钠、碳酸氢铵、碳酸铵）的配比为1:2:1时，材料的缓冲性能最好，强度也较高。与聚乙烯（EPE）和聚苯乙烯（EPS）相比，大麻泡沫材料比EPS硬，无明显屈服点，不发生材料塌陷，缓冲性能良好。当应力大于5～15 N/cm2时，麻秆发泡材料的缓冲性能优于EPE，但与EPS接近。
Hemp haulm is processing residues extracted after the hemp fiber, with wide raw material sources, cheap price, light quality, good fiber shapes, good toughness, high strength and good buffer performance. In order to develop the application field of hemp stalk processing residues, cushioning packaging materials were prepared using hemp haulm as raw material with the hybrid inorganic foaming agent and corn starch adhesive by microwave foaming method. The properties including density, foam distribution and static compressive properties of this material were analyzed. The experimental results indicated that the density of hemp haulm foaming cushioning packaging materials was 0.235-0.339g/cm3, cell numbers were 14-25.5/cm2, and rebound rate was 62.2%-93.1%. The major influence factors on the properties of hemp haulm foam material were the particle size, foaming agent and adhesives, etc. Research showed while the hemp haulm diameter was small, the ratio of hemp haulm power and starch was 1:0.4 and starch with polyvinyl alcohol (PVA) was 1:0.5, the materials had good buffer performance. When the ratio of compound foaming agent(sodium bicarbonate, ammonium bicarbonate, ammonium carbonate)was 1:2:1, the material had the best cushioning properties as well as higher strength. Compared with polyethylene (EPE) and polystyrene (EPS), the hemp foam material was harder than EPS with no obvious yield point, no material collapsing and good cushioning properties. When the stress was greater than 5-15 N/cm2, the cushioning property of the hemp haulm foaming material was better than EPE, but close to EPS.