A crucial property of fibrous packaging paper for food is water resistance, while strength properties are also important. To improve these properties, several bio-coating solutions were applied as coatings on paper made of pineapple leaf pulp. The effects of beeswax, chitosan, shellac, alginate/gellan gum and beeswax–chitosan (1% chitosan+4%glycerol+30%beeswax) solutions on pineapple leaf pulp paper were assessed in relation to making biodegradable paper plates. The cooking time (120–180 min) of chemical pulping and the dose of pulp by moist weight (200, 250, and 300 g) to a paper frame (40 × 40 cm²) were also studied on making the paper samples. The papers were tested for their physical and mechanical properties. The optimal cooking time and dose of pulp by moist weight found were 180 min and 300 g of pulp per frame, respectively. The bio-coatings increased average grammage and thickness of paper, but gave density reduction from that of uncoated paper. Coating paper with beeswax–chitosan solution gave the longest absorbency time, followed in rank order by alginate/gellan gum, chitosan, beeswax and shellac. The maximum 5.9 kN/m² tensile strength was found for paper coated with beeswax–chitosan solution before hot pressing. On comparing papers bio-coated before or after hot pressing, no difference was found in the degradable time with NaAlg/gellan coating, while such difference was observed with beeswax-chitosan coating. The results suggest beeswax–chitosan solution as the best among the alternatives tested, for coating paper to make biodegradable plates.

用于食品的纤维包装纸的关键特性是耐水性，而强度特性也很重要。为了改善这些性能，将几种生物涂料溶液作为涂料涂覆在由菠萝叶纸浆制成的纸上。评估了蜂蜡，壳聚糖，虫胶，藻酸盐/吉兰胶和蜂蜡-壳聚糖（1％壳聚糖+ 4％甘油+ 30％蜂蜡）溶液对菠萝叶纸浆的影响，以制备可生物降解的纸碟。化学制浆的蒸煮时间（120–180分钟）以及纸浆的湿重（200、250和300 g）对纸架（40×40 cm ²的剂量））还研究了制作纸样的方法。测试了纸的物理和机械性能。最佳蒸煮时间和纸浆按湿重的剂量分别为每帧180分钟和300克纸浆。生物涂层增加了纸张的平均克重和厚度，但密度却低于未涂布纸。用蜂蜡-壳聚糖溶液涂布的纸吸收时间最长，其次是藻酸盐/吉兰糖胶，壳聚糖，蜂蜡和虫胶。最大5.9 kN / m ²在热压之前，涂有蜂蜡-壳聚糖溶液的纸的拉伸强度被发现。在比较热压之前或之后生物涂布的纸张时，NaAlg /结冷胶涂层的可降解时间没有发现差异，而蜂蜡-壳聚糖涂层则观察到这种差异。结果表明，蜂蜡-壳聚糖溶液是经过测试的最佳替代品，可用于涂布纸以制造可生物降解的板。