目的 分析聚乳酸(Polylactic Acid，PLA)镀铝膜与牛皮纸复合对牛皮纸基复合材料性能的影响，研究该纸基复合包装对提升中草药薄荷保鲜效果的作用，探讨其在农产品包装保鲜领域的应用潜力。方法 通过PLA镀铝膜与牛皮纸复合，增强牛皮纸的阻隔性能和力学性能，弥补单纯牛皮纸阻隔和力学性能较差的缺点。结果 与PLA镀铝膜复合后的牛皮纸基复合材料力学性能、阻隔性能均得到显著提升;复合包装对薄荷的应用研究测试表明，该复合材料具有良好的阻隔性能和防霉性能，且符合环保要求。结论 PLA镀铝膜/牛皮纸复合包装能有效降低薄荷的质量损失率，维持其颜色和新鲜度，延长保鲜期限。感官评价结果表明，牛皮纸基复合包装材料在维持薄荷的颜色、完整度和脆性方面表现更佳。

The work aims to analyze the effect of aluminized polylactic acid (PLA) film and kraft paper composite on the properties of kraft paper composites, study the effect of the paper composite packaging on the preservation of Chinese herbal medicine mint, and discuss its application potential in the field of packaging and preservation of agricultural products. The barrier properties and mechanical properties of kraft paper were enhanced by the composite of PLA aluminized film and kraft paper, and the disadvantages of simple kraft paper were made up. The mechanical properties and barrier properties of kraft paper matrix composites with PLA aluminized films were significantly improved. The application of the composite packaging to mint showed that the composite had good barrier properties and anti-mold properties, and met the requirements of environmental protection. PLA aluminized film/kraft paper composite packaging can effectively reduce the weight loss rate of mint, maintain its color and freshness, and extend the freshness period. The results of sensory evaluation show that the kraft paper based composite packaging material has better performance in maintaining the color, integrity and brittleness of mint.