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目前国内外对于生物质包装材料的研究多采用热压成型工艺,以淀粉、纤维及增塑剂等为基材进行制备,其生产效率较低,且原料中一般都含有对环境有害的成分。因此,以绿色环保的废纸纤维、淀粉生物质材料、丙三醇等为原料,采用正交试验法,研究了一种可连续生产的环保型生物质包装材料挤出式加工最佳工艺及其配方。结果表明:生产环保型生物质包装材料的最佳配方为质量分数为11%的淀粉、11%的丙三醇、78%的废纸纤维,且原材料的含水率为80%;最佳工艺为螺杆挤出机的3段温度分别设定为65,65,80℃,螺杆转速为45 r/min。在选定的最佳配方与工艺条件下,所制备的生物质包装材料试样的性能最优,并可实现连续生产。
At present, the research on biomass packaging materials at home and abroad mostly uses hot pressing forming process, which is prepared by using starch, fiber and plasticizer as the base materials, and the production efficiency is low, and the raw materials generally contain ingredients that are harmful to the environment. Therefore, using green paper, staple fiber, starch and glycerol as raw materials, the orthogonal experiment was used to study the best extrusion process of environmentally friendly biomass packaging materials Its recipe. The results showed that the best formula of environmentally friendly biomass packaging material was starch with 11%, 11% glycerol, 78% waste paper fiber, and the moisture content of raw material was 80%. The best process was Three stages of screw extruder temperature were set at 65,65,80 ℃, screw speed 45 r / min. Under the optimal formulation and process conditions, the prepared samples of biomass packaging material have the best performance and can be continuously produced.