响应面法优化稻草模塑材料热压工艺参数  

Hot-pressing Process Parameters of Rice Straw Molding Material Optimized Based on Response Surface Method

作　　者：杜亚洲 肖生苓[1] 岳金权[2] DU Ya-zhou;XIAO Sheng-ling;YUE Jin-quan(Northeast Forestry University.College of Engineering and Technology,Harbin 150040,China;Northeast Forestry University,College of Materials Science and Engineering,Harbin 150040,China)

机构地区：[1]东北林业大学工程技术学院,哈尔滨150040 [2]东北林业大学材料科学与工程学院,哈尔滨150040

出　　处：《包装工程》2018年第21期63-71,共9页Packaging Engineering

基　　金：哈尔滨市应用技术研究与开发项目(2016RAXXJ004)

摘　　要：目的探讨热压过程中压力、温度和湿纸胚含水率等因素对稻草秸秆纤维模塑包装材料主要力学性能的影响,确定各因素的权重及最佳工艺参数。方法采用单因素试验法和响应曲面法,以裂断长和弯曲强度为评价指标,确定最佳工艺条件。结果最佳热压工艺条件,热压温度为175℃,热压压力为6.9 MPa,湿纸胚含水率为70%,此时得到的平均裂断长为7697.93 m,弯曲强度为72.36 MPa,与理论裂断长7712.62m、弯曲强度71.44MPa接近,优化结果可信。热压过程中各因素对模塑包装材料裂断长和弯曲强度影响的大小为湿纸胚含水率>热压压力>热压温度。结论过高的温度会造成半纤维素的热解,过高的压力会导致纤维的压溃,过高的含水率产生的能耗过高。适当的热压工艺参数能够降低能耗,保证模塑包装材料的品质及性能。The work aims to investigate the effects of pressure,temperature and moisture content of wet paper embryos on the main mechanical properties of rice straw fiber molded packaging materials,and to determine the weights of each factor and the optimum process parameters.The single factor test method and response surface method were used to determine the optimum process conditions,with the breaking length and bending strength as the evaluation indicators.When the optimum hot-pressing conditions were:hot-pressing temperature of 175℃,hot-pressing pressure of 6.9 MPa and wet paper embryo moisture content of 70%,the average breaking length was 7697.93 m,and the bending strength was 72.36 MPa,both of which were close to the theoretical breaking length(7712.62 m)and the theoretical bending strength(71.44 MPa).As a result,the optimized result was credible.The influence of various factors on the breaking length and bending strength of molded packaging materials in the hot-pressing process was:wet paper embryo ture content>hot-pressing pressure>hot-pressing temperature.In conclusion,excessively high temperatures will cause pyrolysis of hemicellulose,excessively high pressure will cause crushing of the fibers,and excessively high ture content will lead to excessively high energy consumption.Proper hot-pressing process parameters can reduce energy consumption and ensure the quality and performance of molded packaging materials.

关 键 词：模塑纤维 热压工艺 裂断长 弯曲强度 响应曲面法 

分 类 号：TB484.1[一般工业技术—包装工程]