原纸挤出涂布时耐热离型纸结合强度预测

Prediction Model about Coating Adhesive Strength of Extrusion Coating Process of Heat-Resistant Release Paper for Artificial Leather

合成革离型纸生产时,需要在原纸上挤出涂布DX820 TPX树脂以得到耐高温的离型纸。挤出涂布时,关系到纸膜结合强度的主要工艺参数是:螺杆转速x1、电晕功率x2、气隙高度x3、压区压力x4。为了找到挤出涂布时的主要工艺参数与纸膜结合强度之间的非线性回归模型,基于部分量纲消除的方法,设计了38种方案的解释变量组合。结果表明:选择x12x32/x2、x12x4作为解释变量组合的方案时回归,所得关联式的最大拟合误差为0.6122%。根据得到的关联式进行敏感度分析,定量计算表明:气隙高度对纸膜结合强度的影响呈现非线性关系。高精度关联式的建立,达到了根据螺杆转速、电晕功率、气隙高度、压区压力预测纸膜结合强度的目的。

When producing heat-resistant release paper for artificial leather, by extrusion coating DX820 TPX resin to obtain heat-resistant release paper. Regression model about the relationship between extrusion coating conditions （including screw speed, corona power, air gap height and nip pressure） and adhesive strength was researched. Based on part dimension reduction methods, 38 kinds of the explanatory variables combination were designed for non-linear regression programs, an explanation variable combination by X1^2X3^2/X2、 X1^2X4 as a solution for variable combination were found to explain the relationship between extrusion coating conditions affecting adhesive strength of coating and base paper. Fitting maximum error was 0.6122%. The quantitative calculation results by the sensitivity analysis of the correlation formula show that the air gap height has a nonlinear relationship with the strength of the paper. The establishment of high precision correlation formula can achieve the purpose of predicting coating adhesive strength of extrusion coating according to the screw speed, the corona power, the air gap height and nip pressure.