The porosity and air permeability of 3D polyester warp knitted spacer fabric has been determined by optimizing the structural parameters and using Box and Behnken experimental design. Spacer fabrics are developed by using polyester multifilament of 80 - 120 denier on the face layer and 30 - 70 denier on the bottom layer. Polyester monofilaments of 20 - 40 denier are used in the middle layer, deciding the third dimension of the fabric. Porosity and air permeability are estimated with respect to the linear density of polyester filaments, and response the surface design is used to predict the optimum linear density. Better air permeability and porosity are observed at the face layer denier of 100 and middle layer denier of 20. The statistical analysis proves that the degree of correlation of F values is 12.44 between the filament linear density and air permeability.

中文翻译：

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经编间隔织物的透气性评估

通过优化结构参数并使用Box and Behnken实验设计来确定3D聚酯经编间隔织物的孔隙率和透气率。间隔织物是通过在表层使用80-120旦尼尔，在底层的30-70旦尼尔的聚酯复丝制成的。在中间层使用20-40旦尼尔的聚酯单丝，决定了织物的三维尺寸。相对于聚酯长丝的线密度估计孔隙率和透气率，并且响应该表面设计用于预测最佳线密度。在表层旦数为100和中间层旦数为20时观察到更好的透气性和孔隙率。统计分析证明F值的相关程度为12。