Abstract: Regarding the fixing method of the filling of down products, quilting or hot rolling is generally adopted to combine the inner and outer layers of high‑density fabrics to form a flocculent filling cavity. After filling with down, there will be a small amount of down filling near the quilting line or hot rolling point and the thickness difference with other filling parts is big, or even only the inner and outer layers of fabric without down, which will have an impact on the overall warmth of the down products. In the vicinity of the quilting line or hot rolling point of a down product where the filling density is small, the thickness difference with other filling parts is large and there exists a warmth‑retaining weak link. To address the above defects, a multi‑chamber quilting‑free three‑dimensional filling base fabric was developed using multi‑layer weaving. The filling cavities arranged alternately along the warp direction can enhance filling uniformity and eliminate thermal weaknesses. The filling cavity width and filling density were selected as the influencing factors of filling thermal insulation performance. Down filling samples were made with different filling cavity widths and different filling densities. A three‑dimensional model of “skin‑down‑filling base fabric” was constructed using SolidWorks. The finite element thermal analysis module of ANSYS Workbench was utilized to simulate and analyze heat transfer for models with varying cavity widths and filling densities. The results obtained from simulation were analyzed and compared with experimental data to validate the model’s accuracy. The results show that the staggered arrangement of filling cavities of this multi‑chambered non‑quilted filling base fabric can improve the filling uniformity and warmth retention. The down‑filled samples have uniform heat transfer in the X‑axis direction, the direction of the staggered arrangement of cavities, without the uneven heat transfer phenomenon caused by the filling defects of conventional quilting or hot‑rolled structures. At the same filling density, thermal insulation performance improves as the width of the filling cavity increases since a greater volume of stationary air is retained within the cavity. The simulation solution results of the finite element heat transfer model are in good agreement with the experimental results with an error of 3.53%, which has high prediction accuracy and important guiding significance. The model can be used for the subsequent improvement research of quilt‑free multi‑chamber three‑dimensional filling base fabric, which can greatly shorten the experimental time, improve the efficiency, reduce the cost and simplify the production process. By presetting the base fabric material parameters, the thermal insulation properties of products with varying cavity sizes and down fill quantities can be rapidly predicted. This provides reference for the development and optimized design of down products, particularly those intended for use in extreme cold conditions.

Key words: multi?cavity three?dimensional fabrics, quilting?free, warmth, finite element analysis, down

摘要： 针对传统绗缝或热轧工艺造成的羽绒制品局部填充不足、厚度不均、存在保暖薄弱区等问题,从织物结构出发,设计并制备了一种免绗缝多腔立体填充基布,利用 SolidWorks 建立了“皮肤-羽绒集合体-填充基布”三维几何模型,并通过 ANSYS Workbench 中的热分析模块,对不同填充腔宽度和填充密度条件下的传热过程进行稳态数值模拟并求解。 结果表明:该多腔立体填充基布成型后可沿经纱方向形成交错排列的独立腔体,填充羽绒样品在腔体排列方向(x 轴)热量分布均匀,未出现因传统工艺造成的传热不匀现象,有效克服了上述填充缺陷,增强了整体的保暖性能;相同填充密度条件下,随着填充腔宽度的增加,腔内所存留的静止空气量越多,保暖性能越好;有限元分析结果与实验测试结果的最大相对误差为 3. 53%,验证了该模型具有较高的预测精度。 研究建立的“皮肤-羽绒集合体-填充基布”三维几何模型可为免绗缝多腔立体填充基布的结构优化与性能预测提供可靠工具,有助于缩短研发周期、降低研究成本。

关键词: 多腔立体填充基布, 免绗缝, 保暖性, 有限元分析, 羽绒