Air permeability has a valuable role in comfort parameters. It is known that air permeability of elastomeric yarns is firmly low. Despite that, usage of elastomeric inlay-yarns is the most common and the most effective way to generate compression for knitted textile. This study aims to investigate the influence of elastomeric inlay-yarn linear density, insertion density and elongation of the sample to the air permeability of compression knitted materials.,Two different types of knitting patterns were investigated: rib 1 × 1 pattern with different elastomeric inlay-yarn linear density (four variants) and insertion density (without inlay yarn and with inlay-yarns inserted into every single, second or fourth course) and combined laid-in jacquard pattern. The air permeability test for these structures was performed without any deformation and at 10 and 20 per cent fixed transverse elongation.,According to the investigation, insertion density of inlay-yarns has a huge impact on air permeability; however, air permeability of knitted material is not linearly proportional to the total amount of inlay-yarns. Also, it was found that air permeability increases by increasing elongation, regardless of knitting pattern and total amount of elastomeric inlay-yarn in the knitted structure. Alteration of the loop geometry at natural state and 20 per cent fixed elongation was established, and the increase of air permeability at fixed elongation may be dependent on changes of knitted material porosity.,According to the obtained results, recommendations to perform air permeability measurement at least with minimal specific wear elongation are presented.

中文翻译：

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结构和弹力对压缩针织物透气性的影响

透气性在舒适性参数中具有重要作用。众所周知，弹性纱线的透气性非常低。尽管如此，使用弹性嵌纱是为针织纺织品产生压缩力的最常见和最有效的方法。本研究旨在研究样品的弹性嵌纱线密度、插入密度和伸长率对压缩针织材料透气性的影响。研究了两种不同类型的针织图案：罗纹 1 × 1 图案与不同的弹性镶嵌- 纱线线密度（四种变体）和插入密度（无嵌纱和嵌纱插入每一个、第二或第四层）和组合嵌花提花图案。这些结构的透气性测试是在没有任何变形和10%和20%的固定横向伸长率下进行的。,据调查，嵌纱的插入密度对透气性有很大的影响; 然而，针织材料的透气性与嵌纱总量不是线性正比的。此外，发现透气性随着伸长率的增加而增加，而与针织结构中的针织图案和弹性嵌体纱线的总量无关。确定了自然状态下毛圈几何形状的改变和 20% 的固定伸长率，固定伸长率下透气性的增加可能取决于针织材料孔隙率的变化。,根据所得结果，