The effect of bulk density on the tensile strength and air permeability of a nonwoven needle-punched fabric based on polyester fibers with a linear density of 1.7 tex is investigated. The bulk density of the fabric was varied by processing in the clearance between a heated roller and a conveyor belt. A twofold increase in tensile strength was achieved with a relatively small decrease in air permeability.

中文翻译：

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非织造针刺织物的体积密度对其渗透性和机械性能的影响

研究了堆积密度对线密度为1.7 tex的聚酯纤维无纺针刺织物的拉伸强度和透气性的影响。织物的堆积密度通过在加热辊和传送带之间的间隙中进行处理而变化。抗张强度增加了两倍，而透气率的降低相对较小。