The Relation between the Twist and Resistance to Repeated Extensions of Open-end-spun Blended-fibre Yarns
The Relation between the Twist and Resistance to Repeated Extensions of Open-end-spun Blended-fibre Yarns
复制标题
气流纺混纺纱捻度与耐反复延伸性能的关系
DOI：
10.1080/00405008208658921
复制
发表时间：
1982
期刊：
影响因子：
--
通讯作者：
A. Manich
中科院分区：
文献类型：
--
作者：
A. Barella;A. Manich
在较早的文献中，对合成纤维和棉制成的转杯纱的捻度和抗反复伸长性之间的关系进行了研究。本文的目的是完成有关混纺转杯纱的研究。实验仅限于一种涤纶纤维-棉（50%-50%）转杯纱和一种涤纶纤维-粘胶（80%-20%）转杯纱。纱线的线密度分别为40特和25特，捻系数a在75和190之间。纱线在BD 200型机器上纺制，带有F-72型转子，转速为36 000 r/min。对于涤纶-纤维-棉混纺，3.54-ktex的第二并条机条通过第三并条机通道通过并合和牵伸至6值进行混纺。将得到的3.54千特纱条喂入转杯。施加88.4的总牵伸以获得40.63特纱线。捻系数a为：94.66、120.27、131.31、167.80和189.33。对于聚酯-纤维-粘胶纤维共混物，将2.18-ktex牵伸机条喂入转子。施加85.64的总牵伸以获得25特纱线。扭转乘数，a。为：76.41、95.50、122、136、152.56和174。如在早期论文中所报道的，通过Comptiss仪器在300-mm 4长的纱线样品上进行测试。对于聚酯纤维棉纱，拉伸周期的幅度为7mm（23%相对拉伸），并且施加2.5cN/tex的载荷。对于聚酯-纤维-粘胶纱，振幅为8mm（2.7%相对伸长），施加的载荷相同（2.5cN/tex）。值得注意的是，我们在这里只打算确定给出最大疲劳抗力的扭转倍数，而不是抗力的绝对值。因此，不需要保持与先前实验相同的测试条件，但现在无法将获得的绝对电阻值与先前工作中的其他值进行比较。
In earlier papers*'^, the relationship between twist and resistance to repeated extensions was studied for rotor-spun yams produced from synthetic fibres and cotton. The present note is intended to complete the study so far as blended-fibre rotor-spun yarns are concerned. The experiments were confined to one polyester-fibre-cotton (50%-50%) rotor-spun yam and one polyester-fibre-viscose (80%-20%) rotor-spun yarn. The linear densities of the yarns were, respectively, 40 tex and 25 tex, and the twist multiplier, a, ranged between 75 and 190. Yams were spun on a BD200 machine with an F-72 type of rotor running at 36 000 r/min. For the polyester-fibre-cotton blend, 3.54-ktex second-drawframe slivers were blended through a third drawframe passage by doubling and drafting to a value of 6. The 3.54-ktex sliver obtained was fed into the rotor. A total draft of 88.4 was applied to obtain a 40.63-tex yarn. The twist multipliers, a, were: 94.66, 120.27, 131.31, 167.80, and 189.33. For the polyester-fibre-viscose blend, a 2.18-ktex drawframe sliver was fed into the rotor. A total draft of 85.64 was applied to obtain a 25-tex yarn. The twist multipliers, a. were: 76.41, 95.50, 122,136,152.56, and 174.Testing was done, as reported in earlier papers*'^, by means of the Comptiss instrument on 300-mm4ong yam specimens. For the polyester-fibre-cotton yarn, the amplitude of the extension cycle was 7 mm (23% relative extension), and a load of 2.5 cN/tex was applied. For the polyester-fibre-viscose yam, the amplitude was 8 mm (2.7% relative extension), the applied load being the same (2.5 cN/tex). It is useful to note that we intend here only to determine the twist multipher giving the maximum fatigue resistance and not the absolute value of the resistance. Thus, it was unnecessary to maintain the same test conditions as in previous experiments, but it is not now possible to compare the absolute resistance values obtained with others from earlier work.