Investigation on air texturing process for diacetate blending with polyester filaments

Zhang, Jing; Wang, Shanyuan; Qin, Xiaohong

doi:10.1007/bf02875833

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…Instability of the yarn did not show a clear trend with the change in yarn speed. This showed slightly different results to previous studies [5,6,27] because of difference in the mechanical properties, such as bending and torsional rigidities between the regular filaments and aramid 100% filament, as triacetate, PET and nylon/aramid increasing heater temperature due to an increase in the flatness by the heat treatment, which is shown in the optical microscopy images of specimens 14 and 18 in Figure 5. These results are in contrast to the results of previous studies [5,6,27] because of the difference in materials, that is, triacetate, polyester and nylon/ aramid in the previous studies [5,6,27] and the 100% aramid of this study.…”

Section: Thermal Shrinkage Of Aramid Atycontrasting

confidence: 80%

“…On the other hand, the instability increased with increasing air pressure. A higher air pressure produces a large were used in the previous study, [5,6,27] and 100% aramid was used in the present study. On the other hand, there was no difference in instability between specimens 2, 6, and 11 with the water wetted and non-wetted specimen 19.…”

Section: Thermal Shrinkage Of Aramid Atymentioning

confidence: 98%

“…Furthermore, there are few reports related to the air-jet textured yarns composed of high tenacity and modulus filaments applicable to the protective clothing and fiber-reinforced composites. Zhang et al [5] reported the effects of processing parameters, such as air pressure, texturing speed, under-feed ratio, and wetting, on the physical properties of diacetate air-jet textured yarns blended with polyester filaments. They [6] also examined the instability and boiling water shrinkage of diacetate/polyester air-jet textured yarns according to the over-feed ratios of the core and effect.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Processing Parameters on the Mechanical Properties of Aramid Air Textured Yarns for Protective Clothing

Kim¹,

Kim

2018

Autex Research Journal

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This study examined the mechanical properties of a para-aramid filament according to the processing conditions of air-jet textured yarns (ATY). The specimens were prepared by changing the yarn speed, over feed ratio, air pressure, and heater temperature, which are important processing factors in the ATY process. The basic physical properties of the ATY, such as denier, tenacity, breaking strain, and initial modulus, were measured and their thermal shrinkage, such as dry and wet shrinkage, were measured to determine the thermal stability of the aramid ATY. In addition, the instability of para-aramid ATY were measured and assessed with the loop formation of ATY, according to the ATY process parameters. An examination of the effects of process parameters on the physical properties of aramid ATY revealed the core overfeed and air pressure to be the main factors. A high core overfeed and air pressure make the aramid ATY crimpy in the yarn core and entangle the fluffy loops on the yarn surface, resulting in an increase in the yarn linear density and breaking strain as well as a decrease in the tenacity and initial modulus. In contrast, these yarn physical properties were unaffected by the yarn speed, heater temperature, and wetting treatment. In addition, the dry and wet thermal shrinkage were unaffected by the process parameters of ATY. On the other hand, the instability decreased with increasing core overfeed and heater temperature and increased with increasing air pressure. These results showed that a high core overfeed makes the aramid ATY crimpy with an entangled yarn structure, and high air pressure helps provide small loops on the yarn surface. Finally, a high heater temperature makes the crimpy ATY structure more stable due to the strong heat set, which results in low instability.

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