Poly (trimethylene terephthalate) modified cross-section yarn
A polytrimethylene terephthalate special-shaped, polytrimethylene terephthalate technology, applied in the field of polytrimethylene terephthalate fiber and its manufacture, can solve problems such as implying no
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Embodiment 1~3、 comparative example 1~4
[0096] For transparent 3GT particles containing 0.05% by weight of titanium oxide and having an intrinsic viscosity [η] of 0.90 (dl / g), use Figure 8 and Figure 9 With the spinning machine and drawing machine (twisting machine) as shown, a production test of a multifilament special-shaped yarn with a trilobal cross-section of 38.9 decitex (35 denier) / 24 filaments was carried out.
[0097] Using this test, the product V×[η] of the ejection linear velocity V ejected from the Y-shaped hole of the spinning spinneret and the intrinsic viscosity [η] of 3GT is used to determine the single yarn cross-sectional shape, congestion, and The occurrence of the phenomenon and the influence of the stable spinning time were studied.
[0098] The spinning machine can install 16 spinning spinnerets at the same time.
[0099] In each example, 16 undrawn yarns were simultaneously spun, and during this period, a test was carried out with a procedure of performing 4 alternate windings on a 5 kg c...
Embodiment 5、 comparative example 5~7
[0153] In Example 3, the experiment was carried out in the same manner as in Example 3 except that the spinning temperature and the surface temperature were changed. The results are shown in Table 3.
[0154] In Comparative Example 5, where the spinning temperature was low, fusion cracking occurred, and spinning could not be performed. Since the spinneret display temperature was also low, dirt was generated in the spinneret hole immediately after spinning.
[0155] In addition, in Comparative Example 6 where the spinning temperature was high, there was no dirt in the spinning orifice, but the cotton yarn was greatly bent, and yarn breakage often occurred during the spinning process.
[0156] In Example 5 where the spinning temperature was 270°C, the spinning state and the contamination of the spinneret holes were good.
[0157] In Comparative Example 7 in which the spinneret heater was used to increase the surface temperature of the spinneret, although there was no dirt in th...
Embodiment 3
[0160] In Example 3, except that the content of titanium oxide was changed, the spinning test was carried out in the same manner as in Example 3, and the obtained special-shaped yarn was evaluated for glossiness, luster, and stretching yield (stretch doffing 2-2). evaluate. The results are shown in Table 4.
[0161] As shown in Table 4, Example 6 with a titanium oxide content of 0.01 wt% has higher gloss and harsh gloss than Example 6 with a titanium oxide content of 0.05 wt%, and the elongation yield is also slightly poor. In addition, in Example 8 having a high concentration of titanium oxide, the stretching yield was good, but compared with Example 7, the glossiness was slightly inferior.
[0162] Titanium oxide contains
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