Poly (trimethylene terephthalate) modified cross-section yarn

A kind of polytrimethylene terephthalate isoform, polytrimethylene terephthalate technology, which is applied in the field of polytrimethylene terephthalate fiber and its manufacture, and can solve the problem of no hint or the like

Inactive Publication Date: 2005-04-06
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned publication, there is no description or even a hint about the occurrence of the congestion phenomenon of special-shaped yarns and the countermeasures for reducing the congestion.

Method used

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  • Poly (trimethylene terephthalate) modified cross-section yarn
  • Poly (trimethylene terephthalate) modified cross-section yarn
  • Poly (trimethylene terephthalate) modified cross-section yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3、 comparative example 1～4

[0102] 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.

[0103] 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.

[0104] The spinning machine can install 16 spinning spinnerets at the same time.

[0105] 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

[0162] 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.

[0163] 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.

[0164] 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.

[0165] In Example 5 where the spinning temperature was 270°C, the spinning state and the contamination of the spinneret holes were good.

[0166] 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

[0169] 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.

[0170] 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.

[0171] Titanium oxide contains

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Abstract

A poly(trimethylene terephthalate) modified cross section yarn which comprises a poly(trimethylene terephthalate) being comprised of 95 mole % or more of trimethylene terephthalate recurring units and 5 mole or less of recurring units of another ester and having an intrinsic viscosity [eta] of 0.7 to 1.3 (dl / g), and has a modified cross section of trilobar type, said trilobar cross section having a perimeter the whole of which is a curve being convex towards the outside thereof or is composed of such a curve and a straight line. The above cross section yarn can be produced with suppressed attachment of a polymer to a spinneret and reduced staining, and also with reduced forming of fluff and thread breakage, and thus has allowed, for the first time, the commercial production with stability of a modified cross section yarn of the above-mentioned type. The cross section yarn is excellent, in particular, for clothing.

Description

technical field [0001] The invention relates to a polytrimethylene terephthalate fiber obtained by a melt spinning method and a manufacturing method thereof. More specifically, the present invention relates to a polytrimethylene terephthalate shaped yarn having a trilobal cross-section most suitable for clothing materials, and an industrial production method capable of stably and continuously producing the shaped yarn for a long period of time. Background technique [0002] People have known polyethylene terephthalate (hereinafter referred to as PET) special-shaped yarns with special-shaped cross-sections such as trilobal-shaped cross-sections close to a triangle for a long time, and are industrially produced in large quantities. The PET special-shaped yarn, generally, does not contain a matting agent-titanium oxide or a polymer (commonly known as a transparent polymer) containing a small amount of titanium oxide compared with a circular cross-section fiber, passing through ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/253D01F6/62
CPCD01D5/253D01F6/62Y10T428/2913Y10T428/2969Y10T428/2973
Inventor 阿部孝雄东洋一郎小柳正
Owner ASAHI KASEI KK
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