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Polytrimethylene terephthalate fiber and process for producing the same

A technology of polytrimethylene terephthalate and trimethylene phthalate, which is applied in the field of polytrimethylene terephthalate fiber and its manufacture

Inactive Publication Date: 2002-07-10
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Therefore, so far, there has been no report of PTT-POY that does not cause entanglement and swelling, and can stably perform stretching and false twisting for a long time.

Method used

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  • Polytrimethylene terephthalate fiber and process for producing the same
  • Polytrimethylene terephthalate fiber and process for producing the same
  • Polytrimethylene terephthalate fiber and process for producing the same

Examples

Experimental program
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Effect test

Embodiment 1～7

[0428] Add dimethyl terephthalate and 1,3-propanediol into the reactor at a molar ratio of 1:2, then add titanium tetrabutoxide equivalent to 0.1wt% of dimethyl terephthalate, under normal pressure The transesterification reaction was completed under the condition that the heater temperature was 240°C. Then add trimethyl phosphate equivalent to 0.05wt% of dimethyl terephthalate, 0.1wt% titanium tetrabutoxide and titanium dioxide equivalent to 0.5wt% of theoretical polymer weight, and react at 270°C for 3 hours .

[0429] As titanium dioxide, anatase-type crystalline titanium dioxide having an average particle diameter of 0.2 μm was used. The titanium dioxide was dispersed in 1,3-propanediol at a ratio of 20 wt % using a homogenizer, centrifuged at 6000 rpm for 30 minutes, and then filtered with a 5 μm membrane filter. Immediately before adding the obtained dispersion to the reaction system, it was stirred and then added.

[0430] The obtained polymer was placed in a nitroge...

Embodiment 8

[0436] According to the same steps as in Example 1 and the conditions shown in Table 1, a fiber of 56dtex / 24f was obtained. Table 2 shows the physical properties of the obtained fibers.

[0437] The obtained fibers corresponded to the scope of the present invention, and no filament breakage or napping was observed during spinning. In addition, the wound cheese package can be easily pulled out of the mandrel, and the expansion rate is in a good range.

Embodiment 9、10

[0439] In addition to not adding titanium tetrabutoxide during the transesterification reaction but adding 0.1 wt% of dimethyl terephthalate to a mixture formed by calcium acetate and cobalt acetate tetrahydrate in a ratio of 7:1, and in the In the region where the fibers are heated, except for the equipment shown in Figure 6(A), the rest are operated according to the same steps as in Example 1 and the conditions shown in Table 1 to obtain fibers of 126dtex / 36f. At this time, heating is performed by the second roll 16 shown in FIG. 6(A).

[0440] Table 2 shows the physical properties of the obtained fibers. The obtained fibers corresponded to the scope of the present invention, and no filament breakage or napping was observed during spinning. In addition, the wound cheese package can be easily pulled out of the mandrel, and the expansion rate is in a good range.

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Abstract

A polytrimethylene terephthalate fiber, a method for producing the same, a cheese-shaped package formed thereof, a false-twist textured yarn using the fiber and a fabric using the false-twist textured yarn are provided. The fiber is composed of 90 mol% or more of trimethylene terephthalate repeating units having a density in a range from 1.320 to 1.340 g / cm<3>, a birefringence in a range from 0.030 to 0.070, a peak value of thermal stress in a range from 0.01 to 0.12 cN / dtex, a boiling water shrinkage in a range from 3 to 40%, and an elongation at break in a range from 40 to 140%. The inventive polytrimethylene terephthalate fiber has both of proper crystallinity and orientation and is free from the package tightness due to yarn shrinkage and the bulge. The inventive fiber can be produced on an industrial scale.

Description

technical field [0001] The present invention relates to poly(trimethylene terephthalate) fiber suitable for high-speed drawing and false-twisting processing and its manufacturing method. More specifically, the present invention relates to a partially oriented polytrimethylene terephthalate fiber which can be produced on an industrial scale and which can be stably stretched and false-twisted over a long period of time, and a method for producing the fiber. Background technique [0002] Polytrimethylene terephthalate (hereinafter referred to as polytrimethylene terephthalate) can be obtained by polycondensation of terephthalic acid or lower alcohol esters of terephthalic acid represented by dimethyl terephthalate and propylene glycol (1,3-propanediol). PTT), the fiber made of PTT not only has low elastic modulus (soft feel), excellent elastic recovery and easy dyeing properties similar to polyamide, but also has light resistance, heat setting, Dimensional stability, low water...

Claims

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Application Information

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IPC IPC(8): D01F6/62D01F6/92
CPCB65H2301/5144Y10T428/29D01F6/62B65H2515/12D01F6/92
Inventor 藤本克宏加藤仁一郎
Owner ASAHI KASEI KK
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