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Polyester compound filament

A composite filament and polyester technology, applied in the field of polyester composite filament, can solve problems such as poor mechanical properties and appearance

Inactive Publication Date: 2006-05-10
HYOSUNG ADVANCED MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chips with a high intrinsic viscosity have too large a difference in intrinsic viscosity between the surface and the central portion, resulting in excessive filament breakage during melt spinning and drawing, thus providing filaments with poor mechanical properties and appearance.

Method used

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  • Polyester compound filament
  • Polyester compound filament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Using an antimony compound as a polymerization catalyst, solid-phase polymerization was carried out to produce polyethylene terephthalate chips with an intrinsic viscosity of 1.1, a water content of 20 ppm, and a residual antimony compound of 220 ppm. The chips obtained were melt-spun through an extruder at 288° C. and a speed of 900 g / min, so that the single fineness of the final drawn yarn was 3.0 denier. Then, the spun silk is continuously passed through the buffer cooling zone of the length 130mm and the cooling zone of the length 530mm (blowing into the cooling air with 0.5 m / s wind speed and 20 ℃) ​​positioned at the buffer cooling zone of the length immediately below the nozzle, and solidifies (refer to figure 1 ). The cured yarn was oiled and drawn out at a speed of 2,600 m / min to produce an undrawn yarn. Afterwards, the unstretched yarn is stretched in 3 stages, the total draw ratio is 2.15, and heat-fixed at 230°C, buffered by 2%, and then curled to obtain th...

Embodiment 2-7 and comparative example 1-7

[0068] The intrinsic viscosity of the chips, the spinning temperature, the spinning speed, the single fineness, the orientation-related birefringence or density of the undrawn filaments, or the total draw ratio were varied as shown in Table 1 below, and compared with the above-mentioned examples 1 Experiment with the same method to manufacture various drawn wires and process cords.

[0069] The physical properties of the drawn yarns and treated cords thus manufactured were evaluated, and the results are shown in Table 1 below.

[0070]

Minute

kind

broken

piece

solid

Have

stick

Spend

spin

Silk

warm

Spend

(℃)

spin

Silk

fast

Spend

(m /

Minute)

one

fiber

Spend

total

pull

stretch out

Compare

*

Undrawn yarn

drawn wire

Processing cord

prepare

No...

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Abstract

Provide a kind of manufacturing by the following method: (A) will contain more than 90 (mol) % of ethyl terephthalate repeating units, the intrinsic viscosity is 1.05-1.13 range of solid-phase polymerized polyester chips, at 290-298 ℃ The step of melt spinning through the spinning nozzle to obtain molten filaments; (B) the step of quenching and solidifying the melt spinning through the solidification belt; (C) will make the birefringence of the undrawn filaments The rate of 0.06-0.09, the density of 1.360-1.375 to adjust the speed of the solidified silk, the step of coiling, and (D) the step of subjecting the coiled silk to high temperature drawing at a total draw ratio of 1.5-2.5, Its physical properties are: (1) single fineness is 2.5-3.5 denier, (2) intrinsic viscosity is 0.94-1.00, (3) DEG (ethylene glycol) content is 0.65-0.9% by weight, (4) CEG (Carboxyl) content is 23eq・ / 10 6 g or less, (5) tensile strength of 7.5-8.5 g / d, (6) elongation of 13.0-16.0%, (7) shrinkage of 4.0-7.0%, and (8) silk factor (strength (g) / d) × Elongation at break) is a polyester composite filament of 27 or more.

Description

technical field [0001] The present invention relates to an improved polyester composite filament with high modulus and low shrinkage, which is used as a reinforcing material for rubber products such as tires. Background technique [0002] Polyester filaments are widely used in various industrial rubber products such as tires, strips, conveyor belts, V-belts, and hoses. In particular, treated cords produced by subjecting polyester filaments to latex treatment and heat treatment have excellent dimensional stability and tensile strength suitable for use as reinforcing material tire cords. [0003] US Patent No. 4,101,525 (Davis et al.) and US Patent No. 4,491,657 (Zieten et al.), provide industrial polyester composite filaments with high initial modulus and low shrinkage. However, these filaments exhibit lower tensile strength (toughness) than conventional tire cords when converted into treated cords. [0004] Therefore, in order to improve the tensile strength of polyester c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/098D01F6/62B60C9/00D01D5/08D02G3/48
CPCD01D5/08D01F6/62D02G3/48Y10T428/2913Y10T428/2929Y10T428/2933Y10T428/2967Y10T428/2969
Inventor 赵殷来吴德镐崔松柱
Owner HYOSUNG ADVANCED MATERIALS CORP