A spinning method for prolonging the cleaning period of special-shaped cross-section fiber production

A special-shaped cross-section and fiber technology, applied in the field of spinning, can solve the problems of reducing the number and hardness of oligomer aggregation, unreasonable heating mode and structure in the slow cooling zone, and prolonging the cleaning cycle of special-shaped cross-section fibers, so as to reduce the temperature. , Conducive to fiber quality, prolonging the effect of cleaning cycle

Active Publication Date: 2020-05-22
JIANGSU HENGLI CHEM FIBER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of unreasonable heating mode and structure in the slow cooling zone in the prior art, and provide a spinning method that prolongs the cleaning period of special-shaped cross-section fiber production. The present invention adopts a cylindrical slow cooling chamber Changing it to a rectangular columnar shape expands the space for spinning oligomers to escape, and changes the active heating slow cooling zone to a non-heating heat preservation type, which reduces the number and hardness of oligomers on the high-temperature spinneret, greatly Amplitude prolongs the cleaning cycle of special-shaped cross-section fiber

Method used

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  • A spinning method for prolonging the cleaning period of special-shaped cross-section fiber production
  • A spinning method for prolonging the cleaning period of special-shaped cross-section fiber production
  • A spinning method for prolonging the cleaning period of special-shaped cross-section fiber production

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Embodiment 1

[0033] A spinning method for prolonging the cleaning period of special-shaped cross-section fiber production, its schematic diagram is as follows image 3As shown, the insulation board 6 is embedded and hung on the bottom of the spinning box 1. There is a gas-phase heat medium 2 in the spinning box 1. The inside of the insulation board 6 is hollow in a "back shape", and a hollow chamber I3 is set inside. The cross-section of the chamber is rectangular, with the side parallel to the line connecting the centers of the spinnerets as the long side direction, and the length of the long side is 1.2 times the sum of the diameters of the multiple spinnerets, and the direction perpendicular to the long side The length of the short side is 1.7 times the diameter of the spinneret, and a spacer with a thickness of 1 mm is inserted in the hollow chamber I3 to divide it into a plurality of slow cooling chambers. Each slow cooling chamber has A circular spinneret. The diameters of the spinn...

Embodiment 2

[0040] A spinning method for prolonging the board-cleaning cycle of special-shaped cross-section fiber production, its structure is basically the same as that of Example 1, the difference is that the thickness of the spacer is 2 mm, the insulation material filled in the insulation board is ceramic fiber, and its heat-resistant temperature is 405 ° C , The thickness of the insulation board is 40mm, the wall thickness of the stainless steel plate is 1.2mm, and the thickness of the heat insulation board is 35mm.

[0041] Use the above-mentioned device for super-bright special-shaped cross-section fiber spinning operation. After the temperature of the insulation board and the box are fully balanced, the temperature of the spinneret surface is detected. The measured temperature is 263°C, which is higher than the lowest temperature of 240°C for normal production. ℃, can spin smoothly, the average cleaning cycle is 31 hours, and the cleaning cycle is extended by 40%.

Embodiment 3

[0043] A spinning method for prolonging the board-cleaning cycle of special-shaped cross-section fiber production, its structure is basically the same as that of Example 1, the difference is that the thickness of the spacer is 3 mm, the insulation material filled in the insulation board is rock wool, and its heat-resistant temperature is 410 °C , The thickness of the insulation board is 50mm, the wall thickness of the stainless steel plate is 1.5mm, and the thickness of the heat insulation board is 45mm.

[0044] Use the above-mentioned device for super-bright special-shaped cross-section fiber spinning operation. After the temperature of the insulation board and the box are fully balanced, the temperature of the spinneret surface is detected. The measured temperature is 268 ° C, which is higher than the lowest temperature of 240 ° C for normal production. ℃, can spin smoothly, the average cleaning cycle is 30 hours, and the cleaning cycle is extended by 35%.

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Abstract

The invention relates to a spinning method for prolonging the plate-clearing period of special-shaped cross-section fiber production. The longitudinal height is kept unchanged, and the area of the cross section of a slow cooling cavity is increased; meanwhile, the slow cooling cavity keeps the plate surface temperature of a spinneret by utilizing natural heat preservation and additionally arranging a heat insulation plate on the lower portion of a heat preservation plate to extend a wind-free region; the plate-clearing period of special-shaped cross-section fiber production is prolonged by 35-55%; increase of the cross section area of the slow cooling cavity means that the cross section of the slow cooling cavity is changed from round to rectangular on the premise that the spinneret connected with the slow cooling cavity is kept unchanged. A cylindrical slow cooling cavity is changed into the rectangular cylindrical slow cooling cavity, the spinning oligomer escape space is expanded, an active heating type slow cooling area is changed into a non-heating heat preservation type, the gathering quantity and hardness of oligomers on the high-temperature spinneret are reduced, special-shaped cross-section fiber plate-clearing period is greatly prolonged, the production efficiency is improved, the energy consumption is reduced, waste fibers are reduced, the spinning quality is improved, and the labor intensity of workers is reduced.

Description

technical field [0001] The invention belongs to the field of spinning, and relates to a spinning method for prolonging the cleaning period of special-shaped cross-section fibers, and in particular to a method of expanding the escape space of spinning oligomers and setting a non-heating and heat-preserving slow cooling zone to reduce the low temperature. The number and hardness of the aggregated polymer on the high-temperature spinneret, and the spinning method that prolongs the cleaning cycle of the special-shaped cross-section fiber. Background technique [0002] In the traditional polyester filament production process, a slow cooling zone is usually set up for two purposes: one is to ensure that the filaments will not be cooled rapidly as soon as they come out of the spinneret, resulting in high orientation of the filaments due to rapid cooling. Due to the high temperature inside, the macromolecules are still in a disordered state, and the radial structure of the fibers is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/253D01D11/00D01D13/02
CPCD01D5/253D01D11/00D01D13/02
Inventor 代居宴张建光王山水吴锋尹立新支录进胡新照魏存宏陈明志熊克陈锋杨顺军邢举
Owner JIANGSU HENGLI CHEM FIBER
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